interface AppConfig {
    client_id?: string;
    client_secret?: string;
    download_path?: string;
    streamers?: string[];
    theme?: string;
    download_mode?: 'parts' | 'full';
    part_minutes?: number;
    language?: 'de' | 'en';
    filename_template_vod?: string;
    filename_template_parts?: string;
    filename_template_clip?: string;
    smart_queue_scheduler?: boolean;
    performance_mode?: 'stability' | 'balanced' | 'speed';
    prevent_duplicate_downloads?: boolean;
    persist_queue_on_restart?: boolean;
    metadata_cache_minutes?: number;
    [key: string]: unknown;
}

interface VOD {
    id: string;
    title: string;
    created_at: string;
    duration: string;
    thumbnail_url: string;
    url: string;
    view_count: number;
    stream_id?: string;
}

interface CustomClip {
    startSec: number;
    durationSec: number;
    startPart: number;
    filenameFormat: 'simple' | 'timestamp' | 'template';
    filenameTemplate?: string;
}

interface MergeGroupItem {
    url: string;
    title: string;
    date: string;
    streamer: string;
    duration_str: string;
}

interface MergeGroup {
    items: MergeGroupItem[];
    mergePhase: 'downloading' | 'merging' | 'splitting' | 'cleanup' | 'done';
    currentItemIndex: number;
    downloadedFiles: Record<number, string>;
    mergedFile?: string;
    splitFiles?: string[];
    totalDurationSec?: number;
}

interface QueueItem {
    id: string;
    title: string;
    url: string;
    date: string;
    streamer: string;
    duration_str: string;
    status: 'pending' | 'downloading' | 'paused' | 'completed' | 'error';
    progress: number;
    currentPart?: number;
    totalParts?: number;
    speed?: string;
    eta?: string;
    downloadedBytes?: number;
    totalBytes?: number;
    progressStatus?: string;
    last_error?: string;
    customClip?: CustomClip;
    mergeGroup?: MergeGroup;
}

interface DownloadProgress {
    id: string;
    progress: number;
    speed: string;
    speedBytesPerSec?: number;
    eta: string;
    status: string;
    currentPart?: number;
    totalParts?: number;
    downloadedBytes?: number;
    totalBytes?: number;
}

interface RuntimeMetricsSnapshot {
    cacheHits: number;
    cacheMisses: number;
    duplicateSkips: number;
    retriesScheduled: number;
    retriesExhausted: number;
    integrityFailures: number;
    downloadsStarted: number;
    downloadsCompleted: number;
    downloadsFailed: number;
    downloadedBytesTotal: number;
    lastSpeedBytesPerSec: number;
    avgSpeedBytesPerSec: number;
    activeItemId: string | null;
    activeItemTitle: string | null;
    lastErrorClass: string | null;
    lastRetryDelaySeconds: number;
    timestamp: string;
    queue: {
        pending: number;
        downloading: number;
        paused: number;
        completed: number;
        error: number;
        total: number;
    };
    caches: {
        loginToUserId: number;
        vodList: number;
        clipInfo: number;
    };
    config: {
        performanceMode: 'stability' | 'balanced' | 'speed';
        smartScheduler: boolean;
        metadataCacheMinutes: number;
        duplicatePrevention: boolean;
    };
}

interface VideoInfo {
    duration: number;
    width: number;
    height: number;
    fps: number;
}

interface ClipDialogData {
    url: string;
    title: string;
    date: string;
    streamer: string;
    duration: string;
}

interface UpdateInfo {
    version: string;
    releaseDate?: string;
    releaseName?: string;
    releaseNotes?: string;
}

interface UpdateDownloadProgress {
    percent: number;
    bytesPerSecond: number;
    transferred: number;
    total: number;
}

interface PreflightChecks {
    internet: boolean;
    streamlink: boolean;
    ffmpeg: boolean;
    ffprobe: boolean;
    downloadPathWritable: boolean;
}

interface PreflightResult {
    ok: boolean;
    autoFixApplied: boolean;
    checks: PreflightChecks;
    messages: string[];
    timestamp: string;
}

interface ApiBridge {
    getConfig(): Promise<AppConfig>;
    saveConfig(config: Partial<AppConfig>): Promise<AppConfig>;
    login(): Promise<boolean>;
    getUserId(username: string): Promise<string | null>;
    getVODs(userId: string, forceRefresh?: boolean): Promise<VOD[]>;
    getQueue(): Promise<QueueItem[]>;
    addToQueue(item: Omit<QueueItem, 'id' | 'status' | 'progress'>): Promise<QueueItem[]>;
    removeFromQueue(id: string): Promise<QueueItem[]>;
    reorderQueue(orderIds: string[]): Promise<QueueItem[]>;
    clearCompleted(): Promise<QueueItem[]>;
    retryFailedDownloads(): Promise<QueueItem[]>;
    createMergeGroup(itemIds: string[]): Promise<QueueItem[]>;
    startDownload(): Promise<boolean>;
    pauseDownload(): Promise<boolean>;
    cancelDownload(): Promise<boolean>;
    isDownloading(): Promise<boolean>;
    downloadClip(url: string): Promise<{ success: boolean; error?: string }>;
    selectFolder(): Promise<string | null>;
    selectVideoFile(): Promise<string | null>;
    selectMultipleVideos(): Promise<string[] | null>;
    saveVideoDialog(defaultName: string): Promise<string | null>;
    openFolder(path: string): Promise<void>;
    getVideoInfo(filePath: string): Promise<VideoInfo | null>;
    extractFrame(filePath: string, timeSeconds: number): Promise<string | null>;
    cutVideo(inputFile: string, startTime: number, endTime: number): Promise<{ success: boolean; outputFile: string | null }>;
    mergeVideos(inputFiles: string[], outputFile: string): Promise<{ success: boolean; outputFile: string | null }>;
    getVersion(): Promise<string>;
    checkUpdate(): Promise<{ checking?: boolean; error?: boolean; skipped?: 'ready-to-install' | 'in-progress' | 'throttled' | 'error' | string }>;
    downloadUpdate(): Promise<{ downloading?: boolean; error?: boolean; skipped?: 'ready-to-install' | 'in-progress' | 'error' | string }>;
    installUpdate(): Promise<void>;
    openExternal(url: string): Promise<void>;
    runPreflight(autoFix: boolean): Promise<PreflightResult>;
    getDebugLog(lines: number): Promise<string>;
    getRuntimeMetrics(): Promise<RuntimeMetricsSnapshot>;
    exportRuntimeMetrics(): Promise<{ success: boolean; cancelled?: boolean; error?: string; filePath?: string }>;
    onDownloadProgress(callback: (progress: DownloadProgress) => void): void;
    onQueueUpdated(callback: (queue: QueueItem[]) => void): void;
    onQueueDuplicateSkipped(callback: (payload: { title: string; streamer: string; url: string }) => void): void;
    onDownloadStarted(callback: () => void): void;
    onDownloadFinished(callback: () => void): void;
    onCutProgress(callback: (percent: number) => void): void;
    onMergeProgress(callback: (percent: number) => void): void;
    onUpdateChecking(callback: () => void): void;
    onUpdateAvailable(callback: (info: UpdateInfo) => void): void;
    onUpdateNotAvailable(callback: () => void): void;
    onUpdateDownloadProgress(callback: (progress: UpdateDownloadProgress) => void): void;
    onUpdateDownloaded(callback: (info: UpdateInfo) => void): void;
    onUpdateError(callback: (payload: { message: string }) => void): void;
}

interface Window {
    api: ApiBridge;
}