from flask import Flask, request, render_template
import os

app = Flask(__name__)

UPLOAD_FOLDER = 'uploads'
ALLOWED_EXTENSIONS = {'png', 'jpg', 'jpeg', 'gif'}
app.config['UPLOAD_FOLDER'] = UPLOAD_FOLDER

def allowed_file(filename):
    return '.' in filename and filename.rsplit('.', 1)[1].lower() in ALLOWED_EXTENSIONS

@app.route('/', methods=['GET', 'POST'])
def upload_file():
    if request.method == 'POST':
        if 'file' not in request.files:
            return render_template('index.html', error='No file part')
        
        file = request.files['file']
        if file.filename == '':
            return render_template('index.html', error='No selected file')
        
        if file and allowed_file(file.filename):
            filename = file.filename
            filepath = os.path.join(app.config['UPLOAD_FOLDER'], filename)
            file.save(filepath)
            
            # Add code to identify bears in the uploaded image
            
            return render_template('index.html', filename=filename)
        
    return render_template('index.html')

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