package logic

import (
	"ecs/proto"
	"github.com/oylshe1314/framework/client/db"
	"github.com/oylshe1314/framework/client/rpc"
	"github.com/oylshe1314/framework/errors"
	"github.com/oylshe1314/framework/log"
	"github.com/oylshe1314/framework/server"
	"github.com/oylshe1314/framework/util"
	"go.mongodb.org/mongo-driver/bson"
	"go.mongodb.org/mongo-driver/mongo"
	"go.mongodb.org/mongo-driver/mongo/options"
	"sort"
	"sync"
	"time"
)

type manager struct {
	server server.Server
}

func (this *manager) Logger() log.Logger {
	return this.server.Logger()
}

const tableSetting = "setting"

type Setting struct {
	Id          uint32   `bson:"_id"`
	Version     string   `bson:"version"`
	LoginClosed bool     `bson:"login_closed"`
	TimedClose  bool     `bson:"timed_closed"`
	CloseTime   int64    `bson:"close_time"`
	ClosedList  []uint32 `bson:"closed_list"`
	WhiteList   []uint64 `bson:"white_list"`
}

const tableNotice = "notice"

type Notice struct {
	Id        uint64 `bson:"_id"`
	Type      string `json:"type"`
	Title     string `bson:"title"`
	Content   string `bson:"content"`
	BeginTime int64  `bson:"begin_time"`
	EndTime   int64  `bson:"end_time"`
}

type GateManager struct {
	manager

	setting *Setting

	closeTime  int64
	closeMutex sync.Mutex
	closeTimer *time.Timer

	mongoClient   db.MongoClient
	httpRpcClient rpc.HttpRpcClient
}

func NewGateManager(svr server.Server, mongoClient db.MongoClient, httpRpcClient rpc.HttpRpcClient) *GateManager {
	return &GateManager{
		manager: manager{
			server: svr,
		},
		mongoClient:   mongoClient,
		httpRpcClient: httpRpcClient,
	}
}

func (this *GateManager) Init() error {
	setting, err := this.querySetting()
	if err != nil {
		return err
	}
	if setting != nil {
		this.setSetting(setting)
	}
	return nil
}

func (this *GateManager) Close() error {
	return nil
}

func (this *GateManager) querySetting() (*Setting, error) {
	var setting = &Setting{Id: this.server.AppId()}
	var err = this.mongoClient.Collection(tableSetting).FindOne(this.mongoClient.Context(), bson.M{"_id": setting.Id}).Decode(setting)
	if err != nil {
		if errors.Is(err, mongo.ErrNoDocuments) {
			return nil, nil
		}
		return nil, err
	}
	return setting, nil
}

func (this *GateManager) GetSetting() *Setting {
	return this.setting
}

func (this *GateManager) SetSetting(setting *Setting) error {
	var err = this.saveSetting(setting)
	if err != nil {
		this.Logger().Error(err)
		return proto.ErrInternalError
	}
	this.setSetting(setting)
	return nil
}

func (this *GateManager) saveSetting(setting *Setting) error {
	var updateOption = options.Update().SetUpsert(true)
	_, err := this.mongoClient.Collection(tableSetting).UpdateByID(this.mongoClient.Context(), setting.Id, bson.M{"$set": setting}, updateOption)
	return err
}

func (this *GateManager) setSetting(setting *Setting) {

	this.setting = setting

	if setting.LoginClosed {
		var now = util.NowUnix()

		this.closeMutex.Lock()
		if this.closeTimer != nil {
			if this.closeTime == setting.CloseTime || now >= setting.CloseTime {
				this.closeMutex.Unlock()
				return
			}
			this.closeTimer.Stop()
			this.closeTime = 0
			this.closeTimer = nil
		}
		this.closeMutex.Unlock()

		var f = func() {
			this.closeMutex.Lock()
			this.closeTime = 0
			this.closeTimer = nil
			this.closeMutex.Unlock()

			ar, err := this.httpRpcClient.AllPost("game", "/server/close", nil, nil, nil)
			if err != nil {
				this.Logger().Errorf("Http get error, error: %v", err)
			} else {
				for appId, result := range ar {
					if result.Err != nil {
						this.Logger().Errorf("[game_1:%d] <- Server offline error, %v", appId, result.Err)
						continue
					}

					if result.Res.Status != errors.StatusSuccessful {
						this.Logger().Errorf("[game_1:%d] <- Server offline failed, %s", appId, result.Res.Message)
						continue
					}
				}
			}
		}

		if !setting.TimedClose || util.NowUnix() >= setting.CloseTime {
			f()
		} else {
			this.closeMutex.Lock()
			this.closeTime = setting.CloseTime
			this.closeTimer = time.AfterFunc(time.Second*time.Duration(setting.CloseTime-now), f)
			this.closeMutex.Unlock()
		}
	} else {
		this.closeMutex.Lock()
		if this.closeTimer != nil {
			this.closeTimer.Stop()
			this.closeTime = 0
			this.closeTimer = nil
		}
		this.closeMutex.Unlock()
	}
}

type gameServerInfo struct {
	appId   uint32
	address string
	online  uint32
}

type gameServerList struct {
	id       uint32
	platform uint32
	channel  uint32
	area     string
	name     string
	online   uint32
	roleLv   uint32

	serverList []*gameServerInfo
}

func (this *GateManager) GetServerList(platform uint32, channel uint32, userId uint64, recentServer uint32) ([]*proto.GameServer, error) {
	var setting = this.GetSetting()

	var whiteList = map[uint64]struct{}{}
	var closedList = map[uint32]struct{}{}
	if setting != nil && setting.LoginClosed {
		if !setting.TimedClose || util.NowUnix() >= setting.CloseTime {
			for _, whiteId := range setting.WhiteList {
				whiteList[whiteId] = struct{}{}
			}

			if len(setting.ClosedList) == 0 {
				if _, ok := whiteList[userId]; !ok {
					return nil, proto.ErrServerMaintain
				}
			}

			for _, closedId := range setting.ClosedList {
				closedList[closedId] = struct{}{}
			}
		}
	}

	ar, err := this.httpRpcClient.AllPost("game", "/server/info", nil, &proto.MsgServerInfoReq{UserId: userId}, &proto.MsgServerInfoAck{})
	if err != nil {
		return nil, proto.ErrServerMaintain
	}

	var listMap = map[uint32]*gameServerList{}
	for appId, reply := range ar {
		if reply.Err != nil {
			this.Logger().Error("Get server online failed, ", reply.Err)
			continue
		}

		if reply.Res.Error() != nil {
			this.Logger().Errorf("Get server online failed, status: %d, message: %s", reply.Res.Status, reply.Res.Message)
			continue
		}

		var node = this.httpRpcClient.Node("game", appId)
		if node == nil {
			continue
		}

		var infoAck = reply.Res.Data.(*proto.MsgServerInfoAck)

		if platform != 0 {
			if infoAck.Platform != platform {
				continue
			}
		}

		if channel != 0 {
			if infoAck.Channel != channel {
				continue
			}
		}

		if _, closed := closedList[infoAck.Id]; closed {
			if _, white := whiteList[userId]; !white {
				continue
			}
		}

		var gsl = listMap[infoAck.Id]
		if gsl == nil {
			gsl = &gameServerList{
				id:       infoAck.Id,
				platform: infoAck.Platform,
				channel:  infoAck.Channel,
				area:     infoAck.Area,
				name:     infoAck.Name,
				roleLv:   infoAck.RoleLv,
			}
			listMap[infoAck.Id] = gsl
		}
		gsl.online += infoAck.Online
		gsl.serverList = append(gsl.serverList, &gameServerInfo{appId: appId, address: node.Exter.Address, online: infoAck.Online})
	}

	var serverList []*proto.GameServer
	for _, gsl := range listMap {
		if len(gsl.serverList) == 0 {
			continue
		}

		sort.Slice(gsl.serverList, func(i, j int) bool {
			if gsl.serverList[i].online == gsl.serverList[j].online {
				return gsl.serverList[i].appId < gsl.serverList[j].appId
			} else {
				return gsl.serverList[i].online < gsl.serverList[j].online
			}
		})

		serverList = append(serverList, &proto.GameServer{
			Id:      gsl.id,
			Area:    gsl.area,
			Name:    gsl.name,
			Address: gsl.serverList[0].address,
			Online:  gsl.online,
			Recent:  gsl.id == recentServer,
			RoleLv:  gsl.roleLv,
		})
	}

	sort.Slice(serverList, func(i, j int) bool {
		return serverList[i].Id < serverList[j].Id
	})

	return serverList, nil
}

func (this *GateManager) GetNotice() ([]*Notice, error) {
	var now = util.NowUnix()
	cur, err := this.mongoClient.Collection(tableNotice).Find(this.mongoClient.Context(), bson.M{"begin_time": bson.M{"$lt": now}, "end_time": bson.M{"$gt": now}})
	if err != nil {
		if errors.Is(err, mongo.ErrNoDocuments) {
			return nil, nil
		}
		return nil, err
	}

	defer cur.Close(this.mongoClient.Context())

	var notices []*Notice
	for cur.Next(this.mongoClient.Context()) {
		var notice = new(Notice)
		err = cur.Decode(notice)
		if err != nil {
			return nil, err
		}
		notices = append(notices, notice)
	}
	return notices, nil
}

func (this *GateManager) AddNotice(notice *Notice) error {
	_, err := this.mongoClient.Collection(tableNotice).InsertOne(this.mongoClient.Context(), notice)
	return err
}

func (this *GateManager) DeleteNotice(id uint64) error {
	_, err := this.mongoClient.Collection(tableNotice).DeleteOne(this.mongoClient.Context(), bson.M{"_id": id})
	return err
}