/**
 * This is how we bootstrap JS code in our modules
 */
(function(Icinga, $) {

    'use strict';

    Icinga.Module = function (icinga, name, prototyp) {

        // The Icinga instance
        this.icinga = icinga;

        // Event handlers registered by this module
        this.handlers = [];

        this.registeredHandlers = {};

        // The module name
        this.name = name;

        // The JS prototype for this module
        this.prototyp = prototyp;

        // Once initialized, this will be an instance of the modules prototype
        this.object = {};

        // Initialize this module
        this.initialize();
    };

    Icinga.Module.prototype = {

        initialize: function () {

            try {

                // The constructor of the modules prototype must be prepared to get an
                // instance of Icinga.Module
                this.object = new this.prototyp(this);
                this.applyRegisteredEventHandlers();
            } catch(e) {
                this.icinga.logger.error(
                    'Failed to load module ' + this.name + ': ',
                    e
                );

                return false;
            }

            // That's all, the module is ready
            this.icinga.logger.debug(
                'Module ' + this.name + ' has been initialized'
            );

            return true;
        },

        /**
         * Globally register this modules event handlers
         */
        registerEventHandlers: function (handlers) {
            this.registeredHandlers = handlers;
            return this;
        },

        applyRegisteredEventHandlers: function () {

            var self = this;

            $.each(this.registeredHandlers, function (filter, events) {

                $.each(events, function (event, handler) {
                    // TODO: if (event[1] === 'each') {
                    // $(event[0], $(el)).each(event[2]);
                    self.bindEventHandler(
                        event,
                        '.module-' + self.name + ' ' + filter,
                        handler
                    );
                });
            });
            self = null;

            return this;
        },

        /**
         * Effectively bind the given event handler
         */
        bindEventHandler: function (event, filter, handler) {
            var self = this;
            this.icinga.logger.debug('Bound ' + filter + ' .' + event + '()');
            this.handlers.push([event, filter, handler]);
            $(document).on(event, filter, handler.bind(self.object));
        },

        /**
         * Unbind all event handlers bound by this module
         */
        unbindEventHandlers: function () {
            $.each(this.handlers, function (idx, handler) {
                $(document).off(handler[0], handler[1], handler[2]);
            });
        },

        /**
         * Allow to destroy and clean up this module
         */
        destroy: function () {

            this.unbindEventHandlers();

            if (typeof this.object.destroy === 'function') {
              this.object.destroy();
            }

            this.object = null;
            this.icinga = null;
            this.prototyp = null;
        }

    };

}(Icinga, jQuery));