//
//  ContentView.swift
//  vrtnu
//
//  Created by Jens Timmerman on 23/09/2020.
//

import SwiftUI
import AVKit
import AVFoundation
import Combine
import TVUIKit


struct ContentView: View {
    @ViewBuilder
    var body: some View {
        VRTNuView(vrtNu: VRTNu())
    }
}

struct LoginView: View{
    var vrtNu: VRTNu
    @State private var password: String = ""
    @State private var username: String = ""
    @State var authenticationDidFail: Bool = false
    // needed to update parent view when login was succesful
    @Binding var loginaction: Bool


    var body: some View {
        
        if authenticationDidFail {
            Text("Information not correct. Try again.")
                .offset(y: -10)
                .foregroundColor(.red)
        }
        TextField("VRTNu username", text: $username)
        SecureField("VRTNu password", text: $password)
        Button("Inloggen", action: {

            let loginok = vrtNu.login(username: username, password: password)
            if loginok{
                // reload parent view here
                withAnimation {
                    self.loginaction.toggle()
                }
            }else{
                authenticationDidFail = true
            }
        })
    }
}
struct VRTNuView: View{
    var vrtNu: VRTNu
    var body: some View {

        NavigationView(){
            List(vrtNu.getShows(), id: \.title){ show in
                    NavigationLink(destination: ShowView(show: show)){
                        HStack{
                            AsyncImage(url: show.imageURL,placeholder: {
                                //Image(name: "loading")
                                Text("Loading...")
                            }, image:{
                                Image(uiImage:$0)
                                    .resizable()
                            }).aspectRatio(contentMode: .fit).frame(width: 480, height:300)
                            VStack(alignment: .leading){
                                Text(show.title)
                                    .padding()
                                Text(show.showURL.absoluteString)
                            }
                        }
                }
            }.navigationBarTitle("Browse VRT Nu")
        }
    }
}
struct ShowView: View {
    var show: Show
    var body: some View {
        NavigationView(){
            List{
                ForEach(show.getSeasons(), id: \.self){ season in
                Section(header: Text(season.seasonName).font(.largeTitle)) {
                  ForEach(season.getEpisodes(), id:\.self){ episode in
                    NavigationLink(destination: VideoView(episode: episode)){
                        HStack{
                            AsyncImage(url: episode.imageURL,placeholder: {
                                //Image(name: "loading")
                                Text("Loading...")
                            },image:{Image(uiImage:$0).resizable()
                            }).aspectRatio(contentMode: .fit).frame(width: 480, height:300)
                            VStack(alignment: .leading){
                                Text(episode.title).padding()
                                Text(episode.episodeurl)
                            }
                        }
                        }
                    }
                }}
            }
        }
    }
}

struct VisibleShowView: View {
    var show: Show
    var body: some View {
        NavigationView(){
            List(show.getSeasons(), id: \.self){ season in
                NavigationLink(destination: SeasonView(season: season)){
                    Text(season.seasonName)
                }
            }
        }
    }
}

//not used at the moment, we have an integrated view of seasons in the episode list
struct SeasonView: View {
    var season: Season
    var body: some View {
        NavigationView(){
            List(season.getEpisodes(), id:\.self){ episode in
                NavigationLink(destination: VideoView(episode: episode)){
                    HStack{
                        AsyncImage(url: episode.imageURL,placeholder: {
                            //Image(name: "loading")
                            Text("Loading...")
                        },image:{Image(uiImage:$0).resizable()
                        }).aspectRatio(contentMode: .fit).frame(width: 480, height:300)
                        Text(episode.name)

                        }
                    }
                }
            }
        }
}

struct VideoView: View {
    var episode: Episode
    @State var loginaction: Bool = false

        
    var body: some View {
        if episode.authenticated() || loginaction {
            let player = AVPlayer(url: episode.getVideo().hlsUrl);
            VideoPlayer(player: player).fixedSize().onAppear(){
                player.play()
            }
        }else{
            LoginView(vrtNu: episode.season.show.vrtNu, loginaction: $loginaction)
        }
    };
}

struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        //ShowView(show: VRTNu().getShows()[0])
        ContentView()
    }
}