(function ($) {
    'use strict';

    function create(root, tools) {
        var config = JSON.parse(root.querySelector('.fi-visitor-audience-config').textContent);
        var feis = Number(root.dataset.feisId);
        var storageKey = 'fi-visitor-favorites-' + feis;
        var favorites = [];
        var information = null;
        var informationRequest = null;
        var scheduleReady = false;
        var scheduleError = false;
        var schedule = root.querySelector('[data-schedule-content]');
        try {
            var stored = JSON.parse(localStorage.getItem(storageKey) || '[]');
            if (Array.isArray(stored)) {
                favorites = stored.map(Number).filter(function (id, index, all) {
                    return Number.isSafeInteger(id) && id > 0 && all.indexOf(id) === index;
                });
            }
        } catch (error) { favorites = []; }

        function url(path) {
            return path + '?event=' + feis;
        }

        function syncStars() {
            $(root).find('[data-favorite-user]').each(function () {
                var selected = favorites.indexOf(Number(this.dataset.favoriteUser)) !== -1;
                $(this).toggleClass('is-selected', selected).attr('aria-pressed', String(selected))
                    .attr('aria-label', selected ? config.remove : config.add).text(selected ? '★' : '☆');
            });
            $(root).find('[data-favorites-count]').text(favorites.length);
        }

        function star(id) {
            return $('<button type="button" class="fi-visitor-star">')
                .attr('data-favorite-user', id).attr('aria-label', config.add).attr('aria-pressed', 'false').text('☆');
        }

        function getInformation() {
            if (informationRequest) { return informationRequest; }
            informationRequest = $.ajax({url:url('/visitor/information.php'),dataType:'json',cache:false,timeout:20000});
            informationRequest.done(function (data) {
                information = data;
                var select = root.querySelector('[data-school-filter]');
                (data.schools || []).slice().sort(function (a, b) {
                    return String(a.name).localeCompare(String(b.name), root.dataset.language);
                }).forEach(function (school) {
                    $('<option>').val(school.id).text(school.name).appendTo(select);
                });
            }).fail(function () { informationRequest = null; });
            return informationRequest;
        }

        function stateBadge(status) {
            return $('<span class="fi-visitor-competition-status">').addClass('is-' + status)
                .text(status === 'past' ? config.past : config.current);
        }

        function formatTime(minutes) {
            if (minutes === null || !Number.isFinite(minutes)) { return config.noTime; }
            return '≈ ' + String(Math.floor(minutes / 60) % 24).padStart(2, '0')
                + ':' + String(minutes % 60).padStart(2, '0');
        }

        function duration(category, dance, total) {
            var rules = {
                1: [Number(dance) <= 4 ? 50 : 70, 1, 2],
                2: [40, 1, 1], 3: [90, 1, 2], 4: [160, 3, 2],
                5: [40, 1, 1], 6: [130, 1, 1], 7: [120, 1, 2], 8: [150, 1, 1]
            };
            var rule = rules[category];
            if (!total) { return 0; }
            return rule ? Math.round(total * rule[1] / rule[2] * rule[0] / 60) + 1 : null;
        }

        function calculateTimes(data, counts) {
            var rows = {};
            (data.competitions || []).forEach(function (competition) {
                var key = Number(competition.hall) + ':' + Number(competition.row);
                if (!rows[key]) { rows[key] = {hall:Number(competition.hall),row:Number(competition.row),competitions:[],technical:[]}; }
                rows[key].competitions.push(competition);
            });
            (data.technical || []).forEach(function (technical) {
                var key = Number(technical.hall) + ':' + Number(technical.row);
                if (!rows[key]) { rows[key] = {hall:Number(technical.hall),row:Number(technical.row),competitions:[],technical:[]}; }
                rows[key].technical.push(technical);
            });
            var cursors = {}, result = {};
            Object.keys(rows).map(function (key) { return rows[key]; }).sort(function (a, b) {
                return a.hall - b.hall || a.row - b.row;
            }).forEach(function (row) {
                if (!Object.prototype.hasOwnProperty.call(cursors, row.hall)) { cursors[row.hall] = null; }
                row.technical.forEach(function (technical) {
                    if (technical.break_type === 'Day End') {
                        cursors[row.hall] = null;
                    } else if (technical.type === 'timetable_time') {
                        var hour = Number(technical.man_time_hour), minute = Number(technical.man_time_min);
                        if (hour >= 0 && hour < 24 && minute >= 0 && minute < 60) {
                            cursors[row.hall] = hour * 60 + minute;
                        }
                    }
                });
                var longest = 0;
                row.competitions.forEach(function (competition) {
                    result[competition.id] = cursors[row.hall];
                    var estimate = duration(Number(competition.category_id), Number(competition.dance_id), counts[competition.id] || 0);
                    if (estimate === null) { longest = null; }
                    else if (longest !== null) { longest = Math.max(longest, estimate); }
                });
                if (cursors[row.hall] !== null) {
                    cursors[row.hall] = longest === null ? null : cursors[row.hall] + longest;
                }
            });
            return result;
        }

        function updateSummary(block) {
            $(block).children('summary').children('.fi-visitor-block-time, .fi-visitor-competition-status').remove();
            var stages = $(block).find('.fi-visitor-stage').get().filter(function (stage) { return !stage.hidden; });
            var starts = stages.map(function (stage) {
                return stage.dataset.startMinutes === '' || stage.dataset.startMinutes === undefined
                    ? null : Number(stage.dataset.startMinutes);
            }).filter(function (time) { return time !== null; });
            $('<time class="fi-visitor-block-time">').attr('title', config.estimated)
                .text(formatTime(starts.length ? Math.min.apply(null, starts) : null))
                .insertBefore($(block).children('summary').find('.fi-visitor-chevron'));
            var statuses = stages.map(function (stage) { return stage.dataset.competitionStatus; });
            var status = statuses.indexOf('current') !== -1 ? 'current'
                : (statuses.length && statuses.every(function (value) { return value === 'past'; }) ? 'past' : '');
            if (status) { stateBadge(status).insertBefore($(block).children('summary').find('.fi-visitor-chevron')); }
        }

        function competitionStatuses(competitions) {
            var statuses = {}, completedRows = {};
            competitions.forEach(function (competition) {
                var key = String(competition.hall) + ':' + Number(competition.col);
                var status = Number(competition.has_results) ? 'past'
                    : (Number(competition.submitted) > 0 ? 'current' : '');
                statuses[competition.id] = status;
                if (status === 'past') {
                    var row = Number(competition.row);
                    if (completedRows[key] === undefined || row > completedRows[key]) {
                        completedRows[key] = row;
                    }
                }
            });
            competitions.forEach(function (competition) {
                var key = String(competition.hall) + ':' + Number(competition.col);
                if (Number(competition.row) < completedRows[key]) {
                    statuses[competition.id] = 'past';
                }
            });
            return statuses;
        }

        function decorateSchedule(data) {
            scheduleReady = true;
            scheduleError = false;
            var metadata = {}, counts = {}, stageOptions = {}, halls = {};
            (data.competitions || []).forEach(function (competition) {
                metadata[competition.id] = competition;
                halls[Number(competition.hall)] = true;
            });
            $(schedule).find('.fi-visitor-stage').each(function () {
                var stage = this, id = Number(stage.dataset.compId), competition = metadata[id];
                var ids = {};
                $(stage).find('tr[data-person-id]').each(function () { ids[this.dataset.personId] = true; });
                counts[id] = competition && Number(competition.category_id) === 6
                    ? $(stage).find('.fi-visitor-team-number').length : Object.keys(ids).length;
            });
            var times = calculateTimes(data, counts);
            var statuses = competitionStatuses(data.competitions || []);
            $(schedule).find('.fi-visitor-stage').each(function () {
                var stage = this, competition = metadata[Number(stage.dataset.compId)];
                if (competition) {
                    stage.dataset.stageKey = Number(competition.hall) + ':' + Number(competition.col);
                    var label = $(stage).find('header > span').first().text();
                    if (Object.keys(halls).length > 1) {
                        label = (root.dataset.language === 'ru' ? 'Зал ' : 'Hall ') + competition.hall + ' · ' + label;
                    }
                    $(stage).find('header > span').first().text(label);
                    stageOptions[stage.dataset.stageKey] = label;
                    var status = statuses[competition.id];
                    stage.dataset.competitionStatus = status;
                    if (status) { stateBadge(status).appendTo($(stage).find('header')); }
                    stage.dataset.startMinutes = times[competition.id] === null ? '' : times[competition.id];
                    $('<time class="fi-visitor-stage-time">').attr('title', config.estimated)
                        .text(formatTime(times[competition.id])).insertAfter($(stage).find('header'));
                }
                $(stage).find('tr[data-person-id]').each(function () {
                    var id = Number(this.dataset.personId);
                    if (id > 0) { star(id).prependTo($(this).children('td').first()); }
                });
            });
            var stageSelect = root.querySelector('[data-stage-filter]');
            $(stageSelect).find('option:not(:first)').remove();
            Object.keys(stageOptions).sort().forEach(function (key) {
                $('<option>').val(key).text(stageOptions[key]).appendTo(stageSelect);
            });
            $(schedule).find('details').each(function () { updateSummary(this); });
            syncStars();
            getInformation().done(function () { tools.filterSchedule(); });
            renderFavorites();
        }

        function filterSchedule(query) {
            var school = root.querySelector('[data-school-filter]').value;
            var selectedStage = root.querySelector('[data-stage-filter]').value;
            var visibleBlocks = 0;
            $(schedule).find('details.fi-visitor-block').each(function () {
                var block = this, found = false;
                $(block).find('.fi-visitor-stage').each(function () {
                    var stage = this;
                    var stageAllowed = !selectedStage || stage.dataset.stageKey === selectedStage;
                    var headerMatches = $(block).children('summary').text().toLocaleLowerCase().indexOf(query) !== -1
                        || $(stage).children('header, .fi-visitor-age').text().toLocaleLowerCase().indexOf(query) !== -1;
                    var anyRow = false, teamHeader = null;
                    $(stage).find('tbody > tr').each(function () {
                        if ($(this).hasClass('fi-visitor-team-number')) {
                            teamHeader = this;
                            this.hidden = true;
                            return;
                        }
                        var visible = stageAllowed && (!school || this.dataset.schoolId === school)
                            && (!query || headerMatches || $(this).text().toLocaleLowerCase().indexOf(query) !== -1);
                        this.hidden = !visible;
                        if (visible) {
                            anyRow = true;
                            if (teamHeader) { teamHeader.hidden = false; }
                        }
                    });
                    stage.hidden = !stageAllowed || (!anyRow && (!!school || !!query));
                    if (!stage.hidden) { found = true; }
                });
                block.hidden = !found;
                updateSummary(block);
                if (found) {
                    visibleBlocks++;
                    if (query || school || selectedStage) { block.open = true; }
                }
            });
            $(schedule).find('.fi-visitor-break').prop('hidden', !!query || !!school || !!selectedStage);
            $(schedule).find('[data-schedule-no-matches]').prop('hidden', visibleBlocks !== 0);
        }

        function renderFavorites() {
            var content = root.querySelector('[data-favorite-content]');
            $(content).empty();
            if (!favorites.length) {
                $('<p class="fi-visitor-message">').text(config.empty).appendTo(content);
                return;
            }
            if (!information) {
                $('<p class="fi-visitor-message">').text(config.loading).appendTo(content);
                getInformation().done(renderFavorites).fail(function () { $(content).text(config.error); });
                return;
            }
            favorites.forEach(function (id) {
                var person = information.people.find(function (candidate) { return Number(candidate.id) === id; });
                var card = $('<article class="fi-visitor-favorite-card">').appendTo(content);
                var heading = $('<header>').append(star(id)).appendTo(card);
                if (person && person.number !== null && person.number !== '') {
                    $('<span class="fi-visitor-number">').text(String(person.number).padStart(3, '0')).appendTo(heading);
                }
                $('<strong>').text(person ? person.name : config.unknownPerson).appendTo(heading);
                if (person) {
                    $('<p>').text(information.schools.filter(function (school) {
                        return person.schools.indexOf(Number(school.id)) !== -1;
                    }).map(function (school) { return school.name; }).join(' · ')).appendTo(card);
                }
                var entries = {}, list = $('<ul>').appendTo(card);
                $(schedule).find('tr[data-person-id="' + id + '"]').each(function () {
                    var stage = this.closest('.fi-visitor-stage');
                    var key = stage.dataset.compId;
                    if (entries[key]) { return; }
                    entries[key] = true;
                    var block = stage.closest('details');
                    var row = $('<li>').appendTo(list);
                    $('<strong>').text($(block).children('summary').find('strong').text()).appendTo(row);
                    $('<span>').text($(stage).children('header').children().map(function () { return $(this).text(); }).get().join(' · ') + ' · ' + $(stage).children('.fi-visitor-age').text()).appendTo(row);
                    $('<time>').text($(stage).children('time').text() || config.noTime).appendTo(row);
                });
                if (!list.children().length) {
                    $('<li>').text(scheduleError ? config.error : (scheduleReady ? config.noEntries : config.loading)).appendTo(list);
                }
            });
            syncStars();
        }

        function showInformation() {
            var node = root.querySelector('[data-competition-information]');
            $(node).text(config.loading);
            getInformation().done(function (data) {
                $(node).empty();
                $('<div class="fi-visitor-statistics">')
                    .append($('<div>').append($('<b>').text(data.total)).append($('<span>').text(config.participants)))
                    .append($('<div>').append($('<b>').text(data.schools.length)).append($('<span>').text(config.schools))).appendTo(node);
                var list = $('<div class="fi-visitor-school-list">').appendTo(node);
                data.schools.forEach(function (school) {
                    $('<div>').append($('<span>').text(school.name)).append($('<b>').text(school.total)).appendTo(list);
                });
            }).fail(function () { $(node).text(config.error); });
        }

        $(root).on('click', '[data-favorite-user]', function (event) {
            event.preventDefault();
            event.stopPropagation();
            var id = Number(this.dataset.favoriteUser);
            var index = favorites.indexOf(id);
            if (index === -1) { favorites.push(id); } else { favorites.splice(index, 1); }
            try { localStorage.setItem(storageKey, JSON.stringify(favorites)); } catch (error) {}
            syncStars();
            renderFavorites();
        });
        $(root).on('change', '[data-school-filter], [data-stage-filter]', tools.filterSchedule);
        $(root).on('click', '[data-copy-share]', function () {
            var input = root.querySelector('[data-share-url]');
            if (navigator.clipboard && navigator.clipboard.writeText) {
                navigator.clipboard.writeText(input.value).then(function () {
                    $(root).find('[data-share-status]').text(config.copied);
                }).catch(fallback);
            } else { fallback(); }
            function fallback() {
                input.focus(); input.select();
                $(root).find('[data-share-status]').text(config.copyFallback);
            }
        });
        syncStars();
        getInformation();
        return {decorateSchedule:decorateSchedule,filterSchedule:filterSchedule,
            renderFavorites:renderFavorites,showInformation:showInformation,syncStars:syncStars,url:url,
            scheduleLoading:function () { scheduleReady = false; scheduleError = false; },
            scheduleFailed:function () { scheduleError = true; renderFavorites(); }};
    }
    window.fiVisitorAudience = {create:create};
})(jQuery);