/* The contents of this file are subject to the Mozilla Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is the Bugzilla Bug Tracking System.
*
* Contributor(s):
*   Guy Pyrzak <guy.pyrzak@gmail.com>
*   Max Kanat-Alexander <mkanat@bugzilla.org>
*
*/

var BUGZILLA = $("#bugzilla-global").data("bugzilla");

$(function () {
  $('body').addClass("platform-" + navigator.platform);
  $('.show_mini_login_form').on("click", function (event) {
    return show_mini_login_form($(this).data('qs-suffix'));
  });
  $('.hide_mini_login_form').on("click", function (event) {
    return hide_mini_login_form($(this).data('qs-suffix'));
  });
  $('.show_forgot_form').on("click", function (event) {
    return show_forgot_form($(this).data('qs-suffix'));
  });
  $('.hide_forgot_form').on("click", function (event) {
    return hide_forgot_form($(this).data('qs-suffix'));
  });
  $('.check_mini_login_fields').on("click", function (event) {
    return check_mini_login_fields($(this).data('qs-suffix'));
  });
  $('.quicksearch_check_empty').on("submit", function (event) {
      if (this.quicksearch.value == '') {
          alert('Please enter one or more search terms first.');
          event.preventDefault();
      }
  });

  unhide_language_selector();
  $("#lob_action").on("change", update_text);
  $("#lob_newqueryname").on("keyup", manage_old_lists);
});

function unhide_language_selector() {
    $('#lang_links_container').removeClass('bz_default_hidden');
}

function update_text() {
    // 'lob' means list_of_bugs.
    var lob_action = document.getElementById('lob_action');
    var action = lob_action.options[lob_action.selectedIndex].value;
    var text = document.getElementById('lob_direction');
    var new_query_text = document.getElementById('lob_new_query_text');

    if (action == "add") {
        text.innerHTML = "to";
        new_query_text.style.display = 'inline';
    }
    else {
        text.innerHTML = "from";
        new_query_text.style.display = 'none';
    }
}

function manage_old_lists() {
    var old_lists = document.getElementById('lob_oldqueryname');
    // If there is no saved searches available, returns.
    if (!old_lists) return;

    var new_query = document.getElementById('lob_newqueryname').value;

    if (new_query != "") {
        old_lists.disabled = true;
    }
    else {
        old_lists.disabled = false;
    }
}


function show_mini_login_form( suffix ) {
    hide_forgot_form(suffix);
    $('#mini_login' + suffix).removeClass('bz_default_hidden').find('input[required]:first').focus();
    $('#new_account_container' + suffix).addClass('bz_default_hidden');
    return false;
}

function hide_mini_login_form( suffix ) {
    $('#mini_login' + suffix).addClass('bz_default_hidden');
    $('#new_account_container' + suffix).removeClass('bz_default_hidden');
    return false;
}

function show_forgot_form( suffix ) {
    hide_mini_login_form(suffix);
    $('#forgot_form' + suffix).removeClass('bz_default_hidden').find('input[required]:first').focus();
    $('#login_container' + suffix).addClass('bz_default_hidden');
    return false;
}


function hide_forgot_form( suffix ) {
    $('#forgot_form' + suffix).addClass('bz_default_hidden');
    $('#login_container' + suffix).removeClass('bz_default_hidden');
    return false;
}

function init_mini_login_form( suffix ) {
    var mini_login = document.getElementById('Bugzilla_login' +  suffix );
    var mini_password = document.getElementById('Bugzilla_password' +  suffix );
    var mini_dummy = document.getElementById('Bugzilla_password_dummy' + suffix);
    // If the login and password are blank when the page loads, we display
    // "login" and "password" in the boxes by default.
    if (mini_login.value == "" && mini_password.value == "") {
        YAHOO.util.Dom.addClass(mini_password, 'bz_default_hidden');
        YAHOO.util.Dom.removeClass(mini_dummy, 'bz_default_hidden');
    }
    else {
        show_mini_login_form(suffix);
    }
}

function check_mini_login_fields( suffix ) {
    var mini_login = document.getElementById('Bugzilla_login' +  suffix );
    var mini_password = document.getElementById('Bugzilla_password' +  suffix );
    if (mini_login.value != "" && mini_password.value != "") {
        return true;
    } else {
        window.alert("You must provide the email address and password before logging in.");
        return false;
    }
}

function set_language( value ) {
    Cookies.set('LANG', value, {
        expires: new Date('January 1, 2038'),
        path: BUGZILLA.param.cookie_path
    });
    window.location.reload()
}

// This basically duplicates Bugzilla::Util::display_value for code that
// can't go through the template and has to be in JS.
function display_value(field, value) {
    var field_trans = BUGZILLA.value_descs[field];
    if (!field_trans) return value;
    var translated = field_trans[value];
    if (translated) return translated;
    return value;
}

// polyfill .trim
if (!String.prototype.trim) {
    (function() {
        // Make sure we trim BOM and NBSP
        var rtrim = /^[\s\uFEFF\xA0]+|[\s\uFEFF\xA0]+$/g;
        String.prototype.trim = function() {
            return this.replace(rtrim, '');
        };
    })();
}

// html encoding
if (!String.prototype.htmlEncode) {
    (function() {
        String.prototype.htmlEncode = function() {
            return this.replace(/&/g, '&amp;')
                       .replace(/</g, '&lt;')
                       .replace(/>/g, '&gt;')
                       .replace(/"/g, '&quot;');
        };
    })();
}

// our auto-completion disables browser native autocompletion, however this
// excludes it from being restored by bf-cache.  trick the browser into
// restoring by changing the autocomplete attribute when a page is hidden and
// shown.
$().ready(function() {
    $(window).on('pagehide', function() {
        $('.bz_autocomplete').attr('autocomplete', 'on');
    });
    $(window).on('pageshow', function(event) {
        $('.bz_autocomplete').attr('autocomplete', 'off');
    });
});

/**
 * Focus the main content when the page is loaded and there is no autofocus
 * element, so the user can immediately scroll down the page using keyboard.
 */
const focus_main_content = () => {
    if (!document.querySelector('[autofocus]')) {
        document.querySelector('main').focus();
    }
}

/**
 * Check if Gravatar images on the page are successfully loaded, and if blocked
 * (by any content blocker), replace them with the default/fallback image.
 */
const detect_blocked_gravatars = () => {
    document.querySelectorAll('img[src^="https://secure.gravatar.com/avatar/"]').forEach($img => {
        if (!$img.complete || !$img.naturalHeight) {
            $img.src = 'extensions/Gravatar/web/default.jpg';
        }
    });
}

/**
 * If the current URL contains a hash like `#c10`, adjust the scroll position to
 * make some room above the focused element.
 */
const adjust_scroll_onload = () => {
    if (location.hash) {
        const $target = document.querySelector(location.hash);

        if ($target) {
            window.setTimeout(() => scroll_element_into_view($target), 50);
        }
    }
}

/**
 * Bring an element into the visible area of the browser window. Unlike the
 * native `Element.scrollIntoView()` function, this adds some extra room above
 * the target element. Smooth scroll can be done using CSS.
 * @param {Element} $target - An element to be brought.
 * @param {Function} [complete] - An optional callback function to be executed
 *  once the scroll is complete.
 */
const scroll_element_into_view = ($target, complete) => {
    let top = 0;
    let $element = $target;

    // Traverse up in the DOM tree to the scroll container of the
    // focused element, either `<main>` or `<div role="feed">`.
    do {
        top += ($element.offsetTop || 0);
        $element = $element.offsetParent;
    } while ($element && !$element.matches('main, [role="feed"]'))

    if (!$element) {
        return;
    }

    if (typeof complete === 'function') {
        const callback = () => {
            $element.removeEventListener('scroll', listener);
            complete();
        };

        // Emulate the `scrollend` event
        const listener = () => {
            window.clearTimeout(timer);
            timer = window.setTimeout(callback, 100);
        };

        // Make sure the callback is always fired even if no scroll happened
        let timer = window.setTimeout(callback, 100);

        $element.addEventListener('scroll', listener);
    }

    $element.scrollTop = top - 20;
}

window.addEventListener('DOMContentLoaded', focus_main_content, { once: true });
window.addEventListener('load', detect_blocked_gravatars, { once: true });
window.addEventListener('load', adjust_scroll_onload, { once: true });
window.addEventListener('hashchange', adjust_scroll_onload);