"""Application configuration."""

from functools import lru_cache
from typing import List

from pydantic import Field
from pydantic_settings import BaseSettings, SettingsConfigDict


class Settings(BaseSettings):
    """Application settings."""

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

    # Application
    APP_NAME: str = "AudioForge"
    DEBUG: bool = False
    ENVIRONMENT: str = "development"

    # API
    API_V1_PREFIX: str = "/api/v1"
    CORS_ORIGINS: List[str] = Field(
        default=["http://localhost:3000", "http://localhost:7860"]
    )

    # Database
    # Default uses port 5433 for Docker development (mapped from container's 5432)
    DATABASE_URL: str = Field(
        default="postgresql+asyncpg://postgres:postgres@localhost:5433/audioforge"
    )
    DATABASE_ECHO: bool = False

    # Redis
    REDIS_URL: str = Field(default="redis://localhost:6379/0")
    REDIS_CACHE_TTL: int = 3600

    # Music Generation
    MUSICGEN_MODEL: str = "facebook/musicgen-small"
    MUSICGEN_DEVICE: str = "cuda"  # or "cpu"
    MUSICGEN_DURATION: int = 30  # seconds

    # Vocal Generation
    BARK_MODEL: str = "suno/bark"
    BARK_DEVICE: str = "cuda"  # or "cpu"

    # Processing
    MAX_CONCURRENT_GENERATIONS: int = 4
    GENERATION_TIMEOUT: int = 300  # seconds

    # Storage
    AUDIO_STORAGE_PATH: str = "./storage/audio"
    MAX_AUDIO_SIZE_MB: int = 100

    # Observability
    LOG_LEVEL: str = "INFO"
    ENABLE_METRICS: bool = True
    ENABLE_TRACING: bool = True
    OTEL_EXPORTER_OTLP_ENDPOINT: str | None = None

    # Security
    SECRET_KEY: str = Field(
        default="change-me-in-production-use-openssl-rand-hex-32"
    )
    ACCESS_TOKEN_EXPIRE_MINUTES: int = 30


@lru_cache()
def get_settings() -> Settings:
    """Get cached settings instance."""
    return Settings()


settings = get_settings()