import { describe, expect, it } from "vitest"

import { CurrencyEnum } from "@scandic-hotels/common/constants/currency"

import { calculateVat, sumPackages, sumPackagesRequestedPrice } from "./index"

describe("sumPackages", () => {
  it("returns 0 price for null packages", () => {
    const result = sumPackages(null)
    expect(result).toEqual({ currency: undefined, price: 0 })
  })

  it("returns 0 price for undefined packages", () => {
    const result = sumPackages(undefined)
    expect(result).toEqual({ currency: undefined, price: 0 })
  })

  it("returns 0 price for empty packages", () => {
    const result = sumPackages([])
    expect(result).toEqual({ currency: undefined, price: 0 })
  })

  it("sums prices of packages", () => {
    const result = sumPackages([
      { localPrice: { totalPrice: 100, currency: CurrencyEnum.SEK } },
      { localPrice: { totalPrice: 200, currency: CurrencyEnum.SEK } },
      { localPrice: { totalPrice: 50, currency: CurrencyEnum.SEK } },
    ])
    expect(result).toEqual({ currency: CurrencyEnum.SEK, price: 350 })
  })
})

describe("sumPackagesRequestedPrice", () => {
  it("returns 0 price for null packages", () => {
    const result = sumPackagesRequestedPrice(null)
    expect(result).toEqual({ currency: undefined, price: 0 })
  })

  it("returns 0 price for undefined packages", () => {
    const result = sumPackagesRequestedPrice(undefined)
    expect(result).toEqual({ currency: undefined, price: 0 })
  })

  it("returns 0 price for empty packages", () => {
    const result = sumPackagesRequestedPrice([])
    expect(result).toEqual({ currency: undefined, price: 0 })
  })

  it("sums prices of packages", () => {
    const result = sumPackagesRequestedPrice([
      { requestedPrice: { totalPrice: 100, currency: CurrencyEnum.SEK } },
      { requestedPrice: { totalPrice: 200, currency: CurrencyEnum.SEK } },
      { requestedPrice: { totalPrice: 50, currency: CurrencyEnum.SEK } },
    ])
    expect(result).toEqual({ currency: CurrencyEnum.SEK, price: 350 })
  })
})

describe("calculateVat", () => {
  it("calculates VAT correctly", () => {
    expect(calculateVat(100, 25)).toEqual({
      priceExclVat: 80,
      vatAmount: 20,
    })
    expect(calculateVat(5, 100)).toEqual({
      priceExclVat: 2.5,
      vatAmount: 2.5,
    })
  })
})