package http

import (
	"errors"
	"fmt"
	"github.com/siddontang/ledisdb/ledis"
	"strings"
)

const (
	ERR_ARGUMENT_FORMAT = "wrong number of arguments for '%s' command"
	MSG_OK              = "OK"
)

var (
	ErrValue  = errors.New("value is not an integer or out of range")
	ErrSyntax = errors.New("syntax error")
)

type commandFunc func(*ledis.DB, ...string) (interface{}, error)

var regCmds = map[string]commandFunc{}

func register(name string, f commandFunc) {
	if _, ok := regCmds[strings.ToLower(name)]; ok {
		panic(fmt.Sprintf("%s has been registered", name))
	}
	regCmds[name] = f
}

func lookup(name string) commandFunc {
	return regCmds[strings.ToLower(name)]

}