package key

import "github.com/nalgeon/redka/internal/redis"

// Renames a key and overwrites the destination.
// RENAME key newkey
// https://redis.io/commands/rename
type Rename struct {
	redis.BaseCmd
	Key    string
	NewKey string
}

func ParseRename(b redis.BaseCmd) (*Rename, error) {
	cmd := &Rename{BaseCmd: b}
	if len(cmd.Args()) != 2 {
		return cmd, redis.ErrInvalidArgNum
	}
	cmd.Key = string(cmd.Args()[0])
	cmd.NewKey = string(cmd.Args()[1])
	return cmd, nil
}

func (cmd *Rename) Run(w redis.Writer, red redis.Redka) (any, error) {
	err := red.Key().Rename(cmd.Key, cmd.NewKey)
	if err != nil {
		w.WriteError(cmd.Error(err))
		return nil, err
	}
	w.WriteString("OK")
	return true, nil
}