// tests/welcome/inline-svg.test.ts — Plan 04-06 Wave 0 RED → GREEN unit test
// for the UI-SPEC dark-logo `currentColor` strategy (Option A).
//
// SCOPE — source-contract pin only (node-env file-read + string assertions).
//
// vitest is configured with `environment: 'node'` (vitest.config.ts:18) and
// the project ships no DOM-emulation library — neither jsdom, happy-dom nor
// linkedom is in node_modules. This test pins the SOURCE TEXT contract of
// the inline-SVG injection strategy (the SVG source carries the
// `currentColor` stroke, welcome.ts uses the `?raw` import + DOMParser +
// replaceChildren, globals.d.ts declares the `*.svg?raw` ambient module).
//
// It does NOT instantiate any document, does NOT call populateMark, does
// NOT invoke DOMParser at runtime. The runtime behavior (live <svg>
// injection into the welcome page DOM and the currentColor CSS cascade
// through `.welcome-hero__mark { color: var(--mks-fg-inverse); }`) is
// verified by the host-side UAT harness assertion A35 (driveA35 in
// tests/uat/lib/harness-page-driver.ts) — A35 opens welcome.html as a real
// Puppeteer tab so populateMark() actually runs, then reads
// `getComputedStyle().stroke` on the injected <svg> to prove the cascade
// resolves. This split mirrors the project's two-layer test approach
// (source contract under vitest + live-DOM behavior under the Puppeteer
// harness) — verified at re-plan iter-2 (BLOCKER 1 resolution).
//
// References:
//   - .planning/phases/04-harden-clean-up-optional/04-UI-SPEC.md
//     §"Implementation amendment" (currentColor + inline <svg> technique)
//   - .planning/phases/04-harden-clean-up-optional/04-RESEARCH.md
//     §SVG currentColor cascade (W3C SVG2 §13.3)
//   - tests/i18n/manifest-i18n.test.ts (the canonical node-env file-read
//     + string-assertion scaffold this test mirrors).
//   - https://vite.dev/guide/assets.html#importing-asset-as-string
//     (Vite `?raw` query suffix returns module content as a string).

import { describe, expect, it } from 'vitest';
import { readFileSync } from 'node:fs';
import { resolve as resolvePath } from 'node:path';

const MARK_SVG_PATH = resolvePath(
  process.cwd(),
  'src/shared/brand/mokosh-mark.svg',
);
const WELCOME_TS_PATH = resolvePath(process.cwd(), 'src/welcome/welcome.ts');
const GLOBALS_DTS_PATH = resolvePath(process.cwd(), 'globals.d.ts');

describe('UI-SPEC dark-logo currentColor strategy — source-level contract', () => {
  it('mokosh-mark.svg: root <svg> uses stroke="currentColor" + canonical viewBox; legacy #181b2a stroke removed', () => {
    const text = readFileSync(MARK_SVG_PATH, 'utf8');
    expect(text).toContain('stroke="currentColor"');
    expect(text).toContain('viewBox="0 0 32 32"');
    expect(text).not.toContain('stroke="#181b2a"');
  });

  it('welcome.ts: uses `?raw` import + DOMParser + replaceChildren; no `?url` import, no innerHTML (MV3 CSP discipline / T-04-06-01)', () => {
    const text = readFileSync(WELCOME_TS_PATH, 'utf8');
    expect(text).toContain('mokosh-mark.svg?raw');
    expect(text).toContain('DOMParser');
    expect(text).toContain('replaceChildren');
    expect(text).not.toContain('mokosh-mark.svg?url');
    expect(text).not.toContain('innerHTML');
  });

  it('globals.d.ts: declares the `*.svg?raw` ambient module (mirror of the existing `*.svg?url` block)', () => {
    const text = readFileSync(GLOBALS_DTS_PATH, 'utf8');
    expect(text).toContain("declare module '*.svg?raw'");
  });
});