/**
 * DC模块数据库表检查脚本（使用Prisma）
 * 
 * 验证dc_schema和4个表是否已创建
 */

import { PrismaClient } from '@prisma/client';

const prisma = new PrismaClient();

async function checkDCTables() {
  try {
    console.log('');
    console.log('============================================================');
    console.log('[DC模块] 数据库表检查');
    console.log('============================================================');
    console.log('');
    console.log('✅ Prisma连接初始化成功');
    console.log('');

    // 1. 检查dc_schema是否存在
    console.log('📋 检查1: dc_schema是否存在？');
    const schemaResult = await prisma.$queryRawUnsafe(`
      SELECT schema_name 
      FROM information_schema.schemata 
      WHERE schema_name = 'dc_schema'
    `);

    if (schemaResult.length === 0) {
      console.log('❌ dc_schema 不存在！');
      console.log('');
      console.log('💡 解决方案：');
      console.log('   cd backend');
      console.log('   npx prisma db push');
      console.log('');
      await prisma.$disconnect();
      process.exit(1);
    }

    console.log('✅ dc_schema 存在');
    console.log('');

    // 2. 检查4个表是否存在
    console.log('📋 检查2: DC模块的4个表是否存在？');
    console.log('');

    const tables = [
      { name: 'dc_health_checks', display: '健康检查表', model: 'dCHealthCheck' },
      { name: 'dc_templates', display: '预设模板表', model: 'dCTemplate' },
      { name: 'dc_extraction_tasks', display: '提取任务表', model: 'dCExtractionTask' },
      { name: 'dc_extraction_items', display: '提取明细表', model: 'dCExtractionItem' },
    ];

    let allTablesExist = true;
    const missingTables = [];
    const tableCounts = {};

    for (const table of tables) {
      try {
        const tableResult = await prisma.$queryRawUnsafe(`
          SELECT table_name 
          FROM information_schema.tables 
          WHERE table_schema = 'dc_schema' 
          AND table_name = '${table.name}'
        `);

        if (tableResult.length > 0) {
          // 获取行数
          const countResult = await prisma.$queryRawUnsafe(`
            SELECT COUNT(*) as count FROM dc_schema.${table.name}
          `);
          const count = Number(countResult[0].count);
          tableCounts[table.name] = count;
          
          console.log(`   ✅ ${table.display} (${table.name})`);
          console.log(`      记录数: ${count} 条`);
        } else {
          console.log(`   ❌ ${table.display} (${table.name}): 不存在`);
          allTablesExist = false;
          missingTables.push(table.name);
        }
      } catch (error) {
        console.log(`   ❌ ${table.display} (${table.name}): 检查失败 - ${error.message}`);
        allTablesExist = false;
        missingTables.push(table.name);
      }
    }

    console.log('');

    // 3. 检查dc_templates是否有预设数据
    if (allTablesExist) {
      console.log('📋 检查3: dc_templates预设模板是否存在？');
      const templateCount = tableCounts['dc_templates'];
      
      if (templateCount === 0) {
        console.log('⚠️  dc_templates表为空（没有预设模板）');
        console.log('');
        console.log('💡 需要启动后端服务初始化预设模板：');
        console.log('   cd backend');
        console.log('   npm run dev');
        console.log('   （启动时会自动seed 3个预设模板）');
      } else {
        console.log(`✅ dc_templates已有 ${templateCount} 个预设模板`);
        
        // 列出模板
        try {
          const templates = await prisma.$queryRawUnsafe(`
            SELECT disease_type, report_type, display_name 
            FROM dc_schema.dc_templates
            ORDER BY created_at
          `);
          
          if (templates.length > 0) {
            console.log('');
            console.log('   预设模板列表：');
            templates.forEach((t, i) => {
              console.log(`   ${i + 1}. ${t.display_name} (${t.disease_type}/${t.report_type})`);
            });
          }
        } catch (error) {
          console.log('   ⚠️  无法获取模板详情');
        }
      }
      console.log('');
    }

    // 4. 总结
    console.log('============================================================');
    console.log('[总结]');
    console.log('============================================================');
    console.log('');

    if (allTablesExist) {
      console.log('🎉 恭喜！DC模块数据库表已全部创建！');
      console.log('');
      console.log('✅ dc_schema: 存在');
      console.log('✅ 4个数据表: 全部存在');
      console.log('');
      console.log('📊 数据统计：');
      console.log(`   - dc_health_checks: ${tableCounts['dc_health_checks']} 条`);
      console.log(`   - dc_templates: ${tableCounts['dc_templates']} 条`);
      console.log(`   - dc_extraction_tasks: ${tableCounts['dc_extraction_tasks']} 条`);
      console.log(`   - dc_extraction_items: ${tableCounts['dc_extraction_items']} 条`);
      console.log('');
      console.log('📌 下一步：');
      if (tableCounts['dc_templates'] === 0) {
        console.log('   1. ⚠️  启动后端初始化预设模板（npm run dev）');
        console.log('   2. 然后可以开始前端开发！');
      } else {
        console.log('   ✅ 可以开始前端开发了！');
      }
      console.log('');
      
      await prisma.$disconnect();
      process.exit(0);
    } else {
      console.log('⚠️  DC模块数据库表未完全创建');
      console.log('');
      console.log('❌ 缺少以下表：');
      missingTables.forEach(t => console.log(`   - ${t}`));
      console.log('');
      console.log('💡 解决方案：');
      console.log('   cd backend');
      console.log('   npx prisma db push');
      console.log('');
      
      await prisma.$disconnect();
      process.exit(1);
    }

  } catch (error) {
    console.error('');
    console.error('❌ 检查失败：', error.message);
    console.error('');
    
    if (error.message.includes('connect') || error.message.includes('ECONNREFUSED')) {
      console.error('💡 数据库连接失败，请确认：');
      console.error('   1. PostgreSQL服务是否已启动？');
      console.error('   2. DATABASE_URL环境变量是否正确？');
      console.error('      当前: ' + (process.env.DATABASE_URL || '未设置'));
      console.error('');
      console.error('   期望格式:');
      console.error('   postgresql://postgres:postgres123@localhost:5432/ai_clinical_research');
    }
    
    console.error('');
    console.error('详细错误：');
    console.error(error);
    console.error('');
    
    await prisma.$disconnect().catch(() => {});
    process.exit(1);
  }
}

// 执行检查
checkDCTables();