import cv2
import numpy as np
import matplotlib.pyplot as plt
from PIL import Image
from scipy.spatial.distance import cosine
import gradio as gr
from tensorflow.keras.models import Model
from tensorflow.keras.models import load_model
from tensorflow.saved_model import load
import pathlib
from fastai.vision.all import *
from fastai.imports import *
from tensorflow.keras.models import model_from_json
from mtcnn.mtcnn import MTCNN

json_file = open('model.json', 'r')
loaded_model_json = json_file.read()
json_file.close()
model = model_from_json(loaded_model_json)
model.load_weights('model.h5')

plt = platform.system()
if plt == 'Linux':
    pathlib.WindowsPath = pathlib.PosixPath

def img_to_encoding(image_path, model):
    img = Image.open(image_path)
    if img is not None:
        img = np.array(img)
        img = cv2.resize(img, (224, 224), interpolation=cv2.INTER_AREA)
        x = np.expand_dims(img, axis=0)
        embedding = model.predict(x)[0, :]
        print(embedding)
        return embedding


database = {}
database["dr adnan"] = img_to_encoding(
    "86055fdb-7441-422e-b501-ffac2221dae0.jpg", model)
database["wasay"] = img_to_encoding("Wasay (1).jpg", model)
database["fatima"] = img_to_encoding("IMG_20220826_095746.jpg", model)
database["omer"] = img_to_encoding("Omer_1.jpg", model)
database["saad"] = img_to_encoding("IMG20220825113812.jpg", model)
database["waleed"] = img_to_encoding("IMG_20220825_113352.jpg", model)
database["talha"] = img_to_encoding("IMG20220825113526.jpg", model)
database["asfand"] = img_to_encoding("imgAsfand.jpg", model)
database["afrasiyab"] = img_to_encoding("imgAfra.jpg", model)


def who_is_it(image):
    # START CODE HERE

    # Step 1: Compute the target "encoding" for the image. Use img_to_encoding() see example above. ## (≈ 1 line)
    if image is not None:
        img = cv2.resize(image, (224, 224), interpolation=cv2.INTER_AREA)
        x = np.expand_dims(img, axis=0)
        encoding = model.predict(x)[0, :]
        ## Step 2: Find the closest encoding ##

        # Initialize "min_dist" to a large value, say 100 (≈1 line)
        min_dist = 10000000
        identity = "Not in the database"
        # Loop over the database dictionary's names and encodings.
        for (name, db_enc) in database.items():
            # Compute L2 distance between the target "encoding" and the current db_enc from the database. (≈ 1 line)
            dist = cosine(db_enc, encoding)
            print(dist)
            # If this distance is less than the min_dist, then set min_dist to dist, and identity to name. (≈ 3 lines)
            if dist < min_dist:
                min_dist = dist
                identity = name
        # END CODE HERE
    if min_dist < 0.4:
        return min_dist, identity
    else:
        return min_dist, ("Not in database")
        
def remove(Id):
    del database[Id]
    return Id + " removed successfully"
def add_new(newImg,newId):
    if ((newImg is not None) and (newId is not None)):
        faceModel = MTCNN()
        faces=faceModel.detect_faces(newImg)
        newImg=newImg[:,:,::-1]
        for face in faces:
            x,y,w,h = face["box"]
            img=newImg[y:y+h,x:x+w]
            if img is not None:
                img = cv2.resize(img, (224, 224), interpolation=cv2.INTER_AREA)
                x = np.expand_dims(img, axis=0)
                embedding = model.predict(x)[0, :]
                database[str(newId)]=embedding
                return newId + " added successfully!"
            
        
label = gr.outputs.Label()
faceModel=MTCNN()
def recog(image):
    faces = faceModel.detect_faces(image)
    image = image[:,:,::-1]
    min_dist=1000
    for face in faces:
        x,y,w,h = face["box"]
        img = image[y:y+h, x:x+w]
        if img is not None:
            dist, identity=who_is_it(img)
            if(dist<min_dist):
                min_dist=dist
                min_identity=identity
    if(min_dist!=1000):
        if min_identity!="Not in database":
            return "Welcome to the Lab "+min_identity
        else:
            return "Sorry, we could not recognize you"
    else:
        return "No face found"
intf_del=gr.Interface(fn=remove, inputs=gr.Textbox(), outputs=label)
intf_recog = gr.Interface(fn=recog, inputs=gr.Image(type="numpy"), outputs=label)
intf_add = gr.Interface(fn=add_new, inputs=[gr.Image(type="numpy"),gr.Textbox()], outputs=label)
demo = gr.TabbedInterface([intf_recog, intf_add, intf_del], ["Recognize!", "Add New!", "Delete!"])
demo.launch(inline=False)