package main

import (
	"fyne.io/fyne/v2"
	"fyne.io/fyne/v2/canvas"
	"fyne.io/fyne/v2/container"
	"fyne.io/fyne/v2/layout"
	"fyne.io/fyne/v2/widget"
)

// Dialog settings for an individual Error Message popup.
type Dialog struct {
	Icon    Icon
	Title   string
	Message string
	Buttons []*Button
}

// Button settings.
type Button struct {
	Label    string
	Disabled bool
}

func (d Dialog) Show() {
	// Validate and set defaults.
	if d.Title == "" {
		d.Title = DefaultTitle
	}
	if d.Message == "" {
		d.Message = DefaultMessage
	}
	if d.Icon.Empty() {
		d.Icon = icons[DefaultIcon]
	}

	// If no buttons have text, set a default button.
	var hasButtons bool
	for _, btn := range d.Buttons {
		if btn.Label != "" {
			hasButtons = true
			break
		}
	}
	if !hasButtons {
		d.Buttons = []*Button{
			{
				Label: "Ok",
			},
		}
	}

	// Create the dialog window.
	w := fyne.CurrentApp().NewWindow(d.Title)

	// Icon + Message row.
	icon := canvas.NewImageFromResource(d.Icon)
	icon.FillMode = canvas.ImageFillOriginal
	icon.Resize(fyne.NewSize(32, 32))
	message := widget.NewLabel(d.Message)
	messageRow := container.New(layout.NewHBoxLayout(), layout.NewSpacer(), icon, message, layout.NewSpacer())

	// After clicked handler for buttons.
	onClick := func() {
		MainWindow.Show()
		w.Close()
	}
	w.SetOnClosed(onClick)

	// Buttons
	var buttons = []fyne.CanvasObject{
		layout.NewSpacer(),
	}
	for _, b := range d.Buttons {
		if b.Label == "" {
			continue
		}

		button := widget.NewButton(b.Label, func() {
			onClick()
		})
		if b.Disabled {
			button.Disable()
		}
		buttons = append(buttons, button, layout.NewSpacer())
	}
	buttonRow := container.New(layout.NewHBoxLayout(), buttons...)

	vbox := container.New(layout.NewVBoxLayout(), messageRow, buttonRow)
	w.SetContent(container.New(layout.NewPaddedLayout(), vbox))

	w.Show()
}