"""
线路状态管理模块

负责保存和读取每个线路的最新状态信息到文件中
"""
import json
import os
from datetime import datetime
from typing import Dict, List, Optional, Any
from pathlib import Path
from .config import client_infos

class LineStatusManager:
    """线路状态管理器"""
    
    def __init__(self, status_file: str = "line_status.json"):
        """
        初始化状态管理器
        
        Args:
            status_file: 状态文件路径
        """
        self.status_file = Path(status_file)
        self._ensure_status_file()
    
    def _ensure_status_file(self):
        """确保状态文件存在"""
        if not self.status_file.exists():
            self._save_status({})
    
    def _load_status(self) -> Dict[str, Any]:
        """从文件加载状态"""
        try:
            with open(self.status_file, 'r', encoding='utf-8') as f:
                return json.load(f)
        except (FileNotFoundError, json.JSONDecodeError):
            return {}
    
    def _save_status(self, status: Dict[str, Any]):
        """保存状态到文件"""
        with open(self.status_file, 'w', encoding='utf-8') as f:
            json.dump(status, f, ensure_ascii=False, indent=2)


    def get_line_status(self, line_id: int) -> Dict[str, Any]:
        """
        获取指定线路的状态
        
        Args:
            line_id: 线路ID
            
        Returns:
            Dict[str, Any]: 线路状态信息
        """
        status = self._load_status()
        line_key = str(line_id)
        
        if line_key not in status:
            return {
                "id": line_id,
                "current_ip": None,
                "last_rotate_time": None,
                "status": "inactive",
                "edge_device": None,
                "geo_location": None,
                "rotate_count": 0
            }
        
        return status[line_key]
    
    def update_line_status(self, line_id: int, **kwargs):
        """
        更新线路状态
        
        Args:
            line_id: 线路ID
            **kwargs: 要更新的状态字段
        """
        status = self._load_status()
        line_key = str(line_id)
        
        if line_key not in status:
            status[line_key] = {
                "id": line_id,
                "current_ip": None,
                "last_rotate_time": None,
                "status": "inactive",
                "edge_device": None,
                "geo_location": None,
                "rotate_count": 0
            }
        
        # 更新字段
        for key, value in kwargs.items():
            status[line_key][key] = value
        
        # 更新时间戳
        status[line_key]["last_update_time"] = datetime.now().isoformat()
        
        self._save_status(status)
    
    def get_all_lines_status(self) -> List[Dict[str, Any]]:
        """
        获取所有线路状态（仅已保存的状态）
        
        Returns:
            List[Dict[str, Any]]: 所有线路状态列表，按线路ID排序
        """
        status = self._load_status()
        lines = list(status.values())
        
        # 按线路ID排序
        lines.sort(key=lambda x: x.get("id", 0))
        
        return lines
    
    def get_all_lines_with_defaults(self) -> List[Dict[str, Any]]:
        """
        获取所有线路状态，包括默认配置的线路
        
        Returns:
            List[Dict[str, Any]]: 所有线路状态列表，包括未配置的线路
        """
        
        
        # 获取已保存的状态
        saved_status = self._load_status()
        lines = []
        
        # 遍历所有配置的线路
        for port_id, default_ip in client_infos.items():
            line_id = int(port_id)
            line_key = str(line_id)
            
            if line_key in saved_status:
                # 使用已保存的状态
                line_data = saved_status[line_key].copy()
            else:
                # 使用默认状态
                line_data = {
                    "id": line_id,
                    "current_ip": default_ip,
                    "last_rotate_time": None,
                    "status": "inactive",
                    "edge_device": None,
                    "geo_location": None,
                    "rotate_count": 0
                }
            
            lines.append(line_data)
        
        # 按线路ID排序
        lines.sort(key=lambda x: x.get("id", 0))
        
        return lines
    
    def increment_rotate_count(self, line_id: int):
        """增加轮换次数计数"""
        current_status = self.get_line_status(line_id)
        self.update_line_status(
            line_id,
            rotate_count=current_status.get("rotate_count", 0) + 1
        )


# 创建全局状态管理器实例
status_manager = LineStatusManager()

# 使用示例：
# 获取所有线路状态（仅已保存的）
# all_lines = status_manager.get_all_lines_status()
#
# 获取所有线路状态（包括默认配置）
# all_lines_with_defaults = status_manager.get_all_lines_with_defaults()