app.py

import streamlit as st
import re
import os
import glob

st.set_page_config(layout="wide")

def process_line(line):
    if re.search(r'\b[A-G][#b]?m?\b', line):
        line = re.sub(r'\b([A-G][#b]?m?)\b', r"<img src='\1.png' style='height:20px;'>", line)
    return line

def process_chord_sheet(chord_sheet):
    processed_lines = []
    for line in chord_sheet.split('\n'):
        processed_line = process_line(line)
        processed_lines.append(processed_line)
    return '<br>'.join(processed_lines)

def create_search_url_wikipedia(artist_song):
    base_url = "https://www.wikipedia.org/search-redirect.php?family=wikipedia&language=en&search="
    return base_url + artist_song.replace(' ', '+').replace('–', '%E2%80%93').replace('&', 'and')

def create_search_url_youtube(artist_song):
    base_url = "https://www.youtube.com/results?search_query="
    return base_url + artist_song.replace(' ', '+').replace('–', '%E2%80%93').replace('&', 'and')

def create_search_url_chords(artist_song):
    base_url = "https://www.ultimate-guitar.com/search.php?search_type=title&value="
    return base_url + artist_song.replace(' ', '+').replace('–', '%E2%80%93').replace('&', 'and')

def create_search_url_lyrics(artist_song):
    base_url = "https://www.google.com/search?q="
    return base_url + artist_song.replace(' ', '+').replace('–', '%E2%80%93').replace('&', 'and') + '+lyrics'

def songupdate():
    st.write(st.session_state.EnhancedChordSheet)

def load_song_file2(filename):
    with open(filename, "r") as file:
        chord_sheet = file.read()
        st.session_state['chord_sheet'] = chord_sheet
        processed_sheet = process_chord_sheet(chord_sheet)
        st.markdown(processed_sheet, unsafe_allow_html=True)

def load_song_file(filename):
    with open(filename, "r") as file:
        chord_sheet = file.read()
        return chord_sheet

def song_update():
    if 'selected_file' in st.session_state:
        song_name, artist_name = parse_filename(st.session_state.selected_file)
        st.session_state.song_name = song_name
        st.session_state.artist_name = artist_name

def parse_filename(filename):
    base_name = os.path.splitext(filename)[0]
    song_name, artist_name = base_name.split(' by ')
    return song_name.replace("_", " "), artist_name.replace("_", " ")

def auto_save():
    song_name = st.session_state.get('song_name', '')
    artist_name = st.session_state.get('artist_name', '')
    chord_sheet = st.session_state.get('chord_sheet', '')

    if song_name and artist_name and chord_sheet:
        filename = song_name + " by " + artist_name + ".txt"
        with open(filename, "w") as file:
            
            
            chord_sheet_text = st.session_state.get('chord_sheet', '')
            file.write(chord_sheet_text)
            
        st.session_state['char_count'] = len(chord_sheet)
        st.success(f"Auto-saved to {filename}")

def main():

    col1, col2, col3 = st.columns([2, 3, 4])

    with col1:
        st.markdown('### 🎵 ChordSheet - Music Playing & Authoring')
        with st.expander("Select Song:", expanded=True):
            all_files = [f for f in glob.glob("*.txt") if ' by ' in f]
            selected_file = st.selectbox("Choose: ", all_files, on_change=song_update, key='selected_file')

        song_name_input = st.text_input("🎵 Song:", key='song_name', on_change=auto_save)
        artist_name_input = st.text_input("🎤 Artist:", key='artist_name', on_change=auto_save)

        if 'selected_file' in st.session_state and st.session_state.selected_file:
            # Update the session state before creating the text area widget
            st.session_state['chord_sheet'] = load_song_file(st.session_state.selected_file)

        # Save functionality
        if st.button("💾 Save", key="save_song"):
            if song_name_input and artist_name_input:
                filename = song_name_input + " by " + artist_name_input + ".txt"
                with open(filename, "w") as file:
                    file.write(chord_sheet_area)
                st.success("Chord sheet saved to file: " + filename)
            else:
                st.error("Both Song Name and Artist Name are required.")

    with col2:

        st.header("🎼 Available Songs")
        for file in all_files:
            song_info = os.path.splitext(file)[0].replace("_", " ")
            icol1, icol2 = st.columns([1, 3])
            with icol1:
                #st.markdown(f"* {song_info}")

                if selected_file:
                    #st.markdown(f"**Song:** {song_info}")
                    st.markdown("**" + song_info + "**")

                    load_song_file(selected_file)
                    song_info = os.path.splitext(selected_file)[0].replace("_", " ")

            with icol2:

                if selected_file:
                    table_md = f"""
                    | Wikipedia | YouTube | Chords | Lyrics |
                    | --------- | ------- | ------ | ------ |
                    | [📚]({create_search_url_wikipedia(song_info)}) | [🎥]({create_search_url_youtube(song_info)}) | [🎸]({create_search_url_chords(song_info)}) | [🎶]({create_search_url_lyrics(song_info)}) |
                    """
                    st.markdown(table_md)

    with col3:
        chord_sheet_area = st.text_area("Chord Sheet", value=st.session_state.get('chord_sheet', ''), height=1200, key='chord_sheet', on_change=auto_save)
        char_count_msg = f"Character Count: {st.session_state.get('char_count', 0)}"
        st.write(char_count_msg)
        
        

    # Load chord sheet from selected file into the text area
    if 'selected_file' in st.session_state and st.session_state.selected_file:
        load_song_file(st.session_state.selected_file)

        
if __name__ == '__main__':
    main()