// ==UserScript==
// @name         HotSLogs Extra Data
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  Adds extra columns to HotSLogs data tables
// @author       Jacques Marcotte
// @match        https://www.hotslogs.com/*
// @grant        none
// ==/UserScript==

(function() {
    window.addRoS = function() {
        var tables = $('table.rgMasterTable').filter(function(i, table) {
            var found_games_played = false;
            var found_win_percent = false;
            var found_ros = false;
            var header_cells = $(table).find('th');
            header_cells.each(function(i, cell) {
                var text = $(cell).text().trim();
                if (text.substr(0,12) == 'Games Played') {
                    found_games_played = true;
                }
                if (text == 'Win Percent') {
                    found_win_percent = true;
                }
                if (text == 'RoS Win %') {
                    found_ros = true;
                }
            });
            return found_games_played && found_win_percent && !found_ros;
        });

        tables.each(function(i,table) {
            var header_row = $(table).find('thead > tr');
            header_row.append('<th scope="col" class="rgHeader">RoS Win %</th>');

            var header_cells = $(table).find('th');
            var games_played_index = null;
            var win_percent_index = null;
            header_cells.each(function(i, cell) {
                var text = $(cell).text().trim();
                if (text.substr(0,12) == 'Games Played') {
                    games_played_index = i;
                }
                if (text == 'Win Percent') {
                    win_percent_index = i;
                }
            });

            var rows = $(table).find('tr.rgRow,tr.rgAltRow');
            rows.each(function(i,row) {
                var cells = $(row).find('td');
                var games_played = parseInt(cells.eq(games_played_index).text(),10);
                var win_percent = parseFloat(cells.eq(win_percent_index).text(),10);
                var RoS = (win_percent * games_played + 1 ) / (games_played + 2);
                var new_cell = document.createElement('td');
                new_cell.innerHTML = RoS.toFixed(2) + ' %';
                row.append(new_cell);
            });
        });
    }

    // Add a button to the page
    ros_cell = document.createElement('div');
    ros_cell.id = 'ros_cell';
    ros_cell.style = "position:fixed; bottom: 20px; left: 20px; font-size: 14px; cursor: pointer; font-weight: bold";
    ros_cell.innerHTML = "Add<BR>RoS";
    document.body.appendChild(ros_cell);
    $(ros_cell).click(window.addRoS);
})();