from flask import Blueprint, request, jsonify
from flask_jwt_extended import jwt_required
from flasgger.utils import swag_from
from models.service_instance import ServiceInstance
from models.service import Service
from models.user import db

service_instance_bp = Blueprint('service_instance', __name__, url_prefix='/service_instance')


@service_instance_bp.route('/', methods=['POST'])
@jwt_required()
@swag_from('../docs/service_instance/create.yml')
def create_service_instance():
    data = request.get_json()
    service_id = data.get('service_id')
    name = data.get('name')
    description = data.get('description')

    # Verifica se o serviço existe
    service = Service.query.get(service_id)
    if not service:
        return jsonify({'error': 'Serviço não encontrado'}), 404

    # Cria um novo ServiceInstance
    service_instance = ServiceInstance(
        service_id=service_id,
        name=name,
        description=description
    )

    # Adiciona e comita no banco de dados
    db.session.add(service_instance)
    db.session.commit()

    return jsonify({'message': 'Instância de serviço criada com sucesso', 'service_instance_id': service_instance.id}), 201

@service_instance_bp.route('/', methods=['GET'])
@jwt_required()
@swag_from('../docs/service_instance/get.yml')
def list_ambiente():
    page = request.args.get('page', 1, type=int)
    per_page = request.args.get('per_page', 10, type=int)

    pagination = ServiceInstance.query.paginate(page=page, per_page=per_page, error_out=False)
    service_instances = pagination.items

    return jsonify({
        'service_instance': [
            {
                'id': service_instance.id,
                'name': service_instance.name,
                'description': service_instance.description,
                'service_id': service_instance.service_id
            } for service_instance in service_instances
        ],
        'total': pagination.total,
        'page': pagination.page,
        'per_page': pagination.per_page
    }), 200

@service_instance_bp.route('/get-id-by-name/<string:nome>', methods=['GET'])
@jwt_required()
@swag_from('../docs/service_instance/get_id_by_name.yml')
def get_service_instance_id_by_name(nome):
    if not nome:
        return jsonify({'error': 'Nome não fornecido'}), 400

    service_instance = ServiceInstance.query.filter_by(name=nome).first()
    if not service_instance:
        return jsonify({'error': 'Instância de serviço não encontrada'}), 404

    return jsonify({'id': service_instance.id}), 200

@service_instance_bp.route('/<int:service_instance_id>', methods=['DELETE'])
@jwt_required()
@swag_from('../docs/service_instance/delete.yml')
def delete_service_instance(service_instance_id):
    service_instance = ServiceInstance.query.get(service_instance_id)
    if not service_instance:
        return jsonify({'error': 'Instância de serviço não encontrada'}), 404

    db.session.delete(service_instance)
    db.session.commit()

    return jsonify({'message': 'Instância de serviço excluída com sucesso'}), 200