import { filter } from '../src/index.ts';

const users = [
  {
    metadata: {
      tags: ['premium', 'active'],
      type: 'user',
      region: 'beijing',
      created_at: '2024-03-15T10:00:00Z'
    }
  },
  {
    metadata: {
      tags: ['free'],
      type: 'admin',
      region: 'shanghai',
      created_at: '2024-01-10T09:00:00Z'
    }
  },
  {
    metadata: {
      tags: ['enterprise', 'premium'],
      type: 'user',
      region: 'guangzhou',
      created_at: '2024-04-05T12:00:00Z'
    }
  }
];

console.log('=== 方式1: users.filter(createFilter("...")) ===');

console.log('\n=== premium 用户 ===');
console.log(filter(users, "WHERE metadata.tags CONTAINS 'premium'"));

console.log('\n=== 北京用户 ===');
console.log(filter(users, "WHERE metadata.region = 'beijing'"));

console.log('\n=== user 类型用户 ===');
console.log(filter(users, "WHERE metadata.type = 'user'"));

console.log('\n=== premium 且 user 类型 ===');
console.log(filter(users, "WHERE metadata.tags CONTAINS 'premium' AND metadata.type = 'user'"));

console.log('\n=== 北京或上海用户 ===');
console.log(filter(users, "WHERE metadata.region IN ['beijing', 'shanghai']"));

console.log('\n=== 方式2: filter(users, "...") (支持 ORDER BY 和 LIMIT) ===');

console.log('\n=== 北京用户，按时间倒序 ===');
console.log(filter(users, "WHERE metadata.region = 'beijing' ORDER BY metadata.created_at DESC"));

console.log('\n=== 前2个用户，按时间倒序 ===');
const limitResult = filter(users, "ORDER BY metadata.created_at DESC LIMIT 2");
console.log('Limit result length:', limitResult.length);
console.log(limitResult);

const products = [
  { name: 'Apple iPhone 15', category: 'Phone' },
  { name: 'Samsung Galaxy S24', category: 'Phone' },
  { name: 'Apple MacBook Pro', category: 'Laptop' },
  { name: 'Apple Watch', category: 'Watch' }
];

console.log('\n=== LIKE 测试 ===');
console.log('\n=== 包含 Apple 的产品 (%Apple%) ===');
console.log(filter(products, "WHERE name LIKE '%Apple%'"));

console.log('\n=== 以 Apple 开头的产品 (Apple%) ===');
console.log(filter(products, "WHERE name LIKE 'Apple%'"));

console.log('\n=== 以 Phone 结尾的产品 (%Phone) ===');
console.log(filter(products, "WHERE name LIKE '%Phone%'"));

console.log('\n=== 第二个字符任意的产品 (A_pple%) ===');
console.log(filter(products, "WHERE name LIKE 'A_pple%'"));

console.log('\n=== NOT LIKE 测试 ===');
console.log('\n=== 不包含 Apple 的产品 (NOT LIKE %Apple%) ===');
console.log(filter(products, "WHERE name NOT LIKE '%Apple%'"));

console.log('\n=== IS NULL 和 IS NOT NULL 测试 ===');
const usersWithNull = [
  { name: 'Alice', email: 'alice@example.com', age: 25 },
  { name: 'Bob', email: null, age: 30 },
  { name: 'Charlie', email: undefined, age: 35 },
  { name: 'Diana', email: 'diana@example.com', age: null }
];

console.log('\n=== Email 为 NULL 或 undefined 的用户 ===');
console.log(filter(usersWithNull, "WHERE email IS NULL"));

console.log('\n=== Email 不为 NULL 且不为 undefined 的用户 ===');
console.log(filter(usersWithNull, "WHERE email IS NOT NULL"));

console.log('\n=== Age 不为 NULL 且不为 undefined 的用户 ===');
console.log(filter(usersWithNull, "WHERE age IS NOT NULL"));