//
//  MovieDetailView.swift
//  LuminateUI
//
//  Created by Brendan Szymanski on 6/5/26.
//

@preconcurrency import Adwaita
import Foundation
import LuminateCore

struct MovieDetailView: View {

    var item: Components.Schemas.BaseItemDto
    var client: JellyfinClient
    var userId: String
    @State private nonisolated(unsafe) var isFavorite: Bool
    @State private nonisolated(unsafe) var isPlayed: Bool
    @State private nonisolated(unsafe) var similarItems: [Components.Schemas.BaseItemDto] = []
    @State private nonisolated(unsafe) var backdropData: Data?

    init(item: Components.Schemas.BaseItemDto, client: JellyfinClient, userId: String) {
        self.item = item
        self.client = client
        self.userId = userId
        _isFavorite = .init(wrappedValue: item.userData?.value1.isFavorite ?? false)
        _isPlayed = .init(wrappedValue: item.userData?.value1.played ?? false)
    }

    var view: Body {
        ScrollView {
            VStack {
                if let data = backdropData {
                    Picture()
                        .data(data)
                        .frame(minHeight: 300)
                        .frame(maxHeight: 300)
                        .hexpand(true)
                }
                HStack {
                    PosterCell(item: item, client: client)
                        .frame(minWidth: 200)
                        .frame(maxWidth: 200)
                    VStack {
                        Text(item.name ?? "")
                            .title1()
                            .halign(.start)
                        HStack {
                            if let year = item.productionYear {
                                Text("\(year)")
                            }
                            Text(item.runtimeString)
                            if let rating = item.communityRating {
                                RatingBadge(rating: Double(rating))
                            }
                        }
                        .halign(.start)
                        HStack {
                            Button("Play", icon: .default(icon: .mediaPlaybackStart)) {

                            }
                            .suggested()
                            Button(icon: .default(icon: .bookmarkNew)) {
                                toggleFavorite()
                            }
                            Button(isPlayed ? "Mark Unplayed" : "Mark Played") {
                                togglePlayed()
                            }
                            .flat()
                        }
                        .padding(10, .vertical)
                        if let overview = item.overview {
                            Text(overview)
                                .body()
                                .halign(.start)
                        }
                    }
                    .hexpand(true)
                }
                .padding()
                if let people = item.people, !people.isEmpty {
                    VStack {
                        Text("Cast")
                            .title3()
                            .halign(.start)
                        FlowBox(people) { person in
                            PersonCell(person: person)
                        }
                    }
                    .padding()
                }
                if !similarItems.isEmpty {
                    VStack {
                        Text("Similar")
                            .title3()
                            .halign(.start)
                        ScrollView {
                            HStack {
                                ForEach(similarItems) { sim in
                                    PosterCell(item: sim, client: client)
                                }
                            }
                        }
                        .hscrollbarPolicy(.automatic)
                    }
                    .padding()
                }
            }
        }
        .onAppear {
            loadBackdrop()
            loadSimilar()
        }
    }

    private func loadBackdrop() {
        guard let tag = item.backdropImageTag, let itemId = item.id else { return }
        Task { [self] in
            guard
                let url = await client.imageURL(
                    itemId: itemId, imageType: .backdrop, tag: tag, maxWidth: 1920
                )
            else { return }
            let service = ImageService()
            backdropData = try? await service.loadImage(url: url)
        }
    }

    private func loadSimilar() {
        Task { [self] in
            let result = try? await client.getItems(
                userId: userId,
                includeItemTypes: [.movie],
                fields: [.overview, .genres, .mediaSources],
                sortBy: [.sortName],
                limit: 10,
                recursive: true
            )
            similarItems = result?.items ?? []
        }
    }

    private func toggleFavorite() {
        Task { [self] in
            if isFavorite {
                try? await client.unmarkFavoriteItem(itemId: item.id ?? "", userId: userId)
            } else {
                try? await client.markFavoriteItem(itemId: item.id ?? "", userId: userId)
            }
            isFavorite.toggle()
        }
    }

    private func togglePlayed() {
        Task { [self] in
            if isPlayed {
                try? await client.markUnplayedItem(itemId: item.id ?? "", userId: userId)
            } else {
                try? await client.markPlayedItem(itemId: item.id ?? "", userId: userId)
            }
            isPlayed.toggle()
        }
    }
}