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

const mockGetTariffs = vi.fn()
const mockPayloadFind = vi.fn()
const mockPayloadUpdate = vi.fn()
const mockPayloadCreate = vi.fn()
const mockGetPayload = vi.fn(() => ({
  find: mockPayloadFind,
  update: mockPayloadUpdate,
  create: mockPayloadCreate,
}))

vi.mock('@/lib/ezy', () => ({ getTariffs: mockGetTariffs }))
vi.mock('payload', () => ({ getPayload: mockGetPayload }))
vi.mock('@payload-config', () => ({ default: {} }))

let syncTariffs: () => Promise<{ synced: number; created: number; hidden: number }>

beforeEach(async () => {
  vi.resetModules()
  mockGetTariffs.mockReset()
  mockPayloadFind.mockReset()
  mockPayloadUpdate.mockReset()
  mockPayloadCreate.mockReset()
  const mod = await import('@/lib/syncTariffs')
  syncTariffs = mod.syncTariffs
})

describe('syncTariffs', () => {
  it('updates existing tariffs and returns correct synced count', async () => {
    mockGetTariffs.mockResolvedValueOnce([
      { id: 1, name: 'Adult', price: 250 },
      { id: 2, name: 'Child', price: 150 },
    ])
    // per-tariff find calls + final visible-tariffs scan
    mockPayloadFind
      .mockResolvedValueOnce({ docs: [{ id: 'tariff-1', ezy_id: 1 }] })
      .mockResolvedValueOnce({ docs: [{ id: 'tariff-2', ezy_id: 2 }] })
      .mockResolvedValueOnce({ docs: [] })
    mockPayloadUpdate.mockResolvedValue({})

    const result = await syncTariffs()
    expect(result.synced).toBe(2)
    expect(result.created).toBe(0)
    expect(result.hidden).toBe(0)
    expect(mockPayloadUpdate).toHaveBeenCalledTimes(2)
  })

  it('creates new tariffs when ezy_id does not exist in DB', async () => {
    mockGetTariffs.mockResolvedValueOnce([
      { id: 1, name: 'Adult', price: 250 },
      { id: 2, name: 'Child', price: 150 },
    ])
    mockPayloadFind
      .mockResolvedValueOnce({ docs: [] })
      .mockResolvedValueOnce({ docs: [] })
      .mockResolvedValueOnce({ docs: [] })
    mockPayloadCreate.mockResolvedValue({})

    const result = await syncTariffs()
    expect(result.created).toBe(2)
    expect(result.synced).toBe(0)
    expect(mockPayloadCreate).toHaveBeenCalledTimes(2)
  })

  it('hides DB tariffs that are no longer present in ezy', async () => {
    mockGetTariffs.mockResolvedValueOnce([{ id: 1, name: 'Adult', price: 250 }])
    mockPayloadFind
      .mockResolvedValueOnce({ docs: [{ id: 'tariff-1', ezy_id: 1 }] })
      // visible scan: id:99 is not in ezy anymore
      .mockResolvedValueOnce({ docs: [{ id: 'tariff-stale', ezy_id: 99 }] })
    mockPayloadUpdate.mockResolvedValue({})

    const result = await syncTariffs()
    expect(result.hidden).toBe(1)
    expect(mockPayloadUpdate).toHaveBeenCalledWith(
      expect.objectContaining({
        id: 'tariff-stale',
        data: { visible: false },
      })
    )
  })

  it('returns zero counts when ezy returns an empty array', async () => {
    mockGetTariffs.mockResolvedValueOnce([])
    mockPayloadFind.mockResolvedValueOnce({ docs: [] })

    const result = await syncTariffs()
    expect(result).toEqual({ synced: 0, created: 0, hidden: 0 })
  })

  it('propagates error when getTariffs throws', async () => {
    mockGetTariffs.mockRejectedValueOnce(new Error('ezy unavailable'))
    await expect(syncTariffs()).rejects.toThrow('ezy unavailable')
  })

  it('writes last_synced_name and last_synced_price when updating an existing tariff', async () => {
    mockGetTariffs.mockResolvedValueOnce([{ id: 1, name: 'Updated Adult', price: 300 }])
    mockPayloadFind
      .mockResolvedValueOnce({ docs: [{ id: 'tariff-1', ezy_id: 1 }] })
      .mockResolvedValueOnce({ docs: [] })
    mockPayloadUpdate.mockResolvedValue({})

    await syncTariffs()
    expect(mockPayloadUpdate).toHaveBeenCalledWith(
      expect.objectContaining({
        collection: 'tariffs',
        id: 'tariff-1',
        data: expect.objectContaining({
          last_synced_name: 'Updated Adult',
          last_synced_price: 300,
        }),
      })
    )
  })

  it('creates new tariff with category_tag dyno and visible:true', async () => {
    mockGetTariffs.mockResolvedValueOnce([{ id: 5, name: 'VIP', price: 500 }])
    mockPayloadFind
      .mockResolvedValueOnce({ docs: [] })
      .mockResolvedValueOnce({ docs: [] })
    mockPayloadCreate.mockResolvedValue({})

    await syncTariffs()
    expect(mockPayloadCreate).toHaveBeenCalledWith(
      expect.objectContaining({
        collection: 'tariffs',
        data: expect.objectContaining({
          ezy_id: 5,
          category_tag: 'dyno',
          visible: true,
        }),
      })
    )
  })
})