import {describe, expect, it} from 'vitest'
import {mount} from '@vue/test-utils'
import {nextTick} from 'vue'
import Accordion from './Accordion.vue'
import AccordionItem from './AccordionItem.vue'

const TWO_ITEMS = `
  <MalioAccordionItem title="Prix" value="prix"><p>Contenu prix</p></MalioAccordionItem>
  <MalioAccordionItem title="Catégorie" value="cat"><p>Contenu catégorie</p></MalioAccordionItem>
`

function mountAccordion(props: Record<string, unknown> = {}, slot: string = TWO_ITEMS, attachTo?: HTMLElement) {
  return mount(Accordion, {
    props,
    slots: {default: slot},
    attachTo,
    global: {components: {MalioAccordionItem: AccordionItem}},
  })
}

describe('MalioAccordion — rendu & mode multiple', () => {
  it('renders each item header with its title', () => {
    const wrapper = mountAccordion()
    const headers = wrapper.findAll('button[aria-expanded]')
    expect(headers).toHaveLength(2)
    expect(headers[0].text()).toContain('Prix')
    expect(headers[1].text()).toContain('Catégorie')
  })

  it('renders the slot content of each panel', () => {
    const wrapper = mountAccordion()
    expect(wrapper.html()).toContain('Contenu prix')
    expect(wrapper.html()).toContain('Contenu catégorie')
  })

  it('all panels are collapsed by default', () => {
    const wrapper = mountAccordion()
    const headers = wrapper.findAll('button[aria-expanded]')
    expect(headers[0].attributes('aria-expanded')).toBe('false')
    expect(headers[1].attributes('aria-expanded')).toBe('false')
    const regions = wrapper.findAll('[role="region"]')
    expect(regions[0].classes()).toContain('grid-rows-[0fr]')
  })

  it('opens a panel on header click (multiple mode is default)', async () => {
    const wrapper = mountAccordion()
    const headers = wrapper.findAll('button[aria-expanded]')
    await headers[0].trigger('click')
    expect(headers[0].attributes('aria-expanded')).toBe('true')
    const regions = wrapper.findAll('[role="region"]')
    expect(regions[0].classes()).toContain('grid-rows-[1fr]')
  })

  it('keeps multiple panels open simultaneously in multiple mode', async () => {
    const wrapper = mountAccordion()
    const headers = wrapper.findAll('button[aria-expanded]')
    await headers[0].trigger('click')
    await headers[1].trigger('click')
    expect(headers[0].attributes('aria-expanded')).toBe('true')
    expect(headers[1].attributes('aria-expanded')).toBe('true')
  })

  it('closes an open panel when its header is clicked again', async () => {
    const wrapper = mountAccordion()
    const headers = wrapper.findAll('button[aria-expanded]')
    await headers[0].trigger('click')
    await headers[0].trigger('click')
    expect(headers[0].attributes('aria-expanded')).toBe('false')
  })

  it('wires aria-controls / aria-labelledby / role=region correctly', () => {
    const wrapper = mountAccordion({id: 'acc'})
    const headers = wrapper.findAll('button[aria-expanded]')
    const regions = wrapper.findAll('[role="region"]')
    expect(headers[0].attributes('id')).toBe('acc-header-prix')
    expect(headers[0].attributes('aria-controls')).toBe('acc-panel-prix')
    expect(regions[0].attributes('id')).toBe('acc-panel-prix')
    expect(regions[0].attributes('aria-labelledby')).toBe('acc-header-prix')
  })

  it('emits update:modelValue with an array in multiple mode', async () => {
    const wrapper = mountAccordion()
    const headers = wrapper.findAll('button[aria-expanded]')
    await headers[0].trigger('click')
    expect(wrapper.emitted('update:modelValue')?.[0]).toEqual([['prix']])
    await nextTick()
  })
})

describe('MalioAccordion — mode single & contrôlé', () => {
  it('opening a panel closes the others in single mode', async () => {
    const wrapper = mountAccordion({mode: 'single'})
    const headers = wrapper.findAll('button[aria-expanded]')
    await headers[0].trigger('click')
    await headers[1].trigger('click')
    expect(headers[0].attributes('aria-expanded')).toBe('false')
    expect(headers[1].attributes('aria-expanded')).toBe('true')
  })

  it('emits a string in single mode', async () => {
    const wrapper = mountAccordion({mode: 'single'})
    const headers = wrapper.findAll('button[aria-expanded]')
    await headers[1].trigger('click')
    expect(wrapper.emitted('update:modelValue')?.[0]).toEqual(['cat'])
  })

  it('emits empty string when closing the open panel in single mode', async () => {
    const wrapper = mountAccordion({mode: 'single', modelValue: 'prix'})
    const headers = wrapper.findAll('button[aria-expanded]')
    await headers[0].trigger('click')
    expect(wrapper.emitted('update:modelValue')?.[0]).toEqual([''])
  })

  it('respects modelValue array in controlled multiple mode', () => {
    const wrapper = mountAccordion({modelValue: ['cat']})
    const headers = wrapper.findAll('button[aria-expanded]')
    expect(headers[0].attributes('aria-expanded')).toBe('false')
    expect(headers[1].attributes('aria-expanded')).toBe('true')
  })

  it('respects modelValue string in controlled single mode', () => {
    const wrapper = mountAccordion({mode: 'single', modelValue: 'prix'})
    const headers = wrapper.findAll('button[aria-expanded]')
    expect(headers[0].attributes('aria-expanded')).toBe('true')
    expect(headers[1].attributes('aria-expanded')).toBe('false')
  })

  it('does not mutate local state in controlled mode (emits only)', async () => {
    const wrapper = mountAccordion({modelValue: []})
    const headers = wrapper.findAll('button[aria-expanded]')
    await headers[0].trigger('click')
    // état piloté par le parent : sans mise à jour de la prop, reste fermé
    expect(headers[0].attributes('aria-expanded')).toBe('false')
    expect(wrapper.emitted('update:modelValue')?.[0]).toEqual([['prix']])
  })
})

describe('MalioAccordion — defaultOpen, disabled & clavier', () => {
  const WITH_DEFAULT_OPEN = `
    <MalioAccordionItem title="Prix" value="prix"><p>P</p></MalioAccordionItem>
    <MalioAccordionItem title="Catégorie" value="cat" :default-open="true"><p>C</p></MalioAccordionItem>
  `
  const WITH_DISABLED = `
    <MalioAccordionItem title="Prix" value="prix"><p>P</p></MalioAccordionItem>
    <MalioAccordionItem title="Catégorie" value="cat" :disabled="true"><p>C</p></MalioAccordionItem>
  `

  it('opens defaultOpen items initially in uncontrolled mode', async () => {
    const wrapper = mountAccordion({}, WITH_DEFAULT_OPEN)
    await nextTick()
    const headers = wrapper.findAll('button[aria-expanded]')
    expect(headers[0].attributes('aria-expanded')).toBe('false')
    expect(headers[1].attributes('aria-expanded')).toBe('true')
  })

  it('sets disabled and aria-disabled on a disabled item', () => {
    const wrapper = mountAccordion({}, WITH_DISABLED)
    const headers = wrapper.findAll('button[aria-expanded]')
    expect(headers[1].attributes('disabled')).toBeDefined()
    expect(headers[1].attributes('aria-disabled')).toBe('true')
  })

  it('does not toggle a disabled item on click', async () => {
    const wrapper = mountAccordion({}, WITH_DISABLED)
    const headers = wrapper.findAll('button[aria-expanded]')
    await headers[1].trigger('click')
    expect(headers[1].attributes('aria-expanded')).toBe('false')
    expect(wrapper.emitted('update:modelValue')).toBeUndefined()
  })

  it('moves focus to the next header on ArrowDown', async () => {
    const root = document.createElement('div')
    document.body.appendChild(root)
    const wrapper = mountAccordion({}, TWO_ITEMS, root)
    const headers = wrapper.findAll('button[aria-expanded]')
    ;(headers[0].element as HTMLElement).focus()
    await headers[0].trigger('keydown', {key: 'ArrowDown'})
    expect(document.activeElement).toBe(headers[1].element)
    wrapper.unmount()
    root.remove()
  })

  it('wraps focus to the first header on ArrowDown from the last', async () => {
    const root = document.createElement('div')
    document.body.appendChild(root)
    const wrapper = mountAccordion({}, TWO_ITEMS, root)
    const headers = wrapper.findAll('button[aria-expanded]')
    ;(headers[1].element as HTMLElement).focus()
    await headers[1].trigger('keydown', {key: 'ArrowDown'})
    expect(document.activeElement).toBe(headers[0].element)
    wrapper.unmount()
    root.remove()
  })

  it('moves focus to the previous header on ArrowUp', async () => {
    const root = document.createElement('div')
    document.body.appendChild(root)
    const wrapper = mountAccordion({}, TWO_ITEMS, root)
    const headers = wrapper.findAll('button[aria-expanded]')
    ;(headers[1].element as HTMLElement).focus()
    await headers[1].trigger('keydown', {key: 'ArrowUp'})
    expect(document.activeElement).toBe(headers[0].element)
    wrapper.unmount()
    root.remove()
  })

  it('skips disabled headers during keyboard navigation', async () => {
    const root = document.createElement('div')
    document.body.appendChild(root)
    const slot = `
      <MalioAccordionItem title="A" value="a"><p>A</p></MalioAccordionItem>
      <MalioAccordionItem title="B" value="b" :disabled="true"><p>B</p></MalioAccordionItem>
      <MalioAccordionItem title="C" value="c"><p>C</p></MalioAccordionItem>
    `
    const wrapper = mountAccordion({}, slot, root)
    const headers = wrapper.findAll('button[aria-expanded]')
    ;(headers[0].element as HTMLElement).focus()
    await headers[0].trigger('keydown', {key: 'ArrowDown'})
    // saute le header désactivé (B) pour aller directement à C
    expect(document.activeElement).toBe(headers[2].element)
    wrapper.unmount()
    root.remove()
  })
})

describe('MalioAccordion — overflow du panneau (popovers enfants)', () => {
  const ONE = `<MalioAccordionItem title="A" value="a"><p>contenu</p></MalioAccordionItem>`
  const ONE_OPEN = `<MalioAccordionItem title="A" value="a" :default-open="true"><p>contenu</p></MalioAccordionItem>`

  it('clips the panel (overflow-hidden) while collapsed', () => {
    const wrapper = mountAccordion({}, ONE)
    const inner = wrapper.find('[role="region"] > div')
    expect(inner.classes()).toContain('overflow-hidden')
    expect(inner.classes()).not.toContain('overflow-visible')
  })

  it('lets the panel overflow once open at mount (defaultOpen)', async () => {
    const wrapper = mountAccordion({}, ONE_OPEN)
    await nextTick()
    expect(wrapper.find('[role="region"] > div').classes()).toContain('overflow-visible')
  })

  it('switches to overflow-visible after the open transition ends', async () => {
    const wrapper = mountAccordion({}, ONE)
    await wrapper.find('button[aria-expanded]').trigger('click')
    await wrapper.find('[role="region"]').trigger('transitionend', {propertyName: 'grid-template-rows'})
    expect(wrapper.find('[role="region"] > div').classes()).toContain('overflow-visible')
  })

  it('re-clips (overflow-hidden) as soon as it closes', async () => {
    const wrapper = mountAccordion({}, ONE_OPEN)
    await nextTick()
    await wrapper.find('button[aria-expanded]').trigger('click')
    expect(wrapper.find('[role="region"] > div').classes()).toContain('overflow-hidden')
  })
})