/**
 * 旧版 Python 代码兼容性测试
 *
 * 验证新沙盒能正确执行旧版 FastGPT 生成的 Python 代码写法，包括：
 * - main() 无参数（通过全局变量访问）
 * - main(variables) 单参数字典
 * - main(a, b, c) 多参数展开
 * - print 被收集到 log（旧版直接移除）
 * - 危险模块拦截
 * - 各种返回值类型
 */
import { describe, it, expect, beforeAll, afterAll } from 'vitest';
import { PythonProcessPool } from '../../src/pool/python-process-pool';

let pool: PythonProcessPool;

beforeAll(async () => {
  pool = new PythonProcessPool(1);
  await pool.init();
});

afterAll(async () => {
  await pool.shutdown();
});

describe('旧版 Python 兼容性', () => {
  // ===== main 函数签名兼容 =====

  it('main(variables) 单参数字典写法', async () => {
    const result = await pool.execute({
      code: `def main(variables):
    return {"name": variables["name"], "age": variables["age"]}`,
      variables: { name: 'FastGPT', age: 3 }
    });
    expect(result.success).toBe(true);
    expect(result.data?.codeReturn).toEqual({ name: 'FastGPT', age: 3 });
  });

  it('main(a, b) 多参数展开写法', async () => {
    const result = await pool.execute({
      code: `def main(a, b):
    return {"sum": a + b}`,
      variables: { a: 10, b: 20 }
    });
    expect(result.success).toBe(true);
    expect(result.data?.codeReturn.sum).toBe(30);
  });

  it('main(a, b, c) 三参数展开', async () => {
    const result = await pool.execute({
      code: `def main(a, b, c):
    return {"result": a * b + c}`,
      variables: { a: 3, b: 4, c: 5 }
    });
    expect(result.success).toBe(true);
    expect(result.data?.codeReturn.result).toBe(17);
  });

  it('main() 无参数写法', async () => {
    const result = await pool.execute({
      code: `def main():
    return {"ok": True}`,
      variables: {}
    });
    expect(result.success).toBe(true);
    expect(result.data?.codeReturn.ok).toBe(true);
  });

  it('旧版写法：main 外部直接访问全局变量', async () => {
    const result = await pool.execute({
      code: `prefix = name + "_suffix"
def main(name, age):
    return {"result": prefix, "name": name, "age": age}`,
      variables: { name: 'hello', age: 18 }
    });
    expect(result.success).toBe(true);
    expect(result.data?.codeReturn.result).toBe('hello_suffix');
    expect(result.data?.codeReturn.name).toBe('hello');
    expect(result.data?.codeReturn.age).toBe(18);
  });

  it('旧版写法：无参 main 通过全局变量访问', async () => {
    const result = await pool.execute({
      code: `def main():
    return {"name": name, "age": age}`,
      variables: { name: 'test', age: 25 }
    });
    expect(result.success).toBe(true);
    expect(result.data?.codeReturn).toEqual({ name: 'test', age: 25 });
  });

  it('main 带默认参数', async () => {
    const result = await pool.execute({
      code: `def main(name, greeting="Hello"):
    return {"msg": f"{greeting}, {name}!"}`,
      variables: { name: 'World' }
    });
    expect(result.success).toBe(true);
    expect(result.data?.codeReturn.msg).toBe('Hello, World!');
  });

  // ===== 返回值类型兼容 =====

  it('返回列表（旧版常见）', async () => {
    const result = await pool.execute({
      code: `def main(variables):
    return [variables["a"], variables["b"], variables["a"] + variables["b"]]`,
      variables: { a: 1, b: 2 }
    });
    expect(result.success).toBe(true);
    expect(result.data?.codeReturn).toEqual([1, 2, 3]);
  });

  it('返回嵌套字典', async () => {
    const result = await pool.execute({
      code: `def main(variables):
    return {
        "user": {"name": variables["name"], "tags": ["admin"]},
        "count": 42
    }`,
      variables: { name: 'test' }
    });
    expect(result.success).toBe(true);
    expect(result.data?.codeReturn.user.name).toBe('test');
    expect(result.data?.codeReturn.count).toBe(42);
  });

  it('返回布尔值和 None 转换', async () => {
    const result = await pool.execute({
      code: `def main(variables):
    return {"active": True, "deleted": False, "extra": None}`,
      variables: {}
    });
    expect(result.success).toBe(true);
    expect(result.data?.codeReturn.active).toBe(true);
    expect(result.data?.codeReturn.deleted).toBe(false);
    expect(result.data?.codeReturn.extra).toBeNull();
  });

  // ===== print 行为 =====

  it('print 输出收集到 log（不影响返回值）', async () => {
    const result = await pool.execute({
      code: `def main(variables):
    print("debug step 1")
    print("processing", variables["name"])
    return {"done": True}`,
      variables: { name: 'test' }
    });
    expect(result.success).toBe(true);
    expect(result.data?.codeReturn.done).toBe(true);
    expect(result.data?.log).toContain('debug step 1');
    expect(result.data?.log).toContain('processing');
  });

  // ===== 危险模块拦截 =====

  it('import os 被拦截', async () => {
    const result = await pool.execute({
      code: `import os
def main():
    return {"cwd": os.getcwd()}`,
      variables: {}
    });
    expect(result.success).toBe(false);
    expect(result.message).toContain('os');
  });

  it('import subprocess 被拦截', async () => {
    const result = await pool.execute({
      code: `import subprocess
def main():
    return {"out": subprocess.check_output(["ls"])}`,
      variables: {}
    });
    expect(result.success).toBe(false);
    expect(result.message).toContain('subprocess');
  });

  it('from sys import path 被拦截', async () => {
    const result = await pool.execute({
      code: `from sys import path
def main():
    return {"path": path}`,
      variables: {}
    });
    expect(result.success).toBe(false);
    expect(result.message).toContain('sys');
  });

  // ===== 安全模块允许 =====

  it('import json 允许', async () => {
    const result = await pool.execute({
      code: `import json
def main(variables):
    data = json.dumps(variables)
    parsed = json.loads(data)
    return {"parsed": parsed}`,
      variables: { key: 'value' }
    });
    expect(result.success).toBe(true);
    expect(result.data?.codeReturn.parsed).toEqual({ key: 'value' });
  });

  it('import math 允许', async () => {
    const result = await pool.execute({
      code: `import math
def main(variables):
    return {"sqrt": math.sqrt(variables["n"]), "pi": round(math.pi, 4)}`,
      variables: { n: 16 }
    });
    expect(result.success).toBe(true);
    expect(result.data?.codeReturn.sqrt).toBe(4);
    expect(result.data?.codeReturn.pi).toBe(3.1416);
  });

  it('import re 允许', async () => {
    const result = await pool.execute({
      code: `import re
def main(variables):
    matches = re.findall(r'\\d+', variables["text"])
    return {"numbers": matches}`,
      variables: { text: 'abc123def456' }
    });
    expect(result.success).toBe(true);
    expect(result.data?.codeReturn.numbers).toEqual(['123', '456']);
  });

  // ===== 典型旧版代码模式 =====

  it('旧版典型写法：数据过滤', async () => {
    const result = await pool.execute({
      code: `def main(variables):
    items = variables["items"]
    filtered = [x for x in items if x["score"] >= 60]
    return {"passed": len(filtered), "total": len(items)}`,
      variables: {
        items: [
          { name: 'A', score: 80 },
          { name: 'B', score: 45 },
          { name: 'C', score: 90 },
          { name: 'D', score: 55 }
        ]
      }
    });
    expect(result.success).toBe(true);
    expect(result.data?.codeReturn).toEqual({ passed: 2, total: 4 });
  });

  it('旧版典型写法：字符串处理', async () => {
    const result = await pool.execute({
      code: `def main(variables):
    text = variables["text"]
    words = text.split()
    return {
        "word_count": len(words),
        "upper": text.upper(),
        "reversed": text[::-1]
    }`,
      variables: { text: 'hello world' }
    });
    expect(result.success).toBe(true);
    expect(result.data?.codeReturn.word_count).toBe(2);
    expect(result.data?.codeReturn.upper).toBe('HELLO WORLD');
    expect(result.data?.codeReturn.reversed).toBe('dlrow olleh');
  });

  it('旧版典型写法：日期处理', async () => {
    const result = await pool.execute({
      code: `from datetime import datetime, timedelta
def main(variables):
    dt = datetime.strptime(variables["date"], "%Y-%m-%d")
    next_day = dt + timedelta(days=1)
    return {"next": next_day.strftime("%Y-%m-%d"), "weekday": dt.strftime("%A")}`,
      variables: { date: '2024-01-01' }
    });
    expect(result.success).toBe(true);
    expect(result.data?.codeReturn.next).toBe('2024-01-02');
    expect(result.data?.codeReturn.weekday).toBe('Monday');
  });

  it('旧版典型写法：辅助函数 + main', async () => {
    const result = await pool.execute({
      code: `def calculate_tax(amount, rate):
    return round(amount * rate, 2)

def main(variables):
    amount = variables["amount"]
    tax = calculate_tax(amount, 0.13)
    return {"amount": amount, "tax": tax, "total": amount + tax}`,
      variables: { amount: 100 }
    });
    expect(result.success).toBe(true);
    expect(result.data?.codeReturn).toEqual({ amount: 100, tax: 13, total: 113 });
  });
});