import { describe, expect, test } from 'vitest'

import * as Economics from './Economics.js'

describe('differenceBps', () => {
  test('normalizes decimals and preserves rebates', () => {
    expect(
      Economics.differenceBps({
        reference: { baseUnits: '1000000', currency: 'USD', decimals: 6 },
        value: { baseUnits: '990000000000000000', currency: 'USD', decimals: 18 },
      }),
    ).toBe(100)
    expect(
      Economics.differenceBps({
        reference: { baseUnits: '1000000', currency: 'USD', decimals: 6 },
        value: { baseUnits: '1001000', currency: 'USD', decimals: 6 },
      }),
    ).toBe(-10)
  })

  test('omits incomparable denominations', () => {
    expect(
      Economics.differenceBps({
        reference: { baseUnits: '1000000', currency: 'USD', decimals: 6 },
        value: { baseUnits: '1000000', currency: 'EUR', decimals: 6 },
      }),
    ).toBeUndefined()
  })
})

describe('usd', () => {
  test('converts USD base units', () => {
    expect(Economics.usd({ baseUnits: '20705', currency: 'USD', decimals: 6 })).toBe(0.020705)
    expect(Economics.usd({ baseUnits: '20705', currency: 'EUR', decimals: 6 })).toBeUndefined()
  })
})

describe('units', () => {
  test('converts base units without assuming a currency', () => {
    expect(Economics.units({ baseUnits: '20705', currency: 'ETH', decimals: 6 })).toBe(0.020705)
  })
})