package game

import (
	"encoding/binary"
	"errors"
	"math"
	"net"
)

var (
	ErrUnknownAddress = errors.New("unknown address")
)

// Move updates the location and direction the client is currently moving towards.
func (game *Game) Move(data []byte, address *net.UDPAddr) error {
	player := game.players.ByAddress(address)

	if player == nil {
		return ErrUnknownAddress
	}

	player.Position.X = math.Float32frombits(binary.LittleEndian.Uint32(data))
	player.Position.Z = math.Float32frombits(binary.LittleEndian.Uint32(data[4:]))

	update := []byte(player.ID)
	update = AppendFloat(update, player.Position.X)
	update = AppendFloat(update, player.Position.Z)

	game.BroadcastOthers(PlayerMove, update, player)
	return nil
}