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<!DOCTYPE html>
<html lang="ru">
<head>
<meta charset="UTF-8">
<title>Mouse Humanize Visualizer</title>
<style>
    * { box-sizing: border-box; margin: 0; padding: 0; }
    :root {
        --bg: #0f111a;
        --panel: rgba(22, 27, 34, 0.92);
        --border: #30363d;
        --text: #e6edf3;
        --muted: #8b949e;
        --blue: #58a6ff;
        --red: #f85149;
        --green: #3fb950;
        --yellow: #d29922;
    }
    body {
        background: var(--bg);
        color: var(--text);
        font-family: 'SFMono-Regular', Consolas, monospace;
        overflow: hidden;
        width: 100vw;
        height: 100vh;
        position: relative;
        font-size: 13px;
    }
    #canvas {
        position: absolute;
        top: 0;
        left: 0;
        z-index: 1;
        pointer-events: none;
    }
    .panel {
        position: absolute;
        background: var(--panel);
        border: 1px solid var(--border);
        border-radius: 6px;
        padding: 10px 12px;
        z-index: 10;
        backdrop-filter: blur(2px);
    }
    .panel h3 {
        font-size: 11px;
        text-transform: uppercase;
        letter-spacing: 0.04em;
        color: var(--muted);
        margin-bottom: 6px;
        font-weight: normal;
    }
    /* ---- stats (top-left) ---- */
    #stats {
        top: 14px;
        left: 14px;
        width: 260px;
        line-height: 1.55;
    }
    .panel .row { display: flex; justify-content: space-between; gap: 8px; }
    .panel .row span:last-child { color: var(--blue); font-weight: bold; }
    .panel .sep { border-top: 1px solid var(--border); margin: 6px 0; }

    /* ---- keyboard humanize panel (top-center) ---- */
    #keyboard-panel {
        top: 14px;
        left: 50%;
        transform: translateX(-50%);
        width: 380px;
    }
    #keyboard-panel .row { margin-bottom: 2px; }
    #keyboard-panel .typing-row { display: flex; gap: 6px; margin-bottom: 8px; }
    #typing-input {
        flex: 1;
        background: #0d1117;
        border: 1px solid var(--border);
        border-radius: 4px;
        color: var(--text);
        padding: 6px 8px;
        font-family: inherit;
        font-size: 13px;
    }
    #typing-input:focus { outline: 1px solid var(--blue); }
    #btn-kb-clear {
        background: #21262d;
        border: 1px solid var(--border);
        color: var(--muted);
        border-radius: 4px;
        cursor: pointer;
        padding: 0 12px;
        font-family: inherit;
    }
    #btn-kb-clear:hover { background: #30363d; }

    /* ---- controls (top-right) ---- */
    #controls {
        top: 14px;
        right: 14px;
        width: 210px;
    }
    #controls button {
        width: 100%;
        margin-bottom: 6px;
        padding: 6px 8px;
        background: #21262d;
        color: var(--text);
        border: 1px solid var(--border);
        border-radius: 4px;
        cursor: pointer;
        font-family: inherit;
        font-size: 12px;
    }
    #controls button:hover { background: #30363d; }
    #controls label {
        display: flex;
        align-items: center;
        gap: 6px;
        margin-bottom: 4px;
        color: var(--muted);
        font-size: 12px;
        cursor: pointer;
    }

    /* ---- graphs (bottom-left) ---- */
    #graph-container {
        bottom: 14px;
        left: 14px;
        width: 480px;
    }
    .graph-label {
        font-size: 11px;
        color: var(--muted);
        margin: 6px 0 3px;
        display: flex;
        justify-content: space-between;
    }
    canvas.graph { display: block; width: 100%; border-bottom: 1px solid #21262d; }

    /* ---- history (bottom-right) ---- */
    #history-panel {
        bottom: 14px;
        right: 14px;
        width: 320px;
        max-height: 300px;
        display: flex;
        flex-direction: column;
    }
    #history-list {
        overflow-y: auto;
        flex: 1;
        margin-top: 4px;
    }
    .run-entry {
        padding: 5px 6px;
        border-radius: 4px;
        border: 1px solid transparent;
        cursor: pointer;
        font-size: 11px;
        color: var(--muted);
        line-height: 1.4;
    }
    .run-entry:hover { background: #1c2128; }
    .run-entry.selected { border-color: var(--blue); background: #17253a; color: var(--text); }
    .run-entry b { color: var(--text); }

    /* ---- targets ---- */
    .targets-container {
        position: absolute;
        width: 100%;
        height: 100%;
        z-index: 2;
    }
    .target-btn {
        position: absolute;
        padding: 22px 32px;
        background: #1f242c;
        border: 2px dashed var(--blue);
        border-radius: 8px;
        color: var(--blue);
        font-weight: bold;
        font-family: inherit;
        cursor: pointer;
        user-select: none;
    }
    .target-btn::after {
        content: '';
        position: absolute;
        top: 50%;
        left: 50%;
        width: 6px;
        height: 6px;
        background: var(--red);
        border-radius: 50%;
        transform: translate(-50%, -50%);
    }
    .heatmap {
        position: absolute;
        top: -46px;
        left: 50%;
        transform: translateX(-50%);
        width: 44px;
        height: 44px;
        background: rgba(13, 17, 23, 0.9);
        border: 1px solid var(--border);
        border-radius: 4px;
        pointer-events: none;
    }
</style>
</head>
<body>

<canvas id="canvas"></canvas>

<div class="panel" id="stats">
    <h3>Текущий run</h3>
    <div class="row"><span>Точек</span><span id="s-pts">0</span></div>
    <div class="row"><span>Длительность</span><span id="s-dur">0 ms</span></div>
    <div class="row"><span>Путь / прямая</span><span id="s-path">0 / 0 px</span></div>
    <div class="row"><span>Линейность</span><span id="s-eff">—</span></div>
    <div class="row"><span>Avg / Max V</span><span id="s-v">0 / 0 px/ms</span></div>
    <div class="row"><span>Джиттер dt (σ)</span><span id="s-jitter">—</span></div>
    <div class="sep"></div>
    <div class="row"><span>Max V (всего)</span><span id="s-maxv-all">0</span></div>
    <div class="row"><span>Клик Δ</span><span id="s-click">—</span></div>
</div>

<div class="panel" id="controls">
    <h3>Управление</h3>
    <button id="btn-clear">Очистить всё</button>
    <button id="btn-fade-toggle">Затухание следа: выкл</button>
    <button id="btn-shuffle">Перемешать мишени</button>
    <button id="btn-export">Экспорт JSON</button>
    <label><input type="checkbox" id="chk-markers" checked> Точки дискретизации</label>
    <label><input type="checkbox" id="chk-ref" checked> Опорная прямая (start→end)</label>
</div>

<div class="panel" id="keyboard-panel">
    <h3>Клавиатура (humanize)</h3>
    <div class="typing-row">
        <input type="text" id="typing-input" placeholder="Печатайте здесь / фокус для инъекции...">
        <button id="btn-kb-clear" title="Очистить">✕</button>
    </div>
    <div class="row"><span>Символов</span><span id="kb-count">0</span></div>
    <div class="row"><span>Длительность</span><span id="kb-dur">0 ms</span></div>
    <div class="row"><span>Скорость</span><span id="kb-speed">0 CPM</span></div>
    <div class="row"><span>Flight avg / σ</span><span id="kb-flight">— / —</span></div>
    <div class="row"><span>Dwell avg / σ</span><span id="kb-dwell">— / —</span></div>
    <div class="graph-label"><span>Flight time (пауза перед клавишей), мс</span></div>
    <canvas class="graph" id="flightGraph" width="360" height="55"></canvas>
    <div class="graph-label"><span>Dwell time (удержание клавиши), мс</span></div>
    <canvas class="graph" id="dwellGraph" width="360" height="55"></canvas>
</div>

<div class="targets-container" id="targets"></div>

<div class="panel" id="graph-container">
    <h3>Кинематика движения V(t)</h3>
    <div class="graph-label">
        <span>Скорость, px/ms</span>
        <span><span style="color:var(--blue)">■</span> speed &nbsp; <span style="color:var(--red)">┊</span> клик</span>
    </div>
    <canvas class="graph" id="vGraph" width="460" height="90"></canvas>
    <div class="graph-label">
        <span>Изменение направления, °</span>
        <span>0° = прямая, 180° = разворот</span>
    </div>
    <canvas class="graph" id="turnGraph" width="460" height="60"></canvas>
</div>

<div class="panel" id="history-panel">
    <h3>История runs (клик — подсветить)</h3>
    <div id="history-list"></div>
</div>

<script>
(function () {
    const canvas = document.getElementById('canvas');
    const ctx = canvas.getContext('2d');
    const vCanvas = document.getElementById('vGraph');
    const vCtx = vCanvas.getContext('2d');
    const tCanvas = document.getElementById('turnGraph');
    const tCtx = tCanvas.getContext('2d');

    function resize() {
        canvas.width = window.innerWidth;
        canvas.height = window.innerHeight;
    }
    window.addEventListener('resize', resize);
    resize();

    // ---------------------------------------------------------------
    // State
    // ---------------------------------------------------------------
    const IDLE_GAP_MS = 300;   // gap that separates two distinct "runs"
    const MAX_RUNS_KEPT = 30;
    const FADE_MS = 25000;      // slow fade so a screenshot has time to catch the full trail

    let runs = [];
    let currentRun = null;
    let lastPoint = null;
    let runIdCounter = 1;
    let globalMaxSpeed = 0;
    let selectedRun = null;      // run picked from history to inspect
    let fadeEnabled = false;     // off by default: trails stay on screen until cleared
    let markersEnabled = true;
    let refLineEnabled = true;

    const targetClicks = {}; // id -> [{dx,dy,halfW,halfH}]

    document.getElementById('btn-fade-toggle').addEventListener('click', (e) => {
        fadeEnabled = !fadeEnabled;
        e.target.textContent = 'Затухание следа: ' + (fadeEnabled ? 'вкл' : 'выкл');
    });
    document.getElementById('chk-markers').addEventListener('change', e => markersEnabled = e.target.checked);
    document.getElementById('chk-ref').addEventListener('change', e => refLineEnabled = e.target.checked);

    // ---------------------------------------------------------------
    // Targets
    // ---------------------------------------------------------------
    const DEFAULT_TARGETS = [
        { id: 'btn-start',  label: 'Start Point' },
        { id: 'btn-target', label: 'Target Button A' },
        { id: 'btn-submit', label: 'Submit Form B' },
    ];

    const targetsContainer = document.getElementById('targets');

    function buildTargets() {
        targetsContainer.innerHTML = '';
        DEFAULT_TARGETS.forEach((t, i) => {
            const btn = document.createElement('button');
            btn.className = 'target-btn';
            btn.id = t.id;
            btn.textContent = t.label;
            const heat = document.createElement('canvas');
            heat.className = 'heatmap';
            heat.width = 44; heat.height = 44;
            btn.appendChild(heat);
            targetsContainer.appendChild(btn);
            if (!targetClicks[t.id]) targetClicks[t.id] = [];
        });
        layoutTargetsDefault();
    }

    function layoutTargetsDefault() {
        const btns = [...targetsContainer.querySelectorAll('.target-btn')];
        const n = btns.length;
        btns.forEach((b, i) => {
            b.style.left = (window.innerWidth * (i + 1) / (n + 1) - 70) + 'px';
            b.style.top = (window.innerHeight / 2 - 30) + 'px';
            b.style.padding = '22px 32px';
        });
    }

    function shuffleTargets() {
        const btns = [...targetsContainer.querySelectorAll('.target-btn')];
        const margin = 120;
        btns.forEach(b => {
            const padV = 14 + Math.random() * 26;
            const padH = 18 + Math.random() * 40;
            b.style.padding = padV.toFixed(0) + 'px ' + padH.toFixed(0) + 'px';
            const w = 90 + padH * 2, h = 40 + padV * 2;
            const x = margin + Math.random() * (window.innerWidth - margin * 2 - w);
            const y = margin + Math.random() * (window.innerHeight - margin * 2 - h);
            b.style.left = x + 'px';
            b.style.top = y + 'px';
        });
    }

    document.getElementById('btn-shuffle').addEventListener('click', shuffleTargets);
    buildTargets();

    // ---------------------------------------------------------------
    // Speed -> color
    // ---------------------------------------------------------------
    function getSpeedColor(speed, max, alpha) {
        const normalized = Math.min(speed / (max || 2.5), 1);
        const hue = (1 - normalized) * 240; // blue (slow) -> red (fast)
        return `hsla(${hue}, 100%, 50%, ${alpha})`;
    }

    // ---------------------------------------------------------------
    // Run management
    // ---------------------------------------------------------------
    function startNewRun(firstPoint) {
        currentRun = {
            id: runIdCounter++,
            points: [firstPoint],
            startTime: firstPoint.t,
            endTime: firstPoint.t,
            maxSpeed: 0,
            click: null,
        };
        runs.push(currentRun);
        if (runs.length > MAX_RUNS_KEPT) runs.shift();
    }

    function addPoint(run, p) {
        const prev = run.points[run.points.length - 1];
        const dt = p.t - prev.t;
        const dist = Math.hypot(p.x - prev.x, p.y - prev.y);
        p.speed = dt > 0 ? dist / dt : 0;
        p.dt = dt;

        // angular change relative to the previous segment (0 = straight line)
        if (run.points.length >= 2) {
            const prev2 = run.points[run.points.length - 2];
            const prevAngle = Math.atan2(prev.y - prev2.y, prev.x - prev2.x);
            const curAngle = Math.atan2(p.y - prev.y, p.x - prev.x);
            let diff = curAngle - prevAngle;
            while (diff > Math.PI) diff -= 2 * Math.PI;
            while (diff < -Math.PI) diff += 2 * Math.PI;
            p.turn = Math.abs(diff) * 180 / Math.PI;
        } else {
            p.turn = 0;
        }

        run.points.push(p);
        run.endTime = p.t;
        if (p.speed > run.maxSpeed) run.maxSpeed = p.speed;
        if (p.speed > globalMaxSpeed) globalMaxSpeed = p.speed;
    }

    function runMetrics(run) {
        const pts = run.points;
        let pathLen = 0;
        const dts = [];
        for (let i = 1; i < pts.length; i++) {
            pathLen += Math.hypot(pts[i].x - pts[i - 1].x, pts[i].y - pts[i - 1].y);
            dts.push(pts[i].dt);
        }
        const straight = Math.hypot(pts[pts.length - 1].x - pts[0].x, pts[pts.length - 1].y - pts[0].y);
        const duration = run.endTime - run.startTime;
        const efficiency = pathLen > 0 ? (straight / pathLen) : 1;
        const avgSpeed = pathLen > 0 && duration > 0 ? pathLen / duration : 0;
        const meanDt = dts.length ? dts.reduce((a, b) => a + b, 0) / dts.length : 0;
        const variance = dts.length ? dts.reduce((a, b) => a + (b - meanDt) ** 2, 0) / dts.length : 0;
        const jitter = Math.sqrt(variance);
        return { pathLen, straight, duration, efficiency, avgSpeed, meanDt, jitter, points: pts.length };
    }

    // ---------------------------------------------------------------
    // Mouse tracking
    // ---------------------------------------------------------------
    window.addEventListener('mousemove', (e) => {
        const now = performance.now();
        const p = { x: e.clientX, y: e.clientY, t: now };

        if (!currentRun || !lastPoint || (now - lastPoint.t) > IDLE_GAP_MS) {
            startNewRun(p);
        } else {
            addPoint(currentRun, p);
        }
        lastPoint = p;

        selectedRun = currentRun; // live-follow the active run
        renderHistoryList();
        updateStatsPanel(currentRun);
        drawKinematicsGraphs(currentRun);
    });

    // ---------------------------------------------------------------
    // Click tracking (offset from target center)
    // ---------------------------------------------------------------
    window.addEventListener('click', (e) => {
        const target = e.target.closest('.target-btn');
        const clickX = e.clientX;
        const clickY = e.clientY;
        const now = performance.now();

        let clickInfo = { x: clickX, y: clickY, t: now, target: null, dx: null, dy: null, dist: null };

        if (target) {
            const rect = target.getBoundingClientRect();
            const centerX = rect.left + rect.width / 2;
            const centerY = rect.top + rect.height / 2;
            const dx = clickX - centerX;
            const dy = clickY - centerY;
            const dist = Math.hypot(dx, dy);

            clickInfo.target = target.id;
            clickInfo.dx = dx; clickInfo.dy = dy; clickInfo.dist = dist;

            targetClicks[target.id].push({ dx, dy, halfW: rect.width / 2, halfH: rect.height / 2 });
            drawHeatmap(target);

            document.getElementById('s-click').textContent =
                `${dist.toFixed(1)}px (x:${dx > 0 ? '+' : ''}${dx.toFixed(0)}, y:${dy > 0 ? '+' : ''}${dy.toFixed(0)})`;
        }

        // attach to the run that this click belongs to (same idle-gap logic)
        if (currentRun && (now - currentRun.endTime) < IDLE_GAP_MS) {
            currentRun.click = clickInfo;
        } else {
            // click with no preceding movement burst -> its own zero-length run
            const p = { x: clickX, y: clickY, t: now, speed: 0, turn: 0, dt: 0 };
            startNewRun(p);
            currentRun.click = clickInfo;
        }

        renderHistoryList();
        drawKinematicsGraphs(currentRun);
    });

    // ---------------------------------------------------------------
    // Per-target click heatmap
    // ---------------------------------------------------------------
    function drawHeatmap(targetEl) {
        const heat = targetEl.querySelector('.heatmap');
        const hctx = heat.getContext('2d');
        const w = heat.width, h = heat.height;
        hctx.clearRect(0, 0, w, h);
        hctx.strokeStyle = '#30363d';
        hctx.beginPath();
        hctx.moveTo(w / 2, 0); hctx.lineTo(w / 2, h);
        hctx.moveTo(0, h / 2); hctx.lineTo(w, h / 2);
        hctx.stroke();

        const history = targetClicks[targetEl.id];
        history.forEach((c, i) => {
            const nx = (c.dx / c.halfW); // -1..1 roughly
            const ny = (c.dy / c.halfH);
            const px = w / 2 + nx * (w / 2 - 3);
            const py = h / 2 + ny * (h / 2 - 3);
            const isLast = i === history.length - 1;
            hctx.beginPath();
            hctx.arc(px, py, isLast ? 2.5 : 1.6, 0, Math.PI * 2);
            hctx.fillStyle = isLast ? '#f85149' : 'rgba(88,166,255,0.7)';
            hctx.fill();
        });
    }

    // ---------------------------------------------------------------
    // Trajectory canvas (persistent rAF loop -> allows trail fade)
    // ---------------------------------------------------------------
    function drawScene() {
        ctx.clearRect(0, 0, canvas.width, canvas.height);
        const now = performance.now();

        runs.forEach(run => {
            const isSelected = run === selectedRun;
            const pts = run.points;

            for (let i = 1; i < pts.length; i++) {
                const age = now - pts[i].t;
                if (fadeEnabled && age > FADE_MS) continue;
                const alpha = fadeEnabled ? Math.max(0.08, 1 - age / FADE_MS) : (isSelected || !selectedRun ? 1 : 0.15);

                ctx.beginPath();
                ctx.moveTo(pts[i - 1].x, pts[i - 1].y);
                ctx.lineTo(pts[i].x, pts[i].y);
                ctx.strokeStyle = getSpeedColor(pts[i].speed || 0, globalMaxSpeed, alpha);
                ctx.lineWidth = isSelected ? 3 : 2;
                ctx.stroke();

                if (markersEnabled) {
                    ctx.beginPath();
                    ctx.arc(pts[i].x, pts[i].y, 1.5, 0, Math.PI * 2);
                    ctx.fillStyle = `rgba(255,255,255,${alpha})`;
                    ctx.fill();
                }
            }

            // reference straight line start -> end, to expose curvature at a glance
            if (refLineEnabled && pts.length > 2 && (isSelected || !fadeEnabled)) {
                const first = pts[0], last = pts[pts.length - 1];
                const age = now - last.t;
                if (!fadeEnabled || age < FADE_MS) {
                    const alpha = fadeEnabled ? Math.max(0.08, 1 - age / FADE_MS) * 0.5 : 0.35;
                    ctx.beginPath();
                    ctx.setLineDash([4, 4]);
                    ctx.moveTo(first.x, first.y);
                    ctx.lineTo(last.x, last.y);
                    ctx.strokeStyle = `rgba(210,153,34,${alpha})`;
                    ctx.lineWidth = 1;
                    ctx.stroke();
                    ctx.setLineDash([]);
                }
            }

            if (run.click) {
                const age = now - run.click.t;
                if (!fadeEnabled || age < FADE_MS * 2) {
                    const alpha = fadeEnabled ? Math.max(0.15, 1 - age / (FADE_MS * 2)) : 1;
                    ctx.beginPath();
                    ctx.arc(run.click.x, run.click.y, 8, 0, Math.PI * 2);
                    ctx.strokeStyle = `rgba(255,255,255,${alpha})`;
                    ctx.lineWidth = 2;
                    ctx.stroke();
                    ctx.beginPath();
                    ctx.arc(run.click.x, run.click.y, 3, 0, Math.PI * 2);
                    ctx.fillStyle = `rgba(248,81,73,${alpha})`;
                    ctx.fill();

                    if (run.click.target) {
                        const el = document.getElementById(run.click.target);
                        if (el) {
                            const rect = el.getBoundingClientRect();
                            const cx = rect.left + rect.width / 2, cy = rect.top + rect.height / 2;
                            ctx.beginPath();
                            ctx.setLineDash([3, 3]);
                            ctx.moveTo(cx, cy);
                            ctx.lineTo(run.click.x, run.click.y);
                            ctx.strokeStyle = `rgba(255,123,114,${alpha})`;
                            ctx.stroke();
                            ctx.setLineDash([]);
                        }
                        ctx.font = '11px monospace';
                        ctx.fillStyle = `rgba(255,123,114,${alpha})`;
                        ctx.fillText(`Δ: ${run.click.dist.toFixed(1)}px`, run.click.x + 12, run.click.y + 4);
                    }
                }
            }
        });

        requestAnimationFrame(drawScene);
    }
    requestAnimationFrame(drawScene);

    // ---------------------------------------------------------------
    // Kinematics graphs (speed & direction-change vs. real elapsed time)
    // ---------------------------------------------------------------
    function drawKinematicsGraphs(run) {
        if (!run || run.points.length < 2) return;
        const pts = run.points;
        const duration = Math.max(run.endTime - run.startTime, 40);

        // -- speed graph --
        vCtx.clearRect(0, 0, vCanvas.width, vCanvas.height);
        const w = vCanvas.width, h = vCanvas.height;
        const maxV = Math.max(run.maxSpeed, 0.3);

        vCtx.strokeStyle = '#21262d';
        for (let g = 1; g < 4; g++) {
            const gy = h - (g / 4) * (h - 10) - 5;
            vCtx.beginPath(); vCtx.moveTo(0, gy); vCtx.lineTo(w, gy); vCtx.stroke();
        }

        vCtx.beginPath();
        vCtx.strokeStyle = '#58a6ff';
        vCtx.lineWidth = 1.5;
        pts.forEach((p, i) => {
            const x = ((p.t - run.startTime) / duration) * w;
            const y = h - ((p.speed || 0) / maxV) * (h - 10) - 5;
            if (i === 0) vCtx.moveTo(x, y); else vCtx.lineTo(x, y);
        });
        vCtx.stroke();

        if (run.click) {
            const cx = Math.min(w, ((run.click.t - run.startTime) / duration) * w);
            vCtx.beginPath();
            vCtx.strokeStyle = '#f85149';
            vCtx.setLineDash([3, 3]);
            vCtx.moveTo(cx, 0); vCtx.lineTo(cx, h);
            vCtx.stroke();
            vCtx.setLineDash([]);
        }

        // -- direction-change graph --
        tCtx.clearRect(0, 0, tCanvas.width, tCanvas.height);
        const tw = tCanvas.width, th = tCanvas.height;
        tCtx.strokeStyle = '#21262d';
        const midY = th - (90 / 180) * (th - 6) - 3;
        tCtx.beginPath(); tCtx.moveTo(0, midY); tCtx.lineTo(tw, midY); tCtx.stroke();

        tCtx.beginPath();
        tCtx.strokeStyle = '#3fb950';
        tCtx.lineWidth = 1.5;
        pts.forEach((p, i) => {
            const x = ((p.t - run.startTime) / duration) * tw;
            const y = th - ((p.turn || 0) / 180) * (th - 6) - 3;
            if (i === 0) tCtx.moveTo(x, y); else tCtx.lineTo(x, y);
        });
        tCtx.stroke();
    }

    // ---------------------------------------------------------------
    // Stats panel
    // ---------------------------------------------------------------
    function updateStatsPanel(run) {
        const m = runMetrics(run);
        document.getElementById('s-pts').textContent = m.points;
        document.getElementById('s-dur').textContent = m.duration.toFixed(0) + ' ms';
        document.getElementById('s-path').textContent = `${m.pathLen.toFixed(0)} / ${m.straight.toFixed(0)} px`;
        document.getElementById('s-eff').textContent =
            (m.efficiency * 100).toFixed(0) + '% ' + (m.efficiency > 0.97 ? '(почти прямая)' : m.efficiency > 0.8 ? '(лёгкая кривизна)' : '(выраженная кривизна)');
        document.getElementById('s-v').textContent = `${m.avgSpeed.toFixed(2)} / ${run.maxSpeed.toFixed(2)} px/ms`;
        document.getElementById('s-jitter').textContent =
            m.jitter > 0 ? `${m.jitter.toFixed(2)} ms (${m.jitter < 1 ? 'равномерно, похоже на робота' : 'вариативно'})` : '—';
        document.getElementById('s-maxv-all').textContent = globalMaxSpeed.toFixed(2) + ' px/ms';
    }

    // ---------------------------------------------------------------
    // History list
    // ---------------------------------------------------------------
    function renderHistoryList() {
        const list = document.getElementById('history-list');
        list.innerHTML = '';
        for (let i = runs.length - 1; i >= 0; i--) {
            const run = runs[i];
            const m = runMetrics(run);
            const div = document.createElement('div');
            div.className = 'run-entry' + (run === selectedRun ? ' selected' : '');
            const clickTxt = run.click && run.click.dist != null ? `, клик Δ${run.click.dist.toFixed(0)}px` : (run.click ? ', клик мимо мишени' : '');
            div.innerHTML = `<b>Run #${run.id}</b> — ${m.duration.toFixed(0)}ms, ${m.points}pt, лин. ${(m.efficiency * 100).toFixed(0)}%${clickTxt}`;
            div.addEventListener('click', () => {
                selectedRun = run;
                renderHistoryList();
                updateStatsPanel(run);
                drawKinematicsGraphs(run);
            });
            list.appendChild(div);
        }
    }

    // ---------------------------------------------------------------
    // Controls: clear / export
    // ---------------------------------------------------------------
    document.getElementById('btn-clear').addEventListener('click', () => {
        runs = [];
        currentRun = null;
        lastPoint = null;
        selectedRun = null;
        globalMaxSpeed = 0;
        Object.keys(targetClicks).forEach(k => targetClicks[k] = []);
        document.querySelectorAll('.heatmap').forEach(h => h.getContext('2d').clearRect(0, 0, h.width, h.height));
        renderHistoryList();
        vCtx.clearRect(0, 0, vCanvas.width, vCanvas.height);
        tCtx.clearRect(0, 0, tCanvas.width, tCanvas.height);
        document.getElementById('s-click').textContent = '—';
        document.getElementById('s-maxv-all').textContent = '0';
    });

    document.getElementById('btn-export').addEventListener('click', () => {
        const data = {
            exportedAt: new Date().toISOString(),
            runs: runs.map(r => ({
                id: r.id,
                startTime: r.startTime,
                endTime: r.endTime,
                click: r.click,
                points: r.points.map(p => ({ x: p.x, y: p.y, t: p.t, speed: p.speed || 0, turn: p.turn || 0, dt: p.dt || 0 })),
                metrics: runMetrics(r),
            })),
            targetClicks,
        };
        const blob = new Blob([JSON.stringify(data, null, 2)], { type: 'application/json' });
        const url = URL.createObjectURL(blob);
        const a = document.createElement('a');
        a.href = url;
        a.download = `humanize-trace-${Date.now()}.json`;
        a.click();
        URL.revokeObjectURL(url);
    });

    renderHistoryList();

    // ---------------------------------------------------------------
    // Keyboard tracking: dwell (keydown->keyup) & flight (gap before a key)
    // ---------------------------------------------------------------
    const typingInput = document.getElementById('typing-input');
    const flightCanvas = document.getElementById('flightGraph');
    const flightCtx = flightCanvas.getContext('2d');
    const dwellCanvas = document.getElementById('dwellGraph');
    const dwellCtx = dwellCanvas.getContext('2d');

    const KB_IDLE_GAP_MS = 2000; // pause that starts a fresh typing "run"
    let kbEvents = [];           // events of the current typing run
    let kbRunStart = null;
    const pendingKeyDowns = new Map(); // e.code -> {t, key}
    let lastKeyUpTime = null;

    function isTrackedKey(e) {
        return e.key.length === 1 || e.key === 'Backspace' || e.key === 'Enter';
    }

    function stdDev(arr) {
        if (!arr.length) return 0;
        const mean = arr.reduce((a, b) => a + b, 0) / arr.length;
        return Math.sqrt(arr.reduce((a, b) => a + (b - mean) ** 2, 0) / arr.length);
    }

    typingInput.addEventListener('keydown', (e) => {
        if (!isTrackedKey(e) || e.repeat) return;
        const now = performance.now();
        const lastEventTime = kbEvents.length ? kbEvents[kbEvents.length - 1].upT : kbRunStart;
        if (!kbRunStart || (now - lastEventTime) > KB_IDLE_GAP_MS) {
            kbEvents = [];
            kbRunStart = now;
            lastKeyUpTime = null;
        }
        pendingKeyDowns.set(e.code, { t: now, key: e.key });
    });

    typingInput.addEventListener('keyup', (e) => {
        const down = pendingKeyDowns.get(e.code);
        if (!down) return;
        pendingKeyDowns.delete(e.code);
        const now = performance.now();
        const dwell = now - down.t;
        const flight = lastKeyUpTime !== null ? down.t - lastKeyUpTime : null;
        kbEvents.push({ key: down.key, downT: down.t, upT: now, dwell, flight });
        lastKeyUpTime = now;
        updateKeyboardStats();
        drawKeyboardGraphs();
    });

    document.getElementById('btn-kb-clear').addEventListener('click', () => {
        typingInput.value = '';
        kbEvents = [];
        kbRunStart = null;
        lastKeyUpTime = null;
        pendingKeyDowns.clear();
        updateKeyboardStats();
        flightCtx.clearRect(0, 0, flightCanvas.width, flightCanvas.height);
        dwellCtx.clearRect(0, 0, dwellCanvas.width, dwellCanvas.height);
    });

    function updateKeyboardStats() {
        const n = kbEvents.length;
        document.getElementById('kb-count').textContent = n;
        if (!n) {
            document.getElementById('kb-dur').textContent = '0 ms';
            document.getElementById('kb-speed').textContent = '0 CPM';
            document.getElementById('kb-flight').textContent = '— / —';
            document.getElementById('kb-dwell').textContent = '— / —';
            return;
        }
        const duration = Math.max(kbEvents[n - 1].upT - kbRunStart, 1);
        const flights = kbEvents.map(k => k.flight).filter(v => v !== null);
        const dwells = kbEvents.map(k => k.dwell);
        const avgFlight = flights.length ? flights.reduce((a, b) => a + b, 0) / flights.length : 0;
        const avgDwell = dwells.reduce((a, b) => a + b, 0) / dwells.length;
        const cpm = (n / duration) * 60000;

        document.getElementById('kb-dur').textContent = duration.toFixed(0) + ' ms';
        document.getElementById('kb-speed').textContent = `${cpm.toFixed(0)} CPM (~${(cpm / 5).toFixed(0)} WPM)`;
        document.getElementById('kb-flight').textContent =
            flights.length ? `${avgFlight.toFixed(0)} / ${stdDev(flights).toFixed(0)} ms` : '— / —';
        document.getElementById('kb-dwell').textContent = `${avgDwell.toFixed(0)} / ${stdDev(dwells).toFixed(0)} ms`;
    }

    function drawKeyboardGraphs() {
        const n = kbEvents.length;
        if (!n) return;
        const duration = Math.max(kbEvents[n - 1].upT - kbRunStart, 40);

        // flight time: gap before each keystroke -> the typing rhythm
        flightCtx.clearRect(0, 0, flightCanvas.width, flightCanvas.height);
        const fw = flightCanvas.width, fh = flightCanvas.height;
        const flightVals = kbEvents.map(k => k.flight).filter(v => v !== null);
        const maxFlight = Math.max(...flightVals, 60);
        flightCtx.beginPath();
        flightCtx.strokeStyle = '#58a6ff';
        flightCtx.lineWidth = 1.5;
        let started = false;
        kbEvents.forEach((k) => {
            if (k.flight === null) return;
            const x = ((k.downT - kbRunStart) / duration) * fw;
            const y = fh - (Math.min(k.flight, maxFlight) / maxFlight) * (fh - 10) - 5;
            if (!started) { flightCtx.moveTo(x, y); started = true; } else flightCtx.lineTo(x, y);
            flightCtx.fillRect(x - 1.5, y - 1.5, 3, 3);
        });
        flightCtx.stroke();

        // dwell time: how long each key was physically held down
        dwellCtx.clearRect(0, 0, dwellCanvas.width, dwellCanvas.height);
        const dw = dwellCanvas.width, dh = dwellCanvas.height;
        const maxDwell = Math.max(...kbEvents.map(k => k.dwell), 60);
        dwellCtx.beginPath();
        dwellCtx.strokeStyle = '#3fb950';
        dwellCtx.lineWidth = 1.5;
        kbEvents.forEach((k, i) => {
            const x = ((k.downT - kbRunStart) / duration) * dw;
            const y = dh - (Math.min(k.dwell, maxDwell) / maxDwell) * (dh - 10) - 5;
            if (i === 0) dwellCtx.moveTo(x, y); else dwellCtx.lineTo(x, y);
            dwellCtx.fillRect(x - 1.5, y - 1.5, 3, 3);
        });
        dwellCtx.stroke();
    }
})();
</script>
</body>
</html>