/* -*- Mode: JavaScript; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

const EXPORTED_SYMBOLS = ["sendLaterModule"];

var nsActProcess = Components.Constructor(
  "@mozilla.org/activity-process;1",
  "nsIActivityProcess",
  "init"
);
var nsActEvent = Components.Constructor(
  "@mozilla.org/activity-event;1",
  "nsIActivityEvent",
  "init"
);
var nsActWarning = Components.Constructor(
  "@mozilla.org/activity-warning;1",
  "nsIActivityWarning",
  "init"
);

/**
 * This really, really, sucks. Due to mailnews widespread use of
 * nsIMsgStatusFeedback we're bound to the UI to get any sensible feedback of
 * mail sending operations. The current send later code can't hook into the
 * progress listener easily to get the state of messages being sent, so we'll
 * just have to do it here.
 */
var sendMsgProgressListener = {
  QueryInterface: ChromeUtils.generateQI([
    "nsIMsgStatusFeedback",
    "nsISupportsWeakReference",
  ]),

  showStatusString(aStatusText) {
    sendLaterModule.onMsgStatus(aStatusText);
  },

  startMeteors() {},

  stopMeteors() {},

  showProgress(aPercentage) {
    sendLaterModule.onMessageSendProgress(0, 0, aPercentage, 0);
  },
};

// This module provides a link between the send later service and the activity
// manager.
var sendLaterModule = {
  _sendProcess: null,
  _copyProcess: null,
  _identity: null,
  _subject: null,

  get log() {
    delete this.log;
    return (this.log = console.createInstance({
      prefix: "mail.activity",
      maxLogLevel: "Warn",
      maxLogLevelPref: "mail.activity.loglevel",
    }));
  },

  get activityMgr() {
    delete this.activityMgr;
    return (this.activityMgr = Cc["@mozilla.org/activity-manager;1"].getService(
      Ci.nsIActivityManager
    ));
  },

  get bundle() {
    delete this.bundle;
    return (this.bundle = Services.strings.createBundle(
      "chrome://messenger/locale/activity.properties"
    ));
  },

  QueryInterface: ChromeUtils.generateQI(["nsIMsgSendLaterListener"]),

  _displayTextForHeader(aLocaleStringBase, aSubject) {
    return aSubject
      ? this.bundle.formatStringFromName(aLocaleStringBase + "WithSubject", [
          aSubject,
        ])
      : this.bundle.GetStringFromName(aLocaleStringBase);
  },

  _newProcess(aLocaleStringBase, aAddSubject) {
    let process = new nsActProcess(
      this._displayTextForHeader(
        aLocaleStringBase,
        aAddSubject ? this._subject : ""
      ),
      this.activityMgr
    );

    process.iconClass = "sendMail";
    process.groupingStyle = Ci.nsIActivity.GROUPING_STYLE_BYCONTEXT;
    process.contextObj = this;
    process.contextType = "SendLater";
    process.contextDisplayText =
      this.bundle.GetStringFromName("sendingMessages");

    return process;
  },

  // Use this to group an activity by the identity if we have one.
  _applyIdentityGrouping(aActivity) {
    if (this._identity) {
      aActivity.groupingStyle = Ci.nsIActivity.GROUPING_STYLE_BYCONTEXT;
      aActivity.contextType = this._identity.key;
      aActivity.contextObj = this._identity;
      let contextDisplayText = this._identity.identityName;
      if (!contextDisplayText) {
        contextDisplayText = this._identity.email;
      }

      aActivity.contextDisplayText = contextDisplayText;
    } else {
      aActivity.groupingStyle = Ci.nsIActivity.GROUPING_STYLE_STANDALONE;
    }
  },

  // Replaces the process with an event that reflects a completed process.
  _replaceProcessWithEvent(aProcess) {
    this.activityMgr.removeActivity(aProcess.id);

    let event = new nsActEvent(
      this._displayTextForHeader("sentMessage", this._subject),
      this.activityMgr,
      "",
      aProcess.startTime,
      new Date()
    );

    event.iconClass = "sendMail";
    this._applyIdentityGrouping(event);

    this.activityMgr.addActivity(event);
  },

  // Replaces the process with a warning that reflects the failed process.
  _replaceProcessWithWarning(
    aProcess,
    aCopyOrSend,
    aStatus,
    aMsg,
    aMessageHeader
  ) {
    this.activityMgr.removeActivity(aProcess.id);

    let warning = new nsActWarning(
      this._displayTextForHeader("failedTo" + aCopyOrSend, this._subject),
      this.activityMgr,
      ""
    );

    warning.groupingStyle = Ci.nsIActivity.GROUPING_STYLE_STANDALONE;
    this._applyIdentityGrouping(warning);

    this.activityMgr.addActivity(warning);
  },

  onStartSending(aTotalMessageCount) {
    if (!aTotalMessageCount) {
      this.log.error("onStartSending called with zero messages\n");
    }
  },

  onMessageStartSending(
    aCurrentMessage,
    aTotalMessageCount,
    aMessageHeader,
    aIdentity
  ) {
    // We want to use the identity and subject later, so store them for now.
    this._identity = aIdentity;
    if (aMessageHeader) {
      this._subject = aMessageHeader.mime2DecodedSubject;
    }

    // Create the process to display the send activity.
    let process = this._newProcess("sendingMessage", true);
    this._sendProcess = process;
    this.activityMgr.addActivity(process);

    // Now the one for the copy process.
    process = this._newProcess("copyMessage", false);
    this._copyProcess = process;
    this.activityMgr.addActivity(process);
  },

  onMessageSendProgress(
    aCurrentMessage,
    aTotalMessageCount,
    aMessageSendPercent,
    aMessageCopyPercent
  ) {
    if (aMessageSendPercent < 100) {
      // Ensure we are in progress...
      if (this._sendProcess.state != Ci.nsIActivityProcess.STATE_INPROGRESS) {
        this._sendProcess.state = Ci.nsIActivityProcess.STATE_INPROGRESS;
      }

      // ... and update the progress.
      this._sendProcess.setProgress(
        this._sendProcess.lastStatusText,
        aMessageSendPercent,
        100
      );
    } else if (aMessageSendPercent == 100) {
      if (aMessageCopyPercent == 0) {
        // Set send state to completed
        if (this._sendProcess.state != Ci.nsIActivityProcess.STATE_COMPLETED) {
          this._sendProcess.state = Ci.nsIActivityProcess.STATE_COMPLETED;
        }
        this._replaceProcessWithEvent(this._sendProcess);

        // Set copy state to in progress.
        if (this._copyProcess.state != Ci.nsIActivityProcess.STATE_INPROGRESS) {
          this._copyProcess.state = Ci.nsIActivityProcess.STATE_INPROGRESS;
        }

        // We don't know the progress of the copy, so just set to 0, and we'll
        // display an undetermined progress meter.
        this._copyProcess.setProgress(this._copyProcess.lastStatusText, 0, 0);
      } else if (aMessageCopyPercent >= 100) {
        // We need to set this to completed otherwise activity manager
        // complains.
        if (this._copyProcess) {
          this._copyProcess.state = Ci.nsIActivityProcess.STATE_COMPLETED;
          this.activityMgr.removeActivity(this._copyProcess.id);
          this._copyProcess = null;
        }

        this._sendProcess = null;
      }
    }
  },

  onMessageSendError(aCurrentMessage, aMessageHeader, aStatus, aMsg) {
    if (
      this._sendProcess &&
      this._sendProcess.state != Ci.nsIActivityProcess.STATE_COMPLETED
    ) {
      this._sendProcess.state = Ci.nsIActivityProcess.STATE_COMPLETED;
      this._replaceProcessWithWarning(
        this._sendProcess,
        "SendMessage",
        aStatus,
        aMsg,
        aMessageHeader
      );
      this._sendProcess = null;

      if (
        this._copyProcess &&
        this._copyProcess.state != Ci.nsIActivityProcess.STATE_COMPLETED
      ) {
        this._copyProcess.state = Ci.nsIActivityProcess.STATE_COMPLETED;
        this.activityMgr.removeActivity(this._copyProcess.id);
        this._copyProcess = null;
      }
    }
  },

  onMsgStatus(aStatusText) {
    this._sendProcess.setProgress(
      aStatusText,
      this._sendProcess.workUnitComplete,
      this._sendProcess.totalWorkUnits
    );
  },

  onStopSending(aStatus, aMsg, aTotalTried, aSuccessful) {},

  init() {
    // We should need to remove the listener as we're not being held by anyone
    // except by the send later instance.
    let sendLaterService = Cc[
      "@mozilla.org/messengercompose/sendlater;1"
    ].getService(Ci.nsIMsgSendLater);

    sendLaterService.addListener(this);

    // Also add the nsIMsgStatusFeedback object.
    let statusFeedback = Cc[
      "@mozilla.org/messenger/statusfeedback;1"
    ].createInstance(Ci.nsIMsgStatusFeedback);

    statusFeedback.setWrappedStatusFeedback(sendMsgProgressListener);

    sendLaterService.statusFeedback = statusFeedback;
  },
};