(function() {
    'use strict';

    // Chart.js theme for Pico dark mode
    Chart.defaults.color = '#b0b0b8';
    Chart.defaults.borderColor = '#3a3a4a';

    var attemptsChart = null;
    var hourlyChart = null;

    function getFilterParams() {
        var form = document.getElementById('filter-form');
        if (!form) return '';
        var params = new URLSearchParams();
        var since = form.elements['since'].value;
        var until = form.elements['until'].value;
        if (since) params.set('since', since);
        if (until) params.set('until', until);
        var humanScore = form.elements['human_score'];
        if (humanScore && humanScore.checked) params.set('human_score', '1');
        var sortBy = form.elements['sort'];
        if (sortBy && sortBy.value) params.set('sort', sortBy.value);
        return params.toString();
    }

    function initAttemptsChart() {
        var canvas = document.getElementById('chart-attempts');
        if (!canvas) return;
        var ctx = canvas.getContext('2d');

        var qs = getFilterParams();
        var url = '/api/charts/attempts-over-time' + (qs ? '?' + qs : '');

        fetch(url)
            .then(function(r) { return r.json(); })
            .then(function(data) {
                var labels = data.points.map(function(p) { return p.date; });
                var values = data.points.map(function(p) { return p.count; });

                if (attemptsChart) {
                    attemptsChart.data.labels = labels;
                    attemptsChart.data.datasets[0].data = values;
                    attemptsChart.update();
                    return;
                }

                attemptsChart = new Chart(ctx, {
                    type: 'line',
                    data: {
                        labels: labels,
                        datasets: [{
                            label: 'Attempts',
                            data: values,
                            borderColor: '#6366f1',
                            backgroundColor: 'rgba(99, 102, 241, 0.1)',
                            fill: true,
                            tension: 0.3,
                            pointRadius: 2
                        }]
                    },
                    options: {
                        responsive: true,
                        maintainAspectRatio: true,
                        plugins: { legend: { display: false } },
                        scales: {
                            x: { grid: { display: false } },
                            y: { beginAtZero: true }
                        }
                    }
                });
            });
    }

    function initHourlyChart() {
        var canvas = document.getElementById('chart-hourly');
        if (!canvas) return;
        var ctx = canvas.getContext('2d');

        var qs = getFilterParams();
        var url = '/api/charts/hourly-pattern' + (qs ? '?' + qs : '');

        fetch(url)
            .then(function(r) { return r.json(); })
            .then(function(data) {
                // Fill all 24 hours, defaulting to 0
                var hourMap = {};
                data.hours.forEach(function(h) { hourMap[h.hour] = h.count; });
                var labels = [];
                var values = [];
                for (var i = 0; i < 24; i++) {
                    labels.push(i + ':00');
                    values.push(hourMap[i] || 0);
                }

                if (hourlyChart) {
                    hourlyChart.data.labels = labels;
                    hourlyChart.data.datasets[0].data = values;
                    hourlyChart.update();
                    return;
                }

                hourlyChart = new Chart(ctx, {
                    type: 'bar',
                    data: {
                        labels: labels,
                        datasets: [{
                            label: 'Attempts',
                            data: values,
                            backgroundColor: 'rgba(99, 102, 241, 0.6)',
                            borderColor: '#6366f1',
                            borderWidth: 1
                        }]
                    },
                    options: {
                        responsive: true,
                        maintainAspectRatio: true,
                        plugins: { legend: { display: false } },
                        scales: {
                            x: { grid: { display: false } },
                            y: { beginAtZero: true }
                        }
                    }
                });
            });
    }

    function initWorldMap() {
        var container = document.getElementById('world-map');
        if (!container) return;

        fetch('/static/world.svg')
            .then(function(r) { return r.text(); })
            .then(function(svgText) {
                container.innerHTML = svgText;

                fetch('/api/charts/country-stats')
                    .then(function(r) { return r.json(); })
                    .then(function(data) {
                        colorMap(container, data.countries);
                    });
            });
    }

    function colorMap(container, countries) {
        if (!countries || countries.length === 0) return;

        var maxCount = countries[0].count; // already sorted DESC
        var logMax = Math.log(maxCount + 1);

        // Build lookup
        var lookup = {};
        countries.forEach(function(c) {
            lookup[c.country.toLowerCase()] = c.count;
        });

        // Create tooltip element
        var tooltip = document.createElement('div');
        tooltip.id = 'map-tooltip';
        tooltip.style.cssText = 'position:fixed;display:none;background:#1a1a2e;color:#e0e0e8;padding:4px 8px;border-radius:4px;font-size:13px;pointer-events:none;z-index:1000;border:1px solid #3a3a4a;';
        document.body.appendChild(tooltip);

        var svg = container.querySelector('svg');
        if (!svg) return;

        // Remove SVG title to prevent browser native tooltip
        var svgTitle = svg.querySelector('title');
        if (svgTitle) svgTitle.remove();

        // Select both <path id="xx"> and <g id="xx"> country elements
        var elements = svg.querySelectorAll('path[id], g[id]');
        elements.forEach(function(el) {
            var id = el.id.toLowerCase();
            if (id.charAt(0) === '_') return; // skip non-country paths

            var count = lookup[id];
            if (count) {
                var intensity = Math.log(count + 1) / logMax;
                var r = Math.round(30 + intensity * 69);   // 30 -> 99
                var g = Math.round(30 + intensity * 72);   // 30 -> 102
                var b = Math.round(62 + intensity * 179);  // 62 -> 241
                var color = 'rgb(' + r + ',' + g + ',' + b + ')';
                // For <g> elements, color child paths; for <path>, color directly
                if (el.tagName.toLowerCase() === 'g') {
                    el.querySelectorAll('path').forEach(function(p) {
                        p.style.fill = color;
                    });
                } else {
                    el.style.fill = color;
                }
            }

            el.addEventListener('mouseenter', function(e) {
                var cc = id.toUpperCase();
                var n = lookup[id] || 0;
                tooltip.textContent = cc + ': ' + n.toLocaleString() + ' attempts';
                tooltip.style.display = 'block';
            });

            el.addEventListener('mousemove', function(e) {
                tooltip.style.left = (e.clientX + 12) + 'px';
                tooltip.style.top = (e.clientY - 10) + 'px';
            });

            el.addEventListener('mouseleave', function() {
                tooltip.style.display = 'none';
            });

            el.addEventListener('click', function() {
                var input = document.querySelector('#filter-form input[name="country"]');
                if (input) {
                    input.value = id.toUpperCase();
                    applyFilters();
                }
            });

            el.style.cursor = 'pointer';
        });
    }

    function applyFilters() {
        // Re-fetch charts with filter params
        initAttemptsChart();
        initHourlyChart();

        // Re-fetch dashboard content via htmx
        var form = document.getElementById('filter-form');
        if (!form) return;

        var params = new URLSearchParams();
        ['since', 'until', 'ip', 'country', 'username'].forEach(function(name) {
            var val = form.elements[name].value;
            if (val) params.set(name, val);
        });

        var humanScore = form.elements['human_score'];
        if (humanScore && humanScore.checked) params.set('human_score', '1');
        var sortBy = form.elements['sort'];
        if (sortBy && sortBy.value) params.set('sort', sortBy.value);

        var target = document.getElementById('dashboard-content');
        if (target) {
            var url = '/fragments/dashboard-content?' + params.toString();
            htmx.ajax('GET', url, {target: '#dashboard-content', swap: 'innerHTML'});
        }

        // Server-side filter for recent sessions table
        var sessionsUrl = '/fragments/recent-sessions?' + params.toString();
        htmx.ajax('GET', sessionsUrl, {target: '#recent-sessions-table tbody', swap: 'innerHTML'});
    }

    window.clearFilters = function() {
        var form = document.getElementById('filter-form');
        if (form) {
            form.reset();
            applyFilters();
        }
    };

    window.applyFilters = applyFilters;

    // Initialize on DOM ready
    document.addEventListener('DOMContentLoaded', function() {
        initAttemptsChart();
        initHourlyChart();
        initWorldMap();

        var form = document.getElementById('filter-form');
        if (form) {
            form.addEventListener('submit', function(e) {
                e.preventDefault();
                applyFilters();
            });
        }
    });
})();