// Package config loads process configuration from environment variables.
package config

import "os"

// Config holds runtime settings for the API server.
type Config struct {
	HTTPAddr    string
	DatabaseURL string
	AppEnv      string
}

// Load reads configuration from the environment with safe defaults for local dev.
func Load() Config {
	return Config{
		HTTPAddr:    getenv("HTTP_ADDR", ":8080"),
		DatabaseURL: getenv("DATABASE_URL", "postgres://yuxingu:yuxingu@127.0.0.1:5432/yuxingu?sslmode=disable"),
		AppEnv:      getenv("APP_ENV", "dev"),
	}
}

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