import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest'
import { createQueuedMockSupabase } from '@/tests/helpers'
import type { SupabaseClient } from '@supabase/supabase-js'

vi.mock('@/extensions/general/whatsapp-inbox/lib/graph-api', async () => {
  const actual = await vi.importActual<
    typeof import('@/extensions/general/whatsapp-inbox/lib/graph-api')
  >('@/extensions/general/whatsapp-inbox/lib/graph-api')
  return {
    ...actual,
    sendText: vi.fn().mockResolvedValue({ ok: true, wamid: 'wamid.OUT' }),
    markReadWithTyping: vi.fn().mockResolvedValue(undefined),
    downloadMedia: vi.fn(),
  }
})

vi.mock('@/extensions/general/whatsapp-inbox/lib/company-question', async () => {
  const actual = await vi.importActual<
    typeof import('@/extensions/general/whatsapp-inbox/lib/company-question')
  >('@/extensions/general/whatsapp-inbox/lib/company-question')
  return {
    ...actual,
    askCompanyQuestion: vi.fn().mockResolvedValue(true),
  }
})

vi.mock('@/extensions/general/invoice-inbox/lib/upload-and-extract', () => ({
  uploadAndExtract: vi.fn(),
}))

vi.mock('@/lib/rate-limits/inbox', () => ({
  checkInboxUploadRateLimit: vi.fn().mockResolvedValue({ ok: true }),
}))

vi.mock('@/lib/rate-limits/agent', () => ({
  checkAgentRateLimit: vi.fn().mockResolvedValue({ ok: true }),
}))

vi.mock('@/lib/processing-history/append', () => ({
  appendProcessingHistory: vi.fn().mockResolvedValue('event-1'),
}))

vi.mock('@/lib/core/documents/document-service', () => ({
  computeSHA256: vi.fn().mockResolvedValue('sha-abc'),
}))

import {
  sendText,
  markReadWithTyping,
  downloadMedia,
  GraphApiError,
} from '@/extensions/general/whatsapp-inbox/lib/graph-api'
import { askCompanyQuestion } from '@/extensions/general/whatsapp-inbox/lib/company-question'
import { uploadAndExtract } from '@/extensions/general/invoice-inbox/lib/upload-and-extract'
import { checkInboxUploadRateLimit } from '@/lib/rate-limits/inbox'
import { appendProcessingHistory } from '@/lib/processing-history/append'
import { processInboundMessage } from '@/extensions/general/whatsapp-inbox/lib/process-inbound'
import {
  STAGED_AWAITING_COMPANY,
} from '@/extensions/general/whatsapp-inbox/lib/conversation'
import { TEMPLATE } from '@/extensions/general/whatsapp-inbox/lib/messages'

const sendTextMock = vi.mocked(sendText)
const downloadMediaMock = vi.mocked(downloadMedia)
const uploadAndExtractMock = vi.mocked(uploadAndExtract)
const rateLimitMock = vi.mocked(checkInboxUploadRateLimit)
const appendHistoryMock = vi.mocked(appendProcessingHistory)
const askCompanyQuestionMock = vi.mocked(askCompanyQuestion)

function makeRow(overrides: Record<string, unknown> = {}) {
  return {
    id: 'msg-1',
    direction: 'inbound',
    wamid: 'wamid.IN1',
    sender_phone_hash: 'hash-1',
    phone_link_id: 'link-1',
    conversation_id: 'conv-1',
    message_type: 'image',
    body_text: 'lunch med kund',
    media_id: 'media-1',
    media_mime: 'image/jpeg',
    media_sha256: null,
    media_filename: null,
    raw_payload: { from: '46701234567' },
    processing_status: 'received',
    attempts: 0,
    error_message: null,
    inbox_item_id: null,
    delivery_status: null,
    correlation_id: 'corr-1',
    acked_at: null,
    created_at: '2026-08-01T10:00:00Z',
    updated_at: '2026-08-01T10:00:00Z',
    ...overrides,
  }
}

function makeLink(overrides: Record<string, unknown> = {}) {
  return {
    id: 'link-1',
    user_id: 'user-1',
    phone_hash: 'hash-1',
    phone_enc: 'enc',
    phone_masked: '+46 70 *** ** 67',
    wa_profile_name: null,
    default_company_id: null,
    last_company_id: null,
    verified_at: '2026-08-01T09:00:00Z',
    revoked_at: null,
    muted_at: null,
    last_message_at: null,
    created_at: '2026-08-01T09:00:00Z',
    updated_at: '2026-08-01T09:00:00Z',
    ...overrides,
  }
}

function makeConversation(overrides: Record<string, unknown> = {}) {
  return {
    id: 'conv-1',
    phone_link_id: 'link-1',
    state: 'idle',
    context: {},
    company_id: null,
    service_window_expires_at: new Date(Date.now() + 60 * 60 * 1000).toISOString(),
    debounce_until: new Date().toISOString(),
    pending_ack: true,
    last_inbound_at: null,
    last_outbound_at: null,
    created_at: '2026-08-01T09:00:00Z',
    updated_at: '2026-08-01T09:00:00Z',
    ...overrides,
  }
}

function lastUpdate(findCalls: (table: string, method: string) => unknown[][]): Record<string, unknown> {
  const updates = findCalls('whatsapp_messages', 'update')
  return updates[updates.length - 1][0] as Record<string, unknown>
}

describe('processInboundMessage (media intake)', () => {
  beforeEach(() => {
    vi.clearAllMocks()
    sendTextMock.mockResolvedValue({ ok: true, wamid: 'wamid.OUT' })
    askCompanyQuestionMock.mockResolvedValue(true)
    rateLimitMock.mockResolvedValue({ ok: true })
    downloadMediaMock.mockResolvedValue({
      buffer: new Uint8Array([1, 2, 3, 4]).buffer,
      mime: 'image/jpeg',
      fileSize: 4,
    })
    uploadAndExtractMock.mockResolvedValue({
      document_id: 'doc-1',
      inbox_item_id: 'item-1',
      status: 'received',
      extracted_data: {
        supplier: { name: 'Espresso House' },
        totals: { total: 450 },
        invoice: { invoiceDate: '2026-07-30' },
      },
      matched_supplier_id: null,
      matched_transaction_id: null,
      extraction_skipped: false,
      skip_reason: null,
      page_count: null,
    } as never)
  })

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

  it('happy path: claims, ingests, marks done, and sends NO ack (the burst winner acks)', async () => {
    const { supabase, enqueue, findCalls } = createQueuedMockSupabase()
    enqueue({ data: makeRow() }) // load row
    enqueue({ data: { id: 'msg-1' } }) // claim
    enqueue({ data: makeLink() }) // load link
    enqueue({ data: makeConversation() }) // load conversation
    enqueue({ data: [{ company_id: 'company-1' }] }) // sole membership
    enqueue({ data: null }) // sha256 dup check: none
    enqueue({ data: null }) // item channel_context load
    enqueue({ data: null }) // item channel_context update
    enqueue({ data: null }) // final markStatus done

    const outcome = await processInboundMessage(supabase as unknown as SupabaseClient, 'msg-1')

    expect(outcome).toEqual({ kind: 'media_processed', conversationId: 'conv-1' })
    expect(markReadWithTyping).toHaveBeenCalledWith('wamid.IN1')
    expect(downloadMediaMock).toHaveBeenCalledWith('media-1')
    expect(uploadAndExtractMock).toHaveBeenCalledWith(
      supabase,
      'user-1',
      'company-1',
      expect.objectContaining({ type: 'image/jpeg' }),
      'whatsapp',
      undefined,
      undefined,
      {
        channelMeta: { whatsappMessageId: 'msg-1', caption: 'lunch med kund' },
        actorId: 'whatsapp-inbound',
      },
    )

    // company_selected_via lands on the item.
    const itemUpdates = findCalls('invoice_inbox_items', 'update')
    expect(itemUpdates).toHaveLength(1)
    const contextArg = (itemUpdates[0][0] as { channel_context: Record<string, unknown> })
      .channel_context
    expect(contextArg.company_selected_via).toBe('single')

    const finalUpdate = lastUpdate(findCalls)
    expect(finalUpdate.processing_status).toBe('done')
    expect(finalUpdate.inbox_item_id).toBe('item-1')

    // The per-receipt ack is debounced: this worker never sends it.
    expect(sendTextMock).not.toHaveBeenCalled()
  })

  it('does nothing when the claim is lost (already processing)', async () => {
    const { supabase, enqueue } = createQueuedMockSupabase()
    enqueue({ data: makeRow() })
    enqueue({ data: null }) // claim matched no row

    const outcome = await processInboundMessage(supabase as unknown as SupabaseClient, 'msg-1')

    expect(outcome).toEqual({ kind: 'none' })
    expect(downloadMediaMock).not.toHaveBeenCalled()
    expect(uploadAndExtractMock).not.toHaveBeenCalled()
    expect(sendTextMock).not.toHaveBeenCalled()
  })

  it('rejects disallowed MIME types with M15, skipped, and no download', async () => {
    const { supabase, enqueue, findCalls } = createQueuedMockSupabase()
    enqueue({ data: makeRow({ media_mime: 'video/mp4', message_type: 'document' }) })
    enqueue({ data: { id: 'msg-1' } })
    enqueue({ data: makeLink() })
    enqueue({ data: makeConversation() })
    enqueue({ data: null }) // markStatus skipped

    await processInboundMessage(supabase as unknown as SupabaseClient, 'msg-1')

    expect(downloadMediaMock).not.toHaveBeenCalled()
    expect(uploadAndExtractMock).not.toHaveBeenCalled()
    expect(sendTextMock).toHaveBeenCalledTimes(1)
    expect(sendTextMock.mock.calls[0][1].template).toBe(TEMPLATE.m15Unsupported)
    expect(lastUpdate(findCalls).processing_status).toBe('skipped')
  })

  it('multi-company sender without pin/default: parks the row and asks the company question', async () => {
    const { supabase, enqueue, findCalls } = createQueuedMockSupabase()
    enqueue({ data: makeRow() })
    enqueue({ data: { id: 'msg-1' } })
    enqueue({ data: makeLink() })
    enqueue({ data: makeConversation() })
    enqueue({ data: [{ company_id: 'company-1' }, { company_id: 'company-2' }] })
    enqueue({ data: null }) // markStatus skipped (staged)
    enqueue({ data: null, count: 1 }) // staged count

    const outcome = await processInboundMessage(supabase as unknown as SupabaseClient, 'msg-1')

    expect(outcome).toEqual({ kind: 'media_staged', conversationId: 'conv-1' })
    expect(uploadAndExtractMock).not.toHaveBeenCalled()
    expect(downloadMediaMock).not.toHaveBeenCalled()
    // Parked with the staged marker, not dropped.
    const staged = lastUpdate(findCalls)
    expect(staged.processing_status).toBe('skipped')
    expect(staged.error_message).toBe(STAGED_AWAITING_COMPANY)
    expect(askCompanyQuestionMock).toHaveBeenCalledTimes(1)
    expect(askCompanyQuestionMock.mock.calls[0][1]).toMatchObject({
      to: '46701234567',
      stagedCount: 1,
    })
  })

  it('uses a live conversation pin over everything and stamps via=pin', async () => {
    const pinExpiry = new Date(Date.now() + 2 * 60 * 60 * 1000).toISOString()
    const { supabase, enqueue, findCalls } = createQueuedMockSupabase()
    enqueue({ data: makeRow() })
    enqueue({ data: { id: 'msg-1' } })
    enqueue({ data: makeLink({ default_company_id: 'company-7' }) })
    enqueue({
      data: makeConversation({ company_id: 'company-9', context: { pin_expires_at: pinExpiry } }),
    })
    enqueue({ data: { company_id: 'company-9' } }) // pin membership check
    enqueue({ data: null }) // sliding pin refresh (context update)
    enqueue({ data: null }) // dup check
    enqueue({ data: null }) // item context load
    enqueue({ data: null }) // item context update
    enqueue({ data: null }) // markStatus done

    await processInboundMessage(supabase as unknown as SupabaseClient, 'msg-1')

    expect(uploadAndExtractMock).toHaveBeenCalledWith(
      supabase,
      'user-1',
      'company-9',
      expect.anything(),
      'whatsapp',
      undefined,
      undefined,
      expect.anything(),
    )
    // Sliding TTL: the pin refresh pushed pin_expires_at forward.
    const conversationUpdates = findCalls('whatsapp_conversations', 'update')
    const refresh = conversationUpdates.find((args) => {
      const patch = args[0] as { context?: { pin_expires_at?: string } }
      return patch.context?.pin_expires_at != null
    })
    expect(refresh).toBeTruthy()
    const refreshed = (refresh![0] as { context: { pin_expires_at: string } }).context
      .pin_expires_at
    expect(new Date(refreshed).getTime()).toBeGreaterThan(new Date(pinExpiry).getTime())
    // Item records that a pin resolved the company.
    const itemUpdate = findCalls('invoice_inbox_items', 'update')[0][0] as {
      channel_context: Record<string, unknown>
    }
    expect(itemUpdate.channel_context.company_selected_via).toBe('pin')
  })

  it('an EXPIRED pin no longer resolves: multi-company sender is asked again', async () => {
    const { supabase, enqueue } = createQueuedMockSupabase()
    enqueue({ data: makeRow() })
    enqueue({ data: { id: 'msg-1' } })
    enqueue({ data: makeLink() })
    enqueue({
      data: makeConversation({
        company_id: 'company-9',
        context: { pin_expires_at: new Date(Date.now() - 1000).toISOString() },
      }),
    })
    enqueue({ data: [{ company_id: 'company-1' }, { company_id: 'company-2' }] })
    enqueue({ data: null }) // markStatus skipped
    enqueue({ data: null, count: 1 }) // staged count

    const outcome = await processInboundMessage(supabase as unknown as SupabaseClient, 'msg-1')

    expect(outcome.kind).toBe('media_staged')
    expect(uploadAndExtractMock).not.toHaveBeenCalled()
    expect(askCompanyQuestionMock).toHaveBeenCalledTimes(1)
  })

  it('uses the default company when set and still a member', async () => {
    const { supabase, enqueue } = createQueuedMockSupabase()
    enqueue({ data: makeRow() })
    enqueue({ data: { id: 'msg-1' } })
    enqueue({ data: makeLink({ default_company_id: 'company-7' }) })
    enqueue({ data: makeConversation() })
    enqueue({ data: { company_id: 'company-7' } }) // membership check for default
    enqueue({ data: null }) // dup check
    enqueue({ data: null }) // item context load
    enqueue({ data: null }) // item context update
    enqueue({ data: null }) // markStatus done

    await processInboundMessage(supabase as unknown as SupabaseClient, 'msg-1')

    expect(uploadAndExtractMock).toHaveBeenCalledWith(
      supabase,
      'user-1',
      'company-7',
      expect.anything(),
      'whatsapp',
      undefined,
      undefined,
      expect.anything(),
    )
  })

  it('rate limit: drops with M17 once, records RateLimitedDropped, never a retryable status', async () => {
    rateLimitMock.mockResolvedValue({ ok: false, scope: 'minute', retryAfterSec: 60 })
    const { supabase, enqueue, findCalls } = createQueuedMockSupabase()
    enqueue({ data: makeRow() })
    enqueue({ data: { id: 'msg-1' } })
    enqueue({ data: makeLink() })
    enqueue({ data: makeConversation() })
    enqueue({ data: [{ company_id: 'company-1' }] })
    enqueue({ data: null }) // M17 notice check: none sent yet
    enqueue({ data: null }) // markStatus skipped

    await processInboundMessage(supabase as unknown as SupabaseClient, 'msg-1')

    expect(appendHistoryMock).toHaveBeenCalledWith(
      expect.objectContaining({ eventType: 'RateLimitedDropped', companyId: 'company-1' }),
    )
    expect(sendTextMock).toHaveBeenCalledTimes(1)
    expect(sendTextMock.mock.calls[0][1].template).toBe(TEMPLATE.m17RateLimited)
    expect(downloadMediaMock).not.toHaveBeenCalled()
    expect(uploadAndExtractMock).not.toHaveBeenCalled()
    expect(lastUpdate(findCalls).processing_status).toBe('skipped')
  })

  it('rate limit: stays silent when an M17 already went out inside the window', async () => {
    rateLimitMock.mockResolvedValue({ ok: false, scope: 'minute', retryAfterSec: 60 })
    const { supabase, enqueue } = createQueuedMockSupabase()
    enqueue({ data: makeRow() })
    enqueue({ data: { id: 'msg-1' } })
    enqueue({ data: makeLink() })
    enqueue({ data: makeConversation() })
    enqueue({ data: [{ company_id: 'company-1' }] })
    enqueue({ data: { id: 'earlier-m17' } }) // notice already sent
    enqueue({ data: null }) // markStatus skipped

    await processInboundMessage(supabase as unknown as SupabaseClient, 'msg-1')

    expect(sendTextMock).not.toHaveBeenCalled()
  })

  it('exact sha256 duplicate: M4-duplicate ack and no item created', async () => {
    const { supabase, enqueue, findCalls } = createQueuedMockSupabase()
    enqueue({ data: makeRow() })
    enqueue({ data: { id: 'msg-1' } })
    enqueue({ data: makeLink() })
    enqueue({ data: makeConversation() })
    enqueue({ data: [{ company_id: 'company-1' }] })
    enqueue({ data: null }) // no inbox item for this message yet
    enqueue({ data: { id: 'existing-doc' } }) // dup found
    enqueue({ data: null }) // markStatus skipped

    await processInboundMessage(supabase as unknown as SupabaseClient, 'msg-1')

    expect(uploadAndExtractMock).not.toHaveBeenCalled()
    expect(sendTextMock).toHaveBeenCalledTimes(1)
    expect(sendTextMock.mock.calls[0][1].template).toBe(TEMPLATE.m4Duplicate)
    expect(lastUpdate(findCalls).processing_status).toBe('skipped')
  })

  it('a new file while awaiting_resend supersedes the old item and closes the question', async () => {
    const { supabase, enqueue, findCalls } = createQueuedMockSupabase()
    enqueue({ data: makeRow() })
    enqueue({ data: { id: 'msg-1' } })
    enqueue({ data: makeLink() })
    enqueue({
      data: makeConversation({
        state: 'awaiting_resend',
        context: {
          pending_question: {
            type: 'resend',
            inbox_item_id: 'item-old',
            asked_at: '2026-08-01T09:30:00Z',
          },
          recent_questions: [
            {
              type: 'resend',
              inbox_item_id: 'item-old',
              asked_at: '2026-08-01T09:30:00Z',
              status: 'open',
            },
          ],
        },
      }),
    })
    enqueue({ data: [{ company_id: 'company-1' }] })
    enqueue({ data: null }) // dup check
    enqueue({ data: null }) // new item context load
    enqueue({ data: null }) // new item context update
    enqueue({
      data: {
        channel_context: {
          channel: 'whatsapp',
          quality: { resend_requested_at: '2026-08-01T09:30:00Z' },
          pending_question: { type: 'resend', asked_at: '2026-08-01T09:30:00Z', status: 'open' },
        },
      },
    }) // old item context load
    enqueue({ data: null }) // old item context update
    enqueue({ data: null }) // conversation -> idle
    enqueue({ data: { company_id: 'company-1', correlation_id: null } }) // history item lookup
    enqueue({ data: null }) // markStatus done

    await processInboundMessage(supabase as unknown as SupabaseClient, 'msg-1')

    const itemUpdates = findCalls('invoice_inbox_items', 'update')
    const oldItemPatch = itemUpdates[1][0] as { channel_context: Record<string, unknown> }
    expect(oldItemPatch.channel_context.quality).toMatchObject({
      resent: true,
      superseded: true,
    })
    expect(
      (oldItemPatch.channel_context.pending_question as { status: string }).status,
    ).toBe('answered')

    const conversationUpdates = findCalls('whatsapp_conversations', 'update')
    const idleUpdate = conversationUpdates.find(
      (args) => (args[0] as { state?: string }).state === 'idle',
    )
    expect(idleUpdate).toBeTruthy()
  })

  it('wraps failures: error status + error_message + a single M18', async () => {
    downloadMediaMock.mockRejectedValue(new GraphApiError('Media download failed (500)', 500))
    const { supabase, enqueue, findCalls } = createQueuedMockSupabase()
    enqueue({ data: makeRow() })
    enqueue({ data: { id: 'msg-1' } })
    enqueue({ data: makeLink() })
    enqueue({ data: makeConversation() })
    enqueue({ data: [{ company_id: 'company-1' }] })
    enqueue({ data: null }) // no inbox item yet
    enqueue({ data: null }) // markStatus error
    enqueue({ data: null }) // no M18 sent yet

    await processInboundMessage(supabase as unknown as SupabaseClient, 'msg-1')

    const finalUpdate = lastUpdate(findCalls)
    expect(finalUpdate.processing_status).toBe('error')
    expect(String(finalUpdate.error_message)).toContain('download failed')
    expect(sendTextMock).toHaveBeenCalledTimes(1)
    expect(sendTextMock.mock.calls[0][1].template).toBe(TEMPLATE.m18Error)
  })

  it('still sends M18 on a re-claim when the first attempt died before the catch', async () => {
    // Gating M18 on `attempt <= 1` made it unreachable for exactly the crash
    // the sweep exists for: the dead first attempt already burned its
    // attempt, so the sender heard nothing about that receipt at all.
    downloadMediaMock.mockRejectedValue(new GraphApiError('still failing'))
    const { supabase, enqueue, findCalls } = createQueuedMockSupabase()
    enqueue({ data: makeRow({ attempts: 1 }) })
    enqueue({ data: { id: 'msg-1' } })
    enqueue({ data: makeLink() })
    enqueue({ data: makeConversation() })
    enqueue({ data: [{ company_id: 'company-1' }] })
    enqueue({ data: null }) // no inbox item yet
    enqueue({ data: null }) // markStatus error
    enqueue({ data: null }) // no M18 sent for this message yet

    await processInboundMessage(supabase as unknown as SupabaseClient, 'msg-1')

    expect(lastUpdate(findCalls).processing_status).toBe('error')
    expect(sendTextMock).toHaveBeenCalledTimes(1)
    expect(sendTextMock.mock.calls[0][1].template).toBe(TEMPLATE.m18Error)
  })

  it('never repeats M18 when one already went out for the same message', async () => {
    downloadMediaMock.mockRejectedValue(new GraphApiError('still failing'))
    const { supabase, enqueue, findCalls } = createQueuedMockSupabase()
    enqueue({ data: makeRow({ attempts: 2 }) })
    enqueue({ data: { id: 'msg-1' } })
    enqueue({ data: makeLink() })
    enqueue({ data: makeConversation() })
    enqueue({ data: [{ company_id: 'company-1' }] })
    enqueue({ data: null }) // no inbox item yet
    enqueue({ data: null }) // markStatus error
    enqueue({ data: { id: 'out-1' } }) // an M18 for this correlation exists

    await processInboundMessage(supabase as unknown as SupabaseClient, 'msg-1')

    expect(lastUpdate(findCalls).processing_status).toBe('error')
    expect(sendTextMock).not.toHaveBeenCalled()
  })

  it('adopts an item a concurrent worker already created instead of ingesting twice', async () => {
    const { supabase, enqueue, findCalls } = createQueuedMockSupabase()
    enqueue({ data: makeRow() })
    enqueue({ data: { id: 'msg-1' } })
    enqueue({ data: makeLink() })
    enqueue({ data: makeConversation() })
    enqueue({ data: [{ company_id: 'company-1' }] })
    enqueue({ data: { id: 'item-winner' } }) // the winner's item
    enqueue({ data: null }) // markStatus done

    await processInboundMessage(supabase as unknown as SupabaseClient, 'msg-1')

    expect(downloadMediaMock).not.toHaveBeenCalled()
    expect(uploadAndExtractMock).not.toHaveBeenCalled()
    const finalUpdate = lastUpdate(findCalls)
    expect(finalUpdate.processing_status).toBe('done')
    expect(finalUpdate.inbox_item_id).toBe('item-winner')
  })
})