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

const { fetchMock, handlers } = vi.hoisted(() => ({
  fetchMock: vi.fn(),
  handlers: new Map<string, (_event: unknown, args?: unknown) => unknown>()
}))

vi.mock('electron', () => ({
  app: { getVersion: () => '1.2.3-test' },
  ipcMain: {
    handle: vi.fn((channel: string, handler: (_event: unknown, args?: unknown) => unknown) => {
      handlers.set(channel, handler)
    }),
    removeHandler: vi.fn((channel: string) => handlers.delete(channel))
  },
  net: { fetch: (...args: unknown[]) => fetchMock(...args) }
}))

import { MAX_FEEDBACK_IMAGE_RESPONSE_BYTES } from './feedback-image-attachments'
import { registerFeedbackHandlers, submitFeedback } from './feedback'

function okResponse(): Response {
  return { ok: true, status: 200 } as unknown as Response
}

function errorResponse(status: number): Response {
  return { ok: false, status } as unknown as Response
}

function requestInit(callIndex = 0): RequestInit {
  return fetchMock.mock.calls[callIndex]?.[1] as RequestInit
}

function postedBody(callIndex = 0): Record<string, unknown> {
  return JSON.parse(String(requestInit(callIndex).body)) as Record<string, unknown>
}

function diagnosticSubmitArgs(): Parameters<typeof submitFeedback>[0] {
  return {
    feedback: '[Crash Report]\n\nDiagnostic log:\n- Status: attached',
    feedbackWithoutDiagnosticBundle:
      '[Crash Report]\n\nDiagnostic log:\n- Status: not uploaded\n- Reason: attachment failed',
    submissionType: 'crash',
    submitAnonymously: true,
    githubLogin: null,
    githubEmail: null,
    diagnosticBundle: {
      bundleSubmissionId: 'bundleabcdefghijklmnop',
      content: '{"type":"bundle-header"}\n',
      bytes: 25,
      spanCount: 1
    }
  }
}

describe('submitFeedback', () => {
  beforeEach(() => {
    vi.useRealTimers()
    handlers.clear()
    fetchMock.mockReset()
    fetchMock.mockResolvedValue(okResponse())
  })

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

  it('strips GitHub identity and anonymous contact fields when submitted anonymously', async () => {
    const anonymousArgs = {
      feedback: 'private bug report',
      submitAnonymously: true,
      githubLogin: 'trusted-user',
      githubEmail: 'trusted@example.com',
      anonymousGithubLogin: 'trusted-user',
      anonymousEmail: 'trusted@example.com',
      anonymousX: 'trusted'
    }
    await submitFeedback(anonymousArgs)

    const body = postedBody()
    expect(body).toMatchObject({
      feedback: 'private bug report',
      submissionType: 'feedback',
      githubLogin: null,
      githubEmail: null,
      appVersion: '1.2.3-test'
    })
    expect(body).not.toHaveProperty('anonymousGithubLogin')
    expect(body).not.toHaveProperty('anonymousEmail')
    expect(body).not.toHaveProperty('anonymousX')
  })

  it('preserves verified GitHub identity when not submitted anonymously', async () => {
    await submitFeedback({
      feedback: 'public bug report',
      submitAnonymously: false,
      githubLogin: 'trusted-user',
      githubEmail: 'trusted@example.com'
    })

    const body = postedBody()
    expect(body).toMatchObject({
      feedback: 'public bug report',
      submissionType: 'feedback',
      githubLogin: 'trusted-user',
      githubEmail: 'trusted@example.com',
      appVersion: '1.2.3-test'
    })
  })

  it('preserves crash submissions for the crash report lane', async () => {
    await submitFeedback({
      feedback: '[Crash Report]',
      submissionType: 'crash',
      submitAnonymously: false,
      githubLogin: 'trusted-user',
      githubEmail: null
    } as Parameters<typeof submitFeedback>[0])

    expect(postedBody()).toMatchObject({
      feedback: '[Crash Report]',
      submissionType: 'crash',
      githubLogin: 'trusted-user',
      githubEmail: null
    })
  })

  it('attaches diagnostic bundles only to crash submissions', async () => {
    const diagnosticBundle = {
      bundleSubmissionId: 'bundleabcdefghijklmnop',
      content: '{"type":"bundle-header"}\n',
      bytes: 25,
      spanCount: 1
    }
    await submitFeedback({
      feedback: '[Crash Report]',
      submissionType: 'crash',
      submitAnonymously: true,
      githubLogin: null,
      githubEmail: null,
      diagnosticBundle
    } as Parameters<typeof submitFeedback>[0])
    await submitFeedback({
      feedback: 'normal feedback',
      submitAnonymously: true,
      githubLogin: null,
      githubEmail: null,
      diagnosticBundle
    } as Parameters<typeof submitFeedback>[0])

    const crashInit = fetchMock.mock.calls[0]?.[1] as RequestInit | undefined
    const feedbackInit = fetchMock.mock.calls[1]?.[1] as RequestInit | undefined
    const crashFormData = crashInit?.body as FormData
    expect(crashFormData).toBeInstanceOf(FormData)
    expect(crashInit?.headers).toBeUndefined()
    expect(crashFormData.get('submissionType')).toBe('crash')
    expect(crashFormData.get('diagnosticBundleSubmissionId')).toBe(
      diagnosticBundle.bundleSubmissionId
    )
    expect(crashFormData.get('diagnosticBundleBytes')).toBe(String(diagnosticBundle.bytes))
    expect(crashFormData.get('diagnosticBundleSpanCount')).toBe(String(diagnosticBundle.spanCount))
    const file = crashFormData.get('diagnosticBundleFile')
    expect(file).toBeInstanceOf(Blob)
    await expect((file as Blob).text()).resolves.toBe(diagnosticBundle.content)
    expect(JSON.parse(String(feedbackInit?.body))).not.toHaveProperty('diagnosticBundle')
  })

  it('retries a rejected diagnostic attachment as report-only JSON on the website API', async () => {
    fetchMock.mockResolvedValueOnce(errorResponse(413)).mockResolvedValueOnce(okResponse())

    await expect(submitFeedback(diagnosticSubmitArgs())).resolves.toEqual({
      ok: true,
      diagnosticBundleFailure: { status: 413, error: 'status 413' }
    })

    expect(fetchMock).toHaveBeenCalledTimes(2)
    expect(fetchMock.mock.calls[0]?.[0]).toBe('https://www.onorca.dev/v1/feedback')
    expect(requestInit(0).body).toBeInstanceOf(FormData)
    expect(fetchMock.mock.calls[1]?.[0]).toBe('https://www.onorca.dev/v1/feedback')
    expect(requestInit(1).headers).toEqual({
      'Content-Type': 'application/json'
    })
    expect(postedBody(1)).toMatchObject({
      feedback:
        '[Crash Report]\n\nDiagnostic log:\n- Status: not uploaded\n- Reason: attachment failed',
      submissionType: 'crash'
    })
    expect(postedBody(1)).not.toHaveProperty('diagnosticBundle')
  })

  it('retries a diagnostic attachment server error as report-only JSON on the website API', async () => {
    fetchMock.mockResolvedValueOnce(errorResponse(502)).mockResolvedValueOnce(okResponse())

    await expect(submitFeedback(diagnosticSubmitArgs())).resolves.toEqual({
      ok: true,
      diagnosticBundleFailure: { status: 502, error: 'status 502' }
    })

    expect(fetchMock.mock.calls[1]?.[0]).toBe('https://www.onorca.dev/v1/feedback')
    expect(requestInit(1).headers).toEqual({ 'Content-Type': 'application/json' })
    expect(postedBody(1)).not.toHaveProperty('diagnosticBundle')
  })

  it('retries a diagnostic attachment network error as report-only JSON on the website API', async () => {
    fetchMock.mockRejectedValueOnce(new Error('attachment network failed'))
    fetchMock.mockResolvedValueOnce(okResponse())

    await expect(submitFeedback(diagnosticSubmitArgs())).resolves.toEqual({
      ok: true,
      diagnosticBundleFailure: { status: null, error: 'attachment network failed' }
    })

    expect(fetchMock).toHaveBeenCalledTimes(2)
    expect(fetchMock.mock.calls[1]?.[0]).toBe('https://www.onorca.dev/v1/feedback')
    expect(requestInit(1).body).not.toBeInstanceOf(FormData)
    expect(postedBody(1)).not.toHaveProperty('diagnosticBundle')
  })

  it('allows 60 seconds for a diagnostic attachment before retrying report-only JSON', async () => {
    vi.useFakeTimers()
    fetchMock.mockImplementationOnce((_url: string, init?: RequestInit) => {
      return new Promise((_resolve, reject) => {
        init?.signal?.addEventListener('abort', () => reject(new Error('runtime abort text')))
      })
    })
    fetchMock.mockResolvedValueOnce(okResponse())
    const result = submitFeedback(diagnosticSubmitArgs())

    await vi.advanceTimersByTimeAsync(59_999)
    expect(fetchMock).toHaveBeenCalledTimes(1)
    await vi.advanceTimersByTimeAsync(1)

    await expect(result).resolves.toEqual({
      ok: true,
      diagnosticBundleFailure: { status: null, error: 'request timed out after 60 seconds' }
    })
    expect(fetchMock).toHaveBeenCalledTimes(2)
    expect(fetchMock.mock.calls[1]?.[0]).toBe('https://www.onorca.dev/v1/feedback')
    expect(postedBody(1)).not.toHaveProperty('diagnosticBundle')
  })

  it('retries a proxy-rejected diagnostic attachment as website JSON', async () => {
    fetchMock.mockResolvedValueOnce(errorResponse(403)).mockResolvedValueOnce(okResponse())

    await expect(submitFeedback(diagnosticSubmitArgs())).resolves.toEqual({
      ok: true,
      diagnosticBundleFailure: { status: 403, error: 'status 403' }
    })
    expect(fetchMock.mock.calls[1]?.[0]).toBe('https://www.onorca.dev/v1/feedback')
    expect(requestInit(1).body).not.toBeInstanceOf(FormData)
  })

  it.each([401, 409, 429])(
    'does not retry a diagnostic attachment rejected with status %s',
    async (status) => {
      fetchMock.mockResolvedValueOnce(errorResponse(status))

      await expect(submitFeedback(diagnosticSubmitArgs())).resolves.toEqual({
        ok: false,
        status,
        error: `status ${status}`
      })
      expect(fetchMock).toHaveBeenCalledTimes(1)
    }
  )

  it('preserves attachment and report-only failures when the degraded retry fails', async () => {
    fetchMock.mockRejectedValueOnce(new Error('attachment network failed'))
    fetchMock.mockRejectedValueOnce(new Error('report-only network failed'))

    await expect(submitFeedback(diagnosticSubmitArgs())).resolves.toEqual({
      ok: false,
      status: null,
      error: 'report-only network failed',
      diagnosticBundleFailure: { status: null, error: 'attachment network failed' }
    })
    expect(fetchMock).toHaveBeenCalledTimes(2)
  })

  it('retries the website API when the primary feedback request stalls', async () => {
    vi.useFakeTimers()
    fetchMock.mockImplementationOnce((_url: string, init?: RequestInit) => {
      return new Promise((_resolve, reject) => {
        init?.signal?.addEventListener('abort', () => reject(new Error('request aborted')))
      })
    })
    fetchMock.mockResolvedValueOnce(okResponse())

    const result = submitFeedback({
      feedback: 'stalled primary',
      submitAnonymously: false,
      githubLogin: 'trusted-user',
      githubEmail: 'trusted@example.com'
    })
    await vi.advanceTimersByTimeAsync(10_000)

    await expect(Promise.race([result, Promise.resolve('pending')])).resolves.toEqual({ ok: true })
    expect(fetchMock).toHaveBeenCalledTimes(2)
    expect(fetchMock.mock.calls.map(([url]) => url)).toEqual([
      'https://www.onorca.dev/v1/feedback',
      'https://www.onorca.dev/v1/feedback'
    ])
  })

  it('does not retry a non-diagnostic 404', async () => {
    fetchMock.mockResolvedValueOnce(errorResponse(404))

    await expect(
      submitFeedback({
        feedback: 'missing feedback route',
        submitAnonymously: true,
        githubLogin: null,
        githubEmail: null
      })
    ).resolves.toEqual({ ok: false, status: 404, error: 'status 404' })
    expect(fetchMock).toHaveBeenCalledTimes(1)
    expect(fetchMock.mock.calls[0]?.[0]).toBe('https://www.onorca.dev/v1/feedback')
  })

  it('does not retry again when the website retry stalls after a primary server error', async () => {
    vi.useFakeTimers()
    fetchMock.mockResolvedValueOnce(errorResponse(500))
    fetchMock.mockImplementationOnce((_url: string, init?: RequestInit) => {
      return new Promise((_resolve, reject) => {
        init?.signal?.addEventListener('abort', () => reject(new Error('retry aborted')))
      })
    })

    const result = submitFeedback({
      feedback: 'primary 500 and retry stalled',
      submitAnonymously: false,
      githubLogin: 'trusted-user',
      githubEmail: 'trusted@example.com'
    })
    await vi.advanceTimersByTimeAsync(10_000)

    await expect(Promise.race([result, Promise.resolve('pending')])).resolves.toEqual({
      ok: false,
      status: null,
      error: 'status 500; retry: request timed out after 10 seconds'
    })
    expect(fetchMock).toHaveBeenCalledTimes(2)
    expect(fetchMock.mock.calls.map(([url]) => url)).toEqual([
      'https://www.onorca.dev/v1/feedback',
      'https://www.onorca.dev/v1/feedback'
    ])
  })

  it('preserves the primary status when a same-host retry also returns a server error', async () => {
    fetchMock.mockResolvedValueOnce(errorResponse(502)).mockResolvedValueOnce(errorResponse(503))

    await expect(
      submitFeedback({
        feedback: 'primary and retry both server errors',
        submitAnonymously: true,
        githubLogin: null,
        githubEmail: null
      })
    ).resolves.toEqual({
      ok: false,
      status: 503,
      error: 'status 502; retry: status 503'
    })
    expect(fetchMock).toHaveBeenCalledTimes(2)
  })

  it('posts to the website API first so crash reports use the snippet-capable route', async () => {
    await submitFeedback({
      feedback: '[Crash Report]',
      submissionType: 'crash',
      submitAnonymously: true,
      githubLogin: null,
      githubEmail: null
    } as Parameters<typeof submitFeedback>[0])

    expect(fetchMock.mock.calls[0]?.[0]).toBe('https://www.onorca.dev/v1/feedback')
  })

  it('forces renderer IPC submissions onto the feedback lane', async () => {
    registerFeedbackHandlers()
    await handlers.get('feedback:submit')?.(null, {
      feedback: 'not a crash report',
      submissionType: 'crash',
      submitAnonymously: false,
      githubLogin: 'trusted-user',
      githubEmail: null
    })

    expect(postedBody()).toMatchObject({
      feedback: 'not a crash report',
      submissionType: 'feedback',
      githubLogin: 'trusted-user',
      githubEmail: null
    })
  })

  describe('image attachments', () => {
    function pngImage(bytes = 8): { contentType: string; data: Uint8Array } {
      return { contentType: 'image/png', data: new Uint8Array(bytes).fill(1) }
    }

    function imageSubmitArgs(
      images: { contentType: string; data: Uint8Array }[]
    ): Parameters<typeof submitFeedback>[0] {
      return {
        feedback: 'images attached',
        submissionType: 'feedback',
        githubLogin: 'someone',
        githubEmail: null,
        images
      }
    }

    function jsonResponse(body: unknown): Response {
      return Response.json(body, { status: 202 })
    }

    it('sends attached images as multipart form parts', async () => {
      await submitFeedback(imageSubmitArgs([pngImage(), pngImage()]))

      const body = requestInit().body as FormData
      expect(body).toBeInstanceOf(FormData)
      expect(body.getAll('feedbackImage')).toHaveLength(2)
      expect(body.get('feedback')).toBe('images attached')
      // Why: multipart must not lose the enrichment fields the JSON lane sends.
      expect(body.get('submissionType')).toBe('feedback')
      expect(body.get('appVersion')).toBe('1.2.3-test')
    })

    it('keeps the JSON lane when nothing is attached', async () => {
      await submitFeedback(imageSubmitArgs([]))

      expect(requestInit().body).not.toBeInstanceOf(FormData)
      expect(postedBody().feedback).toBe('images attached')
    })

    it('reports partial delivery when the server could not attach the images', async () => {
      fetchMock.mockResolvedValue(jsonResponse({ ok: true, imagesDelivered: false }))

      await expect(submitFeedback(imageSubmitArgs([pngImage()]))).resolves.toEqual({
        ok: true,
        imagesDelivered: false
      })
    })

    it('accepts the production atomic-success response when it omits the image result', async () => {
      fetchMock.mockResolvedValue(jsonResponse({ ok: true }))

      await expect(submitFeedback(imageSubmitArgs([pngImage()]))).resolves.toEqual({
        ok: true,
        imagesDelivered: true
      })
    })

    it('reports unconfirmed delivery for a settled non-JSON 2xx', async () => {
      fetchMock.mockResolvedValue({
        ok: true,
        status: 202,
        json: async () => {
          throw new SyntaxError('Unexpected token')
        }
      } as unknown as Response)

      await expect(submitFeedback(imageSubmitArgs([pngImage()]))).resolves.toEqual({
        ok: true,
        imagesDelivered: false
      })
    })

    it('reports unconfirmed delivery when the response body aborts before the deadline', async () => {
      fetchMock.mockResolvedValue({
        ok: true,
        status: 202,
        json: async () => {
          throw new TypeError('terminated')
        }
      } as unknown as Response)

      await expect(submitFeedback(imageSubmitArgs([pngImage()]))).resolves.toEqual({
        ok: true,
        imagesDelivered: false
      })
      expect(requestInit().signal).toMatchObject({ aborted: false })
    })

    it('bounds the image-delivery response body', async () => {
      fetchMock.mockResolvedValue(
        new Response('x'.repeat(MAX_FEEDBACK_IMAGE_RESPONSE_BYTES + 1), { status: 202 })
      )

      await expect(submitFeedback(imageSubmitArgs([pngImage()]))).resolves.toEqual({
        ok: true,
        imagesDelivered: false
      })
    })

    it('fails a stalled delivery response body at the attachment timeout', async () => {
      vi.useFakeTimers()
      fetchMock.mockImplementation((_url: string, init?: RequestInit) =>
        Promise.resolve({
          ok: true,
          status: 202,
          json: () =>
            new Promise((_resolve, reject) => {
              init?.signal?.addEventListener('abort', () => reject(new Error('body aborted')))
            })
        } as unknown as Response)
      )

      const result = submitFeedback(imageSubmitArgs([pngImage()]))
      await vi.advanceTimersByTimeAsync(60_000)

      await expect(result).resolves.toEqual({
        ok: false,
        status: null,
        error: 'request timed out after 60 seconds'
      })
      expect(requestInit().signal).toMatchObject({ aborted: true })
    })

    it('rejects unsupported image types before any request is made', async () => {
      const result = await submitFeedback(
        imageSubmitArgs([{ contentType: 'application/pdf', data: new Uint8Array(4) }])
      )

      expect(result.ok).toBe(false)
      expect(fetchMock).not.toHaveBeenCalled()
    })

    // Why: the renderer screens types first, so this lane only matters for a
    // renderer invoking the channel directly — the case the handler guards.
    it('rejects a prototype member posing as a content type over IPC', async () => {
      registerFeedbackHandlers()
      const result = (await handlers.get('feedback:submit')?.(null, {
        feedback: 'images attached',
        githubLogin: null,
        githubEmail: null,
        images: [{ contentType: 'constructor', data: new Uint8Array(4).fill(1) }]
      })) as { ok: boolean; error?: string }

      expect(result).toMatchObject({ ok: false, error: 'Unsupported image type.' })
      expect(fetchMock).not.toHaveBeenCalled()
    })

    it('rejects malformed IPC bytes before typed-array normalization', async () => {
      registerFeedbackHandlers()
      const result = (await handlers.get('feedback:submit')?.(null, {
        feedback: 'images attached',
        githubLogin: null,
        githubEmail: null,
        images: [{ contentType: 'image/png', data: '8388608' }]
      })) as { ok: boolean; error?: string }

      expect(result).toMatchObject({ ok: false, error: 'Invalid image attachment bytes.' })
      expect(fetchMock).not.toHaveBeenCalled()
    })

    it('rejects oversized IPC batches before normalizing their entries', async () => {
      registerFeedbackHandlers()
      const result = (await handlers.get('feedback:submit')?.(null, {
        feedback: 'images attached',
        githubLogin: null,
        githubEmail: null,
        images: Array.from({ length: 5 }, () => ({
          contentType: 'image/png',
          data: '8388608'
        }))
      })) as { ok: boolean; error?: string }

      expect(result).toMatchObject({ ok: false, error: 'Attach 4 images or fewer.' })
      expect(fetchMock).not.toHaveBeenCalled()
    })

    it('rejects more images than the supported count', async () => {
      const result = await submitFeedback(
        imageSubmitArgs(Array.from({ length: 5 }, () => pngImage()))
      )

      expect(result.ok).toBe(false)
      expect(fetchMock).not.toHaveBeenCalled()
    })

    it('does not fail a crash report over images it was never going to send', async () => {
      // Why: the crash lane discards images, so validating them there would
      // abort a crash report the user needs delivered.
      await submitFeedback({
        ...diagnosticSubmitArgs(),
        images: Array.from({ length: 9 }, () => ({
          contentType: 'application/pdf',
          data: new Uint8Array(0)
        }))
      } as Parameters<typeof submitFeedback>[0])

      expect(fetchMock).toHaveBeenCalledTimes(1)
      const body = requestInit().body as FormData
      expect(body.getAll('feedbackImage')).toHaveLength(0)
      expect(body.get('submissionType')).toBe('crash')
    })

    it('drops images from crash submissions', async () => {
      await submitFeedback({
        ...diagnosticSubmitArgs(),
        images: [pngImage()]
      } as Parameters<typeof submitFeedback>[0])

      const body = requestInit().body as FormData
      expect(body.getAll('feedbackImage')).toHaveLength(0)
      expect(body.get('diagnosticBundleSubmissionId')).toBe('bundleabcdefghijklmnop')
    })
  })
})