package gameserver

import (
	"fmt"
	"math"

	"ananta-ps/pkg/protocol"
)

// Both movement RPCs carry a List7Bit of inline structs. LogicAgentSyncData
// has no MoveId; SimpleMoveActionData adds one byte after the two vectors.
func (s *Server) handleMovementReport(sess *Session, pkt *protocol.RpcPacket, simple bool) error {
	r := protocol.NewUxReader(pkt.Body)
	mark, err := r.U8()
	if err != nil {
		return err
	}
	if mark == 0 && r.Remaining() == 0 {
		return sess.ReturnEmptyOk(pkt.InvokeID, pkt.MethodID)
	}
	if mark != 0xff {
		return fmt.Errorf("invalid movement list marker")
	}
	count, err := r.Int7()
	if err != nil {
		return err
	}
	size := 32
	if simple {
		size++
	}
	if count > r.Remaining()/size || count*size != r.Remaining() {
		return fmt.Errorf("invalid movement sample count")
	}
	x, y, z, yaw := sess.posX, sess.posY, sess.posZ, sess.facing
	for i := 0; i < count; i++ {
		id, _ := r.U64()
		var v [6]float32
		for j := range v {
			v[j], err = r.F32()
			if err != nil || math.IsNaN(float64(v[j])) || math.IsInf(float64(v[j]), 0) {
				return fmt.Errorf("invalid movement coordinate")
			}
		}
		if simple {
			_, _ = r.U8()
		}
		if id == sess.unitId {
			x, y, z, yaw = v[0], v[1], v[2], v[4]
		}
	}
	sess.posX, sess.posY, sess.posZ, sess.facing = x, y, z, yaw
	return sess.ReturnEmptyOk(pkt.InvokeID, pkt.MethodID)
}