/**
 * 视频生成模块 - API 路由控制器
 */

import Router from '@koa/router';
import { requireAuth } from '../../middleware/auth';
import {
  createVideoProject,
  getVideoProjects,
  getVideoProject,
  updateVideoProject,
  deleteVideoProject,
  generateVideoForProject,
  getGenerateProgress,
  getMaterials,
  uploadMaterial,
  deleteMaterial,
  createVideoProjectFromBook,
} from './video-generator.service';

const router = new Router();

// 测试用户兜底（与其他模块一致）
const TEST_USER_ID = 1;
function currentUserId(ctx: any): number {
  const uid = ctx.state.user?.userId;
  return uid ? parseInt(String(uid)) : TEST_USER_ID;
}

// ============ 视频项目管理 ============

/**
 * GET /api/video/projects
 * 获取视频项目列表（只返回当前用户的项目）
 */
router.get('/projects', requireAuth, async (ctx) => {
  const query = {
    userId: currentUserId(ctx),  // 强制用当前登录用户，忽略客户端传入的 userId
    status: ctx.query.status as any,
    page: ctx.query.page ? Number(ctx.query.page) : 1,
    pageSize: ctx.query.pageSize ? Number(ctx.query.pageSize) : 10,
  };

  const result = await getVideoProjects(query);
  ctx.body = { success: true, data: result };
});

/**
 * POST /api/video/projects
 * 创建视频项目
 */
router.post('/projects', requireAuth, async (ctx) => {
  const body = ctx.request.body as any;
  const userId = currentUserId(ctx);

  const project = await createVideoProject(body, userId);
  ctx.body = { success: true, data: project };
});

/**
 * GET /api/video/projects/:id
 * 获取视频项目详情
 */
router.get('/projects/:id', requireAuth, async (ctx) => {
  const id = Number(ctx.params.id);
  const project = await getVideoProject(id, currentUserId(ctx));

  if (!project) {
    ctx.status = 404;
    ctx.body = { success: false, error: '项目不存在' };
    return;
  }

  ctx.body = { success: true, data: project };
});

/**
 * PUT /api/video/projects/:id
 * 更新视频项目
 */
router.put('/projects/:id', requireAuth, async (ctx) => {
  const id = Number(ctx.params.id);
  const body = ctx.request.body as any;

  const project = await updateVideoProject(id, body, currentUserId(ctx));

  if (!project) {
    ctx.status = 404;
    ctx.body = { success: false, error: '项目不存在' };
    return;
  }

  ctx.body = { success: true, data: project };
});

/**
 * DELETE /api/video/projects/:id
 * 删除视频项目
 */
router.delete('/projects/:id', requireAuth, async (ctx) => {
  const id = Number(ctx.params.id);
  const success = await deleteVideoProject(id, currentUserId(ctx));

  if (!success) {
    ctx.status = 404;
    ctx.body = { success: false, error: '项目不存在' };
    return;
  }

  ctx.body = { success: true };
});

// ============ 视频生成 ============

/**
 * POST /api/video/projects/:id/generate
 * 开始生成视频
 */
router.post('/projects/:id/generate', requireAuth, async (ctx) => {
  const id = Number(ctx.params.id);
  const result = await generateVideoForProject(id, currentUserId(ctx));

  if (!result.success) {
    ctx.status = 400;
    ctx.body = { success: false, error: result.error };
    return;
  }

  ctx.body = {
    success: true,
    data: {
      outputUrl: result.outputUrl,
      duration: result.duration,
      fileSize: result.fileSize,
    },
  };
});

/**
 * GET /api/video/projects/:id/status
 * 获取生成状态
 */
router.get('/projects/:id/status', requireAuth, async (ctx) => {
  const id = Number(ctx.params.id);
  const status = await getGenerateProgress(id, currentUserId(ctx));

  ctx.body = { success: true, data: status };
});

// ============ 素材管理 ============

/**
 * GET /api/video/materials
 * 获取素材列表
 */
router.get('/materials', requireAuth, async (ctx) => {
  const query = {
    userId: currentUserId(ctx),
    type: ctx.query.type as any,
    category: ctx.query.category as string,
    page: ctx.query.page ? Number(ctx.query.page) : 1,
    pageSize: ctx.query.pageSize ? Number(ctx.query.pageSize) : 20,
  };

  const result = await getMaterials(query);
  ctx.body = { success: true, data: result };
});

/**
 * POST /api/video/materials/upload
 * 上传素材（处理 multipart/form-data 文件上传）
 */
router.post('/materials/upload', requireAuth, async (ctx) => {
  const userId = currentUserId(ctx);

  // 处理 multipart form data
  const body = ctx.request.body as any;
  const files = (ctx.request as any).files as any;

  // 获取上传的文件
  const file = files?.file;
  
  let materialUrl = '';
  
  if (file) {
    // 文件已上传，url 就是文件的路径
    materialUrl = `/uploads/materials/${file.newFilename || file.filename}`;
  } else if (body.url) {
    // 如果没有文件，使用传入的url
    materialUrl = body.url;
  } else {
    ctx.status = 400;
    ctx.body = { success: false, error: 'No file uploaded' };
    return;
  }

  const material = await uploadMaterial({
    type: body.type || 'image',
    name: body.name || file?.newFilename || 'unnamed',
    url: materialUrl,
    thumbnail: body.thumbnail,
    tags: body.tags ? JSON.parse(body.tags) : [],
    category: body.category,
    duration: body.duration ? Number(body.duration) : undefined,
    size: body.size ? Number(body.size) : undefined,
    width: body.width ? Number(body.width) : undefined,
    height: body.height ? Number(body.height) : undefined,
  }, userId);

  ctx.body = { success: true, data: material };
});

/**
 * DELETE /api/video/materials/:id
 * 删除素材
 */
router.delete('/materials/:id', requireAuth, async (ctx) => {
  const id = Number(ctx.params.id);
  const success = await deleteMaterial(id);

  if (!success) {
    ctx.status = 404;
    ctx.body = { success: false, error: '素材不存在' };
    return;
  }

  ctx.body = { success: true };
});

// ============ 快捷入口 ============

/**
 * POST /api/video/books/:bookId/generate
 * 从书籍生成视频项目
 */
router.post('/books/:bookId/generate', requireAuth, async (ctx) => {
  const bookId = Number(ctx.params.bookId);
  const userId = currentUserId(ctx);

  const project = await createVideoProjectFromBook(bookId, undefined, userId);

  if (!project) {
    ctx.status = 404;
    ctx.body = { success: false, error: '书籍不存在' };
    return;
  }

  ctx.body = { success: true, data: project };
});

export default router;