package config

import "os"

type Config struct {
	HTTPAddr      string
	DBDSN         string
	StoreBackend  string
	RunMigrations bool
}

func FromEnv() Config {
	addr := os.Getenv("HTTP_ADDR")
	if addr == "" {
		addr = ":8080"
	}

	dbDSN := os.Getenv("DB_DSN")
	storeBackend := os.Getenv("STORE_BACKEND")
	if storeBackend == "" {
		if dbDSN != "" {
			storeBackend = "postgres"
		} else {
			storeBackend = "memory"
		}
	}

	runMigrations := true
	if os.Getenv("RUN_MIGRATIONS") == "false" {
		runMigrations = false
	}

	return Config{
		HTTPAddr:      addr,
		DBDSN:         dbDSN,
		StoreBackend:  storeBackend,
		RunMigrations: runMigrations,
	}
}