import { existsSync } from 'node:fs';
import { resolve } from 'node:path';
import { describe, expect, it, vi } from 'vitest';
import {
  ICONS,
  INKSCAPE_CANDIDATES,
  exportArgs,
  findInkscape,
  makeIcons,
} from './make-icons.mjs';

/**
 * The PNG icons are rendered from SVG by Inkscape rather than checked in by
 * hand, so the manifest, the service worker and the HTML can keep pointing at
 * the same filenames while the mark changes. These tests pin the plan (which
 * file comes from which source, at what size) and the Inkscape invocation;
 * they never run Inkscape.
 */

const ROOT = resolve(__dirname, '..');

describe('ICONS', () => {
  it('covers every raster icon the app references, from a source that exists', () => {
    const outs = ICONS.map((i) => i.out);
    expect(outs).toEqual(
      expect.arrayContaining([
        'public/favicon-32.png',
        'public/apple-touch-icon.png',
        'public/icon-192.png',
        'public/icon-512.png',
        'public/icon-512-maskable.png',
      ]),
    );
    for (const icon of ICONS) {
      expect(existsSync(resolve(ROOT, icon.source)), icon.source).toBe(true);
    }
  });

  it('renders the tab favicon from the bare mark and the app icons from the opaque source', () => {
    const favicon = ICONS.find((i) => i.out === 'public/favicon-32.png');
    expect(favicon?.source).toBe('public/favicon.svg');
    expect(favicon?.size).toBe(32);
    for (const out of ['public/apple-touch-icon.png', 'public/icon-192.png', 'public/icon-512.png']) {
      expect(ICONS.find((i) => i.out === out)?.source).toBe('scripts/icons/app-icon.svg');
    }
    expect(ICONS.find((i) => i.out === 'public/icon-512-maskable.png')?.source).toBe(
      'scripts/icons/app-icon-maskable.svg',
    );
  });
});

describe('findInkscape', () => {
  it('prefers an explicit INKSCAPE variable', () => {
    expect(findInkscape({ INKSCAPE: 'D:\\tools\\inkscape.com' }, () => true)).toBe(
      'D:\\tools\\inkscape.com',
    );
  });

  it('falls back to the first standard install location that exists', () => {
    const second = INKSCAPE_CANDIDATES[1]!;
    expect(findInkscape({}, (p: string) => p === second)).toBe(second);
  });

  it('falls back to PATH lookup when nothing is installed in a standard place', () => {
    expect(findInkscape({}, () => false)).toBe('inkscape');
  });
});

describe('exportArgs', () => {
  it('builds an Inkscape 1.x PNG export at the requested square size', () => {
    expect(exportArgs({ source: 'in.svg', out: 'out.png', size: 180 })).toEqual([
      'in.svg',
      '--export-type=png',
      '--export-filename=out.png',
      '--export-width=180',
      '--export-height=180',
    ]);
  });
});

describe('makeIcons', () => {
  it('runs one export per icon, with paths resolved against the project root', () => {
    const run = vi.fn();
    const log = vi.spyOn(console, 'log').mockImplementation(() => {});
    try {
      makeIcons(ROOT, run);
    } finally {
      log.mockRestore();
    }
    expect(run).toHaveBeenCalledTimes(ICONS.length);
    const [, args, opts] = run.mock.calls[0]!;
    expect(args[0]).toBe(resolve(ROOT, ICONS[0]!.source));
    expect(args).toContain(`--export-filename=${resolve(ROOT, ICONS[0]!.out)}`);
    expect(opts).toEqual({ stdio: 'inherit' });
  });
});