/*!
 * @license MPL-2.0
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at https://mozilla.org/MPL/2.0/.
 *
 * Contributors:
 *   - See Git history at https://github.com/FilteringDev/NamuLink for detailed authorship information.
 */

type unsafeWindow = typeof window
// eslint-disable-next-line @typescript-eslint/naming-convention
declare const unsafeWindow: unsafeWindow

const Win = typeof unsafeWindow !== 'undefined' ? unsafeWindow : window
const UserscriptName = 'NamuLink'

import { AttachVueSettledEvents } from './vuejsawait.js'
import { WaitForElement } from './dom-await.js'
import { CreateOcrWorkerClient } from './ocr-client.js'

// eslint-disable-next-line @typescript-eslint/naming-convention
declare const __OCR_WORKER_CODE__: string

// BUILD:START

const OriginalReflectApply = Win.Reflect.apply

const PL2PromiseThenRegexs: RegExp[][] = [[
  /function *[A-Za-z0-9]+ *\([A-Za-z0-9]+ * *\) *{ *function *[A-Za-z0-9]+ *\( *[a-zA-Z]+ *, *[A-Za-z]+ *\) *{ *return *[A-Za-z0-9]+ *\( */,
  /{ *return *[A-Za-z0-9]+ *\( *[a-zA-Z]+[- ]*0x[a-f0-9]+ *, *[a-zA-Z]+ *\) *; *\} *[A-Za-z0-9]+ *\( *[A-Za-z0-9]+ *, *[A-Za-z0-9]+ *, *[A-Za-z0-9]+/,
  /\( *[A-Za-z0-9]+ *, *[A-Za-z0-9]+ *, *[A-Za-z0-9]+ *, *[A-Za-z0-9]+ *, *[A-Za-z0-9]+ *, *[A-Za-z0-9]+ *\( *0x[a-f0-9]+ *, *0x[a-f0-9]+ *\) *, *[A-Za-z0-9]+ *\) *;/
]]

Win.Promise.prototype.then = new Proxy(Win.Promise.prototype.then, {
  apply(Target: typeof Promise.prototype.then, ThisArg: Promise<unknown>, Args: Parameters<typeof Promise.prototype.then>) {
    if (typeof Args[0] !== 'function' || typeof Args[1] !== 'function') {
      return OriginalReflectApply(Target, ThisArg, Args)
    }
    const Stringified: [string, string] = [String(Args[0]), String(Args[1])]
    if (Stringified.every(Str => PL2PromiseThenRegexs.filter(Regexs => Regexs.filter(Regex => Regex.test(Str)).length === Regexs.length).length === 1)) {
      console.debug(`[${UserscriptName}] Detected PL2 Promise.then`, Stringified, Args)
      setTimeout(() => {
        let Targeted = [...document.querySelectorAll('#app div[class] div[class] ~ div[class]')].filter(Ele => Ele instanceof HTMLElement)
        Targeted = Targeted.filter(Ele => parseFloat(getComputedStyle(Ele).getPropertyValue('margin-bottom')) >= 12.5)
        Targeted = Targeted.filter(Ele => Ele.innerText.trim().length === 0)
        Targeted = Targeted.filter(Ele => [...Ele.querySelectorAll('*')].filter(Child => Child instanceof HTMLElement).some(Child => {
          const Height = Child.getBoundingClientRect().height
          return Height > 0 && Height <= 5
        }))
        console.debug(`[${UserscriptName}] Detected PL2 Promise.then Targeted`, Targeted)
        Targeted.forEach(Ele => {
          Ele.style.setProperty('display', 'none', 'important')
        })
      }, 250)
      return
    }
    return OriginalReflectApply(Target, ThisArg, Args)
  }
})

const ArticleHTMLElement = await WaitForElement('#app', Win.document)
const EventName = 'vue:settled'
const ChangeEventName = 'vue:change'
const UrlChangeEventName = 'vue:url-changed'
const UrlBlackBlankEventName = 'vue:black-blank'
AttachVueSettledEvents(ArticleHTMLElement, {
  QuietMs: 75,
  EventName: EventName,
  ChangeEventName: ChangeEventName,
  UrlChange: UrlChangeEventName,
  BlackBlank: UrlBlackBlankEventName
})

const OCRInstance = CreateOcrWorkerClient(Win, new Worker(URL.createObjectURL(new Blob([__OCR_WORKER_CODE__], { type: 'application/javascript' }))))

async function ExecuteOCR(Targeted: HTMLElement[]) {
  const NextTargeted = []
    for (const Parent of Targeted) {
      const CandidateChildren = [...Parent.querySelectorAll('*')]
        .filter(Child => Child instanceof HTMLElement)
        .filter(Child =>
          Child instanceof HTMLImageElement ||
          getComputedStyle(Child).backgroundImage !== 'none'
        ).filter(Child => parseFloat(getComputedStyle(Child).getPropertyValue('width')) >= 5 && parseFloat(getComputedStyle(Child).getPropertyValue('height')) >= 5)
        .filter(Child => parseFloat(getComputedStyle(Child).getPropertyValue('width')) <= 50 && parseFloat(getComputedStyle(Child).getPropertyValue('height')) <= 50)
      let MatchedCount = 0
      for (const Child of CandidateChildren) {
        const Result = await OCRInstance.DetectFromElement(Child, {
          ScoreThreshold: 0.32
        })
        if (Result !== null) {
          MatchedCount += 1
        }
        if (MatchedCount >= 1) {
          NextTargeted.push(Parent)
          break
        }
      }
    }
    return NextTargeted
}

function AllParents(Ele: HTMLElement): Set<HTMLElement> {
  let SetHTMLElement = new Set([Ele])
  for (let I = 0;; I++) {
    let Upper = [...SetHTMLElement][I].parentElement
    if (Upper === null) {
      break
    }
    SetHTMLElement.add(Upper)
  }
  return SetHTMLElement
}

async function Handler(EventParameter: Event) {
  let Targeted = [...document.querySelectorAll('#app div[class] div[class] ~ div[class]')].filter(Ele => Ele instanceof HTMLElement)
  Targeted = Targeted.filter(Ele =>
    parseFloat(getComputedStyle(Ele).getPropertyValue('padding-top')) >= 20 ||
    parseFloat(getComputedStyle(Ele).getPropertyValue('margin-top')) >= 20 ||
    parseFloat(getComputedStyle(Ele).getPropertyValue('margin-bottom')) >= 12.5
  )
  Targeted = Targeted.filter(Ele => {
    let Children = [...Ele.querySelectorAll('*')].filter(Child => Child instanceof HTMLElement)
    // non-HTMLTableElement
    if (Children.filter(Child => 
      parseFloat(getComputedStyle(Child).getPropertyValue('padding-top')) >= 5 &&
      parseFloat(getComputedStyle(Child).getPropertyValue('border-bottom-width')) >= 0.1
    ).length === 1) return true
    // HTMLTableElement
    return Children.filter(Child => (Child instanceof HTMLTableElement || Child instanceof HTMLTableCellElement) &&
      parseFloat(getComputedStyle(Child).getPropertyValue('padding-top')) >= 5 && parseFloat(getComputedStyle(Child).getPropertyValue('padding-bottom')) >= 5).length >= 2
  })
  Targeted = Targeted.filter(Ele => {
    let Children = [...Ele.querySelectorAll('*')].filter(Child => Child instanceof HTMLElement)
    return !Children.some(Child => {
      return parseFloat(getComputedStyle(Child).getPropertyValue('margin-bottom')) >= 10 && parseFloat(getComputedStyle(Child).getPropertyValue('padding-bottom')) >= 1 && parseFloat(getComputedStyle(Child).getPropertyValue('padding-top')) >= 1 &&
      parseFloat(getComputedStyle(Child).getPropertyValue('border-top-width')) >= 0.25 && parseFloat(getComputedStyle(Child).getPropertyValue('border-bottom-width')) >= 0.25
    })
  })
  Targeted = Targeted.filter(Ele => {
    let Children = [...Ele.querySelectorAll('*')].filter(Child => Child instanceof HTMLElement)
    Children = Children.filter(Child => parseFloat(getComputedStyle(Child).getPropertyValue('padding-right')) >= 10 && parseFloat(getComputedStyle(Child).getPropertyValue('padding-bottom')) >= 10)
    Children = Children.filter(Child => parseFloat(getComputedStyle(Child).getPropertyValue('margin-left')) >= 2.5)
    return Children.length === 0
  })
  Targeted = Targeted.filter(Ele => {
    if (Ele.getBoundingClientRect().width < 500 && Win.document.body.getBoundingClientRect().width > 500) return false
    let Children = [...Ele.querySelectorAll('*[style]')].filter(Child => Child instanceof HTMLElement && Child.style.length > 0)
    return Children.filter(Child => {
      if (!(Child instanceof HTMLElement)) return false
      const ComputedStyle = getComputedStyle(Child)
      const MissingCount = [...Child.style].filter(Property => {
        const InlineValue = Child.style.getPropertyValue(Property).trim()
        const ComputedValue = ComputedStyle.getPropertyValue(Property).trim()
        return InlineValue !== ComputedValue
      }).length
      return MissingCount <= 1
    }).length < 10
  })
  Targeted = await ExecuteOCR(Targeted)
  Targeted.forEach(Ele => Targeted.push(...new Set([...Ele.querySelectorAll('*')].filter(Child => Child instanceof HTMLElement))))
  Targeted = [...new Set(Targeted)]
  let RealTargeted = Targeted.filter(Ele => parseFloat(getComputedStyle(Ele).getPropertyValue('padding-left')) >= 5 && parseFloat(getComputedStyle(Ele).getPropertyValue('border-right-width')) >= 0.1)
  console.debug(`[${UserscriptName}] ${EventParameter.type} RealTargeted`, RealTargeted, EventParameter)
  RealTargeted.forEach(Ele => {
    Ele.style.setProperty('display', 'none', 'important')
  })
  let RealTabletTargeted = Targeted.filter(Ele => {
    if (!(Ele instanceof HTMLElement) || !(Ele instanceof HTMLTableElement)) return false
    let Children = [...Ele.querySelectorAll('*')].filter(Child => Child instanceof HTMLElement)
    return Children.some(Child => parseFloat(getComputedStyle(Child).getPropertyValue('padding-top')) >= 5 && parseFloat(getComputedStyle(Child).getPropertyValue('padding-bottom')) >= 5)
  })
  console.debug(`[${UserscriptName}] ${EventParameter.type} RealTabletTargeted`, RealTabletTargeted, EventParameter)
  RealTabletTargeted.forEach(Ele => {
    Ele.style.setProperty('display', 'none', 'important')
  })

  // leftover
  const PlaceHolderCandidated: Set<HTMLElement> = new Set([...RealTargeted, ...RealTabletTargeted])
  PlaceHolderCandidated.forEach(PlaceHolder => {
    let Parents = [...AllParents(PlaceHolder)].filter(Ele => Ele.innerText.trim().length === 0)
    Parents.forEach(Ele => PlaceHolderCandidated.add(Ele))
  })
  console.debug(`[${UserscriptName}] ${EventParameter.type} PlaceHolderCandidated`, PlaceHolderCandidated, EventParameter);
  [...PlaceHolderCandidated].forEach(Ele => {
    Ele.style.setProperty('display', 'none', 'important')
  })
}

ArticleHTMLElement.addEventListener('vue:settled', (EventParameter) => Handler(EventParameter))
ArticleHTMLElement.addEventListener('vue:url-changed', (EventParameter) => setTimeout(() => Handler(EventParameter), 250))
ArticleHTMLElement.addEventListener('vue:black-blank', (EventParameter) => setTimeout(() => Handler(EventParameter), 1500))

// init Naver Nanum fonts
const FontAddr = [
  'https://fonts.googleapis.com/css2?family=Nanum Gothic&display=swap',
]
FontAddr.forEach(Addr => {
  const Link = Win.document.createElement('link')
  Link.rel = 'stylesheet'
  Link.href = Addr
  Win.document.head.appendChild(Link)
})