// Copyright 2018 Michel Peterson
//
// Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// ==UserScript==
// @name     Gerrit Zuul Status
// @author   Michel Peterson
// @version  6
// @grant    none
// @include  /^https?://review\.openstack\.org/(#/c/)?\d*?/?(\d*)?/?$/
// @require  https://code.jquery.com/jquery-3.3.1.min.js
// @require  https://review.openstack.org/static/hideci.js
// ==/UserScript==

// Config

const zuul_status_base = "https://zuul.openstack.org/";
const zuul_status_url = zuul_status_base + "api/status/change/";

// /Config

// Script start

/* defined by hideci.js */
/* global ci_latest_patchset, ci_parse_comments */

$("style#gerrit_sitecss").append(".result_RUNNING { color: #1e9ced; }");

var render = function(jobs) {
    var location = $("table.test_result_table");

    var table = "<tbody>" +
      "<tr>" +
      "<td class=\"header\">Zuul check</td>" +
      "<td class=\"header ci_date result_WARNING\">Still running</td>" +
      "</tr>";

    $.each(jobs, function(i, job) {
        var status_with_completeness = ((job.status === "running" && typeof job.completeness !== "undefined") ? "RUNNING (" + job.completeness + ")" : job.status.toUpperCase());
        var voting = job.voting === true ? "" : "<small> (non-voting)</small>";

        table += "<tr>" +
      "<td><a href=\"" + job.url + "\" rel=\"nofollow\">" + job.name + "</a>" + voting + "</td>" +
      "<td><span class=\"comment_test_result\"><span class=\"result_" + job.status.toUpperCase() +"\">" + status_with_completeness + "</span></td>" +
      "</tr>";
    });

    table += "</tbody>";

    location.html(table);
};

var main = function() {
    const url = $(location).attr("href");
    const matches_url = /^https?:\/\/review\.openstack\.org\/(#\/c\/)?(\d*)\/?(\d*)?\/?$/.exec(url);

    const change_id = matches_url[2];
    var change_ver = matches_url[3];

    if (typeof change_ver === "undefined"){
        change_ver = ci_latest_patchset(ci_parse_comments());
    }

    var status_url = zuul_status_url + change_id + "," + change_ver;


    $.getJSON(status_url, function(data) {
        var queue;
        var jobs = [];

        if (data.length === 0){
            if ($(".result_WARNING").length > 0){
                location.reload();
            }
            return;
        }

        for(var i=0; i <= data.length; i++){
            queue = data[i];
            if (queue.items_behind.length == 0){
                break;
            }
        }

        if (!queue){
            console.log("couldn't find a queue");
            return;
        }

        $.each(queue.jobs, function(i, job) {
            var item = {};

            item.status = job.result ? job.result.toLowerCase() : (job.url ? "running" : "queued");
            item.name = job.name;
            item.voting = job.voting;
            item.pipeline = job.pipeline;
            item.url = job.result ? job.report_url : (job.url ? zuul_status_base + job.url : "#");

            if (item.status === "running" && job.remaining_time !== null){
                item.completeness = Math.round(100 * (job.elapsed_time / (job.elapsed_time + job.remaining_time))) + "%";
            }

            jobs.push(item);

        });

        render(jobs);
        setTimeout(main, 2000);
    });
};


// So we refresh on each update.

var MutationObserver = window.MutationObserver || window.WebKitMutationObserver;
/* eslint no-unused-vars: 0 */
var observer = new MutationObserver(function(mutations, observer) {
    var span = $("span.rpcStatus");
    $.each(mutations, function(i, mutation) {
        if (mutation.target === span[0] &&
        mutation.attributeName === "style" &&
        (!(span.is(":visible")))) {
            main();
        }
    });
});
observer.observe(document, {
    subtree: true,
    attributes: true
});