/**
 * Tests for cfc-frontend utils/bundle-pricing.js
 *
 * 验证套餐优惠的纯函数语义：未命中/未激活 → 0；active=true + discount>0 才生效。
 */
const {
  bundleDiscountOf,
  formatBundleLines,
  applyBundleDiscount
} = require('@/utils/bundle-pricing')

describe('bundleDiscountOf', () => {
  it('null/undefined → 0', () => {
    expect(bundleDiscountOf(null)).toBe(0)
    expect(bundleDiscountOf(undefined)).toBe(0)
  })
  it('active 非 true → 0', () => {
    expect(bundleDiscountOf({ active: false, discount: 11800 })).toBe(0)
    expect(bundleDiscountOf({ active: true, discount: 11800 })).not.toBe(0)
    expect(bundleDiscountOf({})).toBe(0)
  })
  it('active=true + 正折扣 → 折扣值', () => {
    expect(bundleDiscountOf({ active: true, discount: 11800 })).toBe(11800)
  })
  it('active=true + 非正折扣 → 0', () => {
    expect(bundleDiscountOf({ active: true, discount: 0 })).toBe(0)
    expect(bundleDiscountOf({ active: true, discount: -1 })).toBe(0)
  })
})

describe('formatBundleLines', () => {
  it('null/空数组 → []', () => {
    expect(formatBundleLines(null)).toEqual([])
    expect(formatBundleLines([])).toEqual([])
  })
  it('过滤无 bundleName 的行', () => {
    const rows = formatBundleLines([
      { bundleName: '套餐一', times: 1, saving: 11800 },
      { times: 2 }
    ])
    expect(rows).toHaveLength(1)
    expect(rows[0].name).toBe('套餐一')
  })
  it('补齐默认 times/saving', () => {
    const rows = formatBundleLines([{ bundleName: '套餐一' }])
    expect(rows[0].times).toBe(1)
    expect(rows[0].saving).toBe(0)
  })
})

describe('applyBundleDiscount', () => {
  it('未命中 → 原总价', () => {
    expect(applyBundleDiscount(139800, null)).toBe(139800)
  })
  it('命中 → 扣减套餐优惠', () => {
    expect(applyBundleDiscount(139800, { active: true, discount: 11800 })).toBe(128000)
  })
})