"""
公共工具模块单元测试
"""

import unittest
import time
import sys
import os
from datetime import datetime

sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))


class TestCommonFunctions(unittest.TestCase):
    """测试公共工具函数"""
    
    def test_generate_unique_id(self):
        """测试生成唯一标识符"""
        from utils.common import generate_unique_id
        
        id1 = generate_unique_id()
        id2 = generate_unique_id()
        
        self.assertNotEqual(id1, id2)
        self.assertTrue(id1.startswith("tf-"))
    
    def test_generate_unique_id_with_prefix(self):
        """测试带前缀的唯一标识符"""
        from utils.common import generate_unique_id
        
        id1 = generate_unique_id("camera")
        
        self.assertTrue(id1.startswith("camera_"))
    
    def test_calculate_md5(self):
        """测试MD5计算"""
        from utils.common import calculate_md5
        
        result = calculate_md5("hello world")
        
        self.assertEqual(len(result), 32)
        self.assertEqual(result, "5eb63bbbe01eeed093cb22bb8f5acdc3")
    
    def test_get_current_timestamp(self):
        """测试获取时间戳"""
        from utils.common import get_current_timestamp
        
        result = get_current_timestamp()
        
        self.assertIsInstance(result, str)
        self.assertIn(":", result)
    
    def test_get_current_timestamp_ms(self):
        """测试获取毫秒时间戳"""
        from utils.common import get_current_timestamp_ms
        
        result = get_current_timestamp_ms()
        
        self.assertIsInstance(result, int)
        self.assertGreater(result, 0)
    
    def test_parse_rtsp_url(self):
        """测试解析RTSP URL"""
        from utils.common import parse_rtsp_url
        
        result = parse_rtsp_url("rtsp://192.168.1.1:554/stream1")
        
        self.assertEqual(result["protocol"], "rtsp")
        self.assertEqual(result["host"], "192.168.1.1")
        self.assertEqual(result["port"], "554")
    
    def test_retry_operation_success(self):
        """测试重试成功"""
        from utils.common import retry_operation
        
        call_count = [0]
        
        @retry_operation(max_retries=3, delay=0.01)
        def success_func():
            call_count[0] += 1
            return "success"
        
        result = success_func()
        
        self.assertEqual(result, "success")
        self.assertEqual(call_count[0], 1)
    
    def test_retry_operation_failure(self):
        """测试重试失败"""
        from utils.common import retry_operation
        
        @retry_operation(max_retries=2, delay=0.01)
        def fail_func():
            raise ValueError("test error")
        
        with self.assertRaises(ValueError):
            fail_func()
    
    def test_exponential_backoff(self):
        """测试指数退避"""
        from utils.common import ExponentialBackoff
        
        backoff = ExponentialBackoff(
            base_delay=0.01,
            max_delay=0.1,
            max_attempts=3
        )
        
        delays = []
        for _ in range(3):
            delays.append(backoff.get_delay())
            backoff.next_attempt()
        
        self.assertEqual(len(delays), 3)
        self.assertTrue(delays[0] <= delays[1] <= delays[2])
    
    def test_ensure_directory_exists(self):
        """测试确保目录存在"""
        from utils.common import ensure_directory_exists
        import tempfile
        
        with tempfile.TemporaryDirectory() as tmpdir:
            test_path = os.path.join(tmpdir, "test_dir", "sub_dir")
            
            result = ensure_directory_exists(test_path)
            
            self.assertTrue(result)
            self.assertTrue(os.path.exists(test_path))
    
    def test_format_file_size(self):
        """测试格式化文件大小"""
        from utils.common import format_file_size
        
        self.assertEqual(format_file_size(500), "500.00 B")
        self.assertEqual(format_file_size(1024), "1.00 KB")
        self.assertEqual(format_file_size(1024 * 1024), "1.00 MB")
        self.assertEqual(format_file_size(1024 * 1024 * 1024), "1.00 GB")


class TestPerformanceTimer(unittest.TestCase):
    """测试性能计时器"""
    
    def test_timer_basic(self):
        """测试基本计时"""
        from utils.common import PerformanceTimer
        
        timer = PerformanceTimer()
        timer.start("test")
        time.sleep(0.01)
        elapsed = timer.stop("test")
        
        self.assertGreater(elapsed, 0)
        self.assertLess(elapsed, 1)
    
    def test_timer_get_elapsed(self):
        """测试获取已记录时间"""
        from utils.common import PerformanceTimer
        
        timer = PerformanceTimer()
        timer.start("test")
        time.sleep(0.01)
        timer.stop("test")
        
        elapsed = timer.get_elapsed("test")
        
        self.assertGreater(elapsed, 0)
    
    def test_timer_reset(self):
        """测试重置计时器"""
        from utils.common import PerformanceTimer
        
        timer = PerformanceTimer()
        timer.start("test")
        timer.stop("test")
        
        timer.reset()
        
        self.assertEqual(timer.get_elapsed("test"), 0)


class TestVersionControl(unittest.TestCase):
    """测试版本控制"""
    
    def test_version_control_creation(self):
        """测试版本控制创建"""
        from utils.version_control import VersionControl
        
        vc = VersionControl()
        
        self.assertIsNotNone(vc)
    
    def test_record_update(self):
        """测试记录更新"""
        from utils.version_control import VersionControl
        import tempfile
        
        with tempfile.NamedTemporaryFile(suffix=".md", delete=False) as f:
            path = f.name
        
        try:
            vc = VersionControl(path)
            vc.record_update(
                version="1.0.1",
                update_type="测试",
                description="测试更新",
                updated_by="测试人员"
            )
            
            history = vc.get_version_history()
            
            self.assertGreater(len(history), 0)
            
        finally:
            if os.path.exists(path):
                os.remove(path)
    
    def test_get_changelog_content(self):
        """测试获取CHANGELOG内容"""
        from utils.version_control import VersionControl
        import tempfile
        
        with tempfile.NamedTemporaryFile(suffix=".md", delete=False) as f:
            path = f.name
        
        try:
            vc = VersionControl(path)
            content = vc.get_changelog_content()
            
            self.assertIn("CHANGELOG", content)
            
        finally:
            if os.path.exists(path):
                os.remove(path)


if __name__ == "__main__":
    unittest.main()