package instance

import (
	"common/proto/gen/grpc_pb"
)

// PlayerNode 定义玩家节点结构体
type PlayerNode struct {
	ID        int
	Position  [2]float64           // 二维坐标 [x, y]
	MoveCross int8                 // 移动十字，1 上 2 下 4 左 8 右
	Action    []*grpc_pb.ActionReq // 其他操作
}

// 将指令存储到玩家身上
func (p *PlayerNode) addAction(e *grpc_pb.ActionReq) {
	if e.Action < 16 {
		p.MoveCross = int8(e.Action)
	} else {
		p.Action = append(p.Action, e)
	}
}

const (
	DirUp    int8 = 1 << iota // 1 (00000001)
	DirDown                   // 2 (00000010)
	DirLeft                   // 4 (00000100)
	DirRight                  // 8 (00001000)
)

// 逻辑帧-移动
func (p *PlayerNode) logicMove() {
	if p.MoveCross&DirUp != 0 && p.MoveCross&DirDown != 0 {
		p.MoveCross &^= DirUp | DirDown
	}
	if p.MoveCross&DirLeft != 0 && p.MoveCross&DirRight != 0 {
		p.MoveCross &^= DirLeft | DirRight
	}

	var moveX, moveY float64
	if p.MoveCross&DirUp != 0 {
		moveY += 1
	}
	if p.MoveCross&DirDown != 0 {
		moveY -= 1
	}
	if p.MoveCross&DirLeft != 0 {
		moveX -= 1
	}
	if p.MoveCross&DirRight != 0 {
		moveX += 1
	}

	if moveX != 0 && moveY != 0 {
		const diagonalFactor = 0.7071
		moveX *= diagonalFactor
		moveY *= diagonalFactor
	}

	speed := 100.0
	p.Position[0] += moveX * speed
	p.Position[1] += moveY * speed
}