package environment

import (
	"os"
)

// exported functions
func New(name string, defaultValue string) EnvironmentVariable {
	environmentVariable := EnvironmentVariable{
		Key:     name,
		Default: defaultValue,
		Value: func() string {
			if len(name) == 0 {
				return defaultValue
			}
			value := os.Getenv(name)
			if len(value) == 0 {
				return defaultValue
			}
			return value
		},
	}
	return environmentVariable
}

// structs
type getValue func() string

type EnvironmentVariable struct {
	Key     string
	Default string
	Value   getValue
}