import os
from typing import List, Union
from pydantic_settings import BaseSettings
from pydantic import AnyHttpUrl, validator

class Settings(BaseSettings):
    PROJECT_NAME: str = "SkillSync"
    API_V1_STR: str = "/api/v1"
    SECRET_KEY: str = "changethis"
    ACCESS_TOKEN_EXPIRE_MINUTES: int = 60 * 24 * 8 
    
    # CORS
    BACKEND_CORS_ORIGINS: Union[str, List[str]] = ""

    @validator("BACKEND_CORS_ORIGINS", pre=True)
    def assemble_cors_origins(cls, v: Union[str, List[str]]) -> Union[List[str], str]:
        if isinstance(v, str):
            if not v.strip():
                return []
            if not v.startswith("["):
                return [i.strip() for i in v.split(",")]
            else:
                import json
                try:
                    return json.loads(v)
                except Exception:
                    return [v]
        elif isinstance(v, list):
            return v
        return []


    # Database
    POSTGRES_SERVER: str = "localhost"
    POSTGRES_USER: str = "postgres"
    POSTGRES_PASSWORD: str = "postgres"
    POSTGRES_DB: str = "skillsync"
    DATABASE_URL: str = "sqlite:///./sql_app.db"
    
    # AI - Groq
    GROQ_API_KEY: str = "gsk_..."

    # Supabase Auth
    SUPABASE_URL: str = "https://your-project.supabase.co"
    SUPABASE_KEY: str = "your-anon-key"
    SUPABASE_JWT_SECRET: str = "your-jwt-secret"

    class Config:
        case_sensitive = True
        env_file = ".env"
        extra = "ignore"

settings = Settings()