"""
FontResolver 跨域引用测试
"""

import pytest
from utils.font_resolver import FontResolver
from core.elements import FontConfig


class TestFontResolverCrossDomain:
    """FontResolver 跨域引用测试类"""

    def test_document_scope_can_reference_template_fonts(self):
        """测试文档作用域可以引用模板库字体"""
        doc_fonts = {
            "title": {"family": "Arial", "size": 44}
        }
        template_fonts = {
            "base": {"family": "SimSun", "size": 18}
        }
        
        resolver = FontResolver(
            fonts=doc_fonts,
            scope="document",
            template_fonts=template_fonts
        )
        
        # 引用模板库字体
        result = resolver.resolve_font("@base")
        assert result.family == "SimSun"
        assert result.size == 18

    def test_document_scope_prioritizes_document_fonts(self):
        """测试文档作用域优先使用文档字体"""
        doc_fonts = {
            "title": {"family": "Arial", "size": 44}
        }
        template_fonts = {
            "title": {"family": "SimSun", "size": 36}
        }
        
        resolver = FontResolver(
            fonts=doc_fonts,
            scope="document",
            template_fonts=template_fonts
        )
        
        # 同名字体优先使用文档的
        result = resolver.resolve_font("@title")
        assert result.family == "Arial"
        assert result.size == 44

    def test_template_scope_cannot_reference_document_fonts(self):
        """测试模板库作用域不能引用文档字体"""
        doc_fonts = {
            "title": {"family": "Arial", "size": 44}
        }
        template_fonts = {
            "base": {"family": "SimSun", "size": 18}
        }
        
        resolver = FontResolver(
            fonts=template_fonts,
            scope="template",
            template_fonts=template_fonts
        )
        
        # 尝试引用文档字体应该失败
        with pytest.raises(ValueError, match="引用的字体配置不存在"):
            resolver.resolve_font("@title")

    def test_template_scope_can_reference_template_fonts(self):
        """测试模板库作用域可以引用模板库字体"""
        template_fonts = {
            "base": {"family": "SimSun", "size": 18},
            "title": {"parent": "@base", "size": 36}
        }
        
        resolver = FontResolver(
            fonts=template_fonts,
            scope="template",
            template_fonts=template_fonts
        )
        
        # 引用模板库字体
        result = resolver.resolve_font("@title")
        assert result.family == "SimSun"
        assert result.size == 36

    def test_cross_domain_circular_reference_detection(self):
        """测试跨域循环引用检测"""
        doc_fonts = {
            "a": {"parent": "@b"}
        }
        template_fonts = {
            "b": {"parent": "@a"}
        }
        
        resolver = FontResolver(
            fonts=doc_fonts,
            scope="document",
            template_fonts=template_fonts
        )
        
        # 应该检测到跨域循环引用
        with pytest.raises(ValueError, match="检测到.*字体引用循环"):
            resolver.resolve_font("@a")

    def test_document_parent_can_reference_template_fonts(self):
        """测试文档字体的 parent 可以引用模板库字体"""
        doc_fonts = {
            "custom": {"parent": "@base", "bold": True}
        }
        template_fonts = {
            "base": {"family": "SimSun", "size": 18}
        }
        
        resolver = FontResolver(
            fonts=doc_fonts,
            scope="document",
            template_fonts=template_fonts
        )
        
        result = resolver.resolve_font("@custom")
        assert result.family == "SimSun"
        assert result.size == 18
        assert result.bold is True

    def test_template_parent_cannot_reference_document_fonts(self):
        """测试模板库字体的 parent 不能引用文档字体"""
        doc_fonts = {
            "doc-base": {"family": "Arial", "size": 18}
        }
        template_fonts = {
            "custom": {"parent": "@doc-base", "bold": True}
        }
        
        resolver = FontResolver(
            fonts=template_fonts,
            scope="template",
            template_fonts=template_fonts
        )
        
        # 应该失败
        with pytest.raises(ValueError, match="模板元素不能引用文档的字体配置"):
            resolver.resolve_font("@custom")