import type { Command } from 'commander';

/**
 * Register macp subcommands on an existing Commander program.
 * This avoids cross-package Commander version mismatches by using the
 * caller's Command instance directly.
 */
export function registerMacpCommand(parent: Command): void {
  const macp = parent.command('macp').description('MACP task and gate management');

  // ─── tasks ───────────────────────────────────────────────────────────────

  const tasks = macp.command('tasks').description('Manage MACP tasks');

  tasks
    .command('list')
    .description('List MACP tasks')
    .option(
      '--status <status>',
      'Filter by task status (pending|running|gated|completed|failed|escalated)',
    )
    .option(
      '--type <type>',
      'Filter by task type (coding|deploy|research|review|documentation|infrastructure)',
    )
    .action((opts: { status?: string; type?: string }) => {
      // not yet wired — task persistence layer is not present in @mosaicstack/macp
      console.log('[macp] tasks list: not yet wired — use macp package programmatically');
      if (opts.status) {
        console.log(`  status filter: ${opts.status}`);
      }
      if (opts.type) {
        console.log(`  type filter: ${opts.type}`);
      }
      process.exitCode = 0;
    });

  // ─── submit ──────────────────────────────────────────────────────────────

  macp
    .command('submit <path>')
    .description('Submit a task from a JSON/YAML spec file')
    .action((specPath: string) => {
      // not yet wired — task submission requires a running MACP server
      console.log('[macp] submit: not yet wired — use macp package programmatically');
      console.log(`  spec path: ${specPath}`);
      console.log('  task id:   (unavailable — no MACP server connected)');
      console.log('  status:    (unavailable — no MACP server connected)');
      process.exitCode = 0;
    });

  // ─── gate ────────────────────────────────────────────────────────────────

  macp
    .command('gate <spec>')
    .description('Run a gate from a spec string or file path (wraps runGate/runGates)')
    .option('--fail-on <mode>', 'Gate fail-on mode: ai|fail|both|none', 'fail')
    .option('--cwd <path>', 'Working directory for gate execution', process.cwd())
    .option('--log <path>', 'Path to write gate log output', '/tmp/macp-gate.log')
    .option('--timeout <seconds>', 'Gate timeout in seconds', '60')
    .action((spec: string, opts: { failOn: string; cwd: string; log: string; timeout: string }) => {
      // not yet wired — gate execution requires a task context and event sink
      console.log('[macp] gate: not yet wired — use macp package programmatically');
      console.log(`  spec:     ${spec}`);
      console.log(`  fail-on:  ${opts.failOn}`);
      console.log(`  cwd:      ${opts.cwd}`);
      console.log(`  log:      ${opts.log}`);
      console.log(`  timeout:  ${opts.timeout}s`);
      process.exitCode = 0;
    });

  // ─── events ──────────────────────────────────────────────────────────────

  const events = macp.command('events').description('Stream MACP events');

  events
    .command('tail')
    .description('Tail MACP events from the event log (wraps event emitter)')
    .option('--file <path>', 'Path to the MACP events NDJSON file')
    .option('--follow', 'Follow the file for new events (like tail -f)')
    .action((opts: { file?: string; follow?: boolean }) => {
      // not yet wired — event streaming requires a live event source
      console.log('[macp] events tail: not yet wired — use macp package programmatically');
      if (opts.file) {
        console.log(`  file:   ${opts.file}`);
      }
      if (opts.follow) {
        console.log('  mode:   follow');
      }
      process.exitCode = 0;
    });
}