/**
 * Tooltips (#209): where the sign goes, how long the pointer has to rest, what takes it away again,
 * and what the buttons without a caption say.
 */
import { afterEach, beforeAll, beforeEach, describe, expect, it, vi } from 'vitest';
import { CanvasTextMetrics, Container } from 'pixi.js';
import { CommandStack } from '../../src/core/commands/CommandStack';
import { rowActionTip } from '../../src/editor/inspector/fieldFactory';
import { toolbarTip } from '../../src/editor/panels/toolbarTips';
import { anchorName } from '../../src/editor/pixelart/ResizeCanvasDialog';
import { TabButton } from '../../src/editor/TabButton';
import {
  Button,
  placeTooltip,
  SortableList,
  TOOLTIP_DELAY_MS,
  TOOLTIP_GAP,
  TooltipLayer,
  tooltips,
  withShortcut,
} from '../../src/ui';
import { makeSpriteScene } from '../helpers';

vi.mock('../../src/ui/svg', () => ({ drawSvg: () => undefined, tintSvg: (svg: string) => svg }));

/** Seven pixels a letter, so a text has a width a test can reason about. */
beforeAll(() => {
  CanvasTextMetrics.measureText = ((text: string) => ({
    width: text.length * 7,
    height: 14,
    lines: [text],
    lineWidths: [text.length * 7],
  })) as never;
});

const SCREEN = { w: 800, h: 600 };

describe('where the sign goes', () => {
  it('is under the control, flush with its left edge', () => {
    expect(placeTooltip({ x: 100, y: 10, w: 24, h: 24 }, { w: 80, h: 20 }, SCREEN)).toEqual({
      x: 100,
      y: 34 + TOOLTIP_GAP,
    });
  });

  it('turns to the left at the right border: flush with the right edge of the control', () => {
    const at = placeTooltip({ x: 770, y: 10, w: 24, h: 24 }, { w: 80, h: 20 }, SCREEN);
    expect(at.x).toBe(770 + 24 - 80);
    expect(at.y).toBe(34 + TOOLTIP_GAP);
  });

  it('turns upwards at the bottom border', () => {
    const at = placeTooltip({ x: 100, y: 570, w: 24, h: 24 }, { w: 80, h: 20 }, SCREEN);
    expect(at).toEqual({ x: 100, y: 570 - TOOLTIP_GAP - 20 });
  });

  it('still fits exactly against the border without turning', () => {
    expect(placeTooltip({ x: 720, y: 10, w: 24, h: 24 }, { w: 80, h: 20 }, SCREEN).x).toBe(720);
    expect(placeTooltip({ x: 100, y: 550, w: 24, h: 24 }, { w: 80, h: 20 }, SCREEN).y).toBe(580);
  });

  it('is pushed back inside where it fits neither way', () => {
    const wide = placeTooltip({ x: 10, y: 10, w: 24, h: 24 }, { w: 900, h: 20 }, SCREEN);
    expect(wide.x).toBe(0);
    const narrowScreen = placeTooltip({ x: 60, y: 10, w: 24, h: 24 }, { w: 80, h: 20 }, { w: 100, h: 600 });
    expect(narrowScreen.x).toBe(4);
    const low = placeTooltip({ x: 10, y: 5, w: 24, h: 590 }, { w: 80, h: 20 }, SCREEN);
    expect(low.y).toBe(0);
  });

  it('lands on whole pixels', () => {
    const at = placeTooltip({ x: 10.5, y: 10.25, w: 24, h: 24 }, { w: 80, h: 20 }, SCREEN);
    expect(Number.isInteger(at.x) && Number.isInteger(at.y)).toBe(true);
  });
});

describe('the wait and what ends it', () => {
  let overlay: Container;
  let layer: TooltipLayer;
  const owner = {};
  const anchor = { x: 100, y: 10, w: 24, h: 24 };
  const says = (text: string) => () => ({ text, anchor });

  beforeEach(() => {
    vi.useFakeTimers();
    overlay = new Container();
    layer = new TooltipLayer(() => ({ overlay, screen: { width: 800, height: 600 } }));
  });
  afterEach(() => vi.useRealTimers());

  it('shows nothing before the pointer has rested, and the sign after', () => {
    layer.point(owner, '', says('Menu'), { x: 105, y: 15 });
    vi.advanceTimersByTime(TOOLTIP_DELAY_MS - 1);
    expect(layer.shown).toBeNull();
    expect(overlay.children.length).toBe(0);
    vi.advanceTimersByTime(1);
    expect(layer.shown?.text).toBe('Menu');
    expect(overlay.children.length).toBe(1);
  });

  it('sizes the sign from its text and puts it under the control', () => {
    layer.point(owner, '', says('Menu'), { x: 105, y: 15 });
    vi.advanceTimersByTime(TOOLTIP_DELAY_MS);
    expect(layer.shown?.box).toEqual({ x: 100, y: 34 + TOOLTIP_GAP, w: 4 * 7 + 12, h: 14 + 6 });
    expect(layer.shown?.anchor).toEqual(anchor);
  });

  it('starts the wait over with every real move', () => {
    layer.point(owner, '', says('Menu'), { x: 105, y: 15 });
    vi.advanceTimersByTime(400);
    layer.point(owner, '', says('Menu'), { x: 106, y: 15 });
    vi.advanceTimersByTime(400);
    expect(layer.shown).toBeNull();
    vi.advanceTimersByTime(100);
    expect(layer.shown?.text).toBe('Menu');
  });

  it('does not start over for a move that went nowhere', () => {
    layer.point(owner, '', says('Menu'), { x: 105, y: 15 });
    vi.advanceTimersByTime(400);
    layer.point(owner, '', says('Menu'), { x: 105, y: 15 });
    vi.advanceTimersByTime(100);
    expect(layer.shown?.text).toBe('Menu');
  });

  it('keeps the sign while the pointer moves on the same control', () => {
    layer.point(owner, '', says('Menu'), { x: 105, y: 15 });
    vi.advanceTimersByTime(TOOLTIP_DELAY_MS);
    layer.point(owner, '', says('Menu'), { x: 110, y: 20 });
    expect(layer.shown?.text).toBe('Menu');
    // And without a second wait running behind it.
    expect(vi.getTimerCount()).toBe(0);
  });

  it('asks for the text when the wait is over, not when it began', () => {
    let text = 'Undo Move object';
    layer.point(owner, '', () => ({ text, anchor }), { x: 105, y: 15 });
    text = 'Undo Rename object';
    vi.advanceTimersByTime(TOOLTIP_DELAY_MS);
    expect(layer.shown?.text).toBe('Undo Rename object');
  });

  it('shows nothing for a control that has nothing to say by then', () => {
    layer.point(owner, '', () => null, { x: 105, y: 15 });
    vi.advanceTimersByTime(TOOLTIP_DELAY_MS);
    expect(layer.shown).toBeNull();
    layer.point({}, '', says(''), { x: 105, y: 15 });
    vi.advanceTimersByTime(TOOLTIP_DELAY_MS);
    expect(layer.shown).toBeNull();
  });

  it('takes the sign away when the pointer leaves', () => {
    layer.point(owner, '', says('Menu'), { x: 105, y: 15 });
    vi.advanceTimersByTime(TOOLTIP_DELAY_MS);
    layer.leave(owner);
    expect(layer.shown).toBeNull();
    expect(overlay.children.length).toBe(0);
  });

  it('drops a wait when the pointer leaves before it is over', () => {
    layer.point(owner, '', says('Menu'), { x: 105, y: 15 });
    layer.leave(owner);
    expect(vi.getTimerCount()).toBe(0);
    vi.advanceTimersByTime(TOOLTIP_DELAY_MS * 2);
    expect(layer.shown).toBeNull();
  });

  it('ignores a leave from a control that is not the one under the pointer', () => {
    layer.point(owner, '', says('Menu'), { x: 105, y: 15 });
    vi.advanceTimersByTime(TOOLTIP_DELAY_MS);
    layer.leave({});
    expect(layer.shown?.text).toBe('Menu');
  });

  it('takes the sign away on a press and stays quiet on that control', () => {
    layer.point(owner, '', says('Menu'), { x: 105, y: 15 });
    vi.advanceTimersByTime(TOOLTIP_DELAY_MS);
    layer.dismiss();
    expect(layer.shown).toBeNull();
    layer.point(owner, '', says('Menu'), { x: 107, y: 15 });
    vi.advanceTimersByTime(TOOLTIP_DELAY_MS * 2);
    expect(layer.shown).toBeNull();
  });

  it('a press during the wait cancels it too', () => {
    layer.point(owner, '', says('Menu'), { x: 105, y: 15 });
    vi.advanceTimersByTime(200);
    layer.dismiss();
    vi.advanceTimersByTime(TOOLTIP_DELAY_MS);
    expect(layer.shown).toBeNull();
  });

  it('speaks again once the pointer has left and come back', () => {
    layer.point(owner, '', says('Menu'), { x: 105, y: 15 });
    layer.dismiss();
    layer.leave(owner);
    layer.point(owner, '', says('Menu'), { x: 105, y: 15 });
    vi.advanceTimersByTime(TOOLTIP_DELAY_MS);
    expect(layer.shown?.text).toBe('Menu');
  });

  it('moves on to the next control, with a wait of its own', () => {
    const other = {};
    layer.point(owner, '', says('Undo'), { x: 105, y: 15 });
    vi.advanceTimersByTime(TOOLTIP_DELAY_MS);
    layer.point(other, '', says('Redo'), { x: 130, y: 15 });
    expect(layer.shown).toBeNull();
    vi.advanceTimersByTime(TOOLTIP_DELAY_MS);
    expect(layer.shown?.text).toBe('Redo');
  });

  it('tells the parts of one control apart by their key', () => {
    layer.point(owner, 'eye:0', says('Hide'), { x: 105, y: 15 });
    vi.advanceTimersByTime(TOOLTIP_DELAY_MS);
    layer.point(owner, 'cross:0', says('Remove'), { x: 130, y: 15 });
    expect(layer.shown).toBeNull();
    vi.advanceTimersByTime(TOOLTIP_DELAY_MS);
    expect(layer.shown?.text).toBe('Remove');
  });

  it('lies above whatever was put on the overlay since', () => {
    layer.point(owner, '', says('Menu'), { x: 105, y: 15 });
    vi.advanceTimersByTime(TOOLTIP_DELAY_MS);
    layer.leave(owner);
    const menu = overlay.addChild(new Container());
    layer.point(owner, '', says('Menu'), { x: 105, y: 15 });
    vi.advanceTimersByTime(TOOLTIP_DELAY_MS);
    expect(overlay.children.indexOf(menu)).toBe(0);
    expect(overlay.children.length).toBe(2);
  });
});

describe('what a button says', () => {
  it('is the tooltip it was given, asked anew each time', () => {
    let step = 'Move object';
    const button = new Button('', { width: 24, tooltip: () => `Undo ${step}` });
    expect(button.tooltipText()).toBe('Undo Move object');
    step = 'Paint tiles';
    expect(button.tooltipText()).toBe('Undo Paint tiles');
    expect(new Button('', { width: 24, tooltip: 'Menu' }).tooltipText()).toBe('Menu');
  });

  it('is nothing for a button whose caption says it all', () => {
    const button = new Button('Fit');
    button.resize(button.measure().w, 24);
    expect(button.tooltipText()).toBe('');
  });

  it('is the whole name where a tab had to cut it short', () => {
    const tab = new TabButton('A very long name of an asset');
    tab.resize(80, 24);
    expect(tab.shownText).not.toBe(tab.text);
    expect(tab.tooltipText()).toBe('A very long name of an asset');
    tab.resize(400, 24);
    expect(tab.tooltipText()).toBe('');
  });

  it('reports a rest to the shared layer and a leave when the pointer goes', () => {
    const point = vi.spyOn(tooltips, 'point').mockImplementation(() => undefined);
    const leave = vi.spyOn(tooltips, 'leave').mockImplementation(() => undefined);
    const button = new Button('', { width: 24, tooltip: 'Menu' });
    button.resize(24, 24);
    button.position.set(40, 8);
    button.emit('pointerover', { global: { x: 45, y: 12 } } as never);
    expect(point).toHaveBeenCalledTimes(1);
    const [owner, key, target] = point.mock.calls[0]!;
    expect(owner).toBe(button);
    expect(key).toBe('');
    expect(target()).toEqual({ text: 'Menu', anchor: { x: 40, y: 8, w: 24, h: 24 } });
    button.emit('pointerout', {} as never);
    expect(leave).toHaveBeenCalledWith(button);

    // A button with nothing to say asks for no sign at all.
    point.mockClear();
    const plain = new Button('Fit');
    plain.resize(60, 24);
    plain.emit('pointermove', { global: { x: 5, y: 5 } } as never);
    expect(point).not.toHaveBeenCalled();
    point.mockRestore();
    leave.mockRestore();
  });
});

describe('the marks of a list row', () => {
  it('say what a press does, each with the box of its own mark', () => {
    const point = vi.spyOn(tooltips, 'point').mockImplementation(() => undefined);
    const leave = vi.spyOn(tooltips, 'leave').mockImplementation(() => undefined);
    const list = new SortableList({
      onPick: () => undefined,
      onMove: () => undefined,
      onToggleHidden: () => undefined,
      onDuplicate: () => undefined,
      onRemove: () => undefined,
      onAdd: () => undefined,
      onRename: () => undefined,
      title: 'Layers',
    });
    list.setItems(
      [
        { id: 'a', label: 'A' },
        { id: 'b', label: 'B', hidden: true },
      ],
      [],
    );
    list.resize(200, list.measure().h);
    const head = list.measure().h - 60;
    const over = (x: number, y: number) => {
      point.mockClear();
      leave.mockClear();
      list.emit('pointermove', { global: { x, y } } as never);
      const call = point.mock.calls[0];
      return call ? { key: call[1], ...call[2]()! } : null;
    };
    // Rows are 30 high; from the right: cross 24, duplicate 22, eye 26.
    expect(over(190, head + 15)).toEqual({
      key: 'cross:0',
      text: 'Remove',
      anchor: { x: 176, y: head, w: 24, h: 30 },
    });
    expect(over(165, head + 15)).toMatchObject({ key: 'duplicate:0', text: 'Duplicate' });
    expect(over(140, head + 15)).toMatchObject({ key: 'eye:0', text: 'Hide' });
    expect(over(140, head + 45)).toMatchObject({
      key: 'eye:1',
      text: 'Show',
      anchor: { x: 128, y: head + 30, w: 26, h: 30 },
    });
    expect(over(190, head / 2)).toMatchObject({ key: 'add:-1', text: 'Add' });
    // The name and the band have words of their own.
    expect(over(40, head + 15)).toBeNull();
    expect(leave).toHaveBeenCalledWith(list);
    expect(over(40, head / 2)).toBeNull();
    point.mockRestore();
    leave.mockRestore();
  });
});

describe('what the buttons without a caption say', () => {
  const idle = { undo: null, redo: null, editing: true, paused: false };

  it('writes a shortcut behind the name, and nothing where there is none', () => {
    expect(withShortcut('Undo', 'Ctrl+Z')).toBe('Undo (Ctrl+Z)');
    expect(withShortcut('Menu')).toBe('Menu');
  });

  it('names the step undo and redo would take', () => {
    expect(toolbarTip('undo', { ...idle, undo: 'Paint tiles' })).toBe('Undo Paint tiles (Ctrl+Z)');
    expect(toolbarTip('redo', { ...idle, redo: 'Move object' })).toBe('Redo Move object (Ctrl+Y)');
    expect(toolbarTip('undo', idle)).toBe('Undo (Ctrl+Z)');
    expect(toolbarTip('redo', idle)).toBe('Redo (Ctrl+Y)');
  });

  it('follows the run: play becomes stop, pause becomes resume', () => {
    expect(toolbarTip('menu', idle)).toBe('Menu');
    expect(toolbarTip('play', idle)).toBe('Play (Ctrl+Enter)');
    expect(toolbarTip('play', { ...idle, editing: false })).toBe('Stop (Esc)');
    expect(toolbarTip('pause', { ...idle, editing: false })).toBe('Pause (Ctrl+Enter)');
    expect(toolbarTip('pause', { ...idle, editing: false, paused: true })).toBe('Resume (Ctrl+Enter)');
  });

  it('takes the names from the command stack, the last step first', () => {
    const { project } = makeSpriteScene();
    const stack = new CommandStack(project);
    const step = (label: string) => ({ label, execute: () => undefined, undo: () => undefined });
    expect(stack.undoLabel).toBeNull();
    expect(stack.redoLabel).toBeNull();
    stack.execute(step('First'));
    stack.execute(step('Second'));
    expect(stack.undoLabel).toBe('Second');
    stack.undo();
    expect(stack.undoLabel).toBe('First');
    expect(stack.redoLabel).toBe('Second');
  });

  it('gives a row action the name of the one thing it does, else that of its group', () => {
    const action = (label: string) => ({ label, onSelect: () => undefined });
    expect(rowActionTip('Reset', [action('Reset to the asset')])).toBe('Reset to the asset');
    expect(rowActionTip('Reset', [action('Reset to the asset'), action('Reset all')])).toBe('Reset');
    expect(rowActionTip('Reset', [])).toBe('Reset');
  });

  it('names the nine anchor squares', () => {
    expect(anchorName({ x: 0, y: 0 })).toBe('Top left');
    expect(anchorName({ x: 0.5, y: 0 })).toBe('Top centre');
    expect(anchorName({ x: 1, y: 0.5 })).toBe('Middle right');
    expect(anchorName({ x: 0.5, y: 0.5 })).toBe('Centre');
    expect(anchorName({ x: 0, y: 1 })).toBe('Bottom left');
  });
});