#!/usr/bin/env node
// N13: гонка первого расчёта зарплаты. N параллельных POST /payroll/calculate для одной и той же
// пары (точка, месяц), когда расчёта ещё нет. Каждая попытка — новая точка (значит «первый» расчёт).
//
// Режимы:
//   --mode as-is      код и схема как есть (N2 не обходится);
//   --mode n2-bypass  ДИАГНОСТИКА: в одноразовой БД мигратор ставит DEFAULT now() для
//                     staff_outbox.occurred_at, чтобы обойти N2 и увидеть саму гонку.
//                     Продукт/миграции не меняются, БД удаляется при следующем provision.
// Опции: --sizes 10,25,50  --attempts 5  --with-sessions (подтверждённые смены, нужен n2-bypass)
// Требует E2E_PG_ADMIN_URL (bootstrap-админ только для создания ролей/БД).
// Правильное поведение: все ответы 200, один и тот же run_id, ровно один расчёт в БД,
// каждый возвращённый run_id существует в БД.
import { spawn, spawnSync } from 'node:child_process';
import { randomBytes } from 'node:crypto';
import { createWriteStream, mkdtempSync, readFileSync, rmSync } from 'node:fs';
import { createServer } from 'node:net';
import { tmpdir } from 'node:os';
import path from 'node:path';
import pg from 'pg';

const repoRoot = path.resolve(import.meta.dirname, '../..');
const args = process.argv.slice(2);
const opt = (name, fallback) => {
  const index = args.indexOf(`--${name}`);
  return index >= 0 ? args[index + 1] : fallback;
};
const mode = opt('mode', 'as-is');
const sizes = opt('sizes', '10,25,50').split(',').map(Number);
const attempts = Number(opt('attempts', '5'));
const withSessions = args.includes('--with-sessions');
const database = opt('db', `krona_staff_n13_${mode.replace(/-/g, '_')}`);

const CROCKFORD = '0123456789ABCDEFGHJKMNPQRSTVWXYZ';
const ulid = () =>
  Array.from(randomBytes(26), (byte) => CROCKFORD[byte % 32])
    .join('')
    .replace(/^./, '0');

function parseEnvFile(file) {
  const result = {};
  for (const line of readFileSync(file, 'utf8').split('\n')) {
    const index = line.indexOf('=');
    if (index > 0) result[line.slice(0, index)] = line.slice(index + 1);
  }
  return result;
}

function runNode(scriptArgs, env) {
  const result = spawnSync(process.execPath, scriptArgs, { cwd: repoRoot, env, encoding: 'utf8' });
  if (result.status !== 0) {
    process.stdout.write(`${result.stdout}${result.stderr}`);
    throw new Error(`${scriptArgs.join(' ')} failed`);
  }
  return result.stdout;
}

async function freePort() {
  return new Promise((resolve) => {
    const server = createServer();
    server.listen(0, '127.0.0.1', () => {
      const { port } = server.address();
      server.close(() => resolve(port));
    });
  });
}

const adminUrl = process.env.E2E_PG_ADMIN_URL;
if (!adminUrl) throw new Error('E2E_PG_ADMIN_URL не задан');
const secretsDir = mkdtempSync(path.join(tmpdir(), 'krona-n13-'));
runNode(
  ['scripts/test/provision-pg.mjs', '--out', path.join(secretsDir, 'db.env'), '--db', database],
  {
    ...process.env,
  },
);
const dbEnv = parseEnvFile(path.join(secretsDir, 'db.env'));
rmSync(secretsDir, { recursive: true, force: true });
runNode(['scripts/test/migrate-roundtrip.mjs', 'up'], {
  PATH: process.env.PATH ?? '',
  DATABASE_MIGRATION_URL: dbEnv.DATABASE_MIGRATION_URL,
});
const migrator = new pg.Client({ connectionString: dbEnv.DATABASE_MIGRATION_URL });
await migrator.connect();
if (mode === 'n2-bypass') {
  await migrator.query('ALTER TABLE staff_outbox ALTER COLUMN occurred_at SET DEFAULT now()');
  console.log(
    '[n13] ДИАГНОСТИКА: staff_outbox.occurred_at DEFAULT now() (обход N2 только в этой БД)',
  );
}

const tenantId = ulid();
const managerToken = randomBytes(32).toString('hex');
const terminalToken = randomBytes(32).toString('hex');
const vapid = {};
for (const line of runNode(['scripts/generate-vapid-keys.mjs'], process.env).split('\n')) {
  const index = line.indexOf('=');
  if (index > 0) vapid[line.slice(0, index)] = line.slice(index + 1);
}
const port = await freePort();
const log = createWriteStream(path.join(repoRoot, `tests/e2e/evidence/server-n13-${mode}.txt`));
const child = spawn(path.join(repoRoot, 'node_modules/.bin/tsx'), ['src/server.ts'], {
  cwd: repoRoot,
  env: {
    PATH: process.env.PATH ?? '',
    NODE_ENV: 'test',
    HOST: '127.0.0.1',
    PORT: String(port),
    LOG_LEVEL: 'warn',
    STAFF_RUNTIME_MODE: 'standalone',
    DATABASE_URL: dbEnv.DATABASE_URL,
    STANDALONE_TENANT_ID: tenantId,
    STANDALONE_ACTOR_ID: ulid(),
    STANDALONE_ACCESS: 'employee',
    STANDALONE_MANAGER_TOKEN: managerToken,
    STANDALONE_TERMINAL_TOKEN: terminalToken,
    STANDALONE_TERMINAL_ACTOR_ID: ulid(),
    ...vapid,
  },
  stdio: ['ignore', 'pipe', 'pipe'],
});
child.stdout.pipe(log);
child.stderr.pipe(log);
const base = `http://127.0.0.1:${port}/api/v1/staff`;

async function api(method, route, token, body) {
  const response = await fetch(`${base}${route}`, {
    method,
    headers: {
      authorization: `Bearer ${token}`,
      ...(body ? { 'content-type': 'application/json' } : {}),
    },
    ...(body ? { body: JSON.stringify(body) } : {}),
  });
  const text = await response.text();
  let json = null;
  try {
    json = JSON.parse(text);
  } catch {
    // не JSON
  }
  return { status: response.status, json, text };
}

try {
  for (let i = 0; i < 240; i += 1) {
    try {
      if ((await fetch(`${base}/ready`)).status === 200) break;
    } catch {
      // ещё не слушает
    }
    await new Promise((resolve) => setTimeout(resolve, 250));
  }
  await migrator.query("SELECT set_config('app.tenant_id', $1, false)", [tenantId]);

  const month = (() => {
    const date = new Date();
    date.setUTCDate(1);
    date.setUTCMonth(date.getUTCMonth() - 1);
    return date.toISOString().slice(0, 7);
  })();
  let hourlyRule = null;
  if (withSessions) {
    const rules = await api('GET', '/pay-rules', managerToken);
    hourlyRule = (
      rules.json.pay_rules.find((rule) => rule.code === 'hourly') ?? rules.json.pay_rules[0]
    ).id;
  }

  async function prepareUnit() {
    const code = `n13-${ulid().slice(-10).toLowerCase()}`;
    const suffix = ulid().slice(-8);
    const imported = await api('POST', '/imports/owner-workbook', managerToken, {
      source_name: `n13-import-${suffix}`,
      units: [{ code, name: `Синтетическая точка ${suffix}` }],
      ...(withSessions
        ? {
            employees: [
              {
                external_ref: `n13:${suffix}`,
                personnel_number: `N13-${suffix}`,
                display_name: `Синтетический ${suffix}`,
              },
            ],
          }
        : {}),
    });
    if (imported.status >= 300) throw new Error(`import ${imported.status} ${imported.text}`);
    const unitId = (await migrator.query('SELECT id FROM staff_org_units WHERE code = $1', [code]))
      .rows[0].id;
    if (withSessions) {
      const employeeId = (
        await migrator.query('SELECT id FROM staff_employees WHERE external_ref = $1', [
          `n13:${suffix}`,
        ])
      ).rows[0].id;
      const assign = await api('PUT', `/employees/${employeeId}/pay-assignment`, managerToken, {
        pay_rule_id: hourlyRule,
        org_unit_id: unitId,
        rate_minor: 12345,
        effective_from: '2026-01-01',
      });
      if (assign.status !== 200) throw new Error(`assign ${assign.status} ${assign.text}`);
      const start = new Date(`${month}-10T09:00:00Z`);
      for (const [eventType, at] of [
        ['check_in', start],
        ['check_out', new Date(start.getTime() + 8 * 3_600_000)],
      ]) {
        const event = await api('POST', '/attendance/events', terminalToken, {
          employee_id: employeeId,
          event_type: eventType,
          occurred_at: at.toISOString(),
          source_event_id: `n13-${ulid()}`,
          org_unit_id: unitId,
        });
        if (event.status !== 201) throw new Error(`clock ${event.status} ${event.text}`);
      }
      const day = start.toISOString().slice(0, 10);
      const reconcile = await api('POST', '/work-sessions/reconcile', managerToken, {
        date_from: day,
        date_to: day,
      });
      if (reconcile.status !== 200) throw new Error(`reconcile ${reconcile.status}`);
      const sessionId = (
        await migrator.query('SELECT id FROM staff_work_sessions WHERE employee_id = $1', [
          employeeId,
        ])
      ).rows[0].id;
      const confirm = await api('PATCH', `/work-sessions/${sessionId}`, managerToken, {
        status: 'confirmed',
      });
      if (confirm.status !== 200)
        throw new Error(`confirm ${confirm.status} ${confirm.text.slice(0, 200)}`);
    }
    return unitId;
  }

  let totalBad = 0;
  const summary = [];
  for (const size of sizes) {
    for (let attempt = 1; attempt <= attempts; attempt += 1) {
      const unitId = await prepareUnit();
      const responses = await Promise.all(
        Array.from({ length: size }, () =>
          api('POST', '/payroll/calculate', managerToken, { month, org_unit_id: unitId }),
        ),
      );
      const statuses = {};
      const errors = {};
      const runIds = new Set();
      for (const response of responses) {
        statuses[response.status] = (statuses[response.status] ?? 0) + 1;
        if (response.status === 200) {
          const id = response.json?.run_id ?? response.json?.id ?? response.json?.run?.id;
          if (id) runIds.add(id);
        } else {
          const key = (
            response.json?.error?.message ??
            response.json?.message ??
            response.text
          ).slice(0, 90);
          errors[key] = (errors[key] ?? 0) + 1;
        }
      }
      const dbRuns = (
        await migrator.query('SELECT id FROM staff_payroll_runs WHERE org_unit_id = $1', [unitId])
      ).rows.map((row) => row.id);
      const dbLines = Number(
        (
          await migrator.query(
            'SELECT count(*) AS n FROM staff_payroll_lines WHERE org_unit_id = $1',
            [unitId],
          )
        ).rows[0].n,
      );
      const phantom = [...runIds].filter((id) => !dbRuns.includes(id));
      const ok =
        (statuses[200] ?? 0) === size &&
        runIds.size === 1 &&
        dbRuns.length === 1 &&
        phantom.length === 0;
      if (!ok) totalBad += 1;
      const line =
        `[n13] mode=${mode} sessions=${withSessions} N=${size} attempt=${attempt}: ` +
        `statuses=${JSON.stringify(statuses)} distinct_run_ids=${runIds.size} db_runs=${dbRuns.length} db_lines=${dbLines} ` +
        `phantom_run_ids=${phantom.length} errors=${JSON.stringify(errors)} -> ${ok ? 'OK' : 'BAD'}`;
      console.log(line);
      summary.push(ok);
    }
  }
  console.log(
    `[n13] ИТОГ mode=${mode} sessions=${withSessions}: попыток ${summary.length}, некорректных ${totalBad}`,
  );
  process.exitCode = totalBad > 0 ? 1 : 0;
} finally {
  await migrator.end();
  child.kill('SIGTERM');
}