import { NextRequest, NextResponse } from 'next/server';
import type { ApiResponse, EventsQueryParams, EventType } from '@/lib/types';
import { getEvents } from '@/lib/analytics';

// 获取事件列表
export async function GET(request: NextRequest) {
  try {
    const searchParams = request.nextUrl.searchParams;
    
    // 构建查询参数，所有参数都是可选的
    const params: Partial<EventsQueryParams> = {
      // 时间范围参数现在是可选的
      ...(searchParams.has('startTime') && { startTime: searchParams.get('startTime')! }),
      ...(searchParams.has('endTime') && { endTime: searchParams.get('endTime')! }),
      
      // 其他过滤参数
      ...(searchParams.has('eventType') && { eventType: searchParams.get('eventType') as EventType }),
      ...(searchParams.has('linkId') && { linkId: searchParams.get('linkId')! }),
      ...(searchParams.has('linkSlug') && { linkSlug: searchParams.get('linkSlug')! }),
      ...(searchParams.has('userId') && { userId: searchParams.get('userId')! }),
      ...(searchParams.has('teamId') && { teamId: searchParams.get('teamId')! }),
      ...(searchParams.has('projectId') && { projectId: searchParams.get('projectId')! }),
      ...(searchParams.has('tags') && { 
        tags: searchParams.get('tags')!.split(',').filter(Boolean) 
      }),
      ...(searchParams.has('searchSlug') && { searchSlug: searchParams.get('searchSlug')! }),
      
      // 分页和排序参数，设置默认值
      page: searchParams.has('page') ? parseInt(searchParams.get('page')!, 10) : 1,
      pageSize: searchParams.has('pageSize') ? parseInt(searchParams.get('pageSize')!, 10) : 20,
      ...(searchParams.has('sortBy') && { sortBy: searchParams.get('sortBy')! }),
      ...(searchParams.has('sortOrder') && { 
        sortOrder: searchParams.get('sortOrder') as 'asc' | 'desc' 
      })
    };

    // 验证 tags 参数
    if (params.tags?.some(tag => !tag.trim())) {
      return NextResponse.json({
        success: false,
        error: 'Invalid tags format'
      }, { status: 400 });
    }

    // 获取事件数据
    const { events, total } = await getEvents(params);

    // 构建响应
    const response: ApiResponse<typeof events> = {
      success: true,
      data: events,
      meta: {
        total,
        page: params.page || 1,
        pageSize: params.pageSize || 20,
        filters: {
          startTime: params.startTime,
          endTime: params.endTime,
          tags: params.tags,
          teamId: params.teamId,
          projectId: params.projectId,
          searchSlug: params.searchSlug
        }
      }
    };

    return NextResponse.json(response);
  } catch (error) {
    console.error('Error in GET /events:', error);
    const response: ApiResponse<null> = {
      success: false,
      error: error instanceof Error ? error.message : 'Unknown error occurred'
    };
    return NextResponse.json(response, { status: 500 });
  }
}