import gradio as gr
import pandas as pd
import random
import os
import torch
import torch.nn.functional as F
from mobilenet import MobileNetLarge3D
from torchvision.io import read_video
import time

def classify_pitch(confidence_scores):
    if torch.argmax(confidence_scores) == 0:
        call = 'Ball'
    elif torch.argmax(confidence_scores) == 1:
        call = 'Strike'
    else:
        print("that's odd, something is wrong")
        pass
    return call

def get_demo_call(video_name):
    video_name = os.path.basename(video_name).lower()
    if video_name.startswith("strike"):
        ump_out = "Strike"
    elif video_name.startswith("ball"):
        ump_out = "Ball"
    else:
        ump_out = "Error"
    return ump_out

def call_pitch(pitch):
    std = (0.2104, 0.1986, 0.1829)
    mean = (0.3939, 0.3817, 0.3314)
    # Convert the mean and std to tensors
    mean = torch.tensor(mean).view(1, 3, 1, 1, 1)
    std = torch.tensor(std).view(1, 3, 1, 1, 1)
    ump_out = get_demo_call(pitch)
    pitch_tensor = (read_video(pitch,pts_unit='sec')[0].permute(-1,0,1,2)).unsqueeze(0)/255
    pitch_tensor = (pitch_tensor-mean)/std #normalize the pitch tensor
    video_length = pitch_tensor.shape[2]/15
    model = MobileNetLarge3D()
    model.load_state_dict(torch.load('weights/MobileNetLarge.pth',map_location=torch.device('cpu')))
    model.eval()

    #run the model
    with torch.no_grad():
        output = model(pitch_tensor)
    output = F.softmax(output,dim=1)
    final_call = classify_pitch(output)
    time.sleep(video_length-1.5) #wait until the video is done to return the call

    return final_call,ump_out

def generate_random_pitch():
    random_number = random.randint(1,2645342) #random number in our range to select a random pitch

    df = pd.read_csv('picklebot_2m.csv',skiprows=random_number,nrows=1,header=None) #just load one row
    video_link = df.values[0][0]
    label = df.values[0][1]
    
    if label == 0:
        ump_out = "Ball"
    elif label == 1:
        ump_out = "Strike"
    else:
        #error if it's not a 0 or 1
        ump_out = "Error"
    
    random_pitch = download_pitch(video_link,ump_out)

    return random_pitch
def download_pitch(video_link,ump_out):
    #download and process the video link using yt-dlp and ffmpeg
    os.system(f"yt-dlp -q --no-warnings --force-overwrites -f mp4 {video_link} -o 'demo_files/downloaded_videos/{ump_out}_demo_video.mp4'")
    os.system(f'ffmpeg -y -nostats -loglevel 0 -i demo_files/downloaded_videos/{ump_out}_demo_video.mp4 -vf "crop=700:700:in_w/2-350:in_h/2-350,scale=224:224" -r 15 -c:v libx264 -crf 23 -c:a aac -strict experimental demo_files/downloaded_videos/{ump_out}_cropped_video.mp4')
    return f"demo_files/downloaded_videos/{ump_out}_cropped_video.mp4"


demo_files = os.listdir("demo_files/")
demo_files = [os.path.join("demo_files/", file) for file in demo_files if file.endswith(".mp4")]
with gr.Blocks(title="Picklebot") as demo:
    with gr.Row():
        with gr.Column(scale=3):    
            inp = gr.Video(interactive=False, label="Pitch Video")
        with gr.Column(scale=2):
            ump_out = gr.Label(label="Umpire's Original Call")
            pb_out = gr.Label(label="Picklebot's Call")
            random_button = gr.Button("🔀 Load a Random Pitch")
            ball = 0
            random_button.click(fn=generate_random_pitch,outputs=[inp])
            inp.play(fn=call_pitch,inputs=inp,outputs=[pb_out,ump_out])
            gr.ClearButton([inp,pb_out,ump_out])
            gr.Examples(demo_files,inputs=inp,outputs=[inp])

if __name__ == "__main__":
  demo.launch()