// =====================================================
// 強制終止連線 API
// =====================================================

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

export async function POST(request: NextRequest) {
  try {
    console.log('💀 開始強制終止所有資料庫連線...');
    
    // 獲取所有 AI_Platform 的連線
    const connections = await db.query(`
      SELECT ID, USER, HOST, DB, COMMAND, TIME, STATE 
      FROM INFORMATION_SCHEMA.PROCESSLIST 
      WHERE USER = 'AI_Platform' AND DB = 'db_AI_Platform'
    `);
    
    console.log(`找到 ${connections.length} 個 AI_Platform 連線`);
    
    const killedConnections = [];
    
    // 終止每個連線
    for (const conn of connections) {
      try {
        await db.query(`KILL CONNECTION ${conn.ID}`);
        killedConnections.push({
          id: conn.ID,
          host: conn.HOST,
          time: conn.TIME,
          command: conn.COMMAND
        });
        console.log(`✅ 已終止連線 ${conn.ID} (閒置 ${conn.TIME} 秒)`);
      } catch (error) {
        console.error(`❌ 終止連線 ${conn.ID} 失敗:`, error);
      }
    }
    
    // 等待連線完全關閉
    await new Promise(resolve => setTimeout(resolve, 2000));
    
    // 檢查剩餘連線
    const remainingConnections = await db.query(`
      SELECT COUNT(*) as count
      FROM INFORMATION_SCHEMA.PROCESSLIST 
      WHERE USER = 'AI_Platform' AND DB = 'db_AI_Platform'
    `);
    
    const remainingCount = remainingConnections[0]?.count || 0;
    
    return NextResponse.json({
      success: true,
      message: '強制終止連線完成',
      data: {
        totalFound: connections.length,
        killed: killedConnections.length,
        remaining: remainingCount,
        killedConnections: killedConnections
      }
    });

  } catch (error) {
    console.error('強制終止連線失敗:', error);
    return NextResponse.json({
      success: false,
      message: '強制終止連線失敗',
      error: error instanceof Error ? error.message : '未知錯誤'
    }, { status: 500 });
  }
}