package main

import (
	"os"
	"time"
)

type Config struct {
	Port                   string
	APIToken               string
	PermanentWhitelistFile string
	DataDir                string
	CleanupInterval        time.Duration
	WatchInterval          time.Duration
	DBPath                 string
}

func loadConfig() Config {
	return Config{
		Port:                   getEnv("AUTH_GATE_PORT", "8080"),
		APIToken:               getEnv("AUTH_GATE_API_TOKEN", ""),
		PermanentWhitelistFile: getEnv("PERMANENT_WHITELIST_FILE", "./config/permanent_whitelist.txt"),
		DataDir:                getEnv("DATA_DIR", ". /data"),
		CleanupInterval:        parseDuration("CLEANUP_INTERVAL", 60*time.Second),
		WatchInterval:          parseDuration("WATCH_INTERVAL", 30*time.Second),
		DBPath:                 getEnv("AUTH_GATE_DB_PATH", ". /data/auth-gate.db"),
	}
}

func getEnv(key, defaultValue string) string {
	if v := os.Getenv(key); v != "" {
		return v
	}
	return defaultValue
}

func parseDuration(key string, defaultVal time.Duration) time.Duration {
	if v := os.Getenv(key); v != "" {
		d, err := time.ParseDuration(v)
		if err == nil {
			return d
		}
	}
	return defaultVal
}