const sqlite3 = require('sqlite3').verbose();
const db = new sqlite3.Database('company_finance.db');

// 修改 payment_requests 表的约束，允许 bank_account 和 bank_name 为空
db.serialize(() => {
  console.log('开始修改 payment_requests 表约束...');
  
  // 由于 SQLite 不支持直接修改列约束，我们需要创建新表并迁移数据
  db.run(`
    CREATE TABLE IF NOT EXISTS payment_requests_new (
      id INTEGER PRIMARY KEY AUTOINCREMENT,
      request_code TEXT UNIQUE NOT NULL,
      applicant TEXT NOT NULL,
      payee TEXT NOT NULL,
      bank_account TEXT DEFAULT '',
      bank_name TEXT DEFAULT '',
      amount REAL NOT NULL,
      amount_cny REAL DEFAULT 0,
      currency TEXT DEFAULT 'CNY',
      payment_date DATE NOT NULL,
      reason TEXT NOT NULL,
      detail_items TEXT,
      attachments TEXT,
      status TEXT DEFAULT 'pending',
      payee_type TEXT DEFAULT 'other',
      payee_id INTEGER,
      expense_type TEXT DEFAULT 'company',
      expense_category TEXT DEFAULT '',
      project_id INTEGER,
      created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
      updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
    )
  `, (err) => {
    if (err) {
      console.error('创建新表失败:', err.message);
      db.close();
      return;
    }
    console.log('✓ 新表创建成功');
    
    // 迁移数据
    db.run(`
      INSERT INTO payment_requests_new (
        id, request_code, applicant, payee, bank_account, bank_name, amount, amount_cny,
        currency, payment_date, reason, detail_items, attachments, status,
        payee_type, payee_id, expense_type, expense_category, project_id,
        created_at, updated_at
      )
      SELECT 
        id, request_code, applicant, payee, 
        COALESCE(bank_account, ''), COALESCE(bank_name, ''),
        amount, amount_cny, currency, payment_date, reason, 
        detail_items, attachments, status,
        COALESCE(payee_type, 'other'), payee_id,
        COALESCE(expense_type, 'company'), COALESCE(expense_category, ''),
        project_id, created_at, updated_at
      FROM payment_requests
    `, (err) => {
      if (err) {
        console.error('迁移数据失败:', err.message);
        db.close();
        return;
      }
      console.log('✓ 数据迁移成功');
      
      // 删除旧表
      db.run('DROP TABLE payment_requests', (err) => {
        if (err) {
          console.error('删除旧表失败:', err.message);
          db.close();
          return;
        }
        console.log('✓ 旧表删除成功');
        
        // 重命名新表
        db.run('ALTER TABLE payment_requests_new RENAME TO payment_requests', (err) => {
          if (err) {
            console.error('重命名表失败:', err.message);
            db.close();
            return;
          }
          console.log('✓ 表重命名成功');
          console.log('\n✓ 表约束修改完成');
          db.close();
        });
      });
    });
  });
});