import { GoogleGenAI } from "@google/genai";

const ai = new GoogleGenAI({});

const prompt = "Panning wide shot of a calico kitten sleeping in the sunshine";

// Step 1: Generate an image with Nano Banana.
const imageResponse = await ai.models.generateContent({
  model: "gemini-2.5-flash-image",
  prompt: prompt,
});

// Step 2: Generate video with Veo 3.1 using the image.
let operation = await ai.models.generateVideos({
  model: "veo-3.1-generate-preview",
  prompt: prompt,
  image: {
    imageBytes: imageResponse.generatedImages[0].image.imageBytes,
    mimeType: "image/png",
  },
});

// Poll the operation status until the video is ready.
while (!operation.done) {
  console.log("Waiting for video generation to complete...")
  await new Promise((resolve) => setTimeout(resolve, 10000));
  operation = await ai.operations.getVideosOperation({
    operation: operation,
  });
}

// Download the video.
ai.files.download({
    file: operation.response.generatedVideos[0].video,
    downloadPath: "veo3_with_image_input.mp4",
});
console.log(`Generated video saved to veo3_with_image_input.mp4`);