// Released under the MIT/X11 license
// http://www.opensource.org/licenses/mit-license.php
"use strict";
var bugURL = "https://bugzilla.redhat.com/show_bug.cgi?id=";
var BTSPrefNS = "bugzilla-triage.setting.";

// Shared contstants
var NumberOfFrames = 7;

// constants
var SalmonPink = new Color(255, 224, 176); // RGB 255, 224, 176; HSL 36, 2,
                       // 85
var ReporterColor = new Color(255, 255, 166); // RGB 255, 255, 166; HSL 60, 2,
                        // 83

// global variables
var config = {};
var constantData = {}; // This should be probably eliminated ASAP or
                       // or done by other means. TODO
var equivalentComponents = null;
/**
 * central handler processing messages from the main script.
 */
self.on('message', function onMessage(msg) {
  console.log("onMessage - incoming : msg.cmd = " + msg.cmd);
  switch (msg.cmd) {
  case "ReloadThePage":
    document.location.reload(true);
    break;
  case "queryLocal":
    queryInNewTab(msg.data, getComponent(), getProduct(), equivalentComponents);
    break;
  case "CreateButtons":
    constantData = msg.data.constData;
    config = msg.data.config;
    equivalentComponents = ("equivalentComponents" in constantData) ?
      constantData.equivalentComponents : null;
    generateButtons(msg.data.instPkgs, msg.data.kNodes);
    break;
  case "Error":
    alert("Error " + msg.data);
    break;
  case "Unhandled":
    break;
  default:
    if (TweakOnMessageHandler) {
      TweakOnMessageHandler(msg, RHOnMessageHandler);
    }
    else {
      console.error("Error: unknown RPC call " + msg.toSource());
    }
  }
});

/**
 * @param cmd
 *          Object with all commands to be executed
 *
 * PROBLEM: according to
 * https://developer.mozilla.org/en/Core_JavaScript_1.5_Reference\
 * /Statements/for...in there is no guaranteed order of execution of commands
 * (i.e., key, commentObj[key] pairs) in for..in cycle. According to
 * https://developer.mozilla.org/en/Core_JavaScript_1.5_Reference\
 * /Operators/Special_Operators/delete_Operator#Cross-browser_issues it seems
 * that everywhere except of Internet Explorer this should work well, but
 * waiting impatiently when this bite us.
 */
function executeCommand(cmdObj) {
  for (var key in cmdObj) {
    centralCommandDispatch(key, cmdObj[key]);
  }
}

/**
 * Actual execution function
 *
 * @param cmdLabel
 *          String with the name of the command to be executed
 * @param cmdParams
 *          Object with the appropriate parameters for the command
 */
function centralCommandDispatch (cmdLabel, cmdParams) {
  console.log("centralCommandDispatch : cmdLabel = " + cmdLabel);
  switch (cmdLabel) {
  case "name":
  case "position":
    break;
  case "resolution":
  case "product":
  case "component":
  case "version":
  case "priority":
    selectOption(cmdLabel, cmdParams);
    break;
  case "status":
    selectOption("bug_status", cmdParams);
    break;
  case "platform":
    selectOption("rep_platform", cmdParams);
    break;
  case "os":
    selectOption("op_sys", cmdParams);
    break;
  case "severity":
    selectOption("bug_severity", cmdParams);
    break;
  case "target":
    selectOption("target_milestone", cmdParams);
    break;
  case "addKeyword":
    addStuffToTextBox("keywords",cmdParams);
    break;
  case "removeKeyword":
    removeStuffFromTextBox("keywords", cmdParams);
    break;
  case "addWhiteboard":
    addStuffToTextBox("status_whiteboard",cmdParams);
    break;
  case "removeWhiteboard":
    removeStuffFromTextBox("status_whiteboard",cmdParams);
    break;
  case "assignee":
    changeAssignee(cmdParams);
    break;
  case "qacontact":
    clickMouse("bz_qa_contact_edit_action");
    document.getElementById("qa_contact").value = cmdParams;
    break;
  case "url":
    clickMouse("bz_url_edit_action");
    document.getElementById("bug_file_loc").value = cmdParams;
    break;
  // TODO dependson/blocked doesn't work. Find out why.
  case "addDependsOn":
    clickMouse("dependson_edit_action");
    addStuffToTextBox("dependson", cmdParams);
    break;
  case "removeDependsOn":
    clickMouse("dependson_edit_action");
    removeStuffFromTextBox("dependson", cmdParams);
    break;
  case "addBlocks":
    clickMouse("blocked_edit_action");
    addStuffToTextBox("blocked", cmdParams);
    break;
  case "removeBlocks":
    clickMouse("blocked_edit_action");
    removeStuffFromTextBox("blocked", cmdParams);
    break;
  case "comment":
    addStuffToTextBox("comment", cmdParams);
    break;
  case "commentIdx":
    throw "There should be no commentIdx here at all.";
    break;
  case "setNeedinfo":
    // cmdParams are actually ignored for now; we may in future
    // distinguish different actors to be target of needinfo
    setNeedinfoReporter();
    break;
  case "addCC":
    addToCCList(cmdParams);
    break;
  case "queryStringOurBugzilla":
    queryForSelection();
    break;
  // TODO flags, see also
  case "commit":
    if (cmdParams) {
      // Directly commit the form
      document.forms.namedItem("changeform").submit();
    }
    break;
  default:
    if (RHcentralCommandDispatch) {
      RHcentralCommandDispatch(cmdLabel, cmdParams);
    }
    else {
      console.error("Unknown command:\n" + cmdLabel + "\nparameters:\n" + cmdParams);
    }
    break;
  }
}

/**
 * Change assignee of the bug
 *
 * @param newAssignee
 *          String with the email address of new assigneeAElement or 'default'
 *          if the component's default assignee should be used. Value null
 *          clears "Reset Assignee to default for component" checkbox
 * @return none
 */
function changeAssignee (newAssignee) {
  var defAssigneeButton = null;
  // Previous assignee should know what's going on in his bug
  addToCCList(getOwner());

  // Optional value null
  if (newAssignee === null) {
    document.getElementById("set_default_assignee").removeAttribute(
      "checked");
    return ;
  }

  if (getDefaultAssignee) {
    if (newAssignee === "default") {
      var defAss = getDefaultAssignee();
      if (defAss) {
        newAssignee = defAss;
      }
      else {
        return ;
      }
    }
  }

  if (newAssignee) {
    clickMouse("bz_assignee_edit_action");
    document.getElementById("assigned_to").value = newAssignee;
    document.getElementById("set_default_assignee").checked = false;
    defAssigneeButton = document.getElementById("defassignee_btn");
    if (defAssigneeButton) {
      defAssigneeButton.style.display = "none";
    }
  }
}

/**
 * Adds new option to the 'comment_action' scroll down box
 *
 * @param pkg
 *          String package name
 * @param cmd
 *          String with the name of the command If the 'comment_action' scroll
 *          down box doesn't exist, this function will set up new one.
 */
function addToCommentsDropdown (cmdObj) {
  var select = document.getElementById("comment_action");
  if (!select) {
    config.commandsList = [];
    document.getElementById("comments").innerHTML +=
      "<div id='make_bugzilla_comment_action'>" +
      "  <label for='comment_action'>Add Comment: </label>" +
      "  <select id='comment_action'>" +
      "  <option value=''>-- Select Comment from List --</option>" +
      "  </select>" +
      "</div>";
    select = document.getElementById("comment_action");
    select.addEventListener("change", function (evt) {
      var value = select.options[select.selectedIndex].value;
      executeCommand(config.commandsList[value]);
    }, false);
  }

  var opt = document.createElement("option");
  var objIdx = config.commandsList.length + 1;
  opt.value = objIdx;
  config.commandsList[objIdx] = cmdObj;
  opt.textContent = cmdObj.name;
  select.appendChild(opt);
}

/**
 * Generate button based on
 */
function generateButtons (pkgs, kNodes) {
  var topRowPosition = "topRowPositionID";
  var bottomRowPosition = "commit";

  // =========================================================
  if (kNodes && window.location.hostname in kNodes) {
      var killConf = kNodes[window.location.hostname];
      killNodes(document, killConf[0], killConf[1]);
  }

  // create anchor for the top toolbar
  var commentBox = document.getElementById("comment");
  var brElement = document.createElement("br");
  brElement.setAttribute("id",topRowPosition);
  commentBox.parentNode.normalize();
  commentBox.parentNode.insertBefore(brElement, commentBox);

  for (var pkg in pkgs) {
    for (var cmdIdx in pkgs[pkg]) {
      var cmdObj = pkgs[pkg][cmdIdx];
      if (cmdObj.position !== undefined) {
        switch (cmdObj.position) {
        case "topRow":
          createNewButton(topRowPosition, false, cmdObj);
          break;
        case "bottomRow":
          createNewButton(bottomRowPosition, false, cmdObj);
          break;
        case "dropDown":
          addToCommentsDropdown(cmdObj);
          break;
        default: // [+-]ID
          var firstChr = cmdObj.position.charAt(0);
          var newId = cmdObj.position.substr(1);
          createNewButton(newId, firstChr === "+", cmdObj);
          break;
        }
      }
      else {
        console.error("generateButtons : rejected cmdObj = " +
          cmdObj.toSource());
      }
    }
  }
  // TODO This is weird in this place, but that's the place where all
  // constantData etc.
  // are finally defined and available.
  if (RHBZinit) {
    console.log("call RHBZinit!");
    RHBZinit();
  }

  if (tweakBugzilla) {
    tweakBugzilla(document, constantData);
  }
}

function setConfigurationButton () {
  var additionalButtons = document.querySelector("#bugzilla-body *.related_actions");
  var configurationButtonUI = document.createElement("li");
  configurationButtonUI.innerHTML = "\u00A0-\u00A0<a href='' id='configurationButton'>"
    + "Triage configuration</a>";
  additionalButtons.appendChild(configurationButtonUI);
  document.getElementById("configurationButton").addEventListener(
    "click",
    function(evt) {
      self.postMessage(new Message("ChangeJSONURL", null));
      evt.stopPropagation();
      evt.preventDefault();
  }, false);
}

/**
 * dd
 *
 * @return Element with the href attribute containng the information
 */
function getOptionTableCell(tableId, label) {
  var cleanLabelRE = new RegExp("^\\s*([^.:]*):?\\s*$");
  label = label.trim().replace(cleanLabelRE,"$1").toLowerCase();

  var rows = document.getElementById(tableId).getElementsByTagName("tr");
  var ourLine = Array.filter(rows, function(row) {
    var curLabel = row.getElementsByTagName("td")[0].textContent.toLowerCase();
    curLabel = curLabel.replace(cleanLabelRE,"$1");
    return (curLabel === label); // maybe this could be a RE match instead
  });

  if (ourLine.length > 0) {
    return ourLine[0].getElementsByTagName("td")[1].
      getElementsByTagName("a")[0];
  }
  return null;
}

/**
 * Parse the row with the attachment
 *
 * @param DOM
 *          element to be parsed
 * @return array with string name of the attachment, integer its id number,
 *         string of MIME type, integer of size in kilobytes, and the whole
 *         element itself
 *
 * TODO error handling is missing ... it's bleee
 */
function parseAttachmentLine(inElem) {
  var MIMEtype = "";
  var size = 0;

  // Skip over obsolete attachments
  if (inElem.getElementsByClassName("bz_obsolete").length > 0) {
    return ([]);
  }

  // getting name of the attachment
  var attName = inElem.getElementsByTagName("b")[0].textContent.trim();

  // TODO probably could use url.URL object
  var aHrefsArr = inElem.getElementsByTagName("a");
  var aHref = Array.filter(aHrefsArr, function(x) {
    return x.textContent.trim() === "Details";
  })[0];
  var id = parseURL(aHref.getAttribute("href")).params.id;

  // getting MIME type and size
  var stringArray = inElem.getElementsByClassName("bz_attach_extra_info")[0].textContent.
      replace(/[\n ()]+/g, " ").trim().split(", ");
  size = parseInt(stringArray[0], 10);
  MIMEtype = stringArray[1].split(" ")[0];

  return [ attName, id, MIMEtype, size, inElem ];
}

function startup() {
  // First, preflight check ... if we are not logged in, there
  // is nothing we can do.
  var logoutLink = Array.some(document.links, function (x) {
    return x.search === "?logout=1" ;
  });
  if (!logoutLink) {
    return null; // This should just finish whole content script without
    // doing any harm to anybody.
  }

  // Prepare for query buttons
  // element ID brElementPlace_location is later used in JSON files
  // Stay with this add_comment element even if RH BZ upgrades, this seems
  // to be generally much more stable (even with other bugzillas, e.g.
  // b.gnome.org)
  // then some getElementById.
  var commentArea = document.getElementsByName("add_comment")[0].parentNode;
  if (commentArea) {
    var brElementPlacer = commentArea.getElementsByTagName("br");
    brElementPlacer = brElementPlacer[0];
    if (brElementPlacer) {
      brElementPlacer.setAttribute("id","brElementPlacer_location");
      brElementPlacer.parentNode.insertBefore(document.createElement("br"),
        brElementPlacer);
    }
  }

  // TODO Probably could be ignored ... used only once on line 973 of
  // rhbzpage.js
  // if (parseAbrtBacktraces && this.RE.Abrt.test(getSummary())) {
  // title = document.getElementById("short_desc_nonedit_display").textContent;

  // So, now we know we are logged in, so we can get to
  // the real work.
  setConfigurationButton();
  submitHandlerInstalled = false;

  checkComments();

  self.postMessage(new Message("GetInstalledPackages", {
    location: window.location.href,
    login: getLogin()
  }));
}

startup();