"""
配置加载模块

负责读取和解析 config.toml 配置文件，提供全局配置对象。
"""
from pathlib import Path

import tomllib
from pydantic import ValidationError
from .config_models import ConfigModel, NapCatWSModel, BotModel, RedisModel, DockerModel, ImageManagerModel, MySQLModel, ReverseWSModel, ThreadingModel, BilibiliModel, LocalFileServerModel, DiscordModel, CrossPlatformModel, LoggingModel
from .utils.logger import ModuleLogger
from .utils.exceptions import ConfigError, ConfigNotFoundError, ConfigValidationError


class Config:
    """
    配置加载类，负责读取和解析 config.toml 文件
    """

    def __init__(self, file_path: str = "config.toml"):
        """
        初始化配置加载器

        :param file_path: 配置文件路径，默认为 "config.toml"
        """
        self.path = Path(file_path)
        self._model: ConfigModel
        # 创建模块专用日志记录器
        self.logger = ModuleLogger("ConfigLoader")
        self.load()

    def load(self):
        """
        加载并验证配置文件

        :raises ConfigNotFoundError: 如果配置文件不存在
        :raises ConfigValidationError: 如果配置格式不正确
        :raises ConfigError: 如果加载配置时发生其他错误
        """
        if not self.path.exists():
            self.logger.warning(f"配置文件 {self.path} 未找到，正在生成示例配置...")
            self._generate_example_config()
            self.logger.success(f"示例配置已生成: {self.path}")
            self.logger.info("请编辑配置文件后重新启动程序")

        try:
            self.logger.info(f"正在从 {self.path} 加载配置...")
            with open(self.path, "rb") as f:
                raw_config = tomllib.load(f)
            
            self._model = ConfigModel(**raw_config)
            self.logger.success("配置加载并验证成功！")

        except ValidationError as e:
            error_details = []
            for error in e.errors():
                field = " -> ".join(map(str, error["loc"]))
                error_msg = f"字段 '{field}': {error['msg']}"
                error_details.append(error_msg)
                
            validation_error = ConfigValidationError(
                message="配置验证失败"
            )
            validation_error.original_error = e
            
            self.logger.error("配置验证失败，请检查 `config.toml` 文件中的以下错误：")
            for detail in error_details:
                self.logger.error(f"  - {detail}")
            
            self.logger.log_custom_exception(validation_error)
            raise validation_error
        except tomllib.TOMLDecodeError as e:
            error = ConfigError(
                message=f"TOML解析错误: {str(e)}"
            )
            error.original_error = e
            self.logger.error(f"加载配置文件时发生TOML解析错误: {error.message}")
            self.logger.log_custom_exception(error)
            raise error
        except Exception as e:
            error = ConfigError(
                message=f"加载配置文件时发生未知错误: {str(e)}"
            )
            error.original_error = e
            self.logger.exception(f"加载配置文件时发生未知错误: {error.message}")
            self.logger.log_custom_exception(error)
            raise error

    def _generate_example_config(self):
        """
        生成示例配置文件
        """
        example_path = Path("config.example.toml")
        
        if not example_path.exists():
            self.logger.error(f"示例配置文件 {example_path} 不存在，无法生成配置")
            raise ConfigNotFoundError(message=f"示例配置文件 {example_path} 不存在")
        
        content = example_path.read_text()
        self.path.write_text(content)

    # 通过属性访问配置
    @property
    def napcat_ws(self) -> NapCatWSModel:
        """
        获取 NapCat WebSocket 配置
        """
        return self._model.napcat_ws

    @property
    def bot(self) -> BotModel:
        """
        获取 Bot 基础配置
        """
        return self._model.bot

    @property
    def redis(self) -> RedisModel:
        """
        获取 Redis 配置
        """
        return self._model.redis
    
    @property
    def mysql(self) -> MySQLModel:
        """
        获取 MySQL 配置
        """
        return self._model.mysql

    @property
    def docker(self) -> DockerModel:
        """
        获取 Docker 配置
        """
        return self._model.docker
    
    @property
    def image_manager(self) -> ImageManagerModel:
        """
        获取图片生成管理器配置
        """
        return self._model.image_manager

    @property
    def reverse_ws(self) -> ReverseWSModel:
        """
        获取反向 WebSocket 配置
        """
        return self._model.reverse_ws
    
    @property
    def threading(self) -> ThreadingModel:
        """
        获取线程管理配置
        """
        return self._model.threading
    
    @property
    def bilibili(self) -> BilibiliModel:
        """
        获取 Bilibili 配置
        """
        return self._model.bilibili
    
    @property
    def local_file_server(self) -> LocalFileServerModel:
        """
        获取本地文件服务器配置
        """
        return self._model.local_file_server

    @property
    def discord(self) -> DiscordModel:
        """
        获取 Discord 配置
        """
        return self._model.discord
    
    @property
    def cross_platform(self) -> CrossPlatformModel:
        """
        获取跨平台配置
        """
        return self._model.cross_platform
    
    @property
    def logging(self) -> LoggingModel:
        """
        获取日志配置
        """
        return self._model.logging


# 实例化全局配置对象
global_config = Config()