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

import Member from '../../../server/models/member.js'
import { requireAuth } from '../../../server/utils/auth.js'
import { requiresPayment, getHelcimPlanId } from '../../../server/config/contributions.js'
import { createHelcimSubscription, listHelcimCustomerTransactions } from '../../../server/utils/helcim.js'
import { upsertPaymentFromHelcim } from '../../../server/utils/payments.js'
import { sendWelcomeEmail } from '../../../server/utils/resend.js'
import subscriptionHandler from '../../../server/api/helcim/subscription.post.js'
import { createMockEvent } from '../helpers/createMockEvent.js'

vi.mock('../../../server/models/member.js', () => ({
  default: { findOneAndUpdate: vi.fn(), findOne: vi.fn(), findById: vi.fn() }
}))
vi.mock('../../../server/utils/mongoose.js', () => ({ connectDB: vi.fn() }))
vi.mock('../../../server/utils/auth.js', () => ({
  requireAuth: vi.fn(),
  getPaymentBridgeMember: vi.fn().mockResolvedValue(null)
}))
vi.mock('../../../server/utils/slack.ts', () => ({
  getSlackService: vi.fn().mockReturnValue(null)
}))
vi.mock('../../../server/config/contributions.js', () => ({
  requiresPayment: vi.fn(),
  getHelcimPlanId: vi.fn(),
}))
vi.mock('../../../server/utils/resend.js', () => ({
  sendWelcomeEmail: vi.fn().mockResolvedValue({ success: true })
}))
vi.mock('../../../server/utils/helcim.js', () => ({
  createHelcimSubscription: vi.fn(),
  generateIdempotencyKey: vi.fn().mockReturnValue('idem-key-123'),
  listHelcimCustomerTransactions: vi.fn().mockResolvedValue([]),
}))
vi.mock('../../../server/utils/payments.js', () => ({
  upsertPaymentFromHelcim: vi.fn().mockResolvedValue({ created: true, payment: { _id: 'p1' } })
}))

// helcimSubscriptionSchema is a Nitro auto-import used by validateBody
vi.stubGlobal('helcimSubscriptionSchema', {})

describe('helcim subscription endpoint', () => {
  beforeEach(() => {
    vi.clearAllMocks()
    // Default: pre-update doc reflects first activation from pending_payment.
    // findOneAndUpdate returns pre-update doc; findById returns post-update doc.
    Member.findOneAndUpdate.mockResolvedValue({ _id: 'member-default', status: 'pending_payment' })
  })

  it('requires auth', async () => {
    requireAuth.mockRejectedValue(
      createError({ statusCode: 401, statusMessage: 'Unauthorized' })
    )

    const event = createMockEvent({
      method: 'POST',
      path: '/api/helcim/subscription',
      body: { customerId: 'cust-1', contributionAmount: 0, customerCode: 'code-1' }
    })

    await expect(subscriptionHandler(event)).rejects.toMatchObject({
      statusCode: 401,
      statusMessage: 'Unauthorized'
    })

    expect(requireAuth).toHaveBeenCalledWith(event)
  })

  it('free tier skips Helcim and activates member', async () => {
    requireAuth.mockResolvedValue(undefined)
    requiresPayment.mockReturnValue(false)

    const mockMember = {
      _id: 'member-1',
      email: 'test@example.com',
      name: 'Test',
      circle: 'community',
      contributionAmount: 0,
      status: 'active',
      save: vi.fn()
    }
    Member.findOneAndUpdate.mockResolvedValue({ _id: 'member-1', status: 'pending_payment' })
    Member.findById.mockResolvedValue(mockMember)

    const event = createMockEvent({
      method: 'POST',
      path: '/api/helcim/subscription',
      body: { customerId: 'cust-1', contributionAmount: 0, customerCode: 'code-1' }
    })

    const result = await subscriptionHandler(event)

    expect(result.success).toBe(true)
    expect(result.subscription).toBeNull()
    expect(result.member).toEqual({
      id: 'member-1',
      email: 'test@example.com',
      name: 'Test',
      circle: 'community',
      contributionAmount: 0,
      status: 'active'
    })
    expect(Member.findOneAndUpdate).toHaveBeenCalledWith(
      { helcimCustomerId: 'cust-1' },
      expect.objectContaining({ status: 'active', contributionAmount: 0 }),
      { new: false, projection: { status: 1 } }
    )
    expect(Member.findById).toHaveBeenCalledWith('member-1')
    expect(createHelcimSubscription).not.toHaveBeenCalled()
  })

  it('paid tier without cardToken returns 400', async () => {
    requireAuth.mockResolvedValue(undefined)
    requiresPayment.mockReturnValue(true)
    getHelcimPlanId.mockReturnValue('99999')

    const event = createMockEvent({
      method: 'POST',
      path: '/api/helcim/subscription',
      body: { customerId: 'cust-1', contributionAmount: 15, customerCode: 'code-1', cadence: 'monthly' }
    })

    await expect(subscriptionHandler(event)).rejects.toMatchObject({
      statusCode: 400,
      statusMessage: 'Payment information is required for a paid contribution'
    })
  })

  it('monthly $15 tier creates subscription with correct paymentPlanId and recurringAmount', async () => {
    requireAuth.mockResolvedValue(undefined)
    requiresPayment.mockReturnValue(true)
    getHelcimPlanId.mockReturnValue('99999')

    const mockMember = {
      _id: 'member-2',
      email: 'paid@example.com',
      name: 'Paid User',
      circle: 'founder',
      contributionAmount: 15,
      status: 'active',
    }
    Member.findOneAndUpdate.mockResolvedValue({ _id: 'member-2', status: 'pending_payment' })
    Member.findById.mockResolvedValue(mockMember)
    createHelcimSubscription.mockResolvedValue({
      data: [{ id: 'sub-monthly-1', status: 'active', nextBillingDate: '2026-05-18' }]
    })

    const event = createMockEvent({
      method: 'POST',
      path: '/api/helcim/subscription',
      body: { customerId: 'cust-1', contributionAmount: 15, customerCode: 'code-1', cardToken: 'tok-123', cadence: 'monthly' }
    })

    const result = await subscriptionHandler(event)

    expect(result.success).toBe(true)
    expect(createHelcimSubscription).toHaveBeenCalledWith(
      expect.objectContaining({ paymentPlanId: 99999, recurringAmount: 15 }),
      'idem-key-123'
    )
    expect(Member.findOneAndUpdate).toHaveBeenCalledWith(
      { helcimCustomerId: 'cust-1' },
      { $set: expect.objectContaining({ billingCadence: 'monthly', contributionAmount: 15, status: 'active' }) },
      { new: false, runValidators: false, projection: { status: 1 } }
    )
    expect(Member.findById).toHaveBeenCalledWith('member-2')
  })

  it('annual $15 tier creates subscription with correct paymentPlanId and recurringAmount', async () => {
    requireAuth.mockResolvedValue(undefined)
    requiresPayment.mockReturnValue(true)
    getHelcimPlanId.mockReturnValue('88888')

    const mockMember = {
      _id: 'member-3',
      email: 'annual@example.com',
      name: 'Annual User',
      circle: 'founder',
      contributionAmount: 15,
      status: 'active',
    }
    Member.findOneAndUpdate.mockResolvedValue({ _id: 'member-3', status: 'pending_payment' })
    Member.findById.mockResolvedValue(mockMember)
    createHelcimSubscription.mockResolvedValue({
      data: [{ id: 'sub-annual-1', status: 'active', nextBillingDate: '2027-04-18' }]
    })

    const event = createMockEvent({
      method: 'POST',
      path: '/api/helcim/subscription',
      body: { customerId: 'cust-1', contributionAmount: 15, customerCode: 'code-1', cardToken: 'tok-123', cadence: 'annual' }
    })

    const result = await subscriptionHandler(event)

    expect(result.success).toBe(true)
    expect(createHelcimSubscription).toHaveBeenCalledWith(
      expect.objectContaining({ paymentPlanId: 88888, recurringAmount: 180 }),
      'idem-key-123'
    )
    expect(Member.findOneAndUpdate).toHaveBeenCalledWith(
      { helcimCustomerId: 'cust-1' },
      { $set: expect.objectContaining({ billingCadence: 'annual', contributionAmount: 15, status: 'active' }) },
      { new: false, runValidators: false, projection: { status: 1 } }
    )
    expect(Member.findById).toHaveBeenCalledWith('member-3')
  })

  it('annual $50 tier recurringAmount is 600', async () => {
    requireAuth.mockResolvedValue(undefined)
    requiresPayment.mockReturnValue(true)
    getHelcimPlanId.mockReturnValue('88888')

    const mockMember = {
      _id: 'member-4',
      email: 'top@example.com',
      name: 'Top Tier',
      circle: 'practitioner',
      contributionAmount: 50,
      status: 'active',
    }
    Member.findOneAndUpdate.mockResolvedValue({ _id: 'member-4', status: 'pending_payment' })
    Member.findById.mockResolvedValue(mockMember)
    createHelcimSubscription.mockResolvedValue({
      data: [{ id: 'sub-annual-50', status: 'active', nextBillingDate: '2027-04-18' }]
    })

    const event = createMockEvent({
      method: 'POST',
      path: '/api/helcim/subscription',
      body: { customerId: 'cust-2', contributionAmount: 50, customerCode: 'code-2', cardToken: 'tok-456', cadence: 'annual' }
    })

    await subscriptionHandler(event)

    expect(createHelcimSubscription).toHaveBeenCalledWith(
      expect.objectContaining({ paymentPlanId: 88888, recurringAmount: 600 }),
      'idem-key-123'
    )
  })

  it('missing monthly plan id returns 500 with message, no Helcim call, no Mongo write', async () => {
    requireAuth.mockResolvedValue(undefined)
    requiresPayment.mockReturnValue(true)
    getHelcimPlanId.mockReturnValue(null)

    const event = createMockEvent({
      method: 'POST',
      path: '/api/helcim/subscription',
      body: { customerId: 'cust-1', contributionAmount: 15, customerCode: 'code-1', cardToken: 'tok-123', cadence: 'monthly' }
    })

    await expect(subscriptionHandler(event)).rejects.toMatchObject({
      statusCode: 500,
      statusMessage: 'Monthly plan id not configured',
    })

    expect(createHelcimSubscription).not.toHaveBeenCalled()
    expect(Member.findOneAndUpdate).not.toHaveBeenCalled()
  })

  it('missing annual plan id returns 500 with message, no Helcim call, no Mongo write', async () => {
    requireAuth.mockResolvedValue(undefined)
    requiresPayment.mockReturnValue(true)
    getHelcimPlanId.mockReturnValue(null)

    const event = createMockEvent({
      method: 'POST',
      path: '/api/helcim/subscription',
      body: { customerId: 'cust-1', contributionAmount: 15, customerCode: 'code-1', cardToken: 'tok-123', cadence: 'annual' }
    })

    await expect(subscriptionHandler(event)).rejects.toMatchObject({
      statusCode: 500,
      statusMessage: 'Annual plan id not configured',
    })

    expect(createHelcimSubscription).not.toHaveBeenCalled()
    expect(Member.findOneAndUpdate).not.toHaveBeenCalled()
  })

  it('logs the newest paid Helcim transaction to Payment on paid monthly creation', async () => {
    requireAuth.mockResolvedValue(undefined)
    requiresPayment.mockReturnValue(true)
    getHelcimPlanId.mockReturnValue('99999')

    const mockMember = {
      _id: 'member-9',
      email: 'log@example.com',
      name: 'Logger',
      circle: 'founder',
      contributionAmount: 15,
      status: 'active',
    }
    Member.findOneAndUpdate.mockResolvedValue({ _id: 'member-9', status: 'pending_payment' })
    Member.findById.mockResolvedValue(mockMember)
    createHelcimSubscription.mockResolvedValue({
      data: [{ id: 'sub-log-1', status: 'active', nextBillingDate: '2026-05-18' }]
    })
    listHelcimCustomerTransactions.mockResolvedValueOnce([
      { id: 'tx-newest', date: '2026-04-20', amount: 15, status: 'paid', currency: 'CAD' },
      { id: 'tx-older', date: '2026-04-19', amount: 15, status: 'paid', currency: 'CAD' }
    ])

    const event = createMockEvent({
      method: 'POST',
      path: '/api/helcim/subscription',
      body: { customerId: 'cust-log', contributionAmount: 15, customerCode: 'code-log', cardToken: 'tok', cadence: 'monthly' }
    })

    const result = await subscriptionHandler(event)

    expect(result.success).toBe(true)
    expect(listHelcimCustomerTransactions).toHaveBeenCalledWith('code-log')
    expect(upsertPaymentFromHelcim).toHaveBeenCalledWith(
      mockMember,
      expect.objectContaining({ id: 'tx-newest' }),
      { paymentType: 'monthly', sendConfirmation: true }
    )
  })

  it('uses cadence=annual when logging the initial charge on annual creation', async () => {
    requireAuth.mockResolvedValue(undefined)
    requiresPayment.mockReturnValue(true)
    getHelcimPlanId.mockReturnValue('88888')

    const mockMember = {
      _id: 'member-10',
      email: 'annuallog@example.com',
      name: 'AnnualLogger',
      circle: 'founder',
      contributionAmount: 15,
      status: 'active',
    }
    Member.findOneAndUpdate.mockResolvedValue({ _id: 'member-10', status: 'pending_payment' })
    Member.findById.mockResolvedValue(mockMember)
    createHelcimSubscription.mockResolvedValue({
      data: [{ id: 'sub-annual-log', status: 'active', nextBillingDate: '2027-04-20' }]
    })
    listHelcimCustomerTransactions.mockResolvedValueOnce([
      { id: 'tx-annual', date: '2026-04-20', amount: 180, status: 'paid', currency: 'CAD' }
    ])

    const event = createMockEvent({
      method: 'POST',
      path: '/api/helcim/subscription',
      body: { customerId: 'cust-a', contributionAmount: 15, customerCode: 'code-a', cardToken: 'tok', cadence: 'annual' }
    })

    await subscriptionHandler(event)

    expect(upsertPaymentFromHelcim).toHaveBeenCalledWith(
      mockMember,
      expect.objectContaining({ id: 'tx-annual' }),
      { paymentType: 'annual', sendConfirmation: true }
    )
  })

  it('still returns success when payment logging throws (reconciliation will catch)', async () => {
    requireAuth.mockResolvedValue(undefined)
    requiresPayment.mockReturnValue(true)
    getHelcimPlanId.mockReturnValue('99999')

    const mockMember = {
      _id: 'member-11',
      email: 'boom@example.com',
      name: 'Boom',
      circle: 'founder',
      contributionAmount: 15,
      status: 'active',
    }
    Member.findOneAndUpdate.mockResolvedValue({ _id: 'member-11', status: 'pending_payment' })
    Member.findById.mockResolvedValue(mockMember)
    createHelcimSubscription.mockResolvedValue({
      data: [{ id: 'sub-boom', status: 'active', nextBillingDate: '2026-05-18' }]
    })
    listHelcimCustomerTransactions.mockRejectedValueOnce(new Error('helcim down'))

    const event = createMockEvent({
      method: 'POST',
      path: '/api/helcim/subscription',
      body: { customerId: 'cust-boom', contributionAmount: 15, customerCode: 'code-boom', cardToken: 'tok', cadence: 'monthly' }
    })

    const result = await subscriptionHandler(event)

    expect(result.success).toBe(true)
    expect(upsertPaymentFromHelcim).not.toHaveBeenCalled()
  })

  it('first activation (pending_payment → active) sends welcome email on free tier', async () => {
    requireAuth.mockResolvedValue(undefined)
    requiresPayment.mockReturnValue(false)

    const mockMember = {
      _id: 'member-first-free',
      email: 'newbie@example.com',
      name: 'Newbie',
      circle: 'community',
      contributionAmount: 0,
      status: 'active',
    }
    // Pre-update status was pending_payment → first activation
    Member.findOneAndUpdate.mockResolvedValue({ _id: 'member-first-free', status: 'pending_payment' })
    Member.findById.mockResolvedValue(mockMember)

    const event = createMockEvent({
      method: 'POST',
      path: '/api/helcim/subscription',
      body: { customerId: 'cust-first-free', contributionAmount: 0, customerCode: 'code-1' }
    })

    await subscriptionHandler(event)

    expect(sendWelcomeEmail).toHaveBeenCalledWith(mockMember)
  })

  it('first activation (pending_payment → active) sends welcome email on paid tier', async () => {
    requireAuth.mockResolvedValue(undefined)
    requiresPayment.mockReturnValue(true)
    getHelcimPlanId.mockReturnValue('99999')

    const mockMember = {
      _id: 'member-first-paid',
      email: 'newpaid@example.com',
      name: 'NewPaid',
      circle: 'founder',
      contributionAmount: 15,
      status: 'active',
    }
    Member.findOneAndUpdate.mockResolvedValue({ _id: 'member-first-paid', status: 'pending_payment' })
    Member.findById.mockResolvedValue(mockMember)
    createHelcimSubscription.mockResolvedValue({
      data: [{ id: 'sub-first-paid', status: 'active', nextBillingDate: '2026-05-18' }]
    })

    const event = createMockEvent({
      method: 'POST',
      path: '/api/helcim/subscription',
      body: { customerId: 'cust-first-paid', contributionAmount: 15, customerCode: 'code-1', cardToken: 'tok-123', cadence: 'monthly' }
    })

    await subscriptionHandler(event)

    expect(sendWelcomeEmail).toHaveBeenCalledWith(mockMember)
  })

  it('already-active retry (active → active) does NOT send welcome email on free tier', async () => {
    requireAuth.mockResolvedValue(undefined)
    requiresPayment.mockReturnValue(false)

    const mockMember = {
      _id: 'member-retry-free',
      email: 'existing@example.com',
      name: 'Existing',
      circle: 'community',
      contributionAmount: 0,
      status: 'active',
    }
    // Pre-update status was already active → tier upgrade, not first activation
    Member.findOneAndUpdate.mockResolvedValue({ _id: 'member-retry-free', status: 'active' })
    Member.findById.mockResolvedValue(mockMember)

    const event = createMockEvent({
      method: 'POST',
      path: '/api/helcim/subscription',
      body: { customerId: 'cust-retry-free', contributionAmount: 0, customerCode: 'code-1' }
    })

    await subscriptionHandler(event)

    expect(sendWelcomeEmail).not.toHaveBeenCalled()
  })

  it('already-active retry (active → active) does NOT send welcome email on paid tier', async () => {
    requireAuth.mockResolvedValue(undefined)
    requiresPayment.mockReturnValue(true)
    getHelcimPlanId.mockReturnValue('99999')

    const mockMember = {
      _id: 'member-retry-paid',
      email: 'upgrader@example.com',
      name: 'Upgrader',
      circle: 'founder',
      contributionAmount: 25,
      status: 'active',
    }
    Member.findOneAndUpdate.mockResolvedValue({ _id: 'member-retry-paid', status: 'active' })
    Member.findById.mockResolvedValue(mockMember)
    createHelcimSubscription.mockResolvedValue({
      data: [{ id: 'sub-retry', status: 'active', nextBillingDate: '2026-05-18' }]
    })

    const event = createMockEvent({
      method: 'POST',
      path: '/api/helcim/subscription',
      body: { customerId: 'cust-retry-paid', contributionAmount: 25, customerCode: 'code-1', cardToken: 'tok-123', cadence: 'monthly' }
    })

    await subscriptionHandler(event)

    expect(sendWelcomeEmail).not.toHaveBeenCalled()
  })

  it('Helcim API failure returns 500 and does NOT activate member', async () => {
    requireAuth.mockResolvedValue(undefined)
    requiresPayment.mockReturnValue(true)
    getHelcimPlanId.mockReturnValue('99999')

    createHelcimSubscription.mockRejectedValue(new Error('Network error'))

    const event = createMockEvent({
      method: 'POST',
      path: '/api/helcim/subscription',
      body: {
        customerId: 'cust-1',
        contributionAmount: 15,
        customerCode: 'code-1',
        cardToken: 'tok-123',
        cadence: 'monthly',
      }
    })

    await expect(subscriptionHandler(event)).rejects.toMatchObject({
      statusCode: 500,
    })

    expect(Member.findOneAndUpdate).not.toHaveBeenCalled()
  })
})