// ==UserScript==
// @name MAM Ratio Protect
// @namespace yyyzzz999
// @author yyyzzz999
// @description Prevents downloading based on resulting Ratio Loss due to forgetting to buy w/FL
// @include https://www.myanonamouse.net/t/*
// @version 1.54 (11/28/20)
// @grant none
// @run-at document-end
// @downloadURL none
// ==/UserScript==
// Many Thanks to GardenShade for advice and major code contributions!
/*jshint esversion: 6 */
// downloadURL:  https://greasyfork.org/en/scripts/416189-mam-ratio-protect


let DEBUG =0; // Debugging mode on (1) or off (0) added in (v1.54)

// The download text area
let dlBtn = document.getElementById("tddl");
// The unused label area above the download text
let dlLabel = document.querySelector("#download .torDetInnerTop");
// Would become ratio
   let rnew = 0; // FALSE
if (document.getElementById("ratio").textContent.split(" ")[1].match(/become/) ) {
    rnew = document.getElementById("ratio").textContent.split(" ")[2].replace(/,/g,""); // (v1.54)
// VIP expires date caused rdiff to be NaN in v1.53 bcause text crept in in v1.52
	}
if (DEBUG) console.log("rnew= " + rnew); 

//let rnew = document.getElementById("ratio").textContent.split("become ")[1].replace(/,/g,""); // broke w/On list for next FL pick
//let rnew = document.getElementById("ratio").textContent.match(/\d*\,?\d+\.\d+/)[0].replace(/,/g,"''); //breaks at 1,000,000bp
if (DEBUG) console.log("rnew= " + rnew); // For debugging
// Current ratio - Version 1.52 and earlier broke when a ratio has a comma
let rcur = document.getElementById("tmR").textContent.replace(/,/g,"");
if (DEBUG) console.log("rcur= " + rcur); // For debugging
// Seeding or downloading TRUE if "Actively Seeding" etc.
let seeding = document.getElementById('DLhistory');
if (DEBUG) console.log("seeding= " + seeding);

// Available FL wedges - for future use... (>v1.54)
// Only visible if set on MAM in Preferences, Style, Main Menu, Top Menu
//let wedgeAvail = document.getElementById('tmFW').textContent.split(":")[1].trim(); //only works if added to top menu
//if(wedgeAvail) console.log("wedgeAvail= " + wedgeAvail);
// ELSE try finding in drop downs with Rel XPath //a[contains(text(),'FL Wedges: ')] or
// CSS ul:nth-child(1) li.mmUserStats ul.hidden:nth-child(2) li:nth-child(7) > a:nth-child(1)
// let wedgeAvail = document.querySelector('[aria-labelledby="userMenu"] li:nth-of-type(7)').textContent.split(':')[1].trim();

//Hide banner on book pages if not using MAM+
//document.getElementById("msb").style.display = "none";

// Only run the code if the new ratio exists and we found the current one
if(rnew && rcur){
    let rdiff = rcur-rnew; // Loss in ratio after download (if error in old browser use var instead of let)
if (DEBUG) console.log("rdiff= " + rdiff); // For debugging

  if (seeding == null ) { // if NOT already seeding, downloading or VIP expires (v1.54) 
         dlLabel.innerHTML = `Ratio loss ${rdiff.toFixed(4)}`; //changed from toPrecision(5) (v1.54)
         dlLabel.style.fontWeight = "normal"; //To distinguish from BOLD Titles
  }

    // Change this number to your "trivial ratio loss" amount
    // These changes will always happen if the ratio conditions are met
    if(rdiff > 0.3){
        dlBtn.style.backgroundColor="SpringGreen";
        dlBtn.style.color="black";
    }

    // Change this number to your I never want to dl w/o FL ratio loss amount
    if(rdiff > 1){
        dlBtn.style.backgroundColor="Red";
        // Disable link to prevent download
//        dlBtn.style.pointerEvents="none";
//	Uncomment (remove //) above line to disable the download button
        // maybe hide the button, and add the Ratio Loss warning in its place?
        dlBtn.innerHTML = "FL Recommended";
        dlLabel.style.fontWeight = "bold";
    // Change this number to your "I need to think about using a FL ratio loss" amount
    }else if(rdiff > 0.5){
        dlBtn.style.backgroundColor="Orange";
    }
}