/**
 * Created by SpeedProg on 05.04.2015.
 */

/*
Takes a prefix, query typeahead callback, Bloodhound typeahead adapter
 and returns the completions it gets from the bloodhound engine prefixed.
 */
function prefixed_source(prefix, query, cb, bhAdapter) {
    bhAdapter(query, function(retArray){
        var matches = [];
        for (var i = 0; i < retArray.length; i++) {
            var obj = {name : prefix + retArray[i].name};
            matches.push(obj);
        }
        cb(matches);
    });
}
function get_path(){
    var jsFileLocation = $("script[src*=edit_books]").attr("src");  // the js file path
    jsFileLocation = jsFileLocation.replace("/static/js/edit_books.js", '');   // the js folder path
    return jsFileLocation;
}

var authors = new Bloodhound({
    name: "authors",
    datumTokenizer: function(datum) {
        return [datum.name];
    },
    queryTokenizer: Bloodhound.tokenizers.whitespace,
    remote: {
        url: get_path()+"/get_authors_json?q=%QUERY"
    }
});

function authors_source(query, cb) {
    var bhAdapter = authors.ttAdapter();

    var tokens = query.split("&");
    var current_author = tokens[tokens.length-1].trim();

    tokens.splice(tokens.length-1, 1); // remove last element
    var prefix = "";
    for (var i = 0; i < tokens.length; i++) {
        var author = tokens[i].trim();
        prefix += author + " & ";
    }

    prefixed_source(prefix, current_author, cb, bhAdapter);
}



var promise = authors.initialize();
    promise.done(function(){
    $("#bookAuthor").typeahead(
            {
                highlight: true, minLength: 1,
                hint: true
            }, {
                name: "authors",
                displayKey: "name",
                source: authors_source
            }
    )
});

var series = new Bloodhound({
    name: "series",
    datumTokenizer: function(datum) {
        return [datum.name];
    },
    queryTokenizer: function(query) {
        return [query];
    },
    remote: {
        url: get_path()+"/get_series_json?q=",
        replace: function(url, query) {
            return url+encodeURIComponent(query);
        }
    }
});
var promise = series.initialize();
    promise.done(function(){
    $("#series").typeahead(
            {
                highlight: true, minLength: 0,
                hint: true
            }, {
                name: "series",
                displayKey: "name",
                source: series.ttAdapter()
            }
    )
});

var tags = new Bloodhound({
    name: "tags",
    datumTokenizer: function(datum) {
        return [datum.name];
    },
    queryTokenizer: function(query) {
        var tokens = query.split(",");
        tokens = [tokens[tokens.length-1].trim()];
        return tokens;
    },
    remote: {
        url: get_path()+"/get_tags_json?q=%QUERY"
    }
});

function tag_source(query, cb) {
    var bhAdapter = tags.ttAdapter();

    var tokens = query.split(",");
    var current_tag = tokens[tokens.length-1].trim();

    tokens.splice(tokens.length-1, 1); // remove last element
    var prefix = "";
    for (var i = 0; i < tokens.length; i++) {
        var tag = tokens[i].trim();
        prefix += tag + ", ";
    }

    prefixed_source(prefix, current_tag, cb, bhAdapter);
}

var promise = tags.initialize();
    promise.done(function(){
    $("#tags").typeahead(
            {
                highlight: true, minLength: 0,
                hint: true
            }, {
                name: "tags",
                displayKey: "name",
                source: tag_source
            }
    )
});

var languages = new Bloodhound({
    name: "languages",
    datumTokenizer: function(datum) {
        return [datum.name];
    },
    queryTokenizer: function(query) {
        return [query];
    },
    remote: {
        url: get_path()+"/get_languages_json?q=",
        replace: function(url, query) {
            url_query = url+encodeURIComponent(query);
            return url_query;
        }
    }
});

function language_source(query, cb) {
    var bhAdapter = languages.ttAdapter();

    var tokens = query.split(",");
    var currentLanguage = tokens[tokens.length-1].trim();

    tokens.splice(tokens.length-1, 1); // remove last element
    var prefix = "";
    for (var i = 0; i < tokens.length; i++) {
        var tag = tokens[i].trim();
        prefix += tag + ", ";
    }

    prefixed_source(prefix, currentLanguage, cb, bhAdapter);
}

var promise = languages.initialize();
    promise.done(function(){
    $("#languages").typeahead(
            {
                highlight: true, minLength: 0,
                hint: true
            }, {
                name: "languages",
                displayKey: "name",
                source: language_source
            }
    )
});

$("form").on("change input typeahead:selected", function(data){
    var form = $("form").serialize();
    $.getJSON( get_path()+"/get_matching_tags", form, function( data ) {
      $(".tags_click").each(function() {
        if ($.inArray(parseInt($(this).children("input").first().val(), 10), data.tags) === -1 ) {
          if (!($(this).hasClass("active"))) {
            $(this).addClass("disabled");
          }
        }
        else {
          $(this).removeClass("disabled");
        }
      });
    });
});