import assert from 'node:assert/strict'
import { readFileSync } from 'node:fs'
import test from 'node:test'
import { parse } from '@vue/compiler-sfc'
import ts from 'typescript'
import { effectScope, nextTick, reactive, ref, watch } from 'vue'

const source = parse(
  readFileSync(new URL('../src/views/m/pl/plan/PlanDateField.vue', import.meta.url), 'utf8')
).descriptor.scriptSetup!.content

function harness() {
  const props = reactive({
    modelValue: '2026-10-24',
    label: '计划日期',
    clearable: true,
    required: false,
    readonly: false,
    disabled: false
  })
  const events: any[] = []
  const scope = effectScope()
  const bindings = {
    ref,
    watch,
    defineProps: () => props,
    defineEmits:
      () =>
      (...args: any[]) =>
        events.push(args)
  }
  const field = scope.run(() =>
    new Function(
      ...Object.keys(bindings),
      ts.transpile(source, { target: ts.ScriptTarget.ESNext }) +
        ';return {open,selected,openPicker,confirm,clear}'
    )(...Object.values(bindings))
  )
  return { props, events, field, scope }
}

test('Vant date field prefills saved date and only emits confirmed selection', () => {
  const h = harness()
  try {
    h.field.openPicker()
    assert.deepEqual(h.field.selected.value, ['2026', '10', '24'])
    h.field.selected.value = ['2026', '10', '25']
    h.field.open.value = false
    h.field.confirm({ selectedValues: ['2026', '10', '25'] })
    assert.deepEqual(h.events, [])
    h.field.openPicker()
    h.field.confirm({ selectedValues: ['2026', '10', '26'] })
    assert.deepEqual(h.events, [['update:modelValue', '2026-10-26']])
    assert.equal(h.field.open.value, false)
  } finally {
    h.scope.stop()
  }
})

test('readonly and disabled dates cannot open; external changes invalidate pending selection', async () => {
  const h = harness()
  try {
    h.props.readonly = true
    h.field.openPicker()
    assert.equal(h.field.open.value, false)
    h.props.readonly = false
    h.props.disabled = true
    h.field.openPicker()
    assert.equal(h.field.open.value, false)
    h.props.disabled = false
    await nextTick()
    h.field.openPicker()
    h.props.modelValue = '2026-11-01'
    await nextTick()
    assert.equal(h.field.open.value, false)
    h.field.confirm({ selectedValues: ['2026', '10', '26'] })
    assert.deepEqual(h.events, [])
    h.field.openPicker()
    assert.deepEqual(h.field.selected.value, ['2026', '11', '01'])
  } finally {
    h.scope.stop()
  }
})

test('date can only be cleared from an open optional editable picker', () => {
  const h = harness()
  try {
    h.field.clear()
    assert.deepEqual(h.events, [])
    for (const key of ['readonly', 'disabled', 'required'] as const) {
      h.field.open.value = true
      h.props[key] = true
      h.field.clear()
      assert.deepEqual(h.events, [])
      h.props[key] = false
    }
    h.props.clearable = false
    h.field.clear()
    assert.deepEqual(h.events, [])
    h.props.clearable = true
    h.field.openPicker()
    h.field.clear()
    assert.deepEqual(h.events, [['update:modelValue', '']])
    assert.equal(h.field.open.value, false)
  } finally {
    h.scope.stop()
  }
})