package funkin;

import flixel.FlxSprite;
import flixel.math.FlxMath;
import funkin.play.PlayState;
import funkin.play.Strumline.StrumlineStyle;
import funkin.shaderslmfao.ColorSwap;
import funkin.ui.PreferencesMenu;
import funkin.util.Constants;

using StringTools;

class Note extends FlxSprite
{
	public var data = new NoteData();

	/**
	 * code colors for.... code.... 
	 * i think goes in order of left to right
	 * 
	 * left 	0
	 * down 	1
	 * up 		2
	 * right 	3
	 */
	public static var codeColors:Array<Int> = [0xFFFF22AA, 0xFF00EEFF, 0xFF00CC00, 0xFFCC1111];

	public var mustPress:Bool = false;
	public var followsTime:Bool = true; // used if you want the note to follow the time shit!
	public var canBeHit:Bool = false;
	public var tooLate:Bool = false;
	public var wasGoodHit:Bool = false;
	public var prevNote:Note;

	private var willMiss:Bool = false;

	public var invisNote:Bool = false;

	public var isSustainNote:Bool = false;

	public var colorSwap:ColorSwap;

	/** the lowercase name of the note, for anim control, i.e. left right up down */
	public var dirName(get, never):String;

	inline function get_dirName()
		return data.dirName;

	/** the uppercase name of the note, for anim control, i.e. left right up down */
	public var dirNameUpper(get, never):String;

	inline function get_dirNameUpper()
		return data.dirNameUpper;

	/** the lowercase name of the note's color, for anim control, i.e. purple blue green red */
	public var colorName(get, never):String;

	inline function get_colorName()
		return data.colorName;

	/** the lowercase name of the note's color, for anim control, i.e. purple blue green red */
	public var colorNameUpper(get, never):String;

	inline function get_colorNameUpper()
		return data.colorNameUpper;

	public var highStakes(get, never):Bool;

	inline function get_highStakes()
		return data.highStakes;

	public var lowStakes(get, never):Bool;

	inline function get_lowStakes()
		return data.lowStakes;

	public static var swagWidth:Float = 160 * 0.7;
	public static var PURP_NOTE:Int = 0;
	public static var GREEN_NOTE:Int = 2;
	public static var BLUE_NOTE:Int = 1;
	public static var RED_NOTE:Int = 3;

	// SCORING STUFF
	public static var HIT_WINDOW:Float = (10 / 60) * 1000; // 166.67 ms hit window (10 frames at 60fps)
	// thresholds are fractions of HIT_WINDOW ^^
	// anything above bad threshold is shit
	public static var BAD_THRESHOLD:Float = 0.8; // 	125ms	, 8 frames
	public static var GOOD_THRESHOLD:Float = 0.55; // 	91.67ms	, 5.5 frames
	public static var SICK_THRESHOLD:Float = 0.2; // 	33.33ms	, 2 frames

	public var noteSpeedMulti:Float = 1;
	public var pastHalfWay:Bool = false;

	// anything below sick threshold is sick
	public static var arrowColors:Array<Float> = [1, 1, 1, 1];

	// Which note asset to load?
	public var style:StrumlineStyle = NORMAL;

	public function new(strumTime:Float = 0, noteData:NoteType, ?prevNote:Note, ?sustainNote:Bool = false, ?style:StrumlineStyle = NORMAL)
	{
		super();

		if (prevNote == null)
			prevNote = this;

		this.prevNote = prevNote;
		isSustainNote = sustainNote;

		x += 50;
		// MAKE SURE ITS DEFINITELY OFF SCREEN?
		y -= 2000;
		data.strumTime = strumTime;

		data.noteData = noteData;

		this.style = style;

		if (this.style == null)
			this.style = StrumlineStyle.NORMAL;

		// TODO: Make this logic more generic
		switch (this.style)
		{
			case PIXEL:
				loadGraphic(Paths.image('weeb/pixelUI/arrows-pixels'), true, 17, 17);

				animation.add('greenScroll', [6]);
				animation.add('redScroll', [7]);
				animation.add('blueScroll', [5]);
				animation.add('purpleScroll', [4]);

				if (isSustainNote)
				{
					loadGraphic(Paths.image('weeb/pixelUI/arrowEnds'), true, 7, 6);

					animation.add('purpleholdend', [4]);
					animation.add('greenholdend', [6]);
					animation.add('redholdend', [7]);
					animation.add('blueholdend', [5]);

					animation.add('purplehold', [0]);
					animation.add('greenhold', [2]);
					animation.add('redhold', [3]);
					animation.add('bluehold', [1]);
				}

				setGraphicSize(Std.int(width * Constants.PIXEL_ART_SCALE));
				updateHitbox();

			default:
				frames = Paths.getSparrowAtlas('NOTE_assets');

				animation.addByPrefix('greenScroll', 'green instance');
				animation.addByPrefix('redScroll', 'red instance');
				animation.addByPrefix('blueScroll', 'blue instance');
				animation.addByPrefix('purpleScroll', 'purple instance');

				animation.addByPrefix('purpleholdend', 'pruple end hold');
				animation.addByPrefix('greenholdend', 'green hold end');
				animation.addByPrefix('redholdend', 'red hold end');
				animation.addByPrefix('blueholdend', 'blue hold end');

				animation.addByPrefix('purplehold', 'purple hold piece');
				animation.addByPrefix('greenhold', 'green hold piece');
				animation.addByPrefix('redhold', 'red hold piece');
				animation.addByPrefix('bluehold', 'blue hold piece');

				setGraphicSize(Std.int(width * 0.7));
				updateHitbox();
				antialiasing = true;

				// colorSwap.colorToReplace = 0xFFF9393F;
				// colorSwap.newColor = 0xFF00FF00;

				// color = FlxG.random.color();
				// color.saturation *= 4;
				// replaceColor(0xFFC1C1C1, FlxColor.RED);
		}

		colorSwap = new ColorSwap();
		shader = colorSwap.shader;
		updateColors();

		x += swagWidth * data.int;
		animation.play(data.colorName + 'Scroll');

		// trace(prevNote);

		if (isSustainNote && prevNote != null)
		{
			alpha = 0.6;

			if (PreferencesMenu.getPref('downscroll'))
				angle = 180;

			x += width / 2;

			animation.play(data.colorName + 'holdend');

			updateHitbox();

			x -= width / 2;

			if (PlayState.instance.currentStageId.startsWith('school'))
				x += 30;

			if (prevNote.isSustainNote)
			{
				prevNote.animation.play(prevNote.colorName + 'hold');
				prevNote.updateHitbox();

				var scaleThing:Float = Math.round((Conductor.stepCrochet) * (0.45 * FlxMath.roundDecimal(SongLoad.getSpeed(), 2)));
				// get them a LIL closer together cuz the antialiasing blurs the edges
				if (antialiasing)
					scaleThing *= 1.0 + (1.0 / prevNote.frameHeight);
				prevNote.scale.y = scaleThing / prevNote.frameHeight;
				prevNote.updateHitbox();
			}
		}
	}

	override function destroy()
	{
		prevNote = null;

		super.destroy();
	}

	public function updateColors():Void
	{
		colorSwap.update(arrowColors[data.noteData]);
	}

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

		// mustPress indicates the player is the one pressing the key
		if (mustPress)
		{
			// miss on the NEXT frame so lag doesnt make u miss notes
			if (willMiss && !wasGoodHit)
			{
				tooLate = true;
				canBeHit = false;
			}
			else
			{
				if (!pastHalfWay && data.strumTime <= Conductor.songPosition)
				{
					pastHalfWay = true;
					noteSpeedMulti *= 2;
				}

				if (data.strumTime > Conductor.songPosition - HIT_WINDOW)
				{
					// * 0.5 if sustain note, so u have to keep holding it closer to all the way thru!
					if (data.strumTime < Conductor.songPosition + (HIT_WINDOW * (isSustainNote ? 0.5 : 1)))
						canBeHit = true;
				}
				else
				{
					canBeHit = true;
					willMiss = true;
				}
			}
		}
		else
		{
			canBeHit = false;

			if (data.strumTime <= Conductor.songPosition)
				wasGoodHit = true;
		}

		if (tooLate)
		{
			if (alpha > 0.3)
				alpha = 0.3;
		}
	}

	static public function fromData(data:NoteData, prevNote:Note, isSustainNote = false)
	{
		var result = new Note(data.strumTime, data.noteData, prevNote, isSustainNote);
		result.data = data;
		return result;
	}
}

typedef RawNoteData =
{
	var strumTime:Float;
	var noteData:NoteType;
	var sustainLength:Float;
	var noteKind:NoteKind;
}

@:forward
abstract NoteData(RawNoteData)
{
	public function new(strumTime = 0.0, noteData:NoteType = 0, sustainLength = 0.0, noteKind = NORMAL)
	{
		this = {
			strumTime: strumTime,
			noteData: noteData,
			sustainLength: sustainLength,
			noteKind: noteKind
		}
	}

	public var note(get, never):NoteType;

	inline function get_note()
		return this.noteData.value;

	public var int(get, never):Int;

	inline function get_int()
		return this.noteData.int;

	public var dir(get, never):NoteDir;

	inline function get_dir()
		return this.noteData.value;

	public var dirName(get, never):String;

	inline function get_dirName()
		return dir.name;

	public var dirNameUpper(get, never):String;

	inline function get_dirNameUpper()
		return dir.nameUpper;

	public var color(get, never):NoteColor;

	inline function get_color()
		return this.noteData.value;

	public var colorName(get, never):String;

	inline function get_colorName()
		return color.name;

	public var colorNameUpper(get, never):String;

	inline function get_colorNameUpper()
		return color.nameUpper;

	public var highStakes(get, never):Bool;

	inline function get_highStakes()
		return this.noteData.highStakes;

	public var lowStakes(get, never):Bool;

	inline function get_lowStakes()
		return this.noteData.lowStakes;
}

enum abstract NoteType(Int) from Int to Int
{
	// public var raw(get, never):Int;
	// inline function get_raw() return this;
	public var int(get, never):Int;

	inline function get_int()
		return this < 0 ? -this : this % 4;

	public var value(get, never):NoteType;

	inline function get_value()
		return int;

	public var highStakes(get, never):Bool;

	inline function get_highStakes()
		return this > 3;

	public var lowStakes(get, never):Bool;

	inline function get_lowStakes()
		return this < 0;
}

@:forward
enum abstract NoteDir(NoteType) from Int to Int from NoteType
{
	var LEFT = 0;
	var DOWN = 1;
	var UP = 2;
	var RIGHT = 3;
	var value(get, never):NoteDir;

	inline function get_value()
		return this.value;

	public var name(get, never):String;

	function get_name()
	{
		return switch (value)
		{
			case LEFT: "left";
			case DOWN: "down";
			case UP: "up";
			case RIGHT: "right";
		}
	}

	public var nameUpper(get, never):String;

	function get_nameUpper()
	{
		return switch (value)
		{
			case LEFT: "LEFT";
			case DOWN: "DOWN";
			case UP: "UP";
			case RIGHT: "RIGHT";
		}
	}
}

@:forward
enum abstract NoteColor(NoteType) from Int to Int from NoteType
{
	var PURPLE = 0;
	var BLUE = 1;
	var GREEN = 2;
	var RED = 3;
	var value(get, never):NoteColor;

	inline function get_value()
		return this.value;

	public var name(get, never):String;

	function get_name()
	{
		return switch (value)
		{
			case PURPLE: "purple";
			case BLUE: "blue";
			case GREEN: "green";
			case RED: "red";
		}
	}

	public var nameUpper(get, never):String;

	function get_nameUpper()
	{
		return switch (value)
		{
			case PURPLE: "PURPLE";
			case BLUE: "BLUE";
			case GREEN: "GREEN";
			case RED: "RED";
		}
	}
}

enum abstract NoteKind(String) from String to String
{
	/**
	 * The default note type.
	 */
	var NORMAL = "normal";
	var ALT = "alt";
}