export type UploadTask = {
    uri: string;
    filename: string;
    status: 'pending' | 'uploading' | 'success' | 'failed' | 'skipped';
    progress: number; // 0-100
    file_id?: string; // 后端返回的文件ID
    created_at: number; // unix timestamp
};

export interface DatabaseInterface {
    initUploadTable(): Promise<void>;
    insertUploadTask(task: Omit<UploadTask, 'created_at'>): Promise<void>;
    getUploadTaskStatus(uri: string): Promise<UploadTask | null>;
    updateUploadTaskStatus(uri: string, status: UploadTask['status'], file_id?: string): Promise<void>;
    updateUploadTaskProgress(uri: string, progress: number): Promise<void>;
    getUploadTasks(): Promise<UploadTask[]>;
    cleanUpUploadTasks(): Promise<void>;
    getUploadTasksSince(timestamp: number): Promise<UploadTask[]>;
    exist_pending_tasks(): Promise<boolean>;
    filterExistingFiles(fileUris: string[]): Promise<string[]>;
    setAppState(key: string, value: string | null): Promise<void>;
    getAppState(key: string): Promise<string | null>;
    executeSql(sql: string, params?: any[]): Promise<any>;
}