package services

import (
	"os"
	"strconv"
	"sync"
	"time"

	"github.com/rs/zerolog/log"
)

const (
	defaultAPISessionExpirationDuration = 5 * 60 * time.Second
	defaultPort                         = 8585
	defaultMainDir                      = "./store"
)

var env = sync.OnceValue[environment](newEnv)

type environment struct {
	adminUsername             string
	adminPassword             string
	sessionExpirationDuration time.Duration
	port                      int
	isSecure                  bool
	storeDir                  string
}

func (e environment) GetCredentials() (username, password string) {
	return e.adminUsername, e.adminPassword
}

func (e environment) GetSessionExpirationDuration() time.Duration {
	return e.sessionExpirationDuration
}

func (e environment) GetPort() int {
	return e.port
}

func (e environment) IsSecure() bool {
	return e.isSecure
}

func (e environment) GetDir() string {
	return e.storeDir
}

func newEnv() environment {
	env := environment{
		adminUsername: "test",
		adminPassword: "test",
		isSecure:      os.Getenv("API_SECURE") == "true",
	}

	sessionExpirationDuration, err := strconv.Atoi(os.Getenv("API_SESSION_EXPIRATION_DURATION"))
	env.sessionExpirationDuration = time.Duration(sessionExpirationDuration)
	if err != nil {
		log.Warn().Err(err).Dur("default", defaultAPISessionExpirationDuration).Msg("unable to load API_SESSION_EXPIRATION_DURATION, set to default")
		env.sessionExpirationDuration = defaultAPISessionExpirationDuration
	}

	port, err := strconv.Atoi(os.Getenv("API_PORT"))
	env.port = port
	if err != nil {
		log.Warn().Err(err).Int("default", defaultPort).Msg("unable to load API_PORT, set to default")
		env.port = defaultPort
	}

	storeDir := os.Getenv("API_STORE_DIR")
	if storeDir == "" {
		storeDir = defaultMainDir
	}
	env.storeDir = storeDir

	return env
}

func GetEnv() environment {
	return env()
}