// ==UserScript==
// @name         FuckAds - A Youtube pub skipper
// @namespace    http://tampermonkey.net/
// @version      4.7.1
// @description  Automatically skips YouTube ads and mutes/unmutes video for Firefox (quickly tested) and Opera (extensively tested).
// @author       John Doe
// @match        *://www.youtube.com/*
// @grant        none
// @license      MIT
// @downloadURL none
// ==/UserScript==

(function () {
  const player = document.getElementById('movie_player')
  const messageDiv = document.createElement('div')
  document.body.appendChild(messageDiv)
  messageDiv.style.cssText = 'position: fixed; top: 50%; left: 0; background: red; color: white; padding: 10px; z-index: 999;'

  let adSkipped = false

  function skipAd () {
    const skipButton = document.querySelector('.ytp-ad-skip-button-text')
    if (player && skipButton && !adSkipped) {
      skipButton.click()
      adSkipped = true
      player.unMute()
      player.style.zIndex = '999'
      player.seekTo(0)
      player.playVideo()
    }
  }

  function startObserving () {
    if (!player) {
      messageDiv.innerText = 'Player not detected'
      return
    }

    if (player.classList.contains('ad-showing')) {
      const skipButton = document.querySelector('.ytp-ad-skip-button-text')
      if (!skipButton) {
        messageDiv.innerText = 'Player and ad detected, no skip button available so you need to wait'
        player.mute()
        player.style.zIndex = '-999'
      } else {
        messageDiv.innerText = 'Player and ad detected'
        skipAd()
      }
    } else {
      messageDiv.innerText = 'No ad detected'
      player.unMute()
      player.style.zIndex = '999'
      if (player.getPlayerState() !== 1 && location.href.includes('/watch')) {
        player.seekTo(0)
        player.playVideo()
      }
    }
  }

  function checkUrlChange () {
    if (location.href.includes('/watch') && !adSkipped) {
      adSkipped = false
      startObserving()
    }
  }

  setInterval(checkUrlChange, 1000) // Continuously check for URL change
  setInterval(startObserving, 1000) // Continuously check for ad
})()