import {describe, expect, it} from 'vitest'
import {mount} from '@vue/test-utils'
import type {DefineComponent} from 'vue'
import {Icon as IconifyIcon} from '@iconify/vue'
import TabList from './TabList.vue'

type Tab = {
  key: string
  label: string
  icon?: string
  disabled?: boolean
}

type TabListProps = {
  tabs: Tab[]
  modelValue?: string
  id?: string
  maxVisibleTabs?: number
  maxWidth?: number
}

const TabListForTest = TabList as DefineComponent<TabListProps>

const tabs: Tab[] = [
  {key: 'home', label: 'Accueil', icon: 'mdi:home'},
  {key: 'settings', label: 'Paramètres'},
  {key: 'profile', label: 'Profil', icon: 'mdi:account'},
]

function mountComponent(props: TabListProps, slots?: Record<string, string>) {
  return mount(TabListForTest, {
    props,
    slots,
  })
}

describe('MalioTabList', () => {
  it('renders all tab buttons with correct labels', () => {
    const wrapper = mountComponent({tabs})
    const buttons = wrapper.findAll('[role="tab"]')
    expect(buttons).toHaveLength(3)
    expect(buttons[0].text()).toContain('Accueil')
    expect(buttons[1].text()).toContain('Paramètres')
    expect(buttons[2].text()).toContain('Profil')
  })

  it('renders icons for tabs that have one', () => {
    const wrapper = mountComponent({tabs})
    const buttons = wrapper.findAll('[role="tab"]')
    expect(buttons[0].find('svg').exists()).toBe(true)
    expect(buttons[2].find('svg').exists()).toBe(true)
  })

  it('does not render icon when tab has no icon', () => {
    const wrapper = mountComponent({tabs})
    const buttons = wrapper.findAll('[role="tab"]')
    expect(buttons[1].find('svg').exists()).toBe(false)
  })

  it('first tab is active by default in uncontrolled mode', () => {
    const wrapper = mountComponent({tabs})
    const buttons = wrapper.findAll('[role="tab"]')
    expect(buttons[0].attributes('aria-selected')).toBe('true')
    expect(buttons[1].attributes('aria-selected')).toBe('false')
    expect(buttons[2].attributes('aria-selected')).toBe('false')
  })

  it('shows the panel content for the active tab (v-show)', () => {
    const wrapper = mountComponent({tabs}, {
      home: '<p>Home content</p>',
      settings: '<p>Settings content</p>',
      profile: '<p>Profile content</p>',
    })
    const panels = wrapper.findAll('[role="tabpanel"]')
    expect(panels[0].attributes('style')).toBeUndefined()
    expect(panels[1].attributes('style')).toContain('display: none')
    expect(panels[2].attributes('style')).toContain('display: none')
  })

  it('switches tab on click in uncontrolled mode', async () => {
    const wrapper = mountComponent({tabs})
    const buttons = wrapper.findAll('[role="tab"]')

    await buttons[1].trigger('click')

    expect(buttons[1].attributes('aria-selected')).toBe('true')
    expect(buttons[0].attributes('aria-selected')).toBe('false')
  })

  it('emits update:modelValue on click in controlled mode', async () => {
    const wrapper = mountComponent({tabs, modelValue: 'home'})
    const buttons = wrapper.findAll('[role="tab"]')

    await buttons[2].trigger('click')

    expect(wrapper.emitted('update:modelValue')?.[0]).toEqual(['profile'])
  })

  it('respects modelValue for active tab in controlled mode', () => {
    const wrapper = mountComponent({tabs, modelValue: 'settings'})
    const buttons = wrapper.findAll('[role="tab"]')
    expect(buttons[0].attributes('aria-selected')).toBe('false')
    expect(buttons[1].attributes('aria-selected')).toBe('true')
    expect(buttons[2].attributes('aria-selected')).toBe('false')
  })

  it('sets correct aria-controls and aria-labelledby', () => {
    const wrapper = mountComponent({tabs, id: 'test'})
    const buttons = wrapper.findAll('[role="tab"]')
    const panels = wrapper.findAll('[role="tabpanel"]')

    expect(buttons[0].attributes('aria-controls')).toBe('test-panel-home')
    expect(buttons[1].attributes('aria-controls')).toBe('test-panel-settings')
    expect(panels[0].attributes('aria-labelledby')).toBe('test-tab-home')
    expect(panels[1].attributes('aria-labelledby')).toBe('test-tab-settings')
  })

  it('has role="tablist" on the tab container', () => {
    const wrapper = mountComponent({tabs})
    expect(wrapper.find('[role="tablist"]').exists()).toBe(true)
  })

  it('active tab has tabindex 0, others have -1', () => {
    const wrapper = mountComponent({tabs})
    const buttons = wrapper.findAll('[role="tab"]')
    expect(buttons[0].attributes('tabindex')).toBe('0')
    expect(buttons[1].attributes('tabindex')).toBe('-1')
    expect(buttons[2].attributes('tabindex')).toBe('-1')
  })

  it('renders icon props correctly via findComponent', () => {
    const wrapper = mount(TabListForTest, {
      props: {tabs},
    })
    const icons = wrapper.findAllComponents(IconifyIcon)
    expect(icons).toHaveLength(2)
    expect(icons[0].props('icon')).toBe('mdi:home')
    expect(icons[1].props('icon')).toBe('mdi:account')
  })

  it('sets disabled attribute and aria-disabled on disabled tabs', () => {
    const disabledTabs: Tab[] = [
      {key: 'a', label: 'A'},
      {key: 'b', label: 'B', disabled: true},
    ]
    const wrapper = mountComponent({tabs: disabledTabs})
    const buttons = wrapper.findAll('[role="tab"]')
    expect(buttons[1].attributes('disabled')).toBeDefined()
    expect(buttons[1].attributes('aria-disabled')).toBe('true')
  })

  it('applies cursor-not-allowed on disabled tabs', () => {
    const disabledTabs: Tab[] = [
      {key: 'a', label: 'A'},
      {key: 'b', label: 'B', disabled: true},
    ]
    const wrapper = mountComponent({tabs: disabledTabs})
    const buttons = wrapper.findAll('[role="tab"]')
    expect(buttons[1].classes()).toContain('cursor-not-allowed')
    expect(buttons[1].classes()).not.toContain('hover:text-m-primary/70')
  })

  it('does not emit update:modelValue when clicking a disabled tab', async () => {
    const disabledTabs: Tab[] = [
      {key: 'a', label: 'A'},
      {key: 'b', label: 'B', disabled: true},
    ]
    const wrapper = mountComponent({tabs: disabledTabs, modelValue: 'a'})
    const buttons = wrapper.findAll('[role="tab"]')

    await buttons[1].trigger('click')

    expect(wrapper.emitted('update:modelValue')).toBeUndefined()
  })

  it('does not change active tab in uncontrolled mode when clicking disabled tab', async () => {
    const disabledTabs: Tab[] = [
      {key: 'a', label: 'A'},
      {key: 'b', label: 'B', disabled: true},
    ]
    const wrapper = mountComponent({tabs: disabledTabs})
    const buttons = wrapper.findAll('[role="tab"]')

    await buttons[1].trigger('click')

    expect(buttons[0].attributes('aria-selected')).toBe('true')
    expect(buttons[1].attributes('aria-selected')).toBe('false')
  })
})

describe('MalioTabList — fenêtrage maxVisibleTabs', () => {
  const sevenTabs: Tab[] = [
    {key: 't1', label: 'Tab 1'},
    {key: 't2', label: 'Tab 2'},
    {key: 't3', label: 'Tab 3'},
    {key: 't4', label: 'Tab 4'},
    {key: 't5', label: 'Tab 5'},
    {key: 't6', label: 'Tab 6'},
    {key: 't7', label: 'Tab 7'},
  ]

  it('applies the default maxWidth (1100px) on the tabs container when windowed', () => {
    const wrapper = mountComponent({tabs: sevenTabs, maxVisibleTabs: 5})
    expect(wrapper.find('[role="tablist"]').attributes('style')).toContain('max-width: 1100px')
  })

  it('applies a custom maxWidth on the tabs container', () => {
    const wrapper = mountComponent({tabs: sevenTabs, maxVisibleTabs: 5, maxWidth: 1200})
    expect(wrapper.find('[role="tablist"]').attributes('style')).toContain('max-width: 1200px')
  })

  it('renders only maxVisibleTabs buttons and disables prev at start', () => {
    const wrapper = mountComponent({tabs: sevenTabs, maxVisibleTabs: 5})
    const buttons = wrapper.findAll('[role="tab"]')
    expect(buttons).toHaveLength(5)
    expect(buttons[0].text()).toContain('Tab 1')
    expect(buttons[4].text()).toContain('Tab 5')

    const prev = wrapper.find('[data-test="tab-prev"]')
    const next = wrapper.find('[data-test="tab-next"]')
    expect(prev.exists()).toBe(true)
    expect(next.exists()).toBe(true)
    expect(prev.attributes('disabled')).toBeDefined()
    expect(next.attributes('disabled')).toBeUndefined()
  })

  it('shifts the window by 1 on next click', async () => {
    const wrapper = mountComponent({tabs: sevenTabs, maxVisibleTabs: 5})

    await wrapper.find('[data-test="tab-next"]').trigger('click')

    const labels = wrapper.findAll('[role="tab"]').map(b => b.text())
    expect(labels.some(l => l.includes('Tab 1'))).toBe(false)
    expect(labels.some(l => l.includes('Tab 6'))).toBe(true)
    expect(labels).toHaveLength(5)

    expect(wrapper.find('[data-test="tab-prev"]').attributes('disabled')).toBeUndefined()
  })

  it('disables next at the end and shows the last window', async () => {
    const wrapper = mountComponent({tabs: sevenTabs, maxVisibleTabs: 5})

    // 7 - 5 = 2 clicks to reach the end
    await wrapper.find('[data-test="tab-next"]').trigger('click')
    await wrapper.find('[data-test="tab-next"]').trigger('click')

    const next = wrapper.find('[data-test="tab-next"]')
    expect(next.attributes('disabled')).toBeDefined()

    const buttons = wrapper.findAll('[role="tab"]')
    expect(buttons).toHaveLength(5)
    // last window starts at tabs[length-5] = tabs[2] = Tab 3
    expect(buttons[0].text()).toContain('Tab 3')
    expect(buttons[4].text()).toContain('Tab 7')
  })

  it('clicking next past the end does not overshoot', async () => {
    const wrapper = mountComponent({tabs: sevenTabs, maxVisibleTabs: 5})
    const next = wrapper.find('[data-test="tab-next"]')

    await next.trigger('click')
    await next.trigger('click')
    await next.trigger('click') // guarded, no-op
    await next.trigger('click') // guarded, no-op

    const buttons = wrapper.findAll('[role="tab"]')
    expect(buttons).toHaveLength(5)
    expect(buttons[0].text()).toContain('Tab 3')
    expect(buttons[4].text()).toContain('Tab 7')
  })

  it('renders no arrows and all tabs when maxVisibleTabs is undefined', () => {
    const wrapper = mountComponent({tabs: sevenTabs})
    expect(wrapper.findAll('[role="tab"]')).toHaveLength(7)
    expect(wrapper.find('[data-test="tab-prev"]').exists()).toBe(false)
    expect(wrapper.find('[data-test="tab-next"]').exists()).toBe(false)
  })

  it('renders no arrows when maxVisibleTabs >= tabs.length', () => {
    const wrapper = mountComponent({tabs: sevenTabs, maxVisibleTabs: 7})
    expect(wrapper.findAll('[role="tab"]')).toHaveLength(7)
    expect(wrapper.find('[data-test="tab-prev"]').exists()).toBe(false)
    expect(wrapper.find('[data-test="tab-next"]').exists()).toBe(false)
  })

  it('selecting a visible tab activates it without moving the window', async () => {
    const wrapper = mountComponent({tabs: sevenTabs, maxVisibleTabs: 5})
    const buttons = wrapper.findAll('[role="tab"]')

    await buttons[2].trigger('click')

    const after = wrapper.findAll('[role="tab"]')
    expect(after[2].attributes('aria-selected')).toBe('true')
    // window unchanged
    expect(after[0].text()).toContain('Tab 1')
    expect(after).toHaveLength(5)
  })

  it('keeps the active panel rendered even when its tab is outside the window', async () => {
    const wrapper = mountComponent(
      {tabs: sevenTabs, maxVisibleTabs: 5, modelValue: 't1'},
      {t1: '<p>Panel 1</p>'},
    )

    await wrapper.find('[data-test="tab-next"]').trigger('click')
    await wrapper.find('[data-test="tab-next"]').trigger('click')

    // Tab 1 is no longer in the window
    const labels = wrapper.findAll('[role="tab"]').map(b => b.text())
    expect(labels.some(l => l.includes('Tab 1'))).toBe(false)

    // but its panel is still rendered and visible
    const panels = wrapper.findAll('[role="tabpanel"]')
    expect(panels).toHaveLength(7)
    expect(wrapper.text()).toContain('Panel 1')
  })

  it('keeps exactly one rendered tab with tabindex=0 when the active tab scrolls out of the window', async () => {
    const wrapper = mountComponent({tabs: sevenTabs, maxVisibleTabs: 5})

    // active tab is the first one (t1) by default; scroll it out of the window
    await wrapper.find('[data-test="tab-next"]').trigger('click')
    await wrapper.find('[data-test="tab-next"]').trigger('click')

    // t1 is no longer rendered
    const labels = wrapper.findAll('[role="tab"]').map(b => b.text())
    expect(labels.some(l => l.includes('Tab 1'))).toBe(false)

    const focusable = wrapper.findAll('[role="tab"]').filter(b => b.attributes('tabindex') === '0')
    expect(focusable).toHaveLength(1)
    // falls back to the first visible tab (Tab 3)
    expect(focusable[0].text()).toContain('Tab 3')
  })

  it('arrows expose aria-labels', () => {
    const wrapper = mountComponent({tabs: sevenTabs, maxVisibleTabs: 5})
    expect(wrapper.find('[data-test="tab-prev"]').attributes('aria-label')).toBe('Onglets précédents')
    expect(wrapper.find('[data-test="tab-next"]').attributes('aria-label')).toBe('Onglets suivants')
  })
})