import gradio as gr
from gradio_client import Client

splt_client = Client("https://fffiloni-splittrack2musicgen.hf.space/")
#whisper_client = Client("https://sanchit-gandhi-whisper-jax.hf.space/")
whisper_client = Client("https://sanchit-gandhi-whisper-large-v2.hf.space/")

import re

def format_lyrics(text):
    # Use regex to find parts that start with a capital letter and insert a newline
    formatted_text = re.sub(r'(?<!^)([A-Z])', r'\n\1', text)

    # Remove any leading whitespace on each line
    formatted_text = re.sub(r'^[ \t]+', '', formatted_text, flags=re.MULTILINE)

    return formatted_text

    
def infer(audio_input):

    # STEP 1 | Split vocals from the song/audio file
    splt_result = splt_client.predict(
    				audio_input,	# str (filepath or URL to file) in 'Input' Audio component
    				"vocals",	# str  in 'Track' Radio component
    				api_name="/splt_trck"
    )
    print(splt_result)

    # STEP 2 | Transcribe 
    # TO-DO : handling errors if JAX demo queue is full
    whisper_result = whisper_client.predict(
    				splt_result,	# str (filepath or URL to file) in 'inputs' Audio component
    				"transcribe",	# str  in 'Task' Radio component
    				#True,	# bool  in 'Return timestamps' Checkbox component
    				api_name="/predict"
    )
    print(whisper_result)

    #return whisper_result[0] # if using JAX

    lyrics = format_lyrics(whisper_result)

    print(lyrics)

    return splt_result, lyrics

css = """
#col-container {max-width: 510px; margin-left: auto; margin-right: auto;}
"""

with gr.Blocks(css=css) as demo:
    with gr.Column(elem_id="col-container"):
        gr.HTML("""<div style="text-align: center; max-width: 700px; margin: 0 auto;">
                <div
                style="
                    display: inline-flex;
                    align-items: center;
                    gap: 0.8rem;
                    font-size: 1.75rem;
                "
                >
                <h1 style="font-weight: 900; margin-bottom: 7px; margin-top: 5px;">
                    Song To Lyrics
                </h1>
                </div>
                <p style="margin-bottom: 10px; font-size: 94%">
                Send the audio file of your favorite song, and get the lyrics ! <br />
                Under the hood, we split and get the vocals track from the audio file, then send the vocals to Whisper.
                </p>
            </div>""")
        song_in = gr.Audio(label="Song input", type="filepath", source="upload")
        getlyrics_btn = gr.Button("Get Lyrics !")
        vocals_out = gr.Audio(label="Vocals Only")
        lyrics_res = gr.Textbox(label="Lyrics")

    getlyrics_btn.click(fn=infer, inputs=[song_in], outputs=[vocals_out, lyrics_res])

demo.queue().launch()