/* jshint unused:vars, undef:true, browser:true, jquery:true */
/* global _ */

;(function(global, $) {
    'use strict';

    global.Concrete = global.Concrete || {};
    global.console = global.console || {};

    global.ConcreteEvent = (function (ns) {
        var target = $('<span />'), debug = false;

        var hasGroup = typeof global.console.group === 'function' && typeof global.console.groupEnd === 'function',
            hasLog = typeof global.console.log === 'function';


        function groupLog(group, value, dontcall) {
            if (hasGroup) {
                global.console.groupCollapsed(group);

                if (!dontcall && typeof value === 'function') {
                    value();
                } else {
                    global.console.log(value);
                }
                global.console.groupEnd();
            } else if (hasLog) {

                if (!dontcall && typeof value === 'function') {
                    global.console.log('Group: "' + group + '"');
                    value();
                    global.console.log('GroupEnd: "' + group + '"');
                } else {
                    global.console.log(group, value);
                }
            }
        }

        function getTarget(given_target) {
            if (!given_target) given_target = target;
            if (!(given_target instanceof $)) given_target = $(given_target);
            if (!given_target.length) given_target = target;
            return given_target;
        }

        var ConcreteEvent = {

            debug: function (enabled) {
                if (typeof enabled === 'undefined') {
                    return debug;
                }
                return (debug = !!enabled);
            },

            subscribe: function (type, handler, target) {

                var old_handler = handler, bound_stack = (new Error('EventStack')).stack;
                handler = function() {
                    if (debug) {
                        groupLog('Handler Fired.', function () {
                            groupLog('Type', type, true);
                            groupLog('Handler', old_handler, true);
                            groupLog('Target', target, true);
                            groupLog('Bound Stack', bound_stack, true);
                            if (typeof global.console.trace === 'function') {
                                global.console.trace();
                            } else {
                                groupLog('Stack', (new Error('EventStack')).stack);
                            }

                        });
                    }

                    old_handler.apply(this, _(arguments).toArray());
                };
                if (debug) {
                    groupLog('Event Subscribed', function () {
                        groupLog('Type', type, true);
                        groupLog('Handler', old_handler, true);
                        groupLog('Target', target, true);
                        if (typeof global.console.trace === 'function') {
                            global.console.trace();
                        } else {
                            groupLog('Stack', (new Error('EventStack')).stack);
                        }
                    });

                }
                if (type instanceof Array) {
                    return _(type).each(function (v) {
                        ConcreteEvent.subscribe(v, handler, target);
                    });
                }
                getTarget(target).bind(type.toLowerCase(), handler);
                return ConcreteEvent;
            },

            publish: function (type, data, target) {
                if (debug) {
                    groupLog('Event Published', function () {
                        groupLog('Type', type, true);
                        groupLog('Data', data, true);
                        groupLog('Target', target, true);
                        if (typeof global.console.trace === 'function') {
                            global.console.trace();
                        } else {
                            groupLog('Stack', (new Error('EventStack')).stack);
                        }
                    });

                }
                if (type instanceof Array) {
                    return _(type).each(function (v) {
                        ConcreteEvent.publish(v, data, target);
                    });
                }
                getTarget(target).trigger(type.toLowerCase(), data);
                return ConcreteEvent;
            },

            unsubscribe: function (type, secondary_argument, target) {
                var args;
                if (debug) {
                    groupLog('Event Unsubscribed', function () {
                        groupLog('Type', type, true);
                        groupLog('Secondary Argument', secondary_argument, true);
                        groupLog('Target', target, true);
                        if (typeof global.console.trace === 'function') {
                            global.console.trace();
                        } else {
                            groupLog('Stack', (new Error('EventStack')).stack);
                        }
                    });

                }

                args = [(typeof type.toLowerCase === 'function' ? type.toLowerCase() : type)];

                if (typeof secondary_argument !== 'undefined') args.push(secondary_argument);
                $.fn.unbind.apply(getTarget(target), args);
                return ConcreteEvent;
            }
        };

        ConcreteEvent.sub = ConcreteEvent.bind = ConcreteEvent.watch = ConcreteEvent.on = ConcreteEvent.subscribe;
        ConcreteEvent.pub = ConcreteEvent.fire = ConcreteEvent.trigger = ConcreteEvent.publish;
        ConcreteEvent.unsub = ConcreteEvent.unbind = ConcreteEvent.unwatch = ConcreteEvent.off = ConcreteEvent.unsubscribe;

        ns.event = ConcreteEvent;
        return ConcreteEvent;
    }(global.Concrete));

})(window, jQuery);
