"""
共享值对象单元测试

测试 EntityId 和 Timestamp 值对象的创建、验证和行为。
"""

import pytest
from datetime import datetime, timedelta
from uuid import UUID, uuid4

from src.domain.shared.value_objects import EntityId, Timestamp


class TestEntityId:
    """EntityId 值对象单元测试"""
    
    def test_create_entity_id_with_valid_value(self):
        """测试使用有效值创建实体 ID"""
        # Arrange & Act
        entity_id = EntityId("doc_123")
        
        # Assert
        assert entity_id.value == "doc_123"
    
    def test_create_entity_id_with_empty_string_raises_error(self):
        """测试使用空字符串创建实体 ID 会抛出错误"""
        # Act & Assert
        with pytest.raises(ValueError, match="Entity ID cannot be empty"):
            EntityId("")
    
    def test_create_entity_id_with_whitespace_only_raises_error(self):
        """测试使用仅空格的字符串创建实体 ID 会抛出错误"""
        # Act & Assert
        with pytest.raises(ValueError, match="Entity ID cannot be whitespace only"):
            EntityId("   ")
    
    def test_create_entity_id_with_non_string_raises_error(self):
        """测试使用非字符串值创建实体 ID 会抛出错误"""
        # Act & Assert
        with pytest.raises(ValueError, match="Entity ID must be a string"):
            EntityId(123)  # type: ignore
    
    def test_generate_creates_unique_id(self):
        """测试 generate 方法创建唯一 ID"""
        # Act
        id1 = EntityId.generate()
        id2 = EntityId.generate()
        
        # Assert
        assert id1.value != id2.value
        # 验证是有效的 UUID 格式
        UUID(id1.value)
        UUID(id2.value)
    
    def test_from_uuid_creates_entity_id(self):
        """测试从 UUID 创建实体 ID"""
        # Arrange
        uuid_value = uuid4()
        
        # Act
        entity_id = EntityId.from_uuid(uuid_value)
        
        # Assert
        assert entity_id.value == str(uuid_value)
    
    def test_entity_id_is_immutable(self):
        """测试实体 ID 是不可变的"""
        # Arrange
        entity_id = EntityId("doc_123")
        
        # Act & Assert
        with pytest.raises(AttributeError):
            entity_id.value = "doc_456"  # type: ignore
    
    def test_entity_id_str_representation(self):
        """测试实体 ID 的字符串表示"""
        # Arrange
        entity_id = EntityId("doc_123")
        
        # Act & Assert
        assert str(entity_id) == "doc_123"
    
    def test_entity_id_repr_representation(self):
        """测试实体 ID 的详细表示"""
        # Arrange
        entity_id = EntityId("doc_123")
        
        # Act & Assert
        assert repr(entity_id) == "EntityId(value='doc_123')"
    
    def test_entity_id_equality(self):
        """测试实体 ID 的相等性比较"""
        # Arrange
        id1 = EntityId("doc_123")
        id2 = EntityId("doc_123")
        id3 = EntityId("doc_456")
        
        # Act & Assert
        assert id1 == id2
        assert id1 != id3


class TestTimestamp:
    """Timestamp 值对象单元测试"""
    
    def test_create_timestamp_with_valid_datetime(self):
        """测试使用有效 datetime 创建时间戳"""
        # Arrange
        dt = datetime(2025, 1, 15, 10, 30, 0)
        
        # Act
        timestamp = Timestamp(dt)
        
        # Assert
        assert timestamp.value == dt
    
    def test_create_timestamp_with_non_datetime_raises_error(self):
        """测试使用非 datetime 对象创建时间戳会抛出错误"""
        # Act & Assert
        with pytest.raises(ValueError, match="Timestamp value must be a datetime object"):
            Timestamp("2025-01-15")  # type: ignore
    
    def test_now_creates_current_timestamp(self):
        """测试 now 方法创建当前时间戳"""
        # Arrange
        before = datetime.now()
        
        # Act
        timestamp = Timestamp.now()
        
        # Arrange
        after = datetime.now()
        
        # Assert
        assert before <= timestamp.value <= after
    
    def test_from_iso_string_creates_timestamp(self):
        """测试从 ISO 字符串创建时间戳"""
        # Arrange
        iso_string = "2025-01-15T10:30:00"
        
        # Act
        timestamp = Timestamp.from_iso_string(iso_string)
        
        # Assert
        assert timestamp.value == datetime(2025, 1, 15, 10, 30, 0)
    
    def test_from_iso_string_with_invalid_format_raises_error(self):
        """测试从无效 ISO 字符串创建时间戳会抛出错误"""
        # Act & Assert
        with pytest.raises(ValueError, match="Invalid ISO timestamp string"):
            Timestamp.from_iso_string("invalid-date")
    
    def test_to_iso_string_converts_to_iso_format(self):
        """测试转换为 ISO 字符串"""
        # Arrange
        dt = datetime(2025, 1, 15, 10, 30, 0)
        timestamp = Timestamp(dt)
        
        # Act
        iso_string = timestamp.to_iso_string()
        
        # Assert
        assert iso_string == "2025-01-15T10:30:00"
    
    def test_is_before_returns_true_for_earlier_timestamp(self):
        """测试 is_before 对于更早的时间戳返回 True"""
        # Arrange
        ts1 = Timestamp(datetime(2025, 1, 15, 10, 0, 0))
        ts2 = Timestamp(datetime(2025, 1, 15, 11, 0, 0))
        
        # Act & Assert
        assert ts1.is_before(ts2)
        assert not ts2.is_before(ts1)
    
    def test_is_after_returns_true_for_later_timestamp(self):
        """测试 is_after 对于更晚的时间戳返回 True"""
        # Arrange
        ts1 = Timestamp(datetime(2025, 1, 15, 10, 0, 0))
        ts2 = Timestamp(datetime(2025, 1, 15, 11, 0, 0))
        
        # Act & Assert
        assert ts2.is_after(ts1)
        assert not ts1.is_after(ts2)
    
    def test_timestamp_is_immutable(self):
        """测试时间戳是不可变的"""
        # Arrange
        timestamp = Timestamp.now()
        
        # Act & Assert
        with pytest.raises(AttributeError):
            timestamp.value = datetime.now()  # type: ignore
    
    def test_timestamp_str_representation(self):
        """测试时间戳的字符串表示"""
        # Arrange
        dt = datetime(2025, 1, 15, 10, 30, 0)
        timestamp = Timestamp(dt)
        
        # Act & Assert
        assert str(timestamp) == "2025-01-15T10:30:00"
    
    def test_timestamp_repr_representation(self):
        """测试时间戳的详细表示"""
        # Arrange
        dt = datetime(2025, 1, 15, 10, 30, 0)
        timestamp = Timestamp(dt)
        
        # Act & Assert
        assert "Timestamp(value=" in repr(timestamp)
    
    def test_timestamp_equality(self):
        """测试时间戳的相等性比较"""
        # Arrange
        dt = datetime(2025, 1, 15, 10, 30, 0)
        ts1 = Timestamp(dt)
        ts2 = Timestamp(dt)
        ts3 = Timestamp(dt + timedelta(seconds=1))
        
        # Act & Assert
        assert ts1 == ts2
        assert ts1 != ts3
    
    def test_timestamp_comparison_operators(self):
        """测试时间戳的比较运算符"""
        # Arrange
        ts1 = Timestamp(datetime(2025, 1, 15, 10, 0, 0))
        ts2 = Timestamp(datetime(2025, 1, 15, 11, 0, 0))
        ts3 = Timestamp(datetime(2025, 1, 15, 11, 0, 0))
        
        # Act & Assert
        assert ts1 < ts2
        assert ts1 <= ts2
        assert ts2 > ts1
        assert ts2 >= ts1
        assert ts2 <= ts3
        assert ts2 >= ts3
    
    def test_timestamp_equality_with_non_timestamp_returns_false(self):
        """测试时间戳与非时间戳对象比较返回 False"""
        # Arrange
        timestamp = Timestamp.now()
        
        # Act & Assert
        assert timestamp != "not a timestamp"
        assert timestamp != 123
        assert timestamp != None