//
//  OriginalWorkDetailView.swift
//  SodaLive
//
//  Created by klaus on 9/15/25.
//

import SwiftUI
import Kingfisher

struct OriginalWorkDetailView: View {
    
    @StateObject var viewModel = OriginalWorkDetailViewModel()
    
    let originalId: Int
    
    var body: some View {
        NavigationStack {
            BaseView(isLoading: $viewModel.isLoading) {
                ZStack(alignment: .top) {
                    if let imageUrl = viewModel.response?.imageUrl {
                        KFImage(URL(string: imageUrl))
                            .cancelOnDisappear(true)
                            .resizable()
                            .scaledToFill()
                            .frame(width: screenSize().width, height: (168 * 288 / 306) + 56)
                            .clipped()
                            .blur(radius: 25)
                    }
                    
                    Color.black.opacity(0.5).ignoresSafeArea()
                    
                    VStack(spacing: 0) {
                        HStack(spacing: 0) {
                            Image("ic_back")
                                .resizable()
                                .frame(width: 24, height: 24)
                                .onTapGesture {
                                    AppState.shared.back()
                                }
                            
                            Spacer()
                        }
                        .padding(.horizontal, 24)
                        .frame(height: 56)
                        
                        if let response = viewModel.response {
                            ScrollView(.vertical, showsIndicators: false) {
                                VStack(spacing: 0) {
                                    OriginalWorkDetailHeaderView(item: response)
                                        .padding(.horizontal, 24)
                                        .padding(.bottom, 24)
                                    
                                    HStack(spacing: 0) {
                                        SeriesDetailTabView(
                                            title: "캐릭터",
                                            width: screenSize().width / 2,
                                            isSelected: viewModel.currentTab == .character
                                        ) {
                                            if viewModel.currentTab != .character {
                                                viewModel.currentTab = .character
                                            }
                                        }
                                        
                                        SeriesDetailTabView(
                                            title: "작품정보",
                                            width: screenSize().width / 2,
                                            isSelected: viewModel.currentTab == .info
                                        ) {
                                            if viewModel.currentTab != .info {
                                                viewModel.currentTab = .info
                                            }
                                        }
                                    }
                                    .background(Color.black)
                                    
                                    Rectangle()
                                        .foregroundColor(Color.gray90.opacity(0.5))
                                        .frame(height: 1)
                                        .frame(maxWidth: .infinity)

                                    switch(viewModel.currentTab) {
                                    case .info:
                                        OriginalWorkInfoView(response: response)
                                    default:
                                        OriginalWorkCharacterView(characters: viewModel.characters)
                                    }
                                }
                            }
                        }
                    }
                }
            }
            .onAppear {
                if viewModel.response == nil {
                    viewModel.originalId = originalId
                }
            }
            .navigationDestination(for: Int.self) { characterId in
                CharacterDetailView(characterId: characterId)
            }
        }
    }
}

struct OriginalWorkCharacterView: View {
    
    private let horizontalPadding: CGFloat = 12
    private let gridSpacing: CGFloat = 12
    
    let characters: [Character]
    
    var body: some View {
        ZStack {
            let width = (screenSize().width - (horizontalPadding * 2) - gridSpacing) / 2
            
            LazyVGrid(
                columns: Array(
                    repeating: GridItem(
                        .flexible(),
                        spacing: gridSpacing,
                        alignment: .topLeading
                    ),
                    count: 2
                ),
                alignment: .leading,
                spacing: gridSpacing
            ) {
                ForEach(characters.indices, id: \.self) { idx in
                    let item = characters[idx]
                    
                    NavigationLink(value: item.characterId) {
                        CharacterItemView(
                            character: item,
                            size: width,
                            rank: 0,
                            isShowRank: false
                        )
                    }
                }
            }
            .padding(.horizontal, horizontalPadding)
        }
        .padding(.top, 24)
        .background(Color.black)
    }
}

struct OriginalWorkInfoView: View {
    
    let response: OriginalWorkDetailResponse
    
    @State private var isExpandDesc = false
    
    var body: some View {
        ZStack {
            VStack(spacing: 16) {
                VStack(alignment: .leading, spacing: 8) {
                    Text("작품 소개")
                        .font(.custom(Font.preBold.rawValue, size: 16))
                        .foregroundColor(.white)
                    
                    Text(response.description)
                        .font(.custom(Font.preRegular.rawValue, size: 14))
                        .foregroundColor(Color(hex: "B0BEC5"))
                        .lineLimit(isExpandDesc ? Int.max : 3)
                        .truncationMode(.tail)
                        .onTapGesture {
                            isExpandDesc.toggle()
                        }
                }
                .padding(16)
                .frame(maxWidth: .infinity, alignment: .leading)
                .background(Color(hex: "263238"))
                .cornerRadius(16)
                
                VStack(alignment: .leading, spacing: 8) {
                    Text("원작 보러 가기")
                        .font(.custom(Font.preBold.rawValue, size: 16))
                        .foregroundColor(Color(hex: "B0BEC5"))
                    
                    ScrollView(.horizontal, showsIndicators: false) {
                        HStack(spacing: 8) {
                            ForEach(0..<response.originalLinks.count, id: \.self) {
                                let link = response.originalLinks[$0]
                                
                                Text(link)
                                    .font(.custom(Font.preRegular.rawValue, size: 14))
                                    .foregroundColor(.white)
                                    .onTapGesture {
                                        if let url = URL(string: link) {
                                            UIApplication.shared.open(url)
                                        }
                                    }
                            }
                        }
                    }
                }
                .padding(16)
                .frame(maxWidth: .infinity, alignment: .leading)
                .background(Color(hex: "263238"))
                .cornerRadius(16)
                
                VStack(alignment: .leading, spacing: 8) {
                    Text("상세 정보")
                        .font(.custom(Font.preBold.rawValue, size: 16))
                        .foregroundColor(.white)
                    
                    HStack(spacing: 16) {
                        VStack(alignment: .leading, spacing: 8) {
                            if let _ = response.writer {
                                Text("작가")
                                    .font(.custom(Font.preRegular.rawValue, size: 14))
                                    .foregroundColor(Color(hex: "B0BEC5"))
                            }
                            
                            if let _ = response.studio {
                                Text("제작사")
                                    .font(.custom(Font.preRegular.rawValue, size: 14))
                                    .foregroundColor(Color(hex: "B0BEC5"))
                            }
                            
                            if let _ = response.originalWork {
                                Text("원작")
                                    .font(.custom(Font.preRegular.rawValue, size: 14))
                                    .foregroundColor(Color(hex: "B0BEC5"))
                            }
                        }
                        
                        VStack(alignment: .leading, spacing: 8) {
                            if let writer = response.writer {
                                Text(writer)
                                    .font(.custom(Font.preRegular.rawValue, size: 14))
                                    .foregroundColor(.white)
                            }
                            
                            if let studio = response.studio {
                                Text(studio)
                                    .font(.custom(Font.preRegular.rawValue, size: 14))
                                    .foregroundColor(.white)
                            }
                            
                            if let originalWork = response.originalWork {
                                Text(originalWork)
                                    .font(.custom(Font.preRegular.rawValue, size: 14))
                                    .foregroundColor(.white)
                                    .underline(response.originalLink != nil ? true : false)
                                    .onTapGesture {
                                        if let link = response.originalLink, let url = URL(string: link) {
                                            UIApplication.shared.open(url)
                                        }
                                    }
                            }
                        }
                    }
                }
                .padding(16)
                .frame(maxWidth: .infinity, alignment: .leading)
                .background(Color(hex: "263238"))
                .cornerRadius(16)
            }
        }
        .padding(24)
        .frame(maxWidth: .infinity)
        .background(Color.black)
    }
}

#Preview {
    OriginalWorkDetailView(originalId: 0)
}