import { mkdtempSync, rmSync } from 'node:fs'
import { tmpdir } from 'node:os'
import { join } from 'node:path'
import { afterEach, describe, expect, it, vi } from 'vitest'
import { listBackups } from '@authportal/db'
import { loadConfig } from '../src/config.js'
import { backupDirFor, runBackup, startBackupJob } from '../src/services/backup.js'
import { buildApp } from '../src/app.js'
import { adminToken } from './helpers.js'

const dirs: string[] = []
afterEach(() => {
  vi.useRealTimers()
  for (const d of dirs.splice(0)) {
    try {
      rmSync(d, { recursive: true, force: true })
    } catch {
      /* Windows может держать файл БД до GC — временный каталог не критичен */
    }
  }
})

function env(dir: string, extra: NodeJS.ProcessEnv = {}) {
  return loadConfig({
    JWT_SECRET: 'test-secret-at-least-8',
    ADMIN_EMAIL: 'admin@test.local',
    ADMIN_PASSWORD: 'adminpass',
    DATABASE_URL: `sqlite:${join(dir, 'app.db')}`,
    NODE_ENV: 'test',
    ...extra,
  })
}

describe('backup', () => {
  it('backupDirFor: по умолчанию рядом с БД, BACKUP_DIR приоритетнее', () => {
    const cfg = env('/data/x')
    expect(backupDirFor(cfg).replaceAll(String.fromCharCode(92), '/')).toMatch(/\/data\/x\/backups$/)
    const custom = env('/data/x', { BACKUP_DIR: '/mnt/bk' })
    expect(backupDirFor(custom).replaceAll(String.fromCharCode(92), '/')).toMatch(/\/mnt\/bk$/)
  })

  it('бэкап живого приложения восстанавливается: вход админа работает', async () => {
    const dir = mkdtempSync(join(tmpdir(), 'ap-api-bk-'))
    dirs.push(dir)
    const config = env(dir, { BACKUP_KEEP: '2' })
    const app = await buildApp({ config })
    const res = await runBackup(app.sqlite, config)
    expect(listBackups(backupDirFor(config))).toHaveLength(1)
    await app.close()

    const restored = await buildApp({
      config: env(dir),
      databaseUrl: `sqlite:${res.file}`,
    })
    const token = await adminToken(restored as never)
    expect(token).toBeTruthy()
    await restored.close()
  })

  it('startBackupJob выключен при 0 часов и работает по таймеру', async () => {
    vi.useFakeTimers()
    const dir = mkdtempSync(join(tmpdir(), 'ap-job-bk-'))
    dirs.push(dir)
    const config = env(dir, { BACKUP_INTERVAL_HOURS: '1' })
    const app = await buildApp({ config })

    const base = vi.getTimerCount()
    const off = startBackupJob({ ...app, config: { ...config, backupIntervalHours: 0 } } as never)
    expect(vi.getTimerCount()).toBe(base)
    off()

    const stop = startBackupJob(app)
    expect(vi.getTimerCount()).toBe(base + 1)
    await vi.advanceTimersByTimeAsync(60 * 60 * 1000 + 10)
    vi.useRealTimers()
    await vi.waitFor(() =>
      expect(listBackups(backupDirFor(config)).length).toBeGreaterThan(0),
    )
    stop()
    await app.close()
  })
})