package env

import (
	"os"
	"strconv"
	"strings"
)

func Get(name string, val string) string {
	value := strings.TrimSpace(os.Getenv(name))
	if value == "" {
		return val
	} else {
		return value
	}
}

func Getter(val string, names ...string) string {
	var (
		value string
	)
	for _, name := range names {
		if value = strings.TrimSpace(os.Getenv(name)); value != "" {
			return value
		}
	}
	return val
}

func Int(name string, val int64) int64 {
	value := Get(name, "")
	if n, err := strconv.ParseInt(value, 10, 64); err == nil {
		return n
	} else {
		return val
	}
}

func Integer(val int64, names ...string) int64 {
	value := Getter("", names...)
	if n, err := strconv.ParseInt(value, 10, 64); err == nil {
		return n
	} else {
		return val
	}
}

func Float(name string, val float64) float64 {
	value := Get(name, "")
	if n, err := strconv.ParseFloat(value, 64); err == nil {
		return n
	} else {
		return val
	}
}

func Set(name string, val string) {
	value := os.Getenv(name)
	if value == "" {
		os.Setenv(name, val)
	}
}