/**
 * Copyright 2025 Google LLC
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

// Next.js API route support: https://nextjs.org/docs/api-routes/introduction

import { GoogleGenerativeAI } from "@google/generative-ai";

const MODEL_NAME = "gemini-2.0-flash-exp";

export const config = {
  api: {
    bodyParser: {
      sizeLimit: '10mb',
    },
  },
};

export default async function handler(req, res) {
  if (req.method !== 'POST') {
    return res.status(405).json({ error: 'Method not allowed' });
  }

  try {
    const { imageBase64, prompt, userInput } = req.body;

    const genAI = new GoogleGenerativeAI(process.env.GEMINI_API_KEY);
    const model = genAI.getGenerativeModel({ model: MODEL_NAME });

    const image = {
      inlineData: {
        data: imageBase64.split(",")[1],
        mimeType: "image/jpeg",
      },
    };

    const finalPrompt = userInput.trim()
      ? `${prompt}\n\nUser input: ${userInput}`
      : prompt;

    const result = await model.generateContent([finalPrompt, image]);
    const response = result.response.text();

    const regex = /```(?:javascript|js)?\s*([\s\S]*?)```/g;
    const match = regex.exec(response);
    const extractedCode = match ? match[1].trim() : response;

    res.status(200).json({
      fullResponse: response,
      code: extractedCode
    });
  } catch (error) {
    console.error('Error:', error);
    res.status(500).json({ error: 'Failed to generate code' });
  }
}