#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
Scene文件点位映射表提取器
从.scene文件中提取points字段的站点名称（name）和id的映射关系
"""

import json
import csv
import os
import sys
from datetime import datetime
import argparse


class ScenePointsExtractor:
    def __init__(self):
        self.scene_data = None
        self.points_mapping = []
    
    def load_scene_file(self, scene_path):
        """加载Scene文件"""
        try:
            with open(scene_path, 'r', encoding='utf-8') as f:
                self.scene_data = json.load(f)
            print(f"Scene文件加载成功: {scene_path}")
            return True
        except FileNotFoundError:
            print(f"文件不存在: {scene_path}")
            return False
        except json.JSONDecodeError as e:
            print(f"Scene文件格式错误: {e}")
            return False
        except Exception as e:
            print(f"加载Scene文件失败: {e}")
            return False
    
    def extract_points_mapping(self):
        """提取points字段的映射关系"""
        if not self.scene_data or 'points' not in self.scene_data:
            print("Scene数据中未找到points字段")
            return False
        
        points = self.scene_data['points']
        if not points:
            print("points字段为空")
            return False
        
        print(f"开始提取站点映射关系，共{len(points)}个站点")
        
        self.points_mapping = []
        
        for i, point in enumerate(points, 1):
            mapping = {
                'sequence': i,
                'name': point.get('name', ''),
                'id': point.get('id', '')
            }
            
            self.points_mapping.append(mapping)
        
        print(f"站点映射提取完成，共{len(self.points_mapping)}个站点")
        return True
    
    def generate_csv_report(self, output_path):
        """生成CSV格式的映射表"""
        if not self.points_mapping:
            print("没有映射数据可导出")
            return False
        
        try:
            with open(output_path, 'w', newline='', encoding='utf-8-sig') as csvfile:
                fieldnames = ['sequence', 'name', 'id']
                writer = csv.DictWriter(csvfile, fieldnames=fieldnames)
                
                # 写入表头
                writer.writeheader()
                
                # 写入数据
                for mapping in self.points_mapping:
                    writer.writerow(mapping)
            
            print(f"CSV映射表生成完成: {output_path}")
            return True
        except Exception as e:
            print(f"生成CSV文件失败: {e}")
            return False
    

    
    def print_summary(self):
        """打印映射关系摘要"""
        if not self.points_mapping:
            print("没有映射数据")
            return
        
        print("\n" + "=" * 60)
        print("站点映射摘要")
        print("=" * 60)
        print(f"总站点数: {len(self.points_mapping)}")
        
        # 显示前10个站点示例
        print(f"\n前10个站点示例:")
        print(f"{'序号':<6} {'名称':<20} {'ID':<15}")
        print("-" * 45)
        for i, mapping in enumerate(self.points_mapping[:10]):
            print(f"{mapping['sequence']:<6} {mapping['name']:<20} {mapping['id']:<15}")
        
        if len(self.points_mapping) > 10:
            print(f"... 还有 {len(self.points_mapping) - 10} 个站点")
        
        print("=" * 60)
    
    def process(self, scene_path, output_dir="output"):
        """处理Scene文件并生成映射表"""
        self.source_file = scene_path
        
        print("开始提取Scene文件站点映射")
        print("=" * 60)
        
        # 1. 加载Scene文件
        if not self.load_scene_file(scene_path):
            return False
        
        # 2. 提取映射关系
        if not self.extract_points_mapping():
            return False
        
        # 3. 打印摘要
        self.print_summary()
        
        # 4. 创建输出目录
        if not os.path.exists(output_dir):
            os.makedirs(output_dir)
        
        # 5. 生成CSV格式的报告
        scene_name = os.path.splitext(os.path.basename(scene_path))[0]
        timestamp = datetime.now().strftime('%Y%m%d_%H%M%S')
        
        # CSV格式
        csv_path = os.path.join(output_dir, f"{scene_name}_PointsMapping_{timestamp}.csv")
        self.generate_csv_report(csv_path)
        
        print("\n" + "=" * 60)
        print("处理完成！生成的文件:")
        print(f"CSV格式: {csv_path}")
        print("=" * 60)
        
        return True


def main():
    parser = argparse.ArgumentParser(description='Scene文件站点映射表提取器')
    parser.add_argument('scene_path', help='Scene文件路径')
    parser.add_argument('-o', '--output', default='output', help='输出目录（默认: output）')
    
    args = parser.parse_args()
    
    # 检查Scene文件是否存在
    if not os.path.exists(args.scene_path):
        print(f"Scene文件不存在: {args.scene_path}")
        sys.exit(1)
    
    # 创建提取器并处理
    extractor = ScenePointsExtractor()
    success = extractor.process(args.scene_path, args.output)
    
    if success:
        print("\n✅ 提取成功完成！")
        sys.exit(0)
    else:
        print("\n❌ 提取失败！")
        sys.exit(1)


if __name__ == "__main__":
    main()