document.addEventListener('DOMContentLoaded', function() {
    var menuCollapsed = false,
        mobileMenu = document.getElementById('mobile-menu');

    var localContextInUrl = '';

    if (COMPODOC_CURRENT_PAGE_CONTEXT !== '') {
        localContextInUrl = localContextInUrl;
        switch (COMPODOC_CURRENT_PAGE_CONTEXT) {
            case 'additional-page':
                localContextInUrl = 'additional-documentation';
                break;
            case 'class':
                localContextInUrl = 'classes';
                break;
            case 'miscellaneous-functions':
            case 'miscellaneous-variables':
            case 'miscellaneous-typealiases':
            case 'miscellaneous-enumerations':
                localContextInUrl = 'miscellaneous';
            default:
                break;
        }
    }

    function hasClass(el, cls) {
        return el.className && new RegExp('(\\s|^)' + cls + '(\\s|$)').test(el.className);
    }

    var processLink = function(link, url) {
        if (url.charAt(0) !== '.') {
            var prefix = '';
            switch (COMPODOC_CURRENT_PAGE_DEPTH) {
                case 5:
                    prefix = '../../../../../';
                    break;
                case 4:
                    prefix = '../../../../';
                    break;
                case 3:
                    prefix = '../../../';
                    break;
                case 2:
                    prefix = '../../';
                    break;
                case 1:
                    prefix = '../';
                    break;
                case 0:
                    prefix = './';
                    break;
            }
            link.setAttribute('href', prefix + url);
        }
    };

    var processMenuLinks = function(links, dontAddClass) {
        for (var i = 0; i < links.length; i++) {
            var link = links[i];
            var linkHref = link.getAttribute('href');
            if (linkHref) {
                var linkHrefFile = linkHref.substr(linkHref.lastIndexOf('/') + 1, linkHref.length);
                if (
                    linkHrefFile.toLowerCase() === COMPODOC_CURRENT_PAGE_URL.toLowerCase() &&
                    link.innerHTML.indexOf('Getting started') == -1 &&
                    !dontAddClass &&
                    linkHref.toLowerCase().indexOf(localContextInUrl.toLowerCase()) !== -1
                ) {
                    link.classList.add('active');
                }
                processLink(link, linkHref);
            }
        }
    };
    var chapterLinks = document.querySelectorAll('[data-type="chapter-link"]');
    processMenuLinks(chapterLinks);
    var entityLinks = document.querySelectorAll('[data-type="entity-link"]');
    processMenuLinks(entityLinks);
    var indexLinks = document.querySelectorAll('[data-type="index-link"]');
    processMenuLinks(indexLinks, true);
    var entityLogos = document.querySelectorAll('[data-type="compodoc-logo"]');
    var processLogos = function(entityLogo) {
        for (var i = 0; i < entityLogos.length; i++) {
            var entityLogo = entityLogos[i];
            if (entityLogo) {
                var url = entityLogo.getAttribute('data-src');
                if (url.charAt(0) !== '.') {
                    var prefix = '';
                    switch (COMPODOC_CURRENT_PAGE_DEPTH) {
                        case 5:
                            prefix = '../../../../../';
                            break;
                        case 4:
                            prefix = '../../../../';
                            break;
                        case 3:
                            prefix = '../../../';
                            break;
                        case 2:
                            prefix = '../../';
                            break;
                        case 1:
                            prefix = '../';
                            break;
                        case 0:
                            prefix = './';
                            break;
                    }
                    entityLogo.src = prefix + url;
                }
            }
        }
    };
    processLogos(entityLogos);

    setTimeout(function() {
        document.getElementById('btn-menu').addEventListener('click', function() {
            if (menuCollapsed) {
                mobileMenu.style.display = 'none';
            } else {
                mobileMenu.style.display = 'block';
                document.getElementsByTagName('body')[0].style['overflow-y'] = 'hidden';
            }
            menuCollapsed = !menuCollapsed;
        });

        /**
         * Native bootstrap doesn't wait DOMContentLoaded event to start his job, re do it here
         */
        var Collapses = document.querySelectorAll('[data-toggle="collapse"]');
        for (var o = 0, cll = Collapses.length; o < cll; o++) {
            var collapse = Collapses[o],
                options = {};
            options.duration = collapse.getAttribute('data-duration');
            new Collapse(collapse, options);
        }

        // collapse menu
        var classnameMenuToggler = document.getElementsByClassName('menu-toggler'),
            faAngleUpClass = 'ion-ios-arrow-up',
            faAngleDownClass = 'ion-ios-arrow-down',
            toggleItemMenu = function(e) {
                var element = $(e.target),
                    parent = element[0].parentNode,
                    parentLink,
                    elementIconChild;
                if (parent) {
                    if (!$(parent).hasClass('linked')) {
                        e.preventDefault();
                    } else {
                        parentLink = parent.parentNode;
                        if (parentLink && element.hasClass('link-name')) {
                            $(parentLink).trigger('click');
                        }
                    }
                    elementIconChild = parent.getElementsByClassName(faAngleUpClass)[0];
                    if (!elementIconChild) {
                        elementIconChild = parent.getElementsByClassName(faAngleDownClass)[0];
                    }
                    if (elementIconChild) {
                        elementIconChild = $(elementIconChild);
                        if (elementIconChild.hasClass(faAngleUpClass)) {
                            elementIconChild.addClass(faAngleDownClass);
                            elementIconChild.removeClass(faAngleUpClass);
                        } else {
                            elementIconChild.addClass(faAngleUpClass);
                            elementIconChild.removeClass(faAngleDownClass);
                        }
                    }
                }
            };

        for (var i = 0; i < classnameMenuToggler.length; i++) {
            classnameMenuToggler[i].addEventListener('click', toggleItemMenu, false);
        }

        // Scroll to active link
        var menus = document.querySelectorAll('.menu'),
            i = 0,
            len = menus.length,
            activeMenu,
            activeMenuClass,
            activeLink;

        for (i; i < len; i++) {
            if (getComputedStyle(menus[i]).display != 'none') {
                activeMenu = menus[i];
                activeMenuClass = activeMenu.getAttribute('class').split(' ')[0];
            }
        }

        if (activeMenu) {
            activeLink = document.querySelector('.' + activeMenuClass + ' .active');
            if (activeLink) {
                var linkType = activeLink.getAttribute('data-type');
                var linkContext = activeLink.getAttribute('data-context');
                if (linkType === 'entity-link') {
                    var parentLi = activeLink.parentNode,
                        parentUl,
                        parentChapterMenu;
                    if (parentLi) {
                        parentUl = parentLi.parentNode;
                        if (parentUl) {
                            parentChapterMenu = parentUl.parentNode;
                            if (parentChapterMenu) {
                                var toggler = parentChapterMenu.querySelector('.menu-toggler'),
                                    elementIconChild = toggler.getElementsByClassName(
                                        faAngleUpClass
                                    )[0];
                                if (toggler && !elementIconChild) {
                                    toggler.click();
                                }
                            }
                        }
                    }
                    if (linkContext && linkContext === 'sub-entity') {
                        // Toggle also the master parent menu
                        var linkContextId = activeLink.getAttribute('data-context-id');
                        var toggler = activeMenu.querySelector(
                            '.chapter.' + linkContextId + ' a .menu-toggler'
                        );
                        if (toggler) {
                            toggler.click();
                        }
                        if (linkContextId === 'additional') {
                            var mainToggler = activeMenu.querySelector(
                                '.chapter.' + linkContextId + ' div.menu-toggler'
                            );
                            if (mainToggler) {
                                mainToggler.click();
                            }
                        }
                    }
                } else if (linkType === 'chapter-link') {
                    var linkContextId = activeLink.getAttribute('data-context-id');
                    var toggler = activeLink.querySelector('.menu-toggler');
                    if (toggler) {
                        toggler.click();
                    }
                    if (linkContextId === 'additional') {
                        var mainToggler = activeMenu.querySelector(
                            '.chapter.' + linkContextId + ' div.menu-toggler'
                        );
                        if (mainToggler) {
                            mainToggler.click();
                        }
                    }
                }
                setTimeout(function() {
                    activeMenu.scrollTop = activeLink.offsetTop;
                    if (
                        activeLink.innerHTML.toLowerCase().indexOf('readme') != -1 ||
                        activeLink.innerHTML.toLowerCase().indexOf('overview') != -1
                    ) {
                        activeMenu.scrollTop = 0;
                    }
                }, 300);
            }
        }
    }, 0);
});
