const { addToast } = useToast();

const canvasRef = useRef(null);

// --- Parameters ---

const [depth, setDepth] = useState(10);

const [angle, setAngle] = useState(25);

const [lengthBase, setLengthBase] = useState(120);

const [lengthMultiplier, setLengthMultiplier] = useState(0.7);

const [asymmetry, setAsymmetry] = useState(0); // -10 to 10 degrees bias

const [randomness, setRandomness] = useState(0.2); // 0 to 1

const [season, setSeason] = useState('summer'); // summer, autumn, winter, spring, neon

// --- Animation State ---

// progress value for animation (0 to 1) omitted if not used

const drawTree = useCallback(

(ctx, w, h) => {

ctx.clearRect(0, 0, w, h);

// Color Palettes

const palettes = {

summer: { trunk: '#5D4037', leaf: '#4CAF50', bg: '#E8F5E9' },

autumn: { trunk: '#3E2723', leaf: '#FF5722', bg: '#FFF3E0' },

winter: { trunk: '#212121', leaf: '#B0BEC5', bg: '#ECEFF1' },

spring: { trunk: '#795548', leaf: '#F48FB1', bg: '#FCE4EC' },

neon: { trunk: '#EA00FF', leaf: '#00E5FF', bg: '#120024' },

};

const theme = palettes[season];

// Draw Background

ctx.fillStyle = theme.bg;

ctx.fillRect(0, 0, w, h);

const maxDepth = depth;

// Recursive Function

const branch = (x, y, len, ang, d) => {

ctx.beginPath();

ctx.save();

ctx.strokeStyle = d > 2 ? theme.trunk : theme.leaf;

ctx.fillStyle = theme.leaf;

ctx.lineWidth = d > 2 ? d : 1;

ctx.lineCap = 'round';

ctx.translate(x, y);

ctx.rotate((ang * Math.PI) / 180);

ctx.moveTo(0, 0);

ctx.lineTo(0, -len);

ctx.stroke();

if (d > 0) {

// Leaves at the end

if (d <= 2) {

ctx.beginPath();

ctx.arc(0, -len, 4 * (randomness + 0.5), 0, Math.PI * 2);

ctx.fill();

}

// Calculate next branch props

// Add randomness to length and angle

const randLen = 1 + (Math.random() - 0.5) * randomness;

const randAng = (Math.random() - 0.5) * randomness * 30;

const nextLen = len * lengthMultiplier * randLen;

// Right branch

branch(0, -len, nextLen, angle + asymmetry + randAng, d - 1);

// Left branch

branch(0, -len, nextLen, -angle + asymmetry + randAng, d - 1);

// Optional middle branch for lushness if randomness is high

if (randomness > 0.6 && d > 4) {

branch(0, -len, nextLen * 0.8, randAng, d - 2);

}

}

ctx.restore();

};

// Start the tree at bottom center

branch(w / 2, h, lengthBase, 0, maxDepth);

},

[depth, angle, lengthBase, lengthMultiplier, asymmetry, randomness, season],

);

// Effect to redraw when params change

useEffect(() => {

const canvas = canvasRef.current;

if (!canvas) return;

const ctx = canvas.getContext('2d');

const width = canvas.width;

const height = canvas.height;

// Use a timeout to debounce slightly or just draw immediately

// RequestAnimationFrame ensures we don't block UI

let rafId = requestAnimationFrame(() => drawTree(ctx, width, height));

return () => cancelAnimationFrame(rafId);

}, [drawTree]);

// Init Canvas Size

useEffect(() => {

const canvas = canvasRef.current;

if (canvas) {

// High res for sharpness

canvas.width = 800;

canvas.height = 600;

}

}, []);

const handleDownload = () => {

const canvas = canvasRef.current;

const link = document.createElement('a');

link.download = `fractal_flora_${season}.png`;

link.href = canvas.toDataURL();

link.click();

addToast({

title: 'Saved',

message: 'Tree saved to device.',

duration: 3000,

});

};

const randomizeParams = () => {

setAngle(15 + Math.random() * 40);

setLengthMultiplier(0.6 + Math.random() * 0.2);

setAsymmetry((Math.random() - 0.5) * 20);

setRandomness(Math.random() * 0.8);

const seasons = ['summer', 'autumn', 'winter', 'spring', 'neon'];

setSeason(seasons[Math.floor(Math.random() * seasons.length)]);

};

return (

<div className="min-h-screen bg-gray-50 flex flex-col">

<Seo

title="Fractal Flora | Fezcodex"

description="Grow digital trees using recursive mathematics."

keywords={['fractal', 'tree', 'recursive', 'generative art', 'math']}

/>

<div className="container mx-auto px-4 py-8 flex-grow flex flex-col max-w-6xl">

{/* Header */}

<Link

to="/apps"

className="group text-primary-400 hover:underline flex items-center justify-center gap-2 text-lg mb-4"

>

<ArrowLeftIcon className="text-xl transition-transform group-hover:-translate-x-1" />{' '}

Back to Apps

</Link>

<BreadcrumbTitle title="Fractal Flora" slug="flora" />

<div className="grid grid-cols-1 lg:grid-cols-3 gap-8 flex-grow">

{/* Controls */}

<div className="space-y-6 bg-white p-6 rounded-xl shadow-md border border-gray-200 h-fit">

<div className="flex gap-2 mb-4">

<button

onClick={randomizeParams}

className="flex-1 py-2 px-4 bg-purple-600 text-white rounded-lg hover:bg-purple-700 flex items-center justify-center gap-2 transition-colors"

>

<ArrowsClockwise size={20} /> Randomize

</button>

<button

onClick={handleDownload}

className="px-4 py-2 bg-gray-100 text-gray-600 rounded-lg hover:bg-gray-200"

title="Download"

>

<DownloadSimple size={24} />

</button>

</div>

{/* Season Selector */}

<div className="flex gap-2 justify-between p-1 bg-gray-100 rounded-lg">

{['spring', 'summer', 'autumn', 'winter', 'neon'].map((s) => (

<button

key={s}

onClick={() => setSeason(s)}

className={`flex-1 py-1 rounded-md text-xs font-bold uppercase transition-all ${season === s ? 'bg-white shadow-sm text-gray-900' : 'text-gray-400 hover:text-gray-600'}`}

>

{s}

</button>

))}

</div>

<div className="space-y-4">

<div>

<label className="flex justify-between text-sm font-medium text-gray-700 mb-1">

<span>Recursion Depth</span>

<span className="text-gray-500">{depth}</span>

</label>

<input

type="range"

min="1"

max="14"

value={depth}

onChange={(e) => setDepth(Number(e.target.value))}

className="w-full accent-green-600"

/>

</div>

<div>

<label className="flex justify-between text-sm font-medium text-gray-700 mb-1">

<span>Branch Angle</span>

<span className="text-gray-500">{Math.round(angle)}°</span>

</label>

<input

type="range"

min="0"

max="120"

value={angle}

onChange={(e) => setAngle(Number(e.target.value))}

className="w-full accent-green-600"

/>

</div>

<div>

<label className="flex justify-between text-sm font-medium text-gray-700 mb-1">

<span>Length Multiplier</span>

<span className="text-gray-500">

{lengthMultiplier.toFixed(2)}

</span>

</label>

<input

type="range"

min="0.5"

max="0.85"

step="0.01"

value={lengthMultiplier}

onChange={(e) => setLengthMultiplier(Number(e.target.value))}

className="w-full accent-green-600"

/>

</div>

<div>

<label className="flex justify-between text-sm font-medium text-gray-700 mb-1">

<span>Trunk Base Size</span>

<span className="text-gray-500">{lengthBase}px</span>

</label>

<input

type="range"

min="50"

max="200"

value={lengthBase}

onChange={(e) => setLengthBase(Number(e.target.value))}

className="w-full accent-green-600"

/>

</div>

<div>

<label className="flex justify-between text-sm font-medium text-gray-700 mb-1">

<span>Wind / Asymmetry</span>

<span className="text-gray-500">

{Math.round(asymmetry)}°

</span>

</label>

<input

type="range"

min="-20"

max="20"

value={asymmetry}

onChange={(e) => setAsymmetry(Number(e.target.value))}

className="w-full accent-blue-500"

/>

</div>

<div>

<label className="flex justify-between text-sm font-medium text-gray-700 mb-1">

<span>Organic Randomness</span>

<span className="text-gray-500">

{Math.round(randomness * 100)}%

</span>

</label>

<input

type="range"

min="0"

max="1"

step="0.01"

value={randomness}

onChange={(e) => setRandomness(Number(e.target.value))}

className="w-full accent-orange-500"

/>

</div>

</div>

<div className="bg-green-50 p-3 rounded-lg text-xs text-green-800">

<strong>Fact:</strong> Nature uses fractals to maximize surface

area for sunlight (leaves) and nutrients (roots) efficiently!

</div>

</div>

{/* Canvas */}

<div className="lg:col-span-2 bg-white rounded-xl shadow-lg border border-gray-200 p-4 flex items-center justify-center overflow-hidden">

<canvas

ref={canvasRef}

className="max-w-full h-auto rounded-lg shadow-inner border border-gray-100"

style={{ maxHeight: '600px' }}

/>

</div>

</div>

</div>

</div>

);