// =====================================================
// 環境變數調試 API
// =====================================================

import { NextRequest, NextResponse } from 'next/server';

export async function GET(request: NextRequest) {
  try {
    console.log('🔍 檢查 Next.js 中的環境變數...');
    
    // 檢查所有相關的環境變數
    const envVars = {
      DB_HOST: process.env.DB_HOST,
      DB_PORT: process.env.DB_PORT,
      DB_NAME: process.env.DB_NAME,
      DB_USER: process.env.DB_USER,
      DB_PASSWORD: process.env.DB_PASSWORD ? '***' : undefined,
      SLAVE_DB_HOST: process.env.SLAVE_DB_HOST,
      SLAVE_DB_PORT: process.env.SLAVE_DB_PORT,
      SLAVE_DB_NAME: process.env.SLAVE_DB_NAME,
      SLAVE_DB_USER: process.env.SLAVE_DB_USER,
      SLAVE_DB_PASSWORD: process.env.SLAVE_DB_PASSWORD ? '***' : undefined,
      DB_DUAL_WRITE_ENABLED: process.env.DB_DUAL_WRITE_ENABLED,
      DB_MASTER_PRIORITY: process.env.DB_MASTER_PRIORITY,
      NODE_ENV: process.env.NODE_ENV,
    };

    console.log('📋 Next.js 環境變數檢查結果:');
    Object.entries(envVars).forEach(([key, value]) => {
      if (value) {
        console.log(`✅ ${key}: ${value}`);
      } else {
        console.log(`❌ ${key}: undefined`);
      }
    });

    return NextResponse.json({
      success: true,
      message: '環境變數檢查完成',
      data: {
        envVars,
        timestamp: new Date().toISOString(),
        nodeEnv: process.env.NODE_ENV,
      }
    });
  } catch (error) {
    console.error('❌ 環境變數檢查失敗:', error);
    return NextResponse.json({
      success: false,
      message: '環境變數檢查失敗',
      error: error instanceof Error ? error.message : '未知錯誤'
    }, { status: 500 });
  }
}