define(function () {
	"use strict";

	var oPage;

	function datePromptPresets() {
	};


	datePromptPresets.prototype.draw = function (oControlHost) {
		oPage = oControlHost.page;

		var elDate = oControlHost.container;
		elDate.innerHTML =
		'<style>' +
			'.myButtonDate { height:32px; width:180px; cursor:pointer; margin-left:5px; color:#4178BE; font-size:14px; padding:6px 12px 6px 12px; background-color:white; border:1px solid #4178BE; }' +
			'.myButtonDate:hover { background-color:#4178BE; color:white; border:1px solid #4178BE; }' +
		'</style>' +
		'<button class="myButtonDate btnYesterday" type="button">Yesterday</button>' +
		'<button class="myButtonDate btnCurrentYTD" type="button">Current YTD</button>' +
		'<button class="myButtonDate btnPreviousMonth" type="button">Previous Month</button>' +
		'<button class="myButtonDate btnPreviousYear" type="button">Previous Year</button>';

		elDate.querySelector(".btnYesterday").onclick = setDatePreset.bind(null, "Yesterday");
		elDate.querySelector(".btnCurrentYTD").onclick = setDatePreset.bind(null, "YTD");
		elDate.querySelector(".btnPreviousMonth").onclick = setDatePreset.bind(null, "PreviousMonth");
		elDate.querySelector(".btnPreviousYear").onclick = setDatePreset.bind(null, "PreviousYear");

	};


	function setDatePreset(timeFrame) {
		// Calculate the date range start date
		var dateRangeStart = calculateRangeStart(timeFrame);

		// Calculate the date range end date
		var dateRangeEnd = calculateEndDate(dateRangeStart, timeFrame);

		// Encode the date range as JSON
		var JSONEncodedDates = EncodeDateRangeAsJSON(dateRangeStart, dateRangeEnd);

		// Set the Date prompt using the JSON encoded date range
		setDatePrompt(JSONEncodedDates);
	};



	/*
	 *
	 * This is the only function that actually uses the prompt JavaScript API using it to perform three operations
	 * 	Creates a report object
	 *	Create a prompt object
	 *	Set the prompt values
	 *
	 * Function arguments:
	 *	@JSONEncodedDates is a date range with use values range start and end dates 
	 *
	 */
	function setDatePrompt(JSONEncodedDates) {
		// Create a prompt object using the prompt name set in Report Studio
		var datePrompt = oPage.getControlByName("DatePrompt");

		// Set the prompt values using the JSON encoded dates
		datePrompt.addValues([JSONEncodedDates]);
	};



	/*
	 *
	 * This function encodes the range start and end use values into as JSON. In other words, into
	 * JavaScript Literal Notation such as
	 *	{ 'start': {'use': '2012-01-08'}, 'end': {'use': '2012-02-08'} }
	 *
	 * Function arguments:
	 *	@dateRangeStart - a date object for the range start date
	 *	@dateRangeEnd - a date object for the range end date
	 *
	 */
	function EncodeDateRangeAsJSON(dateRangeStart, dateRangeEnd) {
		// Encode the date range as JSON (JavaScript Literal Notation)

		// The following steps will create string representation of the date range start and end dates 
		// in the format yyyy-mm-dd such as 2012-01-12 for to encode into JSON

		// First, get the year, month and day parts of the date range start
		var yearPart = dateRangeStart.getFullYear();
		var monthPart = dateRangeStart.getMonth() + 1;		// Add 1 month for base zero month (Jan = month 0)
		var dayPart = dateRangeStart.getDate();

		// Second, create the string representation of the date range start
		var startDateString = yearPart + "-" + monthPart + "-" + dayPart;

		// Third, get the year, month and day parts of the date range end
		var yearPart = dateRangeEnd.getFullYear();
		var monthPart = dateRangeEnd.getMonth() + 1;		// Add 1 month for base zero month (Jan = month 0)
		var dayPart = dateRangeEnd.getDate();

		// Lastly, create the string representation of the date range end
		var endDateString = yearPart + "-" + monthPart + "-" + dayPart;

		// Now that we have our dates as strings, encode the date range as JSON (JavaScript Literal Notation)
		var JSONEncodedDateRange = {
			'start': {
				'use': startDateString
			}, 'end': {
				'use': endDateString
			}
		};

		return JSONEncodedDateRange;
	};



	/*
	 *
	 * This function calculates the date range start date using today's date as the baseline.
	 *
	 * Function arguments:
	 *	@timeFrame is a string passed to this function to determine the date range. Valid values are:
	 *		- Yesterday (set range yesterday and today)
	 *		- YTD
	 *		- PreviousMonth
	 *		- PreviousQuarter
	 *		- PreviousYear
	 */
	function calculateRangeStart(timeFrame) {

		// Get the system year and month
		var currentDate = new Date();

		// Extract year, month and day components as numbers from current date 
		var currentYear = currentDate.getFullYear();
		var currentMonth = currentDate.getMonth(); 	// zero based, January is month 0
		var currentDay = currentDate.getDate();	// 1 based

		if (timeFrame == "Yesterday") {
			// Calculate yesterdays date including determining if yesterday was in a previous Month and/or Year

			// If today is not the first day of the month, subtract one day and keep the same month and year
			if (currentDay != 1) {
				var rangeStartYear = currentYear;
				var rangeStartMonth = currentMonth;
				var rangeStartDay = currentDay - 1;
			} else { 								// Today is the first day of the month so set month to previous month
				if (currentMonth != 0) {			// First day of Feb through December
					// The Date.setFullYear will return the last day of the previous month if you pass zero as the day
					var workingDate = new Date;
					workingDate.setFullYear(currentYear, currentMonth, 0);

					var rangeStartYear = workingDate.getYear();
					var rangeStartMonth = workingDate.getMonth();
					var rangeStartDay = workingDate.getDate();

				} else {						// First day of January
					// The Date.setFullYear will return the last day of the previous month if you pass zero as the day
					var workingDate = new Date;
					workingDate.setFullYear(currentYear, currentMonth, 0);

					var rangeStartYear = workingDate.getYear();
					var rangeStartMonth = workingDate.getMonth();
					var rangeStartDay = workingDate.getDate();

				}
			}

		} else if (timeFrame == "PreviousMonth") {
			// Calculate the first day of the previous month based on today's date

			// Set Current Month to previous Month (and Current Year as required)
			if (currentMonth == 0) { //set month and year to previous december and year
				var rangeStartMonth = 11;
				var rangeStartYear = currentYear - 1;
			} else { // set to previous month in same year
				rangeStartMonth = currentMonth - 1;
				var rangeStartYear = currentYear;
			}
			var rangeStartDay = 1; // Always first day of month

		} else if (timeFrame == "YTD") {
			// Calculate the first day of the year based on today's date
			var rangeStartYear = currentYear;
			var rangeStartMonth = 0; 	// Always January
			var rangeStartDay = 1; 		// Always first day of month

		} else if (timeFrame == "PreviousQuarter") {
			// Calculate the first day of the previous calendar quarter month based on today's date
			// Quarters Conversion is:
			//	Q1 = January to March (Month 0 to 2)  	>>> October (9) Previous year
			//	Q2 = April to June (Month 3 to 5)		>>> January (Zero) Same year
			//	Q3 = July to September (Month 6 to 8)		>>> April (3) Same year
			//	Q4 = October to December (Month 9 to 11)	>>> July (6) Same year

			// Set Quarter and Year
			if (currentMonth <= 2) {
				var rangeStartMonth = 9; 			// October
				var rangeStartYear = currentYear - 1;		// Previous year
			} else if (currentMonth <= 5) {
				var rangeStartMonth = 0; 			// January
				var rangeStartYear = currentYear;		// Same year
			} else if (currentMonth <= 8) {
				var rangeStartMonth = 3; 			// April
				var rangeStartYear = currentYear;		// Same year
			} else {
				rangeStartMonth = 6;			// July
				var rangeStartYear = currentYear;		// Same year
			}
			var rangeStartDay = 1; 				// Always first day of month

		} else if (timeFrame == "PreviousYear") {
			var rangeStartYear = currentYear - 1;
			var rangeStartMonth = 0; 		// Always January
			var rangeStartDay = 1; 		// Always first day of month
		} else {
			alert("Invalid Time Frame");
		}
		var rangeStart = new Date(rangeStartYear, rangeStartMonth, rangeStartDay);

		return rangeStart;
	};

	/*
	*
	* This function calculates the date range end date based on the passed time frame and start date
	*
	*/
	function calculateEndDate(dateRangeStart, timeFrame) {
		// Calculate the end of the date range based on the passed time frame

		// Extract Year, Month and Day from passed in dateRangeStart
		var workingYear = dateRangeStart.getFullYear();
		var workingMonth = dateRangeStart.getMonth();
		var workingDay = dateRangeStart.getDate();

		if (timeFrame == "Yesterday") {
			// use today's date
			dateRangeEnd = new Date();
		} else if (timeFrame == "PreviousMonth") {
			// Calculate the last day of the passed month
			// The Date.setFullYear will return the last day of the previous month if you pass zero as the day
			var dateRangeEnd = new Date;
			dateRangeEnd.setFullYear(workingYear, workingMonth + 1, 0);
		} else if (timeFrame == "YTD") {
			// Calculate the current date
			dateRangeEnd = new Date();
		} else if (timeFrame == "PreviousQuarter") {
			var endMonth = 0;
			var endDay = 0;

			// Calculate the end of the passed quarter
			if (workingMonth == 0) {
				endMonth = 2;		// March
				endDay = 31;		// Last day of March = 31
			} else if (workingMonth == 3) {
				EndMonth = 5;		// June
				EndDay = 30;		// Last day of March = 30
			} else if (workingMonth == 6) {
				endMonth = 8;		// September
				endDay = 30;		// Last day of March = 30
			} else {
				endMonth = 11;		// December
				endDay = 31;		// Last day of March = 31
			}
			dateRangeEnd = new Date(workingYear, endMonth, endDay);

		} else if (timeFrame == "PreviousYear") {
			var rangeEndYear = workingYear;	// Same year as start range
			var rangeEndMonth = 11; 		// Always December
			var rangeEndDay = 31; 		// Always last day of December
			dateRangeEnd = new Date(rangeEndYear, rangeEndMonth, rangeEndDay);

		} else {
			alert("calculateEndDate: Invalid Time Frame");
		}
		return dateRangeEnd;
	};



	return datePromptPresets;
});