import { Page, expect, Locator, TestInfo } from '@playwright/test';

export class CalendarHelpers {
  constructor(private page: Page) {}

  async waitForCalendarLoad() {
    // Wait for calendar to be visible (either month view grid or week view container)
    await expect(
      this.page.locator('.calendar-grid').or(this.page.locator('.week-view-container'))
    ).toBeVisible({ timeout: 5000 });
    
    // Wait for any loading spinners to disappear (optional, may not exist)
    try {
      await this.page.waitForSelector('.calendar-loading', { state: 'hidden', timeout: 2000 });
    } catch {
      // Loading spinner might not exist, that's ok
    }
  }

  async switchToWeekView() {
    await this.page.selectOption('.view-selector-dropdown', 'week');
    await this.waitForCalendarLoad();
  }

  async switchToMonthView() {
    await this.page.selectOption('.view-selector-dropdown', 'month');
    await this.waitForCalendarLoad();
  }

  async getCurrentView(): Promise<'week' | 'month'> {
    const selectedValue = await this.page.locator('.view-selector-dropdown').inputValue();
    return selectedValue as 'week' | 'month';
  }

  async navigateToNextPeriod() {
    await this.page.getByRole('button', { name: '›' }).click();
    await this.waitForCalendarLoad();
  }

  async navigateToPreviousPeriod() {
    await this.page.getByRole('button', { name: '‹' }).click();
    await this.waitForCalendarLoad();
  }

  async navigateToToday() {
    await this.page.getByRole('button', { name: 'Today' }).click();
    await this.waitForCalendarLoad();
  }

  async openCreateEventModal(timeSlot?: string) {
    // Check if we're in week view or month view to determine creation method
    const isWeekView = await this.page.locator('.week-view-container').count() > 0;
    
    if (isWeekView) {
      // In week view, try element-based drag first (simpler and more reliable)
      const timeSlots = this.page.locator('.time-slot');
      if (await timeSlots.count() > 1) {
        const startSlot = timeSlots.first();
        const endSlot = timeSlots.nth(2); // Skip one to create a longer event
        
        // Force the drag
        await startSlot.dragTo(endSlot, { force: true });
        
        // Wait for the create event modal to appear
        await expect(this.page.locator('.create-event-modal, .modal')).toBeVisible({ timeout: 5000 });
      } else {
        throw new Error('Not enough time slots available for drag-to-create event');
      }
    } else {
      // In month view, try right-clicking on calendar day
      const calendarDay = this.page.locator('.calendar-day').first();
      if (await calendarDay.count() > 0) {
        await calendarDay.click({ button: 'right' });
        
        // Wait for context menu to appear
        await expect(this.page.locator('.context-menu, .calendar-context-menu')).toBeVisible({ timeout: 3000 });
        
        // Click "Create Event" in the context menu
        const createEventOption = this.page.getByText(/create event/i);
        await expect(createEventOption).toBeVisible();
        await createEventOption.click();
        
        // Wait for the create event modal to appear
        await expect(this.page.locator('.create-event-modal, .modal')).toBeVisible({ timeout: 5000 });
      } else {
        throw new Error('Could not find calendar day for event creation in month view');
      }
    }
  }

  async createEvent(eventData: {
    title: string;
    startTime?: string;
    endTime?: string;
    description?: string;
    calendar?: string;
  }, testInfo?: TestInfo) {
    // Open modal by clicking on calendar (using default 14:00 time slot if available)
    await this.openCreateEventModal(eventData.startTime || '14:00');
    
    // Fill in event details - use exact label match
    const titleInput = this.page.getByLabel('Event Title *').or(this.page.locator('#event-title'));
    await titleInput.fill(eventData.title);
    const titleScreenshot = await this.page.screenshot({ fullPage: true });
    if (testInfo) await testInfo.attach('debug-after-title-fill.png', { body: titleScreenshot, contentType: 'image/png' });
    
    if (eventData.startTime) {
      const startTimeInput = this.page.locator('#start-time');
      await startTimeInput.fill(eventData.startTime);
      const startTimeScreenshot = await this.page.screenshot({ fullPage: true });
      if (testInfo) await testInfo.attach('debug-after-start-time-fill.png', { body: startTimeScreenshot, contentType: 'image/png' });
    }
    
    if (eventData.endTime) {
      const endTimeInput = this.page.locator('#end-time');
      await endTimeInput.fill(eventData.endTime);
      const endTimeScreenshot = await this.page.screenshot({ fullPage: true });
      if (testInfo) await testInfo.attach('debug-after-end-time-fill.png', { body: endTimeScreenshot, contentType: 'image/png' });
    }
    
    if (eventData.description) {
      const descInput = this.page.getByLabel('Description').or(this.page.getByLabel('Notes'));
      await descInput.fill(eventData.description);
    }
    
    if (eventData.calendar) {
      await this.page.selectOption('[name="calendar"], .calendar-select', eventData.calendar);
    }
    
    // Submit the form
    const submitButton = this.page.getByRole('button', { name: 'Create Event' })
      .or(this.page.getByRole('button', { name: 'Save' }))
      .or(this.page.getByRole('button', { name: 'Create' }));
    
    // Take screenshot before clicking submit button
    const beforeSubmitScreenshot = await this.page.screenshot({ fullPage: true });
    if (testInfo) await testInfo.attach('debug-before-submit-click.png', { body: beforeSubmitScreenshot, contentType: 'image/png' });
    
    // Wait for button to be visible and click with force (since normal click times out)
    await expect(submitButton).toBeVisible({ timeout: 5000 });
    await this.page.waitForTimeout(500); // Give form time to stabilize
    await submitButton.click({ force: true });
    
    // Wait for modal to close
    await expect(this.page.locator('.create-event-modal, .modal')).toBeHidden({ timeout: 10000 });
    
    // Take screenshot after modal closes
    const afterCloseScreenshot = await this.page.screenshot({ fullPage: true });
    if (testInfo) await testInfo.attach('debug-after-modal-close.png', { body: afterCloseScreenshot, contentType: 'image/png' });
    
    // Wait for calendar to update
    await this.page.waitForTimeout(2000);
    await this.waitForCalendarLoad();
    
    // Refresh the calendar data if needed
    try {
      const refreshButton = this.page.locator('button').filter({ hasText: /refresh|reload/i });
      if (await refreshButton.count() > 0) {
        await refreshButton.click();
        await this.waitForCalendarLoad();
      }
    } catch {
      // Refresh button doesn't exist, that's ok
    }
  }

  async getEventByTitle(title: string): Promise<Locator> {
    // Check current view to use appropriate selector
    const isWeekView = await this.page.locator('.week-view-container').count() > 0;
    
    if (isWeekView) {
      // In week view, events use .week-event class, and text is in .event-title
      return this.page.locator('.week-event').filter({ hasText: title });
    } else {
      // In month view, check for different possible selectors
      return this.page.locator('.month-event, .calendar-event').filter({ hasText: title });
    }
  }

  async dragEventToNewTime(eventTitle: string, targetTimeSlot: string) {
    const event = await this.getEventByTitle(eventTitle);
    const target = this.page.locator(`[data-time="${targetTimeSlot}"]`);
    
    await event.dragTo(target);
    await this.waitForCalendarLoad();
  }

  async openCalendarManagementModal() {
    await this.page.getByRole('button', { name: '+ Add Calendar' }).click();
    await expect(this.page.locator('.calendar-management-modal')).toBeVisible();
  }

  async createCalendar(calendarData: {
    name: string;
    color?: string;
    type: 'caldav' | 'external';
    url?: string;
  }) {
    await this.openCalendarManagementModal();
    
    // Switch to appropriate tab
    if (calendarData.type === 'caldav') {
      await this.page.locator('.tab-button', { hasText: 'Create Calendar' }).click();
    } else {
      await this.page.locator('.tab-button', { hasText: 'Add External' }).click();
    }
    
    // Fill in calendar details
    await this.page.getByLabel('Calendar Name').fill(calendarData.name);
    
    if (calendarData.url) {
      await this.page.getByLabel('Calendar URL').fill(calendarData.url);
    }
    
    if (calendarData.color) {
      // Click color picker and select color
      await this.page.locator('.color-picker').getByTestId(calendarData.color).click();
    }
    
    // Submit the form
    const buttonText = calendarData.type === 'caldav' ? 'Create Calendar' : 'Add External Calendar';
    await this.page.getByRole('button', { name: buttonText }).click();
    
    // Wait for modal to close
    await expect(this.page.locator('.calendar-management-modal')).toBeHidden();
  }

  async toggleCalendarVisibility(calendarName: string) {
    // Look for the calendar in regular calendar list first, then external
    const regularCalendarItem = this.page.locator('.calendar-list li').filter({ hasText: calendarName });
    const externalCalendarItem = this.page.locator('.external-calendar-item').filter({ hasText: calendarName });
    
    if (await regularCalendarItem.count() > 0) {
      await regularCalendarItem.locator('input[type="checkbox"]').click();
    } else if (await externalCalendarItem.count() > 0) {
      await externalCalendarItem.locator('input[type="checkbox"]').click();
    }
    
    await this.waitForCalendarLoad();
  }

  async changeTheme(theme: string) {
    await this.page.selectOption('.theme-selector-dropdown', theme);
    
    // Wait for theme to apply
    await this.page.waitForTimeout(500);
  }

  async changeStyle(style: string) {
    await this.page.selectOption('.style-selector-dropdown', style);
    
    // Wait for style to apply
    await this.page.waitForTimeout(500);
  }

  async deleteEvent(eventTitle: string) {
    const event = await this.getEventByTitle(eventTitle);
    await expect(event).toBeVisible({ timeout: 5000 });
    
    // Right-click to open context menu
    await event.click({ button: 'right' });
    
    // Wait for context menu and click delete
    const deleteOption = this.page.getByText(/delete|remove/i);
    await expect(deleteOption).toBeVisible({ timeout: 3000 });
    await deleteOption.click();
    
    // Confirm deletion if there's a confirmation dialog
    const confirmButton = this.page.getByRole('button', { name: /delete|confirm|yes/i });
    if (await confirmButton.count() > 0) {
      await confirmButton.click();
    }
    
    // Wait for the event to be removed
    await expect(event).toBeHidden({ timeout: 5000 });
    await this.waitForCalendarLoad();
  }
}