from flask import Flask, request, jsonify
import os
from werkzeug.utils import secure_filename

app = Flask(__name__)

# Configuration
UPLOAD_FOLDER = 'uploads'
ALLOWED_EXTENSIONS = {'mp4', 'mov', 'avi'}
app.config['UPLOAD_FOLDER'] = UPLOAD_FOLDER

# Data storage (for demo purposes, use a database like PostgreSQL in production)
videos = []
likes = {}

# Ensure upload folder exists
if not os.path.exists(UPLOAD_FOLDER):
    os.makedirs(UPLOAD_FOLDER)

# Helper to check allowed file extensions
def allowed_file(filename):
    return '.' in filename and filename.rsplit('.', 1)[1].lower() in ALLOWED_EXTENSIONS

# Upload a video
@app.route('/upload', methods=['POST'])
def upload_video():
    if 'video' not in request.files:
        return jsonify({'error': 'No video file provided'}), 400
    
    file = request.files['video']
    if file and allowed_file(file.filename):
        filename = secure_filename(file.filename)
        file_path = os.path.join(app.config['UPLOAD_FOLDER'], filename)
        file.save(file_path)
        
        # Save video metadata
        video_id = len(videos) + 1
        videos.append({'id': video_id, 'filename': filename, 'likes': 0})
        likes[video_id] = 0
        
        return jsonify({'message': 'Video uploaded successfully', 'video_id': video_id}), 201
    else:
        return jsonify({'error': 'Invalid file format'}), 400

# Retrieve all videos
@app.route('/videos', methods=['GET'])
def get_videos():
    return jsonify(videos)

# Like a video
@app.route('/like/<int:video_id>', methods=['POST'])
def like_video(video_id):
    for video in videos:
        if video['id'] == video_id:
            video['likes'] += 1
            likes[video_id] += 1
            return jsonify({'message': 'Video liked successfully', 'total_likes': video['likes']}), 200
    return jsonify({'error': 'Video not found'}), 404

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