/**
 * Jquery plugin to render like contribution graph on Github.
 *
 * @see       {@link https://github.com/bachvtuan/Github-Contribution-Graph}
 * @author    bachvtuan@gmail.com
 * @license   MIT License
 * @since     0.1.0
 */

//Format string
if (!String.prototype.formatString) {
	String.prototype.formatString = function () {
		var args = arguments;
		return this.replace(/{(\d+)}/g, function (match, number) {
			return typeof args[number] != "undefined" ? args[number] : match;
		});
	};
}

(function ($) {
	$.fn.github_graph = function (options) {
		//If the number less than 10, add Zero before it
		var prettyNumber = function (number) {
			return number < 10
				? "0" + number.toString()
				: (number = number.toString());
		};

		/*
          Count the number on each day and store the object
          */
		var processListTimeStamp = function (list_timestamp) {
			//The result will store into this varriable
			obj_timestamp = {};
			for (var i = 0; i < list_timestamp.length; i++) {
				var _type = typeof list_timestamp[i];
				var _d =
					_type == "number"
						? new Date(list_timestamp[i])
						: new Date(list_timestamp[i].timestamp);

				var display_date = getDisplayDate(_d);
				var increase = _type == "number" ? 1 : list_timestamp[i].count;
				if (!obj_timestamp[display_date]) {
					obj_timestamp[display_date] = increase;
				} else {
					obj_timestamp[display_date] += increase;
				}
			}
		};

		var getDisplayDate = function (date_obj) {
			var pretty_month = prettyNumber(date_obj.getMonth() + 1);
			var pretty_date = prettyNumber(date_obj.getDate());
			return "{0}-{1}-{2}".formatString(
				date_obj.getFullYear(),
				pretty_month,
				pretty_date
			);
		};

		var getCount = function (display_date) {
			if (obj_timestamp[display_date]) {
				return obj_timestamp[display_date];
			}
			return 0;
		};

		var getColor = function (count) {
			if (typeof settings.colors[0] == "string") {
				return count > settings.colors.length - 1
					? settings.colors[settings.colors.length - 1]
					: settings.colors[count];
			}

			const isLargeNumber = (element) => element.count > count;
			i = settings.colors.findIndex(isLargeNumber);
			return i == -1
				? settings.colors[settings.colors.length - 1].color
				: settings.colors[i - 1].color;
		};

		var start = function () {
			processListTimeStamp(settings.data);
			var wrap_chart = _this;

			settings.colors_length = settings.colors.length;
			var radius = settings.border.radius;
			var hoverColor = settings.border.hover_color;
			var clickCallback = settings.click;

			var start_date;
			if (settings.start_date == null) {
				// if set null, will get from 365 days from now
				start_date = new Date();
				start_date.setMonth(start_date.getMonth() - 12);
				start_date.setDate(start_date.getDate() + 1);
			} else {
				// formats:
				// - YYYY-MM-DD
				// - YYYY/MM/DD
				start_date = new Date(settings.start_date);
			}

			end_date = new Date(start_date);
			end_date.setMonth(end_date.getMonth() + 12);
			end_date.setDate(end_date.getDate() - 1);

			var loop_html = "";
			var step = 13;

			var month_position = [];
			month_position.push({ month_index: start_date.getMonth(), x: 0 });
			var using_month = start_date.getMonth();

			var week = 0;
			var g_x = week * step;
			var item_html =
				'<g transform="translate(' + g_x.toString() + ', 0)">';

			for (
				;
				start_date.getTime() <= end_date.getTime();
				start_date.setDate(start_date.getDate() + 1)
			) {
				if (start_date.getDay() == 0) {
					var item_html =
						'<g transform="translate(' + g_x.toString() + ', 0)">';
				}

				var month_in_day = start_date.getMonth();
				var data_date = getDisplayDate(start_date);

				if (start_date.getDay() == 0 && month_in_day != using_month) {
					using_month = month_in_day;
					month_position.push({ month_index: using_month, x: g_x });
				}
				var count = getCount(data_date);
				var color = getColor(count);

				var y = start_date.getDay() * step;
				item_html +=
					'<rect class="day" width="11" height="11" y="' +
					y +
					'" fill="' +
					color +
					'" data-count="' +
					count +
					'" data-date="' +
					data_date +
					'" rx="' +
					radius +
					'" ry="' +
					radius +
					'"/>';

				if (start_date.getDay() == 6) {
					item_html += "</g>";
					loop_html += item_html;

					item_html = null;

					week++;
					g_x = week * step;
				}
			}

			if (item_html != null) {
				item_html += "</g>";
				loop_html += item_html;
			}

			//trick
			if (month_position[1].x - month_position[0].x < 40) {
				//Fix ugly graph by remove first item
				month_position.shift(0);
			}

			for (var i = 0; i < month_position.length; i++) {
				var item = month_position[i];
				var month_name = settings.month_names[item.month_index];
				loop_html +=
					'<text x="' +
					item.x +
					'" y="-5" class="month">' +
					month_name +
					"</text>";
			}

			//Add Monday, Wenesday, Friday label
			loop_html +=
				'<text text-anchor="middle" class="wday" dx="-10" dy="22">{0}</text>'.formatString(
					settings.h_days[0]
				) +
				'<text text-anchor="middle" class="wday" dx="-10" dy="48">{0}</text>'.formatString(
					settings.h_days[1]
				) +
				'<text text-anchor="middle" class="wday" dx="-10" dy="74">{0}</text>'.formatString(
					settings.h_days[2]
				);

			//Fixed size for now with width= 721 and height = 110
			var wire_html =
				'<svg width="721" height="110" viewBox="0 0 721 110"  class="js-calendar-graph-svg">' +
				'<g transform="translate(20, 20)">' +
				loop_html +
				"</g>" +
				"</svg>";

			wrap_chart.html(wire_html);

			$(_this)
				.find(".day")
				.on("click", function () {
					if (clickCallback) {
						clickCallback(
							$(this).attr("data-date"),
							parseInt($(this).attr("data-count"))
						);
					}
				});

			$(_this)
				.find(".day")
				.hover(
					function () {
						$(this).attr(
							"style",
							"stroke-width: 1; stroke: " + hoverColor
						);
					},
					function () {
						$(this).attr("style", "stroke-width:0");
					}
				);

			_this.find("rect").on("mouseenter", mouseEnter);
			_this.find("rect").on("mouseleave", mouseLeave);
			appendTooltip();
		};

		var mouseLeave = function (evt) {
			$(".svg-tip").hide();
		};

		//handle event mouseenter when enter into rect element
		var mouseEnter = function (evt) {
			var target_offset = $(evt.target).offset();
			var count = $(evt.target).attr("data-count");
			var date = $(evt.target).attr("data-date");

			var count_text = count > 1 ? settings.texts[1] : settings.texts[0];
			var text = "{0} {1} on {2}".formatString(count, count_text, date);

			var svg_tip = $(".svg-tip").show();
			svg_tip.html(text);
			var svg_width = Math.round(svg_tip.width() / 2 + 5);
			var svg_height = svg_tip.height() * 2 + 10;

			svg_tip.css({ top: target_offset.top - svg_height - 5 });
			svg_tip.css({ left: target_offset.left - svg_width });
		};
		//Append tooltip to display when mouse enter the rect element
		//Default is display:none
		var appendTooltip = function () {
			if ($(".svg-tip").length == 0) {
				$("body").append(
					'<div class="svg-tip svg-tip-one-line" style="display:none" ></div>'
				);
			}
		};

		var settings = $.extend(
			{
				colors: ["#eeeeee", "#d6e685", "#8cc665", "#44a340", "#44a340"],
				border: {
					radius: 2,
					hover_color: "#999",
				},
				click: null,
				start_date: null,
				//List of name months
				month_names: [
					"Jan",
					"Feb",
					"Mar",
					"Apr",
					"May",
					"Jun",
					"Jul",
					"Aug",
					"Sep",
					"Oct",
					"Nov",
					"Dec",
				],
				h_days: ["M", "W", "F"],
				//Default is empty, it can be overrided
				data: [],
			},
			options
		);

		var _this = $(this);

		start();
	};
})(jQuery);