package npc

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

// PlayerNode 定义玩家节点结构体
type PlayerNode struct {
	UID        int   // 用户ID
	GatewaySID int64 // 网关服务ID

	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
}

func NewPlayerNode(gatewaySID int64, uid int) *PlayerNode {
	return &PlayerNode{
		UID:        uid,
		GatewaySID: gatewaySID,
		Position:   [2]float64{0, 0},
		MoveCross:  0,
		Action:     make([]*grpc_pb.ActionReq, 0),
	}
}

// AddAction 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)
)

// LogicMove 逻辑帧-移动
func (p *PlayerNode) LogicMove() bool {
	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
	}
	// 没有移动
	if moveX == 0 && moveY == 0 {
		return false
	}

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

	speed := 10.0
	p.Position[0] += moveX * speed
	p.Position[1] += moveY * speed
	if p.Position[0] < 0 {
		p.Position[0] = 0
	}
	if p.Position[0] > 400 {
		p.Position[0] = 400
	}
	if p.Position[1] < 0 {
		p.Position[1] = 0
	}
	if p.Position[1] > 400 {
		p.Position[1] = 400
	}
	return true
}