(function (window, document, $) {
    'use strict';

    if (!$) { return; }

    var settingsTimers = {};
    var observerStarted = false;

    function intValue(value, fallback) {
        var n = parseInt(value, 10);
        if (isNaN(n)) { return typeof fallback === 'number' ? fallback : 0; }
        return Math.max(0, n);
    }

    function pageText($page, key, fallback) {
        var value = $page.attr('data-text-' + key);
        return (typeof value === 'string' && value !== '') ? value : (fallback || '');
    }

    function rowSelector(categoryId, levelId, type) {
        return '.awards-row[data-row-type="' + type + '"][data-category-id="' + categoryId + '"][data-level-id="' + levelId + '"]';
    }

    function scopeKey($row) {
        return [
            $row.attr('data-scope-type') || 'category',
            intValue($row.attr('data-category-id')),
            intValue($row.attr('data-level-id')),
            intValue($row.attr('data-dance-id'))
        ].join(':');
    }

    function timerKey($page, $row) {
        return ($page.index('#awardsPage') + 1) + ':' + scopeKey($row);
    }

    function competitionsForRow($row) {
        var raw = $row.attr('data-competitions') || '[]';
        try {
            var parsed = JSON.parse(raw);
            return $.isArray(parsed) ? parsed : [];
        } catch (e) {
            return [];
        }
    }

    function emptyResult() {
        return { gold:0, silver:0, bronze:0, participation:0, cup_1:0, cup_2:0, cup_3:0 };
    }

    function addResult(target, source) {
        $.each(['gold','silver','bronze','participation','cup_1','cup_2','cup_3'], function (_, key) {
            target[key] += intValue(source[key]);
        });
        return target;
    }

    function readSettings($row) {
        return {
            cup_mode: $row.find('.awards-cup-mode').val() || 'none',
            team_medal_mode: $row.find('.awards-team-medal-mode').val() || 'placements',
            award_all: $row.find('.awards-award-all').is(':checked'),
            depth_mode: $row.find('.awards-depth-mode:checked').val() || 'fixed',
            fixed_places: Math.max(1, intValue($row.find('.awards-fixed-places').val(), 1)),
            threshold_entries: Math.max(1, intValue($row.find('.awards-threshold-entries').val(), 1)),
            threshold_low_places: Math.max(1, intValue($row.find('.awards-threshold-low').val(), 1)),
            threshold_high_places: Math.max(1, intValue($row.find('.awards-threshold-high').val(), 1))
        };
    }

    function writeSettings($row, settings) {
        $row.find('.awards-cup-mode').val(settings.cup_mode);
        $row.find('.awards-team-medal-mode').val(settings.team_medal_mode);
        $row.find('.awards-award-all').prop('checked', !!settings.award_all);
        $row.find('.awards-depth-mode[value="' + settings.depth_mode + '"]').prop('checked', true);
        $row.find('.awards-fixed-places').val(settings.fixed_places);
        $row.find('.awards-threshold-entries').val(settings.threshold_entries);
        $row.find('.awards-threshold-low').val(settings.threshold_low_places);
        $row.find('.awards-threshold-high').val(settings.threshold_high_places);
    }

    function isOverrideActive($row) {
        if (($row.attr('data-row-type') || '') === 'category') { return true; }
        return $row.find('.awards-override-enabled').is(':checked');
    }

    function updateDepthUI($row, rowActive) {
        var awardAll = $row.find('.awards-award-all').is(':checked');
        var mode = $row.find('.awards-depth-mode:checked').val() || 'fixed';
        var depthDisabled = !rowActive || awardAll;

        $row.find('.awards-all-toggle')
            .toggleClass('is-active', awardAll)
            .toggleClass('is-control-disabled', !rowActive);

        $row.find('.awards-depth-settings').toggleClass('is-disabled', depthDisabled);
        $row.find('.awards-depth-mode, .awards-fixed-places, .awards-threshold-entries, .awards-threshold-low, .awards-threshold-high')
            .prop('disabled', depthDisabled);

        $row.find('.awards-fixed-panel').toggleClass('is-hidden', mode !== 'fixed');
        $row.find('.awards-threshold-panel').toggleClass('is-hidden', mode !== 'threshold');
    }

    function setRowActivation($row, active) {
        var $page = $row.closest('#awardsPage');
        var rowType = $row.attr('data-row-type');

        $row.toggleClass('is-settings-disabled', !active);
        $row.toggleClass('is-inherited', !active);
        $row.toggleClass('has-override', active && rowType !== 'category');

        $row.find('.awards-cup-mode').prop('disabled', !active);
        if ($row.attr('data-is-team') === '1') {
            $row.find('.awards-team-medal-mode').prop('disabled', !active);
        }
        $row.find('.awards-award-all').prop('disabled', !active);

        var $override = $row.find('.awards-override-toggle');
        if ($override.length) {
            $override.toggleClass('is-active', active);
        }

        updateDepthUI($row, active);

        if (!active) {
            var inheritedText = rowType === 'dance'
                ? pageText($page, 'inherited-level', '')
                : pageText($page, 'inherited-category', '');
            $row.find('.awards-save-status').removeClass('is-saving is-saved is-error').text(inheritedText);
        }
    }

    function syncInheritance($page) {
        $page.find('.awards-category-row').each(function () {
            var $category = $(this);
            var categoryId = intValue($category.attr('data-category-id'));
            setRowActivation($category, true);
            var categorySettings = readSettings($category);

            $page.find(rowSelector(categoryId, 0, 'level').replace('[data-level-id="0"]','')).each(function () {
                /* This branch is intentionally unused; level rows are selected below. */
            });

            $page.find('.awards-level-row[data-category-id="' + categoryId + '"]').each(function () {
                var $level = $(this);
                var levelId = intValue($level.attr('data-level-id'));
                var levelActive = isOverrideActive($level);
                if (!levelActive) { writeSettings($level, categorySettings); }
                setRowActivation($level, levelActive);
                var levelEffective = readSettings($level);

                $page.find('.awards-dance-row[data-category-id="' + categoryId + '"][data-level-id="' + levelId + '"]').each(function () {
                    var $dance = $(this);
                    var danceActive = isOverrideActive($dance);
                    if (!danceActive) { writeSettings($dance, levelEffective); }
                    setRowActivation($dance, danceActive);
                });
            });
        });
    }

    function awardedPlaces(entries, settings) {
        entries = intValue(entries);
        if (!entries) { return 0; }
        if (settings.award_all) { return entries; }

        var places = settings.depth_mode === 'threshold'
            ? (entries <= settings.threshold_entries ? settings.threshold_low_places : settings.threshold_high_places)
            : settings.fixed_places;

        return Math.min(entries, Math.max(1, intValue(places, 1)));
    }

    function calculateLeaf($row) {
        var result = emptyResult();
        var settings = readSettings($row);
        var competitions = competitionsForRow($row);

        $.each(competitions, function (_, comp) {
            var entries = intValue(comp.entries);
            if (!entries) { return; }
            var awarded = awardedPlaces(entries, settings);
            if (!awarded) { return; }

            if (comp.type === 'team') {
                var teamSize = Math.max(1, intValue(comp.team_size, 1));
                if (settings.team_medal_mode === 'participation') {
                    result.participation += awarded * teamSize;
                } else {
                    if (awarded >= 1) { result.gold += teamSize; }
                    if (awarded >= 2) { result.silver += teamSize; }
                    if (awarded >= 3) { result.bronze += teamSize; }
                    if (awarded > 3) { result.participation += (awarded - 3) * teamSize; }
                }
                if ((settings.cup_mode === 'first' || settings.cup_mode === 'top3') && awarded >= 1) { result.cup_1 += 1; }
                if (settings.cup_mode === 'top3' && awarded >= 2) { result.cup_2 += 1; }
                if (settings.cup_mode === 'top3' && awarded >= 3) { result.cup_3 += 1; }
                return;
            }

            if (awarded >= 1) {
                if (settings.cup_mode === 'first' || settings.cup_mode === 'top3') { result.cup_1 += 1; }
                else { result.gold += 1; }
            }
            if (awarded >= 2) {
                if (settings.cup_mode === 'top3') { result.cup_2 += 1; }
                else { result.silver += 1; }
            }
            if (awarded >= 3) {
                if (settings.cup_mode === 'top3') { result.cup_3 += 1; }
                else { result.bronze += 1; }
            }
            if (awarded > 3) { result.participation += awarded - 3; }
        });

        return result;
    }

    function writeResult($row, result) {
        $row.find('.awards-gold').text(intValue(result.gold));
        $row.find('.awards-silver').text(intValue(result.silver));
        $row.find('.awards-bronze').text(intValue(result.bronze));
        $row.find('.awards-participation').text(intValue(result.participation));
        $row.find('.awards-cup-1').text(intValue(result.cup_1));
        $row.find('.awards-cup-2').text(intValue(result.cup_2));
        $row.find('.awards-cup-3').text(intValue(result.cup_3));
    }

    function resultFromRow($row) {
        return {
            gold: intValue($row.find('.awards-gold').text()),
            silver: intValue($row.find('.awards-silver').text()),
            bronze: intValue($row.find('.awards-bronze').text()),
            participation: intValue($row.find('.awards-participation').text()),
            cup_1: intValue($row.find('.awards-cup-1').text()),
            cup_2: intValue($row.find('.awards-cup-2').text()),
            cup_3: intValue($row.find('.awards-cup-3').text())
        };
    }

    function escapeHtml(value) {
        return $('<div>').text(value == null ? '' : value).html();
    }

    function breakdownHtml($page, items) {
        if (!items.length) {
            return '<div class="awards-summary-empty">' + escapeHtml(pageText($page, 'no-cups', 'No cups')) + '</div>';
        }
        var html = '';
        $.each(items, function (_, item) {
            html += '<div class="awards-summary-line"><span>' + escapeHtml(item.label) + '</span><strong>' + item.value + '</strong></div>';
        });
        return html;
    }

    function recalculateAll($page) {
        if (!$page || !$page.length) { return; }
        syncInheritance($page);

        var totals = emptyResult();
        var cups = {1:[],2:[],3:[]};

        /* 1. Calculate every leaf. */
        $page.find('.awards-row[data-is-leaf="1"]').each(function () {
            var $leaf = $(this);
            var r = calculateLeaf($leaf);
            writeResult($leaf, r);
            addResult(totals, r);

            var label = $leaf.attr('data-award-label') || pageText($page, 'category', 'Category');
            if (r.cup_1 > 0) { cups[1].push({label:label,value:r.cup_1}); }
            if (r.cup_2 > 0) { cups[2].push({label:label,value:r.cup_2}); }
            if (r.cup_3 > 0) { cups[3].push({label:label,value:r.cup_3}); }
        });

        /* 2. Aggregate non-leaf levels from their dance children. */
        $page.find('.awards-level-row[data-is-leaf="0"]').each(function () {
            var $level = $(this);
            var categoryId = intValue($level.attr('data-category-id'));
            var levelId = intValue($level.attr('data-level-id'));
            var sum = emptyResult();
            $page.find('.awards-dance-row[data-category-id="' + categoryId + '"][data-level-id="' + levelId + '"]').each(function () {
                addResult(sum, resultFromRow($(this)));
            });
            writeResult($level, sum);
        });

        /* 3. Aggregate categories from their levels. */
        $page.find('.awards-category-row').each(function () {
            var $category = $(this);
            var categoryId = intValue($category.attr('data-category-id'));
            var sum = emptyResult();
            $page.find('.awards-level-row[data-category-id="' + categoryId + '"]').each(function () {
                addResult(sum, resultFromRow($(this)));
            });
            writeResult($category, sum);
        });

        var totalMedals = totals.gold + totals.silver + totals.bronze + totals.participation;
        $page.find('#awardsSummaryGold').text(totals.gold);
        $page.find('#awardsSummarySilver').text(totals.silver);
        $page.find('#awardsSummaryBronze').text(totals.bronze);
        $page.find('#awardsSummaryParticipation').text(totals.participation);
        $page.find('#awardsSummaryMedals').text(totalMedals);

        $.each([1,2,3], function (_, place) {
            var cupTotal = 0;
            $.each(cups[place], function (_, item) { cupTotal += item.value; });
            $page.find('#awardsSummaryCup' + place).text(cupTotal);
            $page.find('#awardsCup' + place + 'Breakdown').html(breakdownHtml($page, cups[place]));
        });
    }

    function setRowStatus($row, state, text) {
        var $status = $row.find('.awards-save-status');
        $status.removeClass('is-saving is-saved is-error');
        if (state) { $status.addClass('is-' + state); }
        $status.text(text || '');
    }

    function saveSettings($page, $row) {
        var rowType = $row.attr('data-row-type') || 'category';
        var overrideEnabled = rowType === 'category' ? 1 : ($row.find('.awards-override-enabled').is(':checked') ? 1 : 0);
        var settings = readSettings($row);

        setRowStatus($row, 'saving', pageText($page, 'saving', 'Saving...'));

        return $.ajax({
            url: $page.attr('data-actions-url') || 'actions.php',
            type: 'POST',
            dataType: 'json',
            data: {
                action: 'save_award_scope_settings',
                scope_type: $row.attr('data-scope-type') || rowType,
                category_id: intValue($row.attr('data-category-id')),
                level_id: intValue($row.attr('data-level-id')),
                dance_id: intValue($row.attr('data-dance-id')),
                override_enabled: overrideEnabled,
                cup_mode: settings.cup_mode,
                team_medal_mode: settings.team_medal_mode,
                award_all: settings.award_all ? 1 : 0,
                depth_mode: settings.depth_mode,
                fixed_places: settings.fixed_places,
                threshold_entries: settings.threshold_entries,
                threshold_low_places: settings.threshold_low_places,
                threshold_high_places: settings.threshold_high_places
            }
        }).done(function (response) {
            if (response && response.ok) {
                setRowStatus($row, 'saved', pageText($page, 'saved', 'Saved'));
            } else {
                setRowStatus($row, 'error', (response && response.error) || pageText($page, 'save-failed', 'Save failed'));
            }
        }).fail(function (xhr) {
            var error = pageText($page, 'save-failed', 'Save failed');
            if (xhr.responseJSON && xhr.responseJSON.error) { error = xhr.responseJSON.error; }
            setRowStatus($row, 'error', error);
        });
    }

    function scheduleSave($page, $row) {
        var key = timerKey($page, $row);
        clearTimeout(settingsTimers[key]);
        setRowStatus($row, 'saving', pageText($page, 'changed', 'Changed...'));
        settingsTimers[key] = setTimeout(function () { saveSettings($page, $row); }, 450);
    }

    function normalizeNumericInput($input) {
        if ($input.val() === '') { return; }
        $input.val(Math.max(1, intValue($input.val(), 1)));
    }

    function toggleCategory($page, $row) {
        var categoryId = intValue($row.attr('data-category-id'));
        var $button = $row.find('.awards-category-toggle');
        var expanded = $button.attr('aria-expanded') === 'true';
        expanded = !expanded;
        $button.attr('aria-expanded', expanded ? 'true' : 'false');
        $row.toggleClass('is-expanded', expanded);
        $row.find('.awards-category-chevron').html(expanded ? '&#9662;' : '&#9656;');
        $row.find('.awards-toggle-caption').text(pageText($page, expanded ? 'hide-levels' : 'show-levels', ''));

        $page.find('.awards-level-row[data-category-id="' + categoryId + '"]').toggleClass('is-hidden-row', !expanded);

        if (!expanded) {
            $page.find('.awards-level-row[data-category-id="' + categoryId + '"]').removeClass('is-expanded');
            $page.find('.awards-level-row[data-category-id="' + categoryId + '"] .awards-level-toggle').attr('aria-expanded','false');
            $page.find('.awards-level-row[data-category-id="' + categoryId + '"] .awards-level-chevron').html('&#9656;');
            $page.find('.awards-level-row[data-category-id="' + categoryId + '"] .awards-toggle-caption').text(pageText($page,'show-dances',''));
            $page.find('.awards-dance-row[data-category-id="' + categoryId + '"]').addClass('is-hidden-row');
        }
    }

    function toggleLevel($page, $row) {
        var categoryId = intValue($row.attr('data-category-id'));
        var levelId = intValue($row.attr('data-level-id'));
        var $button = $row.find('.awards-level-toggle');
        var expanded = $button.attr('aria-expanded') === 'true';
        expanded = !expanded;
        $button.attr('aria-expanded', expanded ? 'true' : 'false');
        $row.toggleClass('is-expanded', expanded);
        $row.find('.awards-level-chevron').html(expanded ? '&#9662;' : '&#9656;');
        $row.find('.awards-toggle-caption').text(pageText($page, expanded ? 'hide-dances' : 'show-dances', ''));
        $page.find('.awards-dance-row[data-category-id="' + categoryId + '"][data-level-id="' + levelId + '"]').toggleClass('is-hidden-row', !expanded);
    }

    function bindDelegatedEvents() {
        $(document)
            .off('.awardsPlanner')
            .on('click.awardsPlanner', '#awardsPage .awards-category-toggle', function (e) {
                e.preventDefault();
                var $row = $(this).closest('.awards-category-row');
                toggleCategory($row.closest('#awardsPage'), $row);
            })
            .on('click.awardsPlanner', '#awardsPage .awards-level-toggle', function (e) {
                e.preventDefault();
                var $row = $(this).closest('.awards-level-row');
                toggleLevel($row.closest('#awardsPage'), $row);
            })
            .on('change.awardsPlanner', '#awardsPage .awards-override-enabled', function () {
                var $row = $(this).closest('.awards-row');
                var $page = $row.closest('#awardsPage');
                recalculateAll($page);
                scheduleSave($page, $row);
            })
            .on('input.awardsPlanner change.awardsPlanner', '#awardsPage .awards-setting-input', function () {
                var $input = $(this);
                var $row = $input.closest('.awards-row');
                var $page = $row.closest('#awardsPage');
                if ($input.is('[type="number"]')) { normalizeNumericInput($input); }
                recalculateAll($page);
                scheduleSave($page, $row);
            })
            .on('click.awardsPlanner', '#awardsPage #awardsSaveAll', function () {
                var $button = $(this);
                var $page = $button.closest('#awardsPage');
                var originalText = $button.text();
                var requests = [];
                recalculateAll($page);
                $button.prop('disabled', true).text(pageText($page, 'saving', 'Saving...'));
                $page.find('.awards-row').each(function () {
                    requests.push(saveSettings($page, $(this)));
                });
                $.when.apply($, requests).always(function () {
                    $button.prop('disabled', false).text(originalText);
                });
            });
    }

    function initPage($page) {
        if (!$page || !$page.length) { return; }
        recalculateAll($page);
    }

    function initAll() {
        $('#awardsPage').each(function () { initPage($(this)); });
    }

    function startObserver() {
        if (observerStarted || !window.MutationObserver || !document.body) { return; }
        observerStarted = true;
        new MutationObserver(function (mutations) {
            var found = false;
            $.each(mutations, function (_, mutation) {
                $.each(mutation.addedNodes || [], function (_, node) {
                    if (node.nodeType !== 1) { return; }
                    if ($(node).is('#awardsPage') || $(node).find('#awardsPage').length) { found = true; }
                });
            });
            if (found) { initAll(); }
        }).observe(document.body, {childList:true, subtree:true});
    }

    bindDelegatedEvents();
    $(function () { initAll(); startObserver(); });

    window.AwardsPlanner = {
        init: initAll,
        recalculateAll: function () { $('#awardsPage').each(function () { recalculateAll($(this)); }); }
    };

})(window, document, window.jQuery);