/*
 * @file Manages all advanced search form logic.
 */

var searchGroups = $("div#search-groups");

/*
 * Load all advanced search form libraries.
 */
(function loadInputFieldWidgets(){
    $(".search-group input#date-last-modified").datepicker();
    $(".search-group input#date-created").datepicker();

    var languages = new Bloodhound({
        datumTokenizer: Bloodhound.tokenizers.obj.whitespace("value"),
        queryTokenizer: Bloodhound.tokenizers.whitespace,
        local: $.map(TYPEAHEAD_LANGUAGES, function(state){
            return {value : state};
        })
    });

    languages.initialize();
    $("#language.typeahead").typeahead({
            hint: true,
            highlight: true,
            minLength: 1
        },
        {
            name: "languages",
            displayKey: "value",
            source: languages.ttAdapter()
    });
}());

/*
 * Set all advanced search form button callbacks.
 */
(function setSearchFormCallbacks(){
    // Create a new search group, and update the `#sidebar` checklist accordingly.
    $("button#add-group").click(function(){
        $("div#sidebar input[type=checkbox]").prop("checked", false);

        searchGroups.children("#selected").removeAttr("id");
        var searchGroup = $("<div/>", {class : "search-group", id : "selected"});
        searchGroups.append(searchGroup.append(createSearchGroupInput("language")));
        $("div#sidebar input[type=checkbox]#language").prop("checked", true);
    });

    // Remove the currently selected group if it's not the only one, and mark one
    // of its siblings as selected.
    $("button#remove-group").click(function(){
        var currentGroup = $("div.search-group#selected");

        if($("div.search-group").length == 1)
            return;
        else {
            var nextGroup = currentGroup.prev();
            if(nextGroup.size() == 0)
                nextGroup = currentGroup.next();
        }
        currentGroup.remove();
        nextGroup.click();
    });

    // Select a search group, and update the `#sidebar` checklist accordingly.
    $(document).on("click", "div.search-group", function(){
        searchGroups.children("#selected").removeAttr("id");
        $(this).attr("id", "selected");
        $("div#sidebar input[type=checkbox]").prop("checked", false);
        $(this).find("input[type=text]").each(function(){
            var checkBoxSelector = "div#sidebar input[type=checkbox]";
            $(checkBoxSelector + "#" + $(this).attr("class").split(" ")[0]).
                    prop("checked", true);
        })
    });

    // Add an input field to the currently selected search group.
    $("div#sidebar input[type=checkbox]").click(function(){
        var fieldId = $(this).prop("id");
        if($(this).is(":checked")){
            $("div.search-group#selected").append(
                    $.parseHTML(createSearchGroupInput(fieldId)));
            if(fieldId.slice(0, 4) == "date")
                $(".search-group#selected ." + fieldId).datepicker();
        }
        else
            $("div.search-group#selected ." + fieldId).remove()
    });
}());

/*
 * Return an HTML string representing a new input field div in a search group.
 *
 * @param fieldId The id of the input field div, and its child elements.
 */
function createSearchGroupInput(fieldId){
    return [
        "<div id='" + fieldId + "'>",
            "<div>" + fieldId.replace(/-/g, " ") + "</div>",
            "<input class='" + fieldId + "'type='text'/>",
            "<input type='checkbox' name='regex'><span>Regex</span>",
        "</div>"
    ].join("");
}

function assembleQuery(){
    var groups = searchGroups.children(".search-group");
    var groupQueries = [];

    for(var group = 0; group < groups.length; group++)
        console.log(group);
}