#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
配置管理模块
"""
import os
from pathlib import Path
from typing import List, Optional
from pydantic import BaseModel, Field


class AppConfig(BaseModel):
    """应用配置"""
    # 基础配置
    app_name: str = "EH-Downloader"
    app_version: str = "1.0.0"
    debug: bool = False
    
    # 服务器配置
    host: str = "0.0.0.0"
    port: int = 8000
    
    # 数据目录配置
    data_dir: str = "data"
    downloads_dir: str = "data/downloads"
    targets_file: str = "data/targets.txt"
    proxy_file: str = "data/proxy.txt"
    
    # 爬虫配置
    concurrency: int = 20
    max_page: int = 100
    retry_per_page: int = 5
    retry_per_image: int = 3
    timeout: float = 10.0
    image_timeout: float = 15.0
    
    # 日志配置
    log_level: str = "INFO"
    log_format: str = "[%(asctime)s] [%(levelname)s] %(message)s"
    
    # 文件清理配置
    cleanup_patterns: List[str] = ["**/*.log", "**/*.json"]
    cleanup_exclude: List[str] = ["data/targets.txt"]
    
    def __init__(self, **kwargs):
        super().__init__(**kwargs)
        # 确保目录存在
        self._ensure_directories()
    
    def _ensure_directories(self):
        """确保必要的目录存在"""
        Path(self.data_dir).mkdir(exist_ok=True)
        Path(self.downloads_dir).mkdir(parents=True, exist_ok=True)
    
    @property
    def targets_path(self) -> Path:
        """获取targets文件路径"""
        return Path(self.targets_file)
    
    @property
    def proxy_path(self) -> Path:
        """获取proxy文件路径"""
        return Path(self.proxy_file)
    
    def get_proxies(self) -> List[str]:
        """读取代理列表"""
        if not self.proxy_path.exists():
            return ["127.0.0.1:7890"]
        
        try:
            with open(self.proxy_path, 'r', encoding='utf-8') as f:
                proxies = [line.strip() for line in f.readlines() if line.strip()]
            return proxies if proxies else ["127.0.0.1:7890"]
        except Exception:
            return ["127.0.0.1:7890"]
    
    def get_targets(self) -> List[str]:
        """读取目标URL列表"""
        if not self.targets_path.exists():
            return []
        
        try:
            with open(self.targets_path, 'r', encoding='utf-8') as f:
                urls = [line.strip() for line in f.readlines() if line.strip()]
            # 过滤掉注释行
            return [url for url in urls if url and not url.startswith('#')]
        except Exception:
            return []


# 全局配置实例
config = AppConfig()