import os
import gradio as gr
import cv2
import torch
import urllib.request
import numpy as np
import matplotlib.pyplot as plt
from PIL import Image
import subprocess

def calculate_depth(model_type, gan_type, dim, slider, img):

    
    if not os.path.exists('temp'):
      os.system('mkdir temp')

    filename = "Images/Input-Test/1.png"

    img.save(filename, "PNG")

    midas = torch.hub.load("intel-isl/MiDaS", model_type)
    
    device = torch.device("cuda") if torch.cuda.is_available() else torch.device("cpu")
    midas.to(device)
    midas.eval()

    midas_transforms = torch.hub.load("intel-isl/MiDaS", "transforms")

    if model_type == "DPT_Large" or model_type == "DPT_Hybrid":
        transform = midas_transforms.dpt_transform
    else:
        transform = midas_transforms.small_transform

    img = cv2.imread(filename)
    img = cv2.cvtColor(img, cv2.COLOR_BGR2RGB)

    input_batch = transform(img).to(device)

    with torch.no_grad():
        prediction = midas(input_batch)

        prediction = torch.nn.functional.interpolate(
            prediction.unsqueeze(1),
            size=img.shape[:2],
            mode="bicubic",
            align_corners=False,
        ).squeeze()

    output = prediction.cpu().numpy()

    formatted = (output * 255.0 / np.max(output)).astype('uint8')
    out_im = Image.fromarray(formatted)
    out_im.save("Images/Input-Test/1_d.png", "PNG")
    

    c_images = '1'
    name_output = 'out'

    dict_saved_gans = {'Cycle': '74962_110', 'Cycle(half)': '66942','noCycle': '31219_110', 'noCycle-noCr': '92332_110', 'noCycle-noCr-noL1': '82122_110', 'OnlyGen': '70944_110' }

    subprocess.run(["python", "main.py", "--gan_type", 'WiggleGAN', "--expandGen", "4", "--expandDis", "4", "--batch_size", c_images, "--cIm", c_images,
                    "--visdom", "false", "--wiggleDepth", str(slider), "--seedLoad", dict_saved_gans[gan_type], "--gpu_mode", "false", "--imageDim", dim, "--name_wiggle", name_output
                    ])
    subprocess.run(["python",  "WiggleResults/split.py", "--dim", dim])

    path_video = os.path.join(os.path.dirname(__file__), 'WiggleResults' , name_output + '_0.mp4')
    print(path_video)

    return [img,f'WiggleResults/' + name_output + '_0.gif', path_video, f'WiggleResults/'+ name_output + '.jpg']


with gr.Blocks() as demo:
    gr.Markdown("Start typing below and then click **Run** to see the output.")
    
    ## Depth Estimation
    midas_models = ["DPT_Large","DPT_Hybrid","MiDaS_small"]
    gan_models = ["Cycle","Cycle(half)","noCycle","noCycle-noCr","noCycle-noCr-noL1","OnlyGen"]
    dim = ['256','512','1024']

    with gr.Row():
        inp = [gr.inputs.Dropdown(midas_models, default="MiDaS_small", label="Depth estimation model type")]
        inp.append(gr.inputs.Dropdown(gan_models, default="Cycle", label="Different GAN trainings"))
        inp.append(gr.inputs.Dropdown(dim, default="256", label="Wiggle dimension result"))
    inp.append(gr.Slider(1,15, default = 2, label='StepCycles',step= 1))
    with gr.Row():
        inp.append(gr.Image(type="pil", label="Input"))
        out = [gr.Image(type="pil", label="depth_estimation")]
    with gr.Row():      
        out.append(gr.Image(type="file", label="Output_wiggle_gif"))
        out.append(gr.Video(label="Output_wiggle_video"))
    out.append(gr.Image(type="file", label="Output_images"))
    btn = gr.Button("Calculate depth + Wiggle")
    btn.click(fn=calculate_depth, inputs=inp, outputs=out)


demo.launch()