"""
模板系统单元测试

测试 Template 类的初始化、变量解析、条件渲染和模板渲染功能
"""

import pytest
from pathlib import Path
from loaders.yaml_loader import YAMLError
from core.template import Template
from core.presentation import Presentation


# ============= 模板初始化测试 =============


class TestTemplateFromData:
    """Template.from_data 方法测试类"""

    def test_from_data_with_valid_template(self, temp_dir):
        """测试从有效数据创建模板"""
        template_data = {
            "vars": [
                {"name": "title", "required": True},
                {"name": "subtitle", "required": False, "default": ""}
            ],
            "elements": [
                {"type": "text", "box": [1, 2, 8, 1], "content": "{title}"}
            ]
        }
        template = Template.from_data(template_data, "test-template", base_dir=temp_dir)
        assert template.data is not None
        assert "elements" in template.data
        assert "vars" in template.data
        assert template.base_dir == temp_dir

    def test_from_data_without_vars(self, temp_dir):
        """测试创建没有变量的模板"""
        template_data = {
            "elements": [
                {"type": "text", "box": [1, 2, 8, 1], "content": "Static Text"}
            ]
        }
        template = Template.from_data(template_data, "static-template", base_dir=temp_dir)
        assert len(template.vars_def) == 0
        assert len(template.elements) == 1

    def test_from_data_with_empty_vars(self, temp_dir):
        """测试创建空变量列表的模板"""
        template_data = {
            "vars": [],
            "elements": []
        }
        template = Template.from_data(template_data, "empty-template", base_dir=temp_dir)
        assert len(template.vars_def) == 0
        assert len(template.elements) == 0

    def test_from_data_render_with_vars(self, temp_dir):
        """测试使用 from_data 创建的模板可以正常渲染"""
        template_data = {
            "vars": [{"name": "title", "required": True}],
            "elements": [
                {"type": "text", "box": [1, 2, 8, 1], "content": "{title}"}
            ]
        }
        template = Template.from_data(template_data, "test-template", base_dir=temp_dir)
        rendered = template.render({"title": "Hello"})
        assert rendered[0]["content"] == "Hello"

    def test_from_data_render_with_default_value(self, temp_dir):
        """测试使用默认值渲染"""
        template_data = {
            "vars": [
                {"name": "title", "required": False, "default": "Default Title"}
            ],
            "elements": [
                {"type": "text", "box": [1, 2, 8, 1], "content": "{title}"}
            ]
        }
        template = Template.from_data(template_data, "test-template", base_dir=temp_dir)
        rendered = template.render({})
        assert rendered[0]["content"] == "Default Title"

    def test_from_data_with_conditional_element(self, temp_dir):
        """测试条件元素"""
        template_data = {
            "vars": [{"name": "show", "required": False, "default": ""}],
            "elements": [
                {"type": "text", "box": [1, 2, 8, 1], "content": "Always", "visible": "True"},
                {"type": "text", "box": [1, 3, 8, 1], "content": "Conditional", "visible": "{show != ''}"}
            ]
        }
        template = Template.from_data(template_data, "test-template", base_dir=temp_dir)

        # 不提供 show 变量
        rendered = template.render({})
        assert len(rendered) == 1
        assert rendered[0]["content"] == "Always"

        # 提供 show 变量
        rendered = template.render({"show": "yes"})
        assert len(rendered) == 2

    def test_from_data_with_nested_variable_in_default(self, temp_dir):
        """测试默认值中的嵌套变量"""
        template_data = {
            "vars": [
                {"name": "prefix", "required": True},
                {"name": "title", "required": False, "default": "{prefix} Title"}
            ],
            "elements": [
                {"type": "text", "box": [1, 2, 8, 1], "content": "{title}"}
            ]
        }
        template = Template.from_data(template_data, "test-template", base_dir=temp_dir)
        rendered = template.render({"prefix": "My"})
        assert rendered[0]["content"] == "My Title"

    def test_from_data_rejects_template_reference_in_elements(self, temp_dir):
        """测试元素中包含 template 字段会引发错误"""
        template_data = {
            "vars": [],
            "elements": [
                {"template": "nested-template"}  # 内联模板不支持相互引用
            ]
        }
        template = Template.from_data(template_data, "test-template", base_dir=temp_dir)
        # 渲染时应该引发错误
        with pytest.raises(YAMLError, match="内联模板不支持相互引用"):
            template.render({})

    def test_from_data_with_description(self, temp_dir):
        """测试模板描述字段"""
        template_data = {
            "description": "这是一个测试模板",
            "vars": [],
            "elements": []
        }
        template = Template.from_data(template_data, "test-template", base_dir=temp_dir)
        assert template.description == "这是一个测试模板"

    def test_from_data_without_description(self, temp_dir):
        """测试没有描述字段的模板"""
        template_data = {
            "vars": [],
            "elements": []
        }
        template = Template.from_data(template_data, "test-template", base_dir=temp_dir)
        assert template.description is None


# ============= 变量解析测试 =============


class TestResolveValue:
    """resolve_value 方法测试类"""

    def test_resolve_value_simple_variable(self, temp_dir):
        """测试解析简单变量"""
        template_data = {"vars": [], "elements": []}
        template = Template.from_data(template_data, "test", base_dir=temp_dir)
        result = template.resolve_value("{title}", {"title": "My Title"})
        assert result == "My Title"

    def test_resolve_value_multiple_variables(self, temp_dir):
        """测试解析多个变量"""
        template_data = {"vars": [], "elements": []}
        template = Template.from_data(template_data, "test", base_dir=temp_dir)
        result = template.resolve_value(
            "{title} - {subtitle}", {"title": "Main", "subtitle": "Sub"}
        )
        assert result == "Main - Sub"

    def test_resolve_value_undefined_variable_raises_error(self, temp_dir):
        """测试未定义变量会引发错误"""
        template_data = {"vars": [], "elements": []}
        template = Template.from_data(template_data, "test", base_dir=temp_dir)
        with pytest.raises(YAMLError, match="未定义的变量"):
            template.resolve_value("{undefined}", {"title": "Test"})

    def test_resolve_value_preserves_non_string(self, temp_dir):
        """测试非字符串值保持原样"""
        template_data = {"vars": [], "elements": []}
        template = Template.from_data(template_data, "test", base_dir=temp_dir)
        assert template.resolve_value(123, {}) == 123
        assert template.resolve_value(None, {}) is None
        assert template.resolve_value(["list"], {}) == ["list"]

    def test_resolve_value_converts_to_integer(self, temp_dir):
        """测试结果转换为整数"""
        template_data = {"vars": [], "elements": []}
        template = Template.from_data(template_data, "test", base_dir=temp_dir)
        result = template.resolve_value("{value}", {"value": "42"})
        assert result == 42
        assert isinstance(result, int)

    def test_resolve_value_converts_to_float(self, temp_dir):
        """测试结果转换为浮点数"""
        template_data = {"vars": [], "elements": []}
        template = Template.from_data(template_data, "test", base_dir=temp_dir)
        result = template.resolve_value("{value}", {"value": "3.14"})
        assert result == 3.14
        assert isinstance(result, float)


# ============= resolve_element 测试 =============


class TestResolveElement:
    """resolve_element 方法测试类"""

    def test_resolve_element_dict(self, temp_dir):
        """测试解析字典元素"""
        template_data = {"vars": [], "elements": []}
        template = Template.from_data(template_data, "test", base_dir=temp_dir)
        elem = {"content": "{title}", "box": [1, 2, 3, 4]}
        result = template.resolve_element(elem, {"title": "Test"})
        assert result["content"] == "Test"
        assert result["box"] == [1, 2, 3, 4]

    def test_resolve_element_list(self, temp_dir):
        """测试解析列表元素"""
        template_data = {"vars": [], "elements": []}
        template = Template.from_data(template_data, "test", base_dir=temp_dir)
        elem = ["{title}", "{subtitle}"]
        result = template.resolve_element(elem, {"title": "A", "subtitle": "B"})
        assert result == ["A", "B"]

    def test_resolve_element_nested_structure(self, temp_dir):
        """测试解析嵌套结构"""
        template_data = {"vars": [], "elements": []}
        template = Template.from_data(template_data, "test", base_dir=temp_dir)
        elem = {
            "content": "{title}",
            "font": {"size": "{size}", "color": "#000"}
        }
        result = template.resolve_element(elem, {"title": "Test", "size": "24"})
        assert result["content"] == "Test"
        assert result["font"]["size"] == 24
        assert result["font"]["color"] == "#000"

    def test_resolve_element_excludes_visible(self, temp_dir):
        """测试 visible 字段在 resolve_element 中被排除"""
        template_data = {"vars": [], "elements": []}
        template = Template.from_data(template_data, "test", base_dir=temp_dir)
        elem = {"content": "{title}", "visible": "{show}"}
        result = template.resolve_element(elem, {"title": "Test", "show": "true"})
        assert result["content"] == "Test"
        # visible 字段在 resolve_element 中被排除，在 render 中单独处理
        assert "visible" not in result


# ============= 条件评估测试 =============


class TestEvaluateCondition:
    """evaluate_condition 方法测试类"""

    def test_evaluate_condition_with_non_empty_variable(self, temp_dir):
        """测试非空变量条件"""
        template_data = {"vars": [], "elements": []}
        template = Template.from_data(template_data, "test", base_dir=temp_dir)
        result = template.evaluate_condition("{title != ''}", {"title": "Hello"})
        assert result is True

    def test_evaluate_condition_with_empty_variable(self, temp_dir):
        """测试空变量条件"""
        template_data = {"vars": [], "elements": []}
        template = Template.from_data(template_data, "test", base_dir=temp_dir)
        result = template.evaluate_condition("{title != ''}", {"title": ""})
        assert result is False

    def test_evaluate_condition_with_missing_variable(self, temp_dir):
        """测试缺失变量条件会引发错误"""
        template_data = {"vars": [], "elements": []}
        template = Template.from_data(template_data, "test", base_dir=temp_dir)
        # 缺失变量应该引发错误
        with pytest.raises(YAMLError, match="变量未定义"):
            template.evaluate_condition("{title != ''}", {})

    def test_evaluate_condition_complex_logic(self, temp_dir):
        """测试复杂逻辑条件"""
        template_data = {"vars": [], "elements": []}
        template = Template.from_data(template_data, "test", base_dir=temp_dir)
        result = template.evaluate_condition(
            "{a == 'yes' and b != ''}",
            {"a": "yes", "b": "value"}
        )
        assert result is True

    def test_evaluate_condition_member_test(self, temp_dir):
        """测试成员测试条件"""
        template_data = {"vars": [], "elements": []}
        template = Template.from_data(template_data, "test", base_dir=temp_dir)
        result = template.evaluate_condition("{type in ['A', 'B']}", {"type": "A"})
        assert result is True

    def test_evaluate_condition_math_operation(self, temp_dir):
        """测试数学运算条件"""
        template_data = {"vars": [], "elements": []}
        template = Template.from_data(template_data, "test", base_dir=temp_dir)
        # 使用整数而不是字符串进行比较
        result = template.evaluate_condition("{count > 5}", {"count": 10})
        assert result is True


# ============= 渲染测试 =============


class TestRender:
    """render 方法测试类"""

    def test_render_with_required_variable(self, temp_dir):
        """测试使用必需变量渲染"""
        template_data = {
            "vars": [{"name": "title", "required": True}],
            "elements": [
                {"type": "text", "box": [1, 2, 8, 1], "content": "{title}"}
            ]
        }
        template = Template.from_data(template_data, "test", base_dir=temp_dir)
        rendered = template.render({"title": "Hello"})
        assert len(rendered) == 1
        assert rendered[0]["content"] == "Hello"

    def test_render_with_optional_variable(self, temp_dir):
        """测试使用可选变量渲染"""
        template_data = {
            "vars": [{"name": "subtitle", "required": False, "default": ""}],
            "elements": [
                {"type": "text", "box": [1, 2, 8, 1], "content": "{subtitle}"}
            ]
        }
        template = Template.from_data(template_data, "test", base_dir=temp_dir)
        rendered = template.render({"subtitle": "Sub"})
        assert rendered[0]["content"] == "Sub"

    def test_render_without_optional_variable(self, temp_dir):
        """测试不提供可选变量时使用默认值"""
        template_data = {
            "vars": [{"name": "subtitle", "required": False, "default": "Default"}],
            "elements": [
                {"type": "text", "box": [1, 2, 8, 1], "content": "{subtitle}"}
            ]
        }
        template = Template.from_data(template_data, "test", base_dir=temp_dir)
        rendered = template.render({})
        assert rendered[0]["content"] == "Default"

    def test_render_missing_required_variable_raises_error(self, temp_dir):
        """测试缺少必需变量会引发错误"""
        template_data = {
            "vars": [{"name": "title", "required": True}],
            "elements": [
                {"type": "text", "box": [1, 2, 8, 1], "content": "{title}"}
            ]
        }
        template = Template.from_data(template_data, "test", base_dir=temp_dir)
        with pytest.raises(YAMLError, match="缺少必需变量"):
            template.render({})

    def test_render_with_default_value(self, temp_dir):
        """测试使用默认值渲染"""
        template_data = {
            "vars": [{"name": "title", "required": False, "default": "Default Title"}],
            "elements": [
                {"type": "text", "box": [1, 2, 8, 1], "content": "{title}"}
            ]
        }
        template = Template.from_data(template_data, "test", base_dir=temp_dir)
        rendered = template.render({})
        assert rendered[0]["content"] == "Default Title"

    def test_render_filters_elements_by_visible_condition(self, temp_dir):
        """测试根据 visible 条件过滤元素"""
        template_data = {
            "vars": [{"name": "show", "required": False, "default": ""}],
            "elements": [
                {"type": "text", "box": [1, 2, 8, 1], "content": "Always"},
                {"type": "text", "box": [1, 3, 8, 1], "content": "Conditional", "visible": "{show != ''}"}
            ]
        }
        template = Template.from_data(template_data, "test", base_dir=temp_dir)

        # 不显示条件元素
        rendered = template.render({})
        assert len(rendered) == 1

        # 显示条件元素
        rendered = template.render({"show": "yes"})
        assert len(rendered) == 2


# ============= 边界情况测试 =============


class TestTemplateBoundaryCases:
    """模板边界情况测试"""

    def test_nested_variable_resolution(self, temp_dir):
        """测试嵌套变量解析"""
        template_data = {
            "vars": [
                {"name": "prefix", "required": True},
                {"name": "title", "required": False, "default": "{prefix} Title"}
            ],
            "elements": [
                {"type": "text", "box": [1, 2, 8, 1], "content": "{title}"}
            ]
        }
        template = Template.from_data(template_data, "test", base_dir=temp_dir)
        rendered = template.render({"prefix": "My"})
        assert rendered[0]["content"] == "My Title"

    def test_variable_with_special_characters(self, temp_dir):
        """测试包含特殊字符的变量"""
        template_data = {
            "vars": [{"name": "text", "required": True}],
            "elements": [
                {"type": "text", "box": [1, 2, 8, 1], "content": "{text}"}
            ]
        }
        template = Template.from_data(template_data, "test", base_dir=temp_dir)
        rendered = template.render({"text": "Hello & <World>"})
        assert rendered[0]["content"] == "Hello & <World>"

    def test_variable_with_numeric_value(self, temp_dir):
        """测试数值变量"""
        template_data = {
            "vars": [{"name": "count", "required": True}],
            "elements": [
                {"type": "text", "box": [1, 2, 8, 1], "content": "Count: {count}"}
            ]
        }
        template = Template.from_data(template_data, "test", base_dir=temp_dir)
        rendered = template.render({"count": 42})
        assert rendered[0]["content"] == "Count: 42"

    def test_empty_vars_list(self, temp_dir):
        """测试空变量列表"""
        template_data = {
            "vars": [],
            "elements": [
                {"type": "text", "box": [1, 2, 8, 1], "content": "Static"}
            ]
        }
        template = Template.from_data(template_data, "test", base_dir=temp_dir)
        rendered = template.render({})
        assert len(rendered) == 1
        assert rendered[0]["content"] == "Static"

    def test_multiple_visible_conditions(self, temp_dir):
        """测试多个可见性条件"""
        template_data = {
            "vars": [
                {"name": "show_a", "required": False, "default": ""},
                {"name": "show_b", "required": False, "default": ""}
            ],
            "elements": [
                {"type": "text", "box": [1, 2, 8, 1], "content": "A", "visible": "{show_a != ''}"},
                {"type": "text", "box": [1, 3, 8, 1], "content": "B", "visible": "{show_b != ''}"}
            ]
        }
        template = Template.from_data(template_data, "test", base_dir=temp_dir)

        rendered = template.render({"show_a": "yes"})
        assert len(rendered) == 1
        assert rendered[0]["content"] == "A"

    def test_variable_in_position(self, temp_dir):
        """测试位置中的变量"""
        template_data = {
            "vars": [{"name": "x", "required": True}],
            "elements": [
                {"type": "text", "box": ["{x}", 2, 8, 1], "content": "Text"}
            ]
        }
        template = Template.from_data(template_data, "test", base_dir=temp_dir)
        rendered = template.render({"x": "5"})
        assert rendered[0]["box"][0] == 5

    def test_empty_template_elements(self, temp_dir):
        """测试空元素列表"""
        template_data = {
            "vars": [],
            "elements": []
        }
        template = Template.from_data(template_data, "test", base_dir=temp_dir)
        rendered = template.render({})
        assert len(rendered) == 0

    def test_variable_replacement_in_font(self, temp_dir):
        """测试字体属性中的变量替换"""
        template_data = {
            "vars": [{"name": "size", "required": True}],
            "elements": [
                {
                    "type": "text",
                    "box": [1, 2, 8, 1],
                    "content": "Text",
                    "font": {"size": "{size}"}
                }
            ]
        }
        template = Template.from_data(template_data, "test", base_dir=temp_dir)
        rendered = template.render({"size": "24"})
        assert rendered[0]["font"]["size"] == 24


# ============= 图片路径解析测试 =============


class TestImagePathResolution:
    """图片路径解析测试"""

    def test_render_resolves_relative_image_paths(self, temp_dir, sample_image):
        """测试渲染时解析相对图片路径"""
        template_data = {
            "vars": [],
            "elements": [
                {"type": "image", "box": [1, 2, 8, 4], "src": sample_image.name}
            ]
        }
        template = Template.from_data(template_data, "test", base_dir=temp_dir)
        rendered = template.render({})

        # 相对路径应该被解析为绝对路径
        assert Path(rendered[0]["src"]).is_absolute()
        assert rendered[0]["src"] == str(temp_dir / sample_image.name)

    def test_render_preserves_absolute_image_paths(self, temp_dir, sample_image):
        """测试渲染时保留绝对图片路径"""
        template_data = {
            "vars": [],
            "elements": [
                {"type": "image", "box": [1, 2, 8, 4], "src": str(sample_image)}
            ]
        }
        template = Template.from_data(template_data, "test", base_dir=temp_dir)
        rendered = template.render({})

        # 绝对路径应该保持不变
        assert rendered[0]["src"] == str(sample_image)

    def test_render_without_base_dir(self, temp_dir):
        """测试没有 base_dir 时不解析路径"""
        template_data = {
            "vars": [],
            "elements": [
                {"type": "image", "box": [1, 2, 8, 4], "src": "image.png"}
            ]
        }
        template = Template.from_data(template_data, "test", base_dir=None)
        rendered = template.render({})

        # 没有 base_dir 时，相对路径保持不变
        assert rendered[0]["src"] == "image.png"

    def test_render_resolves_nested_image_paths(self, temp_dir):
        """测试解析嵌套结构中的图片路径"""
        template_data = {
            "vars": [],
            "elements": [
                {
                    "type": "image",
                    "box": [1, 2, 8, 4],
                    "src": "images/logo.png"
                }
            ]
        }
        template = Template.from_data(template_data, "test", base_dir=temp_dir)
        rendered = template.render({})

        # 相对路径应该被解析
        assert Path(rendered[0]["src"]).is_absolute()
        assert rendered[0]["src"] == str(temp_dir / "images" / "logo.png")