import { randomUUID } from "node:crypto";
import { mkdir } from "node:fs/promises";
import { join } from "node:path";
import { Hono } from "hono";

const ALLOWED_TYPES = ["image/jpeg", "image/png", "image/webp"];
const MAX_SIZE = 5 * 1024 * 1024; // 5MB

const app = new Hono();

app.post("/", async (c) => {
	const body = await c.req.parseBody();
	const file = body.image;

	if (!file || typeof file === "string") {
		return c.json({ error: "No image file provided" }, 400);
	}

	// Validate file type
	if (!ALLOWED_TYPES.includes(file.type)) {
		return c.json(
			{ error: "Invalid file type. Accepted: jpeg, png, webp" },
			400,
		);
	}

	// Validate file size
	if (file.size > MAX_SIZE) {
		return c.json({ error: "File too large. Maximum size is 5MB" }, 400);
	}

	// Generate unique filename
	const ext =
		file.type.split("/")[1] === "jpeg" ? "jpg" : file.type.split("/")[1];
	const filename = `${Date.now()}-${randomUUID()}.${ext}`;

	// Ensure uploads directory exists
	await mkdir("uploads", { recursive: true });

	// Write file
	const buffer = await file.arrayBuffer();
	await Bun.write(join("uploads", filename), buffer);

	return c.json({ filename }, 201);
});

export { app as imageRoutes };