# Import necessary libraries
import matplotlib

# Use Agg backend for Matplotlib
matplotlib.use("Agg")

# Libraries for the app
import streamlit as st
import time
import io
import argparse
import sys
import os.path
import subprocess
import tempfile
import logging
import torch

# Visualization libraries
import altair as alt
import av

# Machine Learning and Image Processing libraries
import numpy as np
import pandas as pd
import cv2 as cv
from PIL import Image, ImageOps
from tqdm import tqdm

# Custom modules
import inference
from app_utils import *
from app_plot_utils import *

@st.cache_data
def load_video(video_url):
    video_bytes = open(video_url, "rb").read()
    return video_bytes

@st.cache_data
def load_historical(fpath):
    return pd.read_csv(fpath)




# Define the main function to run the Streamlit app
def run_app():
    # Set Streamlit options
    st.set_page_config(layout="wide")
    st.set_option("deprecation.showfileUploaderEncoding", False)
    
    # App title and description
    st.title("MIT Count Fish Counter")
    st.text("Upload a video file to detect and count fish")
    
    # Example video URL or file path (replace with actual video URL or file path)
    video_url = "yolo2_out_py.mp4"
    video_bytes = load_video(video_url)

    # Load historical herring
    df_historical_herring = load_historical(fpath="herring_count_all.csv")

    # Check if GPU is available
    gpu_available = torch.cuda.is_available()
    mps_available = torch.backends.mps.is_available()

    main_tab, upload_tab = st.tabs(["Analysis", "Upload video for analysis"])

    with main_tab:

        # Create two columns for layout
        col1, col2 = st.columns(2)
        ## Col1 #########################################
        with col1:
            ## Initial visualizations
            # Plot historical data
            st.altair_chart(
                plot_historical_data(df_historical_herring),
                use_container_width=True,
            )
            st.subheader("Yearly Totals (from manual counts)")
            st.dataframe(df_historical_herring.groupby(df_historical_herring["Date"].dt.year).sum().T)
            # Display map of fishery locations
            st.subheader("Map of Fishery Locations")
            st.map(
                pd.DataFrame(
                    np.random.randn(5, 2) / [50, 50] + [42.41, -71.38],
                    columns=["lat", "lon"],
                ),use_container_width=True)

        with col2:
            st.subheader("Example of processed video")
            st.video(video_bytes)

        # Display GPU/CPU information
        st.subheader("System Information")
        if gpu_available:
            st.info("GPU is available.")
        elif mps_available:
            st.info("MPS is available.")    
        else:
            st.info("Only CPU is available.")

    with upload_tab:
        process_uploaded_file()

# Run the app if the script is executed directly
if __name__ == "__main__":
    run_app()