src/app/api/chat/route.ts

import { NextResponse } from 'next/server';

export async function POST(req: Request) {
  try {
    const { message, history } = await req.json();
    const apiKey = process.env.GEMINI_API_KEY;

    const response = await fetch(`https://generativelanguage.googleapis.com/v1beta/models/gemini-pro:generateContent?key=${apiKey}`, {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({
        contents: [
          ...history.map(m => ({
            role: m.role === 'assistant' ? 'model' : 'user',
            parts: [{ text: m.content }]
          })),
          { role: 'user', parts: [{ text: message }] }
        ]
      })
    });

    const data = await response.json();
    const text = data.candidates?.[0]?.content?.parts?.[0]?.text || "عذراً، لم أستطع استنباط إجابة حالياً.";

    return NextResponse.json({ text });
  } catch (error) {
    return NextResponse.json({ error: 'Failed to fetch Gemini' }, { status: 500 });
  }
}