var map;
var slider;

var gData = {};
var gLoadedFiles = 0;
var gInitCircleTimer;
var gInitCircleIdx;
var gInitComplete = false;
var gMarkerIcons = {};

var gUserDict = {};
var gFsaDict = {};

var kMarkers = {	yellow:'yellow-dot.gif', green:'green-dot.gif', red:'red-dot.gif'	};
var kDataSchemas = {
	votes: ['id','time','vote'],
	fsa: ['fsa', 'lng', 'lat'],
	utilisateurs: ['id', 'fsa']
	};
//	politiciens: ['start', 'end', 'name'],
var gNmbLoadedFiles = 3;

var kSliderWidth = 360;
var kSliderTickSize = 5;
var kStartTime;
var kEndTime;
var kTickSpan;

function load()
{
	if(!GBrowserIsCompatible())
		return;

	window.onresize = onResizeHandler;
	onResizeHandler();

	loadData();
	initSlider();

	map = new GMap2(document.getElementById("map"));
	map.setCenter(new GLatLng(47.2419, -72.1419), 7);
	map.addControl(new GLargeMapControl());
	
	var checkOnDataLoad = setInterval(function()
	{
		if(gLoadedFiles == gNmbLoadedFiles)
		{
			onDataLoad();
			clearInterval(checkOnDataLoad);
		}
	}, 200);
	
	var checkOnInitEnd = setInterval(function()
	{
		if(gInitComplete)
		{
			clearInterval(checkOnInitEnd);

			$('#initStatusDiv').css({display: 'none'});
			
			onSliderMove();
			onSliderEnd();
		}
	}, 200);
}

function onResizeHandler()
{
	var mapCenter = $('#map').offset().left + parseInt($('#map').css('width')) / 2;
	var movePanelTo = mapCenter - parseInt($('#sliderPanelDiv').css('width')) / 2;

	$('#sliderPanelDiv').css({left: movePanelTo + "px"});
	
	var moveInitPanelTo = mapCenter - parseInt($('#initStatusDiv').css('width')) / 2;
	$('#initStatusDiv').css({left: moveInitPanelTo + "px"});
}

function onSliderMove()
{
	if(!gInitComplete)
		return;
	
	var sliderValue = 0 | slider.getValue();
	
	var sliderHintLeft = $('#slider-bg').offset().left;
	$('#sliderHint').css({left: sliderValue + sliderHintLeft + 'px', display: 'block'});

	var thumbDate;
	if(sliderValue != 0)
	{
		var sliderFraction = sliderValue / kSliderWidth;
		thumbDate = new Date(kStartTime + (kEndTime - kStartTime) * sliderFraction);
	}
	else
		thumbDate = new Date(kStartTime);

	$('#sliderHint').html(strPadL(thumbDate.getHours(), '0', 2) + ":" + strPadL(thumbDate.getMinutes(), '0', 2));
	
	
	var dataStartTime = thumbDate.getTime() - kTickSpan;
	if(dataStartTime < kStartTime)
		dataStartTime = kStartTime;
	
	var dataEndTime = thumbDate.getTime() + kTickSpan;
	if(dataEndTime > kEndTime)
		dataEndTime = kEndTime;	
		
	var fsaVotes = {};

	for(var voteIdx = 0; voteIdx < gData.votes.length; voteIdx++)
	{
		// exclude other votes in time (this helps to make the map faster)
		if(gData.votes[voteIdx].time < dataStartTime || gData.votes[voteIdx].time > dataEndTime)
			continue;
	
		var voteObj = gData.votes[voteIdx];
		var userObj = gUserDict[voteObj.id];

		// some fsa haven't been geocoded
		if(!gFsaDict[userObj.fsa])
			continue;

		var fsaObj = gFsaDict[userObj.fsa];
		var fsaObjKey = fsaObj.fsa;
		
		if(!fsaVotes[fsaObjKey])
			fsaVotes[fsaObjKey] = {score: 0, high: 0, total: 0};
		
		switch(gData.votes[voteIdx].vote)
		{
			case '1':		fsaVotes[fsaObjKey].score++;	break;
			case '2':	fsaVotes[fsaObjKey].score--;	break;
			case '3':	fsaVotes[fsaObjKey].high++;		break;
		}
		
		fsaVotes[fsaObjKey].total++;
	}
	
	// hide fsas with no votes
	
	for(var fsaIdx = 0; fsaIdx < gData.fsa.length; fsaIdx++)
	{
		if(!fsaVotes[gData.fsa[fsaIdx].fsa])
		{
			gData.fsa[fsaIdx].gmarker.hide();
		}
	}
	
	for(var currVoteFsa in fsaVotes)
	{
		// **********************
		// do something better with color gradients and use fsaVotes[idx].total and the score
		// **********************
		
		// more than 25% exclamations
		if(fsaVotes[currVoteFsa].high != 0 && fsaVotes[currVoteFsa].high > fsaVotes[currVoteFsa].total / 4)
		{
			gFsaDict[currVoteFsa].gmarker.setImage('img/' + kMarkers.yellow);
		}
		else if(fsaVotes[currVoteFsa].score > 0)
		{
			gFsaDict[currVoteFsa].gmarker.setImage('img/' + kMarkers.green);
		}
		else
		{
			gFsaDict[currVoteFsa].gmarker.setImage('img/' + kMarkers.red);
		}

		gFsaDict[currVoteFsa].gmarker.show();
	}

}

function onSliderStart()
{
	$('#sliderHint').css({display: 'block'});
}

function onSliderEnd()
{
	$('#sliderHint').css({display: 'none'});
}

function initSlider()
{
    var Event = YAHOO.util.Event,
        Dom   = YAHOO.util.Dom,
        lang  = YAHOO.lang,
        bg="slider-bg", thumb="slider-thumb", 
        valuearea="slider-value", textfield="slider-converted-value";

    var topConstraint = 0;

    Event.onDOMReady(function()
    {
        slider = YAHOO.widget.Slider.getHorizSlider(bg, 
                         thumb, topConstraint, kSliderWidth, kSliderTickSize);

        slider.subscribe("slideStart", onSliderStart);
        slider.subscribe("slideEnd", onSliderEnd);

        slider.subscribe("change", onSliderMove);
	});
}

function initSliderCaptions()
{
	var startDateObj = new Date(kStartTime);
	$('#startTimeDiv').html(startDateObj.getHours() +":"+ strPadL(startDateObj.getMinutes(), '0', 2));

	var endDateObj = new Date(kEndTime);
	$('#endTimeDiv').html(endDateObj.getHours() +":"+ strPadL(endDateObj.getMinutes(), '0', 2));
}

function initVoteTimestamps()
{
	for(var i = 0; i < gData.votes.length; i++)
	{
		var timeObjMatches = /^([0-9]{4})-([0-9]{2})-([0-9]{2}) ([0-9]{2}):([0-9]{2}):([0-9]{2})$/.exec(gData.votes[i].time);
		
		if(!timeObjMatches)
			continue;
		
		var timeObjDate = new Date(timeObjMatches[1], timeObjMatches[2], timeObjMatches[3], timeObjMatches[4], timeObjMatches[5], timeObjMatches[6]);
		
		gData.votes[i].time = timeObjDate.getTime();
	}
}

function initTimeConstants()
{	
	kStartTime = gData.votes[0].time;
	kEndTime = gData.votes[gData.votes.length - 1].time;
	
	kTickSpan = (kEndTime - kStartTime) * (kSliderTickSize / kSliderWidth);
}

function initDicts()
{
	for(var i = 0; i < gData.fsa.length; i++)
		gFsaDict[gData.fsa[i].fsa] = gData.fsa[i];

	for(var i = 0; i < gData.utilisateurs.length; i++)
		gUserDict[gData.utilisateurs[i].id] = gData.utilisateurs[i];
}

function initUserFsaAllCaps()
{
	for(var i = 0; i < gData.utilisateurs.length; i++)
	{
		if(!gData.utilisateurs[i].fsa)
			continue;
		
		gData.utilisateurs[i].fsa = gData.utilisateurs[i].fsa.toUpperCase();
	}
}

function onDataLoad()
{
	initUserFsaAllCaps();
	initDicts();
	initFsaLatLng();
	initVoteTimestamps();
	initTimeConstants();
	initSliderCaptions();

	initMarkerIcons();
	
	// last - sets ginitcomplete
	initCircles();
}

function initMarkerIcons()
{
	var baseIcon = new GIcon();
	baseIcon.shadow = "";
	baseIcon.iconSize = new GSize(16, 16);
	baseIcon.shadowSize = new GSize(1, 1);
	baseIcon.iconAnchor = new GPoint(8, 8);
	baseIcon.infoWindowAnchor = new GPoint(1, 1);

	for(var currMarker in kMarkers)
	{
		var currIcon = new GIcon(baseIcon);
		currIcon.image = "img/" + kMarkers[currMarker];
	
		gMarkerIcons[currMarker] = currIcon;
	}
}

function initCircles()
{
	gInitCircleIdx =  0;
	
	gInitCircleTimer = setInterval(initCircleOnInterval, 70);
}

function initCircleOnInterval()
{
	gData.fsa[gInitCircleIdx].gmarker = new GMarker(gData.fsa[gInitCircleIdx].gpoint, {clickable: false, icon: gMarkerIcons.red});
	map.addOverlay(gData.fsa[gInitCircleIdx].gmarker);
	gData.fsa[gInitCircleIdx].gmarker.hide();

	if(++gInitCircleIdx == gData.fsa.length)
	{
		gInitComplete = true;
		clearInterval(gInitCircleTimer);
	}
}

function initFsaLatLng()
{
	for(var i = 0; i < gData.fsa.length; i++)
		gData.fsa[i].gpoint = new GLatLng(gData.fsa[i].lat, gData.fsa[i].lng);
}

function loadData()
{
//	ajaxReqCsvToObj('politiciens');
	ajaxReqCsvToObj('utilisateurs');
	ajaxReqCsvToObj('votes');
	ajaxReqCsvToObj('fsa', true);
}

function ajaxReqCsvToObj(file, dontSkipHeaders)
{
	$.ajax({
		type:'GET',
		url:'data/' + file + '.csv',
		success: function(data)
		{
			if(data)
			{
				data = data.split("\n");

				if(data.length < 3)
					return;
				
				gData[file] = [];
				
				for(var lineIdx = 0; lineIdx < data.length; lineIdx++)
				{
					if(!dontSkipHeaders && lineIdx == 0)
						continue;
				
					var lineData = data[lineIdx].split(';');
					var lineDataObj = {};
					
					for(var lineDataIdx = 0; lineDataIdx < lineData.length; lineDataIdx++)
						lineDataObj[kDataSchemas[file][lineDataIdx]] = lineData[lineDataIdx];
					
					gData[file].push(lineDataObj);
				}
				
				gLoadedFiles++;
			}
		}
	});
}

function strPadL(str, padStr, length)
{
	str = "" + str;
	padStr = "" + padStr;

	for(var i = length - str.length; i > 0; i--)
		str = padStr + str;

	return str;
}