from flask import Flask, render_template, request, send_from_directory
from spleeter.separator import Separator
import os
from werkzeug.utils import secure_filename

app = Flask(__name__)
UPLOAD_FOLDER = 'uploads'
OUTPUT_FOLDER = 'output' # Usar uma pasta de saída separada é uma boa prática
app.config['UPLOAD_FOLDER'] = UPLOAD_FOLDER
app.config['OUTPUT_FOLDER'] = OUTPUT_FOLDER

# Garante que as pastas existam
os.makedirs(UPLOAD_FOLDER, exist_ok=True)
os.makedirs(OUTPUT_FOLDER, exist_ok=True)

@app.route('/', methods=['GET', 'POST'])
def index():
    if request.method == 'POST':
        if 'audiofile' not in request.files:
            return render_template('index.html', error='Nenhum arquivo enviado.')
        file = request.files['audiofile']
        if file.filename == '':
            return render_template('index.html', error='Nenhum arquivo selecionado.')
        if file:
            filename = secure_filename(file.filename)
            filepath = os.path.join(app.config['UPLOAD_FOLDER'], filename)
            file.save(filepath)

            # Define o diretório de saída para os stems
            output_path = os.path.join(app.config['OUTPUT_FOLDER'], os.path.splitext(filename)[0])
            
            separator = Separator('spleeter:2stems')
            separator.separate_to_file(filepath, app.config['OUTPUT_FOLDER'])

            # Nome da pasta de saída para os links
            output_foldername = os.path.splitext(filename)[0]

            return render_template('index.html', 
                                   vocals_path=f'{output_foldername}/vocals.wav',
                                   accompaniment_path=f'{output_foldername}/accompaniment.wav')
    return render_template('index.html')

@app.route('/download/<path:filename>')
def download_file(filename):
    return send_from_directory(app.config['OUTPUT_FOLDER'], filename, as_attachment=True)

if __name__ == '__main__':
    app.run(debug=True)