/* 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/. */

"use strict";

const TELEMETRY_DDSTAT_SHOWN = 0;
const TELEMETRY_DDSTAT_SHOWN_FIRST = 1;
const TELEMETRY_DDSTAT_CLICKED = 2;
const TELEMETRY_DDSTAT_CLICKED_FIRST = 3;
const TELEMETRY_DDSTAT_SOLVED = 4;

let gDecoderDoctorHandler = {
  getLabelForNotificationBox(type) {
    if (type == "platform-decoder-not-found") {
      if (AppConstants.platform == "win") {
        return gNavigatorBundle.getString("decoder.noHWAcceleration.message");
      }
      if (AppConstants.platform == "linux") {
        return gNavigatorBundle.getString("decoder.noCodecsLinux.message");
      }
    }
    if (type == "cannot-initialize-pulseaudio") {
      return gNavigatorBundle.getString("decoder.noPulseAudio.message");
    }
    if (type == "unsupported-libavcodec" && AppConstants.platform == "linux") {
      return gNavigatorBundle.getString(
        "decoder.unsupportedLibavcodec.message"
      );
    }
    if (type == "decode-error") {
      return gNavigatorBundle.getString("decoder.decodeError.message");
    }
    if (type == "decode-warning") {
      return gNavigatorBundle.getString("decoder.decodeWarning.message");
    }
    return "";
  },

  getSumoForLearnHowButton(type) {
    if (
      type == "platform-decoder-not-found" &&
      AppConstants.platform == "win"
    ) {
      return "fix-video-audio-problems-firefox-windows";
    }
    if (type == "cannot-initialize-pulseaudio") {
      return "fix-common-audio-and-video-issues";
    }
    return "";
  },

  getEndpointForReportIssueButton(type) {
    if (type == "decode-error" || type == "decode-warning") {
      return Services.prefs.getStringPref(
        "media.decoder-doctor.new-issue-endpoint",
        ""
      );
    }
    return "";
  },

  receiveMessage({ target: browser, data: data }) {
    let box = gBrowser.getNotificationBox(browser);
    let notificationId = "decoder-doctor-notification";
    if (box.getNotificationWithValue(notificationId)) {
      return;
    }

    let parsedData;
    try {
      parsedData = JSON.parse(data);
    } catch (ex) {
      Cu.reportError("Malformed Decoder Doctor message with data: " + data);
      return;
    }
    // parsedData (the result of parsing the incoming 'data' json string)
    // contains analysis information from Decoder Doctor:
    // - 'type' is the type of issue, it determines which text to show in the
    //   infobar.
    // - 'isSolved' is true when the notification actually indicates the
    //   resolution of that issue, to be reported as telemetry.
    // - 'decoderDoctorReportId' is the Decoder Doctor issue identifier, to be
    //   used here as key for the telemetry (counting infobar displays,
    //   "Learn how" buttons clicks, and resolutions) and for the prefs used
    //   to store at-issue formats.
    // - 'formats' contains a comma-separated list of formats (or key systems)
    //   that suffer the issue. These are kept in a pref, which the backend
    //   uses to later find when an issue is resolved.
    // - 'decodeIssue' is a description of the decode error/warning.
    // - 'resourceURL' is the resource with the issue.
    let {
      type,
      isSolved,
      decoderDoctorReportId,
      formats,
      decodeIssue,
      docURL,
      resourceURL,
    } = parsedData;
    type = type.toLowerCase();
    // Error out early on invalid ReportId
    if (!/^\w+$/im.test(decoderDoctorReportId)) {
      return;
    }
    let title = gDecoderDoctorHandler.getLabelForNotificationBox(type);
    if (!title) {
      return;
    }

    // We keep the list of formats in prefs for the sake of the decoder itself,
    // which reads it to determine when issues get solved for these formats.
    // (Writing prefs from e10s content is not allowed.)
    let formatsPref =
      formats && "media.decoder-doctor." + decoderDoctorReportId + ".formats";
    let buttonClickedPref =
      "media.decoder-doctor." + decoderDoctorReportId + ".button-clicked";
    let formatsInPref = formats && Services.prefs.getCharPref(formatsPref, "");

    if (!isSolved) {
      if (formats) {
        if (!formatsInPref) {
          Services.prefs.setCharPref(formatsPref, formats);
        } else {
          // Split existing formats into an array of strings.
          let existing = formatsInPref.split(",").map(x => x.trim());
          // Keep given formats that were not already recorded.
          let newbies = formats
            .split(",")
            .map(x => x.trim())
            .filter(x => !existing.includes(x));
          // And rewrite pref with the added new formats (if any).
          if (newbies.length) {
            Services.prefs.setCharPref(
              formatsPref,
              existing.concat(newbies).join(", ")
            );
          }
        }
      } else if (!decodeIssue) {
        Cu.reportError(
          "Malformed Decoder Doctor unsolved message with no formats nor decode issue"
        );
        return;
      }

      let buttons = [];
      let sumo = gDecoderDoctorHandler.getSumoForLearnHowButton(type);
      if (sumo) {
        buttons.push({
          label: gNavigatorBundle.getString("decoder.noCodecs.button"),
          accessKey: gNavigatorBundle.getString("decoder.noCodecs.accesskey"),
          callback() {
            let clickedInPref = Services.prefs.getBoolPref(
              buttonClickedPref,
              false
            );
            if (!clickedInPref) {
              Services.prefs.setBoolPref(buttonClickedPref, true);
            }

            let baseURL = Services.urlFormatter.formatURLPref(
              "app.support.baseURL"
            );
            openTrustedLinkIn(baseURL + sumo, "tab");
          },
        });
      }
      let endpoint = gDecoderDoctorHandler.getEndpointForReportIssueButton(
        type
      );
      if (endpoint) {
        buttons.push({
          label: gNavigatorBundle.getString("decoder.decodeError.button"),
          accessKey: gNavigatorBundle.getString(
            "decoder.decodeError.accesskey"
          ),
          callback() {
            let clickedInPref = Services.prefs.getBoolPref(
              buttonClickedPref,
              false
            );
            if (!clickedInPref) {
              Services.prefs.setBoolPref(buttonClickedPref, true);
            }

            let params = new URLSearchParams();
            params.append("url", docURL);
            params.append("label", "type-media");
            params.append("problem_type", "video_bug");
            params.append("src", "media-decode-error");

            let details = { "Technical Information:": decodeIssue };
            if (resourceURL) {
              details["Resource:"] = resourceURL;
            }

            params.append("details", JSON.stringify(details));
            openTrustedLinkIn(endpoint + "?" + params.toString(), "tab");
          },
        });
      }

      box.appendNotification(
        title,
        notificationId,
        "", // This uses the info icon as specified below.
        box.PRIORITY_INFO_LOW,
        buttons
      );
    } else if (formatsInPref) {
      // Issue is solved, and prefs haven't been cleared yet, meaning it's the
      // first time we get this resolution -> Clear prefs and report telemetry.
      Services.prefs.clearUserPref(formatsPref);
      Services.prefs.clearUserPref(buttonClickedPref);
    }
  },
};

window
  .getGroupMessageManager("browsers")
  .addMessageListener("DecoderDoctor:Notification", gDecoderDoctorHandler);
window.addEventListener("unload", function() {
  window
    .getGroupMessageManager("browsers")
    .removeMessageListener("DecoderDoctor:Notification", gDecoderDoctorHandler);
});