package server

import (
	"strings"
)

func varGet(r *request, name string) {
	if v, ok := r.c.s.env.Find(name); ok {
		r.Print(v)
	} else {
		r.Fatal("no such variable")
	}
}

func varSet(r *request, name string, args ...string) {
	value := strings.Join(args, " ")

	if err := r.c.s.env.Set(name, value); err != nil {
		r.Fatal(err)
	}
}

func varPush(r *request, name string, args ...string) {
	value := strings.Join(args, " ")

	if err := r.c.s.env.Push(name, value); err != nil {
		r.Fatal(err)
	}
}

func varUnset(r *request, name string) {
	if !r.c.s.env.Del(name) {
		r.Fatal("no such variable")
	}
}

func varShow(r *request) {
	r.c.s.env.Each(func(k string, v string) bool {
		r.Println(k, v)
		return true
	})
}

func varClear(r *request) {
	r.c.s.env.Clear()
}

func init() {
	handle("get", varGet, "name")
	handle("set", varSet, "name value")
	handle("push", varPush, "name value")
	handle("unset", varUnset, "name")
	handle("env", varShow, "name")
	handle("clear", varClear, "")
}