'use strict';

window.chartColors = {
	red: 'rgb(255, 99, 132)',
	orange: 'rgb(255, 159, 64)',
	yellow: 'rgb(255, 205, 86)',
	green: 'rgb(75, 192, 192)',
	blue: 'rgb(54, 162, 235)',
	purple: 'rgb(153, 102, 255)',
	grey: 'rgb(201, 203, 207)'
};

(function(global) {
	var MONTHS = [
		'January',
		'February',
		'March',
		'April',
		'May',
		'June',
		'July',
		'August',
		'September',
		'October',
		'November',
		'December'
	];

	var COLORS = [
		'#4dc9f6',
		'#f67019',
		'#f53794',
		'#537bc4',
		'#acc236',
		'#166a8f',
		'#00a950',
		'#58595b',
		'#8549ba'
	];

	var Samples = global.Samples || (global.Samples = {});
	var Color = global.Color;

	Samples.utils = {
		// Adapted from http://indiegamr.com/generate-repeatable-random-numbers-in-js/
		srand: function(seed) {
			this._seed = seed;
		},

		rand: function(min, max) {
			var seed = this._seed;
			min = min === undefined ? 0 : min;
			max = max === undefined ? 1 : max;
			this._seed = (seed * 9301 + 49297) % 233280;
			return min + (this._seed / 233280) * (max - min);
		},

		numbers: function(config) {
			var cfg = config || {};
			var min = cfg.min || 0;
			var max = cfg.max || 1;
			var from = cfg.from || [];
			var count = cfg.count || 8;
			var decimals = cfg.decimals || 8;
			var continuity = cfg.continuity || 1;
			var dfactor = Math.pow(10, decimals) || 0;
			var data = [];
			var i, value;

			for (i = 0; i < count; ++i) {
				value = (from[i] || 0) + this.rand(min, max);
				if (this.rand() <= continuity) {
					data.push(Math.round(dfactor * value) / dfactor);
				} else {
					data.push(null);
				}
			}

			return data;
		},

		labels: function(config) {
			var cfg = config || {};
			var min = cfg.min || 0;
			var max = cfg.max || 100;
			var count = cfg.count || 8;
			var step = (max - min) / count;
			var decimals = cfg.decimals || 8;
			var dfactor = Math.pow(10, decimals) || 0;
			var prefix = cfg.prefix || '';
			var values = [];
			var i;

			for (i = min; i < max; i += step) {
				values.push(prefix + Math.round(dfactor * i) / dfactor);
			}

			return values;
		},

		years: function(config) {
		    var cfg = config || {};
		    var startYear = cfg.startYear || new Date().getFullYear();
		    var direction = cfg.direction || 'forward';
		    var count = cfg.count || 10;
		    var values = [];
		    var i;

		    for (i = 0; i < count; ++i) {
		      if (direction === 'backward') {
			    values.push(startYear - i);
			  } else {
			    values.push(startYear + i);
			  }
		    }

		    return direction==='backward'?values.reverse():values;
		},

		months: function(config) {
		    var cfg = config || {};
		    var count = cfg.count || 12;
		    var section = cfg.section || 3; // Default section to 3 characters if not provided
		    var direction = cfg.direction || 'forward'; // Default direction to 'forward' if not provided
		    var currentMonthIndex = new Date().getMonth(); // Get the current month index (0-11)
		    var values = [];
		    var i, value;

		    for (i = 0; i < count; ++i) {
		        if (direction === 'backward') {
		            value = MONTHS[(currentMonthIndex - i + 12) % 12];
		        } else {
		            value = MONTHS[(currentMonthIndex + i) % 12];
		        }
		        values.push(value.substring(0, section));
		    }

		    return direction==='backward'?values.reverse():values;
		},

		weeks: function(config) {
		    var cfg = config || {};
		    var count = cfg.count || 52;
		    var direction = cfg.direction || 'forward';
		    var format = cfg.format || 'dd/mm';
		    var joiner = cfg.joiner || ' - ';
		    var values = [];
		    var today = new Date();
		    var currentDayOfWeek = today.getDay(); // 0 for Sunday, 1 for Monday, ..., 6 for Saturday

		    // Adjust the current date to the beginning of the week (considering Monday as the start)
		    today.setDate(today.getDate() - currentDayOfWeek + (currentDayOfWeek === 0 ? -6 : 1));

		    for (var i = 0; i < count; ++i) {
		        // Calculate the start and end dates of the week
		        var startDate = new Date(today);
		        startDate.setDate(startDate.getDate() + (direction === 'backward' ? -7 * i : 7 * i));
		        var endDate = new Date(startDate);
		        endDate.setDate(endDate.getDate() + 6);

		        if(format=='dd/mm' && joiner==' - '){
		        	// Format the dates to "dd/mm" format
			        var formattedStartDate = startDate.toLocaleDateString('en-GB', { day: '2-digit', month: '2-digit' });
			        var formattedEndDate = endDate.toLocaleDateString('en-GB', { day: '2-digit', month: '2-digit' });
			        values.push(formattedStartDate + joiner + formattedEndDate);
		        }else if(format=='yyyy-mm-dd'){
		        	// Format the dates to "yyyy-mm-dd" format
		        	var formattedStartDate = startDate.toISOString().split('T')[0];
					var formattedEndDate = endDate.toISOString().split('T')[0];
					values.push(formattedStartDate + joiner + formattedEndDate);
		        }
		       
		    }

		    return direction==='backward'?values.reverse():values;
		},

		lastndays: function(config) {
			var cfg = config || {};
			var count = cfg.count || 12;
			var direction = cfg.direction || 'forward';
		    var format = cfg.format || 'dd/mm';
		    var joiner = cfg.joiner || ' - ';
		    var values = [];
			var today = new Date();

			for(var i=0;i<count;i++){
				var endDate = new Date(today);
		        endDate.setDate(endDate.getDate() + (-30*i));

		        var startDate=new Date(endDate);
		        startDate.setDate(startDate.getDate() - 29);

		        if(format=='dd/mm' && joiner==' - '){
			        var formattedStartDate = startDate.toLocaleDateString('en-GB', { day: '2-digit', month: '2-digit' });
			        var formattedEndDate = endDate.toLocaleDateString('en-GB', { day: '2-digit', month: '2-digit' });
			        values.push(formattedStartDate + joiner + formattedEndDate);
		        }else if(format=='yyyy-mm-dd'){
		        	var formattedStartDate = startDate.toISOString().split('T')[0];
					var formattedEndDate = endDate.toISOString().split('T')[0];
					values.push(formattedStartDate + joiner + formattedEndDate);
		        }
			}
			return direction==='backward'?values.reverse():values;
		},

		weeksrange: function(config) {
		    var cfg = config || {};
		    var count = cfg.count || 52;
		    var direction = cfg.direction || 'forward';
		    var format = cfg.format || 'dd/mm';
		    var joiner = cfg.joiner || ' - ';
		    var values = [];
		    var today = new Date();
		    var currentDayOfWeek = today.getDay(); // 0 for Sunday, 1 for Monday, ..., 6 for Saturday

		    // Adjust the current date to the beginning of the week (considering Monday as the start)
		    today.setDate(today.getDate() - currentDayOfWeek + (currentDayOfWeek === 0 ? -6 : 1));

		    for (var i = 0; i < count; ++i) {
		        // Calculate the start and end dates of the week
		        var startDate = new Date(today);
		        startDate.setDate(startDate.getDate() + (direction === 'backward' ? -7 * i : 7 * i));
		        var endDate = new Date(startDate);
		        endDate.setDate(endDate.getDate() + 6);

		        if(format=='dd/mm' && joiner==' - '){
		        	// Format the dates to "dd/mm" format
			        var formattedStartDate = startDate.toLocaleDateString('en-GB', { day: '2-digit', month: '2-digit' });
			        var formattedEndDate = endDate.toLocaleDateString('en-GB', { day: '2-digit', month: '2-digit' });
			        values.push(formattedStartDate + joiner + formattedEndDate);
		        }else if(format=='yyyy-mm-dd'){
		        	// Format the dates to "yyyy-mm-dd" format
		        	// var formattedStartDate = startDate.toISOString().split('T')[0];
					// var formattedEndDate = endDate.toISOString().split('T')[0];
					// values.push(formattedStartDate + joiner + formattedEndDate);
					var startDateString = startDate.toLocaleDateString('en-GB',{year: 'numeric', month: '2-digit', day: '2-digit'});
					var endDateString = endDate.toLocaleDateString('en-GB',{year: 'numeric', month: '2-digit', day: '2-digit'});
					var [startDay, startMonth, startYear] = startDateString.split('/');
					var [endDay, endMonth, endYear] = endDateString.split('/');
					var formattedStartDate = `${startYear}-${startMonth}-${startDay}`;
					var formattedEndDate = `${endYear}-${endMonth}-${endDay}`;
					values.push(formattedStartDate + joiner + formattedEndDate);
		        }
		       
		    }

		    return direction==='backward'?values.reverse():values;
		},
		monthsrange: function(config) {
		    var cfg = config || {};
		    var count = cfg.count || 12;
		    var direction = cfg.direction || 'forward';
		    var format = cfg.format || 'mm/yyyy';
		    var joiner = cfg.joiner || ' - ';
		    var values = [];
		    var today = new Date();
		    var currentMonth = today.getMonth(); // 0 for January, 1 for February, ..., 11 for December
		    today.setDate(1); // Set the day to 1st to get the beginning of the current month

		    for (var i = 0; i < count; ++i) {
		        // Calculate the start and end dates of the month
		        var startDate = new Date(today);
		        startDate.setMonth(startDate.getMonth() + (direction === 'backward' ? -i : i));
		        var endDate = new Date(startDate);
		        endDate.setMonth(endDate.getMonth() + 1);
		        endDate.setDate(endDate.getDate() - 1);

		        if (format === 'mm/yyyy' && joiner === ' - ') {
		            // Format the dates to "mm/yyyy" format
		            var formattedStartDate = (startDate.getMonth() + 1).toString().padStart(2, '0') + '/' + startDate.getFullYear();
		            var formattedEndDate = (endDate.getMonth() + 1).toString().padStart(2, '0') + '/' + endDate.getFullYear();
		            values.push(formattedStartDate + joiner + formattedEndDate);
		        } else if (format === 'yyyy-mm') {
		            // Format the dates to "yyyy-mm" format
		            var formattedStartDate = startDate.getFullYear() + '-' + (startDate.getMonth() + 1).toString().padStart(2, '0');
		            var formattedEndDate = endDate.getFullYear() + '-' + (endDate.getMonth() + 1).toString().padStart(2, '0');
		            values.push(formattedStartDate + joiner + formattedEndDate);
		        }else if (format === 'yyyy-mm-dd') {
		            // Format the dates to "yyyy-mm-dd" format
		            // var formattedStartDate = startDate.toISOString().split('T')[0];
		            // var formattedEndDate = endDate.toISOString().split('T')[0];
		            // values.push(formattedStartDate + joiner + formattedEndDate);
		            var startDateString = startDate.toLocaleDateString('en-GB',{year: 'numeric', month: '2-digit', day: '2-digit'});
					var endDateString = endDate.toLocaleDateString('en-GB',{year: 'numeric', month: '2-digit', day: '2-digit'});
					var [startDay, startMonth, startYear] = startDateString.split('/');
					var [endDay, endMonth, endYear] = endDateString.split('/');
					var formattedStartDate = `${startYear}-${startMonth}-${startDay}`;
					var formattedEndDate = `${endYear}-${endMonth}-${endDay}`;
					values.push(formattedStartDate + joiner + formattedEndDate);
		        }
		    }

		    return direction === 'backward' ? values.reverse() : values;
		},
		yearsrange: function(config) {
		    var cfg = config || {};
		    var count = cfg.count || 10;
		    var direction = cfg.direction || 'forward';
		    var format = cfg.format || 'yyyy';
		    var joiner = cfg.joiner || ' - ';
		    var values = [];
		    var today = new Date();

		    for (var i = 0; i < count; ++i) {
		        // Calculate the start and end dates of the year
		        var startYear = today.getFullYear() + (direction === 'backward' ? -i : i);
		        var startDate = new Date(startYear, 0, 1);
		        var endDate = new Date(startYear, 11, 31);

		        if (format === 'yyyy' && joiner === ' - ') {
		            // Format the dates to "yyyy" format
		            values.push(startYear.toString());
		        } else if (format === 'yyyy-mm-dd') {
		            // Format the dates to "yyyy-mm-dd" format
		            // var formattedStartDate = startDate.toISOString().split('T')[0];
		            // var formattedEndDate = endDate.toISOString().split('T')[0];
		            // values.push(formattedStartDate + joiner + formattedEndDate);
		            var startDateString = startDate.toLocaleDateString('en-GB',{year: 'numeric', month: '2-digit', day: '2-digit'});
					var endDateString = endDate.toLocaleDateString('en-GB',{year: 'numeric', month: '2-digit', day: '2-digit'});
					var [startDay, startMonth, startYear] = startDateString.split('/');
					var [endDay, endMonth, endYear] = endDateString.split('/');
					var formattedStartDate = `${startYear}-${startMonth}-${startDay}`;
					var formattedEndDate = `${endYear}-${endMonth}-${endDay}`;
					values.push(formattedStartDate + joiner + formattedEndDate);
		        }
		    }

		    return direction === 'backward' ? values.reverse() : values;
		},

		months_: function(config) {
			var cfg = config || {};
			var count = cfg.count || 12;
			var section = cfg.section;
			var values = [];
			var i, value;

			for (i = 0; i < count; ++i) {
				value = MONTHS[Math.ceil(i) % 12];
				values.push(value.substring(0, section));
			}

			return values;
		},

		weeks_: function(config) {
		    var cfg = config || {};
		    var count = cfg.count || 52;
		    var values = [];
		    var i;

		    for (i = 0; i < count; ++i) {
		      values.push("Week " + (i + 1));
		    }

		    return values;
		},

		color: function(index) {
			return COLORS[index % COLORS.length];
		},

		transparentize: function(color, opacity) {
			var alpha = opacity === undefined ? 0.5 : 1 - opacity;
			return Color(color).alpha(alpha).rgbString();
		},

		formatnumber: function(config) {
			var cfg = config || {};
		    var number = cfg.number || 0;
		    var glue = cfg.glue || ',';
        	return number.toString().replace(/\B(?=(\d{3})+(?!\d))/g,glue);
    	},
    	capitalize: function(str) {
		    // Check if the string is not empty
		    if (str && typeof str === 'string') {
		        // Capitalize the first letter and concatenate the rest of the string
		        return str.charAt(0).toUpperCase() + str.slice(1);
		    } else {
		        // If the input is not a valid string, return an empty string or handle it as needed
		        return '';
		    }
		}
	};

	// DEPRECATED
	window.randomScalingFactor = function() {
		return Math.round(Samples.utils.rand(-100, 100));
	};

	// INITIALIZATION

	Samples.utils.srand(Date.now());

	// Google Analytics
	/* eslint-disable */
	if (document.location.hostname.match(/^(www\.)?chartjs\.org$/)) {
		(function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
		(i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
		m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
		})(window,document,'script','//www.google-analytics.com/analytics.js','ga');
		ga('create', 'UA-28909194-3', 'auto');
		ga('send', 'pageview');
	}
	/* eslint-enable */

}(this));