# import the necessary packages
import os
import sys
import requests
import ssl
from flask import Flask
from flask import request
from flask import jsonify
from flask import send_file


from app_utils import download
from app_utils import generate_random_filename
from app_utils import clean_me
from app_utils import clean_all
from app_utils import create_directory
from app_utils import get_model_bin
from app_utils import convertToJPG

from os import path
import torch

import fastai
from fasterai.visualize import *
from pathlib import Path
import traceback


torch.backends.cudnn.benchmark=True


os.environ['CUDA_VISIBLE_DEVICES']='0'

app = Flask(__name__)



# define a predict function as an endpoint
@app.route("/process", methods=["POST"])
def process_video():

    input_path = generate_random_filename(upload_directory,"mp4")
    output_path = os.path.join(results_video_directory, os.path.basename(input_path))

    try:
        url = request.json["source_url"]
        render_factor = int(request.json["render_factor"])

        video_path = video_colorizer.colorize_from_url(source_url=url, file_name=input_path, render_factor=render_factor)
        callback = send_file(output_path, mimetype='application/octet-stream')

        return callback, 200

    except:
        traceback.print_exc()
        return {'message': 'input error'}, 400

    finally:
        clean_all([
            input_path,
            output_path
            ])

if __name__ == '__main__':
    global upload_directory
    global results_video_directory
    global video_colorizer

    upload_directory = '/data/upload/'
    create_directory(upload_directory)

    results_video_directory = '/data/video/result/'
    create_directory(results_video_directory)

    model_directory = '/data/models/'
    create_directory(model_directory)
    
    video_model_url = 'https://www.dropbox.com/s/336vn9y4qwyg9yz/ColorizeVideo_gen.pth?dl=0'
    get_model_bin(video_model_url, os.path.join(model_directory, 'ColorizeVideo_gen.pth'))

    video_colorizer = get_video_colorizer()
    
    port = 5000
    host = '0.0.0.0'

    app.run(host=host, port=port, threaded=False)