/**
 * 创建 Tool C AI对话历史表
 * 
 * 执行方式：node scripts/create-tool-c-ai-history-table.mjs
 */

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

const prisma = new PrismaClient();

async function createAiHistoryTable() {
  console.log('========================================');
  console.log('开始创建 Tool C AI对话历史表');
  console.log('========================================\n');

  try {
    // 1. 检查表是否已存在
    console.log('[1/4] 检查表是否已存在...');
    const checkResult = await prisma.$queryRawUnsafe(`
      SELECT EXISTS (
        SELECT FROM information_schema.tables 
        WHERE table_schema = 'dc_schema' 
        AND table_name = 'dc_tool_c_ai_history'
      ) as exists
    `);
    
    const tableExists = checkResult[0].exists;
    
    if (tableExists) {
      console.log('✅ 表已存在: dc_schema.dc_tool_c_ai_history');
      console.log('\n如需重新创建，请手动执行: DROP TABLE dc_schema.dc_tool_c_ai_history CASCADE;\n');
      return;
    }
    
    console.log('✅ 表不存在，准备创建\n');

    // 2. 创建表
    console.log('[2/4] 创建表 dc_tool_c_ai_history...');
    await prisma.$executeRawUnsafe(`
      CREATE TABLE dc_schema.dc_tool_c_ai_history (
        id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
        session_id VARCHAR(255) NOT NULL,
        user_id VARCHAR(255) NOT NULL,
        role VARCHAR(50) NOT NULL,
        content TEXT NOT NULL,
        
        -- Tool C特有字段
        generated_code TEXT,
        code_explanation TEXT,
        execute_status VARCHAR(50),
        execute_result JSONB,
        execute_error TEXT,
        retry_count INTEGER DEFAULT 0,
        
        -- LLM相关
        model VARCHAR(100),
        created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP
      )
    `);
    console.log('✅ 表创建成功\n');

    // 3. 创建索引
    console.log('[3/4] 创建索引...');
    await prisma.$executeRawUnsafe(`
      CREATE INDEX idx_dc_tool_c_ai_history_session_id 
      ON dc_schema.dc_tool_c_ai_history(session_id)
    `);
    await prisma.$executeRawUnsafe(`
      CREATE INDEX idx_dc_tool_c_ai_history_user_id 
      ON dc_schema.dc_tool_c_ai_history(user_id)
    `);
    await prisma.$executeRawUnsafe(`
      CREATE INDEX idx_dc_tool_c_ai_history_created_at 
      ON dc_schema.dc_tool_c_ai_history(created_at)
    `);
    console.log('✅ 索引创建成功\n');

    // 4. 添加注释
    console.log('[4/4] 添加表注释...');
    await prisma.$executeRawUnsafe(`
      COMMENT ON TABLE dc_schema.dc_tool_c_ai_history 
      IS 'Tool C (科研数据编辑器) AI对话历史表'
    `);
    await prisma.$executeRawUnsafe(`
      COMMENT ON COLUMN dc_schema.dc_tool_c_ai_history.session_id 
      IS '关联Tool C Session ID'
    `);
    await prisma.$executeRawUnsafe(`
      COMMENT ON COLUMN dc_schema.dc_tool_c_ai_history.generated_code 
      IS 'AI生成的Pandas代码'
    `);
    await prisma.$executeRawUnsafe(`
      COMMENT ON COLUMN dc_schema.dc_tool_c_ai_history.execute_status 
      IS '执行状态: pending/success/failed'
    `);
    await prisma.$executeRawUnsafe(`
      COMMENT ON COLUMN dc_schema.dc_tool_c_ai_history.retry_count 
      IS '自我修正重试次数'
    `);
    console.log('✅ 注释添加成功\n');

    // 5. 验证表创建
    console.log('========================================');
    console.log('验证表结构');
    console.log('========================================\n');
    
    const columns = await prisma.$queryRawUnsafe(`
      SELECT column_name, data_type, is_nullable
      FROM information_schema.columns
      WHERE table_schema = 'dc_schema' 
      AND table_name = 'dc_tool_c_ai_history'
      ORDER BY ordinal_position
    `);
    
    console.log('表结构:');
    console.table(columns);
    
    const indexes = await prisma.$queryRawUnsafe(`
      SELECT indexname, indexdef
      FROM pg_indexes
      WHERE schemaname = 'dc_schema' 
      AND tablename = 'dc_tool_c_ai_history'
    `);
    
    console.log('\n索引:');
    console.table(indexes);

    console.log('\n========================================');
    console.log('🎉 Tool C AI对话历史表创建成功！');
    console.log('========================================\n');
    console.log('表名: dc_schema.dc_tool_c_ai_history');
    console.log(`列数: ${columns.length}`);
    console.log(`索引数: ${indexes.length}\n`);

  } catch (error) {
    console.error('\n❌ 创建表失败:', error.message);
    console.error('\n详细错误:');
    console.error(error);
    process.exit(1);
  } finally {
    await prisma.$disconnect();
  }
}

// 执行
createAiHistoryTable()
  .then(() => {
    console.log('脚本执行完成');
    process.exit(0);
  })
  .catch((error) => {
    console.error('脚本执行失败:', error);
    process.exit(1);
  });