"""Typed application settings: the only reader of environment variables."""

from enum import StrEnum

from pydantic_settings import BaseSettings, SettingsConfigDict


class AppMode(StrEnum):
    """Runtime mode: live Spotify + Anthropic, or fixture-replay demo."""

    LIVE = "live"
    DEMO = "demo"


class Settings(BaseSettings):
    """Application settings, loaded from the environment or a .env file."""

    model_config = SettingsConfigDict(env_file=".env", extra="ignore")

    app_mode: AppMode = AppMode.DEMO
    spotify_client_id: str = ""
    spotify_redirect_uri: str = "http://127.0.0.1:8888/callback"
    spotify_api_base_url: str = "https://api.spotify.com/v1"
    spotify_timeout_seconds: float = 10.0
    spotify_retry_after_cap_seconds: float = 5.0
    session_cookie_secure: bool = False
    anthropic_api_key: str = ""
    llm_model: str = "claude-sonnet-5"
    intent_effort: str = "low"
    rerank_effort: str = "medium"
    candidate_count: int = 35
    rerank_count: int = 15
    rerank_pool_buffer: int = 5
    grounding_concurrency: int = 6
    grounding_floor: int = 8
    title_similarity_threshold: float = 0.82
    request_deadline_seconds: float = 25.0
    resolution_cache_ttl_seconds: float = 3600.0
    resolution_cache_max_entries: int = 2048
    taste_profile_ttl_seconds: float = 900.0
    playlist_name_prefix: str = "discovery-by-llm"
    spotify_seed_refresh_token: str = ""
    top_items_limit: int = 50
    saved_tracks_limit: int = 100


settings = Settings()