package funkin.backend.system.updating;

import flixel.addons.transition.FlxTransitionableState;
import flixel.math.FlxPoint;
import funkin.backend.FunkinText;
import funkin.backend.system.updating.UpdateUtil.UpdateCheckCallback;
import funkin.backend.utils.MarkdownUtil;
import funkin.menus.MainMenuState;

class UpdateAvailableScreen extends MusicBeatState {
	public var bg:FlxSprite;

	public var versionCheckBG:FlxSprite;
	public var title:Alphabet;
	public var versionDifferenceLabel:FunkinText;
	public var changeLogText:FunkinText;
	public var check:UpdateCheckCallback;

	public var optionsBG:FlxSprite;
	public var installButton:FunkinText;
	public var skipButton:FunkinText;

	public var installSelected:Bool = true;

	public function new(check:UpdateCheckCallback) {
		super();
		this.check = check;
	}

	public override function create() {
		super.create();
		MusicBeatState.skipTransIn = true;
		FlxG.mouse.visible = true;

		FlxG.camera.flash(0xFF000000, 0.25);

		bg = new FlxSprite().loadAnimatedGraphic(Paths.image("menus/menuDesat"));
		bg.color = 0xFF181818;
		bg.antialiasing = true;
		bg.scrollFactor.set();
		bg.screenCenter();
		add(bg);

		// which file should i put this in?
		// Misc.xml?
		title = new Alphabet(0, 10, TU.translate("updateAvailable.title"), true);
		title.screenCenter(X);
		title.scrollFactor.set();

		versionDifferenceLabel = new FunkinText(0, title.y + title.height + 10, FlxG.width, '${check.currentVersionTag} < ${check.newVersionTag}', 28, false);
		versionDifferenceLabel.color = 0xFFFFFFFF;
		versionDifferenceLabel.alignment = CENTER;
		versionDifferenceLabel.scrollFactor.set();

		versionCheckBG = new FlxSprite(-1, -1).makeGraphic(1, 1, 0xFFFFFFFF);
		versionCheckBG.alpha = 0.75;
		versionCheckBG.color = 0xFF000000;
		versionCheckBG.scale.set(FlxG.width + 2, versionDifferenceLabel.y + versionDifferenceLabel.height + 14);
		versionCheckBG.updateHitbox();
		versionCheckBG.scrollFactor.set();

		changeLogText = new FunkinText(0, versionCheckBG.y + versionCheckBG.height + 10, FlxG.width, "", 20, true);
		changeLogText.borderColor = 0xFF000000;
		MarkdownUtil.applyMarkdownText(changeLogText, check.updates.last().body);

		installButton = new FunkinText(0, FlxG.height - 25, Std.int(FlxG.width / 2), "PLACEHOLDER", 32);
		skipButton = new FunkinText(Std.int(FlxG.width / 2), FlxG.height - 25, Std.int(FlxG.width / 2), "PLACEHOLDER", 32);

		skipButton.y -= skipButton.height;
		installButton.y -= installButton.height;

		installButton.alignment = skipButton.alignment = CENTER;

		optionsBG = new FlxSprite(-1, installButton.y - 25).makeGraphic(1, 1, 0xFFFFFFFF);
		optionsBG.alpha = 0.75;
		optionsBG.color = 0xFF000000;
		optionsBG.scale.set(FlxG.width + 2, Std.int(FlxG.height - optionsBG.y));
		optionsBG.updateHitbox();

		installButton.scrollFactor.set();
		skipButton.scrollFactor.set();
		optionsBG.scrollFactor.set();

		add(changeLogText);

		add(versionCheckBG);
		add(title);
		add(versionDifferenceLabel);

		add(optionsBG);
		add(installButton);
		add(skipButton);

		oldPos = FlxG.mouse.getScreenPosition();

		changeSelection(false);

		DiscordUtil.call("onMenuLoaded", ["Update Available Screen"]);
	}

	var destY:Float = 0;
	var oldPos:FlxPoint;

	public override function update(elapsed:Float) {
		super.update(elapsed);

		destY = CoolUtil.bound(destY - (FlxG.mouse.wheel * 75), 0, Math.max(0, changeLogText.height - FlxG.height + versionCheckBG.height + 20 + optionsBG.height));
		FlxG.camera.scroll.y = lerp(FlxG.camera.scroll.y, destY, 1/3);

		if (controls.LEFT_P || controls.RIGHT_P) {
			installSelected = !installSelected;
			changeSelection();
		}

		var newPos = FlxG.mouse.getScreenPosition();
		if (oldPos.x != newPos.x || oldPos.y != newPos.y) {
			if (newPos.y >= optionsBG.y) {
				if (installSelected != (installSelected = (newPos.x < (FlxG.width / 2)))) {
					changeSelection();
				}
			}
			oldPos = newPos;
		}

		if (controls.ACCEPT || (newPos.y >= optionsBG.y && FlxG.mouse.justPressed))
			select();
	}

	public function select() {
		if (installSelected) {
			CoolUtil.playMenuSFX(CONFIRM);
			FlxG.switchState(new UpdateScreen(check));
		} else {
			CoolUtil.playMenuSFX(CANCEL);
			FlxG.switchState(new MainMenuState());
		}
	}

	var installText = TU.translate("updateAvailable.install");
	var skipText = TU.translate("updateAvailable.skip");

	public function changeSelection(playSFX:Bool = true) {
		CoolUtil.playMenuSFX(SCROLL, 0.7);

		// keeping this local just incase we wanna change this later
		inline function wrap(str:String, shouldWrap:Bool)
			return shouldWrap ? "> " + str + " <" : str;

		installButton.text = wrap(installText, installSelected);
		skipButton.text = wrap(skipText, !installSelected);
	}

	public override function destroy() {
		super.destroy();
		FlxG.mouse.visible = false;
		oldPos.put();
	}
}