package modelimpl

import (
	"sync/atomic"

	"joylink.club/rtsssimulation/modelrepo/dto"
	"joylink.club/rtsssimulation/modelrepo/model"
)

// link生成uid基础值
var link_uid_base = atomic.Uint32{}

var _link model.Link = (*Link)(nil)

// 轨道链路
type Link struct {
	uid       model.Uid
	PaTurnout *Turnout           // A端关联道岔,可能为nil
	PbTurnout *Turnout           // B端关联道岔,可能为nil
	PaGlb     dto.GLB            // A端公里标
	PbGlb     dto.GLB            // B端公里标
	Length    int64              // 长度
	Models    []model.Model      // 关联的模型,从A到B排序
	Sections  []*PhysicalSection // 关联的物理区段(包含道岔物理区段),从A到B排序
}

// GetLength implements model.Link.
func (l *Link) GetLength() int64 {
	return l.Length
}

// GetPaTurnout implements model.Link.
func (l *Link) GetPaTurnout() model.Points {
	return l.PaTurnout
}

// GetPbTurnout implements model.Link.
func (l *Link) GetPbTurnout() model.Points {
	return l.PbTurnout
}

// Next implements model.Link.
func (*Link) Next(port model.Link_Port, tpos model.PointsPosition) *model.LinkPort {
	panic("unimplemented")
}

// Type implements model.Link.
func (l *Link) Type() model.ModelType {
	return model.ModelType_Link
}

// Uid implements model.Link.
func (l *Link) Uid() model.Uid {
	return l.uid
}

func NewLink() *Link {
	return &Link{}
}

// link偏移
type LinkOffset struct {
	link   *Link
	offset int64
}

// link偏移范围
type LinkRange struct {
	link  *Link
	start int64
	end   int64
}