from __future__ import annotations

from pydantic import field_validator
from pydantic_settings import BaseSettings, SettingsConfigDict


class Settings(BaseSettings):
    model_config = SettingsConfigDict(
        env_file=".env",
        env_file_encoding="utf-8",
        case_sensitive=False,
    )

    # ── Application ──────────────────────────────────
    APP_NAME: str = "core-api"
    APP_ENV: str = "development"
    DEBUG: bool = True
    SECRET_KEY: str = "change-me-to-a-random-secret-key"
    API_V1_PREFIX: str = "/api/v1"

    # ── MariaDB ──────────────────────────────────────
    MARIADB_HOST: str = "127.0.0.1"
    MARIADB_PORT: int = 3306
    MARIADB_USER: str = "root"
    MARIADB_PASSWORD: str = "changeme"
    MARIADB_DATABASE: str = "core_api"

    @property
    def MARIADB_DSN(self) -> str:
        return (
            f"mysql+aiomysql://{self.MARIADB_USER}:{self.MARIADB_PASSWORD}"
            f"@{self.MARIADB_HOST}:{self.MARIADB_PORT}/{self.MARIADB_DATABASE}"
        )

    @property
    def MARIADB_DSN_SYNC(self) -> str:
        return (
            f"mysql+pymysql://{self.MARIADB_USER}:{self.MARIADB_PASSWORD}"
            f"@{self.MARIADB_HOST}:{self.MARIADB_PORT}/{self.MARIADB_DATABASE}"
        )

    # ── MongoDB ──────────────────────────────────────
    MONGODB_URL: str = "mongodb://127.0.0.1:27017"
    MONGODB_DATABASE: str = "core_api"

    # ── Redis ────────────────────────────────────────
    REDIS_URL: str = "redis://127.0.0.1:6379/0"

    # ── JWT ──────────────────────────────────────────
    JWT_SECRET_KEY: str = "change-me-jwt-secret"
    JWT_ALGORITHM: str = "HS256"
    JWT_ACCESS_TOKEN_EXPIRE_MINUTES: int = 30
    JWT_REFRESH_TOKEN_EXPIRE_DAYS: int = 7

    # ── MQTT ─────────────────────────────────────────
    MQTT_HOST: str = "127.0.0.1"
    MQTT_PORT: int = 1883
    MQTT_USERNAME: str = ""
    MQTT_PASSWORD: str = ""

    # ── Celery ───────────────────────────────────────
    CELERY_BROKER_URL: str = "redis://127.0.0.1:6379/1"
    CELERY_RESULT_BACKEND: str = "redis://127.0.0.1:6379/2"

    # ── CORS ─────────────────────────────────────────
    CORS_ORIGINS: list[str] = ["http://localhost:3000", "http://localhost:8080"]

    @field_validator("CORS_ORIGINS", mode="before")
    @classmethod
    def assemble_cors_origins(cls, v: str | list[str]) -> list[str]:
        if isinstance(v, str):
            return [i.strip() for i in v.strip("[]").split(",") if i.strip()]
        return v

    # ── OAuth ────────────────────────────────────────
    GOOGLE_CLIENT_ID: str = ""
    GOOGLE_CLIENT_SECRET: str = ""
    KAKAO_CLIENT_ID: str = ""
    KAKAO_CLIENT_SECRET: str = ""
    NAVER_CLIENT_ID: str = ""
    NAVER_CLIENT_SECRET: str = ""

    # ── SMTP ─────────────────────────────────────────
    SMTP_HOST: str = "smtp.gmail.com"
    SMTP_PORT: int = 587
    SMTP_USERNAME: str = ""
    SMTP_PASSWORD: str = ""

    # ── Logging ──────────────────────────────────────
    LOG_LEVEL: str = "DEBUG"


settings = Settings()