import fs from 'node:fs';
import path from 'node:path';
import { readIndexedTask, verifyTaskIndex, root } from './task-context-lib.mjs';

const taskArg = process.argv.indexOf('--task');
const task = taskArg >= 0 ? process.argv[taskArg + 1] : undefined;
if (!task) throw new Error('usage: node tools/web/generate-task-card.mjs --task <task-id>');
verifyTaskIndex();
const entry = readIndexedTask(task);
if (!entry) throw new Error('unknown indexed task: ' + task);
const cardPath = path.join(root, 'docs/tasks', task + '.md');
if (fs.existsSync(cardPath) && !process.argv.includes('--force')) {
  process.stdout.write('task-card-exists task=' + task + ' path=' + path.relative(root, cardPath) + '\n');
  process.exit(0);
}
if (!entry.previous) throw new Error('task ' + task + ' has no indexed parent');
const safeName = entry.gapId.replace(/[^A-Za-z0-9_.-]+/g, '-').replace(/^-+|-+$/g, '') || 'gap';
const fixture = 'tests/files/web/generated/' + task + '-' + safeName + '.blend';
const source = [
  '# ' + task + ': ' + entry.gapId + ' LOCAL_EXACT slice', '',
  '- task: ' + task, '- parent: ' + entry.previous, '- status: in_progress',
  '- gap: ' + entry.gapId, '- ownerFamily: ' + entry.ownerFamily,
  '- targetImplementationClass: ' + entry.targetImplementationClass, '',
  '## 目标', '',
  'Make the same minimal fixture produce observable ' + entry.gapId + ' data in Blender desktop and WASM/Main, with save/reopen stability. Change only this gap; do not expand to other data-blocks, editors, or browsers.', '',
  '## 输入与范围', '',
  '- Fixture: `' + fixture + '`',
  '- Generator: `tools/web/generated/' + task + '.py`',
  '- Production: `blender-5.2.0/source/blender/web_engine/web_engine_blend_reader.cpp`',
  '- Checker: `tools/web/check-generated-gap.mjs`',
  '- Do: field read, desktop/WASM comparison, save/reopen, structured report.',
  '- Do not: other gaps, Firefox/WebKit, or full editor behavior.', '',
  '## 验收', '',
  'build_blender_5.2.0/bin/blender -b --factory-startup --python tools/web/generated/' + task + '.py -- ' + fixture,
  'npm --prefix web run test:generated-gap -- --task ' + task,
  'node tools/web/check-generated-gap.mjs --task ' + task, '',
  'Malformed/unsupported, cancellation, duplicate, over-budget, or hash-drift cases must keep in_progress; they must not change Main revision or advance nextTask.', '',
  '## 交付与回滚', '',
  '- Reports: `tests/golden/' + task + '/`', '- Status: `docs/status/' + task + '.md`',
  '- Manifest: `tests/golden/' + task + '/manifest.json`',
  '- Handoff: `node tools/web/check-task-context.mjs --task ' + task + ' --write`',
  '- Rollback: remove this task production entry, fixture, tests, reports, manifest, status, and context; restore the parent as queue tail without rewriting parent evidence.',
].join('\n') + '\n';
fs.mkdirSync(path.dirname(cardPath), { recursive: true });
fs.writeFileSync(cardPath, source);
process.stdout.write('task-card-generated task=' + task + ' bytes=' + Buffer.byteLength(source) + ' path=' + path.relative(root, cardPath) + '\n');