import os
import pandas as pd
import streamlit as st
from io import StringIO
import sys

# Define a persistent file path for the dataset
DATA_FILE_PATH = "dataset.csv"

# Page Title
st.markdown("<h1 style='text-align:center; color:#FFD700;'>Hotel Data Set</h1>", unsafe_allow_html=True)
# CSS styles
st.markdown(
    """
    <style>
    body {
        background-color: black; /* Set background color to black */
    }
    .header {
        color: #FFD700; /* Gold for the header */
        font-size: 48px; /* Larger font size for the header */
        font-weight: bold;
        text-align: center; /* Center-align the header */
    }
    .subheader {
        color: #D3D3D3; /* Light Gray for the subheader */
        font-size: 32px; /* Slightly smaller font size for the subheader */
        font-weight: normal;
        text-align: center; /* Center-align the subheader */
    }
    </style>
    """,
    unsafe_allow_html=True,
)


# Function to load the dataset
def load_dataset():
    if os.path.exists(DATA_FILE_PATH):
        return pd.read_csv(DATA_FILE_PATH)
    else:
        return None

# Check if dataset is in session state or load it from disk
if "dataset" not in st.session_state:
    st.session_state["dataset"] = load_dataset()

# File uploader widget to upload a new dataset
uploaded_file = st.file_uploader("Choose a CSV file", type=["csv"])

if uploaded_file is not None:
    # Read the uploaded CSV file into a pandas DataFrame
    df = pd.read_csv(uploaded_file)

    # Save the dataset permanently to disk
    df.to_csv(DATA_FILE_PATH, index=False)

    # Store in session state
    st.session_state["dataset"] = df

    # Display success message
    st.success(f"Dataset uploaded and saved permanently as {DATA_FILE_PATH}!")

# Access the dataset from session state
df = st.session_state.get("dataset")

if df is not None:
    st.subheader("Dataset Preview:")
    st.write(df)  # Display the first 5 rows
    # Redirect the output of df.info() to a string buffer
    buffer = StringIO()
    df.info(buf=buffer)

    # Display the content in Streamlit as Markdown
    st.subheader("Info of the Dataset:")
    st.markdown(f"```{buffer.getvalue()}```")

    st.subheader("Dataset Shape (Rows, Columns):")
    st.write(df.shape)
else:
    st.info("No dataset found. Please upload a CSV file.")
# Define the URL of the background image (use your own image URL)
background_image_url = "https://cdn-uploads.huggingface.co/production/uploads/675fab3a2d0851e23d23cad3/vulm4WwHmmA14tsVXYaTM.jpeg"
# Apply custom CSS for the background image and overlay
st.markdown(
    f"""
    <style>
        .stApp {{
            background-image: url("{background_image_url}");
            background-size: auto;
            background-position: repeat;
            height: 100vh;
        }}
        
        /* Semi-transparent overlay */
        .stApp::before {{
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.4);  /* Adjust transparency here (0.4 for 40% transparency) */
            z-index: -1;
        }}

         /* Styling the content to ensure text visibility */
        .stMarkdown {{
            color: white;  /* White text to ensure visibility */
            font-size: 30px;  /* Adjust font size for better readability */
        }}
    </style>
    """, 
    unsafe_allow_html=True
)
st.markdown(
    """
    <style>
    .custom-button {
        display: inline-block;
        padding: 5px 10px;
        font-size: 14px;
        color: #ffffff;
        background-color: #4CAF50;
        border: none;
        border-radius: 5px;
        text-align: center;
        text-decoration: none;
        transition: background-color 0.3s ease, transform 0.2s ease;
        cursor: pointer;
    }
    .custom-button:hover {
        background-color: #45a049;
        transform: scale(1.05);
    }
    .button-container {
        display: flex;
        justify-content: space-between;
        margin-top: 20px;
    }
    </style>
    """,
    unsafe_allow_html=True,
)


# Navigation Buttons
st.markdown(
    """
    <div class="button-container">
        <a href="/0_Problem_Statement" target="_self" class="custom-button">Previous ⏮️</a>
        <a href="/2_Data_Cleaning_and_Processing" target="_self" class="custom-button">Next ⏭️</a>
    </div>
    """,
    unsafe_allow_html=True,
)