"""
主验证器

协调各子验证器，执行完整的 YAML 文件验证。
"""

from pathlib import Path
from loaders.yaml_loader import load_yaml_file, validate_presentation_yaml, YAMLError
from validators.result import ValidationResult, ValidationIssue
from validators.geometry import GeometryValidator
from validators.resource import ResourceValidator
from core.elements import create_element


class Validator:
    """主验证器"""

    # 幻灯片尺寸映射（英寸）
    SLIDE_SIZES = {
        "16:9": (10, 5.625),
        "4:3": (10, 7.5),
    }

    def __init__(self):
        """初始化验证器"""
        pass

    def validate(self, yaml_path: Path, template_dir: Path = None) -> ValidationResult:
        """
        验证 YAML 文件

        Args:
            yaml_path: YAML 文件路径
            template_dir: 模板文件目录（可选）

        Returns:
            验证结果
        """
        errors = []
        warnings = []
        infos = []

        # 1. 加载 YAML
        try:
            data = load_yaml_file(yaml_path)
            validate_presentation_yaml(data, str(yaml_path))
        except YAMLError as e:
            errors.append(ValidationIssue(
                level="ERROR",
                message=str(e),
                location="",
                code="YAML_ERROR"
            ))
            return ValidationResult(
                valid=False,
                errors=errors,
                warnings=warnings,
                infos=infos
            )
        except Exception as e:
            errors.append(ValidationIssue(
                level="ERROR",
                message=f"加载 YAML 文件失败: {str(e)}",
                location="",
                code="YAML_LOAD_ERROR"
            ))
            return ValidationResult(
                valid=False,
                errors=errors,
                warnings=warnings,
                infos=infos
            )

        # 获取幻灯片尺寸
        size_str = data.get('metadata', {}).get('size', '16:9')
        slide_width, slide_height = self.SLIDE_SIZES.get(size_str, (10, 5.625))

        # 初始化子验证器
        geometry_validator = GeometryValidator(slide_width, slide_height)
        resource_validator = ResourceValidator(
            yaml_dir=yaml_path.parent,
            template_dir=template_dir
        )

        # 2. 验证每个幻灯片
        slides = data.get('slides', [])
        for slide_index, slide_data in enumerate(slides, start=1):
            # 验证模板
            template_issues = resource_validator.validate_template(slide_data, slide_index)
            self._categorize_issues(template_issues, errors, warnings, infos)

            # 验证元素
            elements = slide_data.get('elements', [])
            for elem_index, elem_dict in enumerate(elements, start=1):
                # 3. 元素级验证
                try:
                    element = create_element(elem_dict)

                    # 调用元素的 validate() 方法
                    if hasattr(element, 'validate'):
                        elem_issues = element.validate()
                        # 填充位置信息
                        for issue in elem_issues:
                            issue.location = f"幻灯片 {slide_index}, 元素 {elem_index}"
                        self._categorize_issues(elem_issues, errors, warnings, infos)

                    # 4. 几何验证
                    geom_issues = geometry_validator.validate_element(
                        element, slide_index, elem_index
                    )
                    self._categorize_issues(geom_issues, errors, warnings, infos)

                    # 5. 资源验证（图片）
                    if elem_dict.get('type') == 'image':
                        img_issues = resource_validator.validate_image(
                            element, slide_index, elem_index
                        )
                        self._categorize_issues(img_issues, errors, warnings, infos)

                except ValueError as e:
                    # 元素创建失败（__post_init__ 中的验证）
                    errors.append(ValidationIssue(
                        level="ERROR",
                        message=str(e),
                        location=f"幻灯片 {slide_index}, 元素 {elem_index}",
                        code="ELEMENT_VALIDATION_ERROR"
                    ))
                except Exception as e:
                    errors.append(ValidationIssue(
                        level="ERROR",
                        message=f"验证元素时出错: {str(e)}",
                        location=f"幻灯片 {slide_index}, 元素 {elem_index}",
                        code="ELEMENT_VALIDATION_ERROR"
                    ))

        # 返回验证结果
        return ValidationResult(
            valid=len(errors) == 0,
            errors=errors,
            warnings=warnings,
            infos=infos
        )

    def _categorize_issues(self, issues: list, errors: list, warnings: list, infos: list):
        """
        将问题按级别分类

        Args:
            issues: 问题列表
            errors: 错误列表
            warnings: 警告列表
            infos: 提示列表
        """
        for issue in issues:
            if issue.level == "ERROR":
                errors.append(issue)
            elif issue.level == "WARNING":
                warnings.append(issue)
            elif issue.level == "INFO":
                infos.append(issue)