/* ***** BEGIN LICENSE BLOCK ***** 
 * Version: MPL 1.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is the Tree Style Tab.
 *
 * The Initial Developer of the Original Code is YUKI "Piro" Hiroshi.
 * Portions created by the Initial Developer are Copyright (C) 2011-2024
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s): YUKI "Piro" Hiroshi <piro.outsider.reflex@gmail.com>
 *                 wanabe <https://github.com/wanabe>
 *                 Tetsuharu OHZEKI <https://github.com/saneyuki>
 *                 Xidorn Quan <https://github.com/upsuper> (Firefox 40+ support)
 *                 lv7777 (https://github.com/lv7777)
 *
 * ***** END LICENSE BLOCK ******/
'use strict';

import EventListenerManager from '/extlib/EventListenerManager.js';

import {
  log as internalLogger,
  configs,
  tryRevokeObjectURL,
} from '/common/common.js';
import * as ApiTabs from '/common/api-tabs.js';
import * as Constants from '/common/constants.js';
import * as SidebarConnection from '/common/sidebar-connection.js';
import * as TabsStore from '/common/tabs-store.js';

import { Tab } from '/common/TreeItem.js';

import * as TabsMove from './tabs-move.js';
import * as Tree from './tree.js';

export const onForbiddenURLRequested = new EventListenerManager();

function log(...args) {
  internalLogger('background/tabs-open', ...args);
}

const SEARCH_PREFIX_MATCHER = /^(ext\+ws:search:|about:ws-search\?)/;

export async function loadURI(uri, options = {}) {
  if (!options.windowId && !options.tab)
    throw new Error('missing loading target window or tab');
  try {
    let tabId;
    if (options.tab) {
      tabId = options.tab.id;
    }
    else {
      let tabs = await browser.tabs.query({
        windowId: options.windowId,
        active:   true
      }).catch(ApiTabs.createErrorHandler());
      if (tabs.length == 0)
        tabs = await browser.tabs.query({
          windowId: options.windowId,
        }).catch(ApiTabs.createErrorHandler());
      tabId = tabs[0].id;
    }
    let searchQuery = null;
    if (SEARCH_PREFIX_MATCHER.test(uri)) {
      const query = uri.replace(SEARCH_PREFIX_MATCHER, '');
      if (browser.search &&
          typeof browser.search.search == 'function')
        searchQuery = query;
      else
        uri = configs.defaultSearchEngine.replace(/%s/gi, query);
    }
    if (searchQuery) {
      await browser.search.search({
        query: searchQuery,
        tabId
      }).catch(ApiTabs.createErrorHandler(ApiTabs.handleMissingTabError));
    }
    else {
      await browser.tabs.update(tabId, {
        url: sanitizeURL(uri),
      }).catch(ApiTabs.createErrorHandler(ApiTabs.handleMissingTabError));
    }
  }
  catch(e) {
    ApiTabs.handleMissingTabError(e);
  }
}

export async function openNewTab(options = {}) {
  const win = TabsStore.windows.get(options.windowId);
  win.toBeOpenedNewTabCommandTab++;
  return openURIInTab(options.url || options.uri || null, options);
}

export async function openURIInTab(uri, options = {}) {
  const tabs = await openURIsInTabs([uri], options);
  return tabs[0];
}

const FORBIDDEN_URL_MATCHER = /^(about|chrome|resource|file):/;
const ALLOWED_URL_MATCHER = /^about:blank(\?|$)/;

export async function openURIsInTabs(uris, { windowId, insertBefore, insertAfter, cookieStoreId, isOrphan, active, inBackground, discarded, opener, parent, fixPositions } = {}) {
  log('openURIsInTabs: ', { uris, windowId, insertBefore, insertAfter, cookieStoreId, isOrphan, active, inBackground, discarded, opener, parent, fixPositions });
  if (!windowId)
    throw new Error('missing loading target window\n' + new Error().stack);

  const tabs = [];
  // Don't return the result of Tab.doAndGetNewTabs because their order can
  // be inverted due to browser.tabs.insertAfterCurrent=true
  const actuallyOpenedTabIds = new Set(await Tab.doAndGetNewTabs(async () => {
    await Tab.waitUntilTrackedAll(windowId);
    await TabsMove.waitUntilSynchronized(windowId);
    const startIndex = Tab.calculateNewTabIndex({ insertAfter, insertBefore });
    log('startIndex: ', startIndex);
    const win = TabsStore.windows.get(windowId);
    if (insertBefore ||
        insertAfter ||
        uris.some(uri => uri && typeof uri == 'object' && 'index' in uri))
      win.toBeOpenedTabsWithPositions += uris.length;
    if (cookieStoreId)
      win.toBeOpenedTabsWithCookieStoreId += uris.length;
    if (isOrphan)
      win.toBeOpenedOrphanTabs += uris.length;
    return Promise.all(uris.map(async (uri, index) => {
      const params = {
        windowId,
        active: index == 0 && (active || (inBackground === false)),
      };
      if (uri && typeof uri == 'object') { // tabs.create() compatible
        if ('active' in uri)
          params.active = uri.active;
        if ('cookieStoreId' in uri)
          params.cookieStoreId = uri.cookieStoreId;
        if ('discarded' in uri)
          params.discarded = uri.discarded;
        if ('index' in uri)
          params.index = uri.index;
        if ('openerTabId' in uri)
          params.openerTabId = uri.openerTabId;
        if ('openInReaderMode' in uri)
          params.openInReaderMode = uri.openInReaderMode;
        if ('pinned' in uri)
          params.pinned = uri.pinned;
        if ('selected' in uri)
          params.active = uri.selected;
        if ('title' in uri)
          params.title = uri.title;
        uri = uri.uri || uri.url;
      }
      let searchQuery = null;
      if (uri) {
        if (SEARCH_PREFIX_MATCHER.test(uri)) {
          const query = uri.replace(SEARCH_PREFIX_MATCHER, '');
          if (browser.search &&
              typeof browser.search.search == 'function')
            searchQuery = query;
          else
            params.url = configs.defaultSearchEngine.replace(/%s/gi, query);
        }
        else {
          params.url = uri;
        }
      }
      if (discarded &&
          !params.active &&
          !('discarded' in params))
        params.discarded = true;
      if (params.url == 'about:newtab')
        delete params.url
      if (params.url)
        params.url = sanitizeURL(params.url);
      if (!('url' in params /* about:newtab case */) ||
          /^about:/.test(params.url))
        params.discarded = false; // discarded tab cannot be opened with any about: URL
      if (!params.discarded) // title cannot be set for non-discarded tabs
        params.title = null;
      if (opener && !params.openerTabId)
        params.openerTabId = opener.id;
      if (startIndex > -1 && !('index' in params))
        params.index = startIndex + index;
      if (cookieStoreId && !params.cookieStoreId)
        params.cookieStoreId = cookieStoreId;
        // Tabs opened with different container can take time to be tracked,
        // then TabsStore.waitUntilTabsAreCreated() may be resolved before it is
        // tracked like as "the tab is already closed". So we wait until the
        // tab is correctly tracked.
      const promisedNewTabTracked = new Promise((resolve, reject) => {
        const listener = (tab) => {
          Tab.onCreating.removeListener(listener);
          browser.tabs.get(tab.id)
            .then(resolve)
            .catch(ApiTabs.createErrorSuppressor(reject));
        };
        Tab.onCreating.addListener(listener);
      });
      const createdTab = await browser.tabs.create(params).catch(ApiTabs.createErrorHandler());
      await Promise.all([
        promisedNewTabTracked, // TabsStore.waitUntilTabsAreCreated(createdTab.id),
        searchQuery && browser.search.search({
          query: searchQuery,
          tabId: createdTab.id
        }).catch(ApiTabs.createErrorHandler())
      ]);
      const tab = Tab.get(createdTab.id);
      log('created tab: ', tab);
      if (!tab)
        throw new Error('tab is already closed');
      if (!opener &&
          parent &&
          !isOrphan)
        await Tree.attachTabTo(tab, parent, {
          insertBefore: insertBefore,
          insertAfter:  insertAfter,
          forceExpand:  params.active,
          broadcast:    true
        });
      else if (insertBefore)
        await TabsMove.moveTabInternallyBefore(tab, insertBefore, {
          broadcast: true
        });
      else if (insertAfter)
        await TabsMove.moveTabInternallyAfter(tab, insertAfter, {
          broadcast: true
        });
      log('tab is opened.');
      await tab.$TST.opened;
      tabs.push(tab);
      tryRevokeObjectURL(tab.url);
      return tab;
    }));
  }, windowId));
  const openedTabs = tabs.filter(tab => actuallyOpenedTabIds.has(tab));

  if (fixPositions &&
      openedTabs.every((tab, index) => (index == 0) || (openedTabs[index-1].index - tab.index) == 1)) {
    // tabs are opened with reversed order due to browser.tabs.insertAfterCurrent=true
    let lastTab;
    for (const tab of openedTabs.slice(0).reverse()) {
      if (lastTab)
        TabsMove.moveTabInternallyBefore(tab, lastTab);
      lastTab = tab;
    }
    await TabsMove.waitUntilSynchronized(windowId);
  }
  return openedTabs;
}

function sanitizeURL(url) {
  if (ALLOWED_URL_MATCHER.test(url))
    return url;

  // tabs.create() doesn't accept about:reader URLs so we fallback them to regular URLs.
  if (/^about:reader\?/.test(url))
    return (new URL(url)).searchParams.get('url') || 'about:blank';

  if (FORBIDDEN_URL_MATCHER.test(url)) {
    onForbiddenURLRequested.dispatch(url);
    return `about:blank?forbidden-url=${url}`;
  }

  return url;
}

export function isOpenable(url) {
  return !url || url == sanitizeURL(url);
}


function onMessage(message, openerTab) {
  switch (message.type) {
    case Constants.kCOMMAND_LOAD_URI:
      loadURI(message.uri, {
        tab: Tab.get(message.tabId)
      });
      break;

    case Constants.kCOMMAND_OPEN_TAB:
      if (!message.parentId && openerTab)
        message.parentId = openerTab.id;
      if (!message.windowId && openerTab)
        message.windowId = openerTab.windowId;
      Tab.waitUntilTracked([
        message.parentId,
        message.insertBeforeId,
        message.insertAfterId
      ]).then(() => {
        openURIsInTabs(message.uris || [message.uri], {
          windowId:     message.windowId,
          parent:       Tab.get(message.parentId),
          insertBefore: Tab.get(message.insertBeforeId),
          insertAfter:  Tab.get(message.insertAfterId),
          active:       !!message.active,
          discarded:    message.discarded,
        });
      });
      break;

    case Constants.kCOMMAND_NEW_TABS:
      Tab.waitUntilTracked([
        message.openerId,
        message.parentId,
        message.insertBeforeId,
        message.insertAfterId
      ]).then(() => {
        log('new tabs requested: ', message);
        openURIsInTabs(message.uris, {
          windowId:     message.windowId,
          opener:       Tab.get(message.openerId),
          parent:       Tab.get(message.parentId),
          insertBefore: Tab.get(message.insertBeforeId),
          insertAfter:  Tab.get(message.insertAfterId),
          active:       message.active,
          discarded:    message.discarded,
        });
      });
      break;
  }
}

SidebarConnection.onMessage.addListener((windowId, message) => {
  onMessage(message);
});

browser.runtime.onMessage.addListener((message, sender) => {
  if (!message ||
      typeof message.type != 'string' ||
      message.type.indexOf('ws:') != 0)
    return;

  onMessage(message, sender.tab);
});