import ManaAuthUI
import ManaCore
import SwiftData
import SwiftUI
import WidgetKit

@main
struct ZitareNativeApp: App {
    @State private var auth: AuthClient
    @State private var authGate: ManaAuthGate
    @State private var submissionQueue: SubmissionQueue
    private let snapshotContainer: ModelContainer?
    private let reachability = ReachabilityWatcher()

    init() {
        let auth = AuthClient(config: AppConfig.manaAppConfig)
        auth.bootstrap()
        _auth = State(initialValue: auth)
        _authGate = State(initialValue: ManaAuthGate(auth: auth))
        do {
            snapshotContainer = try SnapshotContainer.make()
        } catch {
            Log.snapshot.error(
                "SnapshotContainer init fehlgeschlagen: \(String(describing: error), privacy: .public)"
            )
            snapshotContainer = nil
        }
        let pending: ModelContainer
        do {
            pending = try PendingSubmissionContainer.make()
        } catch {
            Log.app.error(
                "PendingSubmissionContainer-Disk init fehlgeschlagen, falle auf in-memory zurück: \(String(describing: error), privacy: .public)"
            )
            // In-memory-Fallback statt nil. Submissions sind dann nur
            // für die aktuelle Session persistiert — besser als Crash.
            pending = try! PendingSubmissionContainer.make(inMemory: true)
        }
        _submissionQueue = State(initialValue: SubmissionQueue(container: pending))
        Log.app.info(
            "Zitare starting — auth status: \(String(describing: auth.status), privacy: .public)"
        )
    }

    var body: some Scene {
        WindowGroup {
            RootView()
                .environment(auth)
                .environment(authGate)
                .environment(submissionQueue)
                .tint(ZitareTheme.primary)
                .task {
                    await refreshSnapshot()
                    await flushPending()
                    startReachability()
                }
        }
    }

    private func flushPending() async {
        let api = ZitareAPI(auth: auth)
        let sent = await submissionQueue.tryFlush(api: api)
        if sent > 0 {
            Log.app.info("Auto-flushed \(sent) pending submission(s) at launch")
        }
    }

    /// Startet den NWPathMonitor und hooked Reconnect → Flush.
    /// `Task.detached` + `await MainActor`, weil das Reconnect-Closure
    /// vom Network-Framework auf einer privaten Queue feuert.
    private func startReachability() {
        let queue = submissionQueue
        let auth = auth
        reachability.start { [weak queue] in
            guard let queue else { return }
            Task { @MainActor in
                let api = ZitareAPI(auth: auth)
                let sent = await queue.tryFlush(api: api)
                if sent > 0 {
                    Log.app.info("Reachability-Flush: \(sent) Submission(s) nachgereicht")
                }
            }
        }
    }

    private func refreshSnapshot() async {
        guard let container = snapshotContainer else { return }
        let sync = SnapshotSync(container: container)
        await sync.tryRefresh()
        // Widget-Timeline neu erstellen lassen, sodass der nächste
        // Render-Pass den frischen Snapshot sieht.
        WidgetCenter.shared.reloadAllTimelines()
    }
}