#!/usr/bin/env bun
import * as path from 'path';
import { loadLensRegistry, renderRegistryMarkdown, resolveLensName, writeGeneratedRegistry } from '../scripts/lenses/registry';

function arg(name: string): string | undefined {
  const i = process.argv.indexOf(name);
  return i >= 0 ? process.argv[i + 1] : undefined;
}

const repoRoot = path.resolve(arg('--repo-root') ?? process.cwd());
const command = process.argv[2] ?? 'list';
const specs = loadLensRegistry(repoRoot);

if (command === 'validate') {
  process.stdout.write(JSON.stringify({ valid: true, lenses: specs.map((s) => ({ lens: s.lens, status: s.status })) }, null, 2) + '\n');
} else if (command === 'generate') {
  process.stdout.write(writeGeneratedRegistry(repoRoot, specs) + '\n');
} else if (command === 'markdown') {
  process.stdout.write(renderRegistryMarkdown(specs));
} else if (command === 'describe') {
  const requested = process.argv[3];
  if (!requested) throw new Error('Usage: gstack-lens-registry describe <lens>');
  const spec = resolveLensName(specs, requested);
  if (!spec) throw new Error(`Unknown lens: ${requested}`);
  process.stdout.write(JSON.stringify({
    lens: spec.lens,
    aliases: spec.cli_aliases,
    status: spec.status,
    summary: spec.summary,
    scope_disclaimer: spec.scope_disclaimer,
    primary_skill: spec.primary_skill,
    required_artifacts: spec.required_artifacts,
    required_context: spec.required_context,
    invocation_triggers: spec.invocation_triggers,
    prompt: spec.body,
  }, null, 2) + '\n');
} else if (command === 'list') {
  process.stdout.write(JSON.stringify(specs.map((spec) => ({
    lens: spec.lens,
    aliases: spec.cli_aliases,
    status: spec.status,
    summary: spec.summary,
    primary_skill: spec.primary_skill,
  })), null, 2) + '\n');
} else {
  throw new Error(`Unknown command '${command}'. Use list, describe, validate, generate, or markdown.`);
}