// code from goatstore
// api: https://store.agi.bd
const { createCanvas, loadImage } = require("canvas");
const GIFEncoder = require("gifencoder");
const fs = require("fs-extra");
const path = require("path");

const SIZE = 400;
const FRAMES = 24;
const DELAY = 60; // ms per frame

// Fixed particle positions (protiti run-e ekoi thakbe)
const PARTICLES = Array.from({ length: 22 }, (_, i) => ({
	x: (i * 83) % SIZE,
	y: (i * 137) % SIZE,
	r: 2 + (i % 4),
	speed: 0.6 + (i % 5) * 0.25,
	phase: i * 0.7
}));

function drawFrame(ctx, avatar, name, label, f) {
	const t = (f / FRAMES) * Math.PI * 2;

	// 1) background: dhire dhire rong bodlay
	const hue = (f / FRAMES) * 360;
	const bg = ctx.createLinearGradient(0, 0, SIZE, SIZE);
	bg.addColorStop(0, `hsl(${hue}, 70%, 18%)`);
	bg.addColorStop(1, `hsl(${(hue + 60) % 360}, 70%, 8%)`);
	ctx.fillStyle = bg;
	ctx.fillRect(0, 0, SIZE, SIZE);

	// 2) vaschhe emon particle
	for (const p of PARTICLES) {
		const y = (p.y - f * p.speed * (SIZE / FRAMES) + SIZE * 2) % SIZE;
		const x = p.x + Math.sin(t + p.phase) * 12;
		ctx.globalAlpha = 0.35 + 0.35 * Math.sin(t * 2 + p.phase);
		ctx.fillStyle = `hsl(${(hue + 120) % 360}, 90%, 75%)`;
		ctx.beginPath();
		ctx.arc(x, y, p.r, 0, Math.PI * 2);
		ctx.fill();
	}
	ctx.globalAlpha = 1;

	const cx = SIZE / 2;
	const cy = 175;
	const radius = 100;

	// 3) pulse korche emon glow
	const pulse = 1 + 0.06 * Math.sin(t);
	const glow = ctx.createRadialGradient(cx, cy, radius * 0.8, cx, cy, radius * 1.7 * pulse);
	glow.addColorStop(0, `hsla(${(hue + 120) % 360}, 90%, 60%, 0.6)`);
	glow.addColorStop(1, "rgba(0, 0, 0, 0)");
	ctx.fillStyle = glow;
	ctx.beginPath();
	ctx.arc(cx, cy, radius * 1.7 * pulse, 0, Math.PI * 2);
	ctx.fill();

	// 4) ghurche emon ring
	ctx.lineWidth = 6;
	ctx.lineCap = "round";
	for (let i = 0; i < 3; i++) {
		const start = t + (i * Math.PI * 2) / 3;
		ctx.strokeStyle = `hsl(${(hue + i * 40) % 360}, 95%, 65%)`;
		ctx.beginPath();
		ctx.arc(cx, cy, radius + 12, start, start + Math.PI / 3);
		ctx.stroke();
	}

	// 5) avatar (gol kore kata)
	ctx.save();
	ctx.beginPath();
	ctx.arc(cx, cy, radius, 0, Math.PI * 2);
	ctx.closePath();
	ctx.clip();
	ctx.drawImage(avatar, cx - radius, cy - radius, radius * 2, radius * 2);
	ctx.restore();

	ctx.lineWidth = 4;
	ctx.strokeStyle = "#ffffff";
	ctx.beginPath();
	ctx.arc(cx, cy, radius, 0, Math.PI * 2);
	ctx.stroke();

	// 6) label (bounce kore)
	const bounce = Math.sin(t) * 4;
	ctx.textAlign = "center";
	ctx.textBaseline = "middle";
	ctx.font = "bold 40px sans-serif";
	ctx.fillStyle = "#000000";
	ctx.fillText(label, cx + 2, 330 + bounce + 2);
	ctx.fillStyle = `hsl(${(hue + 180) % 360}, 95%, 75%)`;
	ctx.fillText(label, cx, 330 + bounce);

	// 7) nam
	ctx.font = "bold 24px sans-serif";
	ctx.fillStyle = "#ffffff";
	ctx.fillText(name.length > 22 ? name.slice(0, 21) + "…" : name, cx, 372);
}

module.exports = {
	config: {
		name: "animcard",
		aliases: ["gifcard", "agif"],
		version: "1.0",
		author: "Zihad",
		countDown: 15,
		role: 0,
		description: {
			en: "Avatar diye animated GIF card banay (canvas)"
		},
		category: "image",
		guide: {
			en: "{pn}: nijer card"
				+ "\n{pn} @tag: tag kora user-er card"
				+ "\n{pn} <text>: nijer label (jemon: {pn} WELCOME)"
		}
	},

	onStart: async function ({ message, event, args, usersData }) {
		const { senderID, mentions, messageReply } = event;

		let uid = senderID;
		if (messageReply) uid = messageReply.senderID;
		else if (Object.keys(mentions || {}).length > 0)
			uid = Object.keys(mentions)[0];

		// @tag-er nam bad diye baki text-ta label hobe
		let label = args
			.filter(a => !a.startsWith("@"))
			.join(" ")
			.trim()
			.toUpperCase() || "WELCOME";
		if (label.length > 14) label = label.slice(0, 14);

		const name = await usersData.getName(uid);
		const outPath = path.join(__dirname, "tmp", `animcard_${uid}_${Date.now()}.gif`);

		try {
			const avatar = await loadImage(await usersData.getAvatarUrl(uid));
			fs.ensureDirSync(path.dirname(outPath));

			const encoder = new GIFEncoder(SIZE, SIZE);
			const stream = encoder.createReadStream().pipe(fs.createWriteStream(outPath));
			const done = new Promise((resolve, reject) => {
				stream.on("finish", resolve);
				stream.on("error", reject);
			});

			encoder.start();
			encoder.setRepeat(0); // 0 = infinite loop
			encoder.setDelay(DELAY);
			encoder.setQuality(10);

			const canvas = createCanvas(SIZE, SIZE);
			const ctx = canvas.getContext("2d");
			for (let f = 0; f < FRAMES; f++) {
				drawFrame(ctx, avatar, name, label, f);
				encoder.addFrame(ctx);
			}
			encoder.finish();
			await done;

			await message.reply({
				body: `✨ ${name}`,
				attachment: fs.createReadStream(outPath)
			});
		}
		catch (err) {
			console.error("[animcard]", err);
			return message.reply("GIF banate shomossha hoyeche, abar try korun.");
		}
		finally {
			fs.remove(outPath).catch(() => { });
		}
	}
};