import { NextResponse } from "next/server";

export async function POST(request: Request) {
	try {
		const { events } = await request.json();

		if (!events || !Array.isArray(events)) {
			return NextResponse.json(
				{ error: "Invalid events array" },
				{ status: 400 },
			);
		}

		const res = await fetch("https://openrouter.ai/api/v1/chat/completions", {
			method: "POST",
			headers: {
				Authorization: `Bearer ${process.env.OPENROUTER_API_KEY}`, // Server-side only
				"Content-Type": "application/json",
			},
			body: JSON.stringify({
				model: "@preset/i-cal-editor-summarize", // FREE model
				messages: [
					{
						role: "system",
						content: `You summarize a list of events in natural language. Include date, time, and title. Be concise.`,
					},
					{ role: "user", content: JSON.stringify(events) },
				],
				temperature: 0.4,
				// max_tokens: 300,
			}),
		});

		const data = await res.json();
		const summary =
			data?.choices?.[0]?.message?.content || "No summary generated.";
		return NextResponse.json({ summary });
	} catch (error) {
		console.error(error);
		return NextResponse.json(
			{ error: "Failed to summarize events" },
			{ status: 500 },
		);
	}
}