// ==UserScript==
// @name         Amazon Video AutoSkip ADs
// @name:de         Amazon Video Automatisch Werbung überspringen
// @namespace    https://greasyfork.org/users/928242
// @version      0.5
// @description  Auto Skip Ads by watching Amazon Prime Video
// @description:de  Überspringt automatisch die Werbung beim ansehen von Videos auf Amazon Prime.
// @author       Kamikaze (https://github.com/Kamiikaze)
// @match        https://www.amazon.de/gp/video/detail/*
// @icon         https://www.google.com/s2/favicons?sz=64&domain=amazon.de
// @grant        none
// @license      MIT
// @downloadURL none
// ==/UserScript==


// Change to the text matching your language for the skip button
const skipAdButtonText = 'Überspringen'

// How often in X seconds to scan for ADs
const scanInterval = 3

// Start scanning again in X minutes after AD has been skipped
const delayScanInterval = 5


/* ! ! ! ! ! ! ! !

Dont change below!

! ! ! ! ! ! ! ! */


let checkForAds = ''
let skipAdContainer = ''
let skipAdEl = ''
let skipButtonEl = ''
const clp = '[Amazon AutoSkip Script] '

startAdScan()

// Main Function Scanning for ADs
async function scanForADs() {

    if (!isVideoPlaying()) return;

    console.log(clp + "Scanning for running AD..")

    skipAdEl = await getSkipAdElement()

    console.log(clp + "skipButtonEl:", skipAdEl)

    if (!skipAdEl) return

    console.log(clp + "Detected playing AD. Trying to skip..")

    skipAd()
}

// Skipping the AD and restart delayed Scanning
function skipAd() {
    setTimeout( () => {
        skipAdEl.click()
        console.log(clp + "Skipped AD")
        restartAdScan()
    }, 3000 )
}

// Checks if Video is played
function isVideoPlaying() {
    const videoContainer = document.querySelector("#dv-web-player")

    if (!videoContainer) return

    return videoContainer.classList.contains("dv-player-fullscreen")
}

// Finding SkipElement and returning it
async function getSkipAdElement() {
    skipAdContainer = document.querySelector("div.atvwebplayersdk-infobar-container > div > div:nth-child(3)")

    if (!skipAdContainer) return

    return await [...skipAdContainer.childNodes].find( (el) => {

        if (el.innerText == skipAdButtonText) {
            console.log(clp + "Found Skip-Button Element", el)
            console.log(clp + "Skip-Button Text:", el.innerText)

            return el
        }
    });
}

// Starting AdScan Interval
function startAdScan() {
    checkForAds = setInterval( () => { scanForADs() }, scanInterval * 1000 )
}

// Clearing Interval, Vars and delaying restart of scan
function restartAdScan() {
    clearInterval(checkForAds)

    checkForAds = ''
    skipAdContainer = ''
    skipAdEl = ''
    skipButtonEl = ''

    console.log(clp + `Restarting AdScan in ${delayScanInterval} Minutes.`)

    setTimeout( () => { startAdScan() }, delayScanInterval * 60 * 1000 )
}