"""
配置文件加载/保存
"""

import json
from pathlib import Path


def load_structure_from_config(config_path: Path) -> dict:
    """
    从配置文件加载表格结构
    
    Args:
        config_path: 配置文件路径
    
    Returns:
        表格结构字典
    """
    with open(config_path, 'r', encoding='utf-8') as f:
        structure = json.load(f)
    
    # 兼容旧版配置（补充缺失字段）
    if 'horizontal_lines' not in structure:
        # 从 rows 生成横线坐标
        horizontal_lines = []
        for row in structure.get('rows', []):
            horizontal_lines.append(row['y_start'])
        if structure.get('rows'):
            horizontal_lines.append(structure['rows'][-1]['y_end'])
        structure['horizontal_lines'] = horizontal_lines
    
    if 'vertical_lines' not in structure:
        # 从 columns 生成竖线坐标
        vertical_lines = []
        for col in structure.get('columns', []):
            vertical_lines.append(col['x_start'])
        if structure.get('columns'):
            vertical_lines.append(structure['columns'][-1]['x_end'])
        structure['vertical_lines'] = vertical_lines
    
    # 转换修改标记（从列表转为集合）
    if 'modified_h_lines' in structure:
        structure['modified_h_lines'] = set(structure['modified_h_lines'])
    else:
        structure['modified_h_lines'] = set()
    
    if 'modified_v_lines' in structure:
        structure['modified_v_lines'] = set(structure['modified_v_lines'])
    else:
        structure['modified_v_lines'] = set()
    
    # 转换旧版的 modified_rows/modified_cols（如果存在）
    if 'modified_rows' in structure and not structure['modified_h_lines']:
        structure['modified_h_lines'] = set(structure.get('modified_rows', []))
    if 'modified_cols' in structure and not structure['modified_v_lines']:
        structure['modified_v_lines'] = set(structure.get('modified_cols', []))
    
    return structure


def save_structure_to_config(structure: dict, output_path: Path):
    """
    保存表格结构到配置文件
    
    Args:
        structure: 表格结构字典
        output_path: 输出文件路径
    """
    save_data = {
        'rows': structure['rows'],
        'columns': structure['columns'],
        'horizontal_lines': structure.get('horizontal_lines', []),
        'vertical_lines': structure.get('vertical_lines', []),
        'row_height': structure['row_height'],
        'col_widths': structure['col_widths'],
        'table_bbox': structure['table_bbox'],
        'modified_h_lines': list(structure.get('modified_h_lines', set())),
        'modified_v_lines': list(structure.get('modified_v_lines', set()))
    }
    
    with open(output_path, 'w', encoding='utf-8') as f:
        json.dump(save_data, f, indent=2, ensure_ascii=False)