package env_utils

import (
	"log"
	"os"
	"strings"

	common "nettools/common"
)

func Getenv(envName string) (env string, ok bool) {
	env = os.Getenv(envName)
	return env, env != ""
}

func MustGetenv(envName string) (env string) {
	env = os.Getenv(envName)
	if env == "" {
		log.Panicf("Panic while parsing environment variable %s: variable wasn't set or is an empty string", envName)
	}
	return env
}

func GetenvBool(envName string) (env bool, ok bool) {
	envStr := os.Getenv(envName)
	lcEnvStr := strings.ToLower(envStr)
	if lcEnvStr == "true" || lcEnvStr == "yes" || lcEnvStr == "y" {
		return true, true
	} else if lcEnvStr == "false" || lcEnvStr == "no" || lcEnvStr == "n" {
		return false, true
	}
	return false, false
}

func GetenvOrDefaultAndIsEnv(envName string, defaultVal string) (out string, isEnv bool) {
	envPlainData := os.Getenv(envName)
	if envPlainData == "" {
		return defaultVal, false
	}
	return envPlainData, true
}

func GetenvOrDefaultStr(envName string, defaultVal string) string {
	env := os.Getenv(envName)
	return common.Ternar(env != "", env, defaultVal)
}

func GetenvOrDefaultInt[i common.Int](envName string, base int, bitSize int, defaultVal i) i {
	intStr, ok := Getenv(envName)
	if !ok {
		return defaultVal
	}
	res, err := common.Str2Int[i](intStr, base, bitSize)
	if err != nil {
		return defaultVal
	}
	return res
}

func GetenvOrDefaultBool(envName string, defaultVal bool) bool {
	env, ok := GetenvBool(envName)
	return common.Ternar(ok, env, defaultVal)
}