from flask import request, abort, make_response
from flask.views import View

from pycs import db
from pycs.database.Project import Project
from pycs.database.Label import Label
from pycs.frontend.notifications.NotificationManager import NotificationManager


class CreateLabel(View):
    """
    create a new label
    """
    # pylint: disable=arguments-differ
    methods = ['POST']


    def dispatch_request(self, identifier):
        # extract request data
        data = request.get_json(force=True)

        if 'name' not in data:
            abort(400)

        name = data['name']
        reference = data.get('reference', name.lower())
        parent = data.get('parent')

        # find project
        project = Project.query.get(identifier)
        if project is None:
            abort(404)

        # insert label
        label, is_new = project.create_label(name,
            reference=reference,
            parent_id=parent)

        if not is_new:
            msg = f"Label creation invoked, but this label already existed: {label}"
            abort(400, msg)

        # send notification
        NotificationManager.created("label", label.id, Label)

        # return success response
        return make_response()