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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Complex Stable Life 3D</title>
    <link href="https://fonts.googleapis.com/css2?family=Inter:wght@300;500;700&display=swap" rel="stylesheet">
    <style>
        :root {
            --primary: #00d2d3; /* Cyan/Teal for a sci-fi biological look */
            --glass-bg: rgba(10, 15, 20, 0.8);
            --glass-border: rgba(255, 255, 255, 0.08);
            --text: #f1f5f9;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            user-select: none;
        }

        body {
            overflow: hidden;
            background-color: #050505;
            font-family: 'Inter', sans-serif;
            color: var(--text);
        }

        /* Canvas */
        #canvas-container {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            z-index: 1;
            background: radial-gradient(circle at center, #111 0%, #000 100%);
        }

        /* Header Link */
        .brand-link {
            position: fixed;
            top: 20px;
            left: 50%;
            transform: translateX(-50%);
            z-index: 100;
            color: var(--text);
            text-decoration: none;
            font-weight: 600;
            font-size: 0.85rem;
            background: var(--glass-bg);
            padding: 8px 20px;
            border-radius: 30px;
            border: 1px solid var(--glass-border);
            backdrop-filter: blur(12px);
            transition: all 0.3s ease;
            letter-spacing: 0.5px;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
        }

        .brand-link:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(255, 255, 255, 0.3);
            box-shadow: 0 0 15px var(--primary);
        }

        /* UI Overlay */
        .ui-panel {
            position: fixed;
            top: 20px;
            right: 20px;
            width: 340px;
            background: var(--glass-bg);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--glass-border);
            border-radius: 16px;
            padding: 24px;
            z-index: 10;
            display: flex;
            flex-direction: column;
            gap: 16px;
            box-shadow: 0 20px 40px rgba(0,0,0,0.4);
            max-height: 90vh;
            overflow-y: auto;
            transition: transform 0.3s ease;
        }

        .panel-header h1 {
            font-size: 1.2rem;
            font-weight: 700;
            background: linear-gradient(135deg, #fff, var(--primary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            margin-bottom: 4px;
        }
        
        .panel-header p {
            font-size: 0.75rem;
            color: #94a3b8;
        }

        .control-group {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        label {
            font-size: 0.75rem;
            color: #cbd5e1;
            display: flex;
            justify-content: space-between;
            font-weight: 500;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }
        
        .value-tag {
            color: var(--primary);
            font-family: monospace;
            font-size: 0.85rem;
        }

        input[type="range"] {
            -webkit-appearance: none;
            width: 100%;
            height: 4px;
            background: rgba(255,255,255,0.1);
            border-radius: 2px;
            outline: none;
        }

        input[type="range"]::-webkit-slider-thumb {
            -webkit-appearance: none;
            width: 14px;
            height: 14px;
            border-radius: 50%;
            background: var(--primary);
            cursor: pointer;
            transition: transform 0.2s;
            box-shadow: 0 0 10px rgba(0, 210, 211, 0.5);
        }

        input[type="range"]::-webkit-slider-thumb:hover {
            transform: scale(1.2);
        }

        .btn-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 8px;
        }

        button {
            background: rgba(255,255,255,0.03);
            border: 1px solid var(--glass-border);
            color: #e2e8f0;
            padding: 10px;
            border-radius: 8px;
            cursor: pointer;
            font-weight: 600;
            font-size: 0.8rem;
            transition: all 0.2s ease;
            font-family: 'Inter', sans-serif;
        }

        button:hover {
            background: rgba(255,255,255,0.08);
            border-color: rgba(255,255,255,0.2);
        }
        
        button.primary {
            background: var(--primary);
            color: #000;
            border: none;
            box-shadow: 0 4px 12px rgba(0, 210, 211, 0.3);
        }
        
        button.primary:hover {
            background: #48dbfb;
            transform: translateY(-1px);
        }

        .checkbox-group {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.75rem;
            color: #94a3b8;
            cursor: pointer;
            padding: 5px 0;
        }
        
        .checkbox-group input {
            accent-color: var(--primary);
            width: 14px;
            height: 14px;
        }

        .stats {
            font-size: 0.7rem;
            color: #576574;
            text-align: center;
            padding-top: 10px;
            border-top: 1px solid var(--glass-border);
            font-family: monospace;
        }

        /* Loading overlay */
        #loading {
            position: fixed;
            top: 0; left: 0; width: 100%; height: 100%;
            background: #000;
            z-index: 200;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            color: var(--primary);
            transition: opacity 0.8s ease-out;
            pointer-events: none;
            font-weight: 300;
            letter-spacing: 2px;
        }

        @media (max-width: 600px) {
            .ui-panel {
                width: calc(100% - 30px);
                right: 15px;
                bottom: 20px;
                top: auto;
                max-height: 55vh;
            }
            .brand-link {
                top: 10px;
                padding: 6px 16px;
            }
        }
    </style>
    
    <script type="importmap">
        {
            "imports": {
                "three": "https://unpkg.com/three@0.160.0/build/three.module.js",
                "three/addons/": "https://unpkg.com/three@0.160.0/examples/jsm/"
            }
        }
    </script>
</head>
<body>

    <a href="https://huggingface.co/spaces/akhaliq/anycoder" target="_blank" class="brand-link">Built with anycoder</a>

    <div id="loading">
        <div>GENERATING COMPLEXITY</div>
    </div>
    
    <div id="canvas-container"></div>

    <div class="ui-panel" id="uiPanel">
        <div class="panel-header">
            <h1>Complex Life Engine</h1>
            <p>Large Scale Structure Simulation</p>
        </div>

        <div class="control-group">
            <label>Particles <span id="val-count" class="value-tag">1400</span></label>
            <input type="range" id="inp-count" min="500" max="2500" step="100" value="1400">
        </div>

        <div class="control-group">
            <label>Interaction Radius <span id="val-radius" class="value-tag">80</span></label>
            <input type="range" id="inp-radius" min="30" max="150" value="80">
        </div>

        <div class="control-group">
            <label>Force Strength <span id="val-force" class="value-tag">0.6</span></label>
            <input type="range" id="inp-force" min="0.1" max="3.0" step="0.1" value="0.6">
        </div>

        <div class="control-group">
            <label>Friction (Stability) <span id="val-friction" class="value-tag">0.88</span></label>
            <input type="range" id="inp-friction" min="0.50" max="0.98" step="0.01" value="0.88">
        </div>
        
        <label class="checkbox-group">
            <input type="checkbox" id="inp-symmetric" checked>
            Symmetric Rules (Physics Law)
        </label>

        <button id="btn-randomize" class="primary">🎲 Evolve New Rules</button>
        
        <div class="btn-grid">
            <button id="btn-complex">🧬 Complex</button>
            <button id="btn-membranes">🕸️ Membranes</button>
        </div>
        <div class="btn-grid">
            <button id="btn-snake">🐍 Snake</button>
            <button id="btn-cells">🦠 Cells</button>
        </div>

        <div class="stats" id="stats">
            Initializing...
        </div>
    </div>

    <script type="module">
        import * as THREE from 'three';
        import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
        import { EffectComposer } from 'three/addons/postprocessing/EffectComposer.js';
        import { RenderPass } from 'three/addons/postprocessing/RenderPass.js';
        import { UnrealBloomPass } from 'three/addons/postprocessing/UnrealBloomPass.js';

        // --- Configuration ---
        const CONFIG = {
            particleCount: 1400,
            types: 6, 
            radius: 80,       // High radius for larger structures
            forceFactor: 0.6, // Lower force to balance high radius
            friction: 0.88,   // High friction to stabilize large structures
            worldSize: 300,   // Larger world
            symmetric: true,
            maxSpeed: 2.5,
            repulsionRadius: 0.3 // Distance where particles strongly push apart
        };

        // --- State ---
        let particles = [];
        let rules = []; 
        let typeColors = [];
        
        // --- Three.js Setup ---
        const container = document.getElementById('canvas-container');
        const scene = new THREE.Scene();
        scene.fog = new THREE.FogExp2(0x000000, 0.0015);

        const camera = new THREE.PerspectiveCamera(50, window.innerWidth / window.innerHeight, 0.1, 1500);
        camera.position.set(0, 200, 400);

        const renderer = new THREE.WebGLRenderer({ antialias: false, powerPreference: "high-performance" });
        renderer.setSize(window.innerWidth, window.innerHeight);
        renderer.setPixelRatio(Math.min(window.devicePixelRatio, 2));
        container.appendChild(renderer.domElement);

        // Post-processing
        const renderScene = new RenderPass(scene, camera);
        const bloomPass = new UnrealBloomPass(new THREE.Vector2(window.innerWidth, window.innerHeight), 1.5, 0.4, 0.85);
        bloomPass.threshold = 0.1;
        bloomPass.strength = 0.8; // Stronger bloom for sci-fi effect
        bloomPass.radius = 0.5;

        const composer = new EffectComposer(renderer);
        composer.addPass(renderScene);
        composer.addPass(bloomPass);

        const controls = new OrbitControls(camera, renderer.domElement);
        controls.enableDamping = true;
        controls.autoRotate = true;
        controls.autoRotateSpeed = 0.3;

        // Lights
        const ambientLight = new THREE.AmbientLight(0x222222);
        scene.add(ambientLight);
        
        const lights = [];
        const lightColors = [0x00d2d3, 0xff9ff3, 0xfeca57];
        for(let i=0; i<3; i++) {
            const l = new THREE.PointLight(lightColors[i], 1, 500);
            l.position.set(
                (Math.random()-0.5)*300,
                (Math.random()-0.5)*300,
                (Math.random()-0.5)*300
            );
            scene.add(l);
            lights.push(l);
        }

        // --- Particle System ---
        const geometry = new THREE.SphereGeometry(1, 8, 8); // Low poly is fine with bloom
        const material = new THREE.MeshBasicMaterial({ color: 0xffffff }); // Basic material is faster
        
        let instancedMesh;
        const dummy = new THREE.Object3D();
        const _color = new THREE.Color();

        // --- Logic ---

        function initSystem() {
            if (instancedMesh) {
                scene.remove(instancedMesh);
                instancedMesh.dispose();
            }

            // Distinct color palette
            typeColors = [
                new THREE.Color(0x00d2d3), // Cyan
                new THREE.Color(0xff6b6b), // Red
                new THREE.Color(0xfeca57), // Yellow
                new THREE.Color(0x5f27cd), // Purple
                new THREE.Color(0x54a0ff), // Blue
                new THREE.Color(0x1dd1a1)  // Green
            ];
            
            particles = new Float32Array(CONFIG.particleCount * 8); 
            
            for (let i = 0; i < CONFIG.particleCount; i++) {
                const i8 = i * 8;
                particles[i8] = (Math.random() - 0.5) * CONFIG.worldSize;
                particles[i8+1] = (Math.random() - 0.5) * CONFIG.worldSize;
                particles[i8+2] = (Math.random() - 0.5) * CONFIG.worldSize;
                particles[i8+3] = 0; // vx
                particles[i8+4] = 0; // vy
                particles[i8+5] = 0; // vz
                particles[i8+6] = Math.floor(Math.random() * CONFIG.types); // type
                particles[i8+7] = 1.0; // Scale placeholder
            }

            instancedMesh = new THREE.InstancedMesh(geometry, material, CONFIG.particleCount);
            instancedMesh.instanceMatrix.setUsage(THREE.DynamicDrawUsage);
            scene.add(instancedMesh);

            randomizeRules();
            
            setTimeout(() => {
                document.getElementById('loading').style.opacity = 0;
            }, 500);
        }

        function randomizeRules(mode = 'random') {
            rules = [];
            for (let i = 0; i < CONFIG.types; i++) {
                rules[i] = [];
                for (let j = 0; j < CONFIG.types; j++) {
                    if (mode === 'discrete') {
                        // Discrete steps create sharper structures
                        const steps = [-1.0, -0.5, 0.0, 0.2, 0.5, 0.8]; 
                        rules[i][j] = steps[Math.floor(Math.random() * steps.length)];
                    } else {
                        rules[i][j] = Math.random() * 2 - 1;
                    }
                }
            }

            if (CONFIG.symmetric) {
                for (let i = 0; i < CONFIG.types; i++) {
                    for (let j = i + 1; j < CONFIG.types; j++) {
                        rules[j][i] = rules[i][j];
                    }
                    // Self-interaction usually needs to be slightly repulsive or weakly attractive for volume
                    rules[i][i] = Math.max(-1.0, Math.min(0.5, rules[i][i])); 
                }
            }
        }

        function setPreset(name) {
            // Base settings for stability
            CONFIG.symmetric = true;
            document.getElementById('inp-symmetric').checked = true;

            if (name === 'complex') {
                // Large, slow-moving complex structures
                CONFIG.radius = 90;
                CONFIG.friction = 0.88;
                CONFIG.forceFactor = 0.5;
                CONFIG.maxSpeed = 2.0;
                CONFIG.repulsionRadius = 0.3;
                randomizeRules('discrete');
            } else if (name === 'membranes') {
                // Sheet-like structures
                CONFIG.radius = 70;
                CONFIG.friction = 0.82;
                CONFIG.forceFactor = 0.8;
                CONFIG.maxSpeed = 3.0;
                CONFIG.repulsionRadius = 0.25;
                // Generate specific membrane rules
                randomizeRules();
                // Hack: enforce some strong chains
                for(let i=0; i<CONFIG.types; i++) {
                    rules[i][i] = 0.6; // Like self
                    rules[i][(i+1)%CONFIG.types] = 0.2;
                }
            } else if (name === 'snake') {
                CONFIG.radius = 60;
                CONFIG.friction = 0.85;
                CONFIG.forceFactor = 1.2;
                randomizeRules();
            } else if (name === 'cells') {
                 // High repulsion short range, high attraction long range
                CONFIG.radius = 100;
                CONFIG.friction = 0.90; // Very stable
                CONFIG.forceFactor = 0.4;
                randomizeRules('discrete');
            }
            updateUiValues();
        }

        // --- Physics Loop ---
        
        function updatePhysics() {
            const count = CONFIG.particleCount;
            const rMax = CONFIG.radius;
            const rMaxSq = rMax * rMax;
            const forceFactor = CONFIG.forceFactor;
            const friction = CONFIG.friction;
            const worldSize = CONFIG.worldSize;
            const halfWorld = worldSize / 2;
            const maxSpeed = CONFIG.maxSpeed;
            const repulsionRad = CONFIG.repulsionRadius; // 0.0 to 1.0 of rMax

            for (let i = 0; i < count; i++) {
                const i8 = i * 8;
                let fx = 0, fy = 0, fz = 0;
                const typeI = particles[i8+6];
                
                const px = particles[i8];
                const py = particles[i8+1];
                const pz = particles[i8+2];

                for (let j = 0; j < count; j++) {
                    if (i === j) continue;
                    
                    const j8 = j * 8;
                    let dx = particles[j8] - px;
                    let dy = particles[j8+1] - py;
                    let dz = particles[j8+2] - pz;

                    // Toroidal Wrap
                    if (dx > halfWorld) dx -= worldSize;
                    else if (dx < -halfWorld) dx += worldSize;
                    if (dy > halfWorld) dy -= worldSize;
                    else if (dy < -halfWorld) dy += worldSize;
                    if (dz > halfWorld) dz -= worldSize;
                    else if (dz < -halfWorld) dz += worldSize;

                    const distSq = dx*dx + dy*dy + dz*dz;

                    if (distSq > 0.01 && distSq < rMaxSq) {
                        const dist = Math.sqrt(distSq);
                        const q = dist / rMax; 
                        const typeJ = particles[j8+6];
                        
                        let f = 0;
                        
                        // STABILITY LOGIC:
                        // 1. Strong Repulsion Zone (The Core)
                        if (q < repulsionRad) {
                            // Normalize q to 0..1 within the repulsion zone
                            const subQ = q / repulsionRad;
                            // Force scales up massively as we get closer to 0
                            f = (subQ - 1.0) * 2.0; 
                        } else {
                            // 2. Interaction Zone
                            // Normalize q to 0..1 within interaction zone
                            const subQ = (q - repulsionRad) / (1.0 - repulsionRad);
                            
                            // Peak curve: 0 at edges, 1 in middle
                            const strength = rules[typeI][typeJ];
                            
                            // Smooth transition curve
                            f = strength * (1.0 - Math.abs(2.0 * subQ - 1.0));
                            
                            // Alternative: Linear falloff
                            // f = strength * (1.0 - subQ);
                        }

                        // Apply force
                        const fScaled = (f * forceFactor) / dist;
                        fx += dx * fScaled;
                        fy += dy * fScaled;
                        fz += dz * fScaled;
                    }
                }

                // Integration
                particles[i8+3] = (particles[i8+3] + fx) * friction;
                particles[i8+4] = (particles[i8+4] + fy) * friction;
                particles[i8+5] = (particles[i8+5] + fz) * friction;

                // Velocity Cap
                const vx = particles[i8+3];
                const vy = particles[i8+4];
                const vz = particles[i8+5];
                const speedSq = vx*vx + vy*vy + vz*vz;
                
                if (speedSq > maxSpeed * maxSpeed) {
                    const scale = maxSpeed / Math.sqrt(speedSq);
                    particles[i8+3] *= scale;
                    particles[i8+4] *= scale;
                    particles[i8+5] *= scale;
                }

                // Position Update
                particles[i8] += particles[i8+3];
                particles[i8+1] += particles[i8+4];
                particles[i8+2] += particles[i8+5];

                // Boundary Wrap
                if (particles[i8] <= -halfWorld) particles[i8] += worldSize;
                if (particles[i8] >= halfWorld) particles[i8] -= worldSize;
                if (particles[i8+1] <= -halfWorld) particles[i8+1] += worldSize;
                if (particles[i8+1] >= halfWorld) particles[i8+1] -= worldSize;
                if (particles[i8+2] <= -halfWorld) particles[i8+2] += worldSize;
                if (particles[i8+2] >= halfWorld) particles[i8+2] -= worldSize;
            }
        }

        function updateVisuals() {
            const count = CONFIG.particleCount;
            const rMax = CONFIG.radius;
            
            for (let i = 0; i < count; i++) {
                const i8 = i * 8;
                
                dummy.position.set(
                    particles[i8],
                    particles[i8+1],
                    particles[i8+2]
                );

                // Dynamic sizing based on neighbors/density could be cool, 
                // but for now let's scale based on interaction radius to keep it looking "structural"
                // Smaller particles look better for large structures
                const scale = rMax / 35.0; 
                dummy.scale.set(scale, scale, scale);
                dummy.updateMatrix();
                
                instancedMesh.setMatrixAt(i, dummy.matrix);
                
                const type = particles[i8+6];
                _color.copy(typeColors[type]);
                
                instancedMesh.setColorAt(i, _color);
            }
            instancedMesh.instanceMatrix.needsUpdate = true;
            if(instancedMesh.instanceColor) instancedMesh.instanceColor.needsUpdate = true;
        }

        // --- Loop ---
        const statsEl = document.getElementById('stats');
        let frames = 0;
        let lastTime = 0;

        function animate(time) {
            requestAnimationFrame(animate);

            frames++;
            if (time - lastTime > 1000) {
                statsEl.innerText = `FPS: ${frames} | Radius: ${CONFIG.radius} | Friction: ${CONFIG.friction}`;
                frames = 0;
                lastTime = time;
            }

            updatePhysics();
            updateVisuals();
            controls.update();
            composer.render();
        }

        // --- UI Handlers ---
        
        document.getElementById('inp-count').addEventListener('change', (e) => {
            CONFIG.particleCount = parseInt(e.target.value);
            document.getElementById('val-count').innerText = CONFIG.particleCount;
            initSystem();
        });

        document.getElementById('inp-radius').addEventListener('input', (e) => {
            CONFIG.radius = parseInt(e.target.value);
            document.getElementById('val-radius').innerText = CONFIG.radius;
        });

        document.getElementById('inp-force').addEventListener('input', (e) => {
            CONFIG.forceFactor = parseFloat(e.target.value);
            document.getElementById('val-force').innerText = CONFIG.forceFactor;
        });

        document.getElementById('inp-friction').addEventListener('input', (e) => {
            CONFIG.friction = parseFloat(e.target.value);
            document.getElementById('val-friction').innerText = CONFIG.friction;
        });

        document.getElementById('inp-symmetric').addEventListener('change', (e) => {
            CONFIG.symmetric = e.target.checked;
        });

        document.getElementById('btn-randomize').addEventListener('click', () => {
            randomizeRules('discrete');
        });

        document.getElementById('btn-complex').addEventListener('click', () => setPreset('complex'));
        document.getElementById('btn-membranes').addEventListener('click', () => setPreset('membranes'));
        document.getElementById('btn-snake').addEventListener('click', () => setPreset('snake'));
        document.getElementById('btn-cells').addEventListener('click', () => setPreset('cells'));

        function updateUiValues() {
            document.getElementById('inp-friction').value = CONFIG.friction;
            document.getElementById('val-friction').innerText = CONFIG.friction;
            document.getElementById('inp-force').value = CONFIG.forceFactor;
            document.getElementById('val-force').innerText = CONFIG.forceFactor;
            document.getElementById('inp-radius').value = CONFIG.radius;
            document.getElementById('val-radius').innerText = CONFIG.radius;
        }

        window.addEventListener('resize', () => {
            camera.aspect = window.innerWidth / window.innerHeight;
            camera.updateProjectionMatrix();
            renderer.setSize(window.innerWidth, window.innerHeight);
            composer.setSize(window.innerWidth, window.innerHeight);
        });

        // Initial Boot
        initSystem();
        // Set initial complex preset
        setPreset('complex');
        animate(0);

    </script>
</body>
</html>