#!/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;
}

// 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 }) {
  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})` });
  }

  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 };
}

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 readmeBadge = null;
  try {
    readmeBadge = extractBadgeVersion(readFileSync(join(repoDir, 'README.md'), 'utf8'));
  } catch { /* no README → badge check skipped */ }

  let catalogLabel = null;
  try {
    catalogLabel = extractCatalogLabel(readFileSync(join(catalogDir, 'README.md'), 'utf8'), name);
  } catch { /* no catalog README → label check skipped */ }

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

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);
}