const sqlite3 = require('sqlite3').verbose();
const path = require('path');
const fs = require('fs');

const dbPath = path.join(__dirname, 'company_finance.db');
const migrationPath = path.join(__dirname, 'migrations', '002_create_purchase_inventory.sql');

console.log('开始执行采购库存数据库迁移...');
console.log('数据库文件:', dbPath);
console.log('迁移脚本:', migrationPath);

const migrationScript = fs.readFileSync(migrationPath, 'utf8');

const db = new sqlite3.Database(dbPath, (err) => {
  if (err) {
    console.error('数据库连接失败:', err.message);
    process.exit(1);
  }
  console.log('数据库连接成功');
});

db.serialize(() => {
  const statements = migrationScript.split(';').filter(s => s.trim());
  
  statements.forEach((stmt, index) => {
    if (stmt.trim()) {
      console.log(`执行语句 ${index + 1}/${statements.length}`);
      db.run(stmt.trim(), (err) => {
        if (err) {
          if (err.message.includes('duplicate column name') || 
              err.message.includes('already exists')) {
            console.log('  跳过（已存在）');
          } else {
            console.error('  错误:', err.message);
          }
        } else {
          console.log('  成功');
        }
      });
    }
  });
});

db.all("SELECT name FROM sqlite_master WHERE type='table' ORDER BY name", (err, rows) => {
  if (err) {
    console.error('查询表失败:', err.message);
  } else {
    console.log('\n当前数据库表:');
    rows.forEach(row => console.log('-', row.name));
  }
  
  db.close(() => {
    console.log('\n迁移完成！');
  });
});