package window

import (
	"fyne.io/fyne/v2"
	"fyne.io/fyne/v2/canvas"
	"fyne.io/fyne/v2/container"
	"fyne.io/fyne/v2/lang"
	"fyne.io/fyne/v2/theme"
	"fyne.io/fyne/v2/widget"
	"git.kor-elf.net/kor-elf/gui-for-ffmpeg/internal/application/convertor"
	"git.kor-elf.net/kor-elf/gui-for-ffmpeg/internal/ffmpeg"
	"image/color"
	"strconv"
	"strings"
)

type QueueLayoutContract interface {
	GetItemsContainer() *fyne.Container
	GetQueueStatistics() QueueStatisticsAllContract

	AddQueue(key int, queue *convertor.Queue)
	ChangeQueue(key int, queue *convertor.Queue)
	RemoveQueue(key int, status convertor.StatusContract)
}

type queueLayout struct {
	itemsContainer     *fyne.Container
	queueAllStatistics QueueStatisticsAllContract
	items              map[int]queueLayoutItem
	ffmpegService      ffmpeg.UtilitiesContract
}

func NewQueueLayout(ffmpegService ffmpeg.UtilitiesContract) QueueLayoutContract {
	items := map[int]queueLayoutItem{}

	return &queueLayout{
		itemsContainer:     container.NewVBox(),
		queueAllStatistics: newQueueAllStatistics(&items),
		items:              items,
		ffmpegService:      ffmpegService,
	}
}

func (l *queueLayout) GetItemsContainer() *fyne.Container {
	return l.itemsContainer
}

func (l *queueLayout) GetQueueStatistics() QueueStatisticsAllContract {
	return l.queueAllStatistics
}

func (l *queueLayout) AddQueue(queueID int, queue *convertor.Queue) {

	statusMessage := canvas.NewText(l.getStatusTitle(queue.Status), theme.Color(theme.ColorNamePrimary))
	messageError := canvas.NewText("", theme.Color(theme.ColorNameError))
	buttonPlay := widget.NewButtonWithIcon("", theme.Icon(theme.IconNameMediaPlay), func() {

	})
	buttonPlay.Hide()
	blockMessageError := container.NewHScroll(messageError)
	blockMessageError.Hide()

	content := container.NewVBox(
		container.NewHScroll(widget.NewLabel(queue.Setting.FileInput.Name)),
		container.NewHBox(
			buttonPlay,
			statusMessage,
		),
		blockMessageError,
		container.NewPadded(),
		canvas.NewLine(theme.Color(theme.ColorNameFocus)),
		container.NewPadded(),
	)

	l.addQueueStatistics()
	if l.GetQueueStatistics().IsChecked(queue.Status) == false {
		content.Hide()
	}

	l.items[queueID] = queueLayoutItem{
		CanvasObject:      content,
		StatusMessage:     statusMessage,
		BlockMessageError: blockMessageError,
		MessageError:      messageError,
		buttonPlay:        buttonPlay,
		status:            queue.Status,
	}
	l.itemsContainer.Add(content)
}

func (l *queueLayout) ChangeQueue(queueID int, queue *convertor.Queue) {
	if item, ok := l.items[queueID]; ok {
		statusColor := l.getStatusColor(queue.Status)
		fyne.Do(func() {
			item.StatusMessage.Text = l.getStatusTitle(queue.Status)
			item.StatusMessage.Color = statusColor
			item.StatusMessage.Refresh()
		})
		if queue.Error != nil {
			fyne.Do(func() {
				item.MessageError.Text = queue.Error.Error()
				item.MessageError.Color = statusColor
				item.BlockMessageError.Show()
				item.MessageError.Refresh()
			})
		}
		if queue.Status == convertor.StatusType(convertor.Completed) {
			item.buttonPlay.Show()
			item.buttonPlay.OnTapped = func() {
				item.buttonPlay.Disable()
				go func() {
					ffplay, err := l.ffmpegService.GetFFplay()
					if err == nil {
						_ = ffplay.Play(&queue.Setting.FileOut)
					}
					fyne.Do(func() {
						item.buttonPlay.Enable()
					})
				}()
			}
		}
		if l.GetQueueStatistics().IsChecked(queue.Status) == false && item.CanvasObject.Visible() == true {
			item.CanvasObject.Hide()
		} else if item.CanvasObject.Visible() == false {
			item.CanvasObject.Show()
		}

		l.changeQueueStatistics(queue.Status)
	}
}

func (l *queueLayout) RemoveQueue(queueID int, status convertor.StatusContract) {
	if item, ok := l.items[queueID]; ok {
		l.itemsContainer.Remove(item.CanvasObject)
		l.removeQueueStatistics(status)
		l.items[queueID] = queueLayoutItem{}
	}
}

func (l *queueLayout) addQueueStatistics() {
	l.GetQueueStatistics().GetWaiting().Add()
	l.GetQueueStatistics().GetTotal().Add()
}

func (l *queueLayout) changeQueueStatistics(status convertor.StatusContract) {
	if status == convertor.StatusType(convertor.InProgress) {
		l.GetQueueStatistics().GetWaiting().Remove()
		l.GetQueueStatistics().GetInProgress().Add()
		return
	}

	if status == convertor.StatusType(convertor.Completed) {
		l.GetQueueStatistics().GetInProgress().Remove()
		l.GetQueueStatistics().GetCompleted().Add()
		return
	}

	if status == convertor.StatusType(convertor.Error) {
		l.GetQueueStatistics().GetInProgress().Remove()
		l.GetQueueStatistics().GetError().Add()
		return
	}
}

func (l *queueLayout) removeQueueStatistics(status convertor.StatusContract) {
	l.GetQueueStatistics().GetTotal().Remove()

	if status == convertor.StatusType(convertor.Completed) {
		l.GetQueueStatistics().GetCompleted().Remove()
		return
	}

	if status == convertor.StatusType(convertor.Error) {
		l.GetQueueStatistics().GetError().Remove()
		return
	}

	if status == convertor.StatusType(convertor.InProgress) {
		l.GetQueueStatistics().GetInProgress().Remove()
		return
	}

	if status == convertor.StatusType(convertor.Waiting) {
		l.GetQueueStatistics().GetWaiting().Remove()
		return
	}
}

func (l *queueLayout) getStatusTitle(status convertor.StatusContract) string {
	return lang.L(status.Name() + "Queue")
}

func (l *queueLayout) getStatusColor(status convertor.StatusContract) color.Color {
	if status == convertor.StatusType(convertor.Error) {
		return theme.Color(theme.ColorNameError)
	}

	if status == convertor.StatusType(convertor.Completed) {
		return color.RGBA{R: 49, G: 127, B: 114, A: 255}
	}

	return theme.Color(theme.ColorNamePrimary)
}

type QueueStatisticsAllContract interface {
	GetWaiting() QueueStatisticsContract
	GetInProgress() QueueStatisticsContract
	GetCompleted() QueueStatisticsContract
	GetError() QueueStatisticsContract
	GetTotal() QueueStatisticsContract

	IsChecked(status convertor.StatusContract) bool
}

type queueAllStatistics struct {
	waiting    QueueStatisticsContract
	inProgress QueueStatisticsContract
	completed  QueueStatisticsContract
	error      QueueStatisticsContract
	total      QueueStatisticsContract
}

func newQueueAllStatistics(queueItems *map[int]queueLayoutItem) QueueStatisticsAllContract {
	checkboxWaiting := newQueueStatistics()
	checkboxInProgress := newQueueStatistics()
	checkboxCompleted := newQueueStatistics()
	checkboxError := newQueueStatistics()
	CheckboxTotal := newQueueStatistics()

	queueAllStatistics := &queueAllStatistics{
		waiting:    checkboxWaiting,
		inProgress: checkboxInProgress,
		completed:  checkboxCompleted,
		error:      checkboxError,
		total:      CheckboxTotal,
	}

	CheckboxTotal.GetCheckbox().OnChanged = func(b bool) {
		if b == true {
			queueAllStatistics.allCheckboxChecked()
		} else {
			queueAllStatistics.allUnCheckboxChecked()
		}
		queueAllStatistics.redrawingQueueItems(queueItems)
	}

	checkboxWaiting.GetCheckbox().OnChanged = func(b bool) {
		if b == true {
			queueAllStatistics.checkboxChecked()
		} else {
			queueAllStatistics.unCheckboxChecked()
		}
		queueAllStatistics.redrawingQueueItems(queueItems)
	}

	checkboxInProgress.GetCheckbox().OnChanged = func(b bool) {
		if b == true {
			queueAllStatistics.checkboxChecked()
		} else {
			queueAllStatistics.unCheckboxChecked()
		}
		queueAllStatistics.redrawingQueueItems(queueItems)
	}

	checkboxCompleted.GetCheckbox().OnChanged = func(b bool) {
		if b == true {
			queueAllStatistics.checkboxChecked()
		} else {
			queueAllStatistics.unCheckboxChecked()
		}
		queueAllStatistics.redrawingQueueItems(queueItems)
	}

	checkboxError.GetCheckbox().OnChanged = func(b bool) {
		if b == true {
			queueAllStatistics.checkboxChecked()
		} else {
			queueAllStatistics.unCheckboxChecked()
		}
		queueAllStatistics.redrawingQueueItems(queueItems)
	}

	return queueAllStatistics
}

func (s *queueAllStatistics) GetWaiting() QueueStatisticsContract {
	return s.waiting
}

func (s *queueAllStatistics) GetInProgress() QueueStatisticsContract {
	return s.inProgress
}

func (s *queueAllStatistics) GetCompleted() QueueStatisticsContract {
	return s.completed
}

func (s *queueAllStatistics) GetError() QueueStatisticsContract {
	return s.error
}

func (s *queueAllStatistics) GetTotal() QueueStatisticsContract {
	return s.total
}

func (s *queueAllStatistics) IsChecked(status convertor.StatusContract) bool {
	if status == convertor.StatusType(convertor.InProgress) {
		return s.inProgress.GetCheckbox().Checked
	}
	if status == convertor.StatusType(convertor.Completed) {
		return s.completed.GetCheckbox().Checked
	}
	if status == convertor.StatusType(convertor.Error) {
		return s.error.GetCheckbox().Checked
	}
	if status == convertor.StatusType(convertor.Waiting) {
		return s.waiting.GetCheckbox().Checked
	}

	return true
}

func (s *queueAllStatistics) redrawingQueueItems(queueItems *map[int]queueLayoutItem) {
	for _, item := range *queueItems {
		if s.isChecked(item.status) == true && item.CanvasObject.Visible() == false {
			item.CanvasObject.Show()
			continue
		}
		if s.isChecked(item.status) == false && item.CanvasObject.Visible() == true {
			item.CanvasObject.Hide()
		}
	}
}

func (s *queueAllStatistics) isChecked(status convertor.StatusContract) bool {
	if status == convertor.StatusType(convertor.InProgress) {
		return s.inProgress.GetCheckbox().Checked
	}
	if status == convertor.StatusType(convertor.Completed) {
		return s.completed.GetCheckbox().Checked
	}
	if status == convertor.StatusType(convertor.Error) {
		return s.error.GetCheckbox().Checked
	}
	if status == convertor.StatusType(convertor.Waiting) {
		return s.waiting.GetCheckbox().Checked
	}

	return true
}

func (s *queueAllStatistics) checkboxChecked() {
	if s.total.GetCheckbox().Checked == true {
		return
	}

	if s.waiting.GetCheckbox().Checked == false {
		return
	}

	if s.inProgress.GetCheckbox().Checked == false {
		return
	}

	if s.completed.GetCheckbox().Checked == false {
		return
	}

	if s.error.GetCheckbox().Checked == false {
		return
	}

	s.total.GetCheckbox().Checked = true
	s.total.GetCheckbox().Refresh()
}

func (s *queueAllStatistics) unCheckboxChecked() {
	if s.total.GetCheckbox().Checked == false {
		return
	}

	s.total.GetCheckbox().Checked = false
	s.total.GetCheckbox().Refresh()
}

func (s *queueAllStatistics) allCheckboxChecked() {
	s.waiting.GetCheckbox().Checked = true
	s.waiting.GetCheckbox().Refresh()

	s.inProgress.GetCheckbox().Checked = true
	s.inProgress.GetCheckbox().Refresh()

	s.completed.GetCheckbox().Checked = true
	s.completed.GetCheckbox().Refresh()

	s.error.GetCheckbox().Checked = true
	s.error.GetCheckbox().Refresh()
}

func (s *queueAllStatistics) allUnCheckboxChecked() {
	s.waiting.GetCheckbox().Checked = false
	s.waiting.GetCheckbox().Refresh()

	s.inProgress.GetCheckbox().Checked = false
	s.inProgress.GetCheckbox().Refresh()

	s.completed.GetCheckbox().Checked = false
	s.completed.GetCheckbox().Refresh()

	s.error.GetCheckbox().Checked = false
	s.error.GetCheckbox().Refresh()
}

type QueueStatisticsContract interface {
	SetTitle(title string)
	GetCheckbox() *widget.Check
	Add()
	Remove()
}

type queueStatistics struct {
	checkbox *widget.Check
	title    string
	count    int64
}

func newQueueStatistics() QueueStatisticsContract {
	checkbox := widget.NewCheck(": 0", nil)
	checkbox.Checked = true

	return &queueStatistics{
		checkbox: checkbox,
		title:    "",
		count:    0,
	}
}

func (s *queueStatistics) SetTitle(title string) {
	s.title = strings.ToLower(title)
	s.checkbox.Text = title + ": " + strconv.FormatInt(s.count, 10)
}

func (s *queueStatistics) GetCheckbox() *widget.Check {
	return s.checkbox
}

func (s *queueStatistics) Add() {
	s.count += 1
	s.formatText()
}

func (s *queueStatistics) Remove() {
	if s.count == 0 {
		return
	}
	s.count -= 1
	s.formatText()
}

func (s *queueStatistics) formatText() {
	fyne.Do(func() {
		s.checkbox.Text = s.title + ": " + strconv.FormatInt(s.count, 10)
		s.checkbox.Refresh()
	})
}

type queueLayoutItem struct {
	CanvasObject      fyne.CanvasObject
	BlockMessageError *container.Scroll
	StatusMessage     *canvas.Text
	MessageError      *canvas.Text
	buttonPlay        *widget.Button
	status            convertor.StatusContract
}