/* eslint-env jest */
import Vue from 'vue'
import ElementUI from 'element-ui'
import path from 'path'
import { load } from '@/ui-refactor/views/purchase/__tests__/loadComponent'

jest.mock('@/utils/usersInfo', () => ({}))
Vue.use(ElementUI)
const PaymentMethods = load(path.resolve('src/ui-refactor/components/PaymentMethods.vue'))
const options = Object.freeze([
  Object.freeze({ label: 'pay_stack', name: 'Paystack' }),
  Object.freeze({ label: 'cash', name: 'Ecoin' }),
  Object.freeze({ label: 'prp', name: 'PRP' }),
  Object.freeze({ label: 'other', name: 'Other returned method' })
])
const instances = []

function mount(overrides = {}) {
  const changed = jest.fn()
  const vm = new Vue({
    data: () => ({
      options, selection: 'pay_stack', disabled: false, formDisabled: false,
      balances: { cash: 43, prp: 0 },
      summary: Object.freeze({ amount: 90000, balance: 43, remaining: 0, insufficient: true }),
      ...overrides
    }),
    render(h) {
      return h('el-form', { props: { disabled: this.formDisabled }}, [h(PaymentMethods, {
        props: { options: this.options, value: this.selection, currency: 'NGN', balances: this.balances, summary: this.summary, disabled: this.disabled },
        on: { input: value => { this.selection = value; changed(value) } }
      })])
    }
  }).$mount()
  instances.push(vm)
  return { vm, changed }
}

afterEach(() => instances.splice(0).forEach(vm => vm.$destroy()))
const inputs = vm => Array.from(vm.$el.querySelectorAll('input[type="radio"]'))

it.each([options, Object.fromEntries(options.map(option => [option.label, option]))])('preserves returned option order and emits the original selected label once', async returned => {
  const { vm, changed } = mount({ options: returned })
  expect(inputs(vm).map(input => input.value)).toEqual(options.map(option => option.label))
  expect(changed).not.toHaveBeenCalled()
  inputs(vm).find(input => input.value === 'cash').click()
  await Vue.nextTick()
  expect(vm.selection).toBe('cash')
  expect(changed).toHaveBeenCalledTimes(1)
  expect(changed).toHaveBeenCalledWith('cash')
  expect(vm.summary.amount).toBe(90000)
  expect(vm.balances.cash).toBe(43)
  expect(vm.$el.textContent).toContain('not enough to cover this order')
})

it('displays parent-provided totals, remaining balance and warning state without recalculating them', () => {
  const { vm } = mount({ selection: 'cash', summary: Object.freeze({ amount: 90000, balance: 43, remaining: 123, insufficient: false }) })
  expect(Array.from(vm.$el.querySelectorAll('.el-descriptions-item__content'), node => node.textContent.trim())).toEqual(['NGN 43', 'NGN 90,000', 'NGN 123'])
  expect(vm.$el.querySelector('[role="alert"]')).toBeNull()
})

it('supports a single returned option and distinguishes zero from missing amounts', () => {
  const { vm } = mount({ selection: 'cash', options: [options[1]], balances: { cash: 0 }, summary: { amount: 0, balance: 0, remaining: null, insufficient: false }})
  expect(inputs(vm)).toHaveLength(1)
  expect(vm.$el.textContent).not.toContain('Paystack')
  expect(Array.from(vm.$el.querySelectorAll('.el-descriptions-item__content'), node => node.textContent.trim())).toEqual(['NGN 0', 'NGN 0', '—'])
})

it('does not choose another method when the selected option is absent', async() => {
  const { vm, changed } = mount({ options: [options[1]] })
  await Vue.nextTick()
  expect(vm.$el.querySelector('.ng-payment-methods-detail')).toBeNull()
  expect(vm.selection).toBe('pay_stack')
  expect(changed).not.toHaveBeenCalled()
})

it.each(['disabled', 'formDisabled'])('keeps selection locked when %s is true', async field => {
  const { vm, changed } = mount({ [field]: true })
  expect(inputs(vm).every(input => input.disabled)).toBe(true)
  inputs(vm).find(input => input.value === 'cash').click()
  await Vue.nextTick()
  expect(vm.selection).toBe('pay_stack')
  expect(changed).not.toHaveBeenCalled()
})