import os
from pathlib import Path
from typing import Any, List

from pydantic import BaseSettings, validator


class Settings(BaseSettings):
    PROJECT_NAME: str = "NoteTaker"
    API_V1_STR: str = "/api/v1"
    
    # CORS Configuration
    BACKEND_CORS_ORIGINS: List[str] = ["*"]

    @validator("BACKEND_CORS_ORIGINS", pre=True)
    def assemble_cors_origins(cls, v: Any) -> List[str]:
        if isinstance(v, str) and not v.startswith("["):
            return [i.strip() for i in v.split(",")]
        return v

    # JWT Configuration
    SECRET_KEY: str = os.getenv("SECRET_KEY", "supersecretkey")
    ALGORITHM: str = "HS256"
    ACCESS_TOKEN_EXPIRE_MINUTES: int = 60 * 24 * 7  # 7 days

    # Database Configuration
    DB_DIR: Path = Path("/app") / "storage" / "db"
    SQLALCHEMY_DATABASE_URL: str = f"sqlite:///{DB_DIR}/db.sqlite"

    # File Storage Configuration
    STORAGE_DIR: Path = Path("/app") / "storage"
    ATTACHMENTS_DIR: Path = STORAGE_DIR / "attachments"
    TEMP_DIR: Path = STORAGE_DIR / "temp"

    # Create directories if they don't exist
    DB_DIR.mkdir(parents=True, exist_ok=True)
    ATTACHMENTS_DIR.mkdir(parents=True, exist_ok=True)
    TEMP_DIR.mkdir(parents=True, exist_ok=True)

    class Config:
        case_sensitive = True


settings = Settings()