var g_dateFormat = "d/m/Y";
var g_dateFormatJS = "DD/MM/YYYY";
var g_timezone = "Europe/London";

var g_GoogleMapCountries = JSON.parse("[\"fr\"]");

function isDate(sDate) {
    
    var regex = new RegExp("([0-9]{4}[-](0[1-9]|1[0-2])[-]([0-2]{1}[0-9]{1}|3[0-1]{1})|([0-2]{1}[0-9]{1}|3[0-1]{1})[-](0[1-9]|1[0-2])[-][0-9]{4})");
    
    try{
        
        if(regex.test(sDate))
            return true;
        
        return false;
    }
    catch(e){
        
        return false;
    }
    
    
}

function convertDateForDisplay(str_date, hasHours = false) {
    
    var dateFormat = "d/m/Y";

    // str_date in y-m-d => need to convert to dateFormat
    
    // get date and hours from str_date
    str_date = str_date.replace('T', ' ');
    str_date = str_date.replace('Z', '');
    var date = str_date.split(" ")[0];

    if(hasHours){

        var hours = str_date.split(" ")[1];
        var hours = hours.split(":")[0] + ":" + hours.split(":")[1];

    }

    // split date
    var strDateArray = date.split("-");
    
    // split dateFormat
    var dateFormatArray = dateFormat.split("/");
    var separator = "/";
    
    // if separator of dateFormat is not "/" test with "-"
    if(dateFormatArray.length < 2){ 
        dateFormatArray = dateFormat.split("-");
        separator = "-";
    }
    
    // get index of day / month / year
    var indexDay = dateFormatArray.indexOf("d");
    var indexMonth = dateFormatArray.indexOf("m");
    var indexYear = dateFormatArray.indexOf("Y");
    
    
    var dateToReturnArray = [];
    
    dateToReturnArray[indexDay] = strDateArray[2];
    dateToReturnArray[indexMonth] = strDateArray[1];
    dateToReturnArray[indexYear] = strDateArray[0];
    
    var dateToReturn = dateToReturnArray.join(separator);
                                   
    if(hasHours){
        dateToReturn = dateToReturn + " " + hours;
    }                         

    return dateToReturn;
}

function convertDateFromDisplay(str_date, hasHours = false) {
    
    // str_date in dateFormat => need to convert to y-m-d
    
    var dateFormat = "d/m/Y";
    
    // split dateFormat
    var dateFormatArray = dateFormat.split("/");
    var separator = "/";
    
    // if separator of dateFormat is not "/" test with "-"
    if(dateFormatArray.length < 2){
        dateFormatArray = dateFormat.split("-");
        separator = "-";
    }
    
    // get index of day / month / year
    var indexDay = dateFormatArray.indexOf("d");
    var indexMonth = dateFormatArray.indexOf("m");
    var indexYear = dateFormatArray.indexOf("Y");
    
    // split date
    var strDateArray = str_date.split(" ")[0].split(separator);
    
    var dateToReturnArray = [];
    
    dateToReturnArray[indexDay] = strDateArray[2];
    dateToReturnArray[indexMonth] = strDateArray[1];
    dateToReturnArray[indexYear] = strDateArray[0];
    
    var dateToReturn = dateToReturnArray.join("-");

    // Manage time format
    if ( hasHours ) {
        var timeToReturn = '00:00:00';
        if ( str_date.split(" ")[1] !== undefined ) {
            var strTimeArray = str_date.split(" ")[1].split(':');
            
            var timeToReturnArray = [];
            timeToReturnArray[0] = (strTimeArray[0] !== undefined && strTimeArray[0] !== '') ? strTimeArray[0] : '00';
            timeToReturnArray[1] = (strTimeArray[1] !== undefined && strTimeArray[1] !== '') ? strTimeArray[1] : '00';
            timeToReturnArray[2] = (strTimeArray[2] !== undefined && strTimeArray[2] !== '') ? strTimeArray[2] : '00';

            timeToReturn = timeToReturnArray.join(":");
        }
        dateToReturn += ' ' + timeToReturn;
    }

    return dateToReturn;
    
}
    

function getDateYMDFormat(date,fullDate = false ){
    
    var mm = date.getMonth() + 1; // getMonth() is zero-based
    var dd = date.getDate();
                                   
    if(fullDate == true){
        var hh = date.getHours();
        var ii = date.getMinutes();   
                                   
        var globalDate = [date.getFullYear(),
            (mm>9 ? '' : '0') + mm,
            (dd>9 ? '' : '0') + dd
        ].join('-');  
        
        var globalHours = [
            (hh>9 ? '' : '0') + hh,
            (ii>9 ? '' : '0') + ii
        ].join(':');
        
        return globalDate+' '+globalHours;
    }
                                   
    return [date.getFullYear(),
          (mm>9 ? '' : '0') + mm,
          (dd>9 ? '' : '0') + dd
         ].join('-');                               
                                   
                                   
}

function getLocalTime() {

    const now = new Date();
    const formatter = new Intl.DateTimeFormat('fr-FR', {
        hour: 'numeric',
        hour12: false,
        minute: 'numeric',
        day: 'numeric',
        month: 'numeric',
        year: 'numeric',
        timeZone: g_timezone,
    });
    return convertDateFromDisplay(formatter.format(now), true);
}

/**
 * add two times together
 * @doc https://gist.github.com/markhker/33868633a18d5bf3f8561aac5daf906f
 */
function addTimes (startTime, endTime) {
    var times = [ 0, 0, 0 ]
    var max = times.length

    var a = (startTime || '').split(':')
    var b = (endTime || '').split(':')

    // normalize time values
    for (var i = 0; i < max; i++) {
    a[i] = isNaN(parseInt(a[i])) ? 0 : parseInt(a[i])
    b[i] = isNaN(parseInt(b[i])) ? 0 : parseInt(b[i])
    }

    // store time values
    for (var i = 0; i < max; i++) {
    times[i] = a[i] + b[i]
    }

    var hours = times[0]
    var minutes = times[1]
    var seconds = times[2]

    if (seconds >= 60) {
    var m = (seconds / 60) << 0
    minutes += m
    seconds -= 60 * m
    }

    if (minutes >= 60) {
    var h = (minutes / 60) << 0
    hours += h
    minutes -= 60 * h
    }

    return ('0' + hours).slice(-2) + ':' + ('0' + minutes).slice(-2) + ':' + ('0' + seconds).slice(-2)
}

/**
 * Convert an integer to H:i
 * @example if 100 is given, will return "01:40"
 * @param int $minuteNumber
 * @return string
 */
function convertNumberOfMinuteToHour(minuteNumber) {
    const hours = Math.floor(minuteNumber / 60) < 10 ? "0" + Math.floor(minuteNumber / 60) : Math.floor(minuteNumber / 60);          
    const minutes = minuteNumber % 60 < 10 ? "0" + minuteNumber % 60 : minuteNumber % 60;
    return hours + ":" + minutes;
}

/**
 * Convert a time H:i:s to an int (number of minutes)
 * @param string time 
 * @return decimal
 */
function timeToNumber(time) {
    return moment.duration(time).asMinutes();
}

/**
* @param Date date
*/
function getNextMonth(date) {
    if (date.getMonth() == 11) {
        return new Date(date.getFullYear() + 1, 0, 1);
    } else {
        return new Date(date.getFullYear(), date.getMonth() + 1, 1);
    }
}

/**
* @param Date date
*/
function getPreviousMonth(date) {
    const copyDate = new Date(date);
    copyDate.setDate(0);
    const firstDayPreviousMonth = new Date(copyDate.setDate(1));

    return firstDayPreviousMonth;
}