import type { DeltaInsert } from '@blocksuite/store';
import { expect } from '@playwright/test';

import {
  captureHistory,
  dragBetweenIndices,
  dragOverTitle,
  enterPlaygroundRoom,
  focusRichText,
  focusTitle,
  getIndexCoordinate,
  getPageSnapshot,
  initEmptyEdgelessState,
  initEmptyParagraphState,
  initThreeDividers,
  initThreeParagraphs,
  pressArrowDown,
  pressArrowLeft,
  pressArrowRight,
  pressArrowUp,
  pressBackspace,
  pressBackspaceWithShortKey,
  pressEnter,
  pressForwardDelete,
  pressShiftEnter,
  pressShiftTab,
  pressSpace,
  pressTab,
  redoByClick,
  redoByKeyboard,
  resetHistory,
  setSelection,
  SHORT_KEY,
  switchReadonly,
  type,
  undoByClick,
  undoByKeyboard,
  updateBlockType,
  waitDefaultPageLoaded,
  waitNextFrame,
} from './utils/actions/index.js';
import {
  assertBlockChildrenFlavours,
  assertBlockChildrenIds,
  assertBlockCount,
  assertBlockSelections,
  assertBlockType,
  assertClassName,
  assertDivider,
  assertDocTitleFocus,
  assertRichTextInlineRange,
  assertRichTexts,
  assertTitle,
} from './utils/asserts.js';
import { test } from './utils/playwright.js';

test('init paragraph by page title enter at last', async ({ page }) => {
  await enterPlaygroundRoom(page);
  await initEmptyParagraphState(page);
  await waitDefaultPageLoaded(page);
  await focusTitle(page);
  await type(page, 'hello');
  await pressEnter(page);
  await type(page, 'world');

  await assertTitle(page, 'hello');
  await assertRichTexts(page, ['world', '']);

  //#region Fixes: https://github.com/toeverything/blocksuite/issues/1007
  test.info().annotations.push({
    type: 'issue',
    description: 'https://github.com/toeverything/blocksuite/issues/1007',
  });
  await page.keyboard.press('ArrowLeft');
  await focusTitle(page);
  await pressEnter(page);
  await assertRichTexts(page, ['', 'world', '']);
  //#endregion
});

test('init paragraph by page title enter in middle', async ({ page }) => {
  await enterPlaygroundRoom(page);
  await initEmptyParagraphState(page);
  await waitDefaultPageLoaded(page);
  await focusTitle(page);
  await type(page, 'hello');
  await page.keyboard.press('ArrowLeft');
  await page.keyboard.press('ArrowLeft');
  await page.keyboard.press('ArrowLeft');
  await pressEnter(page);

  await assertTitle(page, 'he');
  await assertRichTexts(page, ['llo', '']);
});

test('drag over paragraph title', async ({ page }) => {
  await enterPlaygroundRoom(page);
  await initEmptyParagraphState(page);
  await waitDefaultPageLoaded(page);
  await focusTitle(page);
  await type(page, 'hello');
  await assertTitle(page, 'hello');
  await resetHistory(page);

  await dragOverTitle(page);
  await page.keyboard.press('Backspace', { delay: 100 });
  await assertTitle(page, '');

  await undoByKeyboard(page);
  await assertTitle(page, 'hello');
});

test('backspace and arrow on title', async ({ page }) => {
  await enterPlaygroundRoom(page);
  await initEmptyParagraphState(page);
  await waitDefaultPageLoaded(page);
  await focusTitle(page);
  await type(page, 'hello');
  await assertTitle(page, 'hello');
  await resetHistory(page);

  await pressBackspace(page);
  await assertTitle(page, 'hell');

  await pressArrowLeft(page, 2);
  await captureHistory(page);
  await pressBackspace(page);
  await assertTitle(page, 'hll');

  await pressArrowDown(page);
  await assertRichTextInlineRange(page, 0, 0, 0);

  await undoByKeyboard(page);
  await assertTitle(page, 'hell');

  await redoByClick(page);
  await assertTitle(page, 'hll');
});

for (const { initState, desc } of [
  {
    initState: initEmptyParagraphState,
    desc: 'without surface',
  },
  {
    initState: initEmptyEdgelessState,
    desc: 'with surface',
  },
]) {
  test(`backspace on line start of the first block (${desc})`, async ({
    page,
  }) => {
    await enterPlaygroundRoom(page);
    await initState(page);
    await waitDefaultPageLoaded(page);
    await focusTitle(page);
    await type(page, 'hello');
    await assertTitle(page, 'hello');
    await resetHistory(page);

    await focusRichText(page, 0);
    await type(page, 'abc');
    await page.keyboard.press('ArrowLeft');
    await page.keyboard.press('ArrowLeft');
    await page.keyboard.press('ArrowLeft');
    await page.waitForTimeout(300);
    await assertRichTextInlineRange(page, 0, 0, 0);

    await pressBackspace(page);
    await assertTitle(page, 'helloabc');

    await pressEnter(page);
    await assertTitle(page, 'hello');
    await assertRichTexts(page, ['abc', '']);

    await pressBackspace(page);
    await assertTitle(page, 'helloabc');
    await assertRichTexts(page, ['']);
    await undoByClick(page);
    await assertTitle(page, 'hello');
    await assertRichTexts(page, ['abc', '']);

    await redoByClick(page);
    await assertTitle(page, 'helloabc');
    await assertRichTexts(page, ['']);
  });

  test(`backspace on line start of the first empty block (${desc})`, async ({
    page,
  }) => {
    await enterPlaygroundRoom(page);
    await initState(page);
    await focusTitle(page);

    await pressArrowDown(page);
    await pressBackspace(page);
    await assertBlockCount(page, 'paragraph', 1);

    await pressArrowDown(page);
    await assertRichTextInlineRange(page, 0, 0, 0);
  });
}

test('append new paragraph block by enter', async ({ page }) => {
  await enterPlaygroundRoom(page);
  await initEmptyParagraphState(page);
  await focusRichText(page);
  await type(page, 'hello');
  await assertRichTextInlineRange(page, 0, 5, 0);

  await pressEnter(page);
  await assertRichTexts(page, ['hello', '']);
  await assertRichTextInlineRange(page, 1, 0, 0);

  await undoByKeyboard(page);
  await waitNextFrame(page);
  await assertRichTexts(page, ['hello']);
  await assertRichTextInlineRange(page, 0, 5, 0);

  await redoByKeyboard(page);
  await waitNextFrame(page);
  await assertRichTexts(page, ['hello', '']);
  await assertRichTextInlineRange(page, 1, 0, 0);
});

test('insert new paragraph block by enter', async ({ page }) => {
  await enterPlaygroundRoom(page);
  await initEmptyParagraphState(page);
  await focusRichText(page);
  await pressEnter(page);
  await pressEnter(page);
  await assertRichTexts(page, ['', '', '']);

  await focusRichText(page, 1);
  await type(page, 'hello');
  await assertRichTexts(page, ['', 'hello', '']);

  await pressEnter(page);
  await type(page, 'world');
  await assertRichTexts(page, ['', 'hello', 'world', '']);
  await assertBlockChildrenFlavours(page, '1', [
    'affine:paragraph',
    'affine:paragraph',
    'affine:paragraph',
    'affine:paragraph',
  ]);
});

test('split paragraph block by enter', async ({ page }) => {
  await enterPlaygroundRoom(page);
  await initEmptyParagraphState(page);
  await focusRichText(page);

  await type(page, 'hello');
  await assertRichTexts(page, ['hello']);

  await pressArrowLeft(page, 3);
  await page.waitForTimeout(300);
  await assertRichTextInlineRange(page, 0, 2, 0);

  await pressEnter(page);
  await assertRichTexts(page, ['he', 'llo']);
  await assertBlockChildrenFlavours(page, '1', [
    'affine:paragraph',
    'affine:paragraph',
  ]);
  await assertRichTextInlineRange(page, 1, 0, 0);

  await undoByKeyboard(page);
  await assertRichTexts(page, ['hello']);

  await redoByKeyboard(page);
  await assertRichTexts(page, ['he', 'llo']);
});

test('split paragraph block with selected text by enter', async ({ page }) => {
  await enterPlaygroundRoom(page);
  await initEmptyParagraphState(page);
  await focusRichText(page);

  await type(page, 'hello');
  await assertRichTexts(page, ['hello']);
  // Avoid Yjs history manager merge two operations
  await captureHistory(page);

  // select 'll'
  await page.keyboard.press('ArrowLeft');
  await page.keyboard.down('Shift');
  await page.waitForTimeout(100);
  await page.keyboard.press('ArrowLeft');
  await page.keyboard.press('ArrowLeft');
  await page.waitForTimeout(300);
  await page.keyboard.up('Shift');
  await assertRichTextInlineRange(page, 0, 2, 2);

  await pressEnter(page);
  await assertRichTexts(page, ['he', 'o']);
  await assertBlockChildrenFlavours(page, '1', [
    'affine:paragraph',
    'affine:paragraph',
  ]);
  await assertRichTextInlineRange(page, 1, 0, 0);

  await undoByKeyboard(page);
  await assertRichTexts(page, ['hello']);

  await redoByKeyboard(page);
  await assertRichTexts(page, ['he', 'o']);
});

test('add multi line by soft enter', async ({ page }) => {
  await enterPlaygroundRoom(page);
  await initEmptyParagraphState(page);
  await focusRichText(page);

  await type(page, 'hello');
  await assertRichTexts(page, ['hello']);

  await pressArrowLeft(page, 3);
  await assertRichTextInlineRange(page, 0, 2, 0);
  // Avoid Yjs history manager merge two operations
  await captureHistory(page);

  await pressShiftEnter(page);
  await assertRichTexts(page, ['he\nllo']);
  await assertRichTextInlineRange(page, 0, 3, 0);

  await undoByKeyboard(page);
  await assertRichTexts(page, ['hello']);

  await redoByKeyboard(page);
  await assertRichTexts(page, ['he\nllo']);
});

test('indent and unindent existing paragraph block', async ({ page }) => {
  await enterPlaygroundRoom(page);
  await initEmptyParagraphState(page);
  await focusRichText(page);
  await type(page, 'hello');

  await pressEnter(page);
  await focusRichText(page, 1);
  await type(page, 'world');
  await assertRichTexts(page, ['hello', 'world']);

  // indent
  await page.keyboard.press('Tab');
  await assertRichTexts(page, ['hello', 'world']);
  await assertBlockChildrenIds(page, '1', ['2']);
  await assertBlockChildrenIds(page, '2', ['3']);

  // unindent
  await pressShiftTab(page);
  await assertRichTexts(page, ['hello', 'world']);
  await assertBlockChildrenIds(page, '1', ['2', '3']);

  await undoByKeyboard(page);
  await assertBlockChildrenIds(page, '1', ['2']);

  await redoByKeyboard(page);
  await assertBlockChildrenIds(page, '1', ['2', '3']);
});

test('remove all indent for a paragraph block', async ({ page }) => {
  await enterPlaygroundRoom(page);
  await initEmptyParagraphState(page);
  await focusRichText(page);
  await type(page, 'hello');
  await pressEnter(page);
  await pressTab(page);
  await type(page, 'world');
  await pressEnter(page);
  await pressTab(page);
  await type(page, 'foo');
  await assertBlockChildrenIds(page, '3', ['4']);
  await assertRichTexts(page, ['hello', 'world', 'foo']);
  await pressBackspaceWithShortKey(page);
  await assertRichTexts(page, ['hello', 'world', '']);
  await pressBackspaceWithShortKey(page);
  await assertBlockChildrenIds(page, '1', ['2', '4']);
  await assertBlockChildrenIds(page, '2', ['3']);
});

test('update paragraph with children to head type', async ({ page }) => {
  await enterPlaygroundRoom(page);
  await initEmptyParagraphState(page);
  await focusRichText(page);
  await type(page, 'aaa');

  await pressEnter(page);
  await focusRichText(page, 1);
  await type(page, 'bbb');
  await pressEnter(page);
  await focusRichText(page, 2);
  await type(page, 'ccc');
  await assertRichTexts(page, ['aaa', 'bbb', 'ccc']);

  // aaa
  //   bbc
  //   ccc
  await focusRichText(page, 1);
  await page.keyboard.press('Tab');
  await focusRichText(page, 2);
  await page.keyboard.press('Tab');
  await assertRichTexts(page, ['aaa', 'bbb', 'ccc']);
  await assertBlockChildrenIds(page, '1', ['2']);
  await assertBlockChildrenIds(page, '2', ['3', '4']);

  await focusRichText(page);
  await pressArrowLeft(page, 3);

  await type(page, '# ');

  await assertRichTexts(page, ['aaa', 'bbb', 'ccc']);
  await assertBlockChildrenIds(page, '2', ['3', '4']);

  await undoByKeyboard(page);
  await assertRichTexts(page, ['# aaa', 'bbb', 'ccc']);
  await assertBlockChildrenIds(page, '1', ['2']);
  await assertBlockChildrenIds(page, '2', ['3', '4']);

  await redoByKeyboard(page);
  await assertRichTexts(page, ['aaa', 'bbb', 'ccc']);
  await assertBlockChildrenIds(page, '2', ['3', '4']);
});

test('should indent and unindent works with children', async ({
  page,
}, testInfo) => {
  await enterPlaygroundRoom(page);
  await initEmptyParagraphState(page);
  await initThreeParagraphs(page);
  await pressEnter(page);
  await type(page, '012');
  await pressEnter(page);
  await type(page, '345');
  // 123
  // 456
  // 789
  // 012
  // 345

  expect(await getPageSnapshot(page, true)).toMatchSnapshot(
    `${testInfo.title}_init.json`
  );
  //-- test indent --//

  // Focus 789
  await focusRichText(page, 2);
  await pressTab(page);
  // 123
  // 456
  //   789|
  // 012
  // 345

  expect(await getPageSnapshot(page, true)).toMatchSnapshot(
    `${testInfo.title}_indent.json`
  );

  // Focus 012
  await focusRichText(page, 3);
  await pressTab(page);
  // 123
  // 456
  //   789
  //   012|
  // 345

  expect(await getPageSnapshot(page, true)).toMatchSnapshot(
    `${testInfo.title}_indent_2.json`
  );

  // Focus 456
  await focusRichText(page, 1);
  await pressTab(page);
  // 123
  //   456|
  //     789
  //     012
  // 345

  expect(await getPageSnapshot(page, true)).toMatchSnapshot(
    `${testInfo.title}_indent_3.json`
  );

  // Focus 345
  await focusRichText(page, 4);
  await pressTab(page, 3);
  // 123
  //   456
  //     789
  //     012
  //       345|

  expect(await getPageSnapshot(page, true)).toMatchSnapshot(
    `${testInfo.title}_indent_4.json`
  );
  //-- test unindent --//

  // Focus 456
  await focusRichText(page, 1);
  await pressShiftTab(page);
  // 123
  // 456|
  //   789
  //   012
  //     345

  expect(await getPageSnapshot(page, true)).toMatchSnapshot(
    `${testInfo.title}_unindent_1.json`
  );

  // Focus 012
  await focusRichText(page, 3);
  await pressShiftTab(page);
  // 123
  // 456
  //   789
  // 012|
  //   345

  expect(await getPageSnapshot(page, true)).toMatchSnapshot(
    `${testInfo.title}_unindent_2.json`
  );

  // Focus 789
  await focusRichText(page, 2);
  await pressShiftTab(page);
  // 123
  // 456
  // 789|
  // 012
  //   345

  // Focus 345
  await focusRichText(page, 4);
  await pressShiftTab(page);
  // 123
  // 456
  // 789
  // 012
  // 345|

  expect(await getPageSnapshot(page, true)).toMatchSnapshot(
    `${testInfo.title}_unindent_3.json`
  );
});

test('paragraph with child block should work at enter', async ({
  page,
}, testInfo) => {
  await enterPlaygroundRoom(page);
  await initEmptyParagraphState(page);
  await focusRichText(page);
  await type(page, '123');
  await pressEnter(page);
  await type(page, '456');

  await focusRichText(page, 1);
  await page.keyboard.press('Tab');
  expect(await getPageSnapshot(page, true)).toMatchSnapshot(
    `${testInfo.title}_init.json`
  );
  await focusRichText(page, 0);
  await pressEnter(page);
  await type(page, '789');
  expect(await getPageSnapshot(page, true)).toMatchSnapshot(
    `${testInfo.title}_final.json`
  );
});

test('should delete paragraph block child can hold cursor in correct position', async ({
  page,
}, testInfo) => {
  await enterPlaygroundRoom(page);
  await initEmptyParagraphState(page);
  await focusRichText(page);
  await type(page, '123');
  await pressEnter(page);
  await pressTab(page);
  await waitNextFrame(page);
  await type(page, '4');
  expect(await getPageSnapshot(page, true)).toMatchSnapshot(
    `${testInfo.title}_init.json`
  );

  await pressBackspace(page, 2);
  await waitNextFrame(page);
  await type(page, 'now');

  expect(await getPageSnapshot(page, true)).toMatchSnapshot(
    `${testInfo.title}_final.json`
  );
});

test('switch between paragraph types', async ({ page }) => {
  await enterPlaygroundRoom(page);
  await initEmptyParagraphState(page);
  await focusRichText(page);
  await type(page, 'hello');

  const selector = '.affine-paragraph-rich-text-wrapper';

  await updateBlockType(page, 'affine:paragraph', 'h1');
  await assertClassName(page, selector, /h1/);

  await updateBlockType(page, 'affine:paragraph', 'h2');
  await assertClassName(page, selector, /h2/);

  await updateBlockType(page, 'affine:paragraph', 'h3');
  await assertClassName(page, selector, /h3/);

  await undoByClick(page);
  await assertClassName(page, selector, /h2/);

  await undoByClick(page);
  await assertClassName(page, selector, /h1/);
});

test('delete at start of paragraph block', async ({ page }) => {
  await enterPlaygroundRoom(page);
  await initEmptyParagraphState(page);
  await focusRichText(page);
  await type(page, 'hello');

  await pressEnter(page);
  await type(page, 'a');

  await updateBlockType(page, 'affine:paragraph', 'h1');
  await focusRichText(page, 1);
  await assertBlockType(page, '2', 'text');
  await assertBlockType(page, '3', 'h1');

  await pressBackspace(page);
  await pressBackspace(page);
  await assertBlockType(page, '3', 'text');
  await assertBlockChildrenIds(page, '1', ['2', '3']);

  await page.keyboard.press('Backspace');
  await assertBlockChildrenIds(page, '1', ['2']);

  await undoByClick(page);
  await assertBlockChildrenIds(page, '1', ['2', '3']);
});

test('delete at start of paragraph immediately following list', async ({
  page,
}) => {
  await enterPlaygroundRoom(page);
  await initEmptyParagraphState(page);
  await focusRichText(page);
  await type(page, 'hello');

  await pressEnter(page);
  await type(page, 'a');

  await captureHistory(page);

  await assertRichTexts(page, ['hello', 'a']);
  await assertBlockChildrenIds(page, '1', ['2', '3']);
  await assertBlockType(page, '3', 'text');

  // text -> bulleted
  await focusRichText(page, 1);
  await updateBlockType(page, 'affine:list', 'bulleted');
  await assertBlockType(page, '2', 'text');
  await assertBlockType(page, '4', 'bulleted');
  await pressBackspace(page, 2);
  await waitNextFrame(page);
  await assertBlockType(page, '5', 'text');
  await assertBlockChildrenIds(page, '1', ['2', '5']);
  await pressBackspace(page);
  await assertBlockChildrenIds(page, '1', ['2']);

  // reset
  await undoByClick(page);
  await undoByClick(page);
  await assertRichTexts(page, ['hello', 'a']);
  await assertBlockChildrenIds(page, '1', ['2', '3']);
  await assertBlockType(page, '3', 'text');

  // text -> numbered
  await focusRichText(page, 1);
  await updateBlockType(page, 'affine:list', 'numbered');
  await assertBlockType(page, '2', 'text');
  await assertBlockType(page, '6', 'numbered');
  await pressBackspace(page, 2);
  await waitNextFrame(page);
  await assertBlockType(page, '7', 'text');
  await assertBlockChildrenIds(page, '1', ['2', '7']);
  await pressBackspace(page);
  await assertBlockChildrenIds(page, '1', ['2']);

  // reset
  await undoByClick(page);
  await undoByClick(page);
  await assertRichTexts(page, ['hello', 'a']);
  await assertBlockChildrenIds(page, '1', ['2', '3']);
  await assertBlockType(page, '3', 'text');

  // text -> todo
  await focusRichText(page, 1);
  await updateBlockType(page, 'affine:list', 'todo');
  await assertBlockType(page, '2', 'text');
  await assertBlockType(page, '8', 'todo');
  await pressBackspace(page, 2);
  await waitNextFrame(page);
  await assertBlockType(page, '9', 'text');
  await assertBlockChildrenIds(page, '1', ['2', '9']);
  await pressBackspace(page);
  await assertBlockChildrenIds(page, '1', ['2']);
});

test('delete at start of paragraph with content', async ({ page }) => {
  await enterPlaygroundRoom(page);
  await initEmptyParagraphState(page);
  await focusRichText(page);
  await type(page, '123');

  await pressEnter(page);
  await type(page, '456');
  await assertRichTexts(page, ['123', '456']);

  await captureHistory(page);

  await pressArrowLeft(page, 3);
  await assertRichTextInlineRange(page, 1, 0, 0);

  await pressBackspace(page);
  await assertRichTexts(page, ['123456']);

  await undoByClick(page);
  await assertRichTexts(page, ['123', '456']);
});

test('get focus from page title enter', async ({ page }) => {
  await enterPlaygroundRoom(page);
  await initEmptyParagraphState(page);
  await focusTitle(page);
  await type(page, 'hello');
  await assertRichTexts(page, ['']);

  await pressEnter(page);
  await type(page, 'world');
  await assertRichTexts(page, ['world', '']);
});

test('handling keyup when cursor located in first paragraph', async ({
  page,
}) => {
  await enterPlaygroundRoom(page);
  await initEmptyParagraphState(page);
  await focusTitle(page);
  await type(page, 'hello');
  await assertRichTexts(page, ['']);

  await pressEnter(page);
  await type(page, 'world');
  await assertRichTexts(page, ['world', '']);
  await pressArrowUp(page);
  await waitNextFrame(page);
  await pressArrowUp(page);
  await assertDocTitleFocus(page);
});

test('after deleting a text row, cursor should jump to the end of previous list row', async ({
  page,
}) => {
  await enterPlaygroundRoom(page);
  await initEmptyParagraphState(page);
  await focusRichText(page);
  await type(page, 'hello');
  await assertRichTextInlineRange(page, 0, 5, 0);

  await pressEnter(page);
  await type(page, 'w');
  await assertRichTexts(page, ['hello', 'w']);
  await assertRichTextInlineRange(page, 1, 1, 0);
  await pressArrowUp(page);
  await pressArrowDown(page);

  await pressArrowLeft(page);
  await pressBackspace(page);
  await assertRichTextInlineRange(page, 0, 5, 0);
});

test('press tab in paragraph children', async ({ page }) => {
  await enterPlaygroundRoom(page);
  await initEmptyParagraphState(page);
  await waitDefaultPageLoaded(page);
  await focusTitle(page);
  await pressEnter(page);
  await type(page, '1');
  await pressEnter(page);
  await pressTab(page);
  await type(page, '2');
  await pressEnter(page);
  await pressTab(page);
  await type(page, '3');
  await page.keyboard.press('ArrowUp', { delay: 50 });
  await page.keyboard.press('ArrowLeft', { delay: 50 });
  await type(page, '- ');
  await assertRichTexts(page, ['1', '2', '3', '']);
});

test('press left in first paragraph start should not change cursor position', async ({
  page,
}) => {
  await enterPlaygroundRoom(page);
  await initEmptyParagraphState(page);
  await focusRichText(page);
  await type(page, '1');

  await pressArrowLeft(page, 2);
  await type(page, 'l');
  await assertRichTexts(page, ['l1']);
  await assertTitle(page, '');
});

test('press arrow down should move caret to the start of line', async ({
  page,
}) => {
  await enterPlaygroundRoom(page);
  await page.evaluate(() => {
    const { doc } = window;
    const rootId = doc.addBlock('affine:page', {
      title: new window.$blocksuite.store.Text(),
    });
    const note = doc.addBlock('affine:note', {}, rootId);
    doc.addBlock(
      'affine:paragraph',
      {
        text: new window.$blocksuite.store.Text('0'.repeat(100)),
      },
      note
    );
    doc.addBlock(
      'affine:paragraph',
      {
        text: new window.$blocksuite.store.Text('1'),
      },
      note
    );
  });

  // Focus the empty child paragraph
  await focusRichText(page, 1);
  await pressArrowLeft(page);
  await pressArrowUp(page);
  await pressArrowDown(page);
  await type(page, '2');
  await assertRichTexts(page, ['0'.repeat(100), '21']);
});

test('press arrow up in the second line should move caret to the first line', async ({
  page,
}) => {
  await enterPlaygroundRoom(page);
  await page.evaluate(() => {
    const { doc } = window;
    const rootId = doc.addBlock('affine:page', {
      title: new window.$blocksuite.store.Text(),
    });
    const note = doc.addBlock('affine:note', {}, rootId);
    const delta = Array.from({ length: 150 }, (_, i) => {
      return i % 2 === 0
        ? { insert: 'i', attributes: { italic: true } }
        : { insert: 'b', attributes: { bold: true } };
    }) as DeltaInsert[];
    const text = new window.$blocksuite.store.Text(delta);
    doc.addBlock('affine:paragraph', { text }, note);
    doc.addBlock('affine:paragraph', {}, note);
  });

  // Focus the empty paragraph
  await focusRichText(page, 1);
  await assertRichTexts(page, ['ib'.repeat(75), '']);
  await pressArrowUp(page, 2);
  await type(page, '0');
  await assertTitle(page, '');
  await assertRichTexts(page, ['0' + 'ib'.repeat(75), '']);
  await pressArrowUp(page, 2);

  // At title
  await type(page, '1');
  await assertTitle(page, '1');
  await assertRichTexts(page, ['0' + 'ib'.repeat(75), '']);

  // At the first line of the first paragraph
  await pressArrowDown(page);
  // At the second paragraph
  await pressArrowDown(page, 3);
  await pressArrowRight(page);
  await type(page, '2');

  await assertRichTexts(page, ['0' + 'ib'.repeat(75), '2']);

  // Go to the start of the second paragraph
  await pressArrowLeft(page);
  await pressArrowUp(page);
  await pressArrowDown(page);
  // Should be inserted at the start of the second paragraph
  await type(page, '3');
  await assertRichTexts(page, ['0' + 'ib'.repeat(75), '32']);
});

test('press arrow down in indent line should not move caret to the start of line', async ({
  page,
}) => {
  await enterPlaygroundRoom(page);
  await page.evaluate(() => {
    const { doc } = window;
    const rootId = doc.addBlock('affine:page', {
      title: new window.$blocksuite.store.Text(),
    });
    const note = doc.addBlock('affine:note', {}, rootId);
    const p1 = doc.addBlock('affine:paragraph', {}, note);
    const p2 = doc.addBlock('affine:paragraph', {}, p1);
    doc.addBlock('affine:paragraph', {}, p2);
    doc.addBlock(
      'affine:paragraph',
      {
        text: new window.$blocksuite.store.Text('0'),
      },
      note
    );
  });

  // Focus the empty child paragraph
  await focusRichText(page, 2);
  await pressArrowDown(page, 2);
  await pressArrowRight(page);
  await waitNextFrame(page);
  // Now the caret should be at the end of the last paragraph
  await type(page, '1');
  await assertRichTexts(page, ['', '', '', '01']);

  await focusRichText(page, 2);
  await waitNextFrame(page);
  // Insert a new long text to wrap the line
  await page.keyboard.insertText('0'.repeat(100));
  await waitNextFrame(page);

  await focusRichText(page, 1);
  // Through long text
  await pressArrowDown(page, 3);
  await pressArrowRight(page);
  await type(page, '2');
  await assertRichTexts(page, ['', '', '0'.repeat(100), '012']);
});

test('should placeholder works', async ({ page }) => {
  await enterPlaygroundRoom(page);
  await initEmptyParagraphState(page);
  await focusRichText(page);
  const placeholder = page.locator('.affine-paragraph-placeholder.visible');
  await expect(placeholder).toBeVisible();
  await expect(placeholder).toHaveCount(1);
  await expect(placeholder).toContainText("Type '/' for commands");

  await type(page, '1');
  await expect(placeholder).not.toBeVisible();
  await pressBackspace(page);

  await expect(placeholder).toBeVisible();
  await updateBlockType(page, 'affine:paragraph', 'h1');

  await expect(placeholder).toBeVisible();
  await expect(placeholder).toHaveText('Heading 1');
  await updateBlockType(page, 'affine:paragraph', 'text');
  await focusRichText(page, 0);
  await expect(placeholder).toBeVisible();
  await expect(placeholder).toContainText("Type '/' for commands");

  await pressEnter(page);
  await expect(placeholder).toHaveCount(1);
});

test('should placeholder not show when multiple blocks are selected', async ({
  page,
}) => {
  await enterPlaygroundRoom(page);
  await initEmptyParagraphState(page);
  await focusRichText(page);
  await pressEnter(page);
  await assertRichTexts(page, ['', '']);
  const coord = await getIndexCoordinate(page, [0, 0]);
  // blur
  await page.mouse.click(0, 0);
  await page.mouse.move(coord.x - 26 - 24, coord.y - 10, { steps: 20 });
  await page.mouse.down();
  // ←
  await page.mouse.move(coord.x + 20, coord.y + 50, { steps: 20 });
  await page.mouse.up();
  const placeholder = page.locator('.affine-paragraph-placeholder.visible');
  await expect(placeholder).toBeHidden();
});

test.describe('press ArrowDown when cursor is at the last line of a block', () => {
  test.beforeEach(async ({ page }) => {
    await enterPlaygroundRoom(page);
    await page.evaluate(() => {
      const { doc } = window;
      const rootId = doc.addBlock('affine:page', {
        title: new window.$blocksuite.store.Text(),
      });
      const note = doc.addBlock('affine:note', {}, rootId);
      doc.addBlock(
        'affine:paragraph',
        {
          text: new window.$blocksuite.store.Text(
            'This is the 2nd last block.'
          ),
        },
        note
      );
      doc.addBlock(
        'affine:paragraph',
        {
          text: new window.$blocksuite.store.Text('This is the last block.'),
        },
        note
      );
    });
  });

  test('move cursor to next block if this block is _not_ the last block in the page', async ({
    page,
  }) => {
    // Click at the top-left corner of the 2nd last block to place the cursor at its start
    await focusRichText(page, 0, { clickPosition: { x: 0, y: 0 } });
    // Cursor should have been moved to the start of the last block.
    await pressArrowDown(page);
    await type(page, "I'm here. ");
    await assertRichTexts(page, [
      'This is the 2nd last block.',
      "I'm here. This is the last block.",
    ]);
  });
  test('move cursor to the end of line if the block is the last block in the page', async ({
    page,
  }) => {
    // Click at the top-left corner of the last block to place the cursor at its start
    await focusRichText(page, 1, { clickPosition: { x: 0, y: 0 } });
    // Cursor should have been moved to the end of the only line.
    await pressArrowDown(page, 2);
    await pressArrowRight(page);
    await type(page, " I'm here.");
    await assertRichTexts(page, [
      'This is the 2nd last block.',
      "This is the last block. I'm here.",
    ]);
  });
});

test('delete empty text paragraph block should keep children blocks when following custom blocks', async ({
  page,
}, testInfo) => {
  await enterPlaygroundRoom(page);
  await initEmptyParagraphState(page);
  await focusRichText(page);
  await type(page, '--- ');
  await assertDivider(page, 1);

  // Click blank area to add a paragraph block after divider
  await page.mouse.click(100, 200);
  await page.waitForTimeout(200);

  // Add to paragraph blocks
  await initThreeParagraphs(page);
  await assertRichTexts(page, ['123', '456', '789']);

  // Indent the second paragraph block
  await focusRichText(page, 2);
  await pressTab(page);

  expect(await getPageSnapshot(page, true)).toMatchSnapshot(
    `${testInfo.title}_init.json`
  );

  // Delete the parent paragraph block
  await focusRichText(page, 1);
  await pressBackspace(page, 4);

  await assertRichTexts(page, ['123', '789']);

  expect(await getPageSnapshot(page, true)).toMatchSnapshot(
    `${testInfo.title}_final.json`
  );
});

test('delete first paragraph with children should keep children blocks', async ({
  page,
}) => {
  await enterPlaygroundRoom(page);
  await initEmptyParagraphState(page);
  await focusRichText(page);
  await type(page, '123');
  await pressEnter(page);
  await pressTab(page);
  await waitNextFrame(page);
  await type(page, '456');
  await setSelection(page, 2, 1, 2, 1);
  await pressBackspace(page, 2);
  await waitNextFrame(page);
  await assertTitle(page, '23');
  await assertRichTexts(page, ['456']);
});

test('paragraph indent and delete in line start', async ({
  page,
}, testInfo) => {
  await enterPlaygroundRoom(page);
  await initEmptyParagraphState(page);
  await focusRichText(page);
  await type(page, 'abc');
  await pressEnter(page);
  await pressTab(page);
  await type(page, 'efg');
  await pressEnter(page);
  await pressTab(page);
  await type(page, 'hij');
  await pressEnter(page);
  await pressShiftTab(page);
  await type(page, 'klm');
  await pressEnter(page);
  await type(page, 'nop');
  await setSelection(page, 3, 1, 3, 1);
  // abc
  //   e|fg
  //     hij
  //   klm
  //   nop

  expect(await getPageSnapshot(page, true)).toMatchSnapshot(
    `${testInfo.title}_init.json`
  );

  await pressBackspace(page, 2);
  await setSelection(page, 5, 1, 5, 1);
  // abcfg
  //   hij
  //   k|lm
  //   nop

  expect(await getPageSnapshot(page, true)).toMatchSnapshot(
    `${testInfo.title}_after_press_backspace.json`
  );

  await pressBackspace(page, 2);
  await setSelection(page, 6, 1, 6, 1);
  // abcfg
  //   hijlm
  //   n|op

  expect(await getPageSnapshot(page, true)).toMatchSnapshot(
    `${testInfo.title}_after_press_backspace_2.json`
  );

  await pressBackspace(page, 2);
  // abcfg
  //   hijlm
  // |op

  expect(await getPageSnapshot(page, true)).toMatchSnapshot(
    `${testInfo.title}_after_press_backspace_3.json`
  );
});

test('delete at the start of paragraph (multiple notes)', async ({ page }) => {
  await enterPlaygroundRoom(page);
  await page.evaluate(() => {
    const { doc } = window;

    const rootId = doc.addBlock('affine:page', {
      title: new window.$blocksuite.store.Text(),
    });
    doc.addBlock('affine:surface', {}, rootId);

    ['123', '456'].forEach(text => {
      const noteId = doc.addBlock('affine:note', {}, rootId);
      doc.addBlock(
        'affine:paragraph',
        {
          text: new window.$blocksuite.store.Text(text),
        },
        noteId
      );
    });

    doc.resetHistory();
  });

  await assertBlockCount(page, 'note', 2);

  await assertRichTexts(page, ['123', '456']);
  await focusRichText(page, 1);
  await pressArrowLeft(page, 3);
  await pressBackspace(page);
  await assertRichTexts(page, ['123456']);
});

test('arrow up/down navigation within and across paragraphs containing different types of text', async ({
  page,
}) => {
  test.info().annotations.push({
    type: 'issue',
    description: 'https://github.com/toeverything/blocksuite/issues/5155',
  });
  await enterPlaygroundRoom(page);
  await initEmptyParagraphState(page);
  await focusRichText(page);

  await type(page, 'a'.repeat(20));
  await assertRichTextInlineRange(page, 0, 20, 0);
  await type(page, '*');
  await type(page, 'i'.repeat(5));
  await type(page, '*');
  await pressSpace(page);
  await assertRichTextInlineRange(page, 0, 25, 0);
  await type(page, 'a'.repeat(100));
  await assertRichTextInlineRange(page, 0, 125, 0);
  await pressEnter(page);

  await type(page, 'a'.repeat(100));
  await assertRichTextInlineRange(page, 1, 100, 0);
  await type(page, '*');
  await type(page, 'i'.repeat(5));
  await type(page, '*');
  await pressSpace(page);
  await assertRichTextInlineRange(page, 1, 105, 0);
  await type(page, 'a'.repeat(20));
  await assertRichTextInlineRange(page, 1, 125, 0);

  await pressArrowUp(page);
  await assertRichTextInlineRange(page, 1, 29, 0);
  await pressArrowUp(page);
  await assertRichTextInlineRange(page, 0, 125, 0);
  await pressArrowUp(page);
  await assertRichTextInlineRange(page, 0, 32, 0);
  await pressArrowUp(page);
  await assertRichTextInlineRange(page, 0, 0, 0);
  await pressArrowDown(page);
  await assertRichTextInlineRange(page, 0, 125, 0);
  await pressArrowDown(page);
  await assertRichTextInlineRange(page, 1, 29, 0);
  await pressArrowDown(page);
  await assertRichTextInlineRange(page, 1, 125, 0);
});

test('select divider using delete keyboard from prev/next paragraph', async ({
  page,
}) => {
  test.info().annotations.push({
    type: 'issue',
    description: 'https://github.com/toeverything/blocksuite/issues/4547',
  });

  await enterPlaygroundRoom(page);
  await initEmptyParagraphState(page);

  await initThreeDividers(page);
  await assertDivider(page, 3);
  await assertRichTexts(page, ['123', '123']);

  await focusRichText(page, 0);
  await pressForwardDelete(page);
  await assertBlockSelections(page, ['4']);
  await assertDivider(page, 3);

  await focusRichText(page, 1);
  await pressArrowLeft(page, 3);
  await pressBackspace(page);
  await assertBlockSelections(page, ['6']);
  await assertDivider(page, 3);

  await assertRichTexts(page, ['123', '123']);
});

test.describe('readonly mode', () => {
  test('should placeholder not show at readonly mode', async ({ page }) => {
    await enterPlaygroundRoom(page);
    await initEmptyParagraphState(page);
    await focusRichText(page);

    await pressEnter(page);
    await updateBlockType(page, 'affine:paragraph', 'h1');

    const placeholder = page.locator('.affine-paragraph-placeholder.visible');

    await switchReadonly(page);
    await focusRichText(page, 0);
    await expect(placeholder).toBeHidden();

    await focusRichText(page, 1);
    await expect(placeholder).toBeHidden();
  });

  test('should readonly mode not be able to modify text', async ({
    page,
  }, testInfo) => {
    await enterPlaygroundRoom(page);
    await initEmptyParagraphState(page);

    await focusRichText(page);
    await type(page, 'hello');
    await switchReadonly(page);

    await pressBackspace(page, 5);
    await type(page, 'world');
    await dragBetweenIndices(page, [0, 1], [0, 3]);
    await page.keyboard.press(`${SHORT_KEY}+b`);
    expect(await getPageSnapshot(page, true)).toMatchSnapshot(
      `${testInfo.title}_1.json`
    );

    await undoByKeyboard(page);
    expect(await getPageSnapshot(page, true)).toMatchSnapshot(
      `${testInfo.title}_2.json`
    );
  });
});