import test from 'node:test'
import assert from 'node:assert/strict'
import {
  unitRate,
  isValidQuantity,
  isValidPrice,
  lineAmount,
  baseUnitPrice,
} from '../src/utils/transaction.js'

test('source-unit pricing converts exactly once', () => {
  const row = {
    source_unit: 7,
    units: [{ unit_id: 7, rate: 24 }],
    quantity: 2,
    unit_price: 120,
  }

  assert.equal(unitRate(row), 24)
  assert.equal(lineAmount(row), 240)
  assert.equal(baseUnitPrice(row), 5)
})

test('base-unit rows keep their entered amount', () => {
  const row = { source_unit: null, quantity: 3, unit_price: 12.5, units: [] }

  assert.equal(unitRate(row), 1)
  assert.equal(lineAmount(row), 37.5)
  assert.equal(baseUnitPrice(row), 12.5)
})

test('quantity and price validators reject non-finite or out-of-range values', () => {
  assert.equal(isValidQuantity({ quantity: 0.001 }), true)
  assert.equal(isValidQuantity({ quantity: 0 }), false)
  assert.equal(isValidQuantity({ quantity: Number.NaN }), false)
  assert.equal(isValidQuantity({ quantity: 1e9 + 1 }), false)

  assert.equal(isValidPrice({ unit_price: 0.01 }), true)
  assert.equal(isValidPrice({ unit_price: 0 }), false)
  assert.equal(isValidPrice({ unit_price: Number.POSITIVE_INFINITY }), false)
  assert.equal(isValidPrice({ unit_price: 1e9 + 1 }), false)
})