#!/usr/bin/env node
// Marketplace version-consistency gate.
//
// For every plugin in catalog/.claude-plugin/marketplace.json, compare its catalog `ref`
// against the plugin repo found as a sibling directory (../<name>):
//   - catalog ref must point at an existing git tag        → else ERROR (install-breaking)
//   - plugin.json version must equal the README version-badge → else ERROR (internal)
//   - catalog README per-plugin label must equal catalog ref → else ERROR (doc misstates install)
//   - catalog ref should equal plugin.json version          → else WARN (catalog lags / unreleased bump)
//   - sibling repo missing                                  → SKIP
//
// Exit 1 if any ERROR (or any WARN under --strict); 0 otherwise.
// Usage: node scripts/check-versions.mjs [--strict]
import { readFileSync, existsSync } from 'node:fs';
import { execFileSync } from 'node:child_process';
import { join, dirname } from 'node:path';
import { fileURLToPath, pathToFileURL } from 'node:url';

export function normalizeVersion(v) {
  return String(v).trim().replace(/^v/, '');
}

export function extractBadgeVersion(readmeText) {
  const m = /badge\/version-(\d+\.\d+\.\d+)/.exec(readmeText || '');
  return m ? m[1] : null;
}

// Read the catalog README's per-plugin version label, e.g.
//   ### [Config-Audit](https://.../open/config-audit) `v5.7.0`
// Matches the heading line by its `/open/<name>)` link and returns the FIRST `vX.Y.Z`
// token on it (so a trailing `🇳🇴 Norwegian`-style badge is ignored). null if no entry.
export function extractCatalogLabel(readmeText, name) {
  for (const line of String(readmeText || '').split('\n')) {
    if (line.includes(`/open/${name})`)) {
      const m = /`v(\d+\.\d+\.\d+)`/.exec(line);
      return m ? m[1] : null;
    }
  }
  return null;
}

// --- stat-badge mirroring -------------------------------------------------
//
// The catalog restates each plugin's counts in a per-plugin stat line
// ("7 agents · 16 scanners · 21 commands · 1410 tests · [Full documentation →]").
// Those numbers rot: measured 2026-08-02, config-audit's line said 1410 tests
// while the plugin's own badge said 1441. This mirrors catalog line -> plugin badge.
//
// The rule is PER-AXIS, not per-plugin. An axis is gated only when the plugin
// carries a badge for it; a badge-less axis is skipped silently. That is not a
// concession to voyage (the one plugin with no stat badges at all) — re-measured
// 2026-08-04 at the pinned refs, 15 of the 42 axis-claims across 7 of the 12
// plugins are badge-less, so a per-plugin exception list would have had to name
// most of the marketplace and be edited by hand forever. The cost is stated
// plainly: those 15 numbers stay ungated and need a human pass whenever a ref
// moves — repo-mailbox's `6 CLI scripts` was 8 when measured, and it badges both
// of its axes now, so they are gated as of v0.20.2. (Its selftest-check figure is
// the standing proof that ungated numbers rot: the catalog said 251 while three
// records of the true value disagree — see CLAUDE.md. Not re-measured.)

const AXIS_SYNONYM = { 'reference doc': 'reference', 'knowledge doc': 'reference', doc: 'reference' };

// Fold a badge label or a stat-line noun onto a shared axis name.
export function normalizeAxis(raw) {
  let s = String(raw || '').replace(/--/g, '-').replace(/%20/g, ' ').replace(/_/g, ' ')
    .toLowerCase().replace(/\s+/g, ' ').trim();
  s = s.replace(/\s+files?$/, '');
  const words = s.split(' ');
  const last = words[words.length - 1];
  if (last.length > 3 && last.endsWith('s') && !last.endsWith('ss')) words[words.length - 1] = last.slice(0, -1);
  s = words.join(' ');
  return AXIS_SYNONYM[s] || s;
}

// Plugin README -> Map(axis -> count). Only badges whose VALUE is an integer are
// stat axes; version/platform/license carry text and are ignored. Shields escapes
// a literal hyphen as `--`, so the label/value/color split must ignore doubled ones.
export function extractStatBadges(readmeText) {
  const out = new Map();
  for (const m of String(readmeText || '').matchAll(/img\.shields\.io\/badge\/([^)\s]+)/g)) {
    const parts = m[1].split(/(?<!-)-(?!-)/);
    if (parts.length < 3) continue;
    if (!/^\d+$/.test(parts[1])) continue;
    out.set(normalizeAxis(parts[0]), Number(parts[1]));
  }
  return out;
}

// Pull "<n> <axis>" pairs out of one `·`-separated segment, including any
// parenthetical aside ("5 skills (389 docs)" is two axes; "(+1 helper)" is one).
function readStatSegment(segment, out) {
  const asides = [...segment.matchAll(/\(([^)]*)\)/g)].map(a => a[1]);
  const main = segment.replace(/\([^)]*\)/g, ' ');
  for (const piece of [main, ...asides]) {
    const m = /(\d+)(\+?)\s+([A-Za-z][A-Za-z -]*)/.exec(piece);
    if (!m) continue;
    const axis = normalizeAxis(m[3]);
    if (!axis || out.has(axis)) continue;
    out.set(axis, m[2] === '+' ? { atLeast: Number(m[1]) } : Number(m[1]));
  }
}

// Which copy of the plugin README the stat mirror must read.
//
// The catalog documents what INSTALLS, and what installs is the pinned `ref` — not
// whatever the sibling working tree happens to hold. Measured live 2026-08-02:
// llm-security had committed past its v7.8.3 tag (scanners 23->22, tests 2013->2034)
// without bumping the version, so reading the working tree reported the catalog stale
// while the catalog was correct about v7.8.3. Fall back to the working tree only when
// the ref cannot be read at all — a ref that resolves to nothing is already its own
// ERROR (check 1), so this fallback never hides a dangling ref.
//
// Reading the ref decides COVERAGE too, not just values. Measured 2026-08-04:
// graceful-handoff had dropped its `tests-30` and `hooks-0` badges on main (13e2972,
// 5e17409) without releasing, so the working tree says the catalog's `30 tests` is
// ungated while at v3.1.0 it is badged and gated. The failure directions are opposite
// — the llm-security case above makes a correct catalog look stale — so neither one
// alone would have caught this.
export function pickStatSource({ atRef, atWorktree }) {
  return atRef !== null && atRef !== undefined ? atRef : (atWorktree ?? null);
}

// Catalog README -> Map(axis -> count | {atLeast}). Reads ONLY the stat line of the
// named plugin's block, so prose numbers above it can never be mistaken for counts.
export function extractCatalogStats(readmeText, name) {
  const lines = String(readmeText || '').split('\n');
  const out = new Map();
  let inBlock = false;
  for (const line of lines) {
    if (line.startsWith('### [')) inBlock = line.includes(`/open/${name})`);
    if (!inBlock || !line.includes('[Full documentation')) continue;
    for (const seg of line.split('[Full documentation')[0].split('·')) readStatSegment(seg, out);
  }
  return out;
}

// Pure classifier — all I/O is resolved into the input shape before this is called.
// tags === null means "repo not inspected" (missing locally); [] means "no tags".
export function classifyPlugin({ name, catalogRef, pluginVersion, readmeBadge, tags, catalogLabel = null, statBadges = null, catalogStats = null }) {
  if (pluginVersion === null && tags === null) {
    return { name, status: 'SKIP', findings: [{ level: 'SKIP', msg: 'plugin repo not found locally — cannot verify' }] };
  }

  const findings = [];

  if (pluginVersion === null) {
    findings.push({ level: 'ERROR', msg: 'plugin.json version not found or unparseable' });
  }

  // 1. dangling ref — catalog points at a tag that does not exist in the plugin repo
  if (tags !== null && !tags.includes(catalogRef)) {
    findings.push({ level: 'ERROR', msg: `catalog ref ${catalogRef} has no matching git tag in the plugin repo (install-breaking)` });
  }

  // 2. internal consistency — plugin.json version vs README version-badge
  if (pluginVersion !== null && readmeBadge !== null && pluginVersion !== readmeBadge) {
    findings.push({ level: 'ERROR', msg: `plugin.json version ${pluginVersion} != README version-badge ${readmeBadge}` });
  }

  // 3. catalog README label vs catalog ref — the human-facing doc must match what installs.
  // Unlike ref-vs-plugin.json, there is no legitimate transient state where these differ.
  if (catalogLabel !== null && normalizeVersion(catalogRef) !== catalogLabel) {
    findings.push({ level: 'ERROR', msg: `catalog README label v${catalogLabel} != catalog ref ${catalogRef} (README misstates the installed version)` });
  }

  // 4. catalog ref vs plugin.json version
  if (pluginVersion !== null && normalizeVersion(catalogRef) !== pluginVersion) {
    const releasedTag = tags !== null && tags.includes('v' + pluginVersion);
    const reason = releasedTag
      ? `released version v${pluginVersion} exists as a tag — bump catalog ref`
      : `no tag for v${pluginVersion} — unreleased bump, or a release that was never tagged`;
    findings.push({ level: 'WARN', msg: `catalog ref ${catalogRef} != plugin.json version ${pluginVersion} (${reason})` });
  }

  // 5. catalog stat line vs the plugin's own stat badges — per-axis, badge-gated.
  // An axis the plugin does not badge is SKIPPED (no claim to mirror). An axis the
  // badge carries but the catalog does not restate is likewise nothing: the catalog
  // chooses what to show. Only a stated number contradicting a badged one is a defect.
  if (statBadges !== null && catalogStats !== null) {
    for (const [axis, stated] of catalogStats) {
      if (!statBadges.has(axis)) continue;
      const badge = statBadges.get(axis);
      const approx = stated !== null && typeof stated === 'object';
      const bad = approx ? badge < stated.atLeast : badge !== stated;
      if (bad) {
        const shown = approx ? `${stated.atLeast}+` : String(stated);
        findings.push({
          level: 'ERROR',
          msg: `catalog says ${shown} ${axis} but the plugin's badge says ${badge} (catalog stat line is stale)`,
        });
      }
    }
  }

  const status = findings.some(f => f.level === 'ERROR') ? 'ERROR'
    : findings.some(f => f.level === 'WARN') ? 'WARN'
    : 'OK';
  if (findings.length === 0) findings.push({ level: 'OK', msg: `consistent at ${pluginVersion}` });
  return { name, status, findings };
}

// Read one file as it exists AT a git ref, without touching the working tree.
// null when the ref or the path does not resolve there.
function gitShow(repoDir, ref, path) {
  if (!ref) return null;
  try {
    return execFileSync('git', ['-C', repoDir, 'show', `${ref}:${path}`], { encoding: 'utf8', stdio: ['ignore', 'pipe', 'ignore'] });
  } catch {
    return null;
  }
}

function gitTags(repoDir) {
  try {
    const out = execFileSync('git', ['-C', repoDir, 'tag', '--list', 'v*'], { encoding: 'utf8' });
    return out.split('\n').map(s => s.trim()).filter(Boolean);
  } catch {
    return null;
  }
}

// I/O shell — resolve one plugin's observed state from disk, then classify.
export function inspectPlugin(catalogDir, plugin) {
  const name = plugin.name;
  const catalogRef = plugin.source?.ref ?? null;
  const repoDir = join(catalogDir, '..', name);

  if (!existsSync(repoDir)) {
    return classifyPlugin({ name, catalogRef, pluginVersion: null, readmeBadge: null, tags: null });
  }

  let pluginVersion = null;
  try {
    const pj = JSON.parse(readFileSync(join(repoDir, '.claude-plugin', 'plugin.json'), 'utf8'));
    pluginVersion = pj.version ?? null;
  } catch { /* leave null → flagged */ }

  let worktreeReadme = null;
  try {
    worktreeReadme = readFileSync(join(repoDir, 'README.md'), 'utf8');
  } catch { /* no README → badge + stat checks skipped */ }

  // Version-badge check 2 is about the working tree's INTERNAL consistency, so it keeps
  // reading the working tree. The stat mirror is about what the catalog promises users,
  // so it reads the pinned ref instead — see pickStatSource.
  const readmeBadge = worktreeReadme === null ? null : extractBadgeVersion(worktreeReadme);
  const statSource = pickStatSource({ atRef: gitShow(repoDir, catalogRef, 'README.md'), atWorktree: worktreeReadme });
  const statBadges = statSource === null ? null : extractStatBadges(statSource);

  let catalogLabel = null;
  let catalogStats = null;
  try {
    const catalogReadme = readFileSync(join(catalogDir, 'README.md'), 'utf8');
    catalogLabel = extractCatalogLabel(catalogReadme, name);
    catalogStats = extractCatalogStats(catalogReadme, name);
  } catch { /* no catalog README → label + stat checks skipped */ }

  return classifyPlugin({ name, catalogRef, pluginVersion, readmeBadge, tags: gitTags(repoDir), catalogLabel, statBadges, catalogStats });
}

export function runGate(catalogDir, { strict = false } = {}) {
  const mkt = JSON.parse(readFileSync(join(catalogDir, '.claude-plugin', 'marketplace.json'), 'utf8'));
  const results = (mkt.plugins || []).map(p => inspectPlugin(catalogDir, p));
  const hasError = results.some(r => r.status === 'ERROR');
  const hasWarn = results.some(r => r.status === 'WARN');
  return { results, hasError, hasWarn, failed: hasError || (strict && hasWarn) };
}

const __filename = fileURLToPath(import.meta.url);
if (process.argv[1] && pathToFileURL(process.argv[1]).href === import.meta.url) {
  const strict = process.argv.includes('--strict');
  const catalogDir = join(dirname(__filename), '..');
  const { results, failed } = runGate(catalogDir, { strict });

  const icon = { OK: '✓', WARN: '⚠', ERROR: '✗', SKIP: '–' };
  for (const r of results) {
    console.log(`${icon[r.status] || '?'} ${r.status.padEnd(5)} ${r.name}`);
    for (const f of r.findings) if (f.level !== 'OK') console.log(`        ${f.msg}`);
  }
  const count = (s) => results.filter(r => r.status === s).length;
  console.log('');
  console.log(`${results.length} plugins — ${count('OK')} OK, ${count('WARN')} WARN, ${count('ERROR')} ERROR, ${count('SKIP')} SKIP${strict ? ' (strict)' : ''}`);
  process.exit(failed ? 1 : 0);
}