import { computed, defineComponent } from 'vue'
import { shallowMount } from '@vue/test-utils'
import { beforeEach, describe, expect, it } from 'vitest'
import DataTable, { createPaginationItems, normalizePage, normalizePageSizes, type DataTableColumn } from './DataTable.vue'
import LayoutPreferenceList from './LayoutPreferenceList.vue'
import { UI_PREFERENCE_SCOPE, preferenceStorageKey } from '@/shared/utils/uiLayoutPreference'

const TableStub = defineComponent({ template: '<div><slot /></div>', methods: { doLayout() {} } })
const ColumnStub = defineComponent({
  inheritAttrs: false,
  props: { label: String },
  template: '<div class="column-stub" :data-label="label"><slot /></div>',
})
const ButtonStub = defineComponent({ template: '<button type="button"><slot /></button>' })
const PopoverStub = defineComponent({ template: '<div><slot name="reference" /><slot /></div>' })

const configurableColumns: DataTableColumn[] = [
  { key: 'actions', label: '操作', fixed: 'left' },
  { key: 'name', prop: 'name', label: '名称' },
  { key: 'status', prop: 'status', label: '状态' },
]

function mountTable() {
  return shallowMount(DataTable, {
    props: { data: [], columns: configurableColumns, preferenceKey: 'orders-table' },
    global: {
      provide: { [UI_PREFERENCE_SCOPE as symbol]: computed(() => 'user-1') },
      stubs: {
        ElTable: TableStub,
        ElTableColumn: ColumnStub,
        ElButton: ButtonStub,
        ElPopover: PopoverStub,
      },
      directives: { loading: {} },
    },
  })
}

describe('DataTable pagination helpers', () => {
  it('normalizes page-size options', () => {
    expect(normalizePageSizes([20, 10, 20, 0, -1, 0.8, 10.8])).toEqual([20, 10])
    expect(normalizePageSizes([])).toEqual([10])
  })

  it('keeps the page inside the available range', () => {
    expect(normalizePage(0, 8)).toBe(1)
    expect(normalizePage(12, 8)).toBe(8)
    expect(normalizePage(3.8, 8)).toBe(3)
    expect(normalizePage(Number.NaN, 8)).toBe(1)
    expect(normalizePage(4, 0)).toBe(1)
    expect(normalizePage(4, Number.NaN)).toBe(1)
  })

  it('does not create page buttons for an empty result', () => {
    expect(createPaginationItems(1, 0)).toEqual([])
  })

  it('shows all pages for a short result set', () => {
    expect(createPaginationItems(3, 5)).toEqual([1, 2, 3, 4, 5])
  })

  it('keeps first and last pages visible for long result sets', () => {
    expect(createPaginationItems(1, 30)).toEqual([1, 2, 3, 4, 5, 'ellipsis-end', 30])
    expect(createPaginationItems(15, 30)).toEqual([1, 'ellipsis-start', 14, 15, 16, 'ellipsis-end', 30])
    expect(createPaginationItems(30, 30)).toEqual([1, 'ellipsis-start', 26, 27, 28, 29, 30])
  })
})

describe('DataTable column preferences', () => {
  beforeEach(() => localStorage.clear())

  it('restores column order and visibility while locking the actions column', async () => {
    localStorage.setItem(preferenceStorageKey('table', 'user-1', 'orders-table'), JSON.stringify({
      version: 1,
      order: ['status', 'name', 'actions'],
      hidden: ['name', 'actions'],
    }))
    const wrapper = mountTable()
    expect(wrapper.findAll('.column-stub').map((column) => column.attributes('data-label'))).toEqual(['操作', '状态'])

    const settings = wrapper.findComponent(LayoutPreferenceList)
    const items = settings.props('items') as Array<{ key: string; movable: boolean; hideable: boolean }>
    expect(items.find((item) => item.key === 'actions')).toMatchObject({ movable: false, hideable: false })

    settings.vm.$emit('visibility', 'name', true)
    settings.vm.$emit('move', 'name', 0)
    await wrapper.vm.$nextTick()
    expect(wrapper.findAll('.column-stub').map((column) => column.attributes('data-label'))).toEqual(['操作', '名称', '状态'])
  })

  it('keeps business actions, column settings, and trailing controls in one toolbar', () => {
    const wrapper = shallowMount(DataTable, {
      props: { data: [], columns: configurableColumns, preferenceKey: 'orders-table' },
      slots: {
        'toolbar-start': '<h2>订单列表</h2>',
        'toolbar-actions': '<button>新增订单</button>',
        'toolbar-end': '<button>辅助操作</button>',
      },
      global: {
        provide: { [UI_PREFERENCE_SCOPE as symbol]: computed(() => 'user-1') },
        stubs: {
          ElTable: TableStub,
          ElTableColumn: ColumnStub,
          ElButton: ButtonStub,
          ElPopover: PopoverStub,
        },
        directives: { loading: {} },
      },
    })

    expect(wrapper.findAll('.data-table__toolbar')).toHaveLength(1)
    expect(wrapper.get('.data-table__toolbar').classes()).not.toContain('is-compact')
    expect(wrapper.get('.data-table__toolbar-start').text()).toBe('订单列表')
    expect(wrapper.get('.data-table__toolbar-actions').text()).toContain('新增订单')
    expect(wrapper.get('.data-table__toolbar-actions').text()).toContain('辅助操作')
    expect(wrapper.get('.data-table__business-actions').text()).toBe('新增订单')
    expect(wrapper.get('.data-table__utility-actions').text()).toContain('辅助操作')
    expect(wrapper.get('.data-table__toolbar-end').text()).toBe('辅助操作')
  })

  it('uses a compact right-aligned toolbar when no leading content is provided', () => {
    const wrapper = shallowMount(DataTable, {
      props: { data: [], columns: configurableColumns, preferenceKey: 'orders-table' },
      slots: { 'toolbar-actions': '<button>新增订单</button>' },
      global: {
        provide: { [UI_PREFERENCE_SCOPE as symbol]: computed(() => 'user-1') },
        stubs: {
          ElTable: TableStub,
          ElTableColumn: ColumnStub,
          ElButton: ButtonStub,
          ElPopover: PopoverStub,
        },
        directives: { loading: {} },
      },
    })

    expect(wrapper.get('.data-table__toolbar').classes()).toContain('is-compact')
    expect(wrapper.find('.data-table__toolbar-start').exists()).toBe(false)
    expect(wrapper.get('.data-table__toolbar-actions').classes()).toContain('has-business-actions')
    expect(wrapper.get('.data-table__business-actions').text()).toBe('新增订单')
  })

  it('keeps business actions in a separate mobile-wrappable group from column settings', () => {
    const wrapper = shallowMount(DataTable, {
      props: { data: [], columns: configurableColumns, preferenceKey: 'orders-table' },
      slots: { 'toolbar-actions': '<button class="create-action">新增快递公司</button>' },
      global: {
        provide: { [UI_PREFERENCE_SCOPE as symbol]: computed(() => 'user-1') },
        stubs: {
          ElTable: TableStub,
          ElTableColumn: ColumnStub,
          ElButton: ButtonStub,
          ElPopover: PopoverStub,
        },
        directives: { loading: {} },
      },
    })
    const toolbarActions = wrapper.get('.data-table__toolbar-actions')
    const businessActions = toolbarActions.get('.data-table__business-actions')

    expect(toolbarActions.classes()).toContain('has-business-actions')
    expect(businessActions.get('.create-action').text()).toBe('新增快递公司')
    expect(toolbarActions.find('.data-table__utility-actions').exists()).toBe(true)
    expect(toolbarActions.find('button[aria-label="列设置"]').exists()).toBe(true)
  })
})