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

add_task(async function moveMultiple() {
  let tabs = [];
  for (let k of [1, 2, 3, 4]) {
    let tab = await BrowserTestUtils.openNewForegroundTab(
      window.gBrowser,
      `http://example.com/?${k}`
    );
    tabs.push(tab);
  }

  let extension = ExtensionTestUtils.loadExtension({
    manifest: { permissions: ["tabs"] },
    background: async function () {
      function num(url) {
        return parseInt(url.slice(-1), 10);
      }

      async function check(expected) {
        let tabs = await browser.tabs.query({ url: "http://example.com/*" });
        let endings = tabs.map(tab => num(tab.url));
        browser.test.assertTrue(
          expected.every((v, i) => v === endings[i]),
          `Tab order should be ${expected}, got ${endings}.`
        );
      }

      async function reset() {
        let tabs = await browser.tabs.query({ url: "http://example.com/*" });
        await browser.tabs.move(
          tabs.sort((a, b) => num(a.url) - num(b.url)).map(tab => tab.id),
          { index: 0 }
        );
      }

      async function move(moveIndexes, moveTo) {
        let tabs = await browser.tabs.query({ url: "http://example.com/*" });
        await browser.tabs.move(
          moveIndexes.map(e => tabs[e - 1].id),
          {
            index: moveTo,
          }
        );
      }

      let tests = [
        { move: [2], index: 0, result: [2, 1, 3, 4] },
        { move: [2], index: -1, result: [1, 3, 4, 2] },
        // Start -> After first tab  -> After second tab
        { move: [4, 3], index: 0, result: [4, 3, 1, 2] },
        // [1, 2, 3, 4] -> [1, 4, 2, 3] -> [1, 4, 3, 2]
        { move: [4, 3], index: 1, result: [1, 4, 3, 2] },
        // [1, 2, 3, 4] -> [2, 3, 1, 4] -> [3, 1, 2, 4]
        { move: [1, 2], index: 2, result: [3, 1, 2, 4] },
        // [1, 2, 3, 4] -> [1, 2, 4, 3] -> [2, 4, 1, 3]
        { move: [4, 1], index: 2, result: [2, 4, 1, 3] },
        // [1, 2, 3, 4] -> [2, 3, 1, 4] -> [2, 3, 1, 4]
        { move: [1, 4], index: 2, result: [2, 3, 1, 4] },
      ];

      for (let test of tests) {
        await reset();
        await move(test.move, test.index);
        await check(test.result);
      }

      let firstId = (
        await browser.tabs.query({
          url: "http://example.com/*",
        })
      )[0].id;
      // Assuming that tab.id of 12345 does not exist.
      await browser.test.assertRejects(
        browser.tabs.move([firstId, 12345], { index: -1 }),
        /Invalid tab/,
        "Should receive invalid tab error"
      );
      // The first argument got moved, the second on failed.
      await check([2, 3, 1, 4]);

      browser.test.notifyPass("tabs.move");
    },
  });

  await extension.startup();
  await extension.awaitFinish("tabs.move");
  await extension.unload();

  for (let tab of tabs) {
    BrowserTestUtils.removeTab(tab);
  }
});
