"""Application configuration via environment variables / .env file."""

from functools import lru_cache

from pydantic_settings import BaseSettings, SettingsConfigDict


class Settings(BaseSettings):
    model_config = SettingsConfigDict(env_file=".env", env_prefix="GOGO_", extra="ignore")

    # Core
    env: str = "dev"  # dev | test | prod
    secret_key: str = "dev-secret-change-me"
    base_url: str = "http://localhost:8000"  # public URL for action links / transcripts
    database_url: str = "postgresql+psycopg://gogo:gogo@localhost:5432/gogo"

    # Email (SMTP). provider=console logs instead of sending.
    email_provider: str = "console"  # console | smtp
    smtp_host: str = "localhost"
    smtp_port: int = 587
    smtp_user: str = ""
    smtp_password: str = ""
    smtp_starttls: bool = True
    email_from: str = "Gogo Telefon <noreply@gogotelefon.ba>"
    admin_alert_email: str = ""  # super-admin alerts (100% usage etc.), empty = off

    # SMS. provider=console logs instead of sending (GSM gateway impl in M5).
    sms_provider: str = "console"  # console | gsm_gateway
    gsm_gateway_url: str = ""
    gsm_gateway_user: str = ""
    gsm_gateway_password: str = ""

    # LLM
    anthropic_api_key: str = ""
    llm_model: str = "claude-haiku-4-5-20251001"  # default; per-tenant override possible

    # TTS (decided by Phase-0 PoC; both supported behind TTSProvider)
    tts_provider: str = "azure"  # azure | elevenlabs
    azure_speech_key: str = ""
    azure_speech_region: str = "westeurope"
    elevenlabs_api_key: str = ""

    # Google OAuth (Calendar free/busy)
    google_client_id: str = ""
    google_client_secret: str = ""

    # Voice pipeline (M4)
    voice_host: str = "0.0.0.0"
    voice_port: int = 9092
    recordings_dir: str = "./recordings"
    internal_token: str = "dev-internal-token"  # dialplan ↔ backend shared secret

    # Proposal engine defaults (overridable per tenant)
    proposal_ttl_hours: int = 24

    # Retention
    audio_retention_days: int = 90

    # Session cookies
    session_cookie: str = "gogo_session"
    session_max_age: int = 60 * 60 * 24 * 14  # 14 days


@lru_cache
def get_settings() -> Settings:
    return Settings()