/* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
/* vim: set sts=2 sw=2 et tw=80: */
"use strict";

XPCOMUtils.defineLazyModuleGetter(this, "AddonManager",
                                  "resource://gre/modules/AddonManager.jsm");
XPCOMUtils.defineLazyModuleGetter(this, "ExtensionSettingsStore",
                                  "resource://gre/modules/ExtensionSettingsStore.jsm");

const {
  createAppInfo,
  promiseShutdownManager,
  promiseStartupManager,
} = AddonTestUtils;

AddonTestUtils.init(this);

// Allow for unsigned addons.
AddonTestUtils.overrideCertDB();

createAppInfo("xpcshell@tests.mozilla.org", "XPCShell", "1", "42");

const ITEMS = {
  key1: [
    {key: "key1", value: "val1", id: "@first"},
    {key: "key1", value: "val2", id: "@second"},
    {key: "key1", value: "val3", id: "@third"},
  ],
  key2: [
    {key: "key2", value: "val1-2", id: "@first"},
    {key: "key2", value: "val2-2", id: "@second"},
    {key: "key2", value: "val3-2", id: "@third"},
  ],
};
const KEY_LIST = Object.keys(ITEMS);
const TEST_TYPE = "myType";

let callbackCount = 0;

function initialValue(key) {
  callbackCount++;
  return `key:${key}`;
}

add_task(async function test_settings_store() {
  await promiseStartupManager();

  // Create an array of test framework extension wrappers to install.
  let testExtensions = [
    ExtensionTestUtils.loadExtension({
      useAddonManager: "temporary",
      manifest: {
        applications: {gecko: {id: "@first"}},
      },
    }),
    ExtensionTestUtils.loadExtension({
      useAddonManager: "temporary",
      manifest: {
        applications: {gecko: {id: "@second"}},
      },
    }),
    ExtensionTestUtils.loadExtension({
      useAddonManager: "temporary",
      manifest: {
        applications: {gecko: {id: "@third"}},
      },
    }),
  ];

  for (let extension of testExtensions) {
    await extension.startup();
  }

  // Create an array actual Extension objects which correspond to the
  // test framework extension wrappers.
  let extensions = testExtensions.map(extension => extension.extension);

  let expectedCallbackCount = 0;

  await Assert.rejects(
  ExtensionSettingsStore.getLevelOfControl(
    1, TEST_TYPE, "key"),
  /The ExtensionSettingsStore was accessed before the initialize promise resolved/,
  "Accessing the SettingsStore before it is initialized throws an error.");

  // Initialize the SettingsStore.
  await ExtensionSettingsStore.initialize();

  // Add a setting for the second oldest extension, where it is the only setting for a key.
  for (let key of KEY_LIST) {
    let extensionIndex = 1;
    let itemToAdd = ITEMS[key][extensionIndex];
    let levelOfControl = await ExtensionSettingsStore.getLevelOfControl(extensions[extensionIndex], TEST_TYPE, key);
    equal(
      levelOfControl,
      "controllable_by_this_extension",
      "getLevelOfControl returns correct levelOfControl with no settings set for a key.");
    let item = await ExtensionSettingsStore.addSetting(
      extensions[extensionIndex], TEST_TYPE, itemToAdd.key, itemToAdd.value, initialValue);
    expectedCallbackCount++;
    equal(callbackCount,
      expectedCallbackCount,
      "initialValueCallback called the expected number of times.");
    deepEqual(item, itemToAdd, "Adding initial item for a key returns that item.");
    item = await ExtensionSettingsStore.getSetting(TEST_TYPE, key);
    deepEqual(
      item,
      itemToAdd,
      "getSetting returns correct item with only one item in the list.");
    levelOfControl = await ExtensionSettingsStore.getLevelOfControl(extensions[extensionIndex], TEST_TYPE, key);
    equal(
      levelOfControl,
      "controlled_by_this_extension",
      "getLevelOfControl returns correct levelOfControl with only one item in the list.");
    ok(ExtensionSettingsStore.hasSetting(extensions[extensionIndex], TEST_TYPE, key),
       "hasSetting returns the correct value when an extension has a setting set.");
  }

  // Add a setting for the oldest extension.
  for (let key of KEY_LIST) {
    let extensionIndex = 0;
    let itemToAdd = ITEMS[key][extensionIndex];
    let item = await ExtensionSettingsStore.addSetting(
      extensions[extensionIndex], TEST_TYPE, itemToAdd.key, itemToAdd.value, initialValue);
    equal(callbackCount,
      expectedCallbackCount,
      "initialValueCallback called the expected number of times.");
    equal(item, null, "An older extension adding a setting for a key returns null");
    item = await ExtensionSettingsStore.getSetting(TEST_TYPE, key);
    deepEqual(
      item,
      ITEMS[key][1],
      "getSetting returns correct item with more than one item in the list.");
    let levelOfControl = await ExtensionSettingsStore.getLevelOfControl(extensions[extensionIndex], TEST_TYPE, key);
    equal(
      levelOfControl,
      "controlled_by_other_extensions",
      "getLevelOfControl returns correct levelOfControl when another extension is in control.");
  }

  // Reload the settings store to emulate a browser restart.
  await ExtensionSettingsStore._reloadFile();

  // Add a setting for the newest extension.
  for (let key of KEY_LIST) {
    let extensionIndex = 2;
    let itemToAdd = ITEMS[key][extensionIndex];
    let levelOfControl = await ExtensionSettingsStore.getLevelOfControl(extensions[extensionIndex], TEST_TYPE, key);
    equal(
      levelOfControl,
      "controllable_by_this_extension",
      "getLevelOfControl returns correct levelOfControl for a more recent extension.");
    let item = await ExtensionSettingsStore.addSetting(
      extensions[extensionIndex], TEST_TYPE, itemToAdd.key, itemToAdd.value, initialValue);
    equal(callbackCount,
      expectedCallbackCount,
      "initialValueCallback called the expected number of times.");
    deepEqual(item, itemToAdd, "Adding item for most recent extension returns that item.");
    item = await ExtensionSettingsStore.getSetting(TEST_TYPE, key);
    deepEqual(
      item,
      ITEMS[key][2],
      "getSetting returns correct item with more than one item in the list.");
    levelOfControl = await ExtensionSettingsStore.getLevelOfControl(extensions[extensionIndex], TEST_TYPE, key);
    equal(
      levelOfControl,
      "controlled_by_this_extension",
      "getLevelOfControl returns correct levelOfControl when this extension is in control.");
  }

  for (let extension of extensions) {
    let items = await ExtensionSettingsStore.getAllForExtension(extension, TEST_TYPE);
    deepEqual(items, KEY_LIST, "getAllForExtension returns expected keys.");
  }

  // Attempting to remove a setting that has not been set should *not* throw an exception.
  let removeResult = await ExtensionSettingsStore.removeSetting(extensions[0], "myType", "unset_key");
  equal(removeResult, null, "Removing a setting that was not previously set returns null.");

  // Attempting to disable a setting that has not been set should throw an exception.
  Assert.throws(() => ExtensionSettingsStore.disable(extensions[0], "myType", "unset_key"),
                /Cannot alter the setting for myType:unset_key as it does not exist/,
                "disable rejects with an unset key.");

  // Attempting to enable a setting that has not been set should throw an exception.
  Assert.throws(() => ExtensionSettingsStore.enable(extensions[0], "myType", "unset_key"),
                /Cannot alter the setting for myType:unset_key as it does not exist/,
                "enable rejects with an unset key.");

  let expectedKeys = KEY_LIST;
  // Disable the non-top item for a key.
  for (let key of KEY_LIST) {
    let extensionIndex = 0;
    let item = await ExtensionSettingsStore.addSetting(
      extensions[extensionIndex], TEST_TYPE, key, "new value", initialValue);
    equal(callbackCount,
      expectedCallbackCount,
      "initialValueCallback called the expected number of times.");
    equal(item, null, "Updating non-top item for a key returns null");
    item = await ExtensionSettingsStore.disable(extensions[extensionIndex], TEST_TYPE, key);
    equal(item, null, "Disabling non-top item for a key returns null.");
    let allForExtension = await ExtensionSettingsStore.getAllForExtension(extensions[extensionIndex], TEST_TYPE);
    deepEqual(allForExtension, expectedKeys, "getAllForExtension returns expected keys after a disable.");
    item = await ExtensionSettingsStore.getSetting(TEST_TYPE, key);
    deepEqual(
      item,
      ITEMS[key][2],
      "getSetting returns correct item after a disable.");
    let levelOfControl = await ExtensionSettingsStore.getLevelOfControl(extensions[extensionIndex], TEST_TYPE, key);
    equal(
      levelOfControl,
      "controlled_by_other_extensions",
      "getLevelOfControl returns correct levelOfControl after disabling of non-top item.");
  }

  // Re-enable the non-top item for a key.
  for (let key of KEY_LIST) {
    let extensionIndex = 0;
    let item = await ExtensionSettingsStore.enable(extensions[extensionIndex], TEST_TYPE, key);
    equal(item, null, "Enabling non-top item for a key returns null.");
    let allForExtension = await ExtensionSettingsStore.getAllForExtension(extensions[extensionIndex], TEST_TYPE);
    deepEqual(allForExtension, expectedKeys, "getAllForExtension returns expected keys after an enable.");
    item = await ExtensionSettingsStore.getSetting(TEST_TYPE, key);
    deepEqual(
      item,
      ITEMS[key][2],
      "getSetting returns correct item after an enable.");
    let levelOfControl = await ExtensionSettingsStore.getLevelOfControl(extensions[extensionIndex], TEST_TYPE, key);
    equal(
      levelOfControl,
      "controlled_by_other_extensions",
      "getLevelOfControl returns correct levelOfControl after enabling of non-top item.");
  }

  // Remove the non-top item for a key.
  for (let key of KEY_LIST) {
    let extensionIndex = 0;
    let item = await ExtensionSettingsStore.removeSetting(extensions[extensionIndex], TEST_TYPE, key);
    equal(item, null, "Removing non-top item for a key returns null.");
    expectedKeys = expectedKeys.filter(expectedKey => expectedKey != key);
    let allForExtension = await ExtensionSettingsStore.getAllForExtension(extensions[extensionIndex], TEST_TYPE);
    deepEqual(allForExtension, expectedKeys, "getAllForExtension returns expected keys after a removal.");
    item = await ExtensionSettingsStore.getSetting(TEST_TYPE, key);
    deepEqual(
      item,
      ITEMS[key][2],
      "getSetting returns correct item after a removal.");
    let levelOfControl = await ExtensionSettingsStore.getLevelOfControl(extensions[extensionIndex], TEST_TYPE, key);
    equal(
      levelOfControl,
      "controlled_by_other_extensions",
      "getLevelOfControl returns correct levelOfControl after removal of non-top item.");
    ok(!ExtensionSettingsStore.hasSetting(extensions[extensionIndex], TEST_TYPE, key),
       "hasSetting returns the correct value when an extension does not have a setting set.");
  }

  for (let key of KEY_LIST) {
    // Disable the top item for a key.
    let item = await ExtensionSettingsStore.disable(extensions[2], TEST_TYPE, key);
    deepEqual(
      item,
      ITEMS[key][1],
      "Disabling top item for a key returns the new top item.");
    item = await ExtensionSettingsStore.getSetting(TEST_TYPE, key);
    deepEqual(
      item,
      ITEMS[key][1],
      "getSetting returns correct item after a disable.");
    let levelOfControl = await ExtensionSettingsStore.getLevelOfControl(extensions[2], TEST_TYPE, key);
    equal(
      levelOfControl,
      "controllable_by_this_extension",
      "getLevelOfControl returns correct levelOfControl after disabling of top item.");

    // Re-enable the top item for a key.
    item = await ExtensionSettingsStore.enable(extensions[2], TEST_TYPE, key);
    deepEqual(
      item,
      ITEMS[key][2],
      "Re-enabling top item for a key returns the old top item.");
    item = await ExtensionSettingsStore.getSetting(TEST_TYPE, key);
    deepEqual(
      item,
      ITEMS[key][2],
      "getSetting returns correct item after an enable.");
    levelOfControl = await ExtensionSettingsStore.getLevelOfControl(extensions[2], TEST_TYPE, key);
    equal(
      levelOfControl,
      "controlled_by_this_extension",
      "getLevelOfControl returns correct levelOfControl after re-enabling top item.");

    // Remove the top item for a key.
    item = await ExtensionSettingsStore.removeSetting(extensions[2], TEST_TYPE, key);
    deepEqual(
      item,
      ITEMS[key][1],
      "Removing top item for a key returns the new top item.");
    item = await ExtensionSettingsStore.getSetting(TEST_TYPE, key);
    deepEqual(
      item,
      ITEMS[key][1],
      "getSetting returns correct item after a removal.");
    levelOfControl = await ExtensionSettingsStore.getLevelOfControl(extensions[2], TEST_TYPE, key);
    equal(
      levelOfControl,
      "controllable_by_this_extension",
      "getLevelOfControl returns correct levelOfControl after removal of top item.");

    // Add a setting for the current top item.
    let itemToAdd = {key, value: `new-${key}`, id: "@second"};
    item = await ExtensionSettingsStore.addSetting(
      extensions[1], TEST_TYPE, itemToAdd.key, itemToAdd.value, initialValue);
    equal(callbackCount,
      expectedCallbackCount,
      "initialValueCallback called the expected number of times.");
    deepEqual(
      item,
      itemToAdd,
      "Updating top item for a key returns that item.");
    item = await ExtensionSettingsStore.getSetting(TEST_TYPE, key);
    deepEqual(
      item,
      itemToAdd,
      "getSetting returns correct item after updating.");
    levelOfControl = await ExtensionSettingsStore.getLevelOfControl(extensions[1], TEST_TYPE, key);
    equal(
      levelOfControl,
      "controlled_by_this_extension",
      "getLevelOfControl returns correct levelOfControl after updating.");

    // Disable the last remaining item for a key.
    let expectedItem = {key, initialValue: initialValue(key)};
    // We're using the callback to set the expected value, so we need to increment the
    // expectedCallbackCount.
    expectedCallbackCount++;
    item = await ExtensionSettingsStore.disable(extensions[1], TEST_TYPE, key);
    deepEqual(
      item,
      expectedItem,
      "Disabling last item for a key returns the initial value.");
    item = await ExtensionSettingsStore.getSetting(TEST_TYPE, key);
    deepEqual(
      item,
      expectedItem,
      "getSetting returns the initial value after all are disabled.");
    levelOfControl = await ExtensionSettingsStore.getLevelOfControl(extensions[1], TEST_TYPE, key);
    equal(
      levelOfControl,
      "controllable_by_this_extension",
      "getLevelOfControl returns correct levelOfControl after all are disabled.");

    // Re-enable the last remaining item for a key.
    item = await ExtensionSettingsStore.enable(extensions[1], TEST_TYPE, key);
    deepEqual(
      item,
      itemToAdd,
      "Re-enabling last item for a key returns the old value.");
    item = await ExtensionSettingsStore.getSetting(TEST_TYPE, key);
    deepEqual(
      item,
      itemToAdd,
      "getSetting returns expected value after re-enabling.");
    levelOfControl = await ExtensionSettingsStore.getLevelOfControl(extensions[1], TEST_TYPE, key);
    equal(
      levelOfControl,
      "controlled_by_this_extension",
      "getLevelOfControl returns correct levelOfControl after re-enabling.");

    // Remove the last remaining item for a key.
    item = await ExtensionSettingsStore.removeSetting(extensions[1], TEST_TYPE, key);
    deepEqual(
      item,
      expectedItem,
      "Removing last item for a key returns the initial value.");
    item = await ExtensionSettingsStore.getSetting(TEST_TYPE, key);
    deepEqual(
      item,
      null,
      "getSetting returns null after all are removed.");
    levelOfControl = await ExtensionSettingsStore.getLevelOfControl(extensions[1], TEST_TYPE, key);
    equal(
      levelOfControl,
      "controllable_by_this_extension",
      "getLevelOfControl returns correct levelOfControl after all are removed.");

    // Attempting to remove a setting that has had all extensions removed should *not* throw an exception.
    removeResult = await ExtensionSettingsStore.removeSetting(extensions[1], TEST_TYPE, key);
    equal(removeResult, null, "Removing a setting that has had all extensions removed returns null.");
  }

  // Test adding a setting with a value in callbackArgument.
  let extensionIndex = 0;
  let testKey = "callbackArgumentKey";
  let callbackArgumentValue = Date.now();
  // Add the setting.
  let item = await ExtensionSettingsStore.addSetting(
    extensions[extensionIndex], TEST_TYPE, testKey, 1, initialValue, callbackArgumentValue);
  expectedCallbackCount++;
  equal(callbackCount,
    expectedCallbackCount,
    "initialValueCallback called the expected number of times.");
  // Remove the setting which should return the initial value.
  let expectedItem = {key: testKey, initialValue: initialValue(callbackArgumentValue)};
  // We're using the callback to set the expected value, so we need to increment the
  // expectedCallbackCount.
  expectedCallbackCount++;
  item = await ExtensionSettingsStore.removeSetting(extensions[extensionIndex], TEST_TYPE, testKey);
  deepEqual(
    item,
    expectedItem,
    "Removing last item for a key returns the initial value.");
  item = await ExtensionSettingsStore.getSetting(TEST_TYPE, testKey);
  deepEqual(
    item,
    null,
    "getSetting returns null after all are removed.");

  item = await ExtensionSettingsStore.getSetting(TEST_TYPE, "not a key");
  equal(
    item,
    null,
    "getSetting returns a null item if the setting does not have any records.");
  let levelOfControl = await ExtensionSettingsStore.getLevelOfControl(extensions[1], TEST_TYPE, "not a key");
  equal(
    levelOfControl,
    "controllable_by_this_extension",
    "getLevelOfControl returns correct levelOfControl if the setting does not have any records.");

  for (let extension of testExtensions) {
    await extension.unload();
  }

  await promiseShutdownManager();
});

add_task(async function test_exceptions() {
  await ExtensionSettingsStore.initialize();

  await Assert.rejects(
    ExtensionSettingsStore.addSetting(
      1, TEST_TYPE, "key_not_a_function", "val1", "not a function"),
    /initialValueCallback must be a function/,
    "addSetting rejects with a callback that is not a function.");
});
