#!/usr/bin/env python3
# -*- coding: utf-8 -*-
from functools import lru_cache
from typing import Literal

from dotenv import load_dotenv
from pydantic import model_validator
from pydantic_settings import BaseSettings, SettingsConfigDict

from core.path_conf import BasePath


class Settings(BaseSettings):
    """Global Settings"""

    model_config = SettingsConfigDict(env_file=f'{BasePath}/.env', env_file_encoding='utf-8', extra='ignore')

    # Env Config
    ENVIRONMENT: Literal['dev', 'pro']

    # Env MySQL
    MYSQL_HOST: str
    MYSQL_PORT: int
    MYSQL_USER: str
    MYSQL_PASSWORD: str

    # Env Redis
    REDIS_HOST: str
    REDIS_PORT: int
    REDIS_PASSWORD: str
    REDIS_DATABASE: int

    # Env Token
    TOKEN_SECRET_KEY: str  # 密钥 secrets.token_urlsafe(32)

    # Env Opera Log
    OPERA_LOG_ENCRYPT_SECRET_KEY: str  # 密钥 os.urandom(32), 需使用 bytes.hex() 方法转换为 str

    # FastAPI
    API_V1_STR: str = '/api/v1'
    TITLE: str = '3ex AI 接口'
    VERSION: str = '0.0.1'
    DESCRIPTION: str = '3ex AI API'
    DOCS_URL: str | None = f'{API_V1_STR}/docs'
    REDOCS_URL: str | None = f'{API_V1_STR}/redocs'
    OPENAPI_URL: str | None = f'{API_V1_STR}/openapi'

    @model_validator(mode='before')
    @classmethod
    def validate_openapi_url(cls, values):
        if values['ENVIRONMENT'] == 'pro':
            values['OPENAPI_URL'] = None
        return values

    # Demo mode
    # Only GET, OPTIONS requests are allowed
    DEMO_MODE: bool = False
    DEMO_MODE_EXCLUDE: set[tuple[str, str]] = {
        ('POST', f'{API_V1_STR}/auth/login'),
        ('POST', f'{API_V1_STR}/auth/logout'),
        ('GET', f'{API_V1_STR}/auth/captcha'),
    }

    # Static Server
    STATIC_FILES: bool = False

    # Location Parse
    LOCATION_PARSE: Literal['online', 'offline', 'false'] = 'offline'

    # Limiter
    LIMITER_REDIS_PREFIX: str = 'fba:limiter'

    # DateTime
    DATETIME_TIMEZONE: str = 'Asia/Shanghai'
    DATETIME_FORMAT: str = '%Y-%m-%d %H:%M:%S'

    # MySQL
    MYSQL_ECHO: bool = False
    MYSQL_DATABASE: str = 'fba'
    MYSQL_CHARSET: str = 'utf8mb4'

    # Redis
    REDIS_TIMEOUT: int = 5

    # Token
    TOKEN_ALGORITHM: str = 'HS256'  # 算法
    TOKEN_EXPIRE_SECONDS: int = 60 * 60 * 24 * 1  # 过期时间，单位：秒
    TOKEN_REFRESH_EXPIRE_SECONDS: int = 60 * 60 * 24 * 7  # 刷新过期时间，单位：秒
    TOKEN_REDIS_PREFIX: str = 'fba:token'
    TOKEN_CALL_REDIS_PREFIX: str = 'fba:call_token'
    TOKEN_REFRESH_REDIS_PREFIX: str = 'fba:token:refresh'
    TOKEN_EXCLUDE: list[str] = [  # JWT / RBAC 白名单
        f'{API_V1_STR}/auth/login',
    ]

    JWT_USER_REDIS_EXPIRE_SECONDS: int = 60 * 60 * 24 * 7

    # Sys User
    USER_REDIS_PREFIX: str = 'fba:user'
    USER_REDIS_EXPIRE_SECONDS: int = 60 * 60 * 24 * 7

    # Log
    LOG_LEVEL: str = 'INFO'
    LOG_FORMAT: str = '<green>{time:YYYY-MM-DD HH:mm:ss.SSS}</> | <lvl>{level: <8}</> | <lvl>{message}</>'
    LOG_STDOUT_FILENAME: str = 'fba_access.log'
    LOG_STDERR_FILENAME: str = 'fba_error.log'

    # Middleware
    MIDDLEWARE_CORS: bool = True
    MIDDLEWARE_ACCESS: bool = True

    # RBAC Permission
    PERMISSION_MODE: Literal['casbin', 'role-menu'] = 'casbin'
    PERMISSION_REDIS_PREFIX: str = 'fba:permission'

    # Casbin Auth
    CASBIN_EXCLUDE: set[tuple[str, str]] = {
        ('POST', f'{API_V1_STR}/auth/logout'),
        ('POST', f'{API_V1_STR}/auth/token/new'),
    }

    # Role Menu Auth
    ROLE_MENU_EXCLUDE: list[str] = [
        'sys:monitor:redis',
        'sys:monitor:server',
    ]

    # Opera log
    OPERA_LOG_EXCLUDE: list[str] = [
        '/favicon.ico',
        DOCS_URL,
        REDOCS_URL,
        OPENAPI_URL,
        f'{API_V1_STR}/auth/login/swagger',
        f'{API_V1_STR}/auth/github/callback',
    ]
    OPERA_LOG_ENCRYPT: int = 1  # 0: AES (性能损耗); 1: md5; 2: ItsDangerous; 3: 不加密, others: 替换为 ******
    OPERA_LOG_ENCRYPT_INCLUDE: list[str] = [
        'password',
        'old_password',
        'new_password',
        'confirm_password',
    ]

    # Ip location
    IP_LOCATION_REDIS_PREFIX: str = 'fba:ip:location'
    IP_LOCATION_EXPIRE_SECONDS: int = 60 * 60 * 24 * 1  # 过期时间，单位：秒


@lru_cache
def get_settings() -> Settings:


    """获取全局配置"""
    load_dotenv()
    return Settings()


# 创建配置实例
settings = get_settings()