/**
 * Unit tests for the executors added to bring every declared op type up to a
 * callable state through `commitPendingOperation`. Tests run through the
 * public dispatcher (executors are not exported individually) so the wiring
 * is exercised alongside executor logic.
 */
import { describe, it, expect, vi, beforeEach } from 'vitest'
import { eventBus } from '@/lib/events/bus'
import { createQueuedMockSupabase, makeInvoice, makeFiscalPeriod } from '@/tests/helpers'
import type { PendingOperation } from '@/types'

vi.mock('@/lib/core/bookkeeping/period-service', async () => {
  const actual = await vi.importActual<typeof import('@/lib/core/bookkeeping/period-service')>(
    '@/lib/core/bookkeeping/period-service'
  )
  return {
    ...actual,
    unlockPeriod: vi.fn(),
  }
})

vi.mock('@/lib/import/sie-parser', () => ({
  parseSIEFile: vi.fn(),
  calculateFileHash: vi.fn(async () => 'mock-hash'),
}))

vi.mock('@/lib/import/sie-import', () => ({
  executeSIEImport: vi.fn(),
}))

vi.mock('@/lib/bookkeeping/invoice-entries', async () => {
  const actual =
    await vi.importActual<typeof import('@/lib/bookkeeping/invoice-entries')>(
      '@/lib/bookkeeping/invoice-entries'
    )
  return {
    ...actual,
    createCreditNoteJournalEntry: vi.fn(),
  }
})

import { commitPendingOperation } from '../commit'
import { unlockPeriod } from '@/lib/core/bookkeeping/period-service'
import { parseSIEFile } from '@/lib/import/sie-parser'
import { executeSIEImport } from '@/lib/import/sie-import'
import { createCreditNoteJournalEntry } from '@/lib/bookkeeping/invoice-entries'

function makePendingOp(overrides: Partial<PendingOperation>): PendingOperation {
  return {
    id: 'op-1',
    user_id: 'user-1',
    company_id: 'company-1',
    operation_type: 'create_customer',
    status: 'pending',
    title: 'test',
    params: {},
    preview_data: {},
    result_data: null,
    actor_type: 'user',
    actor_id: null,
    actor_label: null,
    risk_level: 'high',
    auto_commit_eligible: false,
    auto_committed_at: null,
    created_at: '2026-05-03T00:00:00Z',
    resolved_at: null,
    updated_at: '2026-05-03T00:00:00Z',
    ...overrides,
  } as PendingOperation
}

beforeEach(() => {
  vi.clearAllMocks()
  eventBus.clear()
})

// ─── unlock_period ──────────────────────────────────────────────────

describe('commitPendingOperation: unlock_period', () => {
  it('happy path: clears locked_at and returns committed', async () => {
    const period = makeFiscalPeriod({ id: 'fp-1', locked_at: null })
    vi.mocked(unlockPeriod).mockResolvedValueOnce(period)

    const { supabase, enqueue } = createQueuedMockSupabase()
    enqueue({ data: { id: 'op-1' }, error: null }) // CAS claim
    enqueue({ data: null, error: null }) // dispatcher's pending_operations update

    const op = makePendingOp({
      operation_type: 'unlock_period',
      params: { fiscal_period_id: 'fp-1' },
    })

    const result = await commitPendingOperation(supabase as never, 'user-1', 'company-1', op)

    expect(result.status).toBe('committed')
    expect(result.data).toMatchObject({ period_id: 'fp-1', locked_at: null })
    expect(unlockPeriod).toHaveBeenCalledWith(expect.anything(), 'company-1', 'user-1', 'fp-1')
  })

  it('rejects when fiscal_period_id is missing', async () => {
    const { supabase, enqueue } = createQueuedMockSupabase()
    enqueue({ data: { id: 'op-1' }, error: null }) // CAS claim
    enqueue({ data: null, error: null }) // dispatcher's reject update
    const op = makePendingOp({ operation_type: 'unlock_period', params: {} })

    const result = await commitPendingOperation(supabase as never, 'user-1', 'company-1', op)

    expect(result.status).toBe('failed')
    expect(result.http_status).toBe(400)
    expect(unlockPeriod).not.toHaveBeenCalled()
  })

  it('surfaces underlying service errors', async () => {
    vi.mocked(unlockPeriod).mockRejectedValueOnce(new Error('Period is not locked'))

    const { supabase, enqueue } = createQueuedMockSupabase()
    enqueue({ data: { id: 'op-1' }, error: null }) // CAS claim
    enqueue({ data: null, error: null }) // dispatcher's reject update on throw
    const op = makePendingOp({
      operation_type: 'unlock_period',
      params: { fiscal_period_id: 'fp-1' },
    })

    const result = await commitPendingOperation(supabase as never, 'user-1', 'company-1', op)

    expect(result.status).toBe('failed')
    expect(result.error).toMatch(/not locked/)
  })
})

// ─── import_sie ─────────────────────────────────────────────────────

describe('commitPendingOperation: import_sie', () => {
  it('happy path: parses, imports, returns committed with summary', async () => {
    vi.mocked(parseSIEFile).mockReturnValueOnce({} as never)
    vi.mocked(executeSIEImport).mockResolvedValueOnce({
      success: true,
      importId: 'imp-1',
      fiscalPeriodId: 'fp-1',
      openingBalanceEntryId: 'ob-1',
      journalEntriesCreated: 5,
      journalEntryIds: ['je-1', 'je-2', 'je-3', 'je-4', 'je-5'],
      errors: [],
      warnings: ['minor warning'],
    })

    const { supabase, enqueue } = createQueuedMockSupabase()
    enqueue({ data: { id: 'op-1' }, error: null }) // CAS claim
    enqueue({ data: null, error: null }) // dispatcher's update

    const op = makePendingOp({
      operation_type: 'import_sie',
      params: {
        file_content: '#FLAGGA 0\n',
        filename: 'test.sie',
        mappings: [],
        create_fiscal_period: true,
        import_opening_balances: true,
        import_transactions: true,
      },
    })

    const result = await commitPendingOperation(supabase as never, 'user-1', 'company-1', op)

    expect(result.status).toBe('committed')
    expect(result.data).toMatchObject({
      import_id: 'imp-1',
      journal_entries_created: 5,
      warnings: ['minor warning'],
    })
    expect(parseSIEFile).toHaveBeenCalledWith('#FLAGGA 0\n')
  })

  it('rejects when required params are missing', async () => {
    const { supabase, enqueue } = createQueuedMockSupabase()
    enqueue({ data: { id: 'op-1' }, error: null }) // CAS claim
    enqueue({ data: null, error: null }) // dispatcher's reject update
    const op = makePendingOp({ operation_type: 'import_sie', params: { filename: 'x.sie' } })

    const result = await commitPendingOperation(supabase as never, 'user-1', 'company-1', op)

    expect(result.status).toBe('failed')
    expect(result.http_status).toBe(400)
    expect(parseSIEFile).not.toHaveBeenCalled()
  })

  it('returns the executeSIEImport errors when success=false', async () => {
    vi.mocked(parseSIEFile).mockReturnValueOnce({} as never)
    vi.mocked(executeSIEImport).mockResolvedValueOnce({
      success: false,
      importId: null,
      fiscalPeriodId: null,
      openingBalanceEntryId: null,
      journalEntriesCreated: 0,
      journalEntryIds: [],
      errors: ['duplicate import'],
      warnings: [],
    })

    const { supabase, enqueue } = createQueuedMockSupabase()
    enqueue({ data: { id: 'op-1' }, error: null }) // CAS claim
    enqueue({ data: null, error: null }) // dispatcher's reject update
    const op = makePendingOp({
      operation_type: 'import_sie',
      params: {
        file_content: '#FLAGGA 0\n',
        filename: 'test.sie',
        mappings: [],
        create_fiscal_period: true,
        import_opening_balances: false,
        import_transactions: true,
      },
    })

    const result = await commitPendingOperation(supabase as never, 'user-1', 'company-1', op)

    expect(result.status).toBe('failed')
    expect(result.error).toMatch(/duplicate import/)
  })
})

// ─── credit_invoice ─────────────────────────────────────────────────

describe('commitPendingOperation: credit_invoice', () => {
  it('happy path (accrual): inserts negated credit note and books JE', async () => {
    const original = makeInvoice({
      id: 'inv-1',
      invoice_number: 'F-2024001',
      status: 'sent',
      document_type: 'invoice',
      subtotal: 1000,
      vat_amount: 250,
      total: 1250,
    })
    const originalWithItems = {
      ...original,
      items: [
        { sort_order: 0, description: 'Service', quantity: 1, unit: 'st', unit_price: 1000, line_total: 1000, vat_rate: 25, vat_amount: 250 },
      ],
    }

    const creditNoteRow = { ...original, id: 'cn-1', invoice_number: 'KR-F-2024001' }
    const completeCreditNote = { ...creditNoteRow, customer: { name: 'Acme AB' }, items: [] }

    const { supabase, enqueue } = createQueuedMockSupabase()
    // 0: CAS claim
    enqueue({ data: { id: 'op-1' }, error: null })
    // 1: fetch original with items
    enqueue({ data: originalWithItems, error: null })
    // 2: insert credit note
    enqueue({ data: creditNoteRow, error: null })
    // 3: insert items (await thenable)
    enqueue({ data: null, error: null })
    // 4: update original status='credited'
    enqueue({ data: null, error: null })
    // 5: re-fetch complete credit note with customer + items
    enqueue({ data: completeCreditNote, error: null })
    // 6: company_settings
    enqueue({ data: { entity_type: 'aktiebolag', accounting_method: 'accrual' }, error: null })
    // 7: update invoice with journal_entry_id
    enqueue({ data: null, error: null })
    // 8: dispatcher's pending_operations update
    enqueue({ data: null, error: null })

    vi.mocked(createCreditNoteJournalEntry).mockResolvedValueOnce({ id: 'je-1' } as never)

    const op = makePendingOp({
      operation_type: 'credit_invoice',
      params: { invoice_id: 'inv-1', reason: 'Wrong amount' },
    })

    const result = await commitPendingOperation(supabase as never, 'user-1', 'company-1', op)

    expect(result.status).toBe('committed')
    expect(result.data).toMatchObject({ credit_note_id: 'cn-1', journal_entry_id: 'je-1' })
    expect(createCreditNoteJournalEntry).toHaveBeenCalled()
  })

  it('skips JE on cash accounting', async () => {
    const original = makeInvoice({ id: 'inv-1', status: 'paid', document_type: 'invoice' })
    const originalWithItems = { ...original, items: [] }
    const creditNoteRow = { ...original, id: 'cn-2', invoice_number: 'KR-F-2024001' }
    const completeCreditNote = { ...creditNoteRow, customer: null, items: [] }

    const { supabase, enqueue } = createQueuedMockSupabase()
    enqueue({ data: { id: 'op-1' }, error: null }) // CAS claim
    enqueue({ data: originalWithItems, error: null })
    enqueue({ data: creditNoteRow, error: null })
    enqueue({ data: null, error: null })
    enqueue({ data: null, error: null })
    enqueue({ data: completeCreditNote, error: null })
    enqueue({ data: { entity_type: 'enskild_firma', accounting_method: 'cash' }, error: null })
    // no JE update; go straight to dispatcher update
    enqueue({ data: null, error: null })

    const op = makePendingOp({
      operation_type: 'credit_invoice',
      params: { invoice_id: 'inv-1' },
    })

    const result = await commitPendingOperation(supabase as never, 'user-1', 'company-1', op)

    expect(result.status).toBe('committed')
    expect(result.data).toMatchObject({ credit_note_id: 'cn-2', journal_entry_id: null })
    expect(createCreditNoteJournalEntry).not.toHaveBeenCalled()
  })

  it('auto-rejects when invoice is already credited (409)', async () => {
    const original = makeInvoice({ id: 'inv-1', status: 'credited', document_type: 'invoice' })
    const { supabase, enqueue } = createQueuedMockSupabase()
    enqueue({ data: { id: 'op-1' }, error: null }) // CAS claim
    enqueue({ data: { ...original, items: [] }, error: null })
    // dispatcher auto-reject path also does an update
    enqueue({ data: null, error: null })

    const op = makePendingOp({
      operation_type: 'credit_invoice',
      params: { invoice_id: 'inv-1' },
    })

    const result = await commitPendingOperation(supabase as never, 'user-1', 'company-1', op)

    expect(result.status).toBe('rejected')
    expect(result.auto_rejected).toBe(true)
    expect(result.http_status).toBe(409)
  })

  it('rejects when invoice_id is missing', async () => {
    const { supabase, enqueue } = createQueuedMockSupabase()
    enqueue({ data: { id: 'op-1' }, error: null }) // CAS claim
    enqueue({ data: null, error: null }) // dispatcher's reject update
    const op = makePendingOp({ operation_type: 'credit_invoice', params: {} })

    const result = await commitPendingOperation(supabase as never, 'user-1', 'company-1', op)

    expect(result.status).toBe('failed')
    expect(result.http_status).toBe(400)
  })

  it('rejects invoices with status outside sent/paid/overdue', async () => {
    const original = makeInvoice({ id: 'inv-1', status: 'draft', document_type: 'invoice' })
    const { supabase, enqueue } = createQueuedMockSupabase()
    enqueue({ data: { id: 'op-1' }, error: null }) // CAS claim
    enqueue({ data: { ...original, items: [] }, error: null })
    enqueue({ data: null, error: null }) // dispatcher's reject update

    const op = makePendingOp({
      operation_type: 'credit_invoice',
      params: { invoice_id: 'inv-1' },
    })

    const result = await commitPendingOperation(supabase as never, 'user-1', 'company-1', op)

    expect(result.status).toBe('failed')
    expect(result.http_status).toBe(400)
  })
})