/* Учебный чемпионат. Расчёт повторяет шкалу Irish points текущего сайта. */
(function (document) {
    'use strict';

    var demo = document.querySelector('[data-home-demo]');
    var inputTable = demo && demo.querySelector('[data-demo-champ-inputs]');
    if (!inputTable || inputTable.getAttribute('data-initialized') === '1') {
        return;
    }
    inputTable.setAttribute('data-initialized', '1');

    var protocol = demo.querySelector('[data-demo-champ-protocol]');
    var openButton = demo.querySelector('[data-demo-champ-open]');
    var statuses = Array.prototype.slice.call(demo.querySelectorAll('[data-demo-champ-status]'));
    var inputs = Array.prototype.slice.call(inputTable.querySelectorAll('[data-demo-champ-mark]'));
    var grid = [100, 75, 65, 60, 56, 53, 50, 47, 45, 43];

    function setStatus(kind) {
        statuses.forEach(function (status) {
            status.textContent = status.getAttribute('data-' + kind);
        });
    }
    function markDirty() {
        setStatus('dirty');
        openButton.disabled = true;
        [inputTable, protocol].forEach(function (table) {
            Array.prototype.forEach.call(table.querySelectorAll('[data-demo-champ-total], [data-demo-champ-points], [data-demo-champ-place], [data-demo-champ-combined], [data-demo-champ-round-mark]'), function (cell) {
                cell.textContent = '—';
            });
        });
    }
    function calculate() {
        var invalid = inputs.filter(function (input) {
            var failed = !input.checkValidity() || !isFinite(parseFloat(input.value));
            input.setAttribute('aria-invalid', failed ? 'true' : 'false');
            return failed;
        });
        if (invalid.length) {
            setStatus('invalid');
            invalid[0].focus();
            return;
        }
        var records = Array.prototype.map.call(inputTable.querySelectorAll('[data-demo-champ-number]'), function (row) {
            var totals = [0, 0, 0];
            var rounds = [[], [], []];
            Array.prototype.forEach.call(row.querySelectorAll('[data-demo-champ-mark]'), function (input) {
                // Целые сотые исключают погрешность сравнения одинаковых сумм.
                var judge = Number(input.getAttribute('data-judge'));
                var mark = Math.round(Number(input.value) * 100);
                totals[judge] += mark;
                rounds[judge][Number(input.getAttribute('data-round'))] = mark;
            });
            return { number: row.getAttribute('data-demo-champ-number'), totals: totals, rounds: rounds, points: [0, 0, 0], combined: 0 };
        });
        for (var judge = 0; judge < 3; judge++) {
            var order = records.slice().sort(function (first, second) {
                return second.totals[judge] - first.totals[judge];
            });
            var start = 0;
            while (start < order.length) {
                var end = start + 1;
                while (end < order.length && order[end].totals[judge] === order[start].totals[judge]) {
                    end++;
                }
                var sum = 0;
                for (var index = start; index < end; index++) {
                    sum += grid[index];
                }
                var points = Math.round(sum / (end - start) * 100);
                for (var index = start; index < end; index++) {
                    order[index].points[judge] = points;
                }
                start = end;
            }
        }
        records.forEach(function (record) {
            record.combined = record.points.reduce(function (sum, value) { return sum + value; }, 0);
            var row = protocol.querySelector('[data-demo-champ-number="' + record.number + '"]');
            for (var judge = 0; judge < 3; judge++) {
                row.querySelector('[data-demo-champ-total="' + judge + '"]').textContent = (record.totals[judge] / 100).toFixed(2);
                row.querySelector('[data-demo-champ-points="' + judge + '"]').textContent = (record.points[judge] / 100).toFixed(2);
                for (var round = 0; round < 3; round++) {
                    row.querySelector('[data-demo-champ-round-mark="' + judge + '-' + round + '"]').textContent = (record.rounds[judge][round] / 100).toFixed(1);
                }
            }
        });
        records.sort(function (first, second) {
            return second.combined - first.combined || Number(first.number) - Number(second.number);
        });
        var place = 0;
        var previous = null;
        records.forEach(function (record, index) {
            if (record.combined !== previous) {
                place = index + 1;
                previous = record.combined;
            }
            var row = protocol.querySelector('[data-demo-champ-number="' + record.number + '"]');
            row.querySelector('[data-demo-champ-place]').textContent = place;
            row.querySelector('[data-demo-champ-combined]').textContent = (record.combined / 100).toFixed(2);
            protocol.querySelector('tbody').appendChild(row);
        });
        openButton.disabled = false;
        setStatus('ready');
    }
    inputs.forEach(function (input) {
        input.addEventListener('input', markDirty);
    });
    demo.querySelector('[data-demo-champ-calculate]').addEventListener('click', calculate);
    openButton.addEventListener('click', function () {
        demo.querySelector('[data-demo-mode="1"]').click();
        demo.querySelector('[data-demo-slide="6"]').click();
    });
    calculate();
})(document);