package main

import (
	ui "github.com/VladimirMarkelov/clui"
	term "github.com/nsf/termbox-go"
)

type ErrMsgDialog struct {
	View *ui.Window

	result      int
	beforeClose func()
	onClose     func()
}

func CreateErrMsgDialog(title string, err error) *ErrMsgDialog {
	dlg := new(ErrMsgDialog)

	sWidth, sHeight := ui.ScreenSize()
	wWidth, wHeight := 60, 10
	dlg.View = ui.AddWindow(sWidth/2-wWidth/2, sHeight/2-wHeight/2, wWidth, wHeight, title)
	ui.WindowManager().BeginUpdate()
	defer ui.WindowManager().EndUpdate()

	dlg.View.SetModal(true)
	dlg.View.SetSizable(false)
	dlg.View.SetTitleButtons(ui.ButtonDefault)
	dlg.View.SetPack(ui.Vertical)

	textfrm := ui.CreateFrame(dlg.View, 1, 1, ui.BorderNone, ui.Fixed)
	textfrm.SetPaddings(1, 1)
	textfrm.SetPack(ui.Vertical)
	textfrm.SetGaps(2, 1)

	lbl := ui.CreateLabel(textfrm, ui.AutoSize, ui.AutoSize, "An error occurs:", ui.Fixed)
	lbl.SetTextColor(ui.ColorRedBold)

	tv := ui.CreateTextView(textfrm, ui.AutoSize, 4, ui.Fixed)
	tv.SetWordWrap(true)
	tv.SetText([]string{err.Error()})
	tv.SetTextColor(ui.ColorWhite)
	tv.SetBackColor(ui.ColorBlack)

	ui.CreateLabel(textfrm, ui.AutoSize, ui.AutoSize, "Please try again.", ui.Fixed)

	btnOk := ui.CreateButton(textfrm, 20, 4, "Ok", 1)

	btnOk.OnClick(func(ev ui.Event) {
		if dlg.beforeClose != nil {
			dlg.beforeClose()
		}

		ui.WindowManager().DestroyWindow(dlg.View)
		ui.WindowManager().BeginUpdate()

		closeFunc := dlg.onClose
		ui.WindowManager().EndUpdate()
		if closeFunc != nil {
			closeFunc()
		}
	})

	dlg.View.OnKeyDown(func(ev ui.Event, data interface{}) bool {
		if ev.Key == term.KeyEnter {
			if dlg.beforeClose != nil {
				dlg.beforeClose()
			}

			ui.WindowManager().DestroyWindow(dlg.View)
			ui.WindowManager().BeginUpdate()

			closeFunc := dlg.onClose
			ui.WindowManager().EndUpdate()
			if closeFunc != nil {
				closeFunc()
			}
			return true
		}
		return false
	}, nil)

	ui.ActivateControl(dlg.View, btnOk)

	return dlg
}