/** Free regression coverage for the file bundle sent to workflow judges. */
import { afterEach, describe, expect, test } from 'bun:test';
import { mkdirSync, mkdtempSync, readFileSync, readdirSync, rmSync, writeFileSync } from 'node:fs';
import { tmpdir } from 'node:os';
import { dirname, join, resolve } from 'node:path';
import { createHash } from 'node:crypto';
import { readWorkflowJudgeInput, buildWorkflowJudgePrompt, QA_DISCOVERY_REFERENCES } from './helpers/workflow-judge-input';
import { ENG_REVIEW_EXCERPT } from './helpers/workflow-excerpt';

const ROOT = resolve(import.meta.dir, '..');
const scratchRoots: string[] = [];

test('cache extraction preserves every byte of the original workflow request and rubric', () => {
  // Captured from runWorkflowJudge's pre-cache template literal, not from the
  // new builder: moving request construction must not change the paid metric.
  const prompt = buildWorkflowJudgePrompt({ judgeContext: 'test workflow', judgeGoal: 'test goal' },
    { files: [], text: 'full prompt\nincluding lines' });
  expect(createHash('sha256').update(prompt).digest('hex')).toBe('71cc9c777bf28ff0efd610259b411e3539852f83a0888fa0e92469331f8b9a43');
});

test.each(['ship', 'review'])('%s clarity targets frontier readers without excusing missing decisions or authority', skill => {
  const source = readFileSync(join(ROOT, 'test/skill-llm-eval.test.ts'), 'utf8');
  const registration = source.match(new RegExp(`testIfSelected\\('${skill}/SKILL\\.md workflow',[\\s\\S]*?await runWorkflowJudge\\(\\{([\\s\\S]*?)\\n    \\}\\);`));
  expect(registration).not.toBeNull();
  const options = new Function('QA_DISCOVERY_REFERENCES', `return ({${registration![1]}});`)(QA_DISCOVERY_REFERENCES);
  expect(options.agentCapability).toBe('frontier');
  expect(options.thresholds).toBeUndefined();
  const input = readWorkflowJudgeInput({ root: ROOT, ...options });
  const prompt = buildWorkflowJudgePrompt(options, input);
  expect(prompt).toContain('GPT-5.6 Sol-level capability or stronger');
  expect(prompt).toContain('Length, technical vocabulary and multiple explicit recovery paths alone are not clarity defects');
  expect(prompt).toContain('Do not invent missing policies, permissions or evidence');
  expect(prompt).toContain('Clarity 4 means the target agent can determine the next permitted action on each applicable path');
  expect(prompt).toContain('Score clarity 3 or lower when execution still requires guessing');
  expect(prompt).toContain('conflicting order, undefined decisions, unclear authority or missing input/output handling');
  expect(prompt).toContain('cite the specific file/step and explain the competing actions or missing decision');
  expect(prompt.endsWith(input.text)).toBe(true);
  expect(prompt).toContain('"clarity": N, "completeness": N, "actionability": N, "reasoning": "brief explanation"');
});

test('frontier calibration bounds reporting without reducing the evaluated source bundle', () => {
  const input = { files: [], text: 'Entire source bundle remains present.' };
  const prompt = buildWorkflowJudgePrompt({ judgeContext: 'a workflow', judgeGoal: 'how to finish', agentCapability: 'frontier' }, input);
  expect(prompt).toContain('Evaluate the whole workflow, but keep the JSON reasoning under 150 words with at most two decisive examples');
  expect(prompt).toContain('For a clarity defect, cite the specific file/step and explain the competing actions or missing decision');
  expect(prompt).not.toContain('For each clarity defect');
  expect(prompt.endsWith(input.text)).toBe(true);
});

afterEach(() => {
  for (const root of scratchRoots.splice(0)) rmSync(root, { recursive: true, force: true });
});

function fixture(files: Record<string, string>): string {
  const root = mkdtempSync(join(tmpdir(), 'gstack-workflow-judge-'));
  scratchRoots.push(root);
  for (const [path, content] of Object.entries(files)) {
    mkdirSync(dirname(join(root, path)), { recursive: true });
    writeFileSync(join(root, path), content);
  }
  return root;
}

function occurrences(text: string, needle: string): number {
  return text.split(needle).length - 1;
}

function sectionPaths(skill: string): string[] {
  return readdirSync(join(ROOT, skill, 'sections'))
    .filter(name => name.endsWith('.md'))
    .sort()
    .map(name => `${skill}/sections/${name}`);
}

describe('workflow judge file bundle', () => {
  test('the actual Eng judge registration includes authorization and the referenced final gate', () => {
    const source = readFileSync(join(ROOT, 'test/skill-llm-eval.test.ts'), 'utf8');
    const registration = source.match(/testIfSelected\('plan-eng-review\/SKILL\.md sections',[\s\S]*?await runWorkflowJudge\(\{([\s\S]*?)\n    \}\);/);
    expect(registration).not.toBeNull();
    const options = new Function('ENG_REVIEW_EXCERPT', `return ({${registration![1]}});`)(ENG_REVIEW_EXCERPT);
    const input = readWorkflowJudgeInput({ root: ROOT, ...options });
    const entry = input.files.find(file => file.kind === 'entrypoint')!;
    const complete = readFileSync(join(ROOT, options.skillPath), 'utf8');
    expect(entry.content).toBe(complete.slice(complete.indexOf('# Plan Review Mode')));
    expect(entry.content).toContain('Do not build features, acceptance suites or benchmarks unless explicitly authorized');
    expect(entry.content).toContain('## Scope gate');
    expect(entry.content).toContain('## Section self-check');
    expect(entry.content).toContain('## EXIT PLAN MODE GATE (BLOCKING)');
    expect(entry.content.trimEnd()).toMatch(/After success telemetry and cache dispatch, call ExitPlanMode[^\n]*\.$/);
  });

  test('preserves the exact entrypoint excerpt and each complete section in sorted named files', () => {
    const entrypoint = 'excluded preamble\n## Begin\nRead sections/z-last.md when directed.\n## End\nexcluded epilogue';
    const sections = {
      'example/sections/z-last.md': 'Z section prefix\nZ section suffix',
      'example/sections/a-first.md': 'A section prefix\nA section suffix',
    };
    const root = fixture({
      'example/SKILL.md': entrypoint,
      ...sections,
      'example/sections/ignored.md.tmpl': 'DO NOT EVALUATE TEMPLATE',
      'example/sections/manifest.json': '{"ignored": true}',
    });
    const input = readWorkflowJudgeInput({ root, skillPath: 'example/SKILL.md', startMarker: '## Begin', endMarker: '## End' });

    expect(input.files).toEqual([
      { path: 'example/SKILL.md', kind: 'entrypoint', content: '## Begin\nRead sections/z-last.md when directed.\n', startLine: 2, endLine: 3 },
      { path: 'example/sections/a-first.md', kind: 'section', content: sections['example/sections/a-first.md'], startLine: 1, endLine: 2 },
      { path: 'example/sections/z-last.md', kind: 'section', content: sections['example/sections/z-last.md'], startLine: 1, endLine: 2 },
    ]);
    expect(input.text).not.toContain('excluded preamble');
    expect(input.text).not.toContain('excluded epilogue');
    expect(input.text).not.toContain('DO NOT EVALUATE TEMPLATE');
    expect(input.text).not.toContain('manifest.json');
    for (const file of input.files) {
      expect(occurrences(input.text, file.content)).toBe(1);
      const begin = input.text.split('\n').filter(line => line.includes('BEGIN FILE') && line.includes(file.path));
      const end = input.text.split('\n').filter(line => line.includes('END FILE') && line.includes(file.path));
      expect(begin).toHaveLength(1);
      expect(end).toHaveLength(1);
      expect(begin[0]).toContain(`${file.startLine}-${file.endLine}`);
    }
  });

  test('describes lazy file loading without presenting bundle order as execution order', () => {
    const root = fixture({
      'example/SKILL.md': '## Begin\nSTOP and read sections/step.md.\n## End',
      'example/sections/step.md': 'Run the separately loaded step.',
    });
    const { text } = readWorkflowJudgeInput({ root, skillPath: 'example/SKILL.md', startMarker: '## Begin', endMarker: '## End' });
    const header = text.slice(0, text.indexOf('BEGIN FILE'));
    expect(header).toMatch(/bundle/i);
    expect(header).toMatch(/file/i);
    expect(header).toMatch(/separate|separately/i);
    expect(header).toMatch(/lazy|on-demand/i);
    expect(header).toMatch(/directives|instructions/i);
    expect(header).toMatch(/(?:not|isn't|does not)[^.\n]*execution order/i);
    expect(text).toContain('STOP and read sections/step.md.');
  });

  test('cross-skill references retain complete bytes once and fail on missing assets', () => {
    const root = fixture({
      'example/SKILL.md': '## Begin\nRead the shared resource.\n## End',
      'example/sections/local.md': 'Complete local section.',
      'shared/sections/method.md': 'Shared prefix\n## End\nShared suffix',
    });
    const options = { root, skillPath: 'example/SKILL.md', startMarker: '## Begin', endMarker: '## End',
      references: ['example/sections/local.md', 'shared/sections/method.md', 'shared/sections/method.md'] };
    const input = readWorkflowJudgeInput(options);
    expect(input.files.filter(file => file.kind === 'reference')).toEqual([
      { path: 'shared/sections/method.md', kind: 'reference', content: 'Shared prefix\n## End\nShared suffix', startLine: 1, endLine: 3 },
    ]);
    expect(input.files.filter(file => file.path === 'example/sections/local.md')).toHaveLength(1);
    expect(occurrences(input.text, 'Shared prefix')).toBe(1);
    expect(() => readWorkflowJudgeInput({ ...options, references: ['shared/missing.md'] })).toThrow();
    expect(() => readWorkflowJudgeInput({ ...options, references: ['../outside.md'] })).toThrow('Reference outside root');
  });

  for (const skill of ['ship', 'qa-only', 'document-release', 'review']) {
    test(`actual ${skill} judge includes all referenced QA or documentation sections`, () => {
      const caller = readFileSync(join(ROOT, 'test/skill-llm-eval.test.ts'), 'utf8');
      const name = `${skill}/SKILL.md workflow`;
      const start = caller.indexOf(`testIfSelected('${name}'`);
      expect(start).toBeGreaterThanOrEqual(0);
      const registration = caller.slice(start).match(/await runWorkflowJudge\(\{([\s\S]*?)\n    \}\);/);
      expect(registration).not.toBeNull();
      const options = new Function('QA_DISCOVERY_REFERENCES', `return ({${registration![1]}});`)(QA_DISCOVERY_REFERENCES);
      const input = readWorkflowJudgeInput({ root: ROOT, ...options });
      for (const file of options.references ?? []) {
        expect(input.files.find(item => item.path === file)?.content).toBe(readFileSync(join(ROOT, file), 'utf8'));
      }
      if (skill === 'ship') {
        expect(input.files.map(file => file.path)).toContain('ship/sections/documentation.md');
        expect(input.files.map(file => file.path)).toContain('qa/sections/exploratory.md');
      } else if (skill === 'qa-only') {
        expect(input.files.map(file => file.path)).toContain('qa/sections/system-functional.md');
        expect(input.files.filter(file => file.path.endsWith('/exploratory.md'))).toHaveLength(1);
        expect(input.files.find(file => file.kind === 'entrypoint')?.content).toContain('Never fix bugs or write product tests');
      } else if (skill === 'document-release') {
        expect(input.files.map(file => file.path)).toContain('document-release/sections/audit-scope.md');
        expect(input.text).toContain('Ship-owned documentation mode');
      } else {
        expect(input.files.map(file => file.path)).toContain('qa/sections/exploratory.md');
        expect(input.files.map(file => file.path)).toContain('review/checklist.md');
        expect(input.text).toContain('test_stub');
        expect(input.text).toContain('## Step 5: Fix-First Review');
      }
    });
  }

  test('retains section prelude and suffix exactly once when both markers are inside a section', () => {
    // Generated comments made the old 120-character prefix heuristic append
    // this whole file after its partial slice, duplicating every review pass.
    const section = [
      '<!-- AUTO-GENERATED from review-sections.md.tmpl — do not edit directly -->',
      '<!-- Regenerate: bun run gen:skill-docs -->',
      'section context before the selected marker',
      '## Review Sections',
      '### Pass 1: Information Architecture',
      'Evaluate the first pass.',
      '## CRITICAL RULE',
      'section context after the selected marker',
    ].join('\n');
    const root = fixture({
      'example/SKILL.md': 'Entrypoint preamble.\nSTOP and read sections/review-sections.md.',
      'example/sections/review-sections.md': section,
    });
    const input = readWorkflowJudgeInput({ root, skillPath: 'example/SKILL.md', startMarker: '## Review Sections', endMarker: '## CRITICAL RULE' });

    expect(input.files).toEqual([
      { path: 'example/sections/review-sections.md', kind: 'section', content: section, startLine: 1, endLine: 8 },
    ]);
    expect(occurrences(input.text, '### Pass 1: Information Architecture')).toBe(1);
    expect(occurrences(input.text, 'section context before the selected marker')).toBe(1);
    expect(occurrences(input.text, 'section context after the selected marker')).toBe(1);
    expect(occurrences(input.text, section)).toBe(1);
    expect(input.text).not.toContain('Entrypoint preamble.');
  });

  test('handles marker windows spanning files without losing section prefixes or suffixes', () => {
    const root = fixture({
      'example/SKILL.md': 'omitted\n## Begin\nEntrypoint tail',
      'example/sections/a.md': 'First section prefix\nFirst section body\nFirst section suffix',
      'example/sections/b.md': 'Second section prefix\n## End\nSecond section suffix',
    });
    const input = readWorkflowJudgeInput({ root, skillPath: 'example/SKILL.md', startMarker: '## Begin', endMarker: '## End' });

    expect(input.files[0]).toEqual({
      path: 'example/SKILL.md', kind: 'entrypoint', content: '## Begin\nEntrypoint tail', startLine: 2, endLine: 3,
    });
    expect(input.files.slice(1).map(file => file.content)).toEqual([
      'First section prefix\nFirst section body\nFirst section suffix',
      'Second section prefix\n## End\nSecond section suffix',
    ]);
    expect(occurrences(input.text, 'Second section prefix')).toBe(1);
    expect(occurrences(input.text, 'Second section suffix')).toBe(1);
  });

  test('keeps separate files even when their generated preludes and contents match', () => {
    const body = '<!-- AUTO-GENERATED -->\nShared instruction';
    const root = fixture({
      'example/SKILL.md': '## Begin\nRead both sections.\n## End',
      'example/sections/a.md': body,
      'example/sections/b.md': body,
    });
    const input = readWorkflowJudgeInput({ root, skillPath: 'example/SKILL.md', startMarker: '## Begin', endMarker: '## End' });
    expect(input.files.filter(file => file.kind === 'section').map(file => file.path)).toEqual([
      'example/sections/a.md', 'example/sections/b.md',
    ]);
    expect(occurrences(input.text, body)).toBe(2);
  });

  test('supports an uncarved workflow and an open-ended slice', () => {
    const root = fixture({ 'example/SKILL.md': 'omitted\n## Begin\nRetain this final line' });
    const input = readWorkflowJudgeInput({ root, skillPath: 'example/SKILL.md', startMarker: '## Begin', endMarker: null });
    expect(input.files).toEqual([
      { path: 'example/SKILL.md', kind: 'entrypoint', content: '## Begin\nRetain this final line', startLine: 2, endLine: 3 },
    ]);
  });

  test('rejects missing start markers, missing end markers, and end markers preceding the start', () => {
    const root = fixture({ 'example/SKILL.md': '## Earlier\n## Begin\nBody' });
    expect(() => readWorkflowJudgeInput({ root, skillPath: 'example/SKILL.md', startMarker: '## Missing', endMarker: null })).toThrow(/Start marker not found/);
    expect(() => readWorkflowJudgeInput({ root, skillPath: 'example/SKILL.md', startMarker: '## Begin', endMarker: '## Missing' })).toThrow(/End marker not found/);
    expect(() => readWorkflowJudgeInput({ root, skillPath: 'example/SKILL.md', startMarker: '## Begin', endMarker: '## Earlier' })).toThrow(/End marker not found/);
  });

  test('generated ship includes base-branch initialization and every lazy section once', () => {
    const skillPath = 'ship/SKILL.md';
    const source = readFileSync(join(ROOT, skillPath), 'utf8');
    // Bind to the paid caller's actual slice and retain both the opening contract
    // and initialization, regardless of their ordering in the authored workflow.
    const caller = readFileSync(join(ROOT, 'test/skill-llm-eval.test.ts'), 'utf8');
    const markers = caller.match(/skillPath: 'ship\/SKILL\.md',\s+startMarker: '([^']+)',\s+endMarker: '([^']+)'/);
    expect(markers).not.toBeNull();
    const [, startMarker, endMarker] = markers!;
    expect(startMarker).toBe('# Ship:');
    const input = readWorkflowJudgeInput({ root: ROOT, skillPath, startMarker, endMarker });
    const entrypoint = input.files.find(file => file.kind === 'entrypoint');
    expect(entrypoint?.content).toBe(source.slice(source.indexOf(startMarker), source.indexOf(endMarker, source.indexOf(startMarker))));
    expect(entrypoint?.content).toContain('git remote get-url origin');
    expect(entrypoint?.content).toContain('STOP blocks advancement until the stated repair/resume route clears; without one, end this attempt');
    const flow = entrypoint!.content.replace(/\s+/g, ' ');
    expect(flow).toContain('Every new invocation repeats Steps 1–16, including both reviews and the docs audit');
    expect(flow).toContain('children return evidence, not permission to proceed');
    expect(flow).toContain('Follow the saved work list');
    expect(flow).not.toContain('| At step | Outcome |');
    expect(flow).toContain('`gstack-wtree` prints a Git tree hash');
    expect(flow).toContain('Offline output without that fallback, failure, malformed output or an empty version is unusable');
    expect(entrypoint?.content).toContain('Answer each AskUserQuestion before continuing');
    expect(entrypoint?.content).toContain('Routine authorization never waives those gates or their required user decisions');
    expect(entrypoint?.content).toContain('## Step 0: Detect platform and base branch');
    expect(entrypoint?.content).toContain('gh pr view --json baseRefName');
    expect(entrypoint?.content).toContain('Print the detected base branch name.');
    expect(occurrences(input.text, startMarker)).toBe(1);
    const sections = input.files.filter(file => file.kind === 'section');
    expect(sections.map(file => file.path)).toEqual(sectionPaths('ship'));
    for (const file of sections) {
      const source = readFileSync(join(ROOT, file.path), 'utf8');
      expect(file.content).toBe(source);
      expect(occurrences(input.text, source)).toBe(1);
      expect(file.startLine).toBe(1);
    }
  });

  test('generated engineering review includes the scope choices and readiness probe its steps reference', () => {
    const skillPath = 'plan-eng-review/SKILL.md';
    const caller = readFileSync(join(ROOT, 'test/skill-llm-eval.test.ts'), 'utf8');
    const registration = caller.match(/testIfSelected\('plan-eng-review\/SKILL\.md sections',[\s\S]*?await runWorkflowJudge\(\{([\s\S]*?)\n    \}\);/);
    expect(registration).not.toBeNull();
    const options = new Function('ENG_REVIEW_EXCERPT', `return ({${registration![1]}});`)(ENG_REVIEW_EXCERPT);
    expect(ENG_REVIEW_EXCERPT.skillPath).toBe(skillPath);
    const input = readWorkflowJudgeInput({ root: ROOT, ...options });
    const entrypoint = input.files.find(file => file.kind === 'entrypoint')!;
    expect(entrypoint.content).toContain('B) A plan or design doc');
    expect(entrypoint.content).toContain('## Scope gate');
    expect(entrypoint.content.indexOf('## Scope gate')).toBeLessThan(entrypoint.content.indexOf('### Step 0: Scope Challenge'));
    expect(entrypoint.content).toContain('## Web research runs in Aside');
    expect(entrypoint.content).toContain('echo "READY: aside');
    expect(input.text.indexOf('echo "READY: aside')).toBeLessThan(input.text.indexOf('- **Search check:**'));
    expect(entrypoint.content).not.toContain('- **Search check:**');
    expect(occurrences(input.text, '- **Search check:**')).toBe(1);
    expect(occurrences(input.text, '## Scope gate')).toBe(1);
    expect(occurrences(input.text, '### 1. Architecture review')).toBe(1);
    const sections = input.files.filter(file => file.kind === 'section');
    expect(sections.map(file => file.path)).toEqual(sectionPaths('plan-eng-review'));
    for (const file of sections) {
      const source = readFileSync(join(ROOT, file.path), 'utf8');
      expect(file.content).toBe(source);
      expect(occurrences(input.text, source)).toBe(1);
    }
  });

  test('generated design consultation includes the prechecks its proposal and preview reference', () => {
    const skillPath = 'design-consultation/SKILL.md';
    const caller = readFileSync(join(ROOT, 'test/skill-llm-eval.test.ts'), 'utf8');
    const markers = caller.match(/skillPath: 'design-consultation\/SKILL\.md',\s+startMarker: '([^']+)',\s+endMarker: '([^']+)'/);
    expect(markers).not.toBeNull();
    const [, startMarker, endMarker] = markers!;
    const input = readWorkflowJudgeInput({ root: ROOT, skillPath, startMarker, endMarker });
    const entrypoint = input.files.find(file => file.kind === 'entrypoint')!;
    for (const prerequisite of ['## Phase 0: Pre-checks', 'DESIGN_MD_FORMAT:', 'DESIGN_READY', 'DESIGN_NOT_AVAILABLE']) {
      expect(entrypoint.content).toContain(prerequisite);
    }
    expect(entrypoint.content.indexOf('## Phase 0:')).toBeLessThan(entrypoint.content.indexOf('## Phase 1:'));
    expect(occurrences(input.text, '## Phase 0: Pre-checks')).toBe(1);
    const sections = input.files.filter(file => file.kind === 'section');
    expect(sections.map(file => file.path)).toEqual(sectionPaths('design-consultation'));
    for (const file of sections) {
      const source = readFileSync(join(ROOT, file.path), 'utf8');
      expect(file.content).toBe(source);
      expect(occurrences(input.text, source)).toBe(1);
    }
  });

  test('generated plan-design passes retain their full section without duplicating Pass 1', () => {
    const input = readWorkflowJudgeInput({
      root: ROOT, skillPath: 'plan-design-review/SKILL.md', startMarker: '## Review Sections', endMarker: '## CRITICAL RULE',
    });
    expect(input.files.filter(file => file.kind === 'entrypoint')).toHaveLength(0);
    expect(input.files.map(file => file.path)).toEqual(sectionPaths('plan-design-review'));
    const section = input.files.find(file => file.path === 'plan-design-review/sections/review-sections.md');
    expect(section?.content).toBe(readFileSync(join(ROOT, 'plan-design-review/sections/review-sections.md'), 'utf8'));
    expect(section?.content).toStartWith('<!-- AUTO-GENERATED');
    expect(section?.content).toContain('## CRITICAL RULE');
    expect(section?.content).toContain('## Formatting Rules');
    expect(occurrences(input.text, '### Pass 1: Information Architecture')).toBe(1);
  });
});