/**
 * 成品 / 视频相关 API
 * 包含：列表查询、复核状态、批量下载
 * 后端无 /products 路由，实际从 /generation/tasks 端点获取数据
 */
import apiClient from "./client";
import { getGenerationTaskResults } from "./editPlans";
import type { GeneratedVideo } from "./editPlans";

/** 复核状态 */
export type ReviewStatus = "pending_review" | "approved" | "rejected";

/** 成品条目 */
export interface ProductItem {
  id: string;
  title: string;
  video_url?: string;
  thumbnail_url?: string;
  duration_seconds?: number;
  file_size?: number;
  resolution?: string;
  status: "processing" | "completed" | "failed";
  /** 复核状态 */
  review_status?: ReviewStatus;
  /** 所属项目 ID */
  project_id?: string;
  /** 所属项目名称 */
  project_name?: string;
  /** 查重率（百分比） */
  duplicate_rate?: number;
  created_at?: string;
  updated_at?: string;
}

/** 列表查询参数 */
export interface ProductListParams {
  page?: number;
  page_size?: number;
  project_id?: string;
  review_status?: ReviewStatus | "all";
}

/** 分页响应 */
export interface ProductListResponse {
  items: ProductItem[];
  total: number;
  page: number;
  page_size: number;
}

/** 批量下载任务状态 */
export interface BatchDownloadStatus {
  job_id: string;
  status: "processing" | "completed" | "failed";
  /** 完成后返回的下载 URL */
  download_url?: string;
  /** 进度百分比 */
  progress?: number;
}

/**
 * 将 generation task 数据映射为 ProductItem 格式
 */
function mapTaskToProductItem(task: GeneratedVideo): ProductItem {
  return {
    id: task.id,
    title: task.name || "未命名视频",
    video_url: task.file_url,
    thumbnail_url: task.thumbnail_url,
    duration_seconds: task.duration,
    file_size: task.file_size,
    resolution:
      task.width && task.height ? `${task.width}x${task.height}` : undefined,
    status:
      task.status === "completed"
        ? "completed"
        : task.status === "failed"
          ? "failed"
          : "processing",
    review_status: task.review_status as ReviewStatus | undefined,
    project_id: task.project_id,
    created_at: task.created_at,
    updated_at: task.updated_at,
  };
}

/** 获取成品列表（支持分页和筛选）— 实际从 generation tasks 获取 */
export const getProducts = async (
  params?: ProductListParams,
): Promise<ProductItem[]> => {
  const response = await apiClient.get("/generation/tasks", { params });
  const tasks = response.data.items || response.data || [];
  return tasks.map(mapTaskToProductItem);
};

/** 获取单个成品详情 — 通过 task ID 获取结果 */
export const getProduct = async (productId: string): Promise<ProductItem> => {
  const response = await apiClient.get(`/generation/tasks/${productId}`);
  return mapTaskToProductItem(response.data);
};

/** 删除成品 — 删除 generation task */
export const deleteProduct = async (productId: string): Promise<void> => {
  await apiClient.delete(`/generation/tasks/${productId}`);
};

/** 获取成品下载链接 — 从 generation task results 获取 */
export const getProductDownloadUrl = async (
  productId: string,
): Promise<{ url: string; expires_at: string }> => {
  const videos = await getGenerationTaskResults(productId);
  const video = videos[0];
  if (!video?.download_url) throw new Error("下载链接不可用");
  return { url: video.download_url, expires_at: "" };
};

/** 更新复核状态 — TODO: 后端暂无对应端点，暂存本地状态 */
export const updateReviewStatus = async (
  productId: string,
  status: ReviewStatus,
): Promise<ProductItem> => {
  // 后端暂无 /generation/tasks/{id}/review 端点
  // 暂时返回当前状态，后续可扩展
  const product = await getProduct(productId);
  return { ...product, review_status: status };
};

/** 发起批量下载 — TODO: 后端暂无对应端点 */
export const batchDownload = async (
  videoIds: string[],
): Promise<{ job_id: string }> => {
  // 后端暂无 /generation/tasks/batch-download 端点
  // 暂时返回模拟 job_id，后续可扩展
  console.warn("[batchDownload] 后端暂无批量下载端点", videoIds);
  return { job_id: `mock-${Date.now()}` };
};

/** 查询批量下载状态 — TODO: 后端暂无对应端点 */
export const getBatchDownloadStatus = async (
  jobId: string,
): Promise<BatchDownloadStatus> => {
  // 后端暂无 /generation/tasks/batch-download/{jobId} 端点
  // 暂时返回模拟状态，后续可扩展
  console.warn("[getBatchDownloadStatus] 后端暂无批量下载状态端点", jobId);
  return { job_id: jobId, status: "processing", progress: 0 };
};