import test from 'node:test';
import assert from 'node:assert/strict';
import { existsSync, readFileSync } from 'node:fs';
import { join } from 'node:path';
import { runScript, repoRoot, tmpRoot } from './helpers/run-script.js';

const input = join(tmpRoot, 'capture-input.json');
const html = join(tmpRoot, 'capture.html');
const svg = join(tmpRoot, 'capture.svg');
const manifest = join(tmpRoot, 'capture-manifest.json');

const document = {
  schemaVersion: 1,
  source: { requirement: { repo: 'owner/repo', index: 7 } },
  requirement: { title: 'Capture', summary: 'Fallback', goals: [], nonGoals: [], diagrams: [{ kind: 'flowchart', nodes: [{ id: 'a', label: 'A' }], edges: [] }] },
  workPackages: [],
  overview: { generatedAt: '2026-09-18T00:00:00Z' },
};

import { mkdirSync, writeFileSync } from 'node:fs';
mkdirSync(tmpRoot, { recursive: true });
writeFileSync(input, `${JSON.stringify(document)}\n`);

test('renderer emits SVG fallback alongside HTML', async () => {
  const result = await runScript('overview-render.js', ['--input', input, '--output', html, '--svg', svg, '--manifest', manifest]);
  assert.equal(result.code, 0, JSON.stringify(result.json));
  assert.equal(existsSync(svg), true);
  assert.match(readFileSync(svg, 'utf8'), /^<svg/);
  assert.equal(result.json.data.svg, svg);
});

test('capture reports missing backend instead of claiming success', async () => {
  const result = await runScript('overview-capture.js', ['--backend', 'svg', '--svg', svg, '--output', join(tmpRoot, 'capture.png')]);
  if (result.code === 0) assert.equal(result.json.data.backend, 'svg');
  else assert.equal(result.json.error.code, 'BINARY_NOT_FOUND');
});