{% extends "base.html" %}

{% block head %}
<link rel="stylesheet" href="https://unpkg.com/leaflet@1.9.4/dist/leaflet.css"
    integrity="sha256-p4NxAoJBhIIN+hmNHrzRCf9tD/miZyoHS5obTRR9BMY=" crossorigin="" />
<script src="https://unpkg.com/leaflet@1.9.4/dist/leaflet.js"
    integrity="sha256-20nQCchB9co0qIjJZRGuk2/Z9VM+kNiyxNV1lvTlZBo=" crossorigin=""></script>
<script src="https://cdn.jsdelivr.net/npm/chart.js"></script>
<style>
    /* Scoped styles for activity view */
    .activity-view-header {
        background: white;
        border-bottom: 1px solid #e2e8f0;
        padding: 1rem 0;
        margin-bottom: 2rem;
        position: sticky;
        top: 0;
        z-index: 100;
    }

    .header-content {
        display: flex;
        justify-content: space-between;
        align-items: center;
    }

    .title-section h1 {
        font-size: 1.5rem;
        font-weight: 600;
        color: #1a202c;
        margin: 0;
    }

    .title-section p {
        font-size: 0.875rem;
        color: #718096;
        margin: 0;
    }

    .actions {
        display: flex;
        gap: 0.5rem;
    }

    .layout {
        display: grid;
        grid-template-columns: 1fr 400px;
        gap: 1.5rem;
    }

    .av-card {
        background: white;
        border-radius: 8px;
        box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
        padding: 1.5rem;
        margin-bottom: 1.5rem;
    }

    .av-card-header {
        font-size: 1.125rem;
        font-weight: 600;
        margin-bottom: 1rem;
        color: #1a202c;
        display: flex;
        justify-content: space-between;
        align-items: center;
    }

    .map-container {
        height: 400px;
        border-radius: 6px;
        overflow: hidden;
        border: 1px solid #e2e8f0;
    }

    #map {
        height: 100%;
        width: 100%;
    }

    .stats-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 1rem;
        margin-bottom: 1.5rem;
    }

    .stat-card {
        background: #f7fafc;
        padding: 1rem;
        border-radius: 6px;
        border: 1px solid #e2e8f0;
        text-align: center;
    }

    .stat-label {
        font-size: 0.75rem;
        color: #718096;
        text-transform: uppercase;
        letter-spacing: 0.5px;
        margin-bottom: 0.25rem;
    }

    .stat-value {
        font-size: 1.5rem;
        font-weight: 700;
        color: #1a202c;
    }

    .stat-unit {
        font-size: 0.875rem;
        color: #4a5568;
        font-weight: 400;
    }

    .metrics-section {
        display: grid;
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .metric-group {
        background: #f7fafc;
        padding: 1rem;
        border-radius: 6px;
        border: 1px solid #e2e8f0;
    }

    .metric-group h4 {
        font-size: 0.875rem;
        color: #4a5568;
        margin-bottom: 0.75rem;
        font-weight: 600;
        border-bottom: 1px solid #e2e8f0;
        padding-bottom: 0.5rem;
    }

    .metric-row {
        display: flex;
        justify-content: space-between;
        padding: 0.25rem 0;
    }

    .metric-label {
        color: #718096;
        font-size: 0.875rem;
    }

    .metric-value {
        font-weight: 600;
        color: #1a202c;
        font-size: 0.875rem;
    }

    .segment-item {
        padding: 0.75rem;
        background: #f7fafc;
        border-radius: 6px;
        margin-bottom: 0.5rem;
        border: 1px solid #e2e8f0;
    }

    .segment-name {
        font-weight: 600;
        font-size: 0.875rem;
    }

    .segment-time {
        color: #4a5568;
        font-size: 0.875rem;
    }

    .chart-container-large {
        height: 500px;
        position: relative;
    }

    @media (max-width: 1024px) {
        .layout {
            grid-template-columns: 1fr;
        }

        .metrics-section {
            grid-template-columns: 1fr 1fr;
        }
    }

    @media (max-width: 640px) {
        .metrics-section {
            grid-template-columns: 1fr;
        }
    }
</style>
{% endblock %}

{% block content %}
<!-- Header -->
<div class="activity-view-header">
    <div class="header-content">
        <div class="title-section">
            <h1 id="act-name">Loading Activity...</h1>
            <p>
                <span id="act-time"></span> |
                <span id="act-type"></span> |
                ID: <span id="act-id"></span>
            </p>
        </div>
        <div class="actions">
            <!-- Navigation -->
            <div class="btn-group me-2">
                <a href="#" class="btn btn-outline-secondary disabled" id="nav-prev-type"
                    title="Previous of same type"><i class="bi bi-chevron-double-left"></i></a>
                <a href="#" class="btn btn-outline-secondary disabled" id="nav-prev" title="Previous"><i
                        class="bi bi-chevron-left"></i></a>
                <a href="#" class="btn btn-outline-secondary disabled" id="nav-next" title="Next"><i
                        class="bi bi-chevron-right"></i></a>
                <a href="#" class="btn btn-outline-secondary disabled" id="nav-next-type" title="Next of same type"><i
                        class="bi bi-chevron-double-right"></i></a>
            </div>

            <button class="btn btn-outline-secondary" onclick="window.close()">Close</button>
            <button class="btn btn-outline-primary" id="download-btn">Download</button>
            <button class="btn btn-outline-warning" id="refresh-btn" onclick="refreshActivity()">Refresh &
                Match</button>
            <button class="btn btn-warning" id="estimate-power-btn" onclick="estimatePower()">Est. Power</button>
            <a href="/discovery?activity_id={{ activity_id }}" class="btn btn-outline-info">My Segments</a>
        </div>
    </div>
</div>

<div class="layout">
    <!-- Left Column: Map, Segments, Streams -->
    <div class="left-column">
        <!-- Map -->
        <div class="av-card">
            <div class="av-card-header">
                Route Map
                <button class="btn btn-sm btn-link" onclick="toggleSegmentMode()">+ Create Segment</button>
            </div>
            <div class="map-container">
                <div id="map"></div>
                <div id="no-map-msg" class="text-center p-5 text-muted" style="display:none;">
                    <i class="bi bi-geo-alt-fill" style="font-size: 2rem;"></i>
                    <p class="mt-2">No GPS data available.</p>
                </div>
            </div>
        </div>

        <!-- Segments -->
        <div class="av-card">
            <div class="av-card-header">Matched Segments</div>
            <div id="segments-list" class="segment-list">
                <div class="text-center text-muted p-2">Loading segments...</div>
            </div>
        </div>

        <!-- Charts -->
        <div class="av-card">
            <div class="av-card-header">
                Activity Streams
                <div>
                    <div class="form-check form-switch d-inline-block me-2">
                        <input class="form-check-input" type="checkbox" id="smooth-toggle" onchange="toggleSmoothing()">
                        <label class="form-check-label" for="smooth-toggle">Smooth</label>
                    </div>
                    <button class="btn btn-sm btn-outline-secondary" onclick="openChartModal()">Full Screen</button>
                </div>
            </div>

            <!-- Toggles -->
            <div class="d-flex flex-wrap gap-2 mb-3" id="chart-toggles"></div>

            <div class="chart-container-large">
                <canvas id="streams-chart"></canvas>
            </div>
        </div>
    </div>

    <!-- Right Column: Stats & Metrics -->
    <div class="right-column">
        <!-- Overview -->
        <div class="av-card">
            <div class="av-card-header">Overview</div>
            <div class="stats-grid">
                <div class="stat-card">
                    <div class="stat-label">Distance</div>
                    <div class="stat-value" id="metric-dist">-</div>
                </div>
                <div class="stat-card">
                    <div class="stat-label">Duration</div>
                    <div class="stat-value" id="metric-dur">-</div>
                </div>
                <div class="stat-card">
                    <div class="stat-label">Avg HR</div>
                    <div class="stat-value" id="metric-hr">-</div>
                </div>
            </div>
        </div>

        <!-- Detailed Metrics -->
        <div class="av-card">
            <div class="av-card-header">Performance Metrics</div>
            <div class="metrics-section">
                <!-- Heart Rate -->
                <div class="metric-group">
                    <h4>Heart Rate</h4>
                    <div class="metric-row"><span class="metric-label">Average</span><span class="metric-value"><span
                                id="m-avg-hr">-</span> bpm</span></div>
                    <div class="metric-row"><span class="metric-label">Max</span><span class="metric-value"><span
                                id="m-max-hr">-</span> bpm</span></div>
                </div>

                <!-- Speed -->
                <div class="metric-group">
                    <h4>Speed</h4>
                    <div class="metric-row"><span class="metric-label">Average</span><span class="metric-value"><span
                                id="m-avg-spd">-</span> km/h</span></div>
                    <div class="metric-row"><span class="metric-label">Max</span><span class="metric-value"><span
                                id="m-max-spd">-</span> km/h</span></div>
                </div>

                <!-- Power -->
                <div class="metric-group">
                    <h4>Power</h4>
                    <div class="metric-row"><span class="metric-label">Average</span><span class="metric-value"><span
                                id="m-avg-pwr">-</span> W</span></div>
                    <div class="metric-row"><span class="metric-label">Max</span><span class="metric-value"><span
                                id="m-max-pwr">-</span> W</span></div>
                    <div class="metric-row"><span class="metric-label">Normalized</span><span class="metric-value"><span
                                id="m-norm-pwr">-</span> W</span></div>
                    <div class="metric-row"><span class="metric-label">VO2 Max</span><span class="metric-value"><span
                                id="m-vo2">-</span></span></div>
                </div>

                <!-- Elevation -->
                <div class="metric-group">
                    <h4>Elevation</h4>
                    <div class="metric-row"><span class="metric-label">Gain</span><span class="metric-value"><span
                                id="m-ele-gain">-</span> m</span></div>
                    <div class="metric-row"><span class="metric-label">Loss</span><span class="metric-value"><span
                                id="m-ele-loss">-</span> m</span></div>
                </div>

                <!-- Training Effect -->
                <div class="metric-group">
                    <h4>Training Effect</h4>
                    <div class="metric-row"><span class="metric-label">Aerobic</span><span class="metric-value"
                            id="m-aerobic">-</span></div>
                    <div class="metric-row"><span class="metric-label">Anaerobic</span><span class="metric-value"
                            id="m-anaerobic">-</span></div>
                    <div class="metric-row"><span class="metric-label">TSS</span><span class="metric-value"
                            id="m-tss">-</span></div>
                </div>

                <!-- Cadence -->
                <div class="metric-group">
                    <h4>Cadence</h4>
                    <div class="metric-row"><span class="metric-label">Average</span><span class="metric-value"><span
                                id="m-avg-cad">-</span> rpm</span></div>
                    <div class="metric-row"><span class="metric-label">Max</span><span class="metric-value"><span
                                id="m-max-cad">-</span> rpm</span></div>
                </div>

                <!-- Respiration -->
                <div class="metric-group">
                    <h4>Respiration</h4>
                    <div class="metric-row"><span class="metric-label">Average</span><span class="metric-value"><span
                                id="m-avg-resp">-</span> br/min</span></div>
                    <div class="metric-row"><span class="metric-label">Max</span><span class="metric-value"><span
                                id="m-max-resp">-</span> br/min</span></div>
                </div>

                <!-- Bike Setup -->
                <div class="metric-group">
                    <div class="d-flex justify-content-between align-items-center mb-2">
                        <h4 class="mb-0" style="border:none">Bike Setup</h4>
                        <button class="btn btn-sm btn-link p-0" onclick="editBikeSetup()">Edit</button>
                    </div>
                    <div id="m-bike-info" class="small text-muted">No Setup</div>
                </div>
            </div>
        </div>
    </div>
</div>

<!-- Full Screen Modal -->
<div class="modal fade" id="chartModal" tabindex="-1">
    <div class="modal-dialog modal-fullscreen">
        <div class="modal-content">
            <div class="modal-header">
                <h5 class="modal-title">Activity Streams</h5>
                <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
            </div>
            <div class="modal-body">
                <div style="height: 100%; width: 100%;">
                    <canvas id="modal-chart"></canvas>
                </div>
            </div>
        </div>
    </div>
</div>

{% endblock %}

{% block scripts %}
<script>
    const activityId = "{{ activity_id }}";
    let map = null;
    let chartInstance = null;
    let modalChartInstance = null;
    let streamData = null;
    let isSmoothingEnabled = false;

    // Visibility state
    let metricVisibility = {
        heart_rate: true,
        speed: true,
        power: true,
        altitude: false,
        cadence: false,
        respiration_rate: false
    };

    const metricConfig = {
        heart_rate: { label: 'Heart Rate', icon: '❤️', color: '#ef4444' },
        speed: { label: 'Speed', icon: '🚴', color: '#3b82f6' },
        power: { label: 'Power', icon: '⚡', color: '#f97316' },
        altitude: { label: 'Elevation', icon: '⛰️', color: '#16a34a' },
        cadence: { label: 'Cadence', icon: '🔄', color: '#a855f7' },
        respiration_rate: { label: 'Resp', icon: '🫁', color: '#0dcaf0' }
    };

    document.addEventListener('DOMContentLoaded', async () => {
        // Init Map
        map = L.map('map').setView([0, 0], 2);
        L.tileLayer('https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png', {
            attribution: '&copy; OpenStreetMap contributors'
        }).addTo(map);

        await loadDetails();
        await loadMapData();
        loadNavigation();
        loadCharts();

        document.getElementById('download-btn').onclick = () => {
            window.location.href = `/api/activities/download/${activityId}`;
        };
    });

    async function loadNavigation() {
        try {
            const res = await fetch(`/api/activities/${activityId}/navigation`);
            if (res.ok) {
                const nav = await res.json();
                function setBtn(id, targetId) {
                    const el = document.getElementById(id);
                    if (targetId) {
                        el.href = `/activity/${targetId}`;
                        el.classList.remove('disabled');
                    }
                }
                setBtn('nav-prev', nav.prev_id);
                setBtn('nav-next', nav.next_id);
                setBtn('nav-prev-type', nav.prev_type_id);
                setBtn('nav-next-type', nav.next_type_id);
            }
        } catch (e) { console.error("Nav load failed", e); }
    }

    async function loadDetails() {
        try {
            const res = await fetch(`/api/activities/${activityId}/details`);
            if (!res.ok) throw new Error("Failed to load details");
            const data = await res.json();
            window.currentDbId = data.id;
            window.currentActivityType = data.activity_type;

            // Header
            document.getElementById('act-name').textContent = data.activity_name || 'Untitled Activity';
            document.getElementById('act-time').textContent = new Date(data.start_time).toLocaleString();
            document.getElementById('act-type').textContent = data.activity_type;
            document.getElementById('act-id').textContent = data.garmin_activity_id;

            // Overview
            document.getElementById('metric-dist').textContent = data.distance ? (data.distance / 1000).toFixed(2) + ' km' : '-';
            document.getElementById('metric-dur').textContent = formatDuration(data.duration);
            document.getElementById('metric-hr').textContent = data.avg_hr ? data.avg_hr + ' bpm' : '-';

            // Details
            document.getElementById('m-avg-hr').textContent = data.avg_hr || '-';
            document.getElementById('m-max-hr').textContent = data.max_hr || '-';

            document.getElementById('m-avg-spd').textContent = data.avg_speed ? (data.avg_speed * 3.6).toFixed(1) : '-';
            document.getElementById('m-max-spd').textContent = data.max_speed ? (data.max_speed * 3.6).toFixed(1) : '-';

            document.getElementById('m-avg-pwr').textContent = data.avg_power || '-';
            document.getElementById('m-max-pwr').textContent = data.max_power || '-';
            document.getElementById('m-norm-pwr').textContent = data.norm_power || '-';
            document.getElementById('m-vo2').textContent = data.vo2_max || '-';

            document.getElementById('m-ele-gain').textContent = data.elevation_gain || '-';
            document.getElementById('m-ele-loss').textContent = data.elevation_loss || '-';

            document.getElementById('m-aerobic').textContent = data.aerobic_te || '-';
            document.getElementById('m-anaerobic').textContent = data.anaerobic_te || '-';
            document.getElementById('m-tss').textContent = data.tss || '-';

            document.getElementById('m-avg-cad').textContent = data.avg_cadence || '-';
            document.getElementById('m-max-cad').textContent = data.max_cadence || '-';

            document.getElementById('m-avg-resp').textContent = data.avg_respiration_rate ? data.avg_respiration_rate.toFixed(1) : '-';
            document.getElementById('m-max-resp').textContent = data.max_respiration_rate ? data.max_respiration_rate.toFixed(1) : '-';

            // Bike Setup
            if (data.bike_setup) {
                const b = data.bike_setup;
                const txt = b.name ? `<strong>${b.name}</strong><br>${b.frame} ${b.chainring}/${b.rear_cog}` : `${b.frame} ${b.chainring}/${b.rear_cog}`;
                document.getElementById('m-bike-info').innerHTML = txt;
            }

            // Segments
            if (window.currentDbId) {
                loadSegmentsEfforts(window.currentDbId);
            }
        } catch (e) {
            console.error(e);
        }
    }

    async function loadMapData() {
        try {
            const res = await fetch(`/api/activities/${activityId}/geojson`);
            if (res.ok) {
                const geojson = await res.json();
                if (geojson.features && geojson.features.length > 0) {
                    const layer = L.geoJSON(geojson, {
                        style: { color: 'red', weight: 4, opacity: 0.7 }
                    }).addTo(map);
                    map.fitBounds(layer.getBounds());
                } else {
                    document.getElementById('map').style.display = 'none';
                    document.getElementById('no-map-msg').style.display = 'block';
                }
            }
        } catch (e) { }
    }

    // Load Segments (Efforts)
    async function loadSegmentsEfforts(dbId) {
        const container = document.getElementById('segments-list');
        try {
            const res = await fetch(`/api/segments/efforts/${dbId}`);
            if (!res.ok) throw new Error('Failed to load efforts');
            const data = await res.json();

            if (!data || data.length === 0) {
                container.innerHTML = '<div class="text-center text-muted p-2">No matched segments.</div>';
                return;
            }

            let html = '';
            data.forEach(eff => {
                html += `
                 <div class="segment-item">
                    <div class="d-flex justify-content-between">
                        <span class="segment-name">${eff.segment_name}</span>
                        <span class="badge bg-secondary">${eff.rank_text || ''}</span>
                    </div>
                    <div class="segment-time">Time: ${formatDuration(eff.elapsed_time)}</div>
                 </div>`;
            });
            container.innerHTML = html;
        } catch (e) {
            container.innerHTML = '<div class="text-danger small p-2">Error loading segments</div>';
        }
    }

    async function loadCharts() {
        try {
            const res = await fetch(`/api/activities/${activityId}/streams`);
            if (!res.ok) return;
            const data = await res.json();
            if (!data.time || data.time.length === 0) return;
            streamData = data;
            renderChart('streams-chart', data);
            renderToggles();
        } catch (e) { console.error(e); }
    }

    function renderToggles() {
        const container = document.getElementById('chart-toggles');
        let html = '';
        Object.keys(metricConfig).forEach(key => {
            if (streamData && streamData[key] && streamData[key].some(x => x)) {
                const cfg = metricConfig[key];
                const active = metricVisibility[key];
                const bg = active ? cfg.color : '#e5e7eb';
                const fg = active ? 'white' : '#4b5563';
                html += `<button onclick="toggleMetric('${key}')" style="background:${bg};color:${fg};border:none;border-radius:20px;padding:5px 12px;font-size:12px;">${cfg.icon} ${cfg.label}</button>`;
            }
        });
        container.innerHTML = html;
    }

    function toggleMetric(key) {
        metricVisibility[key] = !metricVisibility[key];
        renderToggles();
        if (chartInstance) updateChartVisibility(chartInstance);
        if (modalChartInstance) updateChartVisibility(modalChartInstance);
    }

    function updateChartVisibility(chart) {
        chart.data.datasets.forEach(ds => {
            ds.hidden = !metricVisibility[ds.rawKey];
        });
        chart.update();
    }

    function toggleSmoothing() {
        isSmoothingEnabled = document.getElementById('smooth-toggle').checked;
        if (streamData) {
            renderChart('streams-chart', streamData);
            if (modalChartInstance) renderChart('modal-chart', streamData);
        }
    }

    function movingAverage(data, windowSize) {
        if (!data || data.length === 0) return [];
        const result = [];
        for (let i = 0; i < data.length; i++) {
            let sum = 0;
            let count = 0;
            const offset = Math.floor(windowSize / 2);
            for (let j = i - offset; j < i - offset + windowSize; j++) {
                if (j >= 0 && j < data.length && data[j] !== null) {
                    sum += data[j];
                    count++;
                }
            }
            result.push(count > 0 ? sum / count : null);
        }
        return result;
    }

    function renderChart(canvasId, rawData) {
        const ctx = document.getElementById(canvasId).getContext('2d');
        if (canvasId === 'streams-chart' && chartInstance) { chartInstance.destroy(); }
        if (canvasId === 'modal-chart' && modalChartInstance) { modalChartInstance.destroy(); }

        const data = { ...rawData };
        if (isSmoothingEnabled) {
            const window = 10;
            Object.keys(metricConfig).forEach(k => {
                if (data[k]) data[k] = movingAverage(data[k], window);
            });
        }

        const datasets = [];
        const common = { pointRadius: 0, borderWidth: 2, tension: 0.4 };

        // Helper to add dataset
        const addDs = (key, label, color, yAxis, factor = 1) => {
            if (data[key] && data[key].some(x => x)) {
                datasets.push({
                    ...common,
                    label: label,
                    rawKey: key,
                    data: factor === 1 ? data[key] : data[key].map(v => v ? v * factor : null),
                    borderColor: color,
                    backgroundColor: color,
                    yAxisID: yAxis,
                    hidden: !metricVisibility[key]
                });
            }
        };

        addDs('heart_rate', 'Heart Rate', metricConfig.heart_rate.color, 'left');
        addDs('speed', 'Speed', metricConfig.speed.color, 'right', 3.6);
        addDs('power', 'Power', metricConfig.power.color, 'right');
        addDs('altitude', 'Elevation', metricConfig.altitude.color, 'right');
        addDs('cadence', 'Cadence', metricConfig.cadence.color, 'left');
        addDs('respiration_rate', 'Respiration', metricConfig.respiration_rate.color, 'left');

        const labels = data.time.map(t => {
            const h = Math.floor(t / 3600);
            const m = Math.floor((t % 3600) / 60);
            return h > 0 ? `${h}h${m}m` : `${m}m`;
        });

        const newChart = new Chart(ctx, {
            type: 'line',
            data: { labels, datasets },
            options: {
                responsive: true,
                maintainAspectRatio: false,
                interaction: { mode: 'index', intersect: false },
                plugins: { legend: { display: false } },
                scales: {
                    x: { ticks: { maxTicksLimit: 12 }, grid: { display: false } },
                    left: { type: 'linear', position: 'left', grid: { display: true, borderDash: [3, 3] } },
                    right: { type: 'linear', position: 'right', grid: { display: false } }
                }
            }
        });

        if (canvasId === 'streams-chart') chartInstance = newChart;
        if (canvasId === 'modal-chart') modalChartInstance = newChart;
    }

    function openChartModal() {
        const modal = new bootstrap.Modal(document.getElementById('chartModal'));
        modal.show();
        document.getElementById('chartModal').addEventListener('shown.bs.modal', () => {
            if (streamData) renderChart('modal-chart', streamData);
        }, { once: true });
    }

    function formatDuration(seconds) {
        if (!seconds) return "-";
        const h = Math.floor(seconds / 3600);
        const m = Math.floor((seconds % 3600) / 60);
        const s = Math.floor(seconds % 60);
        return h > 0 ? `${h}h ${m}m ${s}s` : `${m}m ${s}s`;
    }

    // Stub functions for buttons
    function refreshActivity() {
        if (confirm("Refresh activity data from Garmin?")) {
            fetch(`/api/activities/${activityId}/refresh`, { method: 'POST' })
                .then(r => r.json())
                .then(d => { alert(d.message); window.location.reload(); })
                .catch(e => alert("Error refreshing"));
        }
    }

    function estimatePower() {
        fetch(`/api/activities/${activityId}/estimate_power`, { method: 'POST' })
            .then(r => r.json())
            .then(d => { alert("Power estimation queued"); })
            .catch(e => alert("Error"));
    }

    function toggleSegmentMode() {
        alert("Segment creation mode (stub)");
    }

    function editBikeSetup() {
        alert("Edit bike setup (stub)");
    }
</script>
{% endblock %}