import { describe, it, expect } from 'vitest'
import { isTransactionBooked, getPrimaryJournalEntryId } from '../is-booked'

describe('isTransactionBooked', () => {
  it('returns false for a tx with no journal entry, payments, or voucher links', () => {
    const tx = { id: 'tx-1', journal_entry_id: null }
    expect(isTransactionBooked(tx)).toBe(false)
    expect(isTransactionBooked(tx, [], [])).toBe(false)
  })

  it('returns true when transactions.journal_entry_id is set (1:1 case)', () => {
    const tx = { id: 'tx-1', journal_entry_id: 'je-1' }
    expect(isTransactionBooked(tx)).toBe(true)
  })

  it('returns true when a matching invoice_payments row exists (multi-allocation)', () => {
    const tx = { id: 'tx-1', journal_entry_id: null }
    const payments = [{ transaction_id: 'tx-1' }]
    expect(isTransactionBooked(tx, payments)).toBe(true)
  })

  it('returns true when a matching supplier_invoice_payments row exists', () => {
    const tx = { id: 'tx-1', journal_entry_id: null }
    const payments = [{ transaction_id: 'tx-1' }]
    expect(isTransactionBooked(tx, payments)).toBe(true)
  })

  it('returns true when a transaction_voucher_links row references the tx (bulk-book)', () => {
    const tx = { id: 'tx-1', journal_entry_id: null }
    const links = [{ transaction_id: 'tx-1' }]
    expect(isTransactionBooked(tx, [], links)).toBe(true)
  })

  it('ignores payment / voucher-link rows that reference a different tx', () => {
    const tx = { id: 'tx-1', journal_entry_id: null }
    const payments = [{ transaction_id: 'tx-other' }]
    const links = [{ transaction_id: 'tx-other' }]
    expect(isTransactionBooked(tx, payments, links)).toBe(false)
  })
})

describe('getPrimaryJournalEntryId', () => {
  it('returns null when nothing is anchored', () => {
    const tx = { id: 'tx-1', journal_entry_id: null }
    expect(getPrimaryJournalEntryId(tx)).toBeNull()
  })

  it('prefers transactions.journal_entry_id when set', () => {
    const tx = { id: 'tx-1', journal_entry_id: 'je-1' }
    const payments = [{ transaction_id: 'tx-1', journal_entry_id: 'je-payment' }]
    const links = [{ transaction_id: 'tx-1', journal_entry_id: 'je-link' }]
    expect(getPrimaryJournalEntryId(tx, payments, links)).toBe('je-1')
  })

  it('falls back to voucher-link when tx.journal_entry_id is null', () => {
    const tx = { id: 'tx-1', journal_entry_id: null }
    const links = [{ transaction_id: 'tx-1', journal_entry_id: 'je-link' }]
    expect(getPrimaryJournalEntryId(tx, [], links)).toBe('je-link')
  })

  it('falls back to invoice_payments JE when no link exists', () => {
    const tx = { id: 'tx-1', journal_entry_id: null }
    const payments = [{ transaction_id: 'tx-1', journal_entry_id: 'je-payment' }]
    expect(getPrimaryJournalEntryId(tx, payments, [])).toBe('je-payment')
  })

  it('returns null when matching payment has journal_entry_id=null', () => {
    // Edge: an invoice_payments row that pre-dates the JE creation (the
    // engine's non-blocking JE write can leave this null briefly).
    const tx = { id: 'tx-1', journal_entry_id: null }
    const payments = [{ transaction_id: 'tx-1', journal_entry_id: null }]
    expect(getPrimaryJournalEntryId(tx, payments, [])).toBeNull()
  })
})