package f5

import (
	"fmt"
	"os"
	"q5"
	"strings"
	"sync"
	"sync/atomic"
	"time"

	"github.com/gin-gonic/gin"
	"gorm.io/driver/mysql"
	"gorm.io/gorm"
)

type App interface {
	GetPkgName() string
	NewUuid() int64
	GetInstanceId() int32
	GetNodeId() int32
	GetZoneId() int32
	HasFlag(int32) bool
	AddIMMsg(uint16, q5.Args)
	RegisterIMMsgHandle(uint16, func(q5.Args))
	NotifyLoopCond()
	GetNowSeconds() int64
	GetNowMillis() int64
	GetNowNano() int64
	GetTimeOffset() int32
	SetTimeOffset(int32)
	GetLocation() *time.Location
	RegisterMainThreadCb(func())
	GetGinEngine() *gin.Engine
	RegisterOrmDb(name string, host string, port int32,
		user string, passwd string, dataBase string)
	GetOrmDb(string) *gorm.DB
}

type UserApp interface {
	GetPkgName() string
	Init()
	Update()
	UnInit()
}

type app struct {
	zoneId            int32
	nodeId            int32
	instanceId        int32
	terminated        bool
	flags             map[int32]int32
	servicing         bool
	contextHash       map[int32]q5.Args
	loopCond          *sync.Cond
	imTopNode         *IMMsgNode
	imBotNode         *IMMsgNode
	imWorkNode        *IMMsgNode
	imMsgMutex        sync.RWMutex
	chGoLoopTimerExit chan int
	chGoLoopWait      chan int64
	nowTime           time.Time
	nowUnixNano       int64
	timeOffset        int32
	location          *time.Location
	imMsgHandlers     [1024]func(q5.Args)
	maxRunDelay       int64
	maxScheduleTime   int64
	uuid              q5.Uuid
	userApp           UserApp
	ginEngine         *gin.Engine
	ormDbLock         sync.Mutex
	ormDbHash         map[string]*gorm.DB
}

func (this *app) init(userApp UserApp) {
	this.userApp = userApp
	this.nowTime = time.Now()
	this.SetTimeOffset(0)
	atomic.StoreInt64(&this.nowUnixNano, this.nowTime.UnixNano())
	_timer = new(timer)
	_timer.init()
	_sysLog = new(sysLog)
	_sysLog.init()
	_tgLog = new(tgLog)
	_tgLog.init()
	_dbFilter = new(dbFilter)
	_dbFilter.init()
	_goStyleDb = new(dbPool)
	_goStyleDb.init(GO_STYLE_DB)
	_jsStyleDb = new(dbPool)
	_jsStyleDb.init(JS_STYLE_DB)
	_httpCliMgr = new(httpCliMgr)
	_httpCliMgr.init()
	{
		tmpNodeId, tmpInstanceId := parseArgs()
		this.nodeId = int32(tmpNodeId)
		this.instanceId = int32(tmpInstanceId)
	}
	this.uuid.SetMachineId((this.nodeId-1)*MAX_NODE_ID + this.instanceId)
	this.loopCond = sync.NewCond(new(sync.Mutex))
	this.chGoLoopTimerExit = make(chan int)
	this.chGoLoopWait = make(chan int64)
	_app.RegisterIMMsgHandle(
		IM_EXEC_MAIN_THREAD_CB,
		func(args q5.Args) {
			cb := args[0].(func())
			cb()
		})
	this.outputRuningLog()
	GetSysLog().Info("node_id:%d instance_id:%d pid:%d",
		this.nodeId,
		this.instanceId,
		os.Getpid())
	this.installTimer()
	go this.goLoopTimer()
	this.ginEngine = gin.New()
	this.ginEngine.Use(gin.Recovery())
	this.userApp.Init()
}

func (this *app) unInit() {
	this.chGoLoopTimerExit <- 1
	_httpCliMgr.unInit()
	_goStyleDb.unInit()
	_jsStyleDb.unInit()
	_dbFilter.unInit()
	_timer.unInit()
	_timer = nil
	this.userApp.UnInit()
}

func (this *app) run() {
	for !this.terminated {
		this.nowTime = time.Now()
		atomic.StoreInt64(&this.nowUnixNano, this.nowTime.UnixNano())

		beginTick := q5.GetTickCount()
		_timer.update()
		this.dispatchIMMsg()
		this.userApp.Update()
		this.schedule()
		endTick := q5.GetTickCount()

		if this.maxRunDelay < endTick-beginTick {
			this.maxRunDelay = endTick - beginTick
		}
	}
}

func (this *app) NewUuid() int64 {
	return this.uuid.Generate()
}

func (this *app) GetInstanceId() int32 {
	return this.instanceId
}

func (this *app) GetNodeId() int32 {
	return this.nodeId
}

func (this *app) GetZoneId() int32 {
	return this.nodeId
}

func (this *app) GetPkgName() string {
	return this.userApp.GetPkgName()
}

func (this *app) HasFlag(flag int32) bool {
	_, ok := this.flags[flag]
	return ok
}

func (this *app) AddIMMsg(msgId uint16, params q5.Args) {
	p := new(IMMsgNode)
	p.msgId = msgId
	p.params = params

	this.imMsgMutex.Lock()
	if this.imBotNode != nil {
		this.imBotNode.next = p
		this.imBotNode = p
	} else {
		this.imTopNode = p
		this.imBotNode = p
	}
	this.imMsgMutex.Unlock()

	this.loopCond.Broadcast()
}

func (this *app) RegisterIMMsgHandle(msgId uint16, handle func(q5.Args)) {
	this.imMsgHandlers[msgId] = handle
}

func (this *app) RegisterMainThreadCb(cb func()) {
	_app.AddIMMsg(IM_EXEC_MAIN_THREAD_CB,
		[]interface{}{
			cb,
		})
}

func (this *app) goLoopTimer() {
	var waitMs int64 = 1000 * 10
	for {
		select {
		case <-this.chGoLoopTimerExit:
			return
		case waitMs = <-this.chGoLoopWait:
			if waitMs < 1 {
				waitMs = 1
			}
		case <-time.After(time.Millisecond * time.Duration(waitMs)):
			waitMs = 1000 * 10
			this.loopCond.Broadcast()
		}
	}
}

func (this *app) schedule() {
	this.chGoLoopWait <- GetTimer().GetIdleTime()
	this.loopCond.L.Lock()
	this.loopCond.Wait()
	this.loopCond.L.Unlock()
}

func (this *app) NotifyLoopCond() {
	this.loopCond.Broadcast()
}

func (this *app) GetNowSeconds() int64 {
	return this.nowUnixNano / int64(time.Second)
}

func (this *app) GetNowMillis() int64 {
	return this.nowUnixNano / int64(time.Millisecond)
}

func (this *app) GetNowNano() int64 {
	return this.nowUnixNano
}

func (this *app) GetTimeOffset() int32 {
	return this.timeOffset
}

func (this *app) SetTimeOffset(offset int32) {
	this.timeOffset = offset
	this.location = time.FixedZone("UTC-f5", int(offset))
	if this.location == nil {
		panic("SetTimeOffset error")
	}
}

func (this *app) GetLocation() *time.Location {
	return this.location
}

func (this *app) outputRuningLog() {
}

func (this *app) dispatchIMMsg() {
	this.imMsgMutex.Lock()
	this.imWorkNode = this.imTopNode
	this.imTopNode = nil
	this.imBotNode = nil
	this.imMsgMutex.Unlock()

	for this.imWorkNode != nil {
		currNode := this.imWorkNode
		this.imWorkNode = this.imWorkNode.next
		if this.imMsgHandlers[currNode.msgId] != nil {
			this.imMsgHandlers[currNode.msgId](currNode.params)
		}
	}
}

func (this *app) installTimer() {
	GetTimer().SetInterval(1000*60,
		func(ev int32, params *q5.Args) {
			if ev == q5.TIMER_EXEC_EVENT {
				GetSysLog().Info("max_run_delay:%d max_schedule_time:%d",
					_app.maxRunDelay,
					_app.maxScheduleTime)
				_app.maxRunDelay = 0
				_app.maxScheduleTime = 0
			}
		})
}

func (this *app) GetGinEngine() *gin.Engine {
	return this.ginEngine
}

func (this *app) RegisterOrmDb(name string, host string, port int32,
	user string, passwd string, dataBase string) {
	this.ormDbLock.Lock()
	defer this.ormDbLock.Unlock()
	dsn := fmt.Sprintf("%s:%s@tcp(%s:%d)/%s?charset=utf8&parseTime=True&loc=Local",
		user,
		passwd,
		host,
		port,
		dataBase)
	db, err := gorm.Open(mysql.New(mysql.Config{
		DSN: dsn,
	}), &gorm.Config{})
	if err != nil {
		panic("")
	}
	this.ormDbHash[name] = db
}

func (this *app) GetOrmDb(name string) *gorm.DB {
	this.ormDbLock.Lock()
	defer this.ormDbLock.Unlock()
	if db, ok := this.ormDbHash[name]; ok {
		return db
	} else {
		return nil
	}
}

func parseArgs() (int, int) {
	args := os.Args[1:]
	if len(args) <= 0 {
		return 0, 0
	}
	var nodeId, instanceId int
	for i := 0; i < len(args); i++ {
		arg := args[i]
		if strings.HasPrefix(arg, "-n") {
			if len(arg) > 2 {
				fmt.Sscanf(arg[2:], "%d", &nodeId)
			} else if i+1 < len(args) {
				fmt.Sscanf(args[i+1], "%d", &nodeId)
				i++
			}
		} else if strings.HasPrefix(arg, "-i") {
			if len(arg) > 2 {
				fmt.Sscanf(arg[2:], "%d", &instanceId)
			} else if i+1 < len(args) {
				fmt.Sscanf(args[i+1], "%d", &instanceId)
				i++
			}
		}
	}

	return nodeId, instanceId
}