// =====================================================
// 獲取可用應用列表 API
// =====================================================

import { NextRequest, NextResponse } from 'next/server';
import { db } from '@/lib/database';

export async function GET(request: NextRequest) {
  try {
    console.log('🚀 ========== 應用 API 開始執行 ==========');
    const { searchParams } = new URL(request.url);
    const teamId = searchParams.get('teamId');
    
    console.log('🔍 獲取可用應用列表, teamId:', teamId);
    console.log('🔍 請求 URL:', request.url);
    
    // 先檢查所有應用
    console.log('📊 開始檢查數據庫...');
    const allAppsSql = `SELECT COUNT(*) as count FROM apps`;
    const allAppsResult = await db.query(allAppsSql);
    console.log('📊 數據庫中應用總數:', allAppsResult[0].count);
    
    // 檢查活躍應用
    const activeAppsSql = `SELECT COUNT(*) as count FROM apps WHERE is_active = TRUE`;
    const activeAppsResult = await db.query(activeAppsSql);
    console.log('✅ 活躍應用數量 (is_active = TRUE):', activeAppsResult[0].count);
    
    // 檢查所有應用的 is_active 值
    const allAppsWithStatusSql = `SELECT id, name, is_active, team_id FROM apps LIMIT 5`;
    const allAppsWithStatusResult = await db.query(allAppsWithStatusSql);
    console.log('📋 前5個應用的狀態:', allAppsWithStatusResult);
    
    // 檢查是否有 is_active = 1 的應用
    const activeAppsWith1Sql = `SELECT COUNT(*) as count FROM apps WHERE is_active = 1`;
    const activeAppsWith1Result = await db.query(activeAppsWith1Sql);
    console.log('✅ is_active = 1 的應用數量:', activeAppsWith1Result[0].count);
    
    // 檢查是否有 is_active = '1' 的應用（字符串）
    const activeAppsWithStringSql = `SELECT COUNT(*) as count FROM apps WHERE is_active = '1'`;
    const activeAppsWithStringResult = await db.query(activeAppsWithStringSql);
    console.log('✅ is_active = "1" 的應用數量:', activeAppsWithStringResult[0].count);
    
    // 檢查沒有團隊的應用
    const noTeamAppsSql = `SELECT COUNT(*) as count FROM apps WHERE is_active = 1 AND team_id IS NULL`;
    const noTeamAppsResult = await db.query(noTeamAppsSql);
    console.log('🔓 沒有團隊的應用數量:', noTeamAppsResult[0].count);
    
    // 檢查屬於其他團隊的應用
    const otherTeamAppsSql = `SELECT COUNT(*) as count FROM apps WHERE is_active = 1 AND team_id IS NOT NULL AND team_id != ?`;
    const otherTeamAppsResult = await db.query(otherTeamAppsSql, [teamId || '']);
    console.log('🔓 屬於其他團隊的應用數量:', otherTeamAppsResult[0].count);
    
    // 獲取所有活躍的應用，編輯團隊時顯示所有應用（包括已綁定的）
    // 使用 is_active = 1 因為數據庫中存儲的是數字 1
    // 與 users 表 JOIN 獲取創建者姓名
    let sql = `
      SELECT a.id, a.name, a.description, a.category, a.type, a.icon, a.icon_color, a.app_url, 
             a.creator_id, a.team_id, a.created_at as submissionDate,
             u.name as creator_name
      FROM apps a
      LEFT JOIN users u ON a.creator_id = u.id
      WHERE a.is_active = 1
      ORDER BY a.created_at DESC
    `;
    
    const params: any[] = [];
    
    console.log('📝 執行的 SQL:', sql);
    console.log('📝 參數:', params);
    
    const apps = await db.query(sql, params);
    console.log('📊 查詢結果:', apps.length, '個應用');
    
    // 如果沒有結果，嘗試不同的查詢條件
    if (apps.length === 0) {
      console.log('⚠️ 沒有找到 is_active = 1 的應用，嘗試其他查詢條件...');
      
      // 嘗試 is_active = TRUE
      const sqlTrue = sql.replace('WHERE a.is_active = 1', 'WHERE a.is_active = TRUE');
      const appsTrue = await db.query(sqlTrue, params);
      console.log('📊 is_active = TRUE 查詢結果:', appsTrue.length, '個應用');
      
      // 嘗試 is_active = '1'
      const sqlString = sql.replace('WHERE a.is_active = 1', 'WHERE a.is_active = "1"');
      const appsString = await db.query(sqlString, params);
      console.log('📊 is_active = "1" 查詢結果:', appsString.length, '個應用');
      
      // 嘗試沒有 is_active 條件
      const sqlNoFilter = sql.replace('WHERE a.is_active = 1', 'WHERE 1=1');
      const appsNoFilter = await db.query(sqlNoFilter, params);
      console.log('📊 無 is_active 過濾查詢結果:', appsNoFilter.length, '個應用');
      
      // 使用有結果的查詢
      if (appsTrue.length > 0) {
        console.log('✅ 使用 is_active = TRUE 的結果');
        return NextResponse.json({
          success: true,
          message: '可用應用列表獲取成功',
          data: appsTrue
        });
      } else if (appsString.length > 0) {
        console.log('✅ 使用 is_active = "1" 的結果');
        return NextResponse.json({
          success: true,
          message: '可用應用列表獲取成功',
          data: appsString
        });
      } else if (appsNoFilter.length > 0) {
        console.log('✅ 使用無過濾條件的結果');
        return NextResponse.json({
          success: true,
          message: '可用應用列表獲取成功',
          data: appsNoFilter
        });
      }
    }
    
    console.log('🚀 ========== 應用 API 執行完成 ==========');
    return NextResponse.json({
      success: true,
      message: '可用應用列表獲取成功',
      data: apps
    });

  } catch (error) {
    console.error('❌ 獲取可用應用列表失敗:', error);
    return NextResponse.json({
      success: false,
      message: '獲取可用應用列表失敗',
      error: error instanceof Error ? error.message : '未知錯誤'
    }, { status: 500 });
  }
}