// @ts-check
import {expect} from '@playwright/test';
import {test, login_user, load_logged_in_context} from './utils_e2e.js';

test.beforeAll(async ({browser}, workerInfo) => {
  await login_user(browser, workerInfo, 'user2');
});

async function assertSelectedLines(page, nums) {
  const pageAssertions = async () => {
    expect(
      await Promise.all((await page.locator('tr.active [data-line-number]').all()).map((line) => line.getAttribute('data-line-number'))),
    )
      .toStrictEqual(nums);

    // the first line selected has an action button
    if (nums.length > 0) await expect(page.locator(`#L${nums[0]} .code-line-button`)).toBeVisible();
  };

  await pageAssertions();

  // URL has the expected state
  expect(new URL(page.url()).hash)
    .toEqual(nums.length === 0 ? '' : nums.length === 1 ? `#L${nums[0]}` : `#L${nums[0]}-L${nums.at(-1)}`);

  // test selection restored from URL hash
  await page.reload();
  return pageAssertions();
}

test('Line Range Selection', async ({browser}, workerInfo) => {
  const context = await load_logged_in_context(browser, workerInfo, 'user2');
  const page = await context.newPage();

  const filePath = '/user2/repo1/src/branch/master/README.md?display=source';

  const response = await page.goto(filePath);
  await expect(response?.status()).toBe(200);

  await assertSelectedLines(page, []);
  await page.locator('span#L1').click();
  await assertSelectedLines(page, ['1']);
  await page.locator('span#L3').click({modifiers: ['Shift']});
  await assertSelectedLines(page, ['1', '2', '3']);
  await page.locator('span#L2').click();
  await assertSelectedLines(page, ['2']);
  await page.locator('span#L1').click({modifiers: ['Shift']});
  await assertSelectedLines(page, ['1', '2']);

  // out-of-bounds end line
  await page.goto(`${filePath}#L1-L100`);
  await assertSelectedLines(page, ['1', '2', '3']);
});

test('Readable diff', async ({page}, workerInfo) => {
  // remove this when the test covers more (e.g. accessibility scans or interactive behaviour)
  test.skip(workerInfo.project.name !== 'firefox', 'This currently only tests the backend-generated HTML code and it is not necessary to test with multiple browsers.');
  const expectedDiffs = [
    {id: 'testfile-2', removed: 'e', added: 'a'},
    {id: 'testfile-3', removed: 'allo', added: 'ola'},
    {id: 'testfile-4', removed: 'hola', added: 'native'},
    {id: 'testfile-5', removed: 'native', added: 'ubuntu-latest'},
    {id: 'testfile-6', added: '- runs-on: '},
    {id: 'testfile-7', removed: 'ubuntu', added: 'debian'},
  ];
  for (const thisDiff of expectedDiffs) {
    const response = await page.goto('/user2/diff-test/commits/branch/main');
    await expect(response?.status()).toBe(200); // Status OK
    await page.getByText(`Patch: ${thisDiff.id}`).click();
    if (thisDiff.removed) {
      await expect(page.getByText(thisDiff.removed, {exact: true})).toHaveClass(/removed-code/);
      await expect(page.getByText(thisDiff.removed, {exact: true})).toHaveCSS('background-color', 'rgb(252, 165, 165)');
    }
    if (thisDiff.added) {
      await expect(page.getByText(thisDiff.added, {exact: true})).toHaveClass(/added-code/);
      await expect(page.getByText(thisDiff.added, {exact: true})).toHaveCSS('background-color', 'rgb(134, 239, 172)');
    }
  }
});