package message_server

import (
	"fmt"
	"time"

	"google.golang.org/protobuf/proto"
	"joylink.club/bj-rtsts-server/message_server/ms_api"
	"joylink.club/bj-rtsts-server/ts/protos/graphicData"
	"joylink.club/bj-rtsts-server/ts/protos/state"
	"joylink.club/bj-rtsts-server/ts/simulation/wayside/memory"
	"joylink.club/ecs"
	"joylink.club/rtsssimulation/component"
	"joylink.club/rtsssimulation/entity"
)

// 信号平面布置图消息服务
type SfpMs struct {
	vs      *memory.VerifySimulation
	mapId   int32
	channel string
}

func NewSfpMs(vs *memory.VerifySimulation, mapId int32) *SfpMs {
	return &SfpMs{
		vs:      vs,
		mapId:   mapId,
		channel: fmt.Sprintf("simulation-%s_%d-devices-status", vs.SimulationId, mapId),
	}
}

// 获取通道名
func (ms *SfpMs) GetChannel() string {
	return ms.channel
}

// 发送消息间隔时间,单位ms
func (ms *SfpMs) GetInterval() time.Duration {
	return 200 * time.Millisecond
}

// 定时发送的消息
func (ms *SfpMs) OnTick() ([]*ms_api.TopicMsg, error) {
	turnoutStates, err := ms.collectTurnoutStates()
	if err != nil {
		return nil, err
	}
	trainStates, err := ms.collectTrainStates()
	if err != nil {
		return nil, err
	}
	signalStates, err := ms.collectSignalStates()
	if err != nil {
		return nil, err
	}
	buttonStates, err := ms.collectStationButtonStates()
	if err != nil {
		return nil, err
	}
	psdStates, err := ms.collectPsdStates()
	if err != nil {
		return nil, err
	}
	sectionStates, err := ms.collectSectionStates()
	if err != nil {
		return nil, err
	}
	ststes := &state.PushedDevicesStatus{
		All: true,
		AllStatus: &state.AllDevicesStatus{
			SwitchState:  turnoutStates,
			TrainState:   trainStates,
			SignalState:  signalStates,
			ButtonState:  buttonStates,
			PsdState:     psdStates,
			SectionState: sectionStates,
		},
	}
	b, err := proto.Marshal(ststes)
	if err != nil {
		return nil, fmt.Errorf("信号布置图设备状态消息服务数据序列化失败, %s", err)
	}
	return []*ms_api.TopicMsg{ms_api.NewTopicMsg(ms.channel, b)}, nil
}

func (ms *SfpMs) OnError(err error) {
	// TODO: 错误处理
}

// 收集屏蔽门状态
func (ms *SfpMs) collectPsdStates() ([]*state.PsdState, error) {
	world := ms.vs.World
	uidStructure := memory.QueryUidStructure[*memory.StationUidStructure](ms.mapId)
	data := memory.QueryGiData[*graphicData.RtssGraphicStorage](ms.mapId)
	var psdStateArr []*state.PsdState
	for _, door := range data.ScreenDoors {
		uid := uidStructure.PsdIds[door.Common.Id].Uid
		psdEntry, ok := entity.GetEntityByUid(world, uid)
		if ok {
			var amount int32
			psdState := component.PsdStateType.Get(psdEntry)
			if psdState.Km8 {
				amount = 8
			} else if psdState.Km4 {
				amount = 4
			} else {
				amount = 0
			}
			start, end := getStartEndCodeByGroup(door, amount)
			var openSubDoor []int32
			for i := start; i <= end; i++ {
				openSubDoor = append(openSubDoor, i)
			}
			psdStateArr = append(psdStateArr, &state.PsdState{
				Id:            door.Common.Id,
				OpenDoorCodes: openSubDoor,
			})
		}
	}
	return psdStateArr, nil
}

func getStartEndCodeByGroup(door *graphicData.ScreenDoor, groupAmount int32) (int32, int32) {
	for _, group := range door.ScreenDoorGroupList {
		if group.TrainGroupAmount == groupAmount {
			return group.StartSmallDoor, group.EndSmallDoor
		}
	}
	return 0, -1
}

// 收集区段状态
func (ms *SfpMs) collectSectionStates() ([]*state.SectionState, error) {
	uidMap := memory.QueryMapUidMapByType(ms.mapId, &graphicData.Section{})
	var sectionArr []*state.SectionState
	for _, u := range uidMap {
		s := handlerSectionState(ms.vs.World, u.Uid)
		if s == nil {
			continue
		}
		s.Id = u.CommonId
		sectionArr = append(sectionArr, s)
	}
	return sectionArr, nil
}

func handlerSectionState(w ecs.World, uid string) *state.SectionState {
	entry, ok := entity.GetEntityByUid(w, uid)
	if !ok {
		//fmt.Printf("id=%s的信号机不存在", uid)
		return nil
	}
	if entry.HasComponent(component.AxleSectionTag) { //计轴区段
		sectionState := &state.SectionState{}
		axleState := component.AxleSectionStateType.Get(entry)
		sectionState.Occupied = axleState.Occ
		sectionState.Type = state.SectionType_Axle
		return sectionState
	}
	return nil
}

// 收集车站按钮状态
func (ms *SfpMs) collectStationButtonStates() ([]*state.ButtonState, error) {
	// 获取地图上的按钮状态
	uidMap := memory.QueryMapUidMapByType(ms.mapId, &graphicData.EsbButton{})
	var btnStateArr []*state.ButtonState
	for _, u := range uidMap {
		entry, ok := entity.GetEntityByUid(ms.vs.World, u.Uid)
		if !ok {
			return nil, fmt.Errorf("ESB按钮实体不存在: World id=%d, uid=%s", ms.vs.World.Id(), u.Uid)
		}
		if entry.HasComponent(component.ButtonTag) { // 按钮
			bit := component.BitStateType.Get(entry)
			btnStateArr = append(btnStateArr, &state.ButtonState{Id: u.CommonId, Down: bit.Val})
		}
	}
	return btnStateArr, nil
}

// 收集信号机状态
func (ms *SfpMs) collectSignalStates() ([]*state.SignalState, error) {
	uidMap := memory.QueryMapUidMapByType(ms.mapId, &graphicData.Signal{})
	var signalArr []*state.SignalState
	for _, u := range uidMap {
		s, err := handlerSignalState(ms.vs.World, u.Uid)
		if err != nil {
			return nil, err
		}
		s.Id = u.CommonId
		signalArr = append(signalArr, s)
	}
	return signalArr, nil
}

func handlerSignalState(w ecs.World, uid string) (*state.SignalState, error) {
	entry, ok := entity.GetEntityByUid(w, uid)
	if !ok {
		return nil, fmt.Errorf("信号机不存在: World id=%d, 信号机id=%s", w.Id(), uid)
	}
	if !entry.HasComponent(component.SignalLightsType) { //信号机灯列表
		return nil, fmt.Errorf("信号机没有SignalLights组件: World id=%d, 信号机id=%s", w.Id(), uid)
	}
	signalState := &state.SignalState{}
	lights := component.SignalLightsType.Get(entry)
	isL := false
	isH := false
	isU := false
	isA := false
	isB := false
	for _, light := range lights.Lights {
		switch {
		case light.HasComponent(component.LdTag):
			isL = component.BitStateType.Get(light).Val
		case light.HasComponent(component.HdTag):
			isH = component.BitStateType.Get(light).Val
		case light.HasComponent(component.UdTag):
			isU = component.BitStateType.Get(light).Val
		case light.HasComponent(component.BdTag):
			isB = component.BitStateType.Get(light).Val
		case light.HasComponent(component.AdTag):
			isA = component.BitStateType.Get(light).Val
		}
	}
	if isH && isU {
		signalState.Aspect = state.Signal_HU
	} else {
		switch {
		case isL:
			signalState.Aspect = state.Signal_L
		case isH:
			signalState.Aspect = state.Signal_H
		case isU:
			signalState.Aspect = state.Signal_U
		case isB:
			signalState.Aspect = state.Signal_B
		case isA:
			signalState.Aspect = state.Signal_A
		}
	}
	return signalState, nil
}

// 收集列车状态
func (ms *SfpMs) collectTrainStates() ([]*state.TrainState, error) {
	allTrainMap := &ms.vs.Memory.Status.TrainStateMap
	var trainArr []*state.TrainState
	allTrainMap.Range(func(_, v any) bool {
		trainArr = append(trainArr, v.(*state.TrainState))
		return true
	})
	return trainArr, nil
}

// 收集道岔状态
func (ms *SfpMs) collectTurnoutStates() ([]*state.SwitchState, error) {
	s := ms.vs
	uidMap := memory.QueryMapUidMapByType(ms.mapId, &graphicData.Turnout{})
	var switchArr []*state.SwitchState
	for _, u := range uidMap {
		entry, ok := entity.GetEntityByUid(s.World, u.Uid)
		if !ok {
			return nil, fmt.Errorf("道岔不存在: World id=%d,道岔id=%s", s.World.Id(), u.Uid)
		}
		if !entry.HasComponent(component.TurnoutPositionType) {
			return nil, fmt.Errorf("道岔没有TurnoutPosition组件: World id=%d,道岔id=%s", s.World.Id(), u.Uid)
		}
		pos := component.TurnoutPositionType.Get(entry)
		s := &state.SwitchState{
			Id:      u.CommonId,
			Normal:  pos.Db,
			Reverse: pos.Fb,
			Dw:      pos.Dw,
			Fw:      pos.Fw,
		}
		switchArr = append(switchArr, s)
	}
	return switchArr, nil
}