from fastai.vision.all import *
import gradio as gr
import torchvision.transforms as transforms
import torch

def transform_image(image):
    my_transforms = transforms.Compose([transforms.ToTensor(),
                                        transforms.Normalize(
                                            [0.485, 0.456, 0.406],
                                            [0.229, 0.224, 0.225])])
    image_aux = image
    return my_transforms(image_aux).unsqueeze(0).to(device)

# Definimos una función que se encarga de llevar a cabo las predicciones
def predict(img):
    device = torch.device("cuda" if torch.cuda.is_available() else "cpu") 
    model = torch.jit.load("model.pth")
    model = model.cpu()
    model.eval()
    
    image = transforms.Resize((480,640))(img)
    tensor = transform_image(image=image)
    
    model.to(device)
    with torch.no_grad():
        outputs = model(tensor)
        
    mask = np.array(outputs.cpu())
    mask[mask == 1] = 255 # grape
    mask[mask == 2] = 150 # leaves
    mask[mask == 3] = 76 # pole
    mask[mask == 4] = 29 # wood
    
    mask=np.reshape(mask,(480,640))
    
    return Image.fromarray(mask.astype('uint8'))
    
# Creamos la interfaz y la lanzamos. 
gr.Interface(fn=predict, inputs=gr.inputs.Image(shape=(128, 128)), outputs=gr.outputs.Image(),examples=['color_154.jpg','color_155.jpg']).launch(share=False)