"""Configuration and secrets management.

Loads environment variables from .env file for API keys and other secrets.
"""
import logging
import os

from dotenv import load_dotenv

load_dotenv()

# Logging configuration
log_level = os.getenv("LOG_LEVEL", "INFO").upper()
logging.basicConfig(
    level=getattr(logging, log_level, logging.INFO),
    format="%(asctime)s %(levelname)s %(name)s %(message)s",
)

# SerpAPI key for patent search
api_key = os.getenv("API_KEY")

# OpenRouter API key for LLM analysis
openrouter_api_key = os.getenv("OPENROUTER_API_KEY")

# Database configuration - all messages are stored in the database
# The database serves as both a persistent store and a cache layer
database_url = os.getenv("DATABASE_URL", "postgresql://postgres:postgres@localhost:5432/sparc")

# Cache configuration
# When enabled (default), the system checks the database for cached responses
# before making API calls, saving tokens and reducing latency
use_cache = os.getenv("USE_CACHE", "true").lower() in ("true", "1", "yes")

# Legacy compatibility - USE_DATABASE is deprecated, database is always used
# This variable is kept for backwards compatibility but has no effect
use_database = os.getenv("USE_DATABASE", "false").lower() in ("true", "1", "yes")

# Patent search configuration
patent_search_days = int(os.getenv("PATENT_SEARCH_DAYS", "90"))
patent_thread_workers = int(os.getenv("PATENT_THREAD_WORKERS", "5"))

# LLM model to use via OpenRouter (e.g. "anthropic/claude-3.5-sonnet", "openai/gpt-4o")
model = os.getenv("MODEL", "anthropic/claude-3.5-sonnet")

# SERP cache TTL in hours (how long cached search results are considered fresh)
serp_cache_ttl_hours = int(os.getenv("SERP_CACHE_TTL_HOURS", "24"))

# Root path for running behind a reverse proxy (e.g., "/api" when served at /api/)
# This ensures OpenAPI docs work correctly when accessed via the proxy
root_path = os.getenv("ROOT_PATH", "")

# Application environment: "development", "staging", or "production"
# Used for safety checks (e.g., refusing default JWT secret in production)
app_env = os.getenv("APP_ENV", "development")

# Storage backend: "local" (default) or "s3" for S3/MinIO object storage
storage_backend = os.getenv("STORAGE_BACKEND", "local")
s3_bucket = os.getenv("S3_BUCKET", "sparc-patents")
s3_endpoint_url = os.getenv("S3_ENDPOINT_URL", "")
s3_access_key = os.getenv("AWS_ACCESS_KEY_ID", "")
s3_secret_key = os.getenv("AWS_SECRET_ACCESS_KEY", "")

# CORS allowed origins (comma-separated)
# Defaults to localhost dev origins when unset
_cors_origins_raw = os.getenv("CORS_ORIGINS", "")
cors_origins: list[str] = (
    [o.strip() for o in _cors_origins_raw.split(",") if o.strip()]
    if _cors_origins_raw
    else ["http://localhost:3000", "http://localhost:5173"]
)