import { asyncExpect } from '@/tests/utils'
import { mount } from '@vue/test-utils'
import KeyCode from '../../_util/KeyCode'
import Cascader from '..'
import focusTest from '../../../tests/shared/focusTest'

function $$ (className) {
  return document.body.querySelectorAll(className)
}
const options = [{
  value: 'zhejiang',
  label: 'Zhejiang',
  children: [{
    value: 'hangzhou',
    label: 'Hangzhou',
    children: [{
      value: 'xihu',
      label: 'West Lake',
    }],
  }],
}, {
  value: 'jiangsu',
  label: 'Jiangsu',
  children: [{
    value: 'nanjing',
    label: 'Nanjing',
    children: [{
      value: 'zhonghuamen',
      label: 'Zhong Hua Men',
    }],
  }],
}]

function filter (inputValue, path) {
  return path.some(option => option.label.toLowerCase().indexOf(inputValue.toLowerCase()) > -1)
}

describe('Cascader', () => {
  focusTest(Cascader)

  it('popup correctly when panel is hidden', async () => {
    const wrapper = mount(Cascader, { propsData: { options }, sync: false })
    const CascaderWrapper = mount({
      render () {
        return wrapper.find({ name: 'Trigger' }).vm.getComponent()
      },
    }, { sync: false })
    await asyncExpect(() => {
      expect(CascaderWrapper.html()).toMatchSnapshot()
    })
  })

  it('popup correctly when panel is open', async () => {
    const wrapper = mount(Cascader, { propsData: { options }, sync: false })
    await asyncExpect(() => {
      wrapper.find('input').trigger('click')
    })
    let CascaderWrapper = null
    await asyncExpect(() => {
      CascaderWrapper = mount({
        render () {
          return wrapper.find({ name: 'Trigger' }).vm.getComponent()
        },
      }, { sync: false })
    })
    await asyncExpect(() => {
      expect(CascaderWrapper.html()).toMatchSnapshot()
    })
  })

  it('support controlled mode', async () => {
    const wrapper = mount(Cascader, { propsData: { options }, sync: false })
    await asyncExpect(() => {
      wrapper.setProps({
        value: ['zhejiang', 'hangzhou', 'xihu'],
      })
    })
    await asyncExpect(() => {
      expect(wrapper.html()).toMatchSnapshot()
    })
  })

  it('popup correctly with defaultValue', async () => {
    const wrapper = mount(Cascader, {
      propsData: {
        options,
        defaultValue: ['zhejiang', 'hangzhou'],
      }, sync: false })

    await asyncExpect(() => {
      wrapper.find('input').trigger('click')
    })
    let CascaderWrapper = null
    await asyncExpect(() => {
      CascaderWrapper = mount({
        render () {
          return wrapper.find({ name: 'Trigger' }).vm.getComponent()
        },
      }, { sync: false })
    })

    await asyncExpect(() => {
      expect(CascaderWrapper.html()).toMatchSnapshot()
    })
  })

  it('can be selected', async () => {
    const wrapper = mount(Cascader, { propsData: { options }, sync: false })
    await asyncExpect(() => {
      wrapper.find('input').trigger('click')
    })
    let popupWrapper = null
    await asyncExpect(() => {
      popupWrapper = mount({
        render () {
          return wrapper.find({ name: 'Trigger' }).vm.getComponent()
        },
      }, { sync: false })
    })
    await asyncExpect(() => {
      popupWrapper.findAll('.ant-cascader-menu').at(0).findAll('.ant-cascader-menu-item').at(0)
        .trigger('click')
    })
    await asyncExpect(() => {
      popupWrapper = mount({
        render () {
          return wrapper.find({ name: 'Trigger' }).vm.getComponent()
        },
      }, { sync: false })
    })

    await asyncExpect(() => {
      expect(popupWrapper.html()).toMatchSnapshot()
    })
    await asyncExpect(() => {
      popupWrapper = mount({
        render () {
          return wrapper.find({ name: 'Trigger' }).vm.getComponent()
        },
      }, { sync: false })
    })
    await asyncExpect(() => {
      popupWrapper.findAll('.ant-cascader-menu').at(1).findAll('.ant-cascader-menu-item').at(0)
        .trigger('click')
    })
    await asyncExpect(() => {
      popupWrapper = mount({
        render () {
          return wrapper.find({ name: 'Trigger' }).vm.getComponent()
        },
      }, { sync: false })
    })
    await asyncExpect(() => {
      expect(popupWrapper.html()).toMatchSnapshot()
    })
    await asyncExpect(() => {
      popupWrapper = mount({
        render () {
          return wrapper.find({ name: 'Trigger' }).vm.getComponent()
        },
      }, { sync: false })
    })
    await asyncExpect(() => {
      popupWrapper.findAll('.ant-cascader-menu').at(2).findAll('.ant-cascader-menu-item').at(0)
        .trigger('click')
    })
    await asyncExpect(() => {
      popupWrapper = mount({
        render () {
          return wrapper.find({ name: 'Trigger' }).vm.getComponent()
        },
      }, { sync: false })
    })
    await asyncExpect(() => {
      expect(popupWrapper.html()).toMatchSnapshot()
    })
  })

  it('backspace should work with `Cascader[showSearch]`', async () => {
    const wrapper = mount(Cascader, { propsData: { options, showSearch: true }, sync: false })
    await asyncExpect(() => {
      wrapper.find('input').element.value = '123'
      wrapper.find('input').trigger('input')
    })
    await asyncExpect(() => {
      expect(wrapper.vm.inputValue).toBe('123')
    })
    await asyncExpect(() => {
      wrapper.find('input').element.keyCode = KeyCode.BACKSPACE
      wrapper.find('input').trigger('keydown')
    })
    await asyncExpect(() => {
      // trigger onKeyDown will not trigger onChange by default, so the value is still '123'
      expect(wrapper.vm.inputValue).toBe('123')
    })
  })

  describe('limit filtered item count', () => {
    beforeEach(() => {
      document.body.outerHTML = ''
    })

    afterEach(() => {
      document.body.outerHTML = ''
    })

    it('limit with positive number', async () => {
      const wrapper = mount(Cascader, {
        propsData: { options, showSearch: { filter, limit: 1 }},
        sync: false,
        attachToDocument: true,
      })
      wrapper.find('input').trigger('click')
      wrapper.find('input').element.value = 'a'
      wrapper.find('input').trigger('input')
      await asyncExpect(() => {
        expect($$('.ant-cascader-menu-item').length).toBe(1)
      }, 0)
    })

    it('not limit', async () => {
      const wrapper = mount(Cascader, {
        propsData: { options, showSearch: { filter, limit: false }},
        sync: false,
        attachToDocument: true,
      })
      wrapper.find('input').trigger('click')
      wrapper.find('input').element.value = 'a'
      wrapper.find('input').trigger('input')
      await asyncExpect(() => {
        expect($$('.ant-cascader-menu-item').length).toBe(2)
      }, 0)
    })

    it('negative limit', async () => {
      const errorSpy = jest.spyOn(console, 'error').mockImplementation(() => {})
      const wrapper = mount(Cascader, {
        propsData: { options, showSearch: { filter, limit: -1 }},
        sync: false,
        attachToDocument: true,
      })
      wrapper.find('input').trigger('click')
      wrapper.find('input').element.value = 'a'
      wrapper.find('input').trigger('input')
      await asyncExpect(() => {
        expect($$('.ant-cascader-menu-item').length).toBe(2)
      }, 0)
      expect(errorSpy).toBeCalledWith(
        "Warning: 'limit' of showSearch in Cascader should be positive number or false.",
      )
    })
  })
})