// =====================================================
// 競賽統計 API
// =====================================================

import { NextRequest, NextResponse } from 'next/server';
import { CompetitionService } from '@/lib/services/database-service';

// 獲取競賽統計數據
export async function GET(request: NextRequest) {
  try {
    const competitions = await CompetitionService.getAllCompetitions();
    
    // 計算統計數據
    const stats = {
      total: competitions.length,
      upcoming: competitions.filter(c => c.status === 'upcoming').length,
      active: competitions.filter(c => c.status === 'active' || c.status === 'ongoing').length,
      ongoing: competitions.filter(c => c.status === 'ongoing').length,
      judging: competitions.filter(c => c.status === 'judging').length,
      completed: competitions.filter(c => c.status === 'completed').length,
      individual: competitions.filter(c => c.type === 'individual').length,
      team: competitions.filter(c => c.type === 'team').length,
      mixed: competitions.filter(c => c.type === 'mixed').length,
      proposal: competitions.filter(c => c.type === 'proposal').length,
      currentYear: competitions.filter(c => c.year === new Date().getFullYear()).length,
      thisMonth: competitions.filter(c => 
        c.year === new Date().getFullYear() && 
        c.month === new Date().getMonth() + 1
      ).length
    };

    return NextResponse.json({
      success: true,
      message: '競賽統計獲取成功',
      data: stats
    });

  } catch (error) {
    console.error('獲取競賽統計失敗:', error);
    return NextResponse.json({
      success: false,
      message: '獲取競賽統計失敗',
      error: error instanceof Error ? error.message : '未知錯誤'
    }, { status: 500 });
  }
}