package tins2020

import "github.com/veandco/go-sdl2/sdl"

type DialogBase struct {
	Container

	content Proxy
	onShow  *Events
	close   EventFn
}

type Dialog interface {
	CloseDialog()
	OnShow() EventHandler
	ShowDialog(*Context, EventFn)
}

func (d *DialogBase) CloseDialog() {
	close := d.close
	if close != nil {
		close()
	}
}

func (d *DialogBase) Init(ctx *Context) error {
	d.AddChild(&d.content)
	return d.Container.Init(ctx)
}

func (d *DialogBase) OnShow() EventHandler {
	if d.onShow == nil {
		d.onShow = NewEvents()
	}
	return d.onShow
}

func (d *DialogBase) SetContent(control Control) {
	d.content.Proxied = control
}

func (d *DialogBase) ShowDialog(ctx *Context, close EventFn) {
	d.close = close
	if d.onShow != nil {
		d.onShow.Notify(ctx)
	}
}

type LargeDialog struct {
	DialogBase

	title Label
	close IconButton
}

func (d *LargeDialog) Arrange(ctx *Context, bounds Rectangle) {
	const titleHeight = 64
	d.ControlBase.Arrange(ctx, bounds)
	d.title.Arrange(ctx, Rect(bounds.X, bounds.Y, bounds.W, titleHeight))
	d.close.Arrange(ctx, Rect(bounds.W-64, 0, 64, 64))
	d.content.Arrange(ctx, Rect(bounds.X+titleHeight, 96, bounds.W-2*titleHeight, bounds.H-titleHeight))
}

func (d *LargeDialog) Init(ctx *Context) error {
	d.title = Label{
		Text:      "Botanim",
		FontName:  "title",
		Alignment: TextAlignmentCenter,
	}
	d.close = IconButton{
		Icon:      "control-cancel",
		IconHover: HoverEffectColor,
		IconWidth: 32,
	}
	d.close.OnLeftMouseButtonClick = EmptyEvent(d.CloseDialog)
	d.AddChild(&d.title)
	d.AddChild(&d.close)
	return d.DialogBase.Init(ctx)
}

func (d *LargeDialog) Handle(ctx *Context, event sdl.Event) bool {
	if d.DialogBase.Handle(ctx, event) {
		return true
	}

	switch e := event.(type) {
	case *sdl.KeyboardEvent:
		if e.Type == sdl.KEYDOWN {
			switch e.Keysym.Sym {
			case sdl.K_ESCAPE:
				d.CloseDialog()
				return true
			case sdl.K_RETURN:
				d.CloseDialog()
				return true
			}
		}
	}
	return false
}

func (d *LargeDialog) Render(ctx *Context) {
	SetDrawColor(ctx.Renderer, MustHexColor("#356DAD"))
	ctx.Renderer.FillRect(d.Bounds.SDLPtr())

	d.DialogBase.Render(ctx)
}

func (d *LargeDialog) SetCaption(s string) { d.title.Text = s }