# app/core/settings/app.py
import logging
import sys
from typing import Any, Dict, List, Tuple, Optional

from loguru import logger
from pydantic import PostgresDsn, SecretStr, EmailStr

from app.core.logging import InterceptHandler
from app.core.settings.base import BaseAppSettings


class AppSettings(BaseAppSettings):
    # ===== 基本 FastAPI 设置 =====
    debug: bool = False
    docs_url: str = "/docs"
    openapi_prefix: str = ""
    openapi_url: str = "/openapi.json"
    redoc_url: str = "/redoc"
    title: str = "FastAPI example application"
    version: str = "0.0.0"

    # ===== 数据库 =====
    database_url: PostgresDsn
    max_connection_count: int = 10
    min_connection_count: int = 10

    # ===== 安全/JWT =====
    secret_key: SecretStr
    api_prefix: str = "/api"
    jwt_token_prefix: str = "Token"

    # ===== CORS/Host =====
    allowed_hosts: List[str] = ["*"]

    # ===== 日志 =====
    logging_level: int = logging.INFO
    loggers: Tuple[str, str] = ("uvicorn.asgi", "uvicorn.access")

    # ===== 邮件/验证码（新增配置） =====
    mail_from: EmailStr = "no-reply@example.com"

    # SMTP 基础（兼容 Py3.9：使用 Optional[...]）
    smtp_host: str = "localhost"
    smtp_port: int = 25
    smtp_user: Optional[SecretStr] = None
    smtp_password: Optional[SecretStr] = None
    smtp_tls: bool = False  # True 时将尝试 STARTTLS

    # 验证码配置
    email_code_expires_minutes: int = 10
    email_code_scenes: Tuple[str, ...] = ("register", "reset", "login")

    # ===== 管理员自动信任的邮箱（逗号分隔，登录后自动授予 admin �?=====
    admin_emails: List[str] = []

    class Config:
        validate_assignment = True

    @property
    def fastapi_kwargs(self) -> Dict[str, Any]:
        return {
            "debug": self.debug,
            "docs_url": self.docs_url,
            "openapi_prefix": self.openapi_prefix,
            "openapi_url": self.openapi_url,
            "redoc_url": self.redoc_url,
            "title": self.title,
            "version": self.version,
        }

    def configure_logging(self) -> None:
        logging.getLogger().handlers = [InterceptHandler()]
        for logger_name in self.loggers:
            logging_logger = logging.getLogger(logger_name)
            logging_logger.handlers = [InterceptHandler(level=self.logging_level)]
        logger.configure(handlers=[{"sink": sys.stderr, "level": self.logging_level}])