/* 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/. */

var Cu = Components.utils;
const {require} = Cu.import("resource://devtools/shared/Loader.jsm", {});
const {TargetFactory} = require("devtools/client/framework/target");
const {console} = Cu.import("resource://gre/modules/Console.jsm", {});
const promise = require("promise");
const {FileUtils} = Cu.import("resource://gre/modules/FileUtils.jsm", {});
const {NetUtil} = Cu.import("resource://gre/modules/NetUtil.jsm", {});
const ProjectEditor = require("devtools/client/projecteditor/lib/projecteditor");
const DevToolsUtils = require("devtools/shared/DevToolsUtils");

const TEST_URL_ROOT = "http://mochi.test:8888/browser/devtools/client/projecteditor/test/";
const SAMPLE_WEBAPP_URL = TEST_URL_ROOT + "/helper_homepage.html";
var TEMP_PATH;
var TEMP_FOLDER_NAME = "ProjectEditor" + (new Date().getTime());

// All test are asynchronous
waitForExplicitFinish();

// Uncomment this pref to dump all devtools emitted events to the console.
// Services.prefs.setBoolPref("devtools.dump.emit", true);

// Set the testing flag on DevToolsUtils and reset it when the test ends
DevToolsUtils.testing = true;
registerCleanupFunction(() => DevToolsUtils.testing = false);

// Clear preferences that may be set during the course of tests.
registerCleanupFunction(() => {
  // Services.prefs.clearUserPref("devtools.dump.emit");
  TEMP_PATH = null;
  TEMP_FOLDER_NAME = null;
});

// Auto close the toolbox and close the test tabs when the test ends
registerCleanupFunction(() => {
  try {
    let target = TargetFactory.forTab(gBrowser.selectedTab);
    gDevTools.closeToolbox(target);
  } catch (ex) {
    dump(ex);
  }
  while (gBrowser.tabs.length > 1) {
    gBrowser.removeCurrentTab();
  }
});

/**
 * Add a new test tab in the browser and load the given url.
 * @param {String} url The url to be loaded in the new tab
 * @return a promise that resolves to the tab object when the url is loaded
 */
function addTab(url) {
  info("Adding a new tab with URL: '" + url + "'");
  let def = promise.defer();

  let tab = gBrowser.selectedTab = gBrowser.addTab();
  gBrowser.selectedBrowser.addEventListener("load", function onload() {
    gBrowser.selectedBrowser.removeEventListener("load", onload, true);
    info("URL '" + url + "' loading complete");
    waitForFocus(() => {
      def.resolve(tab);
    }, content);
  }, true);
  content.location = url;

  return def.promise;
}

/**
 * Some tests may need to import one or more of the test helper scripts.
 * A test helper script is simply a js file that contains common test code that
 * is either not common-enough to be in head.js, or that is located in a separate
 * directory.
 * The script will be loaded synchronously and in the test's scope.
 * @param {String} filePath The file path, relative to the current directory.
 *                 Examples:
 *                 - "helper_attributes_test_runner.js"
 *                 - "../../../commandline/test/helpers.js"
 */
function loadHelperScript(filePath) {
  let testDir = gTestPath.substr(0, gTestPath.lastIndexOf("/"));
  Services.scriptloader.loadSubScript(testDir + "/" + filePath, this);
}

function addProjectEditorTabForTempDirectory(opts = {}) {
  try {
    TEMP_PATH = buildTempDirectoryStructure();
  } catch (e) {
    // Bug 1037292 - The test servers sometimes are unable to
    // write to the temporary directory due to locked files
    // or access denied errors.  Try again if this failed.
    info ("Project Editor temp directory creation failed.  Trying again.");
    TEMP_PATH = buildTempDirectoryStructure();
  }
  let customOpts = {
    name: "Test",
    iconUrl: "chrome://devtools/skin/images/tool-options.svg",
    projectOverviewURL: SAMPLE_WEBAPP_URL
  };

  info ("Adding a project editor tab for editing at: " + TEMP_PATH);
  return addProjectEditorTab(opts).then((projecteditor) => {
    return projecteditor.setProjectToAppPath(TEMP_PATH, customOpts).then(() => {
      return projecteditor;
    });
  });
}

function addProjectEditorTab(opts = {}) {
  return addTab("chrome://devtools/content/projecteditor/chrome/content/projecteditor-test.xul").then(() => {
    let iframe = content.document.getElementById("projecteditor-iframe");
    if (opts.menubar !== false) {
      opts.menubar = content.document.querySelector("menubar");
    }
    let projecteditor = ProjectEditor.ProjectEditor(iframe, opts);


    ok (iframe, "Tab has placeholder iframe for projecteditor");
    ok (projecteditor, "ProjectEditor has been initialized");

    return projecteditor.loaded.then((projecteditor) => {
      return projecteditor;
    });
  });
}

/**
 * Build a temporary directory as a workspace for this loader
 * https://developer.mozilla.org/en-US/Add-ons/Code_snippets/File_I_O
 */
function buildTempDirectoryStructure() {

  let dirName = TEMP_FOLDER_NAME;
  info ("Building a temporary directory at " + dirName);

  // First create (and remove) the temp dir to discard any changes
  let TEMP_DIR = FileUtils.getDir("TmpD", [dirName], true);
  TEMP_DIR.remove(true);

  // Now rebuild our fake project.
  TEMP_DIR = FileUtils.getDir("TmpD", [dirName], true);

  FileUtils.getDir("TmpD", [dirName, "css"], true);
  FileUtils.getDir("TmpD", [dirName, "data"], true);
  FileUtils.getDir("TmpD", [dirName, "img", "icons"], true);
  FileUtils.getDir("TmpD", [dirName, "js"], true);

  let htmlFile = FileUtils.getFile("TmpD", [dirName, "index.html"]);
  htmlFile.createUnique(Components.interfaces.nsIFile.NORMAL_FILE_TYPE, FileUtils.PERMS_FILE);
  writeToFileSync(htmlFile, [
    '<!DOCTYPE html>',
    '<html lang="en">',
    ' <head>',
    '   <meta charset="utf-8" />',
    '   <title>ProjectEditor Temp File</title>',
    '   <link rel="stylesheet" href="style.css" />',
    ' </head>',
    ' <body id="home">',
    '   <p>ProjectEditor Temp File</p>',
    ' </body>',
    '</html>'].join("\n")
  );

  let readmeFile = FileUtils.getFile("TmpD", [dirName, "README.md"]);
  readmeFile.createUnique(Components.interfaces.nsIFile.NORMAL_FILE_TYPE, FileUtils.PERMS_FILE);
  writeToFileSync(readmeFile, [
    '## Readme'
    ].join("\n")
  );

  let licenseFile = FileUtils.getFile("TmpD", [dirName, "LICENSE"]);
  licenseFile.createUnique(Components.interfaces.nsIFile.NORMAL_FILE_TYPE, FileUtils.PERMS_FILE);
  writeToFileSync(licenseFile, [
   '/* 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/. */'
    ].join("\n")
  );

  let cssFile = FileUtils.getFile("TmpD", [dirName, "css", "styles.css"]);
  cssFile.createUnique(Components.interfaces.nsIFile.NORMAL_FILE_TYPE, FileUtils.PERMS_FILE);
  writeToFileSync(cssFile, [
    'body {',
    ' background: red;',
    '}'
    ].join("\n")
  );

  FileUtils.getFile("TmpD", [dirName, "js", "script.js"]).createUnique(Components.interfaces.nsIFile.NORMAL_FILE_TYPE, FileUtils.PERMS_FILE);

  FileUtils.getFile("TmpD", [dirName, "img", "fake.png"]).createUnique(Components.interfaces.nsIFile.NORMAL_FILE_TYPE, FileUtils.PERMS_FILE);
  FileUtils.getFile("TmpD", [dirName, "img", "icons", "16x16.png"]).createUnique(Components.interfaces.nsIFile.NORMAL_FILE_TYPE, FileUtils.PERMS_FILE);
  FileUtils.getFile("TmpD", [dirName, "img", "icons", "32x32.png"]).createUnique(Components.interfaces.nsIFile.NORMAL_FILE_TYPE, FileUtils.PERMS_FILE);
  FileUtils.getFile("TmpD", [dirName, "img", "icons", "128x128.png"]).createUnique(Components.interfaces.nsIFile.NORMAL_FILE_TYPE, FileUtils.PERMS_FILE);
  FileUtils.getFile("TmpD", [dirName, "img", "icons", "vector.svg"]).createUnique(Components.interfaces.nsIFile.NORMAL_FILE_TYPE, FileUtils.PERMS_FILE);

  return TEMP_DIR.path;
}

// https://developer.mozilla.org/en-US/Add-ons/Code_snippets/File_I_O#Writing_to_a_file
function writeToFile(file, data) {
  if (typeof file === "string") {
    file = new FileUtils.File(file);
  }
  info("Writing to file: " + file.path + " (exists? " + file.exists() + ")");
  let defer = promise.defer();
  var ostream = FileUtils.openSafeFileOutputStream(file);

  var converter = Components.classes["@mozilla.org/intl/scriptableunicodeconverter"].
                  createInstance(Components.interfaces.nsIScriptableUnicodeConverter);
  converter.charset = "UTF-8";
  var istream = converter.convertToInputStream(data);

  // The last argument (the callback) is optional.
  NetUtil.asyncCopy(istream, ostream, function(status) {
    if (!Components.isSuccessCode(status)) {
      // Handle error!
      info("ERROR WRITING TEMP FILE", status);
    }
    defer.resolve();
  });
  return defer.promise;
}

// This is used when setting up the test.
// You should typically use the async version of this, writeToFile.
// https://developer.mozilla.org/en-US/Add-ons/Code_snippets/File_I_O#More
function writeToFileSync(file, data) {
  // file is nsIFile, data is a string
  var foStream = Components.classes["@mozilla.org/network/file-output-stream;1"].
                 createInstance(Components.interfaces.nsIFileOutputStream);

  // use 0x02 | 0x10 to open file for appending.
  foStream.init(file, 0x02 | 0x08 | 0x20, 0666, 0);
  // write, create, truncate
  // In a c file operation, we have no need to set file mode with or operation,
  // directly using "r" or "w" usually.

  // if you are sure there will never ever be any non-ascii text in data you can
  // also call foStream.write(data, data.length) directly
  var converter = Components.classes["@mozilla.org/intl/converter-output-stream;1"].
                  createInstance(Components.interfaces.nsIConverterOutputStream);
  converter.init(foStream, "UTF-8", 0, 0);
  converter.writeString(data);
  converter.close(); // this closes foStream
}

function getTempFile(path) {
  let parts = [TEMP_FOLDER_NAME];
  parts = parts.concat(path.split("/"));
  return FileUtils.getFile("TmpD", parts);
}

// https://developer.mozilla.org/en-US/Add-ons/Code_snippets/File_I_O#Writing_to_a_file
function* getFileData(file) {
  if (typeof file === "string") {
    file = new FileUtils.File(file);
  }
  let def = promise.defer();

  NetUtil.asyncFetch({
    uri: NetUtil.newURI(file),
    loadUsingSystemPrincipal: true
  }, function(inputStream, status) {
    if (!Components.isSuccessCode(status)) {
      info("ERROR READING TEMP FILE", status);
    }

    // Detect if an empty file is loaded
    try {
      inputStream.available();
    } catch(e) {
      def.resolve("");
      return;
    }

    var data = NetUtil.readInputStreamToString(inputStream, inputStream.available());
    def.resolve(data);
  });

  return def.promise;
}

function onceEditorCreated(projecteditor) {
  let def = promise.defer();
  projecteditor.once("onEditorCreated", (editor) => {
    def.resolve(editor);
  });
  return def.promise;
}

function onceEditorLoad(projecteditor) {
  let def = promise.defer();
  projecteditor.once("onEditorLoad", (editor) => {
    def.resolve(editor);
  });
  return def.promise;
}

function onceEditorActivated(projecteditor) {
  let def = promise.defer();
  projecteditor.once("onEditorActivated", (editor) => {
    def.resolve(editor);
  });
  return def.promise;
}

function onceEditorSave(projecteditor) {
  let def = promise.defer();
  projecteditor.once("onEditorSave", (editor, resource) => {
    def.resolve(resource);
  });
  return def.promise;
}

function onPopupShow(menu) {
  let defer = promise.defer();
  menu.addEventListener("popupshown", function onpopupshown() {
    menu.removeEventListener("popupshown", onpopupshown);
    defer.resolve();
  });
  return defer.promise;
}

function onPopupHidden(menu) {
  let defer = promise.defer();
  menu.addEventListener("popuphidden", function onpopuphidden() {
    menu.removeEventListener("popuphidden", onpopuphidden);
    defer.resolve();
  });
  return defer.promise;
}
