/**
 * 测试预招录确认功能是否正常
 */

require('dotenv').config();
const mysql = require('mysql2/promise');

async function testConfirmation() {
    let connection;

    try {
        connection = await mysql.createConnection({
            host: process.env.DB_HOST,
            port: process.env.DB_PORT || 3306,
            user: process.env.DB_USER,
            password: process.env.DB_PASSWORD,
            database: process.env.DB_DATABASE
        });

        console.log('✅ 已连接到数据库\n');

        // 测试1: 检查是否还有锁定的进程
        console.log('📋 测试1: 检查锁定的进程...');
        const [lockedProcesses] = await connection.query(
            "SELECT Id, State, Info FROM INFORMATION_SCHEMA.PROCESSLIST WHERE State LIKE '%waiting for handler commit%' OR State LIKE '%Locked%'"
        );

        if (lockedProcesses.length > 0) {
            console.log(`⚠️  发现 ${lockedProcesses.length} 个锁定的进程:`);
            lockedProcesses.forEach(p => {
                console.log(`  - 进程 ${p.Id}: ${p.State}`);
            });
        } else {
            console.log('✅ 没有发现锁定的进程\n');
        }

        // 测试2: 查看当前所有进程状态
        console.log('📋 测试2: 当前活动进程...');
        const [allProcesses] = await connection.query('SHOW FULL PROCESSLIST');
        console.log(`当前活动进程数: ${allProcesses.length}`);

        const sleepCount = allProcesses.filter(p => p.Command === 'Sleep').length;
        const queryCount = allProcesses.filter(p => p.Command === 'Query').length;
        console.log(`  - Sleep状态: ${sleepCount}`);
        console.log(`  - Query状态: ${queryCount}\n`);

        // 测试3: 检查training_confirmations表是否可以正常查询
        console.log('📋 测试3: 查询training_confirmations表...');
        const [confirmations] = await connection.query(
            'SELECT COUNT(*) as count FROM training_confirmations'
        );
        console.log(`✅ 当前共有 ${confirmations[0].count} 条确认记录\n`);

        // 测试4: 测试是否可以执行INSERT操作（使用一个不存在的user_id和training_unit_id）
        console.log('📋 测试4: 测试INSERT操作...');
        const testUserId = 99999;
        const testTrainingUnitId = 99999;

        try {
            // 先检查是否存在
            const [existing] = await connection.query(
                'SELECT id FROM training_confirmations WHERE user_id = ? AND training_unit_id = ?',
                [testUserId, testTrainingUnitId]
            );

            if (existing.length === 0) {
                // 尝试插入
                await connection.query(
                    'INSERT INTO training_confirmations (user_id, training_unit_id) VALUES (?, ?)',
                    [testUserId, testTrainingUnitId]
                );
                console.log('✅ INSERT操作成功');

                // 清理测试数据
                await connection.query(
                    'DELETE FROM training_confirmations WHERE user_id = ? AND training_unit_id = ?',
                    [testUserId, testTrainingUnitId]
                );
                console.log('✅ 已清理测试数据\n');
            } else {
                console.log('⚠️  测试记录已存在，跳过INSERT测试\n');
            }
        } catch (err) {
            console.error('❌ INSERT操作失败:', err.message);
            if (err.code === 'ER_LOCK_WAIT_TIMEOUT') {
                console.error('⚠️  数据库仍然存在锁定问题！\n');
            }
        }

        // 测试5: 检查是否有重复记录
        console.log('📋 测试5: 检查重复记录...');
        const [duplicates] = await connection.query(`
            SELECT user_id, training_unit_id, COUNT(*) as count
            FROM training_confirmations
            GROUP BY user_id, training_unit_id
            HAVING count > 1
        `);

        if (duplicates.length > 0) {
            console.log(`⚠️  发现 ${duplicates.length} 组重复记录:`);
            duplicates.forEach(dup => {
                console.log(`  - user_id: ${dup.user_id}, training_unit_id: ${dup.training_unit_id}, 数量: ${dup.count}`);
            });
        } else {
            console.log('✅ 没有发现重复记录\n');
        }

        console.log('========================================');
        console.log('✅ 所有测试完成！');
        console.log('========================================\n');
        console.log('💡 现在可以在浏览器中测试预招录确认按钮了');
        console.log('📍 访问: http://localhost:8080/high.html');

    } catch (error) {
        console.error('❌ 测试失败:', error.message);
        console.error('错误详情:', error);
        process.exit(1);
    } finally {
        if (connection) {
            await connection.end();
        }
    }
}

testConfirmation();