backend/app/core/config.py

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

class Settings(BaseSettings):
    API_V1_STR: str = "/api/v1"
    PROJECT_NAME: str = "TalentTalk Pro"
    
    # 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)

    # Database
    DATABASE_URL: str = "sqlite+aiosqlite:///./talenttalk.db"
    
    # OpenRouter
    OPENROUTER_API_KEY: str
    GOOGLE_API_KEY: str = "" # Optional fallback or for Multimodal if valid
    
    # Voice Services
    ASSEMBLYAI_API_KEY: str = ""
    ELEVENLABS_API_KEY: str = ""
    
    # Environment
    ENVIRONMENT: str = "development"
    LOG_LEVEL: str = "INFO"

    model_config = SettingsConfigDict(
        env_file=".env",
        env_file_encoding="utf-8",
        case_sensitive=True,
        extra="ignore"
    )

settings = Settings()