/*
 * HSStrongPassword
 * @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 { isEnoughSpace, dispatch, htmlToElement, classToClassList } from '../../utils'

import { IStrongPasswordOptions, IStrongPassword } from './interfaces'

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

class HSStrongPassword extends HSBasePlugin<IStrongPasswordOptions> implements IStrongPassword {
  private readonly target: string | HTMLInputElement | null
  private readonly hints: string | HTMLElement | null
  private readonly stripClasses: string | null
  private readonly minLength: number
  private readonly mode: string
  private readonly popoverSpace: number
  private readonly checksExclude: string[] | null
  private readonly specialCharactersSet: string | null

  public isOpened: boolean = false
  private strength: number = 0
  private passedRules: Set<string> = new Set<string>()
  private weakness: HTMLElement | null
  private rules: HTMLElement[] | null
  private availableChecks: string[] | null

  private onTargetInputListener: (evt: InputEvent) => void
  private onTargetFocusListener: () => void
  private onTargetBlurListener: () => void
  private onTargetInputSecondListener: () => void
  private onTargetInputThirdListener: () => void

  constructor(el: HTMLElement, options?: IStrongPasswordOptions) {
    super(el, options)

    const data = el.getAttribute('data-strong-password')
    const dataOptions: IStrongPasswordOptions = data ? JSON.parse(data) : {}
    const concatOptions = {
      ...dataOptions,
      ...options
    }

    this.target = concatOptions?.target
      ? typeof concatOptions?.target === 'string'
        ? (document.querySelector(concatOptions.target) as HTMLInputElement)
        : concatOptions.target
      : null
    this.hints = concatOptions?.hints
      ? typeof concatOptions?.hints === 'string'
        ? (document.querySelector(concatOptions.hints) as HTMLElement)
        : concatOptions.hints
      : null
    this.stripClasses = concatOptions?.stripClasses || null
    this.minLength = concatOptions?.minLength || 6
    this.mode = concatOptions?.mode || 'default'
    this.popoverSpace = concatOptions?.popoverSpace || 10
    this.checksExclude = concatOptions?.checksExclude || []
    this.availableChecks = ['lowercase', 'uppercase', 'numbers', 'special-characters', 'min-length'].filter(
      el => !this.checksExclude.includes(el)
    )
    this.specialCharactersSet = concatOptions?.specialCharactersSet || '!"#$%&\'()*+,-./:;<=>?@[\\\\\\]^_`{|}~'

    if (this.target) this.init()
  }

  private targetInput(evt: InputEvent) {
    this.setStrength((evt.target as HTMLInputElement).value)
  }

  private targetFocus() {
    this.isOpened = true
    ;(this.hints as HTMLElement).classList.remove('hidden')
    ;(this.hints as HTMLElement).classList.add('block')

    this.recalculateDirection()
  }

  private targetBlur() {
    this.isOpened = false
    ;(this.hints as HTMLElement).classList.remove('block', 'bottom-full', 'top-full')
    ;(this.hints as HTMLElement).classList.add('hidden')
    ;(this.hints as HTMLElement).style.marginTop = ''
    ;(this.hints as HTMLElement).style.marginBottom = ''
  }

  private targetInputSecond() {
    this.setWeaknessText()
  }

  private targetInputThird() {
    this.setRulesText()
  }

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

    if (this.availableChecks.length) this.build()
  }

  private build() {
    this.buildStrips()
    if (this.hints) this.buildHints()

    this.setStrength((this.target as HTMLInputElement).value)

    this.onTargetInputListener = evt => this.targetInput(evt)
    ;(this.target as HTMLInputElement).addEventListener('input', this.onTargetInputListener)
  }

  private buildStrips() {
    this.el.innerHTML = ''

    if (this.stripClasses) {
      for (let i = 0; i < this.availableChecks.length; i++) {
        const newStrip = htmlToElement('<div></div>')
        classToClassList(this.stripClasses, newStrip)

        this.el.append(newStrip)
      }
    }
  }

  private buildHints() {
    this.weakness = (this.hints as HTMLElement).querySelector('[data-pw-strength-hint]') || null
    this.rules = Array.from((this.hints as HTMLElement).querySelectorAll('[data-pw-strength-rule]')) || null

    this.rules.forEach(rule => {
      const ruleValue = rule.getAttribute('data-pw-strength-rule')

      if (this.checksExclude?.includes(ruleValue)) rule.remove()
    })

    if (this.weakness) this.buildWeakness()
    if (this.rules) this.buildRules()
    if (this.mode === 'popover') {
      this.onTargetFocusListener = () => this.targetFocus()
      this.onTargetBlurListener = () => this.targetBlur()
      ;(this.target as HTMLInputElement).addEventListener('focus', this.onTargetFocusListener)
      ;(this.target as HTMLInputElement).addEventListener('blur', this.onTargetBlurListener)
    }
  }

  private buildWeakness() {
    this.checkStrength((this.target as HTMLInputElement).value)
    this.setWeaknessText()

    this.onTargetInputSecondListener = () => setTimeout(() => this.targetInputSecond())
    ;(this.target as HTMLInputElement).addEventListener('input', this.onTargetInputSecondListener)
  }

  private buildRules() {
    this.setRulesText()

    this.onTargetInputThirdListener = () => setTimeout(() => this.targetInputThird())
    ;(this.target as HTMLInputElement).addEventListener('input', this.onTargetInputThirdListener)
  }

  private setWeaknessText() {
    const weaknessText = this.weakness.getAttribute('data-pw-strength-hint')
    const weaknessTextToJson = JSON.parse(weaknessText as string)

    this.weakness.textContent = weaknessTextToJson[this.strength]
  }

  private setRulesText() {
    this.rules.forEach(rule => {
      const ruleValue = rule.getAttribute('data-pw-strength-rule')

      this.checkIfPassed(rule, this.passedRules.has(ruleValue))
    })
  }

  private togglePopover() {
    const popover = this.el.querySelector('.popover')

    if (popover) popover.classList.toggle('show')
  }

  private checkStrength(val: string): { strength: number; rules: Set<string> } {
    const passedRules = new Set<string>()
    const regexps = {
      lowercase: /[a-z]+/,
      uppercase: /[A-Z]+/,
      numbers: /[0-9]+/,
      'special-characters': new RegExp(`[${this.specialCharactersSet}]`)
    }
    let strength = 0

    if (this.availableChecks.includes('lowercase') && val.match(regexps['lowercase'])) {
      strength += 1
      passedRules.add('lowercase')
    }
    if (this.availableChecks.includes('uppercase') && val.match(regexps['uppercase'])) {
      strength += 1
      passedRules.add('uppercase')
    }
    if (this.availableChecks.includes('numbers') && val.match(regexps['numbers'])) {
      strength += 1
      passedRules.add('numbers')
    }
    if (this.availableChecks.includes('special-characters') && val.match(regexps['special-characters'])) {
      strength += 1
      passedRules.add('special-characters')
    }
    if (this.availableChecks.includes('min-length') && val.length >= this.minLength) {
      strength += 1
      passedRules.add('min-length')
    }
    if (!val.length) {
      strength = 0
    }

    if (strength === this.availableChecks.length) this.el.classList.add('accepted')
    else this.el.classList.remove('accepted')

    this.strength = strength
    this.passedRules = passedRules

    return {
      strength: this.strength,
      rules: this.passedRules
    }
  }

  private checkIfPassed(el: HTMLElement, isRulePassed = false) {
    const check = el.querySelector('[data-check]')
    const uncheck = el.querySelector('[data-uncheck]')

    if (isRulePassed) {
      el.classList.add('active')
      check.classList.remove('hidden')
      uncheck.classList.add('hidden')
    } else {
      el.classList.remove('active')
      check.classList.add('hidden')
      uncheck.classList.remove('hidden')
    }
  }

  private setStrength(val: string) {
    const { strength, rules } = this.checkStrength(val)
    const payload = {
      strength,
      rules
    }

    this.hideStrips(strength)

    this.fireEvent('change', payload)
    dispatch('change.strongPassword', this.el, payload)
  }

  private hideStrips(qty: number) {
    Array.from(this.el.children).forEach((el: HTMLElement, i: number) => {
      if (i < qty) el.classList.add('passed')
      else el.classList.remove('passed')
    })
  }

  // Public methods
  public recalculateDirection() {
    if (isEnoughSpace(this.hints as HTMLElement, this.target as HTMLInputElement, 'bottom', this.popoverSpace)) {
      ;(this.hints as HTMLElement).classList.remove('bottom-full')
      ;(this.hints as HTMLElement).classList.add('top-full')
      ;(this.hints as HTMLElement).style.marginBottom = ''
      ;(this.hints as HTMLElement).style.marginTop = `${this.popoverSpace}px`
    } else {
      ;(this.hints as HTMLElement).classList.remove('top-full')
      ;(this.hints as HTMLElement).classList.add('bottom-full')
      ;(this.hints as HTMLElement).style.marginTop = ''
      ;(this.hints as HTMLElement).style.marginBottom = `${this.popoverSpace}px`
    }
  }

  public destroy() {
    // Remove listeners
    ;(this.target as HTMLInputElement).removeEventListener('input', this.onTargetInputListener)
    ;(this.target as HTMLInputElement).removeEventListener('focus', this.onTargetFocusListener)
    ;(this.target as HTMLInputElement).removeEventListener('blur', this.onTargetBlurListener)
    ;(this.target as HTMLInputElement).removeEventListener('input', this.onTargetInputSecondListener)
    ;(this.target as HTMLInputElement).removeEventListener('input', this.onTargetInputThirdListener)

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

  // Static methods
  static getInstance(target: HTMLElement | string, isInstance?: boolean) {
    const elInCollection = window.$hsStrongPasswordCollection.find(
      el => el.element.el === (typeof target === 'string' ? document.querySelector(target) : target)
    )

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

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

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

    document.querySelectorAll('[data-strong-password]:not(.--prevent-on-load-init)').forEach((el: HTMLElement) => {
      if (!window.$hsStrongPasswordCollection.find(elC => (elC?.element?.el as HTMLElement) === el)) {
        const data = el.getAttribute('data-strong-password')
        const options: IStrongPasswordOptions = data ? JSON.parse(data) : {}

        new HSStrongPassword(el, options)
      }
    })
  }
}

declare global {
  interface Window {
    HSStrongPassword: Function
    $hsStrongPasswordCollection: ICollectionItem<HSStrongPassword>[]
  }
}

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

  // Uncomment for debug
  // console.log('Strong password collection:', window.$hsStrongPasswordCollection);
})

document.addEventListener('scroll', () => {
  if (!window.$hsStrongPasswordCollection) return false

  const target = window.$hsStrongPasswordCollection.find(el => el.element.isOpened)

  if (target) target.element.recalculateDirection()
})

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

export default HSStrongPassword