package screens

import (
	"lab.zaar.be/thefish/alchemyst-go/engine/types"
	"lab.zaar.be/thefish/alchemyst-go/ui/mainwindow"
	blt "lab.zaar.be/thefish/bearlibterminal"
	"strings"
)

const runeIndex = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"

type MenuScreen struct {
	*types.Rect

	mw           *mainwindow.MainWindow
	scm          *types.ScreenManager
	renderParent bool

	items   []interface{}
	title   string
	header  string
	footer  string
	redraw  bool
	bgColor string
	fgColor string
}

func NewMenuScreen(mw *mainwindow.MainWindow, scm *types.ScreenManager, title, header, footer string, rect *types.Rect, renderParent bool) *MenuScreen {
	return &MenuScreen{
		title:        title,
		header:       header,
		footer:       footer,
		Rect:         rect,
		mw:           mw,
		scm:          scm,
		renderParent: renderParent,
	}
}

func (ms *MenuScreen) SetBgColor(color string) *MenuScreen {
	ms.bgColor = color
	return ms
}

func (ms *MenuScreen) SetFgColor(color string) *MenuScreen {
	ms.fgColor = color
	return ms
}

//fixme!!

func (ms *MenuScreen) SetItems(items []interface{}) *MenuScreen {
	ms.items = items
	return ms
}

func (ms *MenuScreen) UseEcs() bool { return false }

func (ms *MenuScreen) Enter() {
	ms.redraw = true
}

func (ms *MenuScreen) HandleInput(input string) {
	//
	//if input != "" {
	//	ms.redraw = true
	//}

	switch input {
	case "Escape":
		fallthrough
	case "Space":
		ms.scm.SetScreen(ms.scm.PreviousScreen)
		break
	}
}

func (ms *MenuScreen) Exit() {
	menuLayer := ms.mw.GetLayer("menu")
	menuLayer.ClearRect(ms.Rect)
	bgLayer := ms.mw.GetLayer("menubg")
	bgLayer.ClearRect(ms.Rect)
}

func (ms *MenuScreen) Render() {
	if ms.renderParent {
		ms.scm.PreviousScreen.Render()
	}
	if (ms.redraw || ms.renderParent) {
		ms.redraw = false
		menuLayer := ms.mw.GetLayer("menu")
		menuLayer.ClearRect(ms.Rect)
		bgLayer := ms.mw.GetLayer("menubg")
		bgLayer.ClearRect(ms.Rect)
		bgLayer.WithColor(ms.bgColor).NewWindow(ms.Rect).Splash()
		menuLayer.WithColor(ms.fgColor).NewWindow(ms.Rect).DoubleBordered(ms.title)
		menuLayer.Print(ms.X+(ms.W/2)-7, ms.Y+ms.H-1, "╡"+"[color=green]Space[/color] to close"+"╞")
		footerHeight := 0
		if ms.footer != "" {
			_, footerHeight = menuLayer.PrintInside(ms.Rect, ms.footer, 9)
			footerHeight = footerHeight + 2
		}
		_, headerHeight := menuLayer.PrintInside(ms.Rect, ms.header, blt.TK_ALIGN_LEFT)
		itemField := types.Rect{ms.X, ms.Y + headerHeight + 1, ms.W, ms.H - headerHeight - footerHeight}
		_ = itemField
		if (len(ms.items) > 0) {
			//fixme itemfield object, scroller, inputhandler, current selected item
			menuItems := make([]string, 0)
			for i, _ := range ms.items {
				if string(ms.items[i].(string)) != "" {
					menuItems = append(menuItems, ms.items[i].(string))
				}
			}
			menuLayer.PrintInside(&itemField, strings.Join(menuItems, "\n"), blt.TK_ALIGN_LEFT)

		}
	}
}