package repository

import (
	"joylink.club/rtsssimulation/repository/model/proto"
)

type Link struct {
	Identity

	length int64

	aRelation *TurnoutPort
	bRelation *TurnoutPort
	//组成Link的非道岔物理区段（按在link上偏移量从小到大排列）
	physicalSections []*PhysicalSection

	aKm *proto.Kilometer
	bKm *proto.Kilometer

	//Link上的模型（（非区段边界）检测点、应答器、信号机）
	devices []Identity

	////Link关联的模型，包含LinkNode
	//devicePositions []*DeviceLinkPosition
}

var _ Identity = &Link{}

func NewLink(id string) *Link {
	return &Link{
		Identity: identity{id, proto.DeviceType_DeviceType_Link},
	}
}

// GetAllPhysicalSection 获取与该link关联的所有物理区段(包括岔区非岔区)
func (l *Link) GetAllPhysicalSection() []*PhysicalSection {
	var rt []*PhysicalSection
	if l.physicalSections != nil {
		rt = append(rt, l.physicalSections...)
	}
	if l.aRelation != nil {
		rt = append(rt, l.aRelation.turnout.section)
	}
	if l.bRelation != nil {
		rt = append(rt, l.bRelation.turnout.section)
	}
	return rt
}
func (l *Link) Length() int64 {
	return l.length
}

func (l *Link) ARelation() *TurnoutPort {
	return l.aRelation
}

func (l *Link) BRelation() *TurnoutPort {
	return l.bRelation
}

func (l *Link) Devices() []Identity {
	return l.devices
}

func (l *Link) PortNum() int {
	return 2
}

func (l *Link) PhysicalSections() []*PhysicalSection {
	return l.physicalSections
}

func (l *Link) bindTurnoutPort(port proto.Port, turnoutPort *TurnoutPort) {
	switch port {
	case proto.Port_A:
		l.aRelation = turnoutPort
	case proto.Port_B:
		l.bRelation = turnoutPort
	}
	l.bindKm(turnoutPort.turnout.km, port)
}

func (l *Link) bindPhysicalSections(section *PhysicalSection) {
	l.physicalSections = append(l.physicalSections, section)
}

func (l *Link) bindKm(km *proto.Kilometer, port proto.Port) {
	switch port {
	case proto.Port_A:
		l.aKm = km
	case proto.Port_B:
		l.bKm = km
	}
}

func (l *Link) bindDevices(devices ...Identity) {
	for _, device := range devices {
		l.devices = append(l.devices, device)
	}
}

func (l *Link) findEndKm() *proto.Kilometer {
	if l.aRelation == nil {
		return l.aKm
	} else if l.bRelation == nil {
		return l.bKm
	}
	return nil
}

// 查找Link轨道尽头端的偏移量
// 如果该link未连接轨道尽头，返回false
func (l *Link) findEndOffset() (int64, bool) {
	if l.aRelation == nil {
		return 0, true
	}
	if l.bRelation == nil {
		return l.length, true
	}
	return 0, false
}

// LinkPosition link位置
type LinkPosition struct {
	link   *Link
	offset int64
}

func (l *LinkPosition) Link() *Link {
	return l.link
}

func (l *LinkPosition) Offset() int64 {
	return l.offset
}

// link端口
type LinkPort struct {
	link *Link
	port proto.Port
}

func NewLinkPort(link *Link, port proto.Port) LinkPort {
	return LinkPort{
		link: link,
		port: port,
	}
}

func (l *LinkPort) Port() proto.Port {
	return l.port
}

func (l *LinkPort) Device() PortedDevice {
	return l.link
}
func (l *LinkPort) IsPortA() bool {
	return l.port == proto.Port_A
}

type LinkRange struct {
	link  *Link
	start int64
	end   int64
}

func (l *LinkRange) Link() *Link {
	return l.link
}

func (l *LinkRange) Start() int64 {
	return l.start
}

func (l *LinkRange) End() int64 {
	return l.end
}