"""
Presentation 类集成测试

测试 Presentation 类的模板加载和幻灯片渲染功能
"""

import pytest
from pathlib import Path
from core.presentation import Presentation


class TestPresentationInit:
    """Presentation 初始化测试"""

    def test_init_with_yaml(self, sample_yaml):
        """测试使用 YAML 文件初始化"""
        pres = Presentation(str(sample_yaml))
        assert pres.data is not None
        assert "slides" in pres.data

    def test_init_with_template_dir(self, sample_yaml, sample_template):
        """测试带模板目录初始化"""
        pres = Presentation(str(sample_yaml), str(sample_template))
        assert pres.templates_dir == str(sample_template)


class TestTemplateCaching:
    """模板缓存测试"""

    def test_template_is_cached(self, temp_dir, sample_template):
        """测试模板被缓存"""
        # 创建使用模板的 YAML
        yaml_content = f"""
metadata:
  size: "16:9"

slides:
  - template: title-slide
    vars:
      title: "Test"
"""
        yaml_path = temp_dir / "test.yaml"
        yaml_path.write_text(yaml_content)

        pres = Presentation(str(yaml_path), str(sample_template))

        # 第一次获取模板
        template1 = pres.get_template("title-slide")
        # 第二次获取模板
        template2 = pres.get_template("title-slide")

        # 应该是同一个实例（缓存）
        assert template1 is template2


class TestRenderSlide:
    """render_slide 方法测试"""

    def test_render_simple_slide(self, sample_yaml):
        """测试渲染简单幻灯片"""
        pres = Presentation(str(sample_yaml))
        slide_data = pres.data["slides"][0]
        rendered = pres.render_slide(slide_data)

        assert "elements" in rendered
        assert len(rendered["elements"]) > 0

    def test_render_slide_with_template(self, temp_dir, sample_template):
        """测试渲染使用模板的幻灯片"""
        yaml_content = f"""
metadata:
  size: "16:9"

slides:
  - template: title-slide
    vars:
      title: "Test Title"
      subtitle: "Test Subtitle"
"""
        yaml_path = temp_dir / "test.yaml"
        yaml_path.write_text(yaml_content)

        pres = Presentation(str(yaml_path), str(sample_template))
        slide_data = pres.data["slides"][0]
        rendered = pres.render_slide(slide_data)

        # 模板变量应该被替换
        elements = rendered["elements"]
        title_elem = next(
            e
            for e in elements
            if e.get("type") == "text" and "Test Title" in e.get("content", "")
        )
        assert title_elem is not None

    def test_render_slide_with_conditional_element(self, temp_dir, sample_template):
        """测试条件渲染元素"""
        # 有 subtitle 的情况
        yaml_with = f"""
metadata:
  size: "16:9"

slides:
  - template: title-slide
    vars:
      title: "Test"
      subtitle: "With Subtitle"
"""
        yaml_path_with = temp_dir / "test_with.yaml"
        yaml_path_with.write_text(yaml_with)

        pres_with = Presentation(str(yaml_path_with), str(sample_template))
        slide_data = pres_with.data["slides"][0]
        rendered_with = pres_with.render_slide(slide_data)

        # 应该有 2 个元素（title 和 subtitle 都显示）
        assert len(rendered_with["elements"]) == 2

        # 没有 subtitle 的情况
        yaml_without = f"""
metadata:
  size: "16:9"

slides:
  - template: title-slide
    vars:
      title: "Test"
"""
        yaml_path_without = temp_dir / "test_without.yaml"
        yaml_path_without.write_text(yaml_without)

        pres_without = Presentation(str(yaml_path_without), str(sample_template))
        slide_data = pres_without.data["slides"][0]
        rendered_without = pres_without.render_slide(slide_data)

        # 应该只有 1 个元素（subtitle 不显示）
        assert len(rendered_without["elements"]) == 1

    def test_render_slide_with_variables(self, temp_dir, sample_template):
        """测试变量传递"""
        yaml_content = f"""
metadata:
  size: "16:9"

slides:
  - template: title-slide
    vars:
      title: "My Title"
      subtitle: "My Subtitle"
"""
        yaml_path = temp_dir / "test.yaml"
        yaml_path.write_text(yaml_content)

        pres = Presentation(str(yaml_path), str(sample_template))
        slide_data = pres.data["slides"][0]
        rendered = pres.render_slide(slide_data)

        # 检查变量是否被正确替换
        elements = rendered["elements"]
        assert any("My Title" in e.get("content", "") for e in elements)
        assert any("My Subtitle" in e.get("content", "") for e in elements)


class TestPresentationWithoutTemplate:
    """无模板的演示文稿测试"""

    def test_render_direct_elements(self, temp_dir):
        """测试直接渲染元素（不使用模板）"""
        yaml_content = """
metadata:
  size: "16:9"

slides:
  - elements:
      - type: text
        box: [1, 1, 8, 1]
        content: "Direct Text"
        font:
          size: 24
"""
        yaml_path = temp_dir / "test.yaml"
        yaml_path.write_text(yaml_content)

        pres = Presentation(str(yaml_path))
        slide_data = pres.data["slides"][0]
        rendered = pres.render_slide(slide_data)

        # 元素应该直接被渲染
        assert len(rendered["elements"]) == 1
        assert rendered["elements"][0]["content"] == "Direct Text"