"""
几何验证器

验证元素的位置和尺寸是否在页面范围内。
"""

from validators.result import ValidationIssue


# 容忍度：0.1 英寸
TOLERANCE = 0.1


class GeometryValidator:
    """几何验证器"""

    def __init__(self, slide_width: float, slide_height: float):
        """
        初始化几何验证器

        Args:
            slide_width: 幻灯片宽度（英寸）
            slide_height: 幻灯片高度（英寸）
        """
        self.slide_width = slide_width
        self.slide_height = slide_height

    def validate_element(self, element, slide_index: int, elem_index: int) -> list:
        """
        验证元素的几何属性

        Args:
            element: 元素对象
            slide_index: 幻灯片索引（从 1 开始）
            elem_index: 元素索引（从 1 开始）

        Returns:
            验证问题列表
        """
        issues = []
        location = f"幻灯片 {slide_index}, 元素 {elem_index}"

        # 检查元素边界
        if hasattr(element, 'box'):
            issues.extend(self._check_element_bounds(
                element.box, location
            ))

        # 检查表格边界
        if hasattr(element, 'position') and hasattr(element, 'col_widths'):
            if element.col_widths:
                issues.extend(self._check_table_bounds(
                    element.position, element.col_widths, location
                ))

        return issues

    def _check_element_bounds(self, box: list, location: str) -> list:
        """
        检查元素边界是否在页面范围内

        Args:
            box: [left, top, width, height]
            location: 位置信息

        Returns:
            验证问题列表
        """
        issues = []
        left, top, width, height = box
        right = left + width
        bottom = top + height

        # 检查元素是否完全在页面外
        if (right <= 0 or bottom <= 0 or
                left >= self.slide_width or top >= self.slide_height):
            issues.append(ValidationIssue(
                level="WARNING",
                message="元素完全在页面外",
                location=location,
                code="ELEMENT_COMPLETELY_OUT_OF_BOUNDS"
            ))
            return issues

        # 检查右边界
        if right > self.slide_width + TOLERANCE:
            issues.append(ValidationIssue(
                level="WARNING",
                message=f"元素右边界超出: {right:.2f} > {self.slide_width}",
                location=location,
                code="ELEMENT_OUT_OF_BOUNDS"
            ))

        # 检查下边界
        if bottom > self.slide_height + TOLERANCE:
            issues.append(ValidationIssue(
                level="WARNING",
                message=f"元素下边界超出: {bottom:.2f} > {self.slide_height}",
                location=location,
                code="ELEMENT_OUT_OF_BOUNDS"
            ))

        return issues

    def _check_table_bounds(self, position: list, col_widths: list, location: str) -> list:
        """
        检查表格边界是否在页面范围内

        Args:
            position: [left, top]
            col_widths: 列宽列表
            location: 位置信息

        Returns:
            验证问题列表
        """
        issues = []
        left, top = position
        table_width = sum(col_widths)
        right = left + table_width

        # 检查表格右边界
        if right > self.slide_width + TOLERANCE:
            issues.append(ValidationIssue(
                level="WARNING",
                message=f"表格超出页面宽度: {right:.2f} > {self.slide_width}",
                location=location,
                code="TABLE_OUT_OF_BOUNDS"
            ))

        return issues