import { beforeEach, describe, expect, it, vi } from 'vitest'
import { NextResponse } from 'next/server'
import { createMockRequest, createMockRouteParams, createQueuedMockSupabase } from '@/tests/helpers'

const { supabase: mockSupabase, enqueue, reset } = createQueuedMockSupabase()
const service = createQueuedMockSupabase()
const requireAuthMock = vi.fn()
const sendEmailMock = vi.fn()
const isConfiguredMock = vi.fn()

vi.mock('@/lib/init', () => ({ ensureInitialized: vi.fn() }))
vi.mock('@/lib/auth/require-auth', () => ({
  requireAuth: (...args: unknown[]) => requireAuthMock(...args),
}))
vi.mock('@/lib/company/context', () => ({
  getActiveCompanyId: vi.fn().mockResolvedValue('company-1'),
}))
vi.mock('@/lib/auth/require-write', () => ({
  requireWritePermission: vi.fn().mockResolvedValue({ ok: true }),
}))
vi.mock('@/lib/supabase/server', () => ({
  createServiceClient: () => service.supabase,
}))
vi.mock('@/lib/email/service', () => ({
  getEmailService: () => ({
    sendEmail: (...args: unknown[]) => sendEmailMock(...args),
    isConfigured: () => isConfiguredMock(),
  }),
}))
vi.mock('@/lib/support', () => ({
  getSupportRecipientEmail: () => 'support@example.test',
}))

import { POST } from '../route'

const user = { id: 'user-1', email: 'owner@example.test' }
const requestedRow = {
  company_id: 'company-1',
  status: 'requested',
  max_sends: null,
  receive_enabled: false,
  requested_at: '2026-08-21T15:00:00.000Z',
  requested_by: 'user-1',
  request_note: null,
  enabled_at: null,
  enabled_by: null,
  disabled_at: null,
  note: null,
  created_at: '2026-08-21T15:00:00.000Z',
  updated_at: '2026-08-21T15:00:00.000Z',
}

describe('POST /api/settings/peppol/access', () => {
  beforeEach(() => {
    vi.clearAllMocks()
    reset()
    service.reset()
    isConfiguredMock.mockReturnValue(true)
    sendEmailMock.mockResolvedValue({ success: true })
    requireAuthMock.mockResolvedValue({ user, supabase: mockSupabase, error: null })
  })

  function post(body: unknown = {}) {
    return POST(createMockRequest('/api/settings/peppol/access', { method: 'POST', body }), createMockRouteParams({}))
  }

  it('returns 401 when not authenticated', async () => {
    requireAuthMock.mockResolvedValue({
      user: null,
      supabase: mockSupabase,
      error: NextResponse.json({ error: 'Unauthorized' }, { status: 401 }),
    })
    expect((await post()).status).toBe(401)
  })

  it('rejects an oversized note', async () => {
    const response = await post({ note: 'x'.repeat(2001) })
    expect(response.status).toBe(400)
  })

  it('refuses the sandbox', async () => {
    enqueue({ data: { is_sandbox: true }, error: null })
    const response = await post()
    expect(response.status).toBe(403)
    expect((await response.json()).error.code).toBe('PEPPOL_SANDBOX_NOT_ALLOWED')
  })

  it('records the request, mails the operators and returns the locked summary', async () => {
    enqueue({ data: { is_sandbox: false }, error: null })                         // sandbox check
    service.enqueue({ data: null, error: null })                                  // no access row
    service.enqueue({ data: requestedRow, error: null })                          // upsert
    enqueue({ data: { company_name: 'Kund AB', org_number: '556677-8899' }, error: null }) // company settings
    service.enqueue({ data: requestedRow, error: null })                          // summary read

    const response = await post({ note: 'Vi fakturerar Region Skåne', wants_receiving: true })
    const body = await response.json()

    expect(response.status).toBe(201)
    expect(body.data.access).toMatchObject({ status: 'requested', send_enabled: false })
    expect(sendEmailMock).toHaveBeenCalledTimes(1)
    const mail = sendEmailMock.mock.calls[0][0] as { to: string; subject: string; text: string }
    expect(mail.to).toBe('support@example.test')
    expect(mail.subject).toContain('Kund AB')
    expect(mail.subject).toContain('mottagning')
    expect(mail.text).toContain('company-1')
    expect(mail.text).toContain('Region Skåne')
    expect(mail.text).toContain('--receive')
    const upsert = service.calls.find((c) => c.method === 'upsert')?.args[0] as Record<string, unknown>
    expect(upsert.request_note).toBe('[vill ta emot e-fakturor] Vi fakturerar Region Skåne')
  })

  it('is idempotent for a repeated request (no second e-mail) and 409 when already enabled', async () => {
    enqueue({ data: { is_sandbox: false }, error: null })
    service.enqueue({ data: requestedRow, error: null })
    service.enqueue({ data: requestedRow, error: null })
    const again = await post()
    expect(again.status).toBe(200)
    expect(sendEmailMock).not.toHaveBeenCalled()

    reset(); service.reset()
    enqueue({ data: { is_sandbox: false }, error: null })
    service.enqueue({ data: { ...requestedRow, status: 'enabled', enabled_at: '2026-08-21T16:00:00.000Z' }, error: null })
    const enabled = await post()
    expect(enabled.status).toBe(409)
    expect((await enabled.json()).error.code).toBe('PEPPOL_ACCESS_ALREADY_ENABLED')
  })
})