/*
 * HSTooltip
 * @version: 3.0.1
 * @author: Preline Labs Ltd.
 * @license: Licensed under MIT and Preline UI Fair Use License (https://preline.co/docs/license.html)
 * Copyright 2024 Preline Labs Ltd.
 */

import { type Strategy, computePosition, autoUpdate, offset, flip, shift } from '@floating-ui/dom'
import { getClassProperty, dispatch, afterTransition } from '../../utils'

import { ITooltip } from './interfaces'
import { TTooltipOptionsScope } from './types'

import HSBasePlugin from '../base-plugin'
import { ICollectionItem } from '../../interfaces'

import { POSITIONS } from '../../constants'

class HSTooltip extends HSBasePlugin<{}> implements ITooltip {
  private readonly toggle: HTMLElement | null
  public content: HTMLElement | null
  readonly eventMode: string
  private readonly preventFloatingUI: string
  private readonly placement: string
  private readonly interaction: string
  private readonly strategy: Strategy
  private readonly scope: TTooltipOptionsScope

  cleanupAutoUpdate: (() => void) | null = null

  private onToggleClickListener: () => void
  private onToggleFocusListener: () => void
  private onToggleMouseEnterListener: () => void
  private onToggleMouseLeaveListener: () => void
  private onToggleHandleListener: () => void

  constructor(el: HTMLElement, options?: {}, events?: {}) {
    super(el, options, events)

    if (this.el) {
      this.toggle = this.el.querySelector('.tooltip-toggle') || this.el
      this.content = this.el.querySelector('.tooltip-content')
      this.eventMode = getClassProperty(this.el, '--trigger') || 'hover'

      this.preventFloatingUI = getClassProperty(this.el, '--prevent-popper', 'false')
      this.placement = getClassProperty(this.el, '--placement')
      this.interaction = getClassProperty(this.el, '--interaction', 'true')
      this.strategy = getClassProperty(this.el, '--strategy') as Strategy
      this.scope = (getClassProperty(this.el, '--scope') as TTooltipOptionsScope) || 'parent'
    }

    if (this.el && this.toggle && this.content) this.init()
  }

  private toggleClick() {
    this.click()
  }

  private toggleFocus() {
    this.focus()
  }

  private toggleMouseEnter() {
    this.enter()
  }

  private toggleMouseLeave() {
    this.leave()
  }

  private toggleHandle() {
    this.hide()

    this.toggle.removeEventListener('click', this.onToggleHandleListener, true)
    this.toggle.removeEventListener('blur', this.onToggleHandleListener, true)
  }

  private init() {
    this.createCollection(window.$hsTooltipCollection, this)

    if (this.eventMode === 'click') {
      this.onToggleClickListener = () => this.toggleClick()

      this.toggle.addEventListener('click', this.onToggleClickListener)
    } else if (this.eventMode === 'focus') {
      this.onToggleFocusListener = () => this.toggleFocus()

      this.toggle.addEventListener('click', this.onToggleFocusListener)
    } else if (this.eventMode === 'hover') {
      this.onToggleMouseEnterListener = () => this.toggleMouseEnter()
      this.onToggleMouseLeaveListener = () => this.toggleMouseLeave()

      this.toggle.addEventListener('mouseenter', this.onToggleMouseEnterListener)
      this.toggle.addEventListener('mouseleave', this.onToggleMouseLeaveListener)
    }

    this.buildFloatingUI()
  }

  private enter() {
    this._show()
  }

  private leave() {
    this.hide()
  }

  //  This function is updated in flyonui.
  private click() {
    if (this.el.classList.contains('show')) {
      this.hide()
    } else {
      this._show()

      this.onToggleHandleListener = () => {
        setTimeout(() => this.toggleHandle())
      }

      this.toggle.addEventListener('click', this.onToggleHandleListener, true)
      this.toggle.addEventListener('blur', this.onToggleHandleListener, true)
    }
  }

  //  This is added in FlyonUI
  private focus() {
    this._show()
    if (this.interaction === 'true') {
      const handleClickInsidePopover = (event: MouseEvent) => {
        if (this.content && this.content.contains(event.target as Node)) {
          event.stopPropagation()
        }
      }

      this.content?.addEventListener('click', handleClickInsidePopover)

      const handleClickOutsidePopover = (event: MouseEvent) => {
        if (!this.content?.contains(event.target as Node) && !this.el.contains(event.target as Node)) {
          this.hide()
        }
      }
      document.body.addEventListener('click', handleClickOutsidePopover)
    } else {
      const handle = () => {
        this.hide()

        this.toggle.removeEventListener('blur', handle, true)
      }
      this.toggle.addEventListener('blur', handle, true)
    }
  }

  private buildFloatingUI() {
    if (this.scope === 'window') document.body.appendChild(this.content)
    const position = POSITIONS[this.placement] ?? 'top'
    const verticalPositions = new Set(['top', 'top-start', 'top-end', 'bottom', 'bottom-start', 'bottom-end'])
    const isVerticalPosition = verticalPositions.has(position)

    const isFloatingAllowed = this.preventFloatingUI === 'false'
    const shouldApplyShift = isFloatingAllowed && isVerticalPosition
    const shouldApplyFlip = isFloatingAllowed

    const middleware = [offset(0), ...(shouldApplyShift ? [shift()] : []), ...(shouldApplyFlip ? [flip()] : [])]

    computePosition(this.toggle, this.content, {
      placement: POSITIONS[this.placement] || 'top',
      strategy: this.strategy || 'fixed',
      middleware: middleware
    }).then(({ x, y }: { x: number; y: number }) => {
      Object.assign(this.content.style, {
        position: this.strategy || 'fixed',
        left: `${x}px`,
        top: `${y}px`
      })
    })

    this.cleanupAutoUpdate = autoUpdate(this.toggle, this.content, () => {
      computePosition(this.toggle, this.content, {
        placement: POSITIONS[this.placement] || 'top',
        strategy: this.strategy || 'fixed',
        middleware: middleware
      }).then(({ x, y }: { x: number; y: number }) => {
        Object.assign(this.content.style, {
          left: `${x}px`,
          top: `${y}px`
        })
      })
    })
  }

  private _show() {
    this.content.classList.remove('hidden')
    if (this.scope === 'window') this.content.classList.add('show')

    if (!this.cleanupAutoUpdate) this.buildFloatingUI()

    setTimeout(() => {
      this.el.classList.add('show')

      this.fireEvent('show', this.el)
      dispatch('show.tooltip', this.el, this.el)
    })
  }

  // Public methods
  public show() {
    switch (this.eventMode) {
      case 'click':
        this.click()
        break
      case 'focus':
        this.focus()
        break
      default:
        this.enter()
        break
    }

    this.toggle.focus()
    this.toggle.style.outline = 'none'
  }

  public hide() {
    this.el.classList.remove('show')
    if (this.scope === 'window') this.content.classList.remove('show')

    if (this.cleanupAutoUpdate) {
      this.cleanupAutoUpdate()

      this.cleanupAutoUpdate = null
    }

    this.fireEvent('hide', this.el)
    dispatch('hide.tooltip', this.el, this.el)

    afterTransition(this.content, () => {
      if (this.el.classList.contains('show')) return false

      this.content.classList.add('hidden')

      this.toggle.style.outline = ''
    })
  }

  public destroy() {
    // Remove classes
    this.el.classList.remove('show')
    this.content.classList.add('hidden')

    // Remove listeners
    if (this.eventMode === 'click') {
      this.toggle.removeEventListener('click', this.onToggleClickListener)
    } else if (this.eventMode === 'focus') {
      this.toggle.removeEventListener('click', this.onToggleFocusListener)
    } else if (this.eventMode === 'hover') {
      this.toggle.removeEventListener('mouseenter', this.onToggleMouseEnterListener)
      this.toggle.removeEventListener('mouseleave', this.onToggleMouseLeaveListener)
    }
    this.toggle.removeEventListener('click', this.onToggleHandleListener, true)
    this.toggle.removeEventListener('blur', this.onToggleHandleListener, true)

    if (this.cleanupAutoUpdate) {
      this.cleanupAutoUpdate()
      this.cleanupAutoUpdate = null
    }

    window.$hsTooltipCollection = window.$hsTooltipCollection.filter(({ element }) => element.el !== this.el)
  }

  // Static methods
  private static findInCollection(target: HSTooltip | HTMLElement | string): ICollectionItem<HSTooltip> | null {
    return (
      window.$hsTooltipCollection.find(el => {
        if (target instanceof HSTooltip) return el.element.el === target.el
        else if (typeof target === 'string') return el.element.el === document.querySelector(target)
        else return el.element.el === target
      }) || null
    )
  }

  static getInstance(target: HTMLElement | string, isInstance = false) {
    const elInCollection = window.$hsTooltipCollection.find(
      el => el.element.el === (typeof target === 'string' ? document.querySelector(target) : target)
    )

    return elInCollection ? (isInstance ? elInCollection : elInCollection.element.el) : null
  }

  static autoInit() {
    if (!window.$hsTooltipCollection) window.$hsTooltipCollection = []

    if (window.$hsTooltipCollection)
      window.$hsTooltipCollection = window.$hsTooltipCollection.filter(({ element }) => document.contains(element.el))

    document.querySelectorAll('.tooltip:not(.--prevent-on-load-init)').forEach((el: HTMLElement) => {
      if (!window.$hsTooltipCollection.find(elC => (elC?.element?.el as HTMLElement) === el)) new HSTooltip(el)
    })
  }

  static show(target: HSTooltip | HTMLElement | string) {
    const instance = HSTooltip.findInCollection(target)

    if (instance) instance.element.show()
  }

  static hide(target: HSTooltip | HTMLElement | string) {
    const instance = HSTooltip.findInCollection(target)

    if (instance) instance.element.hide()
  }

  // Backward compatibility
  static on(evt: string, target: HSTooltip | HTMLElement | string, cb: Function) {
    const instance = HSTooltip.findInCollection(target)

    if (instance) instance.element.events[evt] = cb
  }
}

declare global {
  interface Window {
    HSTooltip: Function
    $hsTooltipCollection: ICollectionItem<HSTooltip>[]
  }
}

window.addEventListener('load', () => {
  HSTooltip.autoInit()

  // Uncomment for debug
  // console.log('Tooltip collection:', window.$hsTooltipCollection);
})

if (typeof window !== 'undefined') {
  window.HSTooltip = HSTooltip
}

export default HSTooltip