from flask import Flask, jsonify, request

app = Flask(__name__)

# хранение данных сущности B
entity_b_data = []


@app.route('/entity_b', methods=['GET'])
def get_entity_b():
    return jsonify(entity_b_data)


@app.route('/entity_b', methods=['POST'])
def create_entity_b():
    new_entity = request.json
    entity_b_data.append(new_entity)
    return jsonify(new_entity), 201


@app.route('/entity_b/<int:id>', methods=['PUT'])
def update_entity_b(id):
    for entity in entity_b_data:
        if entity['id'] == id:
            entity.update(request.json)
            return jsonify(entity), 200
    return jsonify({'error': 'Entity not found'}), 404


@app.route('/entity_b/<int:id>', methods=['DELETE'])
def delete_entity_b(id):
    global entity_b_data
    entity_b_data = [entity for entity in entity_b_data if entity['id'] != id]
    return jsonify({'message': 'Entity deleted'}), 200


if __name__ == '__main__':
    app.run(host='0.0.0.0', port=5001)