package cluster

import (
	"github.com/hdt3213/godis/interface/redis"
	"github.com/hdt3213/godis/redis/reply"
)

// Rename renames a key, the origin and the destination must within the same node
func Rename(cluster *Cluster, c redis.Connection, args [][]byte) redis.Reply {
	if len(args) != 3 {
		return reply.MakeErrReply("ERR wrong number of arguments for 'rename' command")
	}
	src := string(args[1])
	dest := string(args[2])

	srcPeer := cluster.peerPicker.PickNode(src)
	destPeer := cluster.peerPicker.PickNode(dest)

	if srcPeer != destPeer {
		return reply.MakeErrReply("ERR rename must within one slot in cluster mode")
	}
	return cluster.relay(srcPeer, c, args)
}

// RenameNx renames a key, only if the new key does not exist.
// The origin and the destination must within the same node
func RenameNx(cluster *Cluster, c redis.Connection, args [][]byte) redis.Reply {
	if len(args) != 3 {
		return reply.MakeErrReply("ERR wrong number of arguments for 'renamenx' command")
	}
	src := string(args[1])
	dest := string(args[2])

	srcPeer := cluster.peerPicker.PickNode(src)
	destPeer := cluster.peerPicker.PickNode(dest)

	if srcPeer != destPeer {
		return reply.MakeErrReply("ERR rename must within one slot in cluster mode")
	}
	return cluster.relay(srcPeer, c, args)
}