// @vitest-environment jsdom

import { act, render } from '@testing-library/react';
import { afterEach, describe, expect, it, vi } from 'vitest';

import type { TextComponent } from '../src/features/ui-editor/types/TextComponent';
import {
  findLargestFittingFontSize,
  fontFamilyToCss,
  fontStyleToCss,
  SYSTEM_UI_FONT_STACK,
} from '../src/features/ui-editor/utils/textStyleToCss';
import { TextComponentView } from '../src/view/ui-editor/components/preview/components/TextComponentView';

function text(overrides: Partial<TextComponent> = {}): TextComponent {
  return {
    content: '测试文本',
    font: 'SystemFont',
    font_style: 'Normal',
    font_sizing: { Fixed: 14 },
    color: [0, 0, 0, 255],
    alignment: 'UpperLeft',
    horizontal_overflow: 'Wrap',
    vertical_overflow: 'Truncate',
    line_spacing: 1,
    ...overrides,
  };
}

const resources = {
  previewUrls: {},
  sprites: {},
  fontFaces: {},
};

afterEach(() => {
  vi.unstubAllGlobals();
});

describe('UI 编辑器文本样式算法', () => {
  it.each([
    ['Normal', { fontStyle: 'normal', fontWeight: 400 }],
    ['Bold', { fontStyle: 'normal', fontWeight: 700 }],
    ['Italic', { fontStyle: 'italic', fontWeight: 400 }],
    ['BoldItalic', { fontStyle: 'italic', fontWeight: 700 }],
  ] as const)('maps %s to browser font properties', (style, expected) => {
    expect(fontStyleToCss(style)).toEqual(expected);
  });

  it('uses a loaded bound font and falls back for all other states', () => {
    expect(
      fontFamilyToCss(
        { Bound: 'body' },
        {
          body: { cssFamily: 'ui-editor-font-body', status: 'loaded' },
        },
      ),
    ).toBe('ui-editor-font-body');
    for (const status of ['loading', 'error'] as const) {
      expect(
        fontFamilyToCss(
          { Bound: 'body' },
          {
            body: { cssFamily: 'ui-editor-font-body', status },
          },
        ),
      ).toBe(SYSTEM_UI_FONT_STACK);
    }
    expect(fontFamilyToCss({ Bound: 'missing' }, {})).toBe(
      SYSTEM_UI_FONT_STACK,
    );
  });

  it('finds the greatest fitting integer and retains min if none fits', () => {
    expect(findLargestFittingFontSize(8, 20, (size) => size <= 15)).toBe(15);
    expect(findLargestFittingFontSize(8, 20, () => false)).toBe(8);
  });
});

describe('TextComponentView', () => {
  it('applies a loaded bound font and font style to the preview', () => {
    render(
      <TextComponentView
        component={text({
          font: { Bound: 'body' },
          font_style: 'BoldItalic',
        })}
        resources={{
          ...resources,
          fontFaces: {
            body: { cssFamily: 'ui-editor-font-body', status: 'loaded' },
          },
        }}
      />,
    );
    const view = document.querySelector(
      '[data-component-kind="Text"]',
    ) as HTMLDivElement;
    expect(view.style.fontFamily).toBe('ui-editor-font-body');
    expect(view.style.fontStyle).toBe('italic');
    expect(view.style.fontWeight).toBe('700');
  });

  it('recalculates BestFit after its container is measured and resized', () => {
    let observerCallback: ResizeObserverCallback | undefined;
    class TestResizeObserver {
      constructor(callback: ResizeObserverCallback) {
        observerCallback = callback;
      }
      observe = vi.fn();
      disconnect = vi.fn();
    }
    vi.stubGlobal('ResizeObserver', TestResizeObserver);
    render(
      <TextComponentView
        component={text({ font_sizing: { BestFit: { min: 8, max: 20 } } })}
        resources={resources}
      />,
    );
    const view = document.querySelector(
      '[data-component-kind="Text"]',
    ) as HTMLDivElement;
    const measurement = document.querySelector(
      '[data-ui-editor-best-fit-measurement="true"]',
    ) as HTMLDivElement;
    let width = 120;
    Object.defineProperty(view, 'clientWidth', {
      configurable: true,
      get: () => width,
    });
    Object.defineProperty(view, 'clientHeight', {
      configurable: true,
      get: () => 24,
    });
    Object.defineProperty(measurement, 'scrollWidth', {
      configurable: true,
      get: () => Number.parseInt(measurement.style.fontSize, 10) * 8,
    });
    Object.defineProperty(measurement, 'scrollHeight', {
      configurable: true,
      get: () => 20,
    });

    act(() => observerCallback?.([], {} as ResizeObserver));
    expect(view.style.fontSize).toBe('15px');
    width = 72;
    act(() => observerCallback?.([], {} as ResizeObserver));
    expect(view.style.fontSize).toBe('9px');
  });

  it('does not restart BestFit measurement when an equivalent component is cloned', () => {
    const observers: Array<{ disconnect: ReturnType<typeof vi.fn> }> = [];
    class TestResizeObserver {
      readonly disconnect = vi.fn();

      constructor(_callback: ResizeObserverCallback) {
        observers.push(this);
      }

      observe = vi.fn();
    }
    vi.stubGlobal('ResizeObserver', TestResizeObserver);
    const original = text({ font_sizing: { BestFit: { min: 8, max: 20 } } });
    const view = render(
      <TextComponentView component={original} resources={resources} />,
    );

    view.rerender(
      <TextComponentView
        component={structuredClone(original)}
        resources={resources}
      />,
    );

    expect(observers).toHaveLength(1);
    expect(observers[0]!.disconnect).not.toHaveBeenCalled();
  });
});