import ManaCore
import SwiftUI

/// Phase β-0-Placeholder. Wird in β-1 durch eine echte Tab-Bar mit
/// Decks / Study / Stats / Account ersetzt.
struct DashboardView: View {
    @Environment(AuthClient.self) private var auth
    @State private var apiReachable: Bool?

    var body: some View {
        ZStack {
            CardsTheme.background.ignoresSafeArea()
            VStack(spacing: 24) {
                Text("Cards")
                    .font(.largeTitle.bold())
                    .foregroundStyle(CardsTheme.primary)

                if let email = auth.currentEmail {
                    Text("Angemeldet als \(email)")
                        .font(.subheadline)
                        .foregroundStyle(CardsTheme.mutedForeground)
                }

                ContentUnavailableView {
                    Label("β-1 in Vorbereitung", systemImage: "rectangle.stack")
                        .foregroundStyle(CardsTheme.foreground)
                } description: {
                    Text("Decks- und Study-Views kommen in der nächsten Phase.")
                        .foregroundStyle(CardsTheme.mutedForeground)
                }

                if let reachable = apiReachable {
                    Label(
                        reachable ? "cardecky-api erreichbar" : "cardecky-api nicht erreichbar",
                        systemImage: reachable ? "checkmark.circle.fill" : "xmark.circle.fill"
                    )
                    .foregroundStyle(reachable ? CardsTheme.success : CardsTheme.error)
                    .font(.footnote)
                }

                Button("Abmelden", role: .destructive) {
                    Task { await auth.signOut() }
                }
                .padding(.top, 24)
            }
            .padding(32)
        }
        .task {
            let api = CardsAPI(auth: auth)
            apiReachable = (try? await api.healthCheck()) ?? false
        }
    }
}

#Preview {
    DashboardView()
        .environment(AuthClient(config: AppConfig.manaAppConfig))
}