import json
import os
from typing import Dict, Any, List

class TemplateManager:
    """接口配置模板管理类 (Interface Template Management)"""
    def __init__(self, templates_dir: str):
        self.templates_dir = templates_dir
        os.makedirs(self.templates_dir, exist_ok=True)

    def save_template(self, name: str, mapping_data: Dict[str, Any]):
        """保存接口配置模板"""
        file_path = os.path.join(self.templates_dir, f"{name}.json")
        with open(file_path, 'w', encoding='utf-8') as f:
            json.dump(mapping_data, f, indent=4, ensure_ascii=False)

    def load_template(self, name: str) -> Dict[str, Any]:
        """加载接口配置模板"""
        file_path = os.path.join(self.templates_dir, f"{name}.json")
        if not os.path.exists(file_path):
            raise FileNotFoundError(f"Template {name} not found")
        with open(file_path, 'r', encoding='utf-8') as f:
            return json.load(f)

    def list_templates(self) -> List[str]:
        """列出所有可用模板"""
        return [f.replace('.json', '') for f in os.listdir(self.templates_dir) if f.endswith('.json')]