import os
from flask import Flask, render_template, request, send_from_directory
from werkzeug.utils import secure_filename
from paddleocr import PaddleOCR

app = Flask(__name__)

# Configuration
UPLOAD_FOLDER = 'uploads'
app.config['UPLOAD_FOLDER'] = UPLOAD_FOLDER
os.makedirs(UPLOAD_FOLDER, exist_ok=True)

ALLOWED_EXTENSIONS = {'png', 'jpg', 'jpeg', 'gif'}
def allowed_file(filename):
    return '.' in filename and filename.rsplit('.', 1)[1].lower() in ALLOWED_EXTENSIONS

# Initialize OCR model
ocr = PaddleOCR(use_angle_cls=True, lang='en')

@app.route('/', methods=['GET', 'POST'])
def index():
    filename = None
    extracted_text = None

    if request.method == 'POST':
        file = request.files.get('image')
        if not file or file.filename == '' or not allowed_file(file.filename):
            return render_template('index.html', error="Please upload a valid image file (png/jpg/jpeg/gif).")

        # Save the uploaded file
        filename = secure_filename(file.filename)
        filepath = os.path.join(app.config['UPLOAD_FOLDER'], filename)
        file.save(filepath)

        # Run OCR
        result = ocr.ocr(filepath, cls=True)
        # Flatten if nested
        if isinstance(result, list) and len(result) == 1 and isinstance(result[0], list):
            result = result[0]
        lines = [line[1][0] for line in result]
        extracted_text = "\n".join(lines) if lines else "No text detected."

    return render_template('index.html', filename=filename, extracted_text=extracted_text)

@app.route('/uploads/<filename>')
def uploaded_file(filename):
    return send_from_directory(app.config['UPLOAD_FOLDER'], filename)

if __name__ == '__main__':
    port = int(os.environ.get('PORT', 5000))
    app.run(host='0.0.0.0', port=port)