// JavaScript Document

// Récupération de la langue
var URL = location.href;
var LANGUE = URL.substr(URL.length-2, 2);
var PAYS = new Array("fr","en","de","es","nl","it");
var COMPTEUR = 0;
for(i=0; i<PAYS.length; i++){
	if(PAYS[i]==LANGUE){
		COMPTEUR++;
		break;
	}
}
// 'fr' si introuvable
if (COMPTEUR == 0){
	LANGUE = "fr";
}
// convetir les dates des saisons en millisecondes depuis le 1/1/1970
function saison(date){
date = date.split("-");
date_start = date[0];
date_start = date_start.split("/");
date_start = date_start[1]+"/"+date_start[0]+"/"+date_start[2];
date_end = date[1];
date_end = date_end.split("/");
date_end = date_end[1]+"/"+date_end[0]+"/"+date_end[2];
date_start = new Date(date_start);
date_end = new Date(date_end);
date_start = Date.parse(date_start.toGMTString());
date_end = Date.parse(date_end.toGMTString());
return date_start+"-"+date_end;
}

// Convertit la date du format Anglais MM/JJ/AAAA au format Français JJ/MM/AAAA ou inversement
function date_invers(d){
d = d.split("/");
d = d[1]+"/"+d[0]+"/"+d[2];
return d;
}

// Set the initial date.
var ds_i_date = new Date();
ds_c_month = ds_i_date.getMonth() + 1;
ds_c_year = ds_i_date.getFullYear();

// Get Element By Id
function ds_getel(id) {
	return document.getElementById(id);
}

// Get the left and the top of the element.
function ds_getleft(el) {
	var tmp = el.offsetLeft;
	el = el.offsetParent
	while(el) {
		tmp += el.offsetLeft;
		el = el.offsetParent;
	}
	return tmp;
}
function ds_gettop(el) {
	var tmp = el.offsetTop;
	el = el.offsetParent
	while(el) {
		tmp += el.offsetTop;
		el = el.offsetParent;
	}
	return tmp;
}

// Output Element
var ds_oe = ds_getel('ds_calclass');
// Container
var ds_ce = ds_getel('ds_conclass');

// Output Buffering
var ds_ob = ''; 
function ds_ob_clean() {
	ds_ob = '';
}
function ds_ob_flush() {
	ds_oe.innerHTML = ds_ob;
	ds_ob_clean();
}
function ds_echo(t) {
	ds_ob += t;
}

var ds_element; // Eléments textuels en fonction de la langue

if (LANGUE == "fr") {
	var ds_monthnames = ["Janvier", "Février", "Mars", "Avril", "Mai", "Juin", "Juillet", "Aout", "Septembre", "Octobre", "Novembre", "Décembre"];
	var ds_daynames = ["Dim", "Lun", "Mar", "Mer", "Jeu", "Ven", "Sam"];
} else if (LANGUE == "en") {
	var ds_monthnames = ["January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"];
	var ds_daynames = ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"];
} else if (LANGUE == "de") {
	var ds_monthnames = ["Januar", "Februar", "März", "April", "Mai", "Juni", "Juli", "August", "September", "Oktober", "November", "Dezember"]; 
	var ds_daynames = ["Son", "Mon", "Die", "Mit", "Don", "Fre", "Sam"];
} else if (LANGUE == "es") {
	var ds_monthnames = ["Enero", "Febrero", "Marzo", "Abril", "Mayo", "Junio", "Julio", "Agosto", "Septiembre", "Octubre", "Noviembre", "Diciembre"];
	var ds_daynames = ["Dom", "Lun", "Mar", "Mié", "Jue", "Vie", "Sáb"];
} else if (LANGUE == "it") {
	var ds_monthnames = ["Gennaio", "Febbraio", "Marzo", "Aprile", "Maggio", "Giugno", "Luglio", "Agosto", "Settembre", "Ottobre", "Novembre", "Dicembre"]; 
	var ds_daynames = ["Dom", "Lun", "Mar", "Mer", "Gio", "Ven", "Sab"];
}

// Calendar template
function ds_template_main_above(t) {
			return '<table cellpadding="3" cellspacing="0" class="ds_tbl">'
	     + '<tr>'
		 + '<td class="ds_head"></td>'
		 + '<td class="ds_head" style="cursor: pointer" onclick="ds_pm();">&lt;</td>'
		 + '<td class="ds_head" style="cursor: pointer" onclick="ds_hi();" colspan="3">[Fermer]</td>'
		 + '<td class="ds_head" style="cursor: pointer" onclick="ds_nm();">&gt;</td>'
		 + '<td class="ds_head"></td>'
		 + '</tr>'
	     + '<tr>'
		 + '<td colspan="7" class="ds_head" style="cursor: default">' + t + '</td>'
		 + '</tr>'
		 + '<tr>';
}

function ds_template_day_row(t) {
	return '<td class="ds_subhead" style="cursor: default">' + t + '</td>';
}

function ds_template_new_week() {
	return '</tr><tr>';
}

function ds_template_blank_cell(colspan) {
	return '<td colspan="' + colspan + '"></td>'
}

function ds_template_day(d, m, y) {
	// déterminer à quel saison la case appartient
	jour = ds_i_date.getDate();
	mois = ds_i_date.getMonth() + 1;
	annee = ds_i_date.getFullYear();
	a = m + '/' + d + '/' + y;
	b = mois + '/' + jour + '/' + annee;
	a = new Date(a);
	b = new Date(b);
	a = Number(Date.parse(a.toGMTString()));
	b = Number(Date.parse(b.toGMTString()));
	if (a<b){
		return '<td class="ds_cell_old">&nbsp;' + d + '&nbsp;</td>';
	} else {
		return '<td class="ds_cell" onclick="ds_onclick(' + d + ',' + m + ',' + y + ')">' + d + '</td>';	
		
	}
}

function ds_template_main_below() {
	return '</tr></table>';
}

// This one draws calendar...
function ds_draw_calendar(m, y) {
	// First clean the output buffer.
	ds_ob_clean();
	// Here we go, do the header
	ds_echo (ds_template_main_above(ds_monthnames[m - 1] + ' ' + y));
	for (i = 0; i < 7; i ++) {
		ds_echo (ds_template_day_row(ds_daynames[i]));
	}
	// Make a date object.
	var ds_dc_date = new Date();
	ds_dc_date.setMonth(m - 1);
	ds_dc_date.setFullYear(y);
	ds_dc_date.setDate(1);
	
	if (m == 1 || m == 3 || m == 5 || m == 7 || m == 8 || m == 10 || m == 12) {
		days = 31;
	} else if (m == 4 || m == 6 || m == 9 || m == 11) {
		days = 30;
	} else {
		days = (y % 4 == 0) ? 29 : 28;
	}
	
	var first_day = ds_dc_date.getDay();
	var first_loop = 1;
	// Start the first week
	ds_echo (ds_template_new_week());
	// If sunday is not the first day of the month, make a blank cell...
	if (first_day != 0) {
		ds_echo (ds_template_blank_cell(first_day));
	}
	var j = first_day;
	for (i = 0; i < days; i ++) {
		// Today is sunday, make a new week.
		// If this sunday is the first day of the month,
		// we've made a new row for you already.
		if (j == 0 && !first_loop) {
			// New week!!
			ds_echo (ds_template_new_week());
		}
		// Make a row of that day!
		ds_echo (ds_template_day(i + 1, m, y));
		// This is not first loop anymore...
		first_loop = 0;
		// What is the next day?
		j ++;
		j %= 7;
	}
	// Do the footer
	ds_echo (ds_template_main_below());
	// And let's display..
	ds_ob_flush();
	// Scroll it into view.
	ds_ce.scrollIntoView();
}

// A function to show the calendar.
// When user click on the date, it will set the content of t.
function ds_sh(t) {
	// Set the element to set...
	ds_element = t;
	// Make a new date, and set the current month and year.
	if (t.value){
		var ds_sh_date = new Date(date_invers(t.value));
	} else {
		var ds_sh_date = new Date();
	}
	ds_c_month = ds_sh_date.getMonth() + 1;
	ds_c_year = ds_sh_date.getFullYear();
	// Draw the calendar
	ds_draw_calendar(ds_c_month, ds_c_year);
	// To change the position properly, we must show it first.
	ds_ce.style.display = '';
	// Move the calendar container!
	the_left = ds_getleft(t);
	the_top = ds_gettop(t) + t.offsetHeight;
	ds_ce.style.left = the_left + 'px';
	ds_ce.style.top = the_top + 'px';
	// Scroll it into view.
	ds_ce.scrollIntoView();
}

// Hide the calendar.
function ds_hi() {
	ds_ce.style.display = 'none';
}

// Moves to the next month...
function ds_nm() {
	// Increase the current month.
	ds_c_month ++;
	// We have passed December, let's go to the next year.
	// Increase the current year, and set the current month to January.
	if (ds_c_month > 12) {
		ds_c_month = 1; 
		ds_c_year++;
	}
	// Redraw the calendar.
	ds_draw_calendar(ds_c_month, ds_c_year);
}

// Moves to the previous month...
function ds_pm() {
	ds_c_month = ds_c_month - 1; // Can't use dash-dash here, it will make the page invalid.
	// We have passed January, let's go back to the previous year.
	// Decrease the current year, and set the current month to December.
	if (ds_c_month < 1) {
		ds_c_month = 12; 
		ds_c_year = ds_c_year - 1; // Can't use dash-dash here, it will make the page invalid.
	}
	// Redraw the calendar.
	ds_draw_calendar(ds_c_month, ds_c_year);
}

// Moves to the next year...
function ds_ny() {
	// Increase the current year.
	ds_c_year++;
	// Redraw the calendar.
	ds_draw_calendar(ds_c_month, ds_c_year);
}

// Moves to the previous year...
function ds_py() {
	// Decrease the current year.
	ds_c_year = ds_c_year - 1; // Can't use dash-dash here, it will make the page invalid.
	// Redraw the calendar.
	ds_draw_calendar(ds_c_month, ds_c_year);
}

// Format the date to output.
function ds_format_date(d, m, y) {
	// 2 digits month.
	m2 = '00' + m;
	m2 = m2.substr(m2.length - 2);
	// 2 digits day.
	d2 = '00' + d;
	d2 = d2.substr(d2.length - 2);
	// DD/MM/YYYY
	return d2 + '/' + m2 + '/' + y;
}

// When the user clicks the day.
function ds_onclick(d, m, y) {
	// Hide the calendar.
	ds_hi();
	// Set the value of it, if we can.
	if (typeof(ds_element.value) != 'undefined') {
		ds_element.value = ds_format_date(d, m, y);
	// Maybe we want to set the HTML in it.
	} else if (typeof(ds_element.innerHTML) != 'undefined') {
		ds_element.innerHTML = ds_format_date(d, m, y);
	// I don't know how should we display it, just alert it to user.
	} else {
		alert (ds_format_date(d, m, y));
	}
}