use yew::prelude::*;
use chrono::{Datelike, NaiveDate, Duration, Weekday, Local, Timelike, NaiveDateTime, NaiveTime};
use std::collections::HashMap;
use web_sys::MouseEvent;
use crate::services::calendar_service::UserInfo;
use crate::models::ical::VEvent;
use crate::components::{RecurringEditModal, RecurringEditAction, EventCreationData, EventStatus, EventClass, ReminderType, RecurrenceType};

#[derive(Properties, PartialEq)]
pub struct WeekViewProps {
    pub current_date: NaiveDate,
    pub today: NaiveDate,
    pub events: HashMap<NaiveDate, Vec<VEvent>>,
    pub on_event_click: Callback<VEvent>,
    #[prop_or_default]
    pub refreshing_event_uid: Option<String>,
    #[prop_or_default]
    pub user_info: Option<UserInfo>,
    #[prop_or_default]
    pub on_event_context_menu: Option<Callback<(web_sys::MouseEvent, VEvent)>>,
    #[prop_or_default]
    pub on_calendar_context_menu: Option<Callback<(web_sys::MouseEvent, NaiveDate)>>,
    #[prop_or_default]
    pub on_create_event: Option<Callback<(NaiveDate, NaiveDateTime, NaiveDateTime)>>,
    #[prop_or_default]
    pub on_create_event_request: Option<Callback<EventCreationData>>,
    #[prop_or_default]
    pub on_event_update: Option<Callback<(VEvent, NaiveDateTime, NaiveDateTime, bool, Option<chrono::DateTime<chrono::Utc>>)>>,
    #[prop_or_default]
    pub context_menus_open: bool,
    #[prop_or_default]
    pub time_increment: u32,
}

#[derive(Clone, PartialEq)]
enum DragType {
    CreateEvent,
    MoveEvent(VEvent),
    ResizeEventStart(VEvent), // Resizing from the top edge (start time)
    ResizeEventEnd(VEvent),   // Resizing from the bottom edge (end time)
}

#[derive(Clone, PartialEq)]
struct DragState {
    is_dragging: bool,
    drag_type: DragType,
    start_date: NaiveDate,
    start_y: f64,
    current_y: f64,
    offset_y: f64, // For event moves, this is the offset from the event's top
    has_moved: bool, // Track if we've moved enough to constitute a real drag
}

#[function_component(WeekView)]
pub fn week_view(props: &WeekViewProps) -> Html {
    let start_of_week = get_start_of_week(props.current_date);
    let week_days: Vec<NaiveDate> = (0..7)
        .map(|i| start_of_week + Duration::days(i))
        .collect();

    // Drag state for event creation
    let drag_state = use_state(|| None::<DragState>);
    
    // State for recurring event edit modal
    #[derive(Clone, PartialEq)]
    struct PendingRecurringEdit {
        event: VEvent,
        new_start: NaiveDateTime,
        new_end: NaiveDateTime,
    }
    
    let pending_recurring_edit = use_state(|| None::<PendingRecurringEdit>);

    // Helper function to get calendar color for an event
    let get_event_color = |event: &VEvent| -> String {
        if let Some(user_info) = &props.user_info {
            if let Some(calendar_path) = &event.calendar_path {
                if let Some(calendar) = user_info.calendars.iter()
                    .find(|cal| &cal.path == calendar_path) {
                    return calendar.color.clone();
                }
            }
        }
        "#3B82F6".to_string()
    };

    // Generate time labels - 24 hours plus the final midnight boundary
    let mut time_labels: Vec<String> = (0..24).map(|hour| {
        if hour == 0 {
            "12 AM".to_string()
        } else if hour < 12 {
            format!("{} AM", hour)
        } else if hour == 12 {
            "12 PM".to_string()
        } else {
            format!("{} PM", hour - 12)
        }
    }).collect();
    
    // Add the final midnight boundary to show where the day ends
    time_labels.push("12 AM".to_string());
    

    // Handlers for recurring event modification modal
    let on_recurring_choice = {
        let pending_recurring_edit = pending_recurring_edit.clone();
        let on_event_update = props.on_event_update.clone();
        let _on_create_event = props.on_create_event.clone();
        let on_create_event_request = props.on_create_event_request.clone();
        let events = props.events.clone();
        Callback::from(move |action: RecurringEditAction| {
            if let Some(edit) = (*pending_recurring_edit).clone() {
                match action {
                    RecurringEditAction::ThisEvent => {
                        // Create exception for this occurrence only
                        
                        // 1. First, add EXDATE to the original series to exclude this occurrence
                        if let Some(update_callback) = &on_event_update {
                            let mut updated_series = edit.event.clone();
                            updated_series.exdate.push(edit.event.dtstart);
                            
                            // Keep the original series times unchanged - we're only adding EXDATE
                            let original_start = edit.event.dtstart.with_timezone(&chrono::Local).naive_local();
                            let original_end = edit.event.dtend.unwrap_or(edit.event.dtstart).with_timezone(&chrono::Local).naive_local();
                            
                            web_sys::console::log_1(&format!("📅 Adding EXDATE {} to series '{}'", 
                                edit.event.dtstart.format("%Y-%m-%d %H:%M:%S UTC"),
                                edit.event.summary.as_deref().unwrap_or("Untitled")
                            ).into());
                            
                            // Update the original series with the exception (times unchanged)
                            update_callback.emit((updated_series, original_start, original_end, true, None)); // preserve_rrule = true for EXDATE, no until_date
                        }
                        
                        // 2. Then create the new single event using the create callback
                        if let Some(create_callback) = &on_create_event_request {
                            // Convert to EventCreationData for single event
                            let event_data = EventCreationData {
                                title: edit.event.summary.clone().unwrap_or_default(),
                                description: edit.event.description.clone().unwrap_or_default(),
                                start_date: edit.new_start.date(),
                                start_time: edit.new_start.time(),
                                end_date: edit.new_end.date(),
                                end_time: edit.new_end.time(),
                                location: edit.event.location.clone().unwrap_or_default(),
                                all_day: edit.event.all_day,
                                status: EventStatus::Confirmed,
                                class: EventClass::Public,
                                priority: edit.event.priority,
                                organizer: edit.event.organizer.as_ref().map(|o| o.cal_address.clone()).unwrap_or_default(),
                                attendees: edit.event.attendees.iter().map(|a| a.cal_address.clone()).collect::<Vec<_>>().join(","),
                                categories: edit.event.categories.join(","),
                                reminder: ReminderType::None,
                                recurrence: RecurrenceType::None, // Single event, no recurrence
                                recurrence_days: vec![false; 7],
                                selected_calendar: edit.event.calendar_path.clone(),
                            };
                            
                            // Create the single event
                            create_callback.emit(event_data);
                        }
                    },
                    RecurringEditAction::FutureEvents => {
                        // Split series and modify future events
                        // 1. Update original series to set UNTIL to end before this occurrence
                        if let Some(update_callback) = &on_event_update {
                            // Find the original series event (not the occurrence)
                            // UIDs like "uuid-timestamp" need to split on the last hyphen, not the first
                            let base_uid = if let Some(last_hyphen_pos) = edit.event.uid.rfind('-') {
                                let suffix = &edit.event.uid[last_hyphen_pos + 1..];
                                // Check if suffix is numeric (timestamp), if so remove it
                                if suffix.chars().all(|c| c.is_numeric()) {
                                    edit.event.uid[..last_hyphen_pos].to_string()
                                } else {
                                    edit.event.uid.clone()
                                }
                            } else {
                                edit.event.uid.clone()
                            };
                            
                            web_sys::console::log_1(&format!("🔍 Looking for original series: '{}' from occurrence: '{}'", base_uid, edit.event.uid).into());
                            
                            // Find the original series event by searching for the base UID
                            let mut original_series = None;
                            for events_list in events.values() {
                                for event in events_list {
                                    if event.uid == base_uid {
                                        original_series = Some(event.clone());
                                        break;
                                    }
                                }
                                if original_series.is_some() {
                                    break;
                                }
                            }
                            
                            let original_series = match original_series {
                                Some(series) => {
                                    web_sys::console::log_1(&format!("✅ Found original series: '{}'", series.uid).into());
                                    series
                                },
                                None => {
                                    web_sys::console::log_1(&format!("⚠️  Could not find original series '{}', using occurrence but fixing UID", base_uid).into());
                                    let mut fallback_event = edit.event.clone();
                                    // Ensure the UID is the base UID, not the occurrence UID
                                    fallback_event.uid = base_uid.clone();
                                    fallback_event
                                }
                            };
                            
                            // Calculate the day before this occurrence for UNTIL clause
                            let until_date = edit.event.dtstart.date_naive() - chrono::Duration::days(1);
                            let until_datetime = until_date.and_time(chrono::NaiveTime::from_hms_opt(23, 59, 59).unwrap());
                            let until_utc = chrono::DateTime::<chrono::Utc>::from_naive_utc_and_offset(until_datetime, chrono::Utc);
                            
                            web_sys::console::log_1(&format!("🔄 Will set UNTIL {} for original series to end before occurrence {}", 
                                until_utc.format("%Y-%m-%d %H:%M:%S UTC"),
                                edit.event.dtstart.format("%Y-%m-%d %H:%M:%S UTC")).into());
                            
                            // Use the original series start time (not the dragged occurrence time)
                            let original_start = original_series.dtstart.with_timezone(&chrono::Local).naive_local();
                            let original_end = original_series.dtend.unwrap_or(original_series.dtstart).with_timezone(&chrono::Local).naive_local();
                            
                            // Send until_date to backend instead of modifying RRULE on frontend
                            update_callback.emit((original_series, original_start, original_end, true, Some(until_utc))); // preserve_rrule = true, backend will add UNTIL
                        }
                        
                        // 2. Create new series starting from this occurrence with modified times
                        if let Some(create_callback) = &on_create_event_request {
                            // Convert the recurring event to EventCreationData for the create callback
                            let event_data = EventCreationData {
                                title: edit.event.summary.clone().unwrap_or_default(),
                                description: edit.event.description.clone().unwrap_or_default(),
                                start_date: edit.new_start.date(),
                                start_time: edit.new_start.time(),
                                end_date: edit.new_end.date(),
                                end_time: edit.new_end.time(),
                                location: edit.event.location.clone().unwrap_or_default(),
                                all_day: edit.event.all_day,
                                status: EventStatus::Confirmed, // Default status
                                class: EventClass::Public, // Default class
                                priority: edit.event.priority,
                                organizer: edit.event.organizer.as_ref().map(|o| o.cal_address.clone()).unwrap_or_default(),
                                attendees: edit.event.attendees.iter().map(|a| a.cal_address.clone()).collect::<Vec<_>>().join(","),
                                categories: edit.event.categories.join(","),
                                reminder: ReminderType::None, // Default reminder
                                recurrence: if let Some(rrule) = &edit.event.rrule {
                                    if rrule.contains("FREQ=DAILY") {
                                        RecurrenceType::Daily
                                    } else if rrule.contains("FREQ=WEEKLY") {
                                        RecurrenceType::Weekly
                                    } else if rrule.contains("FREQ=MONTHLY") {
                                        RecurrenceType::Monthly
                                    } else if rrule.contains("FREQ=YEARLY") {
                                        RecurrenceType::Yearly
                                    } else {
                                        RecurrenceType::None
                                    }
                                } else {
                                    RecurrenceType::None
                                },
                                recurrence_days: vec![false; 7], // Default days
                                selected_calendar: edit.event.calendar_path.clone(),
                            };
                            
                            // Create the new series
                            create_callback.emit(event_data);
                        }
                    },
                    RecurringEditAction::AllEvents => {
                        // Modify the entire series
                        let series_event = edit.event.clone();
                        
                        if let Some(callback) = &on_event_update {
                            callback.emit((series_event, edit.new_start, edit.new_end, true, None)); // Regular drag operation - preserve RRULE, no until_date
                        }
                    },
                }
            }
            pending_recurring_edit.set(None);
        })
    };
    
    let on_recurring_cancel = {
        let pending_recurring_edit = pending_recurring_edit.clone();
        Callback::from(move |_| {
            pending_recurring_edit.set(None);
        })
    };

    html! {
        <div class="week-view-container">
            // Header with weekday names and dates
            <div class="week-header">
                <div class="time-gutter"></div>
                {
                    week_days.iter().map(|date| {
                        let is_today = *date == props.today;
                        let weekday_name = get_weekday_name(date.weekday());
                        
                        html! {
                            <div class={classes!("week-day-header", if is_today { Some("today") } else { None })}>
                                <div class="weekday-name">{weekday_name}</div>
                                <div class="day-number">{date.day()}</div>
                            </div>
                        }
                    }).collect::<Html>()
                }
            </div>
            
            // Scrollable content area with time grid
            <div class="week-content">
                <div class="time-grid">
                    // Time labels
                    <div class="time-labels">
                        {
                            time_labels.iter().enumerate().map(|(index, time)| {
                                let is_final = index == time_labels.len() - 1;
                                html! {
                                    <div class={classes!("time-label", if is_final { Some("final-boundary") } else { None })}>
                                        {time}
                                    </div>
                                }
                            }).collect::<Html>()
                        }
                    </div>
                    
                    // Day columns
                    <div class="week-days-grid">
                        {
                            week_days.iter().enumerate().map(|(_column_index, date)| {
                                let is_today = *date == props.today;
                                let day_events = props.events.get(date).cloned().unwrap_or_default();
                                
                                // Drag event handlers
                                let drag_state_clone = drag_state.clone();
                                let date_for_drag = *date;
                                
                                let onmousedown = {
                                    let drag_state = drag_state_clone.clone();
                                    let context_menus_open = props.context_menus_open;
                                    let time_increment = props.time_increment;
                                    Callback::from(move |e: MouseEvent| {
                                        // Don't start drag if any context menu is open
                                        if context_menus_open {
                                            return;
                                        }
                                        
                                        // Only handle left-click (button 0)
                                        if e.button() != 0 {
                                            return;
                                        }
                                        
                                        // Calculate Y position relative to day column container
                                        // Use layer_y which gives coordinates relative to positioned ancestor
                                        let relative_y = e.layer_y() as f64;
                                        let relative_y = if relative_y > 0.0 { relative_y } else { e.offset_y() as f64 };
                                        
                                        // Snap to increment
                                        let snapped_y = snap_to_increment(relative_y, time_increment);
                                        
                                        drag_state.set(Some(DragState {
                                            is_dragging: true,
                                            drag_type: DragType::CreateEvent,
                                            start_date: date_for_drag,
                                            start_y: snapped_y,
                                            current_y: snapped_y,
                                            offset_y: 0.0,
                                            has_moved: false,
                                        }));
                                        e.prevent_default();
                                    })
                                };
                                
                                let onmousemove = {
                                    let drag_state = drag_state_clone.clone();
                                    let time_increment = props.time_increment;
                                    Callback::from(move |e: MouseEvent| {
                                        if let Some(mut current_drag) = (*drag_state).clone() {
                                            if current_drag.is_dragging {
                                                // Use layer_y for consistent coordinate calculation
                                                let mouse_y = e.layer_y() as f64;
                                                let mouse_y = if mouse_y > 0.0 { mouse_y } else { e.offset_y() as f64 };
                                                
                                                // For move operations, we now follow the mouse directly since we start at click position
                                                // For resize operations, we still use the mouse position directly
                                                let adjusted_y = mouse_y;
                                                
                                                // Snap to increment
                                                let snapped_y = snap_to_increment(adjusted_y, time_increment);
                                                
                                                // Check if we've moved enough to constitute a real drag (5 pixels minimum)
                                                let movement_distance = (snapped_y - current_drag.start_y).abs();
                                                if movement_distance > 5.0 {
                                                    current_drag.has_moved = true;
                                                }
                                                
                                                current_drag.current_y = snapped_y;
                                                drag_state.set(Some(current_drag));
                                            }
                                        }
                                    })
                                };
                                
                                let onmouseup = {
                                    let drag_state = drag_state_clone.clone();
                                    let on_create_event = props.on_create_event.clone();
                                    let on_event_update = props.on_event_update.clone();
                                    let pending_recurring_edit = pending_recurring_edit.clone();
                                    let time_increment = props.time_increment;
                                    Callback::from(move |_e: MouseEvent| {
                                        if let Some(current_drag) = (*drag_state).clone() {
                                            if current_drag.is_dragging && current_drag.has_moved {
                                                match &current_drag.drag_type {
                                                    DragType::CreateEvent => {
                                                        // Calculate start and end times
                                                        let start_time = pixels_to_time(current_drag.start_y);
                                                        let end_time = pixels_to_time(current_drag.current_y);
                                                        
                                                        // Ensure start is before end
                                                        let (actual_start, actual_end) = if start_time <= end_time {
                                                            (start_time, end_time)
                                                        } else {
                                                            (end_time, start_time)
                                                        };
                                                        
                                                        // Ensure minimum duration (15 minutes)
                                                        let actual_end = if actual_end.signed_duration_since(actual_start).num_minutes() < 15 {
                                                            actual_start + chrono::Duration::minutes(15)
                                                        } else {
                                                            actual_end
                                                        };
                                                        
                                                        let start_datetime = NaiveDateTime::new(current_drag.start_date, actual_start);
                                                        let end_datetime = NaiveDateTime::new(current_drag.start_date, actual_end);
                                                        
                                                        if let Some(callback) = &on_create_event {
                                                            callback.emit((current_drag.start_date, start_datetime, end_datetime));
                                                        }
                                                    },
                                                    DragType::MoveEvent(event) => {
                                                        // Calculate new start time based on drag position (accounting for click offset)
                                                        let unsnapped_position = current_drag.current_y - current_drag.offset_y;
                                                        // Snap the final position to maintain time increment alignment
                                                        let event_top_position = snap_to_increment(unsnapped_position, time_increment);
                                                        let new_start_time = pixels_to_time(event_top_position);
                                                        
                                                        // Calculate duration from original event
                                                        let original_duration = if let Some(end) = event.dtend {
                                                            end.signed_duration_since(event.dtstart)
                                                        } else {
                                                            chrono::Duration::hours(1) // Default 1 hour
                                                        };
                                                        
                                                        let new_start_datetime = NaiveDateTime::new(current_drag.start_date, new_start_time);
                                                        let new_end_datetime = new_start_datetime + original_duration;
                                                        
                                                        // Check if this is a recurring event
                                                        if event.rrule.is_some() {
                                                            // Show modal for recurring event modification
                                                            pending_recurring_edit.set(Some(PendingRecurringEdit {
                                                                event: event.clone(),
                                                                new_start: new_start_datetime,
                                                                new_end: new_end_datetime,
                                                            }));
                                                        } else {
                                                            // Regular event - proceed with update
                                                            if let Some(callback) = &on_event_update {
                                                                callback.emit((event.clone(), new_start_datetime, new_end_datetime, true, None)); // Regular drag operation - preserve RRULE, no until_date
                                                            }
                                                        }
                                                    },
                                                    DragType::ResizeEventStart(event) => {
                                                        // Calculate new start time based on drag position
                                                        let new_start_time = pixels_to_time(current_drag.current_y);
                                                        
                                                        // Keep the original end time
                                                        let original_end = if let Some(end) = event.dtend {
                                                            end.with_timezone(&chrono::Local).naive_local()
                                                        } else {
                                                            // If no end time, use start time + 1 hour as default
                                                            event.dtstart.with_timezone(&chrono::Local).naive_local() + chrono::Duration::hours(1)
                                                        };
                                                        
                                                        let new_start_datetime = NaiveDateTime::new(current_drag.start_date, new_start_time);
                                                        
                                                        // Ensure start is before end (minimum 15 minutes)
                                                        let new_end_datetime = if new_start_datetime >= original_end {
                                                            new_start_datetime + chrono::Duration::minutes(15)
                                                        } else {
                                                            original_end
                                                        };
                                                        
                                                        // Check if this is a recurring event
                                                        if event.rrule.is_some() {
                                                            // Show modal for recurring event modification
                                                            pending_recurring_edit.set(Some(PendingRecurringEdit {
                                                                event: event.clone(),
                                                                new_start: new_start_datetime,
                                                                new_end: new_end_datetime,
                                                            }));
                                                        } else {
                                                            // Regular event - proceed with update
                                                            if let Some(callback) = &on_event_update {
                                                                callback.emit((event.clone(), new_start_datetime, new_end_datetime, true, None)); // Regular drag operation - preserve RRULE, no until_date
                                                            }
                                                        }
                                                    },
                                                    DragType::ResizeEventEnd(event) => {
                                                        // Calculate new end time based on drag position
                                                        let new_end_time = pixels_to_time(current_drag.current_y);
                                                        
                                                        // Keep the original start time
                                                        let original_start = event.dtstart.with_timezone(&chrono::Local).naive_local();
                                                        
                                                        let new_end_datetime = NaiveDateTime::new(current_drag.start_date, new_end_time);
                                                        
                                                        // Ensure end is after start (minimum 15 minutes)
                                                        let new_start_datetime = if new_end_datetime <= original_start {
                                                            new_end_datetime - chrono::Duration::minutes(15)
                                                        } else {
                                                            original_start
                                                        };
                                                        
                                                        // Check if this is a recurring event
                                                        if event.rrule.is_some() {
                                                            // Show modal for recurring event modification
                                                            pending_recurring_edit.set(Some(PendingRecurringEdit {
                                                                event: event.clone(),
                                                                new_start: new_start_datetime,
                                                                new_end: new_end_datetime,
                                                            }));
                                                        } else {
                                                            // Regular event - proceed with update
                                                            if let Some(callback) = &on_event_update {
                                                                callback.emit((event.clone(), new_start_datetime, new_end_datetime, true, None)); // Regular drag operation - preserve RRULE, no until_date
                                                            }
                                                        }
                                                    }
                                                }
                                                
                                                drag_state.set(None);
                                            }
                                        }
                                    })
                                };
                                
                                html! {
                                    <div 
                                        class={classes!("week-day-column", if is_today { Some("today") } else { None })}
                                        {onmousedown}
                                        {onmousemove}
                                        {onmouseup}
                                    >
                                        // Time slot backgrounds - 24 hour slots to represent full day
                                        {
                                            (0..24).map(|_hour| {
                                                html! {
                                                    <div class="time-slot">
                                                        <div class="time-slot-half"></div>
                                                        <div class="time-slot-half"></div>
                                                    </div>
                                                }
                                            }).collect::<Html>()
                                        }
                                        // Final boundary slot to complete the 24-hour visual grid - make it interactive like other slots
                                        <div class="time-slot boundary-slot">
                                            <div class="time-slot-half"></div>
                                            <div class="time-slot-half"></div>
                                        </div>
                                        
                                        // Events positioned absolutely based on their actual times
                                        <div class="events-container">
                                            {
                                                day_events.iter().filter_map(|event| {
                                                    let (start_pixels, duration_pixels, is_all_day) = calculate_event_position(event, *date);
                                                    
                                                    // Skip events that don't belong on this date or have invalid positioning
                                                    if start_pixels == 0.0 && duration_pixels == 0.0 && !is_all_day {
                                                        return None;
                                                    }
                                                    
                                                    let event_color = get_event_color(event);
                                                    let is_refreshing = props.refreshing_event_uid.as_ref() == Some(&event.uid);
                                                    
                                                    let onclick = {
                                                        let on_event_click = props.on_event_click.clone();
                                                        let event = event.clone();
                                                        Callback::from(move |e: MouseEvent| {
                                                            e.stop_propagation(); // Prevent calendar click events from also triggering
                                                            on_event_click.emit(event.clone());
                                                        })
                                                    };
                                                    
                                                    let onmousedown_event = {
                                                        let drag_state = drag_state.clone();
                                                        let event_for_drag = event.clone();
                                                        let date_for_drag = *date;
                                                        let _time_increment = props.time_increment;
                                                        Callback::from(move |e: MouseEvent| {
                                                            e.stop_propagation(); // Prevent drag-to-create from starting on event clicks
                                                            
                                                            // Only handle left-click (button 0) for moving
                                                            if e.button() != 0 {
                                                                return;
                                                            }
                                                            
                                                            // Calculate click position relative to event element
                                                            let click_y_relative = e.layer_y() as f64;
                                                            let click_y_relative = if click_y_relative > 0.0 { click_y_relative } else { e.offset_y() as f64 };
                                                            
                                                            // Get event's current position in day column coordinates
                                                            let (event_start_pixels, _, _) = calculate_event_position(&event_for_drag, date_for_drag);
                                                            let event_start_pixels = event_start_pixels as f64;
                                                            
                                                            // Convert click position to day column coordinates
                                                            let click_y = event_start_pixels + click_y_relative;
                                                            
                                                            // Store the offset from the event's top where the user clicked
                                                            // This will be used to maintain the relative click position
                                                            let offset_y = click_y_relative;
                                                            
                                                            // Start drag tracking from where we clicked (in day column coordinates)
                                                            drag_state.set(Some(DragState {
                                                                is_dragging: true,
                                                                drag_type: DragType::MoveEvent(event_for_drag.clone()),
                                                                start_date: date_for_drag,
                                                                start_y: click_y,
                                                                current_y: click_y,
                                                                offset_y,
                                                                has_moved: false,
                                                            }));
                                                            e.prevent_default();
                                                        })
                                                    };
                                                    
                                                    let oncontextmenu = {
                                                        if let Some(callback) = &props.on_event_context_menu {
                                                            let callback = callback.clone();
                                                            let event = event.clone();
                                                            let drag_state_for_context = drag_state.clone();
                                                            Some(Callback::from(move |e: web_sys::MouseEvent| {
                                                                // Check if we're currently dragging - if so, prevent context menu
                                                                if let Some(drag) = (*drag_state_for_context).clone() {
                                                                    if drag.is_dragging {
                                                                        e.prevent_default();
                                                                        return;
                                                                    }
                                                                }
                                                                
                                                                e.prevent_default();
                                                                e.stop_propagation(); // Prevent calendar context menu from also triggering
                                                                callback.emit((e, event.clone()));
                                                            }))
                                                        } else {
                                                            None
                                                        }
                                                    };
                                                    
                                                    // Format time display for the event
                                                    let time_display = if event.all_day {
                                                        "All Day".to_string()
                                                    } else {
                                                        let local_start = event.dtstart.with_timezone(&Local);
                                                        if let Some(end) = event.dtend {
                                                            let local_end = end.with_timezone(&Local);
                                                            
                                                            // Check if both times are in same AM/PM period to avoid redundancy
                                                            let start_is_am = local_start.hour() < 12;
                                                            let end_is_am = local_end.hour() < 12;
                                                            
                                                            if start_is_am == end_is_am {
                                                                // Same AM/PM period - show "9:00 - 10:30 AM"
                                                                format!("{} - {}", 
                                                                    local_start.format("%I:%M").to_string().trim_start_matches('0'),
                                                                    local_end.format("%I:%M %p")
                                                                )
                                                            } else {
                                                                // Different AM/PM periods - show "9:00 AM - 2:30 PM"
                                                                format!("{} - {}", 
                                                                    local_start.format("%I:%M %p"),
                                                                    local_end.format("%I:%M %p")
                                                                )
                                                            }
                                                        } else {
                                                            // No end time, just show start time
                                                            format!("{}", local_start.format("%I:%M %p"))
                                                        }
                                                    };
                                                    
                                                    // Check if this event is currently being dragged or resized
                                                    let is_being_dragged = if let Some(drag) = (*drag_state).clone() {
                                                        match &drag.drag_type {
                                                            DragType::MoveEvent(dragged_event) => 
                                                                dragged_event.uid == event.uid && drag.is_dragging,
                                                            DragType::ResizeEventStart(dragged_event) => 
                                                                dragged_event.uid == event.uid && drag.is_dragging,
                                                            DragType::ResizeEventEnd(dragged_event) => 
                                                                dragged_event.uid == event.uid && drag.is_dragging,
                                                            _ => false,
                                                        }
                                                    } else {
                                                        false
                                                    };
                                                    
                                                    if is_being_dragged {
                                                        // Hide the original event while being dragged
                                                        Some(html! {})
                                                    } else {
                                                        // Create resize handles for left-click resize
                                                        let resize_start_handler = {
                                                            let drag_state = drag_state.clone();
                                                            let event_for_resize = event.clone();
                                                            let date_for_drag = *date;
                                                            let time_increment = props.time_increment;
                                                            Callback::from(move |e: web_sys::MouseEvent| {
                                                                e.stop_propagation();
                                                                
                                                                let relative_y = e.layer_y() as f64;
                                                                let relative_y = if relative_y > 0.0 { relative_y } else { e.offset_y() as f64 };
                                                                let snapped_y = snap_to_increment(relative_y, time_increment);
                                                                
                                                                drag_state.set(Some(DragState {
                                                                    is_dragging: true,
                                                                    drag_type: DragType::ResizeEventStart(event_for_resize.clone()),
                                                                    start_date: date_for_drag,
                                                                    start_y: snapped_y,
                                                                    current_y: snapped_y,
                                                                    offset_y: 0.0,
                                                                    has_moved: false,
                                                                }));
                                                                e.prevent_default();
                                                            })
                                                        };
                                                        
                                                        let resize_end_handler = {
                                                            let drag_state = drag_state.clone();
                                                            let event_for_resize = event.clone();
                                                            let date_for_drag = *date;
                                                            let time_increment = props.time_increment;
                                                            Callback::from(move |e: web_sys::MouseEvent| {
                                                                e.stop_propagation();
                                                                
                                                                let relative_y = e.layer_y() as f64;
                                                                let relative_y = if relative_y > 0.0 { relative_y } else { e.offset_y() as f64 };
                                                                let snapped_y = snap_to_increment(relative_y, time_increment);
                                                                
                                                                drag_state.set(Some(DragState {
                                                                    is_dragging: true,
                                                                    drag_type: DragType::ResizeEventEnd(event_for_resize.clone()),
                                                                    start_date: date_for_drag,
                                                                    start_y: snapped_y,
                                                                    current_y: snapped_y,
                                                                    offset_y: 0.0,
                                                                    has_moved: false,
                                                                }));
                                                                e.prevent_default();
                                                            })
                                                        };
                                                        
                                                        Some(html! {
                                                            <div 
                                                                class={classes!(
                                                                    "week-event", 
                                                                    if is_refreshing { Some("refreshing") } else { None },
                                                                    if is_all_day { Some("all-day") } else { None }
                                                                )}
                                                                style={format!(
                                                                    "background-color: {}; top: {}px; height: {}px;", 
                                                                    event_color, 
                                                                    start_pixels, 
                                                                    duration_pixels
                                                                )}
                                                                {onclick}
                                                                {oncontextmenu}
                                                                onmousedown={onmousedown_event}
                                                            >
                                                                // Top resize handle
                                                                {if !is_all_day {
                                                                    html! {
                                                                        <div 
                                                                            class="resize-handle resize-handle-top"
                                                                            onmousedown={resize_start_handler}
                                                                        />
                                                                    }
                                                                } else {
                                                                    html! {}
                                                                }}
                                                                
                                                                // Event content
                                                                <div class="event-content">
                                                                    <div class="event-title">{event.summary.as_ref().unwrap_or(&"Untitled".to_string())}</div>
                                                                    {if !is_all_day {
                                                                        html! { <div class="event-time">{time_display}</div> }
                                                                    } else {
                                                                        html! {}
                                                                    }}
                                                                </div>
                                                                
                                                                // Bottom resize handle
                                                                {if !is_all_day {
                                                                    html! {
                                                                        <div 
                                                                            class="resize-handle resize-handle-bottom"
                                                                            onmousedown={resize_end_handler}
                                                                        />
                                                                    }
                                                                } else {
                                                                    html! {}
                                                                }}
                                                            </div>
                                                        })
                                                    }
                                                }).collect::<Html>()
                                            }
                                        </div>
                                        
                                        // Temporary event box during drag
                                        {
                                            if let Some(drag) = (*drag_state).clone() {
                                                if drag.is_dragging && drag.start_date == *date {
                                                    match &drag.drag_type {
                                                        DragType::CreateEvent => {
                                                            let start_y = drag.start_y.min(drag.current_y);
                                                            let end_y = drag.start_y.max(drag.current_y);
                                                            let height = (drag.current_y - drag.start_y).abs().max(20.0);
                                                            
                                                            // Convert pixels to times for display
                                                            let start_time = pixels_to_time(start_y);
                                                            let end_time = pixels_to_time(end_y);
                                                            
                                                            html! {
                                                                <div
                                                                    class="temp-event-box"
                                                                    style={format!("top: {}px; height: {}px;", start_y, height)}
                                                                >
                                                                    {format!("{} - {}", start_time.format("%I:%M %p"), end_time.format("%I:%M %p"))}
                                                                </div>
                                                            }
                                                        },
                                                        DragType::MoveEvent(event) => {
                                                            // Calculate the event's new position accounting for click offset
                                                            let unsnapped_position = drag.current_y - drag.offset_y;
                                                            // Snap the final position to maintain time increment alignment
                                                            let preview_position = snap_to_increment(unsnapped_position, props.time_increment);
                                                            let new_start_time = pixels_to_time(preview_position);
                                                            let original_duration = if let Some(end) = event.dtend {
                                                                end.signed_duration_since(event.dtstart)
                                                            } else {
                                                                chrono::Duration::hours(1)
                                                            };
                                                            let duration_pixels = (original_duration.num_minutes() as f64).max(20.0);
                                                            let new_end_time = new_start_time + original_duration;
                                                            
                                                            let event_color = get_event_color(event);
                                                            
                                                            html! {
                                                                <div
                                                                    class="temp-event-box moving-event"
                                                                    style={format!("top: {}px; height: {}px; background-color: {}; opacity: 0.7;", preview_position, duration_pixels, event_color)}
                                                                >
                                                                    <div class="event-title">{event.summary.as_ref().unwrap_or(&"Untitled".to_string())}</div>
                                                                    <div class="event-time">{format!("{} - {}", new_start_time.format("%I:%M %p"), new_end_time.format("%I:%M %p"))}</div>
                                                                </div>
                                                            }
                                                        },
                                                        DragType::ResizeEventStart(event) => {
                                                            // Show the event being resized from the start
                                                            let new_start_time = pixels_to_time(drag.current_y);
                                                            let original_end = if let Some(end) = event.dtend {
                                                                end.with_timezone(&chrono::Local).naive_local()
                                                            } else {
                                                                event.dtstart.with_timezone(&chrono::Local).naive_local() + chrono::Duration::hours(1)
                                                            };
                                                            
                                                            // Calculate positions for the preview
                                                            let (original_start_pixels, _, _) = calculate_event_position(event, drag.start_date);
                                                            let original_duration = original_end.signed_duration_since(event.dtstart.with_timezone(&chrono::Local).naive_local());
                                                            let original_end_pixels = original_start_pixels + (original_duration.num_minutes() as f32);
                                                            
                                                            let new_start_pixels = drag.current_y;
                                                            let new_height = (original_end_pixels as f64 - new_start_pixels).max(20.0);
                                                            
                                                            let event_color = get_event_color(event);
                                                            
                                                            html! {
                                                                <div
                                                                    class="temp-event-box resizing-event"
                                                                    style={format!("top: {}px; height: {}px; background-color: {}; opacity: 0.7;", new_start_pixels, new_height, event_color)}
                                                                >
                                                                    <div class="event-title">{event.summary.as_ref().unwrap_or(&"Untitled".to_string())}</div>
                                                                    <div class="event-time">{format!("{} - {}", new_start_time.format("%I:%M %p"), original_end.time().format("%I:%M %p"))}</div>
                                                                </div>
                                                            }
                                                        },
                                                        DragType::ResizeEventEnd(event) => {
                                                            // Show the event being resized from the end
                                                            let new_end_time = pixels_to_time(drag.current_y);
                                                            let original_start = event.dtstart.with_timezone(&chrono::Local).naive_local();
                                                            
                                                            // Calculate positions for the preview
                                                            let (original_start_pixels, _, _) = calculate_event_position(event, drag.start_date);
                                                            
                                                            let new_end_pixels = drag.current_y;
                                                            let new_height = (new_end_pixels - original_start_pixels as f64).max(20.0);
                                                            
                                                            let event_color = get_event_color(event);
                                                            
                                                            html! {
                                                                <div
                                                                    class="temp-event-box resizing-event"
                                                                    style={format!("top: {}px; height: {}px; background-color: {}; opacity: 0.7;", original_start_pixels, new_height, event_color)}
                                                                >
                                                                    <div class="event-title">{event.summary.as_ref().unwrap_or(&"Untitled".to_string())}</div>
                                                                    <div class="event-time">{format!("{} - {}", original_start.time().format("%I:%M %p"), new_end_time.format("%I:%M %p"))}</div>
                                                                </div>
                                                            }
                                                        }
                                                    }
                                                } else {
                                                    html! {}
                                                }
                                            } else {
                                                html! {}
                                            }
                                        }
                                    </div>
                                }
                            }).collect::<Html>()
                        }
                    </div>
                </div>
            </div>
            
            // Recurring event modification modal
            if let Some(edit) = (*pending_recurring_edit).clone() {
                <RecurringEditModal 
                    show={true}
                    event={edit.event}
                    new_start={edit.new_start}
                    new_end={edit.new_end}
                    on_choice={on_recurring_choice}
                    on_cancel={on_recurring_cancel}
                />
            } else {
                <></>
            }
        </div>
    }
}

fn get_start_of_week(date: NaiveDate) -> NaiveDate {
    let weekday = date.weekday();
    let days_from_sunday = match weekday {
        Weekday::Sun => 0,
        Weekday::Mon => 1,
        Weekday::Tue => 2,
        Weekday::Wed => 3,
        Weekday::Thu => 4,
        Weekday::Fri => 5,
        Weekday::Sat => 6,
    };
    date - Duration::days(days_from_sunday)
}

fn get_weekday_name(weekday: Weekday) -> &'static str {
    match weekday {
        Weekday::Sun => "Sun",
        Weekday::Mon => "Mon",
        Weekday::Tue => "Tue",
        Weekday::Wed => "Wed",
        Weekday::Thu => "Thu",
        Weekday::Fri => "Fri",
        Weekday::Sat => "Sat",
    }
}

// Calculate the pixel position of an event based on its time
// Each hour is 60px, so we convert time to pixels
// Snap pixel position to 15-minute increments (15px = 15 minutes since 60px = 60 minutes)
fn snap_to_increment(pixels: f64, increment: u32) -> f64 {
    let increment_px = increment as f64; // Convert to pixels (1px = 1 minute)
    (pixels / increment_px).round() * increment_px
}

// Convert pixel position to time (inverse of time to pixels)
fn pixels_to_time(pixels: f64) -> NaiveTime {
    // Since 60px = 1 hour, pixels directly represent minutes
    let total_minutes = pixels; // 1px = 1 minute
    let hours = (total_minutes / 60.0) as u32;
    let minutes = (total_minutes % 60.0) as u32;
    
    // Handle midnight boundary - if we're at exactly 1440 pixels (24:00), return midnight
    if total_minutes >= 1440.0 {
        return NaiveTime::from_hms_opt(0, 0, 0).unwrap();
    }
    
    // Clamp to valid time range for within-day times
    let hours = hours.min(23);
    let minutes = minutes.min(59);
    
    NaiveTime::from_hms_opt(hours, minutes, 0).unwrap_or(NaiveTime::from_hms_opt(0, 0, 0).unwrap())
}


fn calculate_event_position(event: &VEvent, date: NaiveDate) -> (f32, f32, bool) {
    // Convert UTC times to local time for display
    let local_start = event.dtstart.with_timezone(&Local);
    let event_date = local_start.date_naive();
    
    // Only position events that are on this specific date
    if event_date != date {
        return (0.0, 0.0, false); // Event not on this date
    }
    
    // Handle all-day events - they appear at the top
    if event.all_day {
        return (0.0, 30.0, true); // Position at top, 30px height, is_all_day = true
    }
    
    // Calculate start position in pixels from midnight
    let start_hour = local_start.hour() as f32;
    let start_minute = local_start.minute() as f32;
    let start_pixels = (start_hour + start_minute / 60.0) * 60.0; // 60px per hour
    
    
    // Calculate duration and height
    let duration_pixels = if let Some(end) = event.dtend {
        let local_end = end.with_timezone(&Local);
        let end_date = local_end.date_naive();
        
        // Handle events that span multiple days by capping at midnight
        if end_date > date {
            // Event continues past midnight, cap at 24:00 (1440px)
            1440.0 - start_pixels
        } else {
            let end_hour = local_end.hour() as f32;
            let end_minute = local_end.minute() as f32;
            let end_pixels = (end_hour + end_minute / 60.0) * 60.0;
            (end_pixels - start_pixels).max(20.0) // Minimum 20px height
        }
    } else {
        60.0 // Default 1 hour if no end time
    };
    
    (start_pixels, duration_pixels, false) // is_all_day = false
}