"""
FineTuneX 测试套件
"""

import unittest
import os
import sys
import json


class TestDataLoading(unittest.TestCase):
    """测试数据加载"""
    
    def test_load_json_dataset(self):
        """测试加载 JSON 数据集"""
        from finetunex.data.dataset import load_dataset
        
        # 创建临时测试数据
        test_data = [
            {"instruction": "test1", "output": "output1"},
            {"instruction": "test2", "output": "output2"},
        ]
        
        test_file = "test_data.json"
        with open(test_file, "w", encoding="utf-8") as f:
            json.dump(test_data, f, ensure_ascii=False)
        
        try:
            dataset = load_dataset(test_file, format="json")
            self.assertEqual(len(dataset), 2)
            self.assertEqual(dataset[0]["instruction"], "test1")
        finally:
            if os.path.exists(test_file):
                os.remove(test_file)
    
    def test_format_dataset(self):
        """测试数据集格式化"""
        from finetunex.data.dataset import format_dataset
        from datasets import Dataset
        
        test_data = {
            "instruction": ["test1", "test2"],
            "input": ["", "input2"],
            "output": ["output1", "output2"],
        }
        
        dataset = Dataset.from_dict(test_data)
        formatted = format_dataset(dataset)
        
        self.assertEqual(len(formatted), 2)
        self.assertIn("text", formatted.column_names)


class TestPreprocessing(unittest.TestCase):
    """测试数据预处理"""
    
    def test_create_prompt_default(self):
        """测试创建默认 prompt"""
        from finetunex.data.preprocess import create_prompt
        
        prompt = create_prompt("instruction", "input")
        self.assertIn("instruction", prompt)
        self.assertIn("输入：input", prompt)
    
    def test_create_prompt_no_input(self):
        """测试创建无输入的 prompt"""
        from finetunex.data.preprocess import create_prompt
        
        prompt = create_prompt("instruction")
        self.assertIn("instruction", prompt)
        self.assertNotIn("输入：", prompt)
    
    def test_create_prompt_alpaca(self):
        """测试创建 Alpaca 格式 prompt"""
        from finetunex.data.preprocess import create_prompt
        
        prompt = create_prompt("instruction", "input", template="alpaca")
        self.assertIn("### Instruction:", prompt)
        self.assertIn("### Input:", prompt)


class TestModelConfig(unittest.TestCase):
    """测试模型配置"""
    
    def test_qwen_config(self):
        """测试 Qwen 配置"""
        from finetunex.models.qwen import QwenConfig
        
        config = QwenConfig(
            model_name="Qwen/Qwen3.5-0.5B",
            lora_r=16,
            lora_alpha=32,
        )
        
        self.assertEqual(config.lora_r, 16)
        self.assertEqual(config.lora_alpha, 32)
        self.assertIsNotNone(config.target_modules)
    
    def test_base_config(self):
        """测试基础配置"""
        from finetunex.models.base import BaseModelConfig
        
        config = BaseModelConfig()
        self.assertEqual(config.lora_r, 16)
        self.assertEqual(config.learning_rate, 2e-4)


class TestUtils(unittest.TestCase):
    """测试工具函数"""
    
    def test_format_time(self):
        """测试时间格式化"""
        from finetunex.utils.helpers import format_time
        
        self.assertEqual(format_time(30), "30.00s")
        self.assertEqual(format_time(90), "1.50m")
        self.assertEqual(format_time(3600), "1.00h")
    
    def test_count_parameters(self):
        """测试参数统计"""
        from finetunex.utils.helpers import count_parameters
        import torch.nn as nn
        
        model = nn.Linear(10, 5)
        params = count_parameters(model)
        
        self.assertEqual(params["total"], 55)  # 10*5 + 5
        self.assertEqual(params["trainable"], 55)


class TestAPI(unittest.TestCase):
    """测试 API"""
    
    def test_health_check(self):
        """测试健康检查端点"""
        from fastapi.testclient import TestClient
        from finetunex.api.server import app
        
        client = TestClient(app)
        response = client.get("/health")
        
        self.assertEqual(response.status_code, 200)
        self.assertEqual(response.json()["status"], "healthy")
    
    def test_root_endpoint(self):
        """测试根端点"""
        from fastapi.testclient import TestClient
        from finetunex.api.server import app
        
        client = TestClient(app)
        response = client.get("/")
        
        self.assertEqual(response.status_code, 200)
        self.assertIn("message", response.json())


def run_tests():
    """运行所有测试"""
    # 创建测试套件
    loader = unittest.TestLoader()
    suite = unittest.TestSuite()
    
    # 添加测试
    suite.addTests(loader.loadTestsFromTestCase(TestDataLoading))
    suite.addTests(loader.loadTestsFromTestCase(TestPreprocessing))
    suite.addTests(loader.loadTestsFromTestCase(TestModelConfig))
    suite.addTests(loader.loadTestsFromTestCase(TestUtils))
    suite.addTests(loader.loadTestsFromTestCase(TestAPI))
    
    # 运行测试
    runner = unittest.TextTestRunner(verbosity=2)
    result = runner.run(suite)
    
    return result.wasSuccessful()


if __name__ == "__main__":
    success = run_tests()
    sys.exit(0 if success else 1)