package tins2020

import (
	"image/color"

	"opslag.de/schobers/geom"
	"opslag.de/schobers/zntg"
	"opslag.de/schobers/zntg/ui"
)

const titleBarHeight = 64

type LargeDialog struct {
	ui.StackPanel

	titleBar *LargeDialogTitleBar
	content  ui.Proxy

	closeRequested ui.Events
}

func NewLargeDialog(title string, content ui.Control) *LargeDialog {
	dialog := &LargeDialog{}

	dialog.Orientation = ui.OrientationVertical
	dialog.titleBar = NewLargeDialogTitleBar(title, func(ctx ui.Context, state interface{}) {
		dialog.closeRequested.Notify(ctx, state)
	})
	dialog.content.Content = ui.Margins(content, titleBarHeight, 20, titleBarHeight, 0)
	dialog.Children = []ui.Control{dialog.titleBar, &dialog.content}

	return dialog
}

func (d *LargeDialog) CloseRequested() ui.EventHandler { return &d.closeRequested }

func (d *LargeDialog) Handle(ctx ui.Context, e ui.Event) bool {
	if d.StackPanel.Handle(ctx, e) {
		return true
	}

	switch e := e.(type) {
	case *ui.KeyDownEvent:
		switch e.Key {
		case ui.KeyEscape:
			d.closeRequested.Notify(ctx, nil)
			return true
		case ui.KeyEnter:
			d.closeRequested.Notify(ctx, nil)
			return true
		}
	}
	return false
}

func (d *LargeDialog) Hidden() { d.content.Hidden() }

func (d *LargeDialog) Render(ctx ui.Context) {
	ctx.Renderer().Clear(zntg.MustHexColor("#356DAD"))
	d.StackPanel.Render(ctx)
}

func (d *LargeDialog) Shown() { d.content.Shown() }

type LargeDialogTitleBar struct {
	ui.ContainerBase

	title ui.Label
	close ui.Button
}

func NewLargeDialogTitleBar(title string, closeRequested ui.EventFn) *LargeDialogTitleBar {
	titleBar := &LargeDialogTitleBar{}
	titleBar.Children = []ui.Control{&titleBar.title, &titleBar.close}
	titleBar.close.ButtonClicked().AddHandler(func(ctx ui.Context, args ui.ControlClickedArgs) {
		closeRequested(ctx, args)
	})
	titleBar.title.Font.Color = color.White
	titleBar.title.Font.Name = "title"
	titleBar.title.Text = title
	titleBar.title.TextAlignment = ui.AlignCenter

	titleBar.close.Icon = "control-cancel"
	titleBar.close.IconHeight = 32
	titleBar.close.Type = ui.ButtonTypeIcon
	titleBar.close.HoverColor = zntg.MustHexColor(`#ABCAED`)

	return titleBar
}

func (b *LargeDialogTitleBar) Arrange(ctx ui.Context, bounds geom.RectangleF32, offset geom.PointF32, parent ui.Control) {
	b.ControlBase.Arrange(ctx, bounds, offset, parent)
	b.title.Arrange(ctx, bounds, offset, parent)
	height := bounds.Dy()
	b.close.Arrange(ctx, geom.RectRelF32(bounds.Max.X-height, bounds.Min.Y, height, height), offset, parent)
}

func (b *LargeDialogTitleBar) DesiredSize(ctx ui.Context, size geom.PointF32) geom.PointF32 {
	return geom.PtF32(size.X, titleBarHeight)
}