import pytest
from pathlib import Path
from docx import Document
from src.core.style_registry import StyleRegistry

def test_apply_page_layout_all_margins():
    """Тест: все поля заданы."""
    yaml_content = """
page:
  margins:
    top: 2.0
    bottom: 2.0
    left: 3.0
    right: 1.0
styles:
  Normal:
    font:
      name: "Arial"
      size: 12
"""
    yaml_path = Path("tests/fixtures/test_layout_all.yaml")
    yaml_path.parent.mkdir(exist_ok=True)
    yaml_path.write_text(yaml_content, encoding="utf-8")

    doc = Document()
    style_reg = StyleRegistry(yaml_path)
    style_reg.apply_page_layout(doc)

    section = doc.sections[0]
    assert abs(section.top_margin.cm - 2.0) < 0.01
    assert abs(section.bottom_margin.cm - 2.0) < 0.01
    assert abs(section.left_margin.cm - 3.0) < 0.01
    assert abs(section.right_margin.cm - 1.0) < 0.01

    yaml_path.unlink(missing_ok=True)

def test_apply_page_layout_partial_margins():
    """Тест: заданы не все поля."""
    yaml_content = """
page:
  margins:
    top: 1.5
    left: 2.5
styles:
  Normal:
    font:
      name: "Arial"
      size: 12
"""
    yaml_path = Path("tests/fixtures/test_layout_partial.yaml")
    yaml_path.parent.mkdir(exist_ok=True)
    yaml_path.write_text(yaml_content, encoding="utf-8")

    doc = Document()
    style_reg = StyleRegistry(yaml_path)
    style_reg.apply_page_layout(doc)

    section = doc.sections[0]
    assert abs(section.top_margin.cm - 1.5) < 0.01
    assert abs(section.left_margin.cm - 2.5) < 0.01
    # Остальные поля не должны измениться (остаются по умолчанию)
    # У docx по умолчанию: top=2.54, bottom=2.54, left=3.17, right=3.17
    # Но мы их не трогаем, если в YAML нет

    yaml_path.unlink(missing_ok=True)

def test_apply_page_layout_no_page_section():
    """Тест: в YAML нет секции page."""
    yaml_content = """
styles:
  Normal:
    font:
      name: "Arial"
      size: 12
"""
    yaml_path = Path("tests/fixtures/test_layout_no_page.yaml")
    yaml_path.parent.mkdir(exist_ok=True)
    yaml_path.write_text(yaml_content, encoding="utf-8")

    doc = Document()
    style_reg = StyleRegistry(yaml_path)
    style_reg.apply_page_layout(doc)

    section = doc.sections[0]
    # Поля не должны измениться (остаются по умолчанию)
    # top=2.54 cm по умолчанию
    assert abs(section.top_margin.cm - 2.54) < 0.01

    yaml_path.unlink(missing_ok=True)

def test_apply_page_layout_no_margins():
    """Тест: в YAML есть page, но нет margins."""
    yaml_content = """
page:
  other_option: value
styles:
  Normal:
    font:
      name: "Arial"
      size: 12
"""
    yaml_path = Path("tests/fixtures/test_layout_no_margins.yaml")
    yaml_path.parent.mkdir(exist_ok=True)
    yaml_path.write_text(yaml_content, encoding="utf-8")

    doc = Document()
    style_reg = StyleRegistry(yaml_path)
    style_reg.apply_page_layout(doc)

    section = doc.sections[0]
    # Поля не должны измениться
    assert abs(section.top_margin.cm - 2.54) < 0.01

    yaml_path.unlink(missing_ok=True)

def test_apply_page_layout_zero_margins():
    """Тест: нулевые поля."""
    yaml_content = """
page:
  margins:
    top: 0.0
    bottom: 0.0
    left: 0.0
    right: 0.0
styles:
  Normal:
    font:
      name: "Arial"
      size: 12
"""
    yaml_path = Path("tests/fixtures/test_layout_zero.yaml")
    yaml_path.parent.mkdir(exist_ok=True)
    yaml_path.write_text(yaml_content, encoding="utf-8")

    doc = Document()
    style_reg = StyleRegistry(yaml_path)
    style_reg.apply_page_layout(doc)

    section = doc.sections[0]
    assert abs(section.top_margin.cm - 0.0) < 0.01
    assert abs(section.bottom_margin.cm - 0.0) < 0.01
    assert abs(section.left_margin.cm - 0.0) < 0.01
    assert abs(section.right_margin.cm - 0.0) < 0.01

    yaml_path.unlink(missing_ok=True)