import SwiftUI
import MapKit

enum SidebarSelection: Hashable {
    case home
    case events  
    case watch
    case connect
    case bulletins
}

struct MainAppView: View {
    @State private var dataService = ChurchDataService.shared
    @Environment(\.horizontalSizeClass) private var horizontalSizeClass
    @State private var selectedView: SidebarSelection = .home
    
    var body: some View {
        Group {
            if horizontalSizeClass == .regular {
                // iPad: Use standard NavigationSplitView
                NavigationSplitView {
                    SidebarView(selectedView: $selectedView)
                } detail: {
                    NavigationStack {
                        selectedDetailView
                            .environment(dataService)
                    }
                }
            } else {
                // iPhone: Tab navigation
                TabView {
                    NavigationStack {
                        HomeFeedView()
                            .environment(dataService)
                    }
                    .tabItem {
                        Label("Home", systemImage: "house.fill")
                    }
                    
                    NavigationStack {
                        EventsListView()
                            .environment(dataService)
                    }
                    .tabItem {
                        Label("Events", systemImage: "calendar")
                    }
                    
                    NavigationStack {
                        WatchView()
                            .environment(dataService)
                    }
                    .tabItem {
                        Label("Watch", systemImage: "play.rectangle.fill")
                    }
                    
                    NavigationStack {
                        ConnectView()
                            .environment(dataService)
                    }
                    .tabItem {
                        Label("Connect", systemImage: "person.2.fill")
                    }
                    
                    NavigationStack {
                        BulletinsView()
                            .environment(dataService)
                    }
                    .tabItem {
                        Label("Bulletins", systemImage: "newspaper.fill")
                    }
                }
                .tint(Color(hex: "fb8b23"))
            }
        }
        .task {
            await dataService.loadHomeFeed()
        }
        .overlay {
            SharedVideoOverlay()
        }
    }
    
    
    @ViewBuilder
    private var selectedDetailView: some View {
        switch selectedView {
        case .home:
            HomeFeedView()
        case .events:
            EventsListView()  // Just use the regular list view - NavigationStack will handle details
        case .watch:
            WatchView()
        case .connect:
            ConnectView()
        case .bulletins:
            BulletinsView()
        }
    }
}

struct SidebarView: View {
    @Binding var selectedView: SidebarSelection
    
    var body: some View {
        List {
            Button(action: { selectedView = .home }) {
                Label("Home", systemImage: "house.fill")
            }
            .foregroundColor(selectedView == .home ? .blue : .primary)
            
            Button(action: { selectedView = .events }) {
                Label("Events", systemImage: "calendar")
            }
            .foregroundColor(selectedView == .events ? .blue : .primary)
            
            Button(action: { selectedView = .watch }) {
                Label("Watch", systemImage: "play.rectangle.fill")
            }
            .foregroundColor(selectedView == .watch ? .blue : .primary)
            
            Button(action: { selectedView = .connect }) {
                Label("Connect", systemImage: "person.2.fill")
            }
            .foregroundColor(selectedView == .connect ? .blue : .primary)
            
            Button(action: { selectedView = .bulletins }) {
                Label("Bulletins", systemImage: "newspaper.fill")
            }
            .foregroundColor(selectedView == .bulletins ? .blue : .primary)
            
            // Quick Actions removed - functionality available via main tabs
        }
        .navigationTitle("RTSDA")
        .navigationBarTitleDisplayMode(.large)
    }
}

// MARK: - Placeholder Views (to be implemented)

























// MARK: - New iPad Cards















struct LiveStreamCard: View {
    @Environment(\.horizontalSizeClass) private var horizontalSizeClass
    
    var body: some View {
        Button {
            // Use shared video player like sermons do
            if let livestreamUrl = getLivestreamUrl() {
                SharedVideoManager.shared.playVideo(url: livestreamUrl)
            }
        } label: {
            VStack(spacing: 0) {
                ZStack {
                    // Background gradient
                    LinearGradient(
                        colors: [Color.red, Color.red.opacity(0.8)],
                        startPoint: .topLeading,
                        endPoint: .bottomTrailing
                    )
                    .frame(height: horizontalSizeClass == .regular ? 200 : 150)
                    
                    // Live indicator and play button
                    VStack(spacing: 16) {
                        HStack {
                            // LIVE indicator
                            HStack(spacing: 6) {
                                Circle()
                                    .fill(.white)
                                    .frame(width: 8, height: 8)
                                    .opacity(0.9)
                                
                                Text("LIVE")
                                    .font(.system(size: 14, weight: .bold))
                                    .foregroundColor(.white)
                            }
                            .padding(.horizontal, 12)
                            .padding(.vertical, 6)
                            .background(.black.opacity(0.6))
                            .cornerRadius(20)
                            
                            Spacer()
                        }
                        
                        // Play button
                        Circle()
                            .fill(.white.opacity(0.9))
                            .frame(width: horizontalSizeClass == .regular ? 70 : 60, 
                                   height: horizontalSizeClass == .regular ? 70 : 60)
                            .overlay {
                                Image(systemName: "play.fill")
                                    .font(.system(size: horizontalSizeClass == .regular ? 28 : 24))
                                    .foregroundColor(.red)
                                    .offset(x: 2) // Visual centering
                            }
                            .shadow(color: .black.opacity(0.3), radius: 4)
                    }
                    .padding(20)
                }
                
                // Content section
                VStack(alignment: .leading, spacing: 12) {
                    HStack {
                        VStack(alignment: .leading, spacing: 6) {
                            Text("Live Stream")
                                .font(.system(size: horizontalSizeClass == .regular ? 20 : 18, weight: .bold))
                                .foregroundColor(.primary)
                            
                            Text("Join our live worship service")
                                .font(.system(size: horizontalSizeClass == .regular ? 16 : 14))
                                .foregroundColor(.secondary)
                        }
                        
                        Spacer()
                        
                        Image(systemName: "chevron.right")
                            .font(.title2)
                            .foregroundColor(.secondary)
                    }
                }
                .padding(20)
            }
        }
        .buttonStyle(PlainButtonStyle())
        .background(.regularMaterial, in: RoundedRectangle(cornerRadius: 16))
        .shadow(color: .black.opacity(0.1), radius: 8, x: 0, y: 4)
    }
    
    private func getLivestreamUrl() -> URL? {
        // Use Rust function for JSON parsing - NO business logic in Swift!
        let statusJson = fetchStreamStatusJson()
        let streamUrl = extractStreamUrlFromStatus(statusJson: statusJson)
        
        return streamUrl.isEmpty ? nil : URL(string: streamUrl)
    }
}