// requires jquery 1.7+

// JS s'execute: Retire l'avertissement 'Javascript est requis' (de fait, on sait que JS est actif...)
document.body.classList.remove("nojs");

//### Helpers handlebars personnalisés
Handlebars.registerHelper('lower', function (options) {
    return options.fn(this).toLowerCase();
});

Handlebars.registerHelper('repuri', function (find, replace, options) {
    return encodeURI(options.fn(this).replace(find, replace).toString());
});

Handlebars.registerHelper('todate', function (options) {
    var d = options.fn(this);
    var dt = new Date(Number.parseInt(d) * 1);
    return dt.toLocaleString();
});

Handlebars.registerHelper('timestamp', function (options) {
    return Number.parseInt(options.fn(this));
});

Handlebars.registerHelper('if_eq', function (a, opts) {
    var b = localStorage.hasOwnProperty("contact") ? localStorage.getItem("contact") : "";
    if (a === b) // Or === depending on your needs
        return opts.fn(this);
    else
        return opts.inverse(this);
});


//### Initialisation


// ************** CONFIGURATION *****************

// Nom et version de la base de données locale à créer/utiliser
var db_name = "ModelePWA"
var db_version = "3"

// Si deleteOnSuccess est vrai, les données synchronisées seront supprimées de la base locale.
var deleteOnSync = true;

// Les stores de la liste doNotSync ne seront pas synchronisés.
var doNotSync = ["params"];

var postUrl = "/api/modelepwa";

// **********************************************

var indexedDB = window.indexedDB || window.mozIndexedDB || window.webkitIndexedDB || window.msIndexedDB || window.shimIndexedDB;
var request;

// Installe le service worker
if ('serviceWorker' in navigator) {
    console.log("[ServiceWorker] Installe");
    navigator.serviceWorker.register('../sw.js');
}

var sectionId;
var section;
var objId;

var submitHandler;
var deleteHandler;
var editHandler;

// Charge la page en fonction de l'url actuelle
var load = function () {

    // Reinitialise l'affichage des sections
    $("#sync").hide();
    $("#main").empty();
    $("#main").show();

    // Parse l'url actuelle
    var base = window.location.hash.split('?')[0];
    sectionId = base.length > 0 ? base : "#index";
    section = $("body").find(sectionId);
    var qry = {};
    var qrystr = window.location.hash.split('?')[1];
    if (qrystr) {
        var definitions = qrystr.split('&');
        definitions.forEach(function (val, key) {
            var parts = val.split('=', 2);
            qry[parts[0]] = parts[1];
        });
    }

    // Met à jour le contenu de #main avec la section demandée dans l'url/

    // Si l'attribut 'model' existe pour cette section, charge les données depuis la localDb
    // et compile la section avec handlebars.
    if ($(section).attr("model")) {

        var model = $(section).attr("model");
        var template = Handlebars.compile(section.html());

        // Charge la base de données, et le stockage courant
        request = indexedDB.open(db_name, db_version);
        var db;
        var txs;
        var store;
        

        // Cree les stockages necessaires si ceux ci sont manquants
        request.onupgradeneeded = function () {
            var db = request.result;
            
            db.createObjectStore(model, { keyPath: "guid" });
            console.log("[DB] Cree '" + model + "'");
        };

        // Si l'accès a la db s'est bien passé:
        
        request.onsuccess = function () {
            var data;
            db = request.result;
            txs = db.transaction(model, "readonly");
            store = txs.objectStore(model);

            // Si un id specifique a été demandé, on charge specifiquement cet objet. 
            // Sinon: on les charge tous en memoire.
            if (qry["id"]) {
                store.get(qry["id"]).onsuccess = function (event) {
                    data = { data: event.target.result };
                    $("#main").html(template(data));

                    populateForm(data['data']);
                }
            }
            else {
                store.getAll().onsuccess = function (event) {
                    data = { data: event.target.result };
                    $("#main").html(template(data));
                };
            }
        };

        request.onerror = function () {
            console.log("Error while loading the db '" + model + "'");
            $("#main").html(template({}));
            return;
        };

        // (Re)définit la fonction d'interception de la soumission de formulaires
        submitHandler = function (event) {

            var form = $("#main").find("form")[0];

            // Stop the form from submitting since we’re handling that with AJAX.
            event.preventDefault();

            // Call our function to get the form data.
            var data = formToJSON(form.elements);

            data.guid = createGuid();
            txs = db.transaction(model, "readwrite");
            store = txs.objectStore(model);
            store.put(data);

        };

        // (Re)définit la fonction de suppression des lignes de l'index
        deleteHandler = function(event) {
            var del = $(this);
            if (confirm("Supprimer la selection?") == true) {

                $(del).prop("disabled", true);

                $(".ui-selected").each(function () {
                    var elt = $(this);
                    var id = $(elt).data("id");

                    txs = db.transaction(model, "readwrite");
                    store = txs.objectStore(model);
                    store.delete(id).onsuccess = function (evt) {
                        $(elt).remove();
                        $(".del").prop('disabled', false);
                    };
                });
            }
        };

        // (Re)définit la fonction de suppression d'edition
        editHandler = function(event) {
            var edit = $(this);
           
            var id = $(".ui-selected:first").data("id")

            txs = db.transaction(model, "readonly");
            store = txs.objectStore(model);
            var obj = store.get(id);

            obj.onsuccess = function (event) {
                window.location = "/#activites?id=" + id;
            };
        };

    }
    else {
        // Pas de modele, on charge simplement le html de la section.
        $("#main").html(section.html());
    }
}

load();

// Recharge dynamiquement le contenu HTML à chaque changement d'url
$(window).on('hashchange', function () {
    load();
});

// Met a jour le contenu des champs d'un formulaire
// Le binbding se fait via l'id du champs
var populateForm = function (data) {
    if ($("form").length) {
        $("input, select, textarea").each(function () {
            var input = $(this);
            var fieldName = input.attr('id');
            input.val(data[fieldName]);
        });
    }
}

// ###########################

// ### Interactions

// Intercepte la soumission de formulaires
$("#main").on("submit", "form", function (event) {
    submitHandler(event);
    window.location = "/#index";
});

// Gere le clic sur un bouton Supprimer
$("#main").on("click", ".del", function (event) {
    deleteHandler(event);
});

// Gere le clic sur un bouton Editer
$("#main").on("click", ".edit", function (event) {
    editHandler(event);
});

// Gere le clic sur le bouton de menu pour afficher ou masquer la sidebar
$('.bt-menu').on('click', 'svg', function () {
    $(this).closest('nav').find('div:not(:first)').toggleClass('sidebar');
});
$(document).on('click', '.sidebar', function () {
    $(this).closest('nav').find('div:not(:first)').toggleClass('sidebar');
});

// Affiche ou masque le bouton de sync selon que le poste est en ligne ou non
if (navigator.onLine) {
    $(".start-sync").removeAttr("disabled");
}
else {
    if (!$(".start-sync").is(":disabled"))
    {
        $(".start-sync").attr("disabled")
    }
}

// Affiche ou masque, et gere le clic sur le bouton de retour au haut de page.
window.onscroll = function (ev) {
    document.getElementById("back-top").className =(window.pageYOffset > 100) ? "": "hidden";
};
$('#back-top').on('click', function () {
    $('html, body').animate({ scrollTop: 0 }, 200);
});

// Rend les lignes des tables .selectable selectionnables
mo = new MutationObserver(function (mutations, observer) {
    $(".selectable > tbody").bind("mousedown", function (e) {
        e.metaKey = true;
    }).selectable({
        filter: "tr",
        stop: function () {
            $(".del").prop('disabled', ($(".ui-selected").length == 0));
            $(".edit").prop('disabled', ($(".ui-selected").length != 1));
        },
    });
})
mo.observe(document.querySelector('#main'), { childList: true });

// ### Synchronisation des données
$(".start-sync").on("click", function () {

    // (!) voir en debut de fichier pour la configuration de la synchro (cf. les variables doNotSync et deleteOnSync)

    // Affiche la page de synchro
    $("#main").hide();
    $("#sync").show();

    // Verifie l'acces à la LocalDb
    if (!request) {
        request = indexedDB.open(db_name, db_version);
        request.onerror = function () {
            console.log("Error while accessing the db");
            $("#sync").find(".status").html("<p>Erreur de synchronisation: impossible d'accéder à la base de données locale.</p>");
            return;
        };
    }

    var db = request.result;
    $("#sync").find(".status").html("<p>Synchronisation en cours, veuillez patienter...</p>");
    var model;

    // Parcourt les differents stores
    for (var i = 0; i < db.objectStoreNames.length; i++) {
        model = db.objectStoreNames[i];

        if (doNotSync.indexOf(model) >= 0) {
            console.log("Ignored: " + model);
            continue;
        }

        console.log("Sync: " + model);
        var txs = db.transaction(model, "readonly");
        var stores = txs.objectStore(model);

        stores.openCursor().onsuccess = function (event) {
            var cursor = event.target.result;
            if (cursor) {
                
                cursor.value.model = model;
                var id = cursor.value.guid;
                var posting = $.post(postUrl, { data: JSON.stringify(cursor.value) });

                // Put the results in a div
                posting.done(function (data) {
                    if (deleteOnSync & data) {
                        var tx = db.transaction(model, "readwrite");
                        var store = tx.objectStore(model);
                        store.delete(id).onsuccess = function (evt) {
                        };
                    }
                });
                cursor.continue();
            }
        };

        stores.openCursor().onerror = function (event) {
            console.log(event);
        }
    }

    console.log("Synchro ok");
    $("#sync").find(".end-sync").show();
    $("#sync").find(".status").html("<p>Synchronisation terminée.</p>");
});

$(".end-sync").click(function () {
    load();
});

//###### TOOLBOX  ######

function createGuid() {
    return ([1e7] + -1e3 + -4e3 + -8e3 + -1e11).replace(/[018]/g, c =>
        (c ^ crypto.getRandomValues(new Uint8Array(1))[0] & 15 >> c / 4).toString(16)
    )
}

function getLocation() {
    try {
        if (navigator.geolocation) {
            navigator.geolocation.getCurrentPosition(showPosition);
        } else {
            console.log("Geolocation is not supported by this browser.");
            return 0;
        }
    }
    catch (e) {
        console.log("Geolocation: error");
    }
}

function showPosition(position) {
    $("input[name='coordinates']").val(position.coords.latitude + "," + position.coords.longitude);
    console.log(position.coords);
}


// ### Serialization

/**
 * Checks that an element has a non-empty `name` and `value` property.
 * @param  {Element} element  the element to check
 * @return {Bool}             true if the element is an input, false if not
 */
var isValidElement = function isValidElement(element) {
    return element.name && element.value;
};

/**
 * Checks if an element’s value can be saved (e.g. not an unselected checkbox).
 * @param  {Element} element  the element to check
 * @return {Boolean}          true if the value should be added, false if not
 */
var isValidValue = function isValidValue(element) {
    return !['checkbox', 'radio'].includes(element.type) || element.checked;
};

/**
 * Checks if an input is a checkbox, because checkboxes allow multiple values.
 * @param  {Element} element  the element to check
 * @return {Boolean}          true if the element is a checkbox, false if not
 */
var isCheckbox = function isCheckbox(element) {
    return element.type === 'checkbox';
};


//var isHidden = function isHidden(element) {
//    return element.type === 'hidden';
//};

/**
 * Checks if an input is a `select` with the `multiple` attribute.
 * @param  {Element} element  the element to check
 * @return {Boolean}          true if the element is a multiselect, false if not
 */
var isMultiSelect = function isMultiSelect(element) {
    return element.options && element.multiple;
};

/**
 * Retrieves the selected options from a multi-select as an array.
 * @param  {HTMLOptionsCollection} options  the options for the select
 * @return {Array}                          an array of selected option values
 */
var getSelectValues = function getSelectValues(options) {
    return [].reduce.call(options, function (values, option) {
        return option.selected ? values.concat(option.value) : values;
    }, []);
};

/**
 * A more verbose implementation of `formToJSON()` to explain how it works.
 *
 * NOTE: This function is unused, and is only here for the purpose of explaining how
 * reducing form elements works.
 *
 * @param  {HTMLFormControlsCollection} elements  the form elements
 * @return {Object}                               form data as an object literal
 */
var formToJSON_deconstructed = function formToJSON_deconstructed(elements) {

    // This is the function that is called on each element of the array.
    var reducerFunction = function reducerFunction(data, element) {

        // Add the current field to the object.
        data[element.name] = element.value;

        // For the demo only: show each step in the reducer’s progress.
        console.log(JSON.stringify(data));

        return data;
    };

    // This is used as the initial value of `data` in `reducerFunction()`.
    var reducerInitialValue = {};

    // To help visualize what happens, log the inital value, which we know is `{}`.
    console.log('Initial `data` value:', JSON.stringify(reducerInitialValue));

    // Now we reduce by `call`-ing `Array.prototype.reduce()` on `elements`.
    var formData = [].reduce.call(elements, reducerFunction, reducerInitialValue);

    // The result is then returned for use elsewhere.
    return formData;
};

/**
 * Retrieves input data from a form and returns it as a JSON object.
 * @param  {HTMLFormControlsCollection} elements  the form elements
 * @return {Object}                               form data as an object literal
 */
var formToJSON = function formToJSON(elements) {
    return [].reduce.call(elements, function (data, element) {

        // Make sure the element has the required properties and should be added.
        if (isValidElement(element) && isValidValue(element)) {

            /*
             * Some fields allow for more than one value, so we need to check if this
             * is one of those fields and, if so, store the values as an array.
             */
            if (isCheckbox(element)) {
                data[element.name] = (data[element.name] || []).concat(element.value);
            } else if (isMultiSelect(element)) {
                data[element.name] = getSelectValues(element);
            } else {
                data[element.name] = element.value;
            }
        }

        return data;
    }, {});
};