use web_sys::HtmlInputElement;
use web_sys::HtmlSelectElement;
use yew::prelude::*;

use crate::api;
use crate::types::*;

enum SearchResults {
    None,
    Artists(Vec<ArtistResult>),
    Albums(Vec<AlbumResult>),
    Tracks(Vec<TrackResult>),
}

#[function_component(SearchPage)]
pub fn search_page() -> Html {
    let query = use_state(|| String::new());
    let search_type = use_state(|| "artist".to_string());
    let results = use_state(|| SearchResults::None);
    let error = use_state(|| None::<String>);
    let message = use_state(|| None::<String>);

    let on_search = {
        let query = query.clone();
        let search_type = search_type.clone();
        let results = results.clone();
        let error = error.clone();
        Callback::from(move |e: SubmitEvent| {
            e.prevent_default();
            let q = (*query).clone();
            let st = (*search_type).clone();
            let results = results.clone();
            let error = error.clone();
            wasm_bindgen_futures::spawn_local(async move {
                error.set(None);
                match st.as_str() {
                    "artist" => match api::search_artist(&q, 10).await {
                        Ok(r) => results.set(SearchResults::Artists(r)),
                        Err(e) => error.set(Some(e.0)),
                    },
                    "album" => match api::search_album(&q, None, 10).await {
                        Ok(r) => results.set(SearchResults::Albums(r)),
                        Err(e) => error.set(Some(e.0)),
                    },
                    "track" => match api::search_track(&q, None, 10).await {
                        Ok(r) => results.set(SearchResults::Tracks(r)),
                        Err(e) => error.set(Some(e.0)),
                    },
                    _ => {}
                }
            });
        })
    };

    let on_add_artist = {
        let message = message.clone();
        let error = error.clone();
        move |name: String, mbid: String| {
            let message = message.clone();
            let error = error.clone();
            wasm_bindgen_futures::spawn_local(async move {
                match api::add_artist(&name, Some(&mbid)).await {
                    Ok(s) => message.set(Some(format!(
                        "Added {} tracks ({} already owned)",
                        s.tracks_added, s.tracks_already_owned
                    ))),
                    Err(e) => error.set(Some(e.0)),
                }
            });
        }
    };

    let on_add_album = {
        let message = message.clone();
        let error = error.clone();
        move |artist: String, title: String, mbid: String| {
            let message = message.clone();
            let error = error.clone();
            wasm_bindgen_futures::spawn_local(async move {
                match api::add_album(&artist, &title, Some(&mbid)).await {
                    Ok(s) => message.set(Some(format!(
                        "Added {} tracks ({} already owned)",
                        s.tracks_added, s.tracks_already_owned
                    ))),
                    Err(e) => error.set(Some(e.0)),
                }
            });
        }
    };

    html! {
        <div>
            <div class="page-header">
                <h2>{ "Search" }</h2>
                <p>{ "Find music on MusicBrainz and add to your library" }</p>
            </div>

            <form onsubmit={on_search}>
                <div class="search-bar">
                    <input
                        type="text"
                        placeholder="Search..."
                        value={(*query).clone()}
                        oninput={let q = query.clone(); Callback::from(move |e: InputEvent| {
                            let input: HtmlInputElement = e.target_unchecked_into();
                            q.set(input.value());
                        })}
                    />
                    <select onchange={let st = search_type.clone(); Callback::from(move |e: Event| {
                        let select: HtmlSelectElement = e.target_unchecked_into();
                        st.set(select.value());
                    })}>
                        <option value="artist" selected=true>{ "Artist" }</option>
                        <option value="album">{ "Album" }</option>
                        <option value="track">{ "Track" }</option>
                    </select>
                    <button type="submit" class="btn btn-primary">{ "Search" }</button>
                </div>
            </form>

            if let Some(ref msg) = *message {
                <div class="card" style="border-color: var(--success);">
                    <p>{ msg }</p>
                </div>
            }
            if let Some(ref err) = *error {
                <div class="card error">{ err }</div>
            }

            { match &*results {
                SearchResults::None => html! {},
                SearchResults::Artists(items) => html! {
                    <table>
                        <thead>
                            <tr><th>{ "Name" }</th><th>{ "Country" }</th><th>{ "Type" }</th><th>{ "Score" }</th><th></th></tr>
                        </thead>
                        <tbody>
                            { for items.iter().map(|a| {
                                let name = a.name.clone();
                                let mbid = a.id.clone();
                                let on_add = on_add_artist.clone();
                                html! {
                                    <tr>
                                        <td>
                                            { &a.name }
                                            if let Some(ref d) = a.disambiguation {
                                                <span class="text-muted text-sm">{ format!(" ({d})") }</span>
                                            }
                                        </td>
                                        <td>{ a.country.as_deref().unwrap_or("") }</td>
                                        <td>{ a.artist_type.as_deref().unwrap_or("") }</td>
                                        <td>{ a.score }</td>
                                        <td>
                                            <button class="btn btn-sm btn-success"
                                                onclick={Callback::from(move |_| on_add(name.clone(), mbid.clone()))}>
                                                { "Add" }
                                            </button>
                                        </td>
                                    </tr>
                                }
                            })}
                        </tbody>
                    </table>
                },
                SearchResults::Albums(items) => html! {
                    <table>
                        <thead>
                            <tr><th>{ "Title" }</th><th>{ "Artist" }</th><th>{ "Year" }</th><th>{ "Score" }</th><th></th></tr>
                        </thead>
                        <tbody>
                            { for items.iter().map(|a| {
                                let artist = a.artist.clone();
                                let title = a.title.clone();
                                let mbid = a.id.clone();
                                let on_add = on_add_album.clone();
                                html! {
                                    <tr>
                                        <td>{ &a.title }</td>
                                        <td>{ &a.artist }</td>
                                        <td>{ a.year.as_deref().unwrap_or("") }</td>
                                        <td>{ a.score }</td>
                                        <td>
                                            <button class="btn btn-sm btn-success"
                                                onclick={Callback::from(move |_| on_add(artist.clone(), title.clone(), mbid.clone()))}>
                                                { "Add" }
                                            </button>
                                        </td>
                                    </tr>
                                }
                            })}
                        </tbody>
                    </table>
                },
                SearchResults::Tracks(items) => html! {
                    <table>
                        <thead>
                            <tr><th>{ "Title" }</th><th>{ "Artist" }</th><th>{ "Album" }</th><th>{ "Score" }</th></tr>
                        </thead>
                        <tbody>
                            { for items.iter().map(|t| html! {
                                <tr>
                                    <td>{ &t.title }</td>
                                    <td>{ &t.artist }</td>
                                    <td>{ t.album.as_deref().unwrap_or("") }</td>
                                    <td>{ t.score }</td>
                                </tr>
                            })}
                        </tbody>
                    </table>
                },
            }}
        </div>
    }
}