from pydantic import computed_field
from pydantic_settings import BaseSettings, SettingsConfigDict


class Settings(BaseSettings):
    app_name: str = "Urmi API"
    environment: str = "development"
    database_url: str = "postgresql+psycopg://urmi:urmi@localhost:5432/urmi"
    frontend_origin: str = "http://localhost:5173"
    # Comma-separated browser origins for CORS (defaults to frontend_origin only)
    cors_origins: str = ""
    auth_secret: str = "change-me-in-production"
    auth_cookie_secure: bool = False
    access_token_minutes: int = 60 * 24 * 7
    google_client_id: str = ""
    google_client_secret: str = ""
    google_redirect_uri: str = "http://localhost:8000/api/v1/auth/google/callback"
    admin_username: str = "root"
    admin_password: str = "Nishtha#01"
    upload_dir: str = "uploads"
    kyc_template_path: str = "assets/kyc-template.docx"
    dlt_loa_template_path: str = "assets/dlt-loa-template.docx"
    max_upload_bytes: int = 10 * 1024 * 1024
    ultronsms_base_url: str = "https://ultronsms.com"
    ultronsms_user: str = ""
    ultronsms_password: str = ""
    redis_url: str = "redis://localhost:6379/0"
    voice_relay_public_url: str = "ws://localhost:8000/api/v1/voice"
    bonvoice_token: str = ""
    bonvoice_api_url: str = "https://backend.pbx.bonvoice.com/autoDialManagement/autoCallBridging/"
    bonvoice_media_allowlist: str = "103.131.25.5"
    voice_session_ttl_seconds: int = 600
    whatsapp_api_version: str = "v21.0"
    whatsapp_verify_token: str = ""
    whatsapp_app_secret: str = ""
    whatsapp_access_token: str = ""
    whatsapp_phone_number_id: str = ""
    whatsapp_business_account_id: str = ""
    meta_app_id: str = ""
    meta_embedded_signup_config_id: str = ""
    whatsapp_business_phone: str = "919411257916"
    # Public HTTPS base for webhook callback (no trailing slash), e.g. https://urmiai.com
    public_api_base_url: str = ""

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

    @computed_field  # type: ignore[prop-decorator]
    @property
    def cors_allowed_origins(self) -> list[str]:
        configured = [item.strip() for item in self.cors_origins.split(",") if item.strip()]
        if configured:
            return configured
        return [self.frontend_origin]


    @computed_field  # type: ignore[prop-decorator]
    @property
    def whatsapp_webhook_url(self) -> str:
        base = self.public_api_base_url.rstrip("/") if self.public_api_base_url else ""
        if base:
            return f"{base}/api/v1/whatsapp/webhook"
        return "/api/v1/whatsapp/webhook"


settings = Settings()