"""
Utility functions for the Instagram Caption Generator app.
"""
import streamlit as st
from dotenv import load_dotenv
from transformers import AutoProcessor, Blip2ForConditionalGeneration
import os
from pathlib import Path
import pandas as pd


def get_gemini_api_key():
    """
    Retrieves the Google API key for accessing the Generative AI API.
    :return: str - The Google API key.
    """
    load_dotenv()
    google_api_key = os.getenv("GOOGLE_API_KEY")
    return google_api_key


@st.cache_resource()
def init_model(init_model_required):
    """
    Initializes the BLIP-2 model and processor for image captioning.
    This helper function allows for lazy loading of the model and processor.
    The streamlit app can call this function to load the model and processor
    only when needed.
    :param init_model_required: bo
    ol - Flag to indicate if the model needs to be initialized.
    :returns: AutoProcessor, Blip2ForConditionalGeneration, bool - Model processor, BLIP-2 model, and flag.
    """
    if init_model_required:
        try:
            processor = AutoProcessor.from_pretrained("Salesforce/blip2-opt-2.7b")
            blip2_model = Blip2ForConditionalGeneration.from_pretrained("Salesforce/blip2-opt-2.7b")
            init_model_required = False
            return processor, blip2_model, init_model_required
        except Exception as e:
            st.error(f"Error occurred during model initialization: {e}")


# Function to store the user data to a CSV file
def save_user_data(first_name, last_name, email, phone):
    """
    Function to store the user data to a CSV file

    :param first_name: str - First name of the user
    :param last_name: str - Last name of the user
    :param email: str - Email of the user
    :param phone: str - Phone number of the user
    :return: None
    """
    csv_file = Path("./user_data/user_data.csv")
    # Check if the file exists and create a DataFrame accordingly
    if csv_file.exists():
        df = pd.read_csv(csv_file)
    else:
        df = pd.DataFrame(columns=["First Name", "Last Name", "Email", "Phone Number"])

    # Add and save new user data (not for production).
    new_data = pd.DataFrame({"First Name": [first_name],
                             "Last Name": [last_name],
                             "Email": [email],
                             "Phone Number": [phone]})
    df = pd.concat([df, new_data], ignore_index=True)
    df.to_csv(csv_file, index=False)
    return None


def get_gif(path):
    """Function to get the GIF image"""
    with open(path, "rb") as file:
        gif = file.read()
    return gif


# Blip-2 does most of the standard image processing needed for image captioning.
def process_image(image_data, processor):
    pass