import {afterEach, beforeEach, describe, expect, it, vi} from 'vitest'
import {mount} from '@vue/test-utils'
import type {DefineComponent} from 'vue'
import Date_ from './Date.vue'

type DateProps = {
  id?: string
  name?: string
  label?: string
  modelValue?: string | null
  placeholder?: string
  required?: boolean
  disabled?: boolean
  readonly?: boolean
  hint?: string
  error?: string
  success?: string
  min?: string
  max?: string
  clearable?: boolean
  inputClass?: string
  labelClass?: string
  groupClass?: string
}

const DateForTest = Date_ as DefineComponent<DateProps>
const mountDate = (props: DateProps = {}) => mount(DateForTest, {props, attachTo: document.body})

describe('MalioDate', () => {
  beforeEach(() => {
    vi.useFakeTimers()
    vi.setSystemTime(new Date(2026, 4, 19)) // 19 mai 2026
  })
  afterEach(() => vi.useRealTimers())

  describe('rendu', () => {
    it('renders the label and the calendar icon', () => {
      const wrapper = mountDate({label: 'Date de naissance'})
      expect(wrapper.get('label').text()).toBe('Date de naissance')
      expect(wrapper.find('[data-test="calendar-icon"]').exists()).toBe(true)
    })

    it('displays the formatted value in the field', () => {
      const wrapper = mountDate({modelValue: '2026-05-19'})
      const input = wrapper.get('[data-test="date-input"]').element as HTMLInputElement
      expect(input.value).toBe('19/05/2026')
    })

    it('does not show the popover initially', () => {
      const wrapper = mountDate()
      expect(wrapper.find('[data-test="popover"]').exists()).toBe(false)
    })
  })

  describe('popover', () => {
    it('opens on field click', async () => {
      const wrapper = mountDate()
      await wrapper.get('[data-test="date-input"]').trigger('click')
      expect(wrapper.find('[data-test="popover"]').exists()).toBe(true)
    })

    it('opens on the current month when there is no value', async () => {
      const wrapper = mountDate()
      await wrapper.get('[data-test="date-input"]').trigger('click')
      expect(wrapper.get('[data-test="header-toggle"]').text()).toContain('Mai 2026')
    })

    it('opens on the value month when a value is set', async () => {
      const wrapper = mountDate({modelValue: '2025-12-25'})
      await wrapper.get('[data-test="date-input"]').trigger('click')
      expect(wrapper.get('[data-test="header-toggle"]').text()).toContain('Décembre 2025')
    })

    it('closes on outside mousedown', async () => {
      const wrapper = mountDate()
      await wrapper.get('[data-test="date-input"]').trigger('click')
      document.body.dispatchEvent(new MouseEvent('mousedown', {bubbles: true}))
      await wrapper.vm.$nextTick()
      expect(wrapper.find('[data-test="popover"]').exists()).toBe(false)
    })
  })

  describe('navigation jours', () => {
    it('goes to the next month on the right chevron', async () => {
      const wrapper = mountDate()
      await wrapper.get('[data-test="date-input"]').trigger('click')
      await wrapper.get('[data-test="header-next"]').trigger('click')
      expect(wrapper.get('[data-test="header-toggle"]').text()).toContain('Juin 2026')
    })

    it('rolls December to January and bumps the year', async () => {
      const wrapper = mountDate({modelValue: '2026-12-15'})
      await wrapper.get('[data-test="date-input"]').trigger('click')
      await wrapper.get('[data-test="header-next"]').trigger('click')
      expect(wrapper.get('[data-test="header-toggle"]').text()).toContain('Janvier 2027')
    })
  })

  describe('sélection', () => {
    it('emits the ISO date and closes on day click', async () => {
      const wrapper = mountDate()
      await wrapper.get('[data-test="date-input"]').trigger('click')
      await wrapper.get('[data-test="day"][data-iso="2026-05-19"]').trigger('click')
      expect(wrapper.emitted('update:modelValue')?.at(-1)).toEqual(['2026-05-19'])
      expect(wrapper.find('[data-test="popover"]').exists()).toBe(false)
    })
  })

  describe('bornes min/max', () => {
    it('disables days outside the range', async () => {
      const wrapper = mountDate({min: '2026-05-10', max: '2026-05-20'})
      await wrapper.get('[data-test="date-input"]').trigger('click')
      const outside = wrapper.get('[data-test="day"][data-iso="2026-05-05"]')
      expect((outside.element as HTMLButtonElement).disabled).toBe(true)
      await outside.trigger('click')
      expect(wrapper.emitted('update:modelValue')).toBeUndefined()
    })
  })

  describe('vue mois', () => {
    it('switches to month view on header toggle', async () => {
      const wrapper = mountDate()
      await wrapper.get('[data-test="date-input"]').trigger('click')
      await wrapper.get('[data-test="header-toggle"]').trigger('click')
      expect(wrapper.find('[data-test="month-picker"]').exists()).toBe(true)
    })

    it('navigates the year with chevrons in month view', async () => {
      const wrapper = mountDate()
      await wrapper.get('[data-test="date-input"]').trigger('click')
      await wrapper.get('[data-test="header-toggle"]').trigger('click')
      await wrapper.get('[data-test="header-next"]').trigger('click')
      expect(wrapper.get('[data-test="header-toggle"]').text()).toContain('2027')
    })

    it('returns to day view on month click', async () => {
      const wrapper = mountDate()
      await wrapper.get('[data-test="date-input"]').trigger('click')
      await wrapper.get('[data-test="header-toggle"]').trigger('click')
      await wrapper.get('[data-test="month"][data-month="0"]').trigger('click')
      expect(wrapper.find('[data-test="month-picker"]').exists()).toBe(false)
      expect(wrapper.get('[data-test="header-toggle"]').text()).toContain('Janvier 2026')
      expect(wrapper.emitted('update:modelValue')).toBeUndefined()
    })
  })

  describe('effacement', () => {
    it('shows the clear button when there is a value', () => {
      const wrapper = mountDate({modelValue: '2026-05-19'})
      expect(wrapper.find('[data-test="clear"]').exists()).toBe(true)
    })

    it('hides the clear button when empty', () => {
      const wrapper = mountDate()
      expect(wrapper.find('[data-test="clear"]').exists()).toBe(false)
    })

    it('emits null and does not open the popover on clear', async () => {
      const wrapper = mountDate({modelValue: '2026-05-19'})
      await wrapper.get('[data-test="clear"]').trigger('click')
      expect(wrapper.emitted('update:modelValue')?.at(-1)).toEqual([null])
      expect(wrapper.find('[data-test="popover"]').exists()).toBe(false)
    })
  })

  describe('états', () => {
    it('does not open when disabled', async () => {
      const wrapper = mountDate({disabled: true})
      await wrapper.get('[data-test="date-input"]').trigger('click')
      expect(wrapper.find('[data-test="popover"]').exists()).toBe(false)
    })

    it('does not open when readonly', async () => {
      const wrapper = mountDate({readonly: true, modelValue: '2026-05-19'})
      await wrapper.get('[data-test="date-input"]').trigger('click')
      expect(wrapper.find('[data-test="popover"]').exists()).toBe(false)
    })
  })

  describe('accessibilité', () => {
    it('sets aria-invalid and describedby on error', () => {
      const wrapper = mountDate({error: 'Date requise'})
      const input = wrapper.get('[data-test="date-input"]')
      expect(input.attributes('aria-invalid')).toBe('true')
      expect(input.attributes('aria-describedby')).toBeTruthy()
      expect(wrapper.text()).toContain('Date requise')
    })
  })

  describe('synchronisation externe', () => {
    it('updates the displayed value when modelValue changes', async () => {
      const wrapper = mountDate({modelValue: '2026-05-19'})
      await wrapper.setProps({modelValue: '2026-12-25'})
      const input = wrapper.get('[data-test="date-input"]').element as HTMLInputElement
      expect(input.value).toBe('25/12/2026')
    })
  })
})