sodalive-ios/SodaLive/Sources/Content/Main/V2/ContentMainBannerViewV2.swift

//
//  ContentMainBannerViewV2.swift
//  SodaLive
//
//  Created by klaus on 2/20/25.
//

import SwiftUI

import Kingfisher

struct ContentMainBannerViewV2: View {
    
    let bannerList: [GetAudioContentBannerResponse]
    
    @State var currentIndex = 0
    @State var timer = Timer.publish(every: 4, on: .main, in: .common).autoconnect()
    
    @State var width: CGFloat = 0
    @State var height: CGFloat = 0
    
    var body: some View {
        VStack(spacing: 0) {
            TabView(selection: $currentIndex) {
                ForEach(0..<bannerList.count, id: \.self) { index in
                    let item = bannerList[index]
                    if let url = item.thumbnailImageUrl.addingPercentEncoding(withAllowedCharacters: .urlQueryAllowed) {
                        ContentMainBannerImageView(
                            url: url,
                            width: width,
                            height: height,
                            item: item
                        )
                    } else {
                        ContentMainBannerImageView(
                            url: item.thumbnailImageUrl,
                            width: width,
                            height: height,
                            item: item
                        )
                    }
                }
            }
            .tabViewStyle(PageTabViewStyle(indexDisplayMode: .never))
            .frame(
                width: width,
                height: height
            )
            
            HStack(spacing: 4) {
                ForEach(0..<bannerList.count, id: \.self) { index in
                    Capsule()
                        .foregroundColor(
                            index == currentIndex
                            ? .button
                            : .gray90
                        )
                        .frame(
                            width: index == currentIndex ? 18 : 6,
                            height: 6
                        )
                        .tag(index)
                }
            }
            .padding(.top, 13.3)
        }
        .frame(maxWidth: .infinity)
        .onAppear {
            width = screenSize().width - 26.7
            height = width * 0.53
            timer = Timer.publish(every: 4, on: .main, in: .common).autoconnect()
        }
        .onDisappear {
            timer.upstream.connect().cancel()
        }
        .onReceive(timer) { _ in
            DispatchQueue.main.async {
                withAnimation {
                    if currentIndex == bannerList.count - 1 {
                        currentIndex = 0
                    } else {
                        currentIndex += 1
                    }
                }
            }
        }
    }
}

#Preview {
    ContentMainBannerViewV2(
        bannerList: [
            GetAudioContentBannerResponse(
                type: .CREATOR,
                thumbnailImageUrl: "https://test-cf.sodalive.net/audition/role/7/audition_role-dc4174e1-10b5-4a97-8379-c7a9336ab230-6691-1735908236571",
                eventItem: nil,
                creatorId: 2,
                seriesId: nil,
                link: nil
            )
        ]
    )
}

struct ContentMainBannerImageView: View {
    let url: String
    let width: CGFloat
    let height: CGFloat
    let item: GetAudioContentBannerResponse
    @State private var boundURL: URL?
    
    var body: some View {
        Group {
            if let boundURL {
                DownsampledKFImage(
                    url: boundURL,
                    size: CGSize(width: width, height: height)
                )
                .cornerRadius(4.7)
            } else {
                Color.clear
                    .frame(width: width, height: height)
                    .cornerRadius(4.7)
            }
        }
        .contentShape(Rectangle())
        .onTapGesture {
            switch item.type {
            case .EVENT:
                AppState.shared.setAppStep(step: .eventDetail(event: item.eventItem!))
            case .CREATOR:
                AppState.shared.setAppStep(step: .creatorDetail(userId: item.creatorId!))
            case .SERIES:
                AppState.shared.setAppStep(step: .seriesDetail(seriesId: item.seriesId!))
            case .LINK:
                if let link = item.link, link.trimmingCharacters(in: .whitespaces).count > 0, let url = URL(string: link), UIApplication.shared.canOpenURL(url) {
                    UIApplication.shared.open(url)
                }
            }
        }
        .onAppear {
            let encoded = url.addingPercentEncoding(withAllowedCharacters: .urlQueryAllowed) ?? url
            boundURL = URL(string: encoded)
        }
        .onDisappear {
            boundURL = nil
        }
    }
}