from fastapi import FastAPI, File, UploadFile
from fastapi.middleware.cors import CORSMiddleware
import uvicorn
import numpy as np
from io import BytesIO
from PIL import Image
import tensorflow as tf

app = FastAPI()
# Define a list of allowed origins (modify as needed)
origins = [
    "http://localhost",
    "http://localhost:3000",
]

# Add CORS middleware to allow cross-origin requests
app.add_middleware(
    CORSMiddleware,
    allow_origins=origins,
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)

MODEL = tf.keras.models.load_model("../models/1")
CLASS_NAMES = ['Benign', '[Malignant] Pre-B',
               '[Malignant] Pro-B', '[Malignant] early Pre-B']


@app.get("/ping")
async def ping():
    return "Hello, I am alive"


def read_file_as_image(data) -> np.ndarray:
    image = np.array(Image.open(BytesIO(data)))
    return image


@app.post("/predict")
async def predict(
    file: UploadFile = File(...)
):
    image = read_file_as_image(await file.read())
    image = tf.image.resize(image, (264, 264))
    img_batch = np.expand_dims(image, 0)

    predictions = MODEL.predict(img_batch)
    predicted_class = CLASS_NAMES[np.argmax(predictions[0])]
    confidence = np.max(predictions[0])
    return {
        'class': predicted_class,
        'confidence': float(confidence)
    }
if __name__ == "__main__":
    uvicorn.run(app, host='localhost', port=8000)