app.py

from fastapi import FastAPI, Request
from fastapi.responses import JSONResponse
import base64
import io
from PIL import Image
import traceback  # ←これを追加

app = FastAPI()

@app.get("/")
def root():
    return {"status": "ok"}

@app.post("/generate")
async def generate_image(request: Request):
    try:
        body = await request.json()
        base64_image = body.get("image")
        prompt = body.get("prompt", "")

        if not base64_image:
            return JSONResponse(status_code=400, content={"success": False, "error": "image is required"})

        # 画像デコードと変換
        image_data = base64.b64decode(base64_image.split(",")[-1])
        image = Image.open(io.BytesIO(image_data)).convert("RGB")

        buffered = io.BytesIO()
        image.save(buffered, format="PNG")
        encoded_img = base64.b64encode(buffered.getvalue()).decode("utf-8")

        return JSONResponse(content={
            "success": True,
            "echo_prompt": prompt,
            "image_base64": f"data:image/png;base64,{encoded_img}"
        })

    except Exception as e:
        print("=== ERROR OCCURRED ===")
        traceback.print_exc()
        print("======================")
        return JSONResponse(status_code=500, content={"success": False, "error": str(e)})