const { test } = require('node:test')
const assert = require('node:assert/strict')
const fs = require('node:fs')
const vm = require('node:vm')
const ts = require('typescript')
const path = require('node:path')

function loadModule(file) {
  const filename = path.resolve(__dirname, file)
  const module = { exports: {} }
  const localRequire = id => id.startsWith('.') ? loadModule(path.relative(__dirname, path.resolve(path.dirname(filename), id + '.ts'))) : require(id)
  vm.runInNewContext(ts.transpile(fs.readFileSync(filename, 'utf8'), { module: ts.ModuleKind.CommonJS, target: ts.ScriptTarget.ES2022, esModuleInterop: true }), { module, exports: module.exports, require: localRequire })
  return module.exports
}
const { getBankAllocationAmounts, getBankAllocationTaxBreakdown } = loadModule('../utils/bankAllocationTax.ts')
const { getStatementAccountExpenseTotal, getStatementAllocationDepreciationAmount } = loadModule('../composables/useDepreciation.ts')
const allocation = (amount, datevTaxKey, extra = {}) => ({ bankstatement: { id: 42 }, account: 13, amount, datevTaxKey, ...extra })

for (const [gross, key, net, tax, side, rate] of [
  [-119, '9', -100, -19, 'input', 19], [-107, '8', -100, -7, 'input', 7],
  [119, '3', 100, 19, 'output', 19], [107, '2', 100, 7, 'output', 7],
  [59.5, '9', 50, 9.5, 'input', 19], [-59.5, '3', -50, -9.5, 'output', 19],
]) {
  test(`gross ${gross} and key ${key} produce correct net, VAT and refund signs`, () => {
    const item = allocation(gross, key)
    const amounts = getBankAllocationAmounts(item)
    assert.equal(amounts.amountGross, gross)
    assert.equal(amounts.amountNet, net)
    assert.equal(amounts.amountTax, tax)
    const result = getBankAllocationTaxBreakdown(item)
    assert.equal(result[side][`net${rate}`], net * (side === 'input' ? -1 : 1))
    assert.equal(result[side][`tax${rate}`], tax * (side === 'input' ? -1 : 1))
  })
}
test('rounding preserves gross, and tax-free and legacy allocations retain their amounts', () => {
  const amounts = getBankAllocationAmounts(allocation(-10, '9'))
  assert.equal(amounts.amountNet, -8.4)
  assert.equal(amounts.amountTax, -1.6)
  for (const key of ['40', null]) {
    const value = getBankAllocationAmounts(allocation(-100, key))
    assert.equal(value.amountNet, -100)
    assert.equal(value.amountTax, 0)
  }
})
test('invoice settlements, archived bookings and manual bookings are not counted again', () => {
  for (const extra of [{ incominginvoice: 1 }, { createddocument: 1 }, { archived: true }, { bankstatement: null }]) {
    const result = getBankAllocationTaxBreakdown(allocation(-119, '9', extra))
    assert.ok([...Object.values(result.input), ...Object.values(result.output)].every(value => value === 0))
  }
})
test('additional accounts carry the same tax breakdown', () => {
  assert.equal(getBankAllocationAmounts(allocation(-119, '9', { account: null, ownaccount: 'own' })).amountTax, -19)
})
test('BWA separates net expenses from gross cash flows including partial refunds', () => {
  const items = [allocation(-119, '9'), allocation(59.5, '9')]
  assert.equal(getStatementAccountExpenseTotal(items), 50)
  assert.equal(getStatementAccountExpenseTotal(items, true), 59.5)
})
test('depreciation uses the net acquisition amount when input VAT is selected', () => {
  assert.equal(getStatementAllocationDepreciationAmount(allocation(-1428, '9', {
    bookingMode: 'depreciation_single', depreciationMonths: 12, depreciationStartDate: '2026-01-01',
  }), '2026-01-01', '2026-01-31'), 100)
})