from pydantic_settings import BaseSettings
from typing import List
import os


class Settings(BaseSettings):
    """Application settings loaded from environment variables"""

    # Server Configuration
    HOST: str = "0.0.0.0"
    PORT: int = 8000
    DEBUG: bool = True
    WORKERS: int = 4

    # Model Configuration
    DEPTH_MODEL_SMALL: str = "depth_anything_v2_vits.onnx"
    DEPTH_MODEL_LARGE: str = "depth_anything_v2_vitl.onnx"
    MODEL_CACHE_DIR: str = "./models/cache"

    # Redis Configuration
    REDIS_HOST: str = "localhost"
    REDIS_PORT: int = 6379
    REDIS_DB: int = 0
    REDIS_PASSWORD: str = ""

    # Cache Settings
    ENABLE_CACHE: bool = True
    CACHE_TTL: int = 3600

    # Processing Configuration
    MAX_IMAGE_SIZE: int = 4096
    DEFAULT_IMAGE_SIZE: int = 1024
    PREVIEW_SIZE: int = 384

    # GPU Configuration
    CUDA_VISIBLE_DEVICES: str = "0"
    USE_GPU: bool = True
    TRT_OPTIMIZATION: bool = True

    # Storage (optional)
    S3_BUCKET: str = ""
    S3_REGION: str = "us-east-1"
    AWS_ACCESS_KEY_ID: str = ""
    AWS_SECRET_ACCESS_KEY: str = ""

    # API Settings
    CORS_ORIGINS: List[str] = ["http://localhost:3000", "http://localhost:5173"]
    MAX_UPLOAD_SIZE: int = 10485760  # 10MB
    RATE_LIMIT_PER_MINUTE: int = 60

    class Config:
        env_file = ".env"
        case_sensitive = True


# Global settings instance
settings = Settings()


def get_settings() -> Settings:
    """Get application settings"""
    return settings