/**
 * `gbrain agent` CLI tests. Covers arg parsing, --since parser, and the
 * submit path end-to-end against PGLite so we verify trusted submission,
 * protected-name guard, and fan-out wiring.
 *
 * The full handler-run loop is NOT exercised here (tested in subagent-
 * handler.test.ts). This file checks the CLI's submission + orchestration
 * glue.
 */

import { describe, test, expect, beforeAll, afterAll, beforeEach } from 'bun:test';
import * as fs from 'node:fs';
import * as path from 'node:path';
import * as os from 'node:os';
import { PGLiteEngine } from '../src/core/pglite-engine.ts';
import { MinionQueue } from '../src/core/minions/queue.ts';
import { __testing as agentTesting } from '../src/commands/agent.ts';
import { parseSince } from '../src/commands/agent-logs.ts';
import { isProtectedJobName, PROTECTED_JOB_NAMES } from '../src/core/minions/protected-names.ts';

let engine: PGLiteEngine;
let queue: MinionQueue;

beforeAll(async () => {
  engine = new PGLiteEngine();
  await engine.connect({ database_url: '' });
  await engine.initSchema();
  queue = new MinionQueue(engine);
});

afterAll(async () => {
  await engine.disconnect();
});

beforeEach(async () => {
  await engine.executeRaw('DELETE FROM minion_jobs');
});

describe('parseRunFlags', () => {
  test('follow defaults off when stdout is non-TTY (test env)', () => {
    const { flags, rest } = agentTesting.parseRunFlags(['hello', 'world']);
    expect(flags.follow).toBe(process.stdout.isTTY === true);
    expect(rest).toEqual(['hello', 'world']);
  });

  test('flags before prompt are parsed, unknown token ends flag parsing', () => {
    const { flags, rest } = agentTesting.parseRunFlags([
      '--model', 'claude-opus-4-7', '--max-turns', '30', 'summarize', 'everything',
    ]);
    expect(flags.model).toBe('claude-opus-4-7');
    expect(flags.maxTurns).toBe(30);
    expect(rest).toEqual(['summarize', 'everything']);
  });

  test('--tools comma-split', () => {
    const { flags } = agentTesting.parseRunFlags(['--tools', 'brain_search, brain_get_page', 'prompt']);
    expect(flags.tools).toEqual(['brain_search', 'brain_get_page']);
  });

  test('--detach implies !follow', () => {
    const { flags } = agentTesting.parseRunFlags(['--detach', 'x']);
    expect(flags.detach).toBe(true);
    expect(flags.follow).toBe(false);
  });

  test('double-dash ends flag parsing explicitly', () => {
    const { flags, rest } = agentTesting.parseRunFlags(['--model', 'm', '--', '--not-a-flag']);
    expect(flags.model).toBe('m');
    expect(rest).toEqual(['--not-a-flag']);
  });

  test('unknown flag throws', () => {
    expect(() => agentTesting.parseRunFlags(['--what', 'x'])).toThrow(/unknown flag/);
  });

  test('--subagent-def + --timeout-ms parsed', () => {
    const { flags } = agentTesting.parseRunFlags([
      '--subagent-def', 'researcher', '--timeout-ms', '60000', 'hello',
    ]);
    expect(flags.subagentDef).toBe('researcher');
    expect(flags.timeoutMs).toBe(60000);
  });

  test('--fanout-manifest parsed', () => {
    const { flags } = agentTesting.parseRunFlags(['--fanout-manifest', '/tmp/m.json']);
    expect(flags.fanoutManifest).toBe('/tmp/m.json');
  });
});

describe('parseSince', () => {
  test('returns undefined on empty input', () => {
    expect(parseSince(undefined)).toBeUndefined();
    expect(parseSince('')).toBeUndefined();
  });

  test('parses ISO-8601 timestamps', () => {
    const iso = '2026-04-20T12:00:00.000Z';
    expect(parseSince(iso)).toBe(iso);
  });

  test('parses relative 5m', () => {
    const out = parseSince('5m')!;
    const parsed = new Date(out).getTime();
    const now = Date.now();
    expect(now - parsed).toBeGreaterThanOrEqual(5 * 60 * 1000 - 1000);
    expect(now - parsed).toBeLessThan(5 * 60 * 1000 + 1000);
  });

  test('parses relative 2h', () => {
    const out = parseSince('2h')!;
    const delta = Date.now() - new Date(out).getTime();
    expect(delta).toBeGreaterThanOrEqual(2 * 3600 * 1000 - 1000);
  });

  test('parses relative 1d', () => {
    const out = parseSince('1d')!;
    const delta = Date.now() - new Date(out).getTime();
    expect(delta).toBeGreaterThanOrEqual(86_400_000 - 1000);
  });

  test('throws on unparseable input', () => {
    expect(() => parseSince('not-a-date')).toThrow(/could not parse/);
  });
});

describe('protected-name guard includes subagent + aggregator', () => {
  test('shell stays protected', () => {
    expect(isProtectedJobName('shell')).toBe(true);
    expect(PROTECTED_JOB_NAMES.has('shell')).toBe(true);
  });

  test('subagent is protected (v0.15)', () => {
    expect(isProtectedJobName('subagent')).toBe(true);
  });

  test('subagent_aggregator is protected (v0.15)', () => {
    expect(isProtectedJobName('subagent_aggregator')).toBe(true);
  });

  test('a random non-protected name is not protected', () => {
    expect(isProtectedJobName('sync')).toBe(false);
  });

  test('trim normalization still blocks " subagent "', () => {
    expect(isProtectedJobName('  subagent  ')).toBe(true);
  });
});

describe('queue.add trusted-submit gate for subagent', () => {
  test('subagent without allowProtectedSubmit throws', async () => {
    await expect(queue.add('subagent', { prompt: 'hi' })).rejects.toThrow();
  });

  test('subagent with allowProtectedSubmit succeeds', async () => {
    const job = await queue.add('subagent', { prompt: 'hi' }, {}, { allowProtectedSubmit: true });
    expect(job.name).toBe('subagent');
    expect(job.status).toBe('waiting');
  });

  test('subagent_aggregator gated the same way', async () => {
    await expect(queue.add('subagent_aggregator', { children_ids: [] })).rejects.toThrow();
    const ok = await queue.add('subagent_aggregator', { children_ids: [1] }, {}, {
      allowProtectedSubmit: true,
    });
    expect(ok.name).toBe('subagent_aggregator');
  });
});

describe('fan-out manifest shape (integration)', () => {
  test('fanout-manifest with 3 entries creates 3 subagent children + 1 aggregator', async () => {
    // Manually replicate what runAgentRun does for --fanout-manifest > 1.
    // We don't invoke runAgentRun (it calls process.exit on error) — we
    // assert that the plumbing works via direct queue calls with the
    // same flags it uses.
    const tmp = fs.mkdtempSync(path.join(os.tmpdir(), 'fanout-'));
    try {
      const manifestPath = path.join(tmp, 'm.json');
      fs.writeFileSync(manifestPath, JSON.stringify([
        { prompt: 'chunk 1' }, { prompt: 'chunk 2' }, { prompt: 'chunk 3' },
      ]));

      // Aggregator first.
      const agg = await queue.add(
        'subagent_aggregator',
        { children_ids: [] },
        { max_stalled: 3 },
        { allowProtectedSubmit: true },
      );
      const kids: number[] = [];
      for (const p of ['chunk 1', 'chunk 2', 'chunk 3']) {
        const c = await queue.add(
          'subagent',
          { prompt: p },
          { parent_job_id: agg.id, on_child_fail: 'continue', max_stalled: 3 },
          { allowProtectedSubmit: true },
        );
        kids.push(c.id);
      }
      await engine.executeRaw(
        `UPDATE minion_jobs SET data = jsonb_set(data, '{children_ids}', $1::jsonb) WHERE id = $2`,
        [JSON.stringify(kids), agg.id],
      );

      // Aggregator should be in waiting-children since kids were submitted
      // with parent_job_id = agg.id (Lane 1B behavior).
      const aggNow = await queue.getJob(agg.id);
      expect(aggNow?.status).toBe('waiting-children');

      // Aggregator's data.children_ids reflects the spawned children.
      const dataRow = await engine.executeRaw<{ data: unknown }>(
        `SELECT data FROM minion_jobs WHERE id = $1`, [agg.id],
      );
      const data = typeof dataRow[0]!.data === 'string'
        ? JSON.parse(dataRow[0]!.data as string)
        : dataRow[0]!.data as Record<string, unknown>;
      expect(data.children_ids).toEqual(kids);

      // Each child should have on_child_fail = 'continue'.
      const childRows = await engine.executeRaw<{ on_child_fail: string }>(
        `SELECT on_child_fail FROM minion_jobs WHERE parent_job_id = $1`, [agg.id],
      );
      expect(childRows.length).toBe(3);
      expect(childRows.every(r => r.on_child_fail === 'continue')).toBe(true);
    } finally {
      fs.rmSync(tmp, { recursive: true, force: true });
    }
  });
});