# Import required libraries
import streamlit as st
from moviepy.editor import VideoFileClip, concatenate_videoclips
import tempfile
import base64

# Streamlit app title
st.title("Video Concatenator App 🎥")

# Function to convert video file to base64
def get_video_base64(video_path):
    with open(video_path, "rb") as file:
        video_base64 = base64.b64encode(file.read()).decode()
    return video_base64

# Textbox for user to specify output video name
output_video_name = st.text_input("Enter the name for the output video:", "Output_Video.mp4")

# Upload videos
uploaded_files = st.file_uploader("Upload Video Files 📤", type=["mp4"], accept_multiple_files=True)

if uploaded_files:
    video_clips = []
    video_paths = []
    for file in uploaded_files:
        tfile = tempfile.NamedTemporaryFile(delete=False, suffix=".mp4") 
        tfile.write(file.read())
        video_paths.append(tfile.name)
        clip = VideoFileClip(tfile.name)
        video_clips.append(clip)

    st.write("Uploaded video files: 📂", video_paths)

    # Concatenate video clips
    final_video = concatenate_videoclips(video_clips)

    # Save the result
    final_video_path = tempfile.NamedTemporaryFile(delete=False, suffix=".mp4").name
    final_video.write_videofile(final_video_path, codec="libx264")

    # Provide download link for the video
    video_base64 = get_video_base64(final_video_path)
    st.markdown(f'### Download Output Video 📥')
    href = f'<a href="data:video/mp4;base64,{video_base64}" download="{output_video_name}">Click here to download the video</a>'
    st.markdown(href, unsafe_allow_html=True)