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// ==UserScript==
// @name        deckboxCMC
// @match       https://deckbox.org/sets/*
// @description Calculates CMC in deckbox sets
// @version     0.6.1
// ==/UserScript==

// Function to append a new DOM element after another
function insertAfter(newNode, referenceNode) {
    referenceNode.parentNode.insertBefore(newNode, referenceNode.nextSibling);
}

// Initialize array and hash to hold mana costs
var manaCosts = {};
var totalCosts = [];

// Iterate through rows to get mana cost totals for each card
var x = document.getElementsByClassName("mtg_mana");
//console.log("mtg_mana element count: " + x.length);


for (i = 0; i < x.length; i++) {
    var re = /mtg_mana_[0-9URGBWCX]{1,2}/i;
    //console.log("This is a mana cost item: " + x[i].outerHTML);
    var row = x[i].parentElement.parentElement.id;
    //console.log("Parent element is " + row);
    //console.log("Card element looks like this: " + document.getElementById(row).innerHTML);
    var cardName = document.getElementById(row).innerHTML.match(/(?:a class="simple" href="https:\/\/deckbox\.org\/mtg\/.*" target="_blank">)(.*)(?:<\/a>)/)[1];
    //console.log("Card name is " + cardName);
    var stripped = x[i].outerHTML.match(re).toString();
    //console.log("This its stripped mana name: " + stripped);
    var strippedMore = stripped.replace("mtg_mana_", "");
    //console.log("Mana cost indicated: " + strippedMore);
    var converted = strippedMore.replace(/[URGBWC]([URGBWC])?/, "1");
    converted = converted.replace(/X/, "0");

    if (!manaCosts[row]) {
        //console.log("Adding new item to manaCosts hash for card " + cardName);
        //console.log("Found mana cost " + converted + " for card " + cardName);
        manaCosts[row] = Number(converted);
    } else {
        manaCosts[row] += Number(converted);
        //console.log("Found mana cost " + converted + " for card " + cardName);
    }
    //console.log("Total mana cost for " + cardName + " is " + manaCosts[row]);
}

// Summary of card costs by table row
//console.log("Here's what we found in the main deck: ");
for (var card in manaCosts) {
    // use hasOwnProperty to filter out keys from the Object.prototype
    if (manaCosts.hasOwnProperty(card)) {
        cardName = document.getElementById(card).innerHTML.match(/(?:a class="simple" href="https:\/\/deckbox\.org\/mtg\/.*" target="_blank">)(.*)(?:<\/a>)/)[1];
        if (document.getElementById(card).innerHTML.indexOf("wishlist") !== -1) {
            //console.log("Deck list has a wishlist.  I think this is YOUR deck.");
            var cardCount = document.getElementById(card).innerHTML.match(/(?:<td class="card_count deck_count.*>(\n)?)([0-9]{1,2})(?:(\n)?<\/td>\n<script>)/);
            cardCount = Number(cardCount[2]);
            //console.log("Raw cardCount is " + cardCount);
            //console.log("I think there are " + cardCount + " copies of " + cardName);
        } else {
            //console.log("Deck list DOESN'T have a wishlist.  I think this is someone elses deck.");
            cardCount = document.getElementById(card).innerHTML.match(/(?:<td class="card_count">)([0-9]*)(?:<\/td>\n<td class="card_name">)/)[1];
            //console.log("I think there are " + cardCount + " copies of " + cardName);
        }
        if (document.getElementById(card).innerHTML.indexOf("main") !== -1) {
            //console.log(cardCount + " copies of " + cardName + " (" + manaCosts[card] + ")");
            for (var i = 0; i < cardCount; i++) {
                //console.log("Adding mana cost " + manaCosts[card] + " for card " + cardName + " to the total.");
                totalCosts.push(manaCosts[card]);
            }
        } else {
            //console.log("Card " + cardName + " with value of " + card + " is not in main deck.  Will NOT use to calculate CMC average.");
        }
    }
}

// Get average
var total = 0;
//console.log("Found " + totalCosts.length + " cards in the main deck.");
for (var i = 0; i < totalCosts.length; i++) {
    //console.log("Adding mana cost number " + i + " to the total.");
    total += totalCosts[i];
    //console.log("Total is now: " + total);
}
//console.log("Dividing total mana cost of " + total + " by " + totalCosts.length + " total cards to find the average.");
var avg = total / totalCosts.length;
//console.log("Agerage CMC: " + avg);

// Create element with average CMC
var ElCMC = document.createElement('div');
ElCMC.id = 'avg_cmc';
ElCMC.style.textAlign = 'center';
ElCMC.style.fontSize = '10px';
ElCMC.style.color = '#484848';
ElCMC.textContent = "Average CMC: " + avg.toFixed(2);

// Insert the element after the mana curve chart
var ref = document.querySelector('#chart_curve');
insertAfter(ElCMC, ref);