#!/usr/bin/env node

// =====================================================
// 觸發器遷移腳本
// =====================================================

const mysql = require('mysql2/promise');
const fs = require('fs');
const path = require('path');

// 資料庫配置
const dbConfig = {
  host: process.env.DB_HOST || 'mysql.theaken.com',
  port: parseInt(process.env.DB_PORT || '33306'),
  user: process.env.DB_USER || 'AI_Platform',
  password: process.env.DB_PASSWORD || 'Aa123456',
  database: process.env.DB_NAME || 'db_AI_Platform',
  charset: 'utf8mb4',
  timezone: '+08:00',
  acquireTimeout: 60000,
  timeout: 60000,
  reconnect: true,
  connectionLimit: 10,
  queueLimit: 0,
};

async function migrateTriggers() {
  let connection;
  
  try {
    console.log('🚀 開始觸發器遷移...');
    
    // 創建連接
    connection = await mysql.createConnection({
      ...dbConfig,
      multipleStatements: true
    });
    
    console.log('✅ 資料庫連接成功');
    
    // 觸發器 SQL
    const triggers = [
      {
        name: 'calculate_app_total_score',
        sql: `CREATE TRIGGER calculate_app_total_score 
        BEFORE INSERT ON app_judge_scores
        FOR EACH ROW
        BEGIN
            SET NEW.total_score = (
                NEW.innovation_score + 
                NEW.technical_score + 
                NEW.usability_score + 
                NEW.presentation_score + 
                NEW.impact_score
            ) / 5.0;
        END`
      },
      {
        name: 'calculate_app_total_score_update',
        sql: `CREATE TRIGGER calculate_app_total_score_update 
        BEFORE UPDATE ON app_judge_scores
        FOR EACH ROW
        BEGIN
            SET NEW.total_score = (
                NEW.innovation_score + 
                NEW.technical_score + 
                NEW.usability_score + 
                NEW.presentation_score + 
                NEW.impact_score
            ) / 5.0;
        END`
      },
      {
        name: 'calculate_proposal_total_score',
        sql: `CREATE TRIGGER calculate_proposal_total_score 
        BEFORE INSERT ON proposal_judge_scores
        FOR EACH ROW
        BEGIN
            SET NEW.total_score = (
                NEW.problem_identification_score + 
                NEW.solution_feasibility_score + 
                NEW.innovation_score + 
                NEW.impact_score + 
                NEW.presentation_score
            ) / 5.0;
        END`
      },
      {
        name: 'calculate_proposal_total_score_update',
        sql: `CREATE TRIGGER calculate_proposal_total_score_update 
        BEFORE UPDATE ON proposal_judge_scores
        FOR EACH ROW
        BEGIN
            SET NEW.total_score = (
                NEW.problem_identification_score + 
                NEW.solution_feasibility_score + 
                NEW.innovation_score + 
                NEW.impact_score + 
                NEW.presentation_score
            ) / 5.0;
        END`
      }
    ];
    
    console.log('⚡ 執行觸發器 SQL...');
    
    for (const trigger of triggers) {
      try {
        await connection.query(trigger.sql);
        console.log(`✅ 創建觸發器: ${trigger.name}`);
      } catch (error) {
        if (error.code === 'ER_TRG_ALREADY_EXISTS') {
          console.log(`⚠️ 觸發器已存在: ${trigger.name}`);
        } else {
          throw error;
        }
      }
    }
    
    console.log('✅ 觸發器創建成功！');
    
    // 檢查觸發器
    console.log('🔍 檢查觸發器...');
    const [triggerList] = await connection.execute('SHOW TRIGGERS');
    console.log(`⚙️ 共創建了 ${triggerList.length} 個觸發器:`);
    
    triggerList.forEach((trigger, index) => {
      console.log(`  ${index + 1}. ${trigger.Trigger}`);
    });
    
    console.log('🎉 觸發器遷移完成！');
    
  } catch (error) {
    console.error('❌ 觸發器遷移失敗:', error.message);
    console.error('詳細錯誤:', error);
    process.exit(1);
  } finally {
    if (connection) {
      await connection.end();
      console.log('🔌 資料庫連接已關閉');
    }
  }
}

// 執行遷移
if (require.main === module) {
  migrateTriggers().catch(console.error);
}

module.exports = { migrateTriggers };