import { describe, it, expect, vi, beforeEach } from 'vitest'

const { mockSend, mockFrom } = vi.hoisted(() => ({
  mockSend: vi.fn(),
  mockFrom: vi.fn(),
}))

vi.mock('resend', () => {
  function MockResend() {}
  MockResend.prototype.emails = { send: mockSend }
  return { Resend: MockResend }
})

vi.mock('@/lib/supabase/server', () => ({
  createClient: vi.fn().mockResolvedValue({ from: mockFrom }),
}))

import { sendNewIncidentEmail } from '@/lib/notifications/email'

const mockIncidentRow = {
  reported_at: '2026-07-10T09:00:00Z',
  sites: { name: 'SCW1' },
  reporter: { name: 'John Doe' },
}

function setupMocks(recipientData: object[]) {
  mockFrom.mockImplementation((table: string) => {
    if (table === 'users') {
      return {
        select: vi.fn().mockReturnThis(),
        in: vi.fn().mockReturnThis(),
        eq: vi.fn().mockResolvedValue({ data: recipientData, error: null }),
      }
    }
    return {
      select: vi.fn().mockReturnThis(),
      eq: vi.fn().mockReturnThis(),
      single: vi.fn().mockResolvedValue({ data: mockIncidentRow, error: null }),
    }
  })
}

beforeEach(() => {
  vi.clearAllMocks()
  mockSend.mockResolvedValue({ data: { id: 'email-123' }, error: null })
  setupMocks([
    { email: 'supervisor@setiacorp.com', name: 'Ahmad', role: 'supervisor' },
    { email: 'hse@setiacorp.com', name: 'Priya', role: 'hse' },
  ])
})

describe('sendNewIncidentEmail', () => {
  it('sends email to supervisor and hse users', async () => {
    await sendNewIncidentEmail('inc-001', 'site-001', 'SCW1-202607-0001', 'near_miss')
    expect(mockSend).toHaveBeenCalledTimes(1)
    const call = mockSend.mock.calls[0][0]
    expect(call.to).toEqual(expect.arrayContaining(['supervisor@setiacorp.com', 'hse@setiacorp.com']))
    expect(call.subject).toContain('SCW1-202607-0001')
  })

  it('does not send if no recipients', async () => {
    setupMocks([])
    await sendNewIncidentEmail('inc-001', 'site-001', 'SCW1-202607-0001', 'near_miss')
    expect(mockSend).not.toHaveBeenCalled()
  })
})