////////////////////////////////////////////////////////////////////////
// OldBrowser API
////////////////////////////////////////////////////////////////////////

exports.VERSIONINFO = "OldBrowser Lib (oldbrowser.js) version 0.1";
exports.global = global;
exports.require = global.require;

////////////////////////////////////////////////////////////////////////
// only less than IE 9
////////////////////////////////////////////////////////////////////////
if (!window.addEventListener) {
    global.Element = function() {};

    (function(WindowPrototype, DocumentPrototype, ElementPrototype, registry) {
        if (!DocumentPrototype.head) {
            DocumentPrototype.head = (function() {
                return DocumentPrototype.getElementsByTagName("head")[0];
            })();
        }

        if (!DocumentPrototype.getElementsByClassName) {
            DocumentPrototype.getElementsByClassName = function(search) {
                var d = document,
                    elements, pattern, i, results = [];
                if (d.querySelectorAll) { // IE8
                    return d.querySelectorAll("." + search);
                }
                if (d.evaluate) { // IE6, IE7
                    pattern = ".//*[contains(concat(' ', @class, ' '), ' " + search + " ')]";
                    elements = d.evaluate(pattern, d, null, 0, null);
                    while ((i = elements.iterateNext())) {
                        results.push(i);
                    }
                } else {
                    elements = d.getElementsByTagName("*");
                    pattern = new RegExp("(^|\\s)" + search + "(\\s|$)");
                    for (i = 0; i < elements.length; i++) {
                        if (pattern.test(elements[i].className)) {
                            results.push(elements[i]);
                        }
                    }
                }
                return results;
            }
        }

        var enableEventListener = function(obj, registry) {
            obj.addEventListener = function(type, listener) {
                var target = this;

                if (typeof(registry) === "undefined")
                    registry = [];

                registry.unshift([target, type, listener, function(event) {
                    event.currentTarget = target;
                    event.preventDefault = function() {
                        event.returnValue = false
                    };
                    event.stopPropagation = function() {
                        event.cancelBubble = true
                    };
                    event.target = event.srcElement || target;

                    listener.call(target, event);
                }]);

                this.attachEvent("on" + type, registry[0][3]);
            };

            obj.removeEventListener = function(type, listener) {
                for (var index = 0, register; register = registry[index]; ++index) {
                    if (register[0] == this && register[1] == type && register[2] == listener) {
                        return this.detachEvent("on" + type, registry.splice(index, 1)[0][3]);
                    }
                }
            };

            obj.dispatchEvent = function(eventObject) {
                return this.fireEvent("on" + eventObject.type, eventObject);
            };
        };

        WindowPrototype.enableEventListener = function(obj) {
            if (!obj.addEventListener) {
                enableEventListener(obj);
            }
        };
        enableEventListener(WindowPrototype, registry);
        enableEventListener(DocumentPrototype, registry);
        enableEventListener(ElementPrototype, registry);

        var __createElement = DocumentPrototype.createElement;
        DocumentPrototype.createElement = function(tagName) {
            var element = __createElement(tagName);
            if (element == null) {
                return null;
            }
            for (var key in ElementPrototype)
                element[key] = ElementPrototype[key];
            return element;
        }

        var __getElementById = DocumentPrototype.getElementById;
        DocumentPrototype.getElementById = function(id) {
            var element = __getElementById(id);
            if (element == null) {
                return null;
            }
            for (var key in ElementPrototype)
                element[key] = ElementPrototype[key];
            return element;
        }
    })(window, document, global.Element.prototype, []);
}

////////////////////////////////////////////////////////////////////////
// exports.getIEVersion()
////////////////////////////////////////////////////////////////////////
exports.getIEVersion = function() {
    var undef,
        v = 3,
        div = document.createElement('div'),
        all = div.getElementsByTagName('i');

    while (
        div.innerHTML = '<!--[if gt IE ' + (++v) + ']><i></i><![endif]-->',
        all[0]
    );

    return v > 4 ? v : undef;
};

////////////////////////////////////////////////////////////////////////
// exports.addScript()
////////////////////////////////////////////////////////////////////////
exports.addScript = function(url, callback, test, ttl) {
    var _callback = function(el, ttl) {
        var result = test(el);
        if (typeof(result) !== "undefined") {
            callback(el);
        } else {
            setTimeout(function() {
                if (ttl > 0) {
                    _callback(el, ttl - 1);
                } else {
                    console.log("failed load " + url);
                }
            }, 1);
        }
    };

    var el = document.createElement("script");
    el.src = url;
    el.type = "text/javascript";
    el.charset = "utf-8";
    document.head.appendChild(el);

    if (typeof(test) === "function" && typeof(callback) === "function") {
        // Time-To-Live: default value is 30 seconds
        ttl = (typeof(ttl) == "number" ? ttl : 30000);
        el.onload = _callback(el, ttl);
    } else if (typeof(callback) === "function") {
        el.onload = callback(el);
    }

    return el;
};

////////////////////////////////////////////////////////////////////////
// exports.addStylesheet()
////////////////////////////////////////////////////////////////////////
exports.addStylesheet = function(url, callback) {
    var el = document.createElement("link");
    el.href = url;
    el.rel = "stylesheet";
    el.type = "text/css";
    el.media = "screen, projection";
    document.head.appendChild(el);
    if (typeof(callback) === "function") {
        el.onload = callback(el);
    }
    return el;
};

////////////////////////////////////////////////////////////////////////
// exports.setContent()
////////////////////////////////////////////////////////////////////////
exports.setContent = function(content) {
    document.getElementById("app").innerHTML = content;
};

////////////////////////////////////////////////////////////////////////
// exports.start()
////////////////////////////////////////////////////////////////////////
exports.start = function(callback) {
    var IEVersion = exports.getIEVersion();

    if (IEVersion == 8) {
        exports.addScript("app/assets/css/jquery/webreflection-ie8-0.8.1.min.js");
    }

    // load javascripts dynamically
    exports.addScript("app/assets/js/es5-shim-4.5.14.min.js");
    exports.addScript("app/assets/js/es5-sham-4.5.14.min.js");
    exports.addScript("app/assets/js/json3-3.3.2.min.js");
    exports.addScript("app/assets/js/es6-shim-0.35.5.min.js");
    exports.addScript("app/assets/js/es6-sham-0.35.5.min.js");
    exports.addScript("app/assets/js/html5shiv-printshiv-3.7.3.min.js");
    if (IEVersion < 9) {
        exports.addScript("app/assets/js/welsonjs-respond-1.4.2-modified.js");
        exports.addScript("app/assets/js/welsonjs-selectivizr-1.0.2-modified.js");
        exports.addScript("app/assets/js/excanvas-565afad.js");
        exports.addScript("app/assets/js/jquery-1.11.3.min.js", callback, function(el) {
            return window.jQuery;
        });
        exports.addScript("http://api.html5media.info/1.1.6/html5media.min.js");
    } else {
        exports.addScript("app/assets/js/jquery-3.5.1.min.js", callback, function(el) {
            return window.jQuery;
        });
    }

    // load Modernizr (2.8.3)
    exports.addScript("app/assets/js/modernizr-2.8.3.min.js");

    // load jQuery UI (1.12.1)
    exports.addScript("app/assets/js/jquery-ui-1.21.1.min.js");

    // load additional libraries
    if (IEVersion < 10) {
        exports.addScript("app/assets/js/PIE-1.0.0.js");
        exports.addScript("app/assets/js/jquery.html5-placeholder-shim-5a87f05.js");
        exports.addScript("app/assets/js/jquery.form-4.3.0.min.js");
    }

    // Vue (2.6.11)
    if (__config.library.indexOf("vue") > -1) {
        if (!__config.development) {
            exports.addScript("app/assets/js/vue-2.6.11.min.js");
        } else {
            exports.addScript("app/assets/js/vue-2.6.11.js");   
        }
    }
};