function removeAfter(string, pattern) {
    var n = string.indexOf(pattern);
    return string.substring(0, n != -1 ? n : string.length);
}

function pageName(href) {
    if (href.indexOf(window.location.host) >= 0) {
        href = removeAfter(removeAfter(href, '?'), '#')
        hrefE = href.split('/')
        return hrefE[hrefE.length - 1]
    }
    return false
}

function updateScrollData() {
    history.state.scrollTop = $(document.body).scrollTop()
    history.replaceState(history.state)
}

function pageSpecific(location) {
    if (pageName(location) == 'contact') {
        initializeMap()
    }
    $(document).scroll(updateScrollData)
}



function actLink(ev) {
    var location = ev.currentTarget.href
    var page = pageName(location)
    if (page && page != pageName(window.location.href)) {
        loadDoc(location, function () {
            history.pushState({
                loc: location
            }, document.title, location)
        })
        return false
    }
}

function dynamiseLinks(el) {
    $("a", el).click(actLink)
}

function loadDoc(location, callback) {
    if (!callback) {
        callback = function () {
            return undefined
        }
    }
    var eventsLeft = 2
    var html = ''
    var mainContainer = $("#mainContainer")
    var oldHeight = mainContainer.height()

    function events() {
        eventsLeft += -1
        if (eventsLeft <= 0) {
            // In
            //  Calculations
            mainContainer.html(html)
            mainContainer.height('auto')
            newHeight = mainContainer.height()
            mainContainer.height(oldHeight)
            //  Transition
            mainContainer.animate({
                height: newHeight,
                opacity: 1,
            }, 'fast', function () {
                mainContainer.height('auto')
                dynamiseLinks(mainContainer)
                pageSpecific(location)
                callback()
            })
        }
    }
    // Out
    $(document).off('scroll', updateScrollData)
    $(document.body).animate({
        scrollTop: $('.navbar-lower').height()
    }, 'fast')
    $.get(location + '?c', function (data) {
        html = data
        events()
    })
    mainContainer.height(oldHeight)
    mainContainer.animate({
        opacity: 0
    }, 'fast', events)
}

function historyChange(ev) {
    loadDoc(ev.state.loc, function () {
        if (ev.state.scrollTop > $('.navbar-lower').height()) {
            $(document.body).animate({
                scrollTop: ev.state.scrollTop
            }, 'fast')
        }
    })
}

$(document).ready(function () {
    dynamiseLinks(document.body)
    var current = window.location.href
    pageSpecific(current)
    history.replaceState({
        loc: current
    }, document.title, current)
    window.onpopstate = historyChange
    $('.navbar-fixed-top .navbar-toggle').click(function () {
        $(document.body).animate({
            scrollTop: 0
        })
    })
})

function initializeMap() {
    var mapCanvas = document.getElementById('map-canvas');
    mapCanvas.innerHTML = ''
    var polytechPos = new google.maps.LatLng(50.6074998, 3.1373338);
    var mapOptions = {
        center: polytechPos,
        zoom: 16,
        mapTypeId: google.maps.MapTypeId.ROADMAP
    }
    var map = new google.maps.Map(mapCanvas, mapOptions)
    var marker = new google.maps.Marker({
        place: {
            location: polytechPos,
            query: "Polytech Lille"
        },
        attribution: {
            source: "Coupe de Robotique des Écoles Primaires",
            webUrl: window.location.host
        },
        map: map,
        title: "Polytech Lille"
    })
    var infowindow = new google.maps.InfoWindow({
        content: "<strong>Polytech Lille</strong><br/>Lieux des évènements de la Coupe de Robotique des Écoles Primaires"
    })
    marker.addListener('click', function () {
        infowindow.open(map, this)
    })
}