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import streamlit as st
import base64

def render_background_img(background_img_path, image_type = "jpg"):
    '''
    A function to unpack an image from root folder and set as bg.
 
    Returns
    -------
    The background.
    '''
    # set bg name
    main_bg_ext = image_type
        
    st.markdown(
         f"""
         <style>
         .stApp {{
             background: url(data:image/{main_bg_ext};base64,{base64.b64encode(open(background_img_path, "rb").read()).decode()});
             background-size: cover
         }}
         </style>
         """,
         unsafe_allow_html=True
     )

####### CSS for the CHAT UI

css = '''
<style>
.chat-message {
    padding: 1rem; border-radius: 0.5rem; margin-bottom: 0.8rem; display: flex; max-height: 40%; overflow: auto;
}
.chat-message.user {
    background-color: #2b313e
}
.chat-message.bot {
    background-color: #475063
}
.chat-message .avatar {
  width: 15%;
}
.chat-message .avatar img {
  max-width: 60px;
  max-height: 60px;
  border-radius: 50%;
  object-fit: cover;
}
.chat-message .message {
  width: 85%;
  padding: 0 1.2rem;
  color: #fff;
}
</style>
'''

bot_template = '''
<div class="chat-message bot">
    <div class="avatar">
        <img src="https://i.ibb.co/cN0nmSj/Screenshot-2023-05-28-at-02-37-21.png" style="max-height: 60px; max-width: 60px; border-radius: 50%; object-fit: cover;">
    </div>
    <div class="message">{{MSG}}</div>
</div>
'''

user_template = '''
<div class="chat-message user">
    <div class="avatar">
        <img src="https://i.ibb.co/XJBBhsD/IMG-7040.jpg" style="max-height: 60px; max-width: 60px; border-radius: 50%; object-fit: cover;">
    </div>    
    <div class="message">{{MSG}}</div>
</div>
'''