package main

import (
	"context"
	"flag"
	"fmt"
	"log"
	"os"
	"time"

	"alox.tool/api"
	"alox.tool/eventbus"
	"alox.tool/frontend"
	"alox.tool/testrunner"
	"alox.tool/uart"
)

var (
	Tests bool
)

func main() {
	flag.BoolVar(&Tests, "t", false, "Tests")

	flag.Parse()
	config := Config{
		Port:     8000,
		Host:     "0.0.0.0",
		UartPort: "/dev/ttyUSB0",
		//Baudrate: 115200,
		Baudrate: 921600,
	}
	if Tests {
		StartTests(config)
		return
	}
	StartApp(config)
}

func StartTests(config Config) {
	bus := eventbus.New()
	com, err := uart.Connect(bus, config.UartPort, config.Baudrate)
	if err != nil {
		log.Printf("Could not Connect with Uart Device %v", err)
	}
	defer com.Close()

	tr := testrunner.New(bus, com)

	testTest1 := make(map[string]func() error)
	testTest1["Echo Test"] = tr.RunEchoTest
	testTest1["Version Test"] = tr.RunVersionTest
	testTest1["Info Test"] = tr.RunClientInfoTest
	testTest1["Input Test"] = tr.RunClientInputTest

	tr.RunTestSet(testTest1)
}

func StartApp(config Config) {
	bus := eventbus.New()
	com, err := uart.Connect(bus, config.UartPort, config.Baudrate)
	if err != nil {
		log.Printf("Could not Connect with Uart Device %v", err)
	}
	defer com.Close()

	update, err := os.ReadFile("../espAlox.bin")
	if err != nil {
		log.Printf("Could not read Update file %v", err)
		return
	}
	updateSlices := SliceUpdate(update, 200)

	oManager := NewOTAManager(bus, com, updateSlices)
	ctx, cancle := context.WithCancel(context.Background())
	defer cancle()

	StartMessageHandling(ctx, bus)
	oManager.StartUpdateHandler(ctx)

	time.Sleep(time.Millisecond * 5)

	//tr := testrunner.New(bus, com)
	//tr.RunVersionTest()

	time.Sleep(time.Millisecond * 5)

	com.Send(api.CmdEcho, make([]byte, 0))
	com.Send(api.CmdVersion, make([]byte, 0))
	com.Send(api.CmdClientInfo, make([]byte, 0))
	com.Send(api.CmdClientInput, make([]byte, 0))

	//com.Send(api.CmdOtaStart, make([]byte, 0))
	com.Send(api.CmdOtaStartEspNow, make([]byte, 0))

	url := fmt.Sprintf("%s:%d", config.Host, config.Port)
	fserver := frontend.New(bus)
	fserver.Start(url)
}

func StartMessageHandling(ctx context.Context, bus eventbus.EventBus) {

	RXC := bus.Subscribe(api.TopicUARTRx)
	defer bus.Unsubscribe(api.TopicUARTRx, RXC)
	TXC := bus.Subscribe(api.TopicUARTTx)
	defer bus.Unsubscribe(api.TopicUARTTx, TXC)

	go func() {
		for {
			select {
			case <-ctx.Done():
				return
			case _ = <-TXC:
				//log.Printf("MSG[TX]: % X", msg)
			case msg := <-RXC:
				//log.Printf("MSG[RX]: % X", msg)
				val, ok := msg.(api.Frame)
				if !ok {
					log.Printf("val is not type api.Frame its %T", val)
					continue
				}
				log.Printf("[%d] Frame: %X, % X", val.Time, val.ID, val.Data)

				switch val.ID {
				case api.CmdEcho:
					log.Printf("Echo %v", val)
				case api.CmdVersion:
					v, err := uart.ParseFrameVersion(val)
					if err != nil {
						log.Printf("Could not Parse Version %v", err)
						continue
					}
					log.Printf("Version Info %d %s", v.Version, v.Buildhash)
				case api.CmdClientInfo:
					v, err := uart.ParseFrameClientInfo(val)
					if err != nil {
						log.Printf("Could not Parse Client Info %v", err)
						continue
					}
					for _, c := range v {
						log.Printf("Client ID  %d", c.ClientID)
						log.Printf("\tIsAvailable %d", c.IsAvailable)
						log.Printf("\tLastPing %d", c.LastPing)
						log.Printf("\tLastSuccessfulPing %d", c.LastSuccessfulPing)
						log.Printf("\tSlotIsUsed %d", c.SlotIsUsed)
						log.Printf("\tVersion %d", c.Version)
						log.Printf("\tMACAddr % X", c.MACAddr)
					}
				case api.CmdClientInput:
					v, err := uart.ParseFrameClientInput(val)
					if err != nil {
						log.Printf("Could not Parse Client Input %v", err)
						continue
					}
					for _, c := range v {
						log.Printf("Client ID  %d", c.ClientID)
						log.Printf("\tX %f", c.X)
						log.Printf("\tY %f", c.Y)
						log.Printf("\tBitmask %08b", c.InputMask)
					}
				case api.CmdOtaPayload:
					v, err := uart.ParseFrameOtaPayload(val)
					if err != nil {
						log.Printf("Could not Parse Client Input %v", err)
						continue
					}
					bus.Publish(api.TopicOTA, v)
					log.Printf("%v", v)
				case api.CmdOtaStatus:
					v, err := uart.ParseFrameOtaStatus(val)
					if err != nil {
						log.Printf("Could not Parse Client Input %v", err)
						continue
					}
					bus.Publish(api.TopicOTA, v)
					log.Printf("%v", v)
					// Update State Machine

				case api.CmdOtaStart:
					v, err := uart.ParseFrameOtaStart(val)
					if err != nil {
						log.Printf("Could not Parse Client Input %v", err)
						continue
					}
					bus.Publish(api.TopicOTA, v)
					log.Printf("%v", v)
				case api.CmdOtaEnd:
					v, err := uart.ParseFrameOtaEnd(val)
					if err != nil {
						log.Printf("Could not Parse Client Input %v", err)
						continue
					}
					bus.Publish(api.TopicOTA, v)
					log.Printf("%v", v)
				case api.CmdOtaStartEspNow:
					v, err := uart.ParseFrameOtaStartEspNow(val)
					if err != nil {
						log.Printf("Could not Parse Client Input %v", err)
						continue
					}
					bus.Publish(api.TopicOTA, v)
					log.Printf("%v", v)
				}
			}
		}
	}()
}

func SliceUpdate(update []byte, maxlen int) [][]byte {
	updateSlices := [][]byte{}
	for i := 0; i < len(update); i += 200 {
		end := min(i+200, len(update))
		updateSlices = append(updateSlices, update[i:end])
	}
	return updateSlices
}