/*
* jQuery timepicker addon
* By: Trent Richardson [http://trentrichardson.com]
* Version 0.5
* Last Modified: 6/16/2010
* 
* Copyright 2010 Trent Richardson
* Dual licensed under the MIT and GPL licenses.
* http://trentrichardson.com/Impromptu/GPL-LICENSE.txt
* http://trentrichardson.com/Impromptu/MIT-LICENSE.txt
* 
* HERES THE CSS:
* #ui-timepicker-div dl{ text-align: left; }
* #ui-timepicker-div dl dt{ height: 25px; }
* #ui-timepicker-div dl dd{ margin: -25px 0 10px 65px; }
*/
(function($) {
    function Timepicker() { }

    Timepicker.prototype = {
        $input: null,
        $timeObj: null,
        inst: null,
        hour_slider: null,
        minute_slider: null,
        second_slider: null,
        hour: 0,
        minute: 0,
        second: 0,
        ampm: '',
        formattedDate: '',
        formattedTime: '',
        formattedDateTime: '',
        defaults: {
            holdDatepickerOpen: true,
            showButtonPanel: true,
            timeOnly: false,
            showHour: true,
            showMinute: true,
            showSecond: false,
            showTime: true,
            //----------------------------
            stepHour: .05,
            stepMinute: .05,
            stepSecond: .05,
            ampm: false,
            hour: 0,
            minute: 0,
            second: 0,
            timeFormat: 'hh:mm tt',
            alwaysSetTime: true
            //----------------------------
        },

        //########################################################################
        // add our sliders to the calendar
        //########################################################################
        addTimePicker: function(dp_inst) {
            var tp_inst = this;
            var currDT = this.$input.val();
            var regstr = this.defaults.timeFormat.toString()
							.replace(/h{1,2}/ig, '(\\d?\\d)')
							.replace(/m{1,2}/ig, '(\\d?\\d)')
							.replace(/s{1,2}/ig, '(\\d?\\d)')
							.replace(/t{1,2}/ig, '(am|pm|a|p)?')
							.replace(/\s/g, '\\s?') + '$';

            if (!this.defaults.timeOnly) {
                //the time should come after x number of characters and a space.  x = at least the length of text specified by the date format
                regstr = '\\S{' + this.defaults.timeFormat.length + ',}\\s+' + regstr;
            }
            //--------------------------------------

            var order = this.getFormatPositions();
            var treg = currDT.match(new RegExp(regstr, 'i'));

            if (treg) {
                if (order.t !== -1)
                    this.ampm = ((treg[order.t] == undefined || treg[order.t].length == 0) ? '' : (treg[order.t].charAt(0).toUpperCase() == 'A') ? 'AM' : 'PM').toUpperCase();

                if (order.h !== -1) {
                    if (this.ampm == 'AM' && treg[order.h] == '12')
                        this.hour = 0; // 12am = 0 hour
                    else if (this.ampm == 'PM' && treg[order.h] != '12')
                        this.hour = (parseFloat(treg[order.h]) + 12).toFixed(0); //12pm = 12 hour, any other pm = hour + 12
                    else
                        this.hour = treg[order.h];
                }

                if (order.m !== -1)
                    this.minute = treg[order.m];

                if (order.s !== -1)
                    this.second = treg[order.s];
            }

            tp_inst.timeDefined = (treg) ? true : false;
            //---------------------

            // wait for datepicker to create itself.. 60% of the time it works every time..
            setTimeout(function() {
                tp_inst.injectTimePicker(dp_inst, tp_inst);
            }, 10);

        },

        //########################################################################
        // figure out position of time elements.. cause js cant do named captures
        //########################################################################
        getFormatPositions: function() {
            var finds = this.defaults.timeFormat.toLowerCase().match(/(h{1,2}|m{1,2}|s{1,2}|t{1,2})/g);
            var orders = { h: -1, m: -1, s: -1, t: -1 };

            if (finds) {
                for (var i = 0; i < finds.length; i++) {
                    if (orders[finds[i].toString().charAt(0)] == -1)
                        orders[finds[i].toString().charAt(0)] = i + 1;
                }
            }

            return orders;
        },

        //########################################################################
        // generate and inject html for timepicker into ui datepicker
        //########################################################################
        injectTimePicker: function(dp_inst, tp_inst) {
            var $dp = $('#' + $.datepicker._mainDivId);
            
            /* 
             * Added by Peter Medeiros 
             * - Figure out what the minute max should be based on the step minute value.  
             * - Get Remainder of 59 / Step Minute and subtract from 59 (59 being total minutes in an hour)
             */
            var hourMax = 23 - (23 % tp_inst.defaults.stepHour);
            var minMax = 59 - (59 % tp_inst.defaults.stepMinute);
            var secMax = 59 - (59 % tp_inst.defaults.stepSecond);
            
            /* End Added by Peter Medeiros */
            
            // Prevent displaying twice
            if ($dp.find("div#ui-timepicker-div").length == 0) {
                var html = '<div id="ui-timepicker-div">' +
						'<dl>' +
						    '<dt id="ui_tpicker_time_label"' + ((tp_inst.defaults.showTime) ? '' : ' style="display:none;"') + '>Time</dt>' +
							'<dd id="ui_tpicker_time"' + ((tp_inst.defaults.showTime) ? '' : ' style="display:none;"') + '></dd>' +
							'<dt id="ui_tpicker_hour_label"' + ((tp_inst.defaults.showHour) ? '' : ' style="display:none;"') + '>Hour</dt>' +
							'<dd id="ui_tpicker_hour"' + ((tp_inst.defaults.showHour) ? '' : ' style="display:none;"') + '></dd>' +
							'<dt id="ui_tpicker_minute_label"' + ((tp_inst.defaults.showMinute) ? '' : ' style="display:none;"') + '>Minute</dt>' +
							'<dd id="ui_tpicker_minute"' + ((tp_inst.defaults.showMinute) ? '' : ' style="display:none;"') + '></dd>' +
							'<dt id="ui_tpicker_second_label"' + ((tp_inst.defaults.showSecond) ? '' : ' style="display:none;"') + '>Second</dt>' +
							'<dd id="ui_tpicker_second"' + ((tp_inst.defaults.showSecond) ? '' : ' style="display:none;"') + '></dd>' +
						'</dl>' +
					'</div>';

                $tp = $(html);

                if (tp_inst.defaults.timeOnly == true) { // if we only want time picker
                    $tp.prepend('<div class="ui-widget-header ui-helper-clearfix ui-corner-all"><div class="ui-datepicker-title">Choose Time</div></div>');
                    $dp.find('.ui-datepicker-header, .ui-datepicker-calendar, .ui-datepicker-current').hide();
                }

                tp_inst.hour_slider = $tp.find('#ui_tpicker_hour').slider({ orientation: "horizontal", value: tp_inst.hour, min:0, max: hourMax, step: tp_inst.defaults.stepHour, slide: function(event, ui) { 
                		tp_inst.hour_slider.slider( "option", "value", ui.value );
                		tp_inst.onTimeChange(dp_inst, tp_inst); 
                	} });
                /* 
                 * Updated by Peter Medeiros 
                 * - Pass in Event and UI instance into slide function
                 */
                tp_inst.minute_slider = $tp.find('#ui_tpicker_minute').slider({ orientation: "horizontal", value: tp_inst.minute, min:0, max: minMax, step: tp_inst.defaults.stepMinute, slide: function(event, ui) { 
                		tp_inst.minute_slider.slider( "option", "value", ui.value ); // update the global minute slider instance value with the current slider value
                		tp_inst.onTimeChange(dp_inst, tp_inst); 
                	} });
                tp_inst.second_slider = $tp.find('#ui_tpicker_second').slider({ orientation: "horizontal", value: tp_inst.second, min:0, max: secMax, step: tp_inst.defaults.stepSecond, slide: function(event, ui) { 
                		tp_inst.second_slider.slider( "option", "value", ui.value );
                		tp_inst.onTimeChange(dp_inst, tp_inst); 
                	} });

                $dp.find('.ui-datepicker-calendar').after($tp);
                tp_inst.$timeObj = $('#ui_tpicker_time');

                if (dp_inst != null) {
                  
                    var timeDefined = tp_inst.timeDefined;

                    tp_inst.onTimeChange(dp_inst, tp_inst);
                    tp_inst.timeDefined = timeDefined;

                }
            }
        },

        //########################################################################
        // when a slider moves..
        // on time change is also called when the time is updated in the text field
        //########################################################################
        onTimeChange: function(dp_inst, tp_inst) {
            var hour = tp_inst.hour_slider.slider('value');
            var minute = tp_inst.minute_slider.slider('value');
            var second = tp_inst.second_slider.slider('value');
            var ampm = (tp_inst.hour < 12) ? 'AM' : 'PM';

            var hasChanged = false;

            // if the update was done in the input field, this field should not be updated
            // if the update was done using the sliders, update the input field
            if (tp_inst.hour != hour || tp_inst.minute != minute || tp_inst.second != second || (tp_inst.ampm.length > 0 && tp_inst.ampm != ampm))
                hasChanged = true;

            tp_inst.hour = parseFloat(hour).toFixed(0);
            tp_inst.minute = parseFloat(minute).toFixed(0);
            tp_inst.second = parseFloat(second).toFixed(0);
            tp_inst.ampm = ampm;

            tp_inst.formatTime(tp_inst);

            tp_inst.$timeObj.text(tp_inst.formattedTime);

            if (hasChanged) {
                tp_inst.updateDateTime(dp_inst, tp_inst);
                tp_inst.timeDefined = true;
            }
        },

        //########################################################################
        // format the time all pretty...
        //########################################################################
        formatTime: function(inst) {
            var tmptime = inst.defaults.timeFormat.toString();
            var hour12 = ((inst.ampm == 'AM') ? (inst.hour) : (inst.hour % 12));
            hour12 = (hour12 == 0) ? 12 : hour12;

            if (inst.defaults.ampm == true) {
                tmptime = tmptime.toString()
					.replace(/hh/g, ((hour12 < 10) ? '0' : '') + hour12)
					.replace(/h/g, hour12)
					.replace(/mm/g, ((inst.minute < 10) ? '0' : '') + inst.minute)
					.replace(/m/g, inst.minute)
					.replace(/ss/g, ((inst.second < 10) ? '0' : '') + inst.second)
					.replace(/s/g, inst.second)
					.replace(/TT/g, inst.ampm.toUpperCase())
					.replace(/tt/g, inst.ampm.toLowerCase())
					.replace(/T/g, inst.ampm.charAt(0).toUpperCase())
					.replace(/t/g, inst.ampm.charAt(0).toLowerCase());
            }
            else {
                tmptime = tmptime.toString()
					.replace(/hh/g, ((inst.hour < 10) ? '0' : '') + inst.hour)
					.replace(/h/g, inst.hour)
					.replace(/mm/g, ((inst.minute < 10) ? '0' : '') + inst.minute)
					.replace(/m/g, inst.minute)
					.replace(/ss/g, ((inst.second < 10) ? '0' : '') + inst.second)
					.replace(/s/g, inst.second);
                tmptime = $.trim(tmptime.replace(/t/gi, ''));
            }

            inst.formattedTime = tmptime;
            return inst.formattedTime;
        },

        //########################################################################
        // update our input with the new date time..
        //########################################################################
        updateDateTime: function(dp_inst, tp_inst) {
            var dt = this.$input.datepicker('getDate');

            if (dt == null)
                this.formattedDate = $.datepicker.formatDate($.datepicker._get(dp_inst, 'dateFormat'), new Date(), $.datepicker._getFormatConfig(dp_inst));
            else this.formattedDate = $.datepicker.formatDate($.datepicker._get(dp_inst, 'dateFormat'), dt, $.datepicker._getFormatConfig(dp_inst));

            if (this.defaults.alwaysSetTime) {
                this.formattedDateTime = this.formattedDate + ' ' + this.formattedTime;
            }
            else {
                if (dt == null || !tp_inst.timeDefined || tp_inst.timeDefined == false) {
                    this.formattedDateTime = this.formattedDate;
                }
                else {
                    this.formattedDateTime = this.formattedDate + ' ' + this.formattedTime;
                }
            }
            //-----------------------------

            if (this.defaults.timeOnly == true)
                this.$input.val(this.formattedTime);
            else this.$input.val(this.formattedDateTime);
        }
    };

    //########################################################################
    // extend timepicker to datepicker
    //########################################################################		
    jQuery.fn.datetimepicker = function(o) {
        var tp = new Timepicker();

        if (o == undefined)
            o = {};

        tp.defaults = $.extend({}, tp.defaults, o);

        tp.defaults = $.extend({}, tp.defaults, {
            beforeShow: function(input, inst) {
                tp.hour = tp.defaults.hour;
                tp.minute = tp.defaults.minute;
                tp.second = tp.defaults.second;
                tp.ampm = '';
                tp.$input = $(input);
                tp.inst = inst;

                tp.addTimePicker(inst);

                if ($.isFunction(o['beforeShow'])) o.beforeShow(input, inst);
            },
            onChangeMonthYear: function(year, month, inst) {
                
                // Update the time as well : this prevents the time from disappearing from the input field.
                tp.updateDateTime(inst, tp);

                if ($.isFunction(o['onChangeMonthYear'])) o.onChangeMonthYear(year, month, inst);
            },
            onClose: function(dateText, inst) {
                tp.updateDateTime(inst, tp);

                if ($.isFunction(o['onClose'])) o.onClose(dateText, inst);
            }
        });

        $(this).datepicker(tp.defaults);
    };

    //########################################################################
    // shorthand just to use timepicker..
    //########################################################################
    jQuery.fn.timepicker = function(o) {
        o = $.extend(o, { timeOnly: true });

        $(this).datetimepicker(o);
    };

    //########################################################################
    // the bad hack :/ override datepicker so it doesnt close on select
    //########################################################################
    $.datepicker._selectDate = function(id, dateStr) {
        var target = $(id);
        var inst = this._getInst(target[0]);
        var holdDatepickerOpen = (this._get(inst, 'holdDatepickerOpen') === true) ? true : false; // this line for timepicker..
        dateStr = (dateStr != null ? dateStr : this._formatDate(inst));

        if (inst.input)
            inst.input.val(dateStr);
        this._updateAlternate(inst);
        var onSelect = this._get(inst, 'onSelect');
        if (onSelect)
            onSelect.apply((inst.input ? inst.input[0] : null), [dateStr, inst]);  // trigger custom callback
        else if (inst.input)
            inst.input.trigger('change'); // fire the change event
        if (inst.inline)
            this._updateDatepicker(inst);
        else if (holdDatepickerOpen) { } // this line for timepicker..
        else {
            this._hideDatepicker();
            this._lastInput = inst.input[0];
            if (typeof (inst.input[0]) != 'object')
                inst.input.focus(); // restore focus
            this._lastInput = null;
        }

        this._notifyChange(inst);
    };

    //Change 4 - reduction of code required for override for _updateDatepicker function 
    $.datepicker._base_updateDatepicker = $.datepicker._updateDatepicker;
    //#############################################################################################
    // second bad hack :/ override datepicker so it triggers an event when changing the input field
    //#############################################################################################
    /* Generate the date picker content. */
    $.datepicker._updateDatepicker = function(inst) {
        this._base_updateDatepicker(inst);
        // Reload the time control when changing something in the input text field.
        this._beforeShow(inst.input, inst);
    };

    $.datepicker._beforeShow = function(input, inst) {
        var beforeShow = this._get(inst, 'beforeShow');
        if (beforeShow)
            beforeShow.apply((inst.input ? inst.input[0] : null), [inst.input, inst]);
    };
    //End Change 4 --------------------------------------------------------------------

    //#######################################################################################
    // third bad hack :/ override datepicker so it allows spaces and colan in the input field
    //#######################################################################################
    $.datepicker._doKeyPress = function(event) {
        var inst = $.datepicker._getInst(event.target);
        if ($.datepicker._get(inst, 'constrainInput')) {
            var dateChars = $.datepicker._possibleChars($.datepicker._get(inst, 'dateFormat'));
            var chr = String.fromCharCode(event.charCode == undefined ? event.keyCode : event.charCode);
            // keyCode == 58 => ":"
            // keyCode == 32 => " "
            return event.ctrlKey || (chr < ' ' || !dateChars || dateChars.indexOf(chr) > -1 || event.keyCode == 58 || event.keyCode == 32);
        }
    };

})(jQuery);