from typing import List, Union, Optional
from pydantic import AnyHttpUrl, field_validator
from pydantic_settings import BaseSettings, SettingsConfigDict

class Settings(BaseSettings):
    PROJECT_NAME: str = "Summit 14 Peaks"
    API_V1_STR: str = "/api/v1"
    ENVIRONMENT: str = "development"
    
    # Database
    POSTGRES_SERVER: str
    POSTGRES_USER: str
    POSTGRES_PASSWORD: str
    POSTGRES_DB: str
    POSTGRES_PORT: str
    DATABASE_URL: str

    # Redis
    REDIS_URL: str
    REDIS_HOST: str = "localhost"
    REDIS_PORT: int = 6379
    REDIS_DB: int = 0
    
    # App
    PORT: int = 8000
    
    # Security
    SECRET_KEY: str
    ALGORITHM: str = "HS256"
    ACCESS_TOKEN_EXPIRE_MINUTES: int = 1440
    
    # CORS
    BACKEND_CORS_ORIGINS: List[AnyHttpUrl] = []

    @field_validator("BACKEND_CORS_ORIGINS", mode="before")
    def assemble_cors_origins(cls, v: Union[str, List[str]]) -> List[str]:
        if isinstance(v, str) and not v.startswith("["):
            return [i.strip() for i in v.split(",")]
        elif isinstance(v, (list, str)):
            return v
        raise ValueError(v)

    # Static Files
    UPLOAD_DIR: str
    STATIC_URL_PREFIX: str

    model_config = SettingsConfigDict(
        case_sensitive=True,
        env_file=".env",
        extra="ignore"
    )

settings = Settings()