package main

import (
	"fmt"
	"log"
	"time"

	webserver "git.martyn.berlin/martyn/LEDController/internal/webserver"
	queue "git.martyn.berlin/martyn/LEDController/internal/queue"
	remapping "git.martyn.berlin/martyn/LEDController/internal/remapping"
	patterns "git.martyn.berlin/martyn/LEDController/internal/patterns"

	"github.com/Hundemeier/go-sacn/sacn"
)

type RGBcolor = [3]byte

var currentFrame [2][512]byte
var channels [2]chan<-[512]byte 
var sema = make(chan struct{}, 1) // a binary semaphore guarding currentFrame

var currentEffect queue.QueueItem;
var globalEffectChannel = make(chan queue.QueueItem, 1024)

func foreverLoop() {
	for /*ever*/ {
		time.Sleep(40 * time.Millisecond) //25fps
		for u := 0; u < 2; u++ {
			sema <- struct{}{} // acquire token
			channels[u] <- currentFrame[u]
			<- sema
		}
	}
}

func reduceBrightness(universe [512]byte, percentage int) [512]byte{
	for i := range(universe) {
		universe[i] = byte(float64(universe[i]) * (float64(percentage) / float64(100)))
	}
	return universe
}

func main() {
	go func() {
		fmt.Printf("Starting webserver on port %s\n", "5353")
		webserver.HandleHTTP(globalEffectChannel)
	}()
	//instead of "" you could provide an ip-address that the socket should bind to
	trans, err := sacn.NewTransmitter("", [16]byte{1, 2}, "test")
	if err != nil {
		log.Fatal(err)
	}

	//activates the universes
	for i := 0; i < 2; i++ {
		channels[i], err =  trans.Activate(uint16(i+1))
		//deactivate the channel on exit
		defer close(channels[i])
		trans.SetMulticast(uint16(i+1), false) //this specific setup will not multicast on windows,
		trans.SetDestinations(uint16(i+1), []string{"192.168.1.139"})
	}

	// Plasma for start frame
	rearranged := remapping.SliceRearrange(68, 4, true, remapping.XYGridToLinear(68, 4, patterns.PlasmaPanel(68, 4, 40)))
	currentFrame[0] = remapping.Slice512(rearranged[0])
	currentFrame[1]	= remapping.Slice512(rearranged[1])
	var e queue.QueueItem
	e.Effect = "red"
	e.Duration = 40 * 50
	globalEffectChannel <- e
	e.Effect = "plasma"
	e.Duration = 0
	e.Speed = 40
	globalEffectChannel <- e

	go func() {
		for /*ever*/ {
			if currentEffect.Duration > 0 {
				currentEffect.Duration -= 40
			} else {
				if len(globalEffectChannel) > 0 {
					currentEffect = <- globalEffectChannel
				}
			}
			var rearranged [][]byte
			switch currentEffect.Effect {
				case "line":
					rearranged = remapping.SliceRearrange(68, 4, true, remapping.XYGridToLinear(68, 4, patterns.ZigZag(68, 4)))
				case "plasma":
					rearranged = remapping.SliceRearrange(68, 4, true, remapping.XYGridToLinear(68, 4, patterns.PlasmaPanel(68, 4, currentEffect.Speed)))
				case "red":
					rearranged = remapping.SliceRearrange(68, 4, false, remapping.XYGridToLinear(68, 4, patterns.RedPanel(68,4)))
				case "random":
					rearranged = remapping.SliceRearrange(68, 4, false, remapping.XYGridToLinear(68, 4, patterns.RandomColourPanel(68,4,currentEffect.Speed)))
				case "linearplasma":
					rearranged = remapping.SliceRearrange(68, 4, false, patterns.LinearPlasma(68*4))
				case "gradientred":
					rearranged = remapping.SliceRearrange(68, 4, false, patterns.Gradient(255, 0, 0, 0, 0, 255, 0, 68*4))
				case "sine":
					var black patterns.RGBcolor
					var red patterns.RGBcolor
					red[0] = 255
					rearranged = remapping.SliceRearrange(68, 4, true, remapping.XYGridToLinear(68, 4, patterns.Sinewave(68, 4, black, red, currentEffect.Speed)))
				case "sinechase":
					var black patterns.RGBcolor
					var red patterns.RGBcolor
					red[0] = 255
					rearranged = remapping.SliceRearrange(68, 4, true, remapping.XYGridToLinear(68, 4, patterns.SineChase(68, 4, black, red, currentEffect.Speed)))
				case "plasmapulse":
					rearranged = remapping.SliceRearrange(68, 4, false, remapping.XYGridToLinear(68, 4, patterns.PlasmaColourPanel(68,4, currentEffect.Speed)))
				case "colour":
					rearranged = remapping.SliceRearrange(68, 4, false, remapping.XYGridToLinear(68, 4, patterns.FillPanel(68,4, currentEffect.SeedColour[0], currentEffect.SeedColour[1], currentEffect.SeedColour[2])))
				case "fade":
					rearranged = remapping.SliceRearrange(68, 4, true, remapping.XYGridToLinear(68, 4, patterns.GradientPanel(68,4, currentEffect.SeedColour, currentEffect.SecondColour)))
			    default:
					rearranged = remapping.SliceRearrange(68, 4, false, remapping.XYGridToLinear(68, 4, patterns.FillPanel(68,4, 128,0,128)))
			}
			//rearranged := remapping.SliceRearrange(68,4,true,linearPlasma(68*4))
			sema <- struct{}{} // acquire token
			currentFrame[0] = reduceBrightness(remapping.Slice512(rearranged[0]),10)
			currentFrame[1]	= reduceBrightness(remapping.Slice512(rearranged[1]),10)
			<- sema
			time.Sleep(40 * time.Millisecond)
		}
	}()
	foreverLoop();
}