/* 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/>. */

/*
 * Finds the hidden tabs by comparing the tabs' top offset.
 * hidden tabs will have a great top offset.
 *
 * @param sourceTabs Array
 * @param sourceTabEls HTMLCollection
 *
 * @returns Array
 */

export function getHiddenTabs(sourceTabs, sourceTabEls) {
  sourceTabEls = [].slice.call(sourceTabEls);
  function getTopOffset() {
    const topOffsets = sourceTabEls.map(t => t.getBoundingClientRect().top);
    return Math.min(...topOffsets);
  }

  function hasTopOffset(el) {
    // adding 10px helps account for cases where the tab might be offset by
    // styling such as selected tabs which don't have a border.
    const tabTopOffset = getTopOffset();
    return el.getBoundingClientRect().top > tabTopOffset + 10;
  }

  return sourceTabs.filter((tab, index) => {
    const element = sourceTabEls[index];
    return element && hasTopOffset(element);
  });
}

export function getTabMenuItems() {
  return {
    closeTab: {
      id: "node-menu-close-tab",
      label: L10N.getStr("sourceTabs.closeTab"),
      accesskey: L10N.getStr("sourceTabs.closeTab.accesskey"),
      disabled: false,
    },
    closeOtherTabs: {
      id: "node-menu-close-other-tabs",
      label: L10N.getStr("sourceTabs.closeOtherTabs"),
      accesskey: L10N.getStr("sourceTabs.closeOtherTabs.accesskey"),
      disabled: false,
    },
    closeTabsToEnd: {
      id: "node-menu-close-tabs-to-end",
      label: L10N.getStr("sourceTabs.closeTabsToEnd"),
      accesskey: L10N.getStr("sourceTabs.closeTabsToEnd.accesskey"),
      disabled: false,
    },
    closeAllTabs: {
      id: "node-menu-close-all-tabs",
      label: L10N.getStr("sourceTabs.closeAllTabs"),
      accesskey: L10N.getStr("sourceTabs.closeAllTabs.accesskey"),
      disabled: false,
    },
    showSource: {
      id: "node-menu-show-source",
      label: L10N.getStr("sourceTabs.revealInTree"),
      accesskey: L10N.getStr("sourceTabs.revealInTree.accesskey"),
      disabled: false,
    },
    copySource: {
      id: "node-menu-copy-source",
      label: L10N.getStr("copySource.label"),
      accesskey: L10N.getStr("copySource.accesskey"),
      disabled: false,
    },
    copySourceUri2: {
      id: "node-menu-copy-source-url",
      label: L10N.getStr("copySourceUri2"),
      accesskey: L10N.getStr("copySourceUri2.accesskey"),
      disabled: false,
    },
    toggleBlackBox: {
      id: "node-menu-blackbox",
      label: L10N.getStr("ignoreContextItem.ignore"),
      accesskey: L10N.getStr("ignoreContextItem.ignore.accesskey"),
      disabled: false,
    },
    prettyPrint: {
      id: "node-menu-pretty-print",
      label: L10N.getStr("sourceTabs.prettyPrint"),
      accesskey: L10N.getStr("sourceTabs.prettyPrint.accesskey"),
      disabled: false,
    },
  };
}

/**
 * Determines if a tab exists with the following properties
 *
 * @param {Object} tab
 * @param {String} url
 * @param {Boolean} isOriginal
 */
export function isSimilarTab(tab, url, isOriginal) {
  return tab.url === url && tab.isOriginal === isOriginal;
}

/**
 * This cleans up some tab info (source id and thread info),
 * mostly for persiting to pref and for navigation or reload.
 * This is neccesary because the source and thread are destroyed
 * and re-created across navigations / reloads.
 *
 * @param {Array} tabs
 */
export function persistTabs(tabs) {
  return [...tabs]
    .filter(tab => tab.url)
    .map(tab => ({
      ...tab,
      source: null,
      sourceActor: null,
    }));
}
