"""
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_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.type == "text" and "Test Title" in e.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.content for e in elements)
        assert any("My Subtitle" in e.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"


class TestPresentationPathResolution:
    """路径解析测试"""

    def test_relative_path_resolution(self, temp_dir):
        """测试相对路径解析（子目录场景）"""
        # 创建子目录结构
        subdir = temp_dir / "subdir"
        subdir.mkdir()

        yaml_content = """
metadata:
  size: "16:9"

slides:
  - elements:
      - type: text
        box: [1, 1, 8, 1]
        content: "Test"
"""
        yaml_path = subdir / "test.yaml"
        yaml_path.write_text(yaml_content)

        # 使用相对路径初始化
        import os
        original_cwd = os.getcwd()
        try:
            os.chdir(temp_dir)
            pres = Presentation("subdir/test.yaml")

            # 验证路径已被解析为绝对路径
            assert pres.pres_base_dir.is_absolute()
            assert pres.pres_base_dir == subdir
        finally:
            os.chdir(original_cwd)

    def test_template_path_resolution(self, temp_dir):
        """测试模板路径解析（子目录场景）"""
        # 创建子目录结构
        doc_dir = temp_dir / "docs"
        template_dir = temp_dir / "templates"
        doc_dir.mkdir()
        template_dir.mkdir()

        # 创建模板库文件
        template_content = """
metadata:
  size: "16:9"

templates:
  test-template:
    vars:
      - name: title
        required: true
    elements:
      - type: text
        box: [1, 1, 8, 1]
        content: "{title}"
"""
        template_path = template_dir / "templates.yaml"
        template_path.write_text(template_content)

        # 创建文档文件
        yaml_content = """
metadata:
  size: "16:9"

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

        # 使用相对路径初始化
        import os
        original_cwd = os.getcwd()
        try:
            os.chdir(temp_dir)
            pres = Presentation("docs/test.yaml", template_file="templates/templates.yaml")

            # 验证路径已被解析为绝对路径
            assert pres.pres_base_dir.is_absolute()
            assert pres.template_base_dir.is_absolute()
            assert pres.pres_base_dir == doc_dir
            assert pres.template_base_dir == template_dir
        finally:
            os.chdir(original_cwd)