package main

import (
	"log"
	"math"
	"os/user"

	"github.com/lxn/walk"
	. "github.com/lxn/walk/declarative"
)

type MyMainWindow struct {
	*walk.MainWindow
	colors         *walk.ScrollView
	canvasScroll   *walk.ScrollView
	drawWidget     *walk.CustomWidget
	propScroll     *walk.ScrollView
	pallette       Pallette
	beads          []*BeadColor
	brand_combo    *walk.ComboBox
	brand_model    []string
	serie_combo    *walk.ComboBox
	serie_model    []string
	pegboard_combo *walk.ComboBox
	pegboard_model []string
	properties     *properties
}

const (
	AppName   string = "BeadImager"
	Version   string = "0.0.22"
	CopyRight string = "©2022 Jan Lerking"
	STD_MESS  string = "Ready"
	LogFile   string = "BeadImager.log"
	Sep       string = "\\"
)

var (
	UserPath string
)

func main() {
	// Get current user
	currentUser, err := user.Current()
	if err != nil {
		log.Fatalf(err.Error())
	}
	homeDir := currentUser.HomeDir
	UserPath = homeDir + Sep + "BeadImager"
	InitLogFile()

	walk.AppendToWalkInit(func() {
		walk.FocusEffect, _ = walk.NewBorderGlowEffect(walk.RGB(0, 63, 255))
		//walk.InteractionEffect, _ = walk.NewDropShadowEffect(walk.RGB(63, 63, 63))
		walk.ValidationErrorEffect, _ = walk.NewBorderGlowEffect(walk.RGB(255, 0, 0))
	})
	mw := &MyMainWindow{}
	log.Println("MainWindow created")
	CreatePallette(mw)
	log.Println("Pallette created: ", mw.pallette)
	mw.brand_model = CreateBrandsList(mw)
	brand_trigged := false
	serie_trigged := false
	pegboard_trigged := false
	settings_trigged := false

	DD_Pallette := GroupBox{
		Title:  "Pallette",
		Layout: VBox{},
		Children: []Widget{
			Composite{
				Layout: HBox{MarginsZero: true},
				Children: []Widget{
					Label{
						Text: "Brand:",
					},
					ComboBox{
						Alignment: AlignHFarVCenter,
						AssignTo:  &mw.brand_combo,
						Model:     mw.brand_model,
						OnCurrentIndexChanged: func() {
							if !brand_trigged {
								log.Println("Brand changed to: ", mw.brand_combo.Text())
								mw.serie_model = CreateSeriesList(mw)
								mw.serie_combo.SetModel(mw.serie_model)
								mw.serie_combo.SetEnabled(true)
							}
							brand_trigged = true
						},
					},
				},
			},
			Composite{
				Layout: HBox{MarginsZero: true},
				Children: []Widget{
					Label{
						Text: "Serie:",
					},
					ComboBox{
						Alignment: AlignHFarVCenter,
						AssignTo:  &mw.serie_combo,
						Enabled:   false,
						OnCurrentIndexChanged: func() {
							if !serie_trigged {
								log.Println("Serie changed to: ", mw.serie_combo.Text())
								LoadBeads(mw)
								log.Println("Beads loaded: ", mw.beads)
								mw.pegboard_model = CreatePegboardsList(mw)
								mw.pegboard_combo.SetModel(mw.pegboard_model)
								mw.pegboard_combo.SetEnabled(true)
							}
							serie_trigged = true
						},
					},
				},
			},
			Composite{
				Layout: HBox{MarginsZero: true},
				Children: []Widget{
					Label{
						Text: "Pegboard:",
					},
					ComboBox{
						Alignment: AlignHFarVCenter,
						AssignTo:  &mw.pegboard_combo,
						Enabled:   false,
						OnCurrentIndexChanged: func() {
							if !pegboard_trigged {
								log.Println("Pegboard changed to: ", mw.pegboard_combo.Text())
							}
							pegboard_trigged = true
						},
					},
				},
			},
		},
	}

	DD_Beads := GroupBox{
		Title:  "Beads",
		Layout: VBox{},
		Children: []Widget{
			PushButton{
				Text: "Select all colors",
				OnClicked: func() {
					for _, c := range mw.beads {
						c.Checkbox.SetChecked(true)
					}
				},
			},
			ScrollView{
				AssignTo: &mw.colors,
				Layout:   VBox{MarginsZero: true},
			},
		},
	}

	if _, err := (MainWindow{
		AssignTo: &mw.MainWindow,
		Title:    AppName + " " + Version,
		MinSize:  Size{800, 600},
		OnSizeChanged: func() {
			if !settings_trigged {
				ShowProperties(mw)
				settings_trigged = true
			}
		},
		Layout: VBox{MarginsZero: true},
		Children: []Widget{
			Composite{
				Layout: HBox{},
				Children: []Widget{
					Composite{
						Layout:  VBox{MarginsZero: true},
						MaxSize: Size{220, 0},
						Children: []Widget{
							DD_Pallette,
							DD_Beads,
						},
					},
					GroupBox{
						Title:  "Canvas",
						Layout: VBox{},
						Children: []Widget{
							ScrollView{
								AssignTo: &mw.canvasScroll,
								Layout:   VBox{MarginsZero: true},
								Children: []Widget{
									CustomWidget{
										AssignTo:            &mw.drawWidget,
										ClearsBackground:    true,
										InvalidatesOnResize: true,
										Paint:               mw.drawStuff,
									},
								},
							},
						},
					},
					GroupBox{
						Title:   "Settings",
						Layout:  VBox{},
						MaxSize: Size{220, 0},
						Children: []Widget{
							ScrollView{
								AssignTo: &mw.propScroll,
								Layout:   VBox{MarginsZero: true},
							},
						},
					},
				},
			},
		},
	}.Run()); err != nil {
		log.Fatal(err)
	}
}

func (mv *MyMainWindow) clearBackground(canvas *walk.Canvas, updateBounds walk.Rectangle) error {
	brush, err := walk.NewSolidColorBrush(walk.RGB(0, 0, 0))
	if err != nil {
		return err
	}
	defer brush.Dispose()

	return canvas.FillRectangle(brush, updateBounds)
}

func (mw *MyMainWindow) drawStuff(canvas *walk.Canvas, updateBounds walk.Rectangle) error {
	bmp, err := createBitmap()
	if err != nil {
		return err
	}
	defer bmp.Dispose()

	bounds := mw.drawWidget.ClientBounds()

	rectPen, err := walk.NewCosmeticPen(walk.PenSolid, walk.RGB(255, 0, 0))
	if err != nil {
		return err
	}
	defer rectPen.Dispose()

	if err := canvas.DrawRectangle(rectPen, bounds); err != nil {
		return err
	}

	ellipseBrush, err := walk.NewHatchBrush(walk.RGB(0, 255, 0), walk.HatchCross)
	if err != nil {
		return err
	}
	defer ellipseBrush.Dispose()

	if err := canvas.FillEllipse(ellipseBrush, bounds); err != nil {
		return err
	}

	linesBrush, err := walk.NewSolidColorBrush(walk.RGB(0, 0, 255))
	if err != nil {
		return err
	}
	defer linesBrush.Dispose()

	linesPen, err := walk.NewGeometricPen(walk.PenDash, 8, linesBrush)
	if err != nil {
		return err
	}
	defer linesPen.Dispose()

	if err := canvas.DrawLine(linesPen, walk.Point{bounds.X, bounds.Y}, walk.Point{bounds.Width, bounds.Height}); err != nil {
		return err
	}
	if err := canvas.DrawLine(linesPen, walk.Point{bounds.X, bounds.Height}, walk.Point{bounds.Width, bounds.Y}); err != nil {
		return err
	}

	points := make([]walk.Point, 10)
	dx := bounds.Width / (len(points) - 1)
	for i := range points {
		points[i].X = i * dx
		points[i].Y = int(float64(bounds.Height) / math.Pow(float64(bounds.Width/2), 2) * math.Pow(float64(i*dx-bounds.Width/2), 2))
	}
	if err := canvas.DrawPolyline(linesPen, points); err != nil {
		return err
	}

	bmpSize := bmp.Size()
	if err := canvas.DrawImage(bmp, walk.Point{(bounds.Width - bmpSize.Width) / 2, (bounds.Height - bmpSize.Height) / 2}); err != nil {
		return err
	}

	return nil
}

func createBitmap() (*walk.Bitmap, error) {
	bounds := walk.Rectangle{Width: 200, Height: 200}

	bmp, err := walk.NewBitmap(bounds.Size())
	if err != nil {
		return nil, err
	}

	succeeded := false
	defer func() {
		if !succeeded {
			bmp.Dispose()
		}
	}()

	canvas, err := walk.NewCanvasFromImage(bmp)
	if err != nil {
		return nil, err
	}
	defer canvas.Dispose()

	brushBmp, err := walk.NewBitmapFromFile("images/plus.png")
	if err != nil {
		return nil, err
	}
	defer brushBmp.Dispose()

	brush, err := walk.NewBitmapBrush(brushBmp)
	if err != nil {
		return nil, err
	}
	defer brush.Dispose()

	if err := canvas.FillRectangle(brush, bounds); err != nil {
		return nil, err
	}

	font, err := walk.NewFont("Times New Roman", 40, walk.FontBold|walk.FontItalic)
	if err != nil {
		return nil, err
	}
	defer font.Dispose()

	if err := canvas.DrawText("Walk Drawing Example", font, walk.RGB(0, 0, 0), bounds, walk.TextWordbreak); err != nil {
		return nil, err
	}

	succeeded = true

	return bmp, nil
}