Being towards death

# Import hashlib module for encryption hash functions.
import hashlib
# Import os module for file and directory operations.
import os

# Define function calculate_sha256 to compute the SHA-256 hash value of a file.
def calculate_sha256(file_path):
    sha256 = hashlib.sha256()  # Create a sha256 hash object
    # Open the file in binary read mode
    with open(file_path, 'rb') as file:
        # Read the file content, reading 4096 bytes at a time
        for chunk in iter(lambda: file.read(4096), b''):
            sha256.update(chunk)  # Update the state of the hash object
    return sha256.hexdigest()  # Return the hexadecimal representation of the hash value

# Define function check_integrity to verify the integrity of a file.
def check_integrity(file_path, expected_checksum):
    actual_checksum = calculate_sha256(file_path)  # Calculate the actual SHA-256 hash value of the file
    return actual_checksum == expected_checksum  # Compare the actual hash value with the expected hash value

# If this script is run directly.
if __name__ == "__main__":
    file_path = input("Enter the path to the file: ")  # Get the file path from user input
    expected_checksum = input("Enter the expected SHA-256 checksum: ")  # Get the expected SHA-256 hash value from user input
    
    # Check if the file exists
    if os.path.isfile(file_path):
        # Call check_integrity function to verify file integrity
        if check_integrity(file_path, expected_checksum):
            print("File integrity verified: The file has not been tampered with.")  # Verification successful
        else:
            print("File integrity check failed: The file may have been tampered with.")  # Verification failed
    else:
        print("Error: File not found.")  # File not found error message

# Import Streamlit library to create web applications
import streamlit as st
# Import date for handling dates
from datetime import date
# Import yfinance library to get stock data from Yahoo Finance
import yfinance as yf
# Import Prophet library for time series forecasting
from prophet import Prophet
# Import Prophet's Plotly plotting interface and Plotly graph objects
from prophet.plot import plot_plotly
from plotly import graph_objs as go

# Set the start date for prediction and the current date
START = "2015-01-01"
TODAY = date.today().strftime("%Y-%m-%d")

# Create application title using Streamlit
st.title('Stock Forecast App')

# Set a selection box for users to choose stocks
stocks = ('MSFT', "TSLA", 'GOOG', 'AAPL', "NVDA")
selected_stock = st.selectbox('Select dataset for prediction', stocks)

# Create a slider for users to select the number of years for prediction, ranging from 1 to 4 years
n_years = st.slider('Years of prediction:', 1, 4)
period = n_years * 365  # Convert years to days

# Define a caching function to load stock data, avoiding reloading on each session
@st.cache
def load_data(ticker):
    data = yf.download(ticker, START, TODAY)  # Download stock data from Yahoo Finance
    data.reset_index(inplace=True)  # Reset the DataFrame index
    return data

# Display data loading status
data_load_state = st.text('Loading data...')
data = load_data(selected_stock)  # Call function to load data
data_load_state.text('Loading data... done!')  # Update loading status

# Display the last few rows of the raw data
st.subheader('Raw data')
st.write(data.tail())

# Define function to plot the opening and closing prices of the raw data
def plot_raw_data():
    fig = go.Figure()
    fig.add_trace(go.Scatter(x=data['Date'], y=data['Open'], name="stock_open"))
    fig.add_trace(go.Scatter(x=data['Date'], y=data['Close'], name="stock_close"))
    fig.layout.update(title_text='Time Series data with Rangeslider', xaxis_rangeslider_visible=True)
    st.plotly_chart(fig)

plot_raw_data()

# Use Prophet for forecasting
df_train = data[['Date', 'Close']]
df_train = df_train.rename(columns={"Date": "ds", "Close": "y"})
m = Prophet()
m.fit(df_train)
future = m.make_future_dataframe(periods=period)
forecast = m.predict(future)

# Display and plot the forecast data
st.subheader('Forecast data')
st.write(forecast.tail())
st.write(f'Forecast plot for {n_years} years')
fig1 = plot_plotly(m, forecast)
st.plotly_chart(fig1)

# Display forecast components
st.write("Forecast components")
fig2 = m.plot_components(forecast)
st.write(fig2)