import gradio as gr
import os
import shutil
import yaml
import tempfile
import cv2
import huggingface_hub
import subprocess
import threading

def stream_output(pipe):
    for line in iter(pipe.readline, ''):
        print(line, end='')
    pipe.close()

HF_TKN = os.environ.get("GATED_HF_TOKEN")
huggingface_hub.login(token=HF_TKN)

huggingface_hub.hf_hub_download(
    repo_id='yzd-v/DWPose',
    filename='yolox_l.onnx',
    local_dir='./models/DWPose'
)

huggingface_hub.hf_hub_download(
    repo_id='yzd-v/DWPose',
    filename='dw-ll_ucoco_384.onnx',
    local_dir='./models/DWPose'
)

huggingface_hub.hf_hub_download(
    repo_id='ixaac/MimicMotion',
    filename='MimicMotion_1.pth',
    local_dir='./models'
)

def print_directory_contents(path):
    for root, dirs, files in os.walk(path):
        level = root.replace(path, '').count(os.sep)
        indent = ' ' * 4 * (level)
        print(f"{indent}{os.path.basename(root)}/")
        subindent = ' ' * 4 * (level + 1)
        for f in files:
            print(f"{subindent}{f}")

def check_outputs_folder(folder_path):
    # Check if the folder exists
    if os.path.exists(folder_path) and os.path.isdir(folder_path):
        # Delete all contents inside the folder
        for filename in os.listdir(folder_path):
            file_path = os.path.join(folder_path, filename)
            try:
                if os.path.isfile(file_path) or os.path.islink(file_path):
                    os.unlink(file_path)  # Remove file or link
                elif os.path.isdir(file_path):
                    shutil.rmtree(file_path)  # Remove directory
            except Exception as e:
                print(f'Failed to delete {file_path}. Reason: {e}')
    else:
        print(f'The folder {folder_path} does not exist.')

def check_for_mp4_in_outputs():
    # Define the path to the outputs folder
    outputs_folder = './outputs'
    
    # Check if the outputs folder exists
    if not os.path.exists(outputs_folder):
        return None
    
    # Check if there is a .mp4 file in the outputs folder
    mp4_files = [f for f in os.listdir(outputs_folder) if f.endswith('.mp4')]
    
    # Return the path to the mp4 file if it exists
    if mp4_files:
        return os.path.join(outputs_folder, mp4_files[0])
    else:
        return None

def get_video_fps(video_path):
    # Open the video file
    video_capture = cv2.VideoCapture(video_path)
    
    if not video_capture.isOpened():
        raise ValueError("Error opening video file")

    # Get the FPS value
    fps = video_capture.get(cv2.CAP_PROP_FPS)
    
    # Release the video capture object
    video_capture.release()
    
    return fps

def load_examples(ref_image_in, ref_video_in):
    return "./examples/mimicmotion_result1_example.mp4"
    
def infer(ref_image_in, ref_video_in):
    # check if 'outputs' dir exists and empty it if necessary
    check_outputs_folder('./outputs')
    
    # Create a temporary directory
    with tempfile.TemporaryDirectory() as temp_dir:
        print("Temporary directory created:", temp_dir)
    
        # Define the values for the variables
        ref_video_path = ref_video_in
        ref_image_path = ref_image_in
        num_frames = 16
        resolution = 576
        frames_overlap = 6
        num_inference_steps = 25
        noise_aug_strength = 0
        guidance_scale = 2.0
        sample_stride = 2
        fps = 16
        seed = 42
    
        # Create the data structure
        data = {
            'base_model_path': 'stabilityai/stable-video-diffusion-img2vid-xt-1-1',
            'ckpt_path': 'models/MimicMotion_1.pth',
            'test_case': [
                {
                    'ref_video_path': ref_video_path,
                    'ref_image_path': ref_image_path,
                    'num_frames': num_frames,
                    'resolution': resolution,
                    'frames_overlap': frames_overlap,
                    'num_inference_steps': num_inference_steps,
                    'noise_aug_strength': noise_aug_strength,
                    'guidance_scale': guidance_scale,
                    'sample_stride': sample_stride,
                    'fps': fps,
                    'seed': seed
                }
            ]
        }
    
        # Define the file path
        file_path = os.path.join(temp_dir, 'config.yaml')
    
        # Write the data to a YAML file
        with open(file_path, 'w') as file:
            yaml.dump(data, file, default_flow_style=False)
    
        print("YAML file 'config.yaml' created successfully in", file_path)

        # Execute the inference command
        command = ['python', 'inference.py', '--inference_config', file_path]
        process = subprocess.Popen(command, stdout=subprocess.PIPE, stderr=subprocess.PIPE, text=True, bufsize=1)
    
        # Create threads to handle stdout and stderr
        stdout_thread = threading.Thread(target=stream_output, args=(process.stdout,))
        stderr_thread = threading.Thread(target=stream_output, args=(process.stderr,))

    
        # Start the threads
        stdout_thread.start()
        stderr_thread.start()
    
        # Wait for the process to complete and the threads to finish
        process.wait()
        stdout_thread.join()
        stderr_thread.join()
    
        print("Inference script finished with return code:", process.returncode)
        
        # Print the outputs directory contents
        print_directory_contents('./outputs')

    # Call the function and print the result
    mp4_file_path = check_for_mp4_in_outputs()
    print(mp4_file_path)
    
    return mp4_file_path

output_video = gr.Video()

with gr.Blocks() as demo:
    with gr.Column():
        with gr.Row():
            with gr.Column():
                with gr.Row():
                    ref_image_in = gr.Image(type="filepath")
                    ref_video_in = gr.Video()
                submit_btn = gr.Button("Submit")
                gr.Examples(
                    examples = [
                        ["./examples/demo1.jpg", "./examples/preview_1.mp4"]
                    ],
                    fn = load_examples,
                    inputs = [ref_image_in, ref_video_in],
                    outputs = [output_video],
                    run_on_click = True,
                    cache_examples = False
                )
            output_video.render()
    submit_btn.click(
        fn = infer,
        inputs = [ref_image_in, ref_video_in],
        outputs = [output_video]
    )

demo.launch(show_api=False, show_error=False)