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

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

import {
  completeInboxItemsForBookedTransaction,
  propagateUnderlagForBookedTransaction,
  resolveBookedJournalEntryIds,
  resolveUnderlagAnchoring,
} from '../inbox-underlag'
import { linkToJournalEntry } from '@/lib/core/documents/document-service'

const COMPANY = 'company-1'
const TX1 = 'tx-1'
const TX2 = 'tx-2'
const JE1 = 'je-1'
const JE2 = 'je-2'

describe('resolveBookedJournalEntryIds', () => {
  beforeEach(() => vi.clearAllMocks())

  it('returns an empty map without querying for an empty id list', async () => {
    const { supabase, calls } = createQueuedMockSupabase()
    const map = await resolveBookedJournalEntryIds(supabase as unknown as SupabaseClient, COMPANY, [])
    expect(map.size).toBe(0)
    expect(calls.length).toBe(0)
  })

  it('resolves direct journal_entry_id and falls back to voucher links', async () => {
    const { supabase, enqueue } = createQueuedMockSupabase()
    enqueue({
      data: [
        { id: TX1, journal_entry_id: JE1 },
        { id: TX2, journal_entry_id: null },
      ],
    })
    // Voucher-link fallback runs only for the unbooked remainder (TX2).
    enqueue({ data: [{ transaction_id: TX2, journal_entry_id: JE2 }] })

    const map = await resolveBookedJournalEntryIds(supabase as unknown as SupabaseClient, COMPANY, [
      TX1,
      TX2,
    ])
    expect(map.get(TX1)).toBe(JE1)
    expect(map.get(TX2)).toBe(JE2)
  })

  it('omits transactions booked by neither route', async () => {
    const { supabase, enqueue } = createQueuedMockSupabase()
    enqueue({ data: [{ id: TX1, journal_entry_id: null }] })
    enqueue({ data: [] }) // no voucher links either

    const map = await resolveBookedJournalEntryIds(supabase as unknown as SupabaseClient, COMPANY, [
      TX1,
    ])
    expect(map.size).toBe(0)
  })
})

describe('propagateUnderlagForBookedTransaction', () => {
  beforeEach(() => vi.clearAllMocks())

  it('links the document and stamps the matched item', async () => {
    const { supabase, enqueue, findCalls } = createQueuedMockSupabase()
    enqueue({ data: { document_id: null } }) // tx pin lookup: nothing pinned
    enqueue({ data: [{ id: 'i1', document_id: 'doc-1' }] }) // matched items
    enqueue({ data: { journal_entry_id: null } }) // doc not yet anchored
    enqueue({ data: null }) // stamp update

    await propagateUnderlagForBookedTransaction(
      supabase as unknown as SupabaseClient,
      COMPANY,
      TX1,
      JE1,
    )

    expect(linkToJournalEntry).toHaveBeenCalledWith(expect.anything(), COMPANY, 'doc-1', JE1)
    const stamps = findCalls('invoice_inbox_items', 'update')
    expect(stamps).toContainEqual([{ created_journal_entry_id: JE1 }])
  })

  it('skips the document write when it already points at the verifikat', async () => {
    const { supabase, enqueue, findCalls } = createQueuedMockSupabase()
    enqueue({ data: { document_id: null } }) // tx pin lookup: nothing pinned
    enqueue({ data: [{ id: 'i1', document_id: 'doc-1' }] })
    enqueue({ data: { journal_entry_id: JE1 } }) // already anchored to JE1
    enqueue({ data: null }) // stamp update

    await propagateUnderlagForBookedTransaction(
      supabase as unknown as SupabaseClient,
      COMPANY,
      TX1,
      JE1,
    )

    expect(linkToJournalEntry).not.toHaveBeenCalled()
    expect(findCalls('invoice_inbox_items', 'update')).toContainEqual([
      { created_journal_entry_id: JE1 },
    ])
  })

  it('never steals a document anchored to another verifikat, and does not stamp', async () => {
    // The doc stays on its verifikat, but THIS transaction's verifikat then
    // has no underlag from the item: stamping it consumed would hide the
    // mismatch from every future run and from manual reconciliation
    // (BFL 5 kap 6-7 §).
    const { supabase, enqueue, findCalls } = createQueuedMockSupabase()
    enqueue({ data: { document_id: null } }) // tx pin lookup: nothing pinned
    enqueue({ data: [{ id: 'i1', document_id: 'doc-1' }] })
    enqueue({ data: { journal_entry_id: 'je-other' } })

    await propagateUnderlagForBookedTransaction(
      supabase as unknown as SupabaseClient,
      COMPANY,
      TX1,
      JE1,
    )

    expect(linkToJournalEntry).not.toHaveBeenCalled()
    expect(findCalls('invoice_inbox_items', 'update')).toEqual([])
  })

  it('stamps an item without a document (no document read)', async () => {
    const { supabase, enqueue, findCalls } = createQueuedMockSupabase()
    enqueue({ data: { document_id: null } }) // tx pin lookup: nothing pinned
    enqueue({ data: [{ id: 'i1', document_id: null }] })
    enqueue({ data: null }) // stamp update

    await propagateUnderlagForBookedTransaction(
      supabase as unknown as SupabaseClient,
      COMPANY,
      TX1,
      JE1,
    )

    expect(linkToJournalEntry).not.toHaveBeenCalled()
    expect(findCalls('document_attachments', 'select').length).toBe(0)
    expect(findCalls('invoice_inbox_items', 'update')).toContainEqual([
      { created_journal_entry_id: JE1 },
    ])
  })

  it('tolerates the UNIQUE violation when a sibling item already claimed the verifikat', async () => {
    // Samlingsverifikat: created_journal_entry_id is UNIQUE, so on N matched
    // items only the first stamp lands. The rest must resolve quietly: the
    // inbox list derives "booked" from the transaction's state for them.
    const { supabase, enqueue } = createQueuedMockSupabase()
    enqueue({ data: { document_id: null } }) // tx pin lookup: nothing pinned
    enqueue({ data: [{ id: 'i1', document_id: null }] })
    enqueue({ data: null, error: { code: '23505', message: 'duplicate key value' } })

    await expect(
      propagateUnderlagForBookedTransaction(
        supabase as unknown as SupabaseClient,
        COMPANY,
        TX1,
        JE1,
      ),
    ).resolves.toBeUndefined()
  })

  it('does NOT stamp when the document link fails, so a re-run can still repair it', async () => {
    // Stamping over a failed link would hide the item from the
    // `.is('created_journal_entry_id', null)` query forever, leaving a
    // posted verifikation without its underlag reference (BFL 5 kap 6-7 §)
    // and nothing left to surface or repair it.
    vi.mocked(linkToJournalEntry).mockRejectedValueOnce(new Error('period locked'))
    const { supabase, enqueue, findCalls } = createQueuedMockSupabase()
    enqueue({ data: { document_id: null } }) // tx pin lookup: nothing pinned
    enqueue({ data: [{ id: 'i1', document_id: 'doc-1' }] })
    enqueue({ data: { journal_entry_id: null } })

    await expect(
      propagateUnderlagForBookedTransaction(
        supabase as unknown as SupabaseClient,
        COMPANY,
        TX1,
        JE1,
      ),
    ).resolves.toBeUndefined()
    expect(findCalls('invoice_inbox_items', 'update')).toEqual([])
  })

  // ── The transaction's own pinned document (transactions.document_id) ──
  // A doc attached directly to the transaction has no inbox item to carry
  // it, so the propagation must anchor it itself: this was the 2026-08-13
  // "Underlag saknas" gap (attach-before-book via the manual booking dialog).

  it('anchors the pinned document even when no inbox item exists', async () => {
    const { supabase, enqueue, findCalls } = createQueuedMockSupabase()
    enqueue({ data: { document_id: 'doc-pin' } }) // tx pin lookup
    enqueue({ data: { journal_entry_id: null } }) // pinned doc not yet anchored
    enqueue({ data: [] }) // no matched inbox items

    await propagateUnderlagForBookedTransaction(
      supabase as unknown as SupabaseClient,
      COMPANY,
      TX1,
      JE1,
    )

    expect(linkToJournalEntry).toHaveBeenCalledWith(expect.anything(), COMPANY, 'doc-pin', JE1)
    expect(findCalls('invoice_inbox_items', 'update')).toEqual([])
  })

  it('leaves a pinned document that already points at this verifikat alone', async () => {
    const { supabase, enqueue } = createQueuedMockSupabase()
    enqueue({ data: { document_id: 'doc-pin' } })
    enqueue({ data: { journal_entry_id: JE1 } }) // already anchored here
    enqueue({ data: [] })

    await propagateUnderlagForBookedTransaction(
      supabase as unknown as SupabaseClient,
      COMPANY,
      TX1,
      JE1,
    )

    expect(linkToJournalEntry).not.toHaveBeenCalled()
  })

  it('never steals a pinned document anchored to another verifikat', async () => {
    const { supabase, enqueue } = createQueuedMockSupabase()
    enqueue({ data: { document_id: 'doc-pin' } })
    enqueue({ data: { journal_entry_id: 'je-other' } })
    enqueue({ data: [] })

    await propagateUnderlagForBookedTransaction(
      supabase as unknown as SupabaseClient,
      COMPANY,
      TX1,
      JE1,
    )

    expect(linkToJournalEntry).not.toHaveBeenCalled()
  })

  it('still processes inbox items when the pinned-document link fails', async () => {
    vi.mocked(linkToJournalEntry).mockRejectedValueOnce(new Error('period locked'))
    const { supabase, enqueue, findCalls } = createQueuedMockSupabase()
    enqueue({ data: { document_id: 'doc-pin' } })
    enqueue({ data: { journal_entry_id: null } }) // pinned doc; link will throw
    enqueue({ data: [{ id: 'i1', document_id: null }] }) // docless matched item
    enqueue({ data: null }) // stamp update

    await expect(
      propagateUnderlagForBookedTransaction(
        supabase as unknown as SupabaseClient,
        COMPANY,
        TX1,
        JE1,
      ),
    ).resolves.toBeUndefined()
    expect(findCalls('invoice_inbox_items', 'update')).toContainEqual([
      { created_journal_entry_id: JE1 },
    ])
  })

  it('links a document shared by the pin and a matched item only once', async () => {
    const { supabase, enqueue, findCalls } = createQueuedMockSupabase()
    enqueue({ data: { document_id: 'doc-1' } }) // pin points at the same doc
    enqueue({ data: { journal_entry_id: null } }) // pin leg links it
    enqueue({ data: [{ id: 'i1', document_id: 'doc-1' }] }) // matched item, same doc
    enqueue({ data: { journal_entry_id: JE1 } }) // item leg finds it anchored
    enqueue({ data: null }) // stamp update

    await propagateUnderlagForBookedTransaction(
      supabase as unknown as SupabaseClient,
      COMPANY,
      TX1,
      JE1,
    )

    expect(linkToJournalEntry).toHaveBeenCalledTimes(1)
    expect(findCalls('invoice_inbox_items', 'update')).toContainEqual([
      { created_journal_entry_id: JE1 },
    ])
  })
})

describe('completeInboxItemsForBookedTransaction', () => {
  beforeEach(() => vi.clearAllMocks())

  it('is a no-op for an unbooked transaction', async () => {
    const { supabase, enqueue, findCalls } = createQueuedMockSupabase()
    enqueue({ data: [{ id: TX1, journal_entry_id: null }] })
    enqueue({ data: [] }) // no voucher links

    const result = await completeInboxItemsForBookedTransaction(
      supabase as unknown as SupabaseClient,
      COMPANY,
      TX1,
    )
    expect(result).toBeNull()
    expect(findCalls('invoice_inbox_items', 'select').length).toBe(0)
  })

  it('skips the resolution fetch when the caller passes the direct id', async () => {
    const { supabase, enqueue, findCalls } = createQueuedMockSupabase()
    enqueue({ data: { document_id: null } }) // tx pin lookup inside propagate
    enqueue({ data: [] }) // matched items (none)

    const result = await completeInboxItemsForBookedTransaction(
      supabase as unknown as SupabaseClient,
      COMPANY,
      TX1,
      { directJournalEntryId: JE1 },
    )
    expect(result).toBe(JE1)
    // The only transactions read is the pin lookup inside the propagation:
    // the id/journal_entry_id resolution query never runs.
    expect(findCalls('transactions', 'select')).toEqual([['document_id']])
  })

  it('resolves the samlingsverifikat through voucher links when the direct id is null', async () => {
    const { supabase, enqueue, findCalls } = createQueuedMockSupabase()
    enqueue({ data: [{ transaction_id: TX1, journal_entry_id: JE2 }] }) // voucher links
    enqueue({ data: { document_id: null } }) // tx pin lookup inside propagate
    enqueue({ data: [{ id: 'i1', document_id: null }] }) // matched items
    enqueue({ data: null }) // stamp update

    const result = await completeInboxItemsForBookedTransaction(
      supabase as unknown as SupabaseClient,
      COMPANY,
      TX1,
      { directJournalEntryId: null },
    )
    expect(result).toBe(JE2)
    expect(findCalls('invoice_inbox_items', 'update')).toContainEqual([
      { created_journal_entry_id: JE2 },
    ])
  })

  it('anchors a pinned document against the samlingsverifikat on attach-after-bulk-book', async () => {
    // A bulk-booked tx keeps transactions.journal_entry_id null: its verifikat
    // hangs off transaction_voucher_links. A document attached AFTER that
    // booking (with no inbox item) must still land on the samlingsverifikat:
    // voucher-link resolution feeds the pin leg of the propagation.
    const { supabase, enqueue, findCalls } = createQueuedMockSupabase()
    enqueue({ data: [{ transaction_id: TX1, journal_entry_id: JE2 }] }) // voucher links
    enqueue({ data: { document_id: 'doc-pin' } }) // tx pin lookup
    enqueue({ data: { journal_entry_id: null } }) // pinned doc unanchored
    enqueue({ data: [] }) // no matched inbox items

    const result = await completeInboxItemsForBookedTransaction(
      supabase as unknown as SupabaseClient,
      COMPANY,
      TX1,
      { directJournalEntryId: null },
    )
    expect(result).toBe(JE2)
    expect(linkToJournalEntry).toHaveBeenCalledWith(expect.anything(), COMPANY, 'doc-pin', JE2)
    expect(findCalls('invoice_inbox_items', 'update')).toEqual([])
  })
})

describe('resolveUnderlagAnchoring', () => {
  beforeEach(() => vi.clearAllMocks())

  it('reads an item without a document as anchored, without querying', async () => {
    // No underlag to carry onto the verifikat: only the stamp is missing.
    const { supabase, calls } = createQueuedMockSupabase()
    const map = await resolveUnderlagAnchoring(supabase as unknown as SupabaseClient, COMPANY, [
      { id: 'i1', document_id: null, journalEntryId: JE1 },
    ])
    expect(map.get('i1')).toEqual({ status: 'anchored', document_journal_entry_id: null })
    expect(calls.length).toBe(0)
  })

  it('classifies anchored, unlinked and anchored_elsewhere from one batched select', async () => {
    const { supabase, enqueue, findCalls } = createQueuedMockSupabase()
    enqueue({
      data: [
        { id: 'doc-a', journal_entry_id: JE1 },
        { id: 'doc-b', journal_entry_id: null },
        { id: 'doc-c', journal_entry_id: JE2 },
      ],
    })

    const map = await resolveUnderlagAnchoring(supabase as unknown as SupabaseClient, COMPANY, [
      { id: 'i-a', document_id: 'doc-a', journalEntryId: JE1 },
      { id: 'i-b', document_id: 'doc-b', journalEntryId: JE1 },
      { id: 'i-c', document_id: 'doc-c', journalEntryId: JE1 },
      { id: 'i-none', document_id: null, journalEntryId: JE1 },
    ])

    expect(map.get('i-a')?.status).toBe('anchored')
    expect(map.get('i-b')?.status).toBe('unlinked')
    expect(map.get('i-c')).toEqual({ status: 'anchored_elsewhere', document_journal_entry_id: JE2 })
    expect(map.get('i-none')?.status).toBe('anchored')
    const selects = findCalls('document_attachments', 'select')
    expect(selects.length).toBe(1)
    expect(findCalls('document_attachments', 'in')).toEqual([['id', ['doc-a', 'doc-b', 'doc-c']]])
  })

  it('reads an unlinked item whose verifikat sits in a locked or closed period as unlinked_locked', async () => {
    const { supabase, enqueue, findCalls } = createQueuedMockSupabase()
    enqueue({
      data: [
        { id: 'doc-a', journal_entry_id: null },
        { id: 'doc-b', journal_entry_id: null },
        { id: 'doc-c', journal_entry_id: null },
        { id: 'doc-d', journal_entry_id: JE1 },
      ],
    })
    enqueue({
      data: [
        { id: JE1, fiscal_period: { is_closed: false, locked_at: '2026-08-01T00:00:00Z' } },
        { id: JE2, fiscal_period: { is_closed: true, locked_at: null } },
        { id: 'je-open', fiscal_period: { is_closed: false, locked_at: null } },
      ],
    })

    const map = await resolveUnderlagAnchoring(supabase as unknown as SupabaseClient, COMPANY, [
      { id: 'i-a', document_id: 'doc-a', journalEntryId: JE1 },
      { id: 'i-b', document_id: 'doc-b', journalEntryId: JE2 },
      { id: 'i-c', document_id: 'doc-c', journalEntryId: 'je-open' },
      { id: 'i-d', document_id: 'doc-d', journalEntryId: JE1 },
    ])

    expect(map.get('i-a')).toEqual({ status: 'unlinked_locked', document_journal_entry_id: null })
    expect(map.get('i-b')).toEqual({ status: 'unlinked_locked', document_journal_entry_id: null })
    expect(map.get('i-c')?.status).toBe('unlinked')
    // Already anchored: the lock does not matter and it is not looked up.
    expect(map.get('i-d')?.status).toBe('anchored')
    expect(findCalls('journal_entries', 'in')).toEqual([['id', [JE1, JE2, 'je-open']]])
    // The bare `fiscal_periods(...)` embed is ambiguous on prod (fiscal_periods
    // has closing_entry_id and opening_balance_entry_id back to journal_entries)
    // and made every lock-state read fail on the first cron run (2026-08-29).
    expect(findCalls('journal_entries', 'select')).toEqual([
      ['id, fiscal_period:fiscal_periods!journal_entries_fiscal_period_id_fkey(is_closed, locked_at)'],
    ])
  })

  it('keeps an unlinked item unlinked (retryable) when the lock-state read fails', async () => {
    const { supabase, enqueue } = createQueuedMockSupabase()
    enqueue({ data: [{ id: 'doc-a', journal_entry_id: null }] })
    enqueue({ data: null, error: { message: 'boom' } })
    const map = await resolveUnderlagAnchoring(supabase as unknown as SupabaseClient, COMPANY, [
      { id: 'i-a', document_id: 'doc-a', journalEntryId: JE1 },
    ])
    expect(map.get('i-a')?.status).toBe('unlinked')
  })

  it('leaves items absent (unknown, not anchored) when the document read fails', async () => {
    const { supabase, enqueue } = createQueuedMockSupabase()
    enqueue({ data: null, error: { message: 'boom' } })
    const map = await resolveUnderlagAnchoring(supabase as unknown as SupabaseClient, COMPANY, [
      { id: 'i-a', document_id: 'doc-a', journalEntryId: JE1 },
      { id: 'i-none', document_id: null, journalEntryId: JE1 },
    ])
    expect(map.has('i-a')).toBe(false)
    expect(map.get('i-none')?.status).toBe('anchored')
  })

  it('leaves an item absent when its document row is not returned', async () => {
    const { supabase, enqueue } = createQueuedMockSupabase()
    enqueue({ data: [] })
    const map = await resolveUnderlagAnchoring(supabase as unknown as SupabaseClient, COMPANY, [
      { id: 'i-a', document_id: 'doc-a', journalEntryId: JE1 },
    ])
    expect(map.has('i-a')).toBe(false)
  })
})