function getRGB() {
	var r = Math.floor(Math.random() * 255);
	var g = Math.floor(Math.random() * 255);
	var b = Math.floor(Math.random() * 255);
	return [r, g, b];
}

function getHex(rgb) {
	var hex = "";
	rgb.forEach(function (val) {
		var hexPartial = Number(val).toString(16);
		if (hexPartial.length < 2) {
			hexPartial = "0" + hexPartial;
		}
		hex = hex + hexPartial;
	});
	return hex;
}

function getCMYK(rgb) {
	var finalK = 0;

	var r = rgb[0];
	var g = rgb[1];
	var b = rgb[2];

	if (r === 0 && g === 0 && b === 0) {
		finalK = 1;
		return [0, 0, 0, 1];
	}

	var finalC = 1 - r / 255;
	var finalM = 1 - g / 255;
	var finalY = 1 - b / 255;

	var minCMY = Math.min(finalC, Math.min(finalM, finalY));
	finalC = Math.trunc(((finalC - minCMY) / (1 - minCMY)) * 100);
	finalM = Math.trunc(((finalM - minCMY) / (1 - minCMY)) * 100);
	finalY = Math.trunc(((finalY - minCMY) / (1 - minCMY)) * 100);
	finalK = Math.trunc(minCMY * 100);

	return finalC + "," + finalM + "," + finalY + "," + finalK;
}

function getContrast(rgb) {
	return (299 * rgb[0] + 587 * rgb[1] + 114 * rgb[2]) / 1000;
}

function generate(elements) {
	elements.each(function (index, column) {
		let rgb = getRGB();
		$(column).find(".color-rgb").text(`(${rgb})`);
		$(column)
			.find(".color-hex")
			.text("#" + getHex(rgb));
		$(column)
			.find(".color-cmyk")
			.text(`(${getCMYK(rgb)})`);
		$(column).css("background-color", `rgb(${rgb})`);
		if (getContrast(rgb) < 123) {
			$(column).addClass("text-white");
		} else {
			$(column).removeClass("text-white");
		}
	});
}

function regenerate() {
	generate($(".color-column[data-locked='false']"));
}

function copy(type, text) {
	var $tempTextField = $("<input>");
	$("body").append($tempTextField);
	switch (type) {
		case "rgb":
			$tempTextField.val("rgb" + text).select();
			break;
		case "hex":
			$tempTextField.val(text).select();
			break;
		case "cmyk":
			$tempTextField.val("cmyk" + text).select();
			break;
	}
	document.execCommand("copy");
	$tempTextField.remove();
}

function showToast(type, text) {
	var alert =
		"<div class='toast-alert alert alert-" +
		type +
		"' role='alert'>" +
		text +
		"</div>";
	$(".container-fluid").append(alert);
	$(".toast-alert").animate(
		{
			opacity: 0,
		},
		2000,
		function () {
			$(this).remove();
		}
	);
}

function init() {
	regenerate();

	$(".color-value").click(function (e) {
		var text = $(e.target).text();
		copy($(e.target).data("format"), text);
		showToast("success", "Color code copied to clipboard.");
	});

	$(".color-column-lock").click(function (e) {
		var icon = $(e.target);
		var column = $(e.target).parent().parent();
		var status = column.attr("data-locked");
		if (status === "true") {
			column.attr("data-locked", "false");
		} else {
			column.attr("data-locked", "true");
		}
		icon.toggleClass(["fa-lock-open", "fa-lock"]);
	});

	$(".color-column-regenerate").click(function (e) {
		generate($(e.target).parent().parent());
	});

	$("#submitNewColor").click(function (e) {
		setNewColor(getNewColor(e));
	});

	loadAllPalettes();
}

function setNewColor(values) {
	var column = $(".color-column:eq(" + (parseInt(values[1]) - 1) + ")");
	var rgb = JSON.parse("[" + values[0] + "]");
	$(column).find(".color-rgb").text(`(${rgb})`);
	$(column)
		.find(".color-hex")
		.text("#" + getHex(rgb));
	$(column)
		.find(".color-cmyk")
		.text(`(${getCMYK(rgb)})`);
	$(column).css("background-color", `rgb(${rgb})`);
	if (getContrast(rgb) < 123) {
		$(column).addClass("text-white");
	} else {
		$(column).removeClass("text-white");
	}
}

function getNewColor(e) {
	var string = $(e.target).closest(".modal-content").find("input").val();
	var newString = string.replace("(", "").replace(")", "").replace("rgb", "");
	var column = $(e.target)
		.closest(".modal-content")
		.find("select option:selected")
		.text();
	return [newString, column];
}

function switchTheme() {
	$("body").toggleClass("custom-bg");
	$(".fa-moon").toggleClass("d-none");
	$(".fa-sun").toggleClass("d-none");
	$(".color-column-labels").toggleClass("text-white");
}

function storePalette(keysObject, paletteName) {
	// Query object of all rgb colors and store text values in new object
	var rgbDOMObject = $(".color-rgb");
	var rgbStorageObject = {
		0: $(rgbDOMObject[0]).text().replace("(", "").replace(")", ""),
		1: $(rgbDOMObject[1]).text().replace("(", "").replace(")", ""),
		2: $(rgbDOMObject[2]).text().replace("(", "").replace(")", ""),
		3: $(rgbDOMObject[3]).text().replace("(", "").replace(")", ""),
		4: $(rgbDOMObject[4]).text().replace("(", "").replace(")", ""),
	};
	// Generate random key, ensure it doesn't exist already, then save the key in storage
	var randomKey = generateRandomKey();
	if (keysObject === null) {
		var newKeysObject = {};
		newKeysObject[paletteName] = randomKey;
	} else {
		var newKeysObject = keysObject;
		newKeysObject[paletteName] = randomKey;
	}
	localStorage.setItem("paletteKeys", JSON.stringify(newKeysObject));
	// Save color palette object
	localStorage.setItem(randomKey, JSON.stringify(rgbStorageObject));

	return randomKey;
}

function savePalette() {
	// Get palette names object and user input of new palette name
	var keysObject = JSON.parse(localStorage.getItem("paletteKeys"));
	var paletteName = $("#inputPaletteName").val();
	var nameCheck = false;
	// Check palette name exists
	if (keysObject !== null && paletteName in keysObject) {
		nameCheck = true;
	}
	if (typeof Storage !== "undefined") {
		// If the input name is null or empty, show an error alert
		if (
			paletteName === null ||
			paletteName == "undefined" ||
			paletteName == ""
		) {
			alert("Error: You must enter a valid name for this palette.");
		} else if (keysObject != null && nameCheck === true) {
			// If the name exists, ask user to confirm
			var userConfirmation = confirm(
				"Palette name exists. Do you want to overwrite this palette?"
			);
			// If the user confirms, save the palette
			if (userConfirmation) {
				var randomKey = storePalette(keysObject, paletteName);
				$("#savedPalettesBody").append(
					"<button class='btn btn-outline-secondary my-2 w-100' onclick='loadPalette(" +
						randomKey +
						")'>" +
						paletteName +
						"</button>"
				);
				showToast("success", "Color palette saved.");
			}
		} else {
			// If the name doesn't exist, save palette
			var randomKey = storePalette(keysObject, paletteName);
			$("#savedPalettesBody").append(
				"<div id='" +
					randomKey +
					"' class='my-2 d-flex'><div class='btn-group w-100' role='group' aria-label='Saved palette'><button class='btn btn-secondary w-100' onclick='loadPalette(" +
					randomKey +
					")'>" +
					paletteName +
					"</button><button class='btn btn-danger' onclick='deletePalette(" +
					randomKey +
					")'><i class='far fa-trash-alt'></i></button></div></div>"
			);
			showToast("success", "Color palette saved.");
		}
	} else {
		alert(
			"Sorry, your browser does not support Web Storage. Please ugrade your browser and try again."
		);
	}
}

function loadAllPalettes() {
	if (typeof Storage !== "undefined") {
		var fetchedData = localStorage.getItem("paletteKeys");
		if (fetchedData === null) {
			console.log("Warning: No palettes exist.");
		} else {
			$.each(JSON.parse(fetchedData), function (key, value) {
				var palette = localStorage.getItem(key);
				$("#savedPalettesBody").append(
					"<div id='" +
						value +
						"' class='my-2 d-flex'><div class='btn-group w-100' role='group' aria-label='Saved palette'><button class='btn btn-secondary w-100' onclick='loadPalette(" +
						value +
						")'>" +
						key +
						"</button><button class='btn btn-danger' onclick='deletePalette(" +
						value +
						")'><i class='far fa-trash-alt'></i></button></div></div>"
				);
				$("#editColorModal").modal("hide");
			});
			showToast("success", "Color palettes loaded.");
		}
	} else {
		alert(
			"Sorry, your browser does not support Web Storage. Please ugrade your browser and try again."
		);
	}
}

function loadPalette(requestedKey) {
	var fetchedData = localStorage.getItem("paletteKeys");
	$.each(JSON.parse(fetchedData), function (key, value) {
		var newValue = parseInt(value, 10);
		if (requestedKey === newValue) {
			var palette = localStorage.getItem(value);
			$.each(JSON.parse(palette), function (subKey, subValue) {
				var col = parseInt(subKey, 10) + 1;
				setNewColor([subValue, col]);
			});
		}
		$("#editColorModal").modal("hide");
	});
}

function deleteAllPalettes() {
	var confirmation = confirm("Are you sure you want to delete all palettes?");
	if (confirmation) {
		$("#savedPalettesBody button").remove();
		localStorage.clear();
	}
}

function deletePalette(id) {
	var confirmation = confirm("Are you sure you want to delete this palette?");
	if (confirmation) {
		// Get name of palette by the id
		var keysObject = JSON.parse(localStorage.getItem("paletteKeys"));
		var name = getKeyByValue(keysObject, id);
		// Remove the button
		$("#" + id).remove();
		// Remove local storage item
		localStorage.removeItem(id);
		// Remove item from paletteKeys
		delete keysObject[name];
		// Set new paletteKeys object
		var newKeysObject = keysObject;
		localStorage.setItem("paletteKeys", JSON.stringify(newKeysObject));
	}
}

function generateRandomKey() {
	// Generate random key
	var randomKey = Math.floor(Math.random() * 9007199254740992 + 1);
	// Check if random key exists (up to 100 times)
	for (var i = 0; i < 100; i++) {
		// If the key exists, generate a new key
		if (checkKey(randomKey) === true) {
			randomKey = Math.floor(Math.random() * 9007199254740992 + 1);
		}
		// If the key does not exist, break the loop and return the key
		else {
			break;
		}
	}
	return randomKey;
}

function checkKey(key) {
	// Fetch paletteKeys object
	var keysObject = localStorage.getItem("paletteKeys");
	// If object is null, it doesn't exist yet
	if (keysObject !== null) {
		// If object exists, parse it and check to see if the key exists
		var tempObject = JSON.parse(keysObject);
		if (tempObject.hasOwnProperty(key.toString())) {
			return true;
		} else {
			return false;
		}
	}
}

function saveImage() {
	// Remove previous image
	$("#saveImageModal img").remove();
	// Hide toolbar so it doesn't appear in screenshot
	$(".color-column-toolbar").hide();
	// Set background color of canvas based on body
	var bgColor = $("body").hasClass("custom-bg") ? "#000000" : "#FFFFFF";
	// Get canvas and launch modal
	html2canvas(document.getElementsByClassName("container-fluid")[0], {
		backgroundColor: bgColor,
	}).then(function (canvas) {
		$(".color-column-toolbar").show();
		var img = canvas.toDataURL("image/png");
		$("#saveImageModal").modal("show");
		$("#saveImageModal .modal-body").append(
			'<img id="palette-image" class="img-fluid" src="' + img + '"/>'
		);
	});
}

function getKeyByValue(object, value) {
	for (var i = 0; i < Object.keys(object).length; i++) {
		var key = Object.keys(object)[i];
		var fetchedValue = object[key];
		if (value === fetchedValue) {
			return key;
		}
	}
}