import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest'
import { ipcMain } from 'electron'
import { IPC_CHANNELS } from '@d3ro/core/ipc-channels'
import type { IPCResult } from '@d3ro/core/errors'
import type { CheckoutSessionParams, CheckoutSessionResult } from '@d3ro/core/types'

const mocks = vi.hoisted(() => {
  const invokeFunction = vi.fn()
  const activate = vi.fn()
  const getLicenseService = vi.fn(() => ({ activate }))
  const cloud = {
    isAuthenticated: vi.fn(() => true),
    getUser: vi.fn(() => ({ id: 'aaaaaaaa-aaaa-4aaa-8aaa-aaaaaaaaaaaa' })),
    invokeFunction
  }
  return { activate, cloud, getLicenseService, invokeFunction }
})

vi.mock('../../src/main/services/CloudSyncService', () => ({
  getCloudSyncService: () => mocks.cloud
}))

vi.mock('../../src/main/services/LicenseService', () => ({
  getLicenseService: mocks.getLicenseService
}))

import {
  PAYMENT_REQUEST_TIMEOUT_MS,
  registerPaymentHandlers
} from '../../src/main/ipc/payment-handlers'

type CapturedHandler = (...args: unknown[]) => unknown

const handlers = new Map<string, CapturedHandler>()
const validParams: CheckoutSessionParams = {
  tier: 'pro',
  provider: 'stripe'
}

async function invokeIpc<T>(channel: string, ...args: unknown[]): Promise<IPCResult<T>> {
  const handler = handlers.get(channel)
  if (!handler) throw new Error(`Missing IPC handler: ${channel}`)
  return (await handler({}, ...args)) as IPCResult<T>
}

function checkoutResponse(url = 'https://checkout.stripe.com/c/pay/cs_test_safe#fragment') {
  return { data: { url }, error: null }
}

beforeEach(() => {
  vi.useRealTimers()
  vi.clearAllMocks()
  handlers.clear()
  mocks.cloud.isAuthenticated.mockReturnValue(true)
  mocks.cloud.getUser.mockReturnValue({ id: 'aaaaaaaa-aaaa-4aaa-8aaa-aaaaaaaaaaaa' })
  vi.mocked(ipcMain.handle).mockImplementation((channel: string, handler: CapturedHandler) => {
    handlers.set(channel, handler)
  })
  registerPaymentHandlers()
})

afterEach(() => {
  vi.useRealTimers()
})

describe('desktop payment IPC security boundary', () => {
  it('uses the authenticated Stripe Edge checkout contract and returns only its trusted URL', async () => {
    mocks.invokeFunction.mockResolvedValue(checkoutResponse())

    const result = await invokeIpc<CheckoutSessionResult>(
      IPC_CHANNELS.PAYMENT.CREATE_CHECKOUT_SESSION,
      validParams
    )

    expect(result).toEqual({
      success: true,
      data: {
        checkoutUrl: 'https://checkout.stripe.com/c/pay/cs_test_safe#fragment',
        provider: 'stripe',
        status: 'pending'
      }
    })
    expect(mocks.invokeFunction).toHaveBeenCalledTimes(1)
    const [name, body, options] = mocks.invokeFunction.mock.calls[0]
    expect(name).toBe('stripe-checkout')
    expect(body).toEqual({
      tier: 'pro',
      success_url: 'https://d3ro.chanpaca.net/billing?desktop_checkout=success',
      cancel_url: 'https://d3ro.chanpaca.net/billing?desktop_checkout=cancelled',
      idempotency_key: expect.stringMatching(/^desktop:stripe-checkout:[0-9a-f-]{36}$/)
    })
    expect(options).toMatchObject({ timeoutMs: PAYMENT_REQUEST_TIMEOUT_MS })
    expect(options.signal).toBeInstanceOf(AbortSignal)
  })

  it.each(['toss', 'portone', 'arbitrary-provider'])(
    'rejects unsupported provider %s before network I/O',
    async (provider) => {
      const result = await invokeIpc(IPC_CHANNELS.PAYMENT.CREATE_CHECKOUT_SESSION, {
        ...validParams,
        provider
      })

      expect(result.success).toBe(false)
      expect(mocks.invokeFunction).not.toHaveBeenCalled()
    }
  )

  it.each(['free', 'team', 'enterprise', 'arbitrary-tier'])(
    'rejects renderer-selected tier %s before network I/O',
    async (tier) => {
      const result = await invokeIpc(IPC_CHANNELS.PAYMENT.CREATE_CHECKOUT_SESSION, {
        ...validParams,
        tier
      })

      expect(result.success).toBe(false)
      expect(mocks.invokeFunction).not.toHaveBeenCalled()
    }
  )

  it.each([
    'http://checkout.stripe.com/c/pay/cs_test_unsafe',
    'https://checkout.stripe.com.evil.test/c/pay/cs_test_unsafe',
    'https://checkout.stripe.com@evil.test/c/pay/cs_test_unsafe',
    'https://user:pass@checkout.stripe.com/c/pay/cs_test_unsafe',
    'https://checkout.stripe.com/portal/cs_test_unsafe'
  ])('rejects an untrusted checkout URL: %s', async (url) => {
    mocks.invokeFunction.mockResolvedValue(checkoutResponse(url))

    const result = await invokeIpc(IPC_CHANNELS.PAYMENT.CREATE_CHECKOUT_SESSION, validParams)

    expect(result.success).toBe(false)
  })

  it('fails closed on provider errors without exposing provider details', async () => {
    mocks.invokeFunction.mockResolvedValue({
      data: null,
      error: { message: 'sensitive Stripe provider details' }
    })

    const result = await invokeIpc(IPC_CHANNELS.PAYMENT.CREATE_CHECKOUT_SESSION, validParams)

    expect(result).toMatchObject({
      success: false,
      error: { message: 'Checkout service rejected the request' }
    })
    expect(JSON.stringify(result)).not.toContain('sensitive Stripe provider details')
  })

  it('fails closed on network errors without converting them into checkout success', async () => {
    mocks.invokeFunction.mockRejectedValue(new Error('sensitive network details'))

    const result = await invokeIpc(IPC_CHANNELS.PAYMENT.CREATE_CHECKOUT_SESSION, validParams)

    expect(result).toMatchObject({
      success: false,
      error: { message: 'Checkout service is unavailable' }
    })
    expect(JSON.stringify(result)).not.toContain('sensitive network details')
  })

  it('coalesces concurrent and sequential duplicate checkout requests', async () => {
    let resolveProvider: ((value: ReturnType<typeof checkoutResponse>) => void) | undefined
    mocks.invokeFunction.mockReturnValue(
      new Promise((resolve) => {
        resolveProvider = resolve
      })
    )

    const first = invokeIpc<CheckoutSessionResult>(
      IPC_CHANNELS.PAYMENT.CREATE_CHECKOUT_SESSION,
      validParams
    )
    const concurrent = invokeIpc<CheckoutSessionResult>(
      IPC_CHANNELS.PAYMENT.CREATE_CHECKOUT_SESSION,
      validParams
    )

    expect(mocks.invokeFunction).toHaveBeenCalledTimes(1)
    resolveProvider?.(checkoutResponse())
    const [firstResult, concurrentResult] = await Promise.all([first, concurrent])
    const sequentialResult = await invokeIpc<CheckoutSessionResult>(
      IPC_CHANNELS.PAYMENT.CREATE_CHECKOUT_SESSION,
      validParams
    )

    expect(firstResult).toEqual(concurrentResult)
    expect(sequentialResult).toEqual(firstResult)
    expect(mocks.invokeFunction).toHaveBeenCalledTimes(1)
  })

  it('reuses the server idempotency key when a failed checkout is retried', async () => {
    mocks.invokeFunction.mockResolvedValue({
      data: null,
      error: { message: 'provider unavailable' }
    })

    const first = await invokeIpc(IPC_CHANNELS.PAYMENT.CREATE_CHECKOUT_SESSION, validParams)
    const retry = await invokeIpc(IPC_CHANNELS.PAYMENT.CREATE_CHECKOUT_SESSION, validParams)

    expect(first.success).toBe(false)
    expect(retry.success).toBe(false)
    expect(mocks.invokeFunction).toHaveBeenCalledTimes(2)
    expect(mocks.invokeFunction.mock.calls[0][1].idempotency_key).toBe(
      mocks.invokeFunction.mock.calls[1][1].idempotency_key
    )
  })

  it('aborts and fails closed when checkout exceeds the deadline', async () => {
    vi.useFakeTimers()
    mocks.invokeFunction.mockReturnValue(new Promise(() => undefined))

    const pending = invokeIpc(IPC_CHANNELS.PAYMENT.CREATE_CHECKOUT_SESSION, validParams)
    await vi.advanceTimersByTimeAsync(PAYMENT_REQUEST_TIMEOUT_MS)
    const result = await pending

    expect(result).toMatchObject({
      success: false,
      error: { message: 'Payment server request timed out' }
    })
    const options = mocks.invokeFunction.mock.calls[0][2]
    expect(options.signal.aborted).toBe(true)
  })

  it('uses server subscription readback and never mutates the local license', async () => {
    mocks.invokeFunction.mockResolvedValue({
      data: {
        tier: 'pro_plus',
        status: 'active',
        current_period_end: '2099-01-01T00:00:00.000Z'
      },
      error: null
    })

    const result = await invokeIpc<{ success: boolean; activeTier: string }>(
      IPC_CHANNELS.PAYMENT.VERIFY_PAYMENT,
      { tier: 'enterprise' }
    )

    expect(result).toEqual({
      success: true,
      data: { success: true, activeTier: 'pro_plus' }
    })
    expect(mocks.invokeFunction).toHaveBeenCalledWith(
      'payple-manage',
      { action: 'info' },
      expect.objectContaining({ timeoutMs: PAYMENT_REQUEST_TIMEOUT_MS })
    )
    expect(mocks.getLicenseService).not.toHaveBeenCalled()
    expect(mocks.activate).not.toHaveBeenCalled()
  })

  it('does not grant an arbitrary renderer tier when the server says free', async () => {
    mocks.invokeFunction.mockResolvedValue({
      data: { tier: 'free', status: 'active', current_period_end: null },
      error: null
    })

    const result = await invokeIpc<{ success: boolean; activeTier: string }>(
      IPC_CHANNELS.PAYMENT.VERIFY_PAYMENT,
      { tier: 'enterprise' }
    )

    expect(result).toEqual({
      success: true,
      data: { success: false, activeTier: 'free' }
    })
    expect(mocks.activate).not.toHaveBeenCalled()
  })

  it('preserves prepaid cancellation until expiry and fails closed after expiry', async () => {
    mocks.invokeFunction
      .mockResolvedValueOnce({
        data: {
          tier: 'pro',
          status: 'canceled',
          current_period_end: '2099-01-01T00:00:00.000Z'
        },
        error: null
      })
      .mockResolvedValueOnce({
        data: {
          tier: 'pro',
          status: 'canceled',
          current_period_end: '2000-01-01T00:00:00.000Z'
        },
        error: null
      })

    const current = await invokeIpc<{
      tier: string
      valid: boolean
      expiresAt: number | null
    }>(IPC_CHANNELS.PAYMENT.GET_SUBSCRIPTION_STATUS)
    const expired = await invokeIpc<{
      tier: string
      valid: boolean
      expiresAt: number | null
    }>(IPC_CHANNELS.PAYMENT.GET_SUBSCRIPTION_STATUS)

    expect(current).toMatchObject({ success: true, data: { tier: 'pro', valid: true } })
    expect(expired).toMatchObject({ success: true, data: { tier: 'free', valid: false } })
  })

  it('rejects malformed or arbitrary server entitlement data', async () => {
    mocks.invokeFunction.mockResolvedValue({
      data: {
        tier: 'enterprise',
        status: 'active',
        current_period_end: '2099-01-01T00:00:00.000Z'
      },
      error: null
    })

    const result = await invokeIpc(IPC_CHANNELS.PAYMENT.GET_SUBSCRIPTION_STATUS)

    expect(result).toMatchObject({
      success: false,
      error: { message: 'Subscription status is unavailable' }
    })
  })

  it('requires an authenticated user before invoking payment functions', async () => {
    mocks.cloud.isAuthenticated.mockReturnValue(false)

    const result = await invokeIpc(IPC_CHANNELS.PAYMENT.CREATE_CHECKOUT_SESSION, validParams)

    expect(result.success).toBe(false)
    expect(mocks.invokeFunction).not.toHaveBeenCalled()
  })
})