"""Configuration and environment variables."""

import os

# Model configuration
MODEL_NAME = os.getenv("FACE_MODEL_NAME", "buffalo_l")
DET_SIZE = int(os.getenv("FACE_DET_SIZE", "1024"))
USE_TENSORRT = os.getenv("USE_TENSORRT", "true").lower() in ("true", "1", "yes")

# Image processing limits
MAX_DOWNLOAD_SIZE = int(os.getenv("MAX_DOWNLOAD_SIZE", 20 * 1024 * 1024))  # 20MB
MAX_IMAGE_DIMENSION = int(os.getenv("MAX_IMAGE_DIMENSION", 4096))  # 4096px (reduced from 8192)
MIN_IMAGE_DIMENSION = int(os.getenv("MIN_IMAGE_DIMENSION", 32))  # 32px
TARGET_MAX_DIMENSION = int(os.getenv("TARGET_MAX_DIMENSION", 2048))  # Downscale large images

# HTTP client settings
DOWNLOAD_TIMEOUT = float(os.getenv("DOWNLOAD_TIMEOUT", 15.0))  # 15 seconds
MAX_RETRIES = int(os.getenv("MAX_RETRIES", 3))

# HTTP connection pool settings
HTTP_POOL_MAX_CONNECTIONS = int(os.getenv("HTTP_POOL_MAX_CONNECTIONS", 100))
HTTP_POOL_MAX_KEEPALIVE = int(os.getenv("HTTP_POOL_MAX_KEEPALIVE", 20))

# Thread pool for blocking operations (GPU inference, image decode)
INFERENCE_THREADS = int(os.getenv("INFERENCE_THREADS", 4))

# TODO [PROD]: Add URL allowlist for SSRF protection
# ALLOWED_URL_PATTERNS = os.getenv("ALLOWED_URL_PATTERNS", "").split(",")

# TODO [PROD]: Add API key authentication
# API_KEY = os.getenv("API_KEY", "")

# TODO [PROD]: Add rate limiting configuration
# RATE_LIMIT_REQUESTS = int(os.getenv("RATE_LIMIT_REQUESTS", 100))
# RATE_LIMIT_WINDOW = int(os.getenv("RATE_LIMIT_WINDOW", 60))