from django.utils.html import format_html


class OrchestraModel:
    """ Base class from which all orchestra models will inherit. """
    api_name = None
    verbose_name = None
    fields = ()
    param_defaults = {}

    def __init__(self, **kwargs):
        if self.verbose_name is None:
            self.verbose_name = self.api_name

        for (param, default) in self.param_defaults.items():
            setattr(self, param, kwargs.get(param, default))

    # def get(self, key):
    #     # retrieve attr of the object and if undefined get raw data
    #     return getattr(self, key, self.data.get(key))

    @classmethod
    def new_from_json(cls, data, **kwargs):
        """ Create a new instance based on a JSON dict. Any kwargs should be
        supplied by the inherited, calling class.
        Args:
            data: A JSON dict, as converted from the JSON in the orchestra API.
        """

        json_data = data.copy()
        if kwargs:
            for key, val in kwargs.items():
                json_data[key] = val

        c = cls(**json_data)
        c._json = data
        # TODO(@slamora) remove/replace by private variable to ovoid name collisions
        c.data = data
        return c


class DatabaseUser(OrchestraModel):
    api_name = 'databaseusers'
    fields = ('username',)
    param_defaults = {
        'username': None,
    }


class DatabaseService(OrchestraModel):
    api_name = 'database'
    fields = ('name', 'type', 'users')
    param_defaults = {
        "id": None,
        "name": None,
        "type": None,
        "users": None,
    }

    @classmethod
    def new_from_json(cls, data, **kwargs):
        users = None
        if 'users' in data:
            users = [DatabaseUser.new_from_json(user_data) for user_data in data['users']]
        return super().new_from_json(data=data, users=users)


class MailService(OrchestraModel):
    api_name = 'address'
    verbose_name = 'Mail'
    fields = ('mail_address', 'aliases', 'type', 'type_detail')

    FORWARD = 'forward'
    MAILBOX = 'mailbox'

    @property
    def aliases(self):
        return [
            name + '@' + self.data['domain']['name'] for name in self.data['names'][1:]
        ]

    @property
    def mail_address(self):
        return self.data['names'][0] + '@' + self.data['domain']['name']

    @property
    def type(self):
        if self.data['forward']:
            return self.FORWARD
        return self.MAILBOX

    @property
    def type_detail(self):
        if self.type == self.FORWARD:
            return self.data['forward']
        # TODO(@slamora) retrieve mailbox usage
        return {'usage': 0, 'total': 213}


class MailinglistService(OrchestraModel):
    api_name = 'mailinglist'
    verbose_name = 'Mailing list'
    fields = ('name', 'status', 'address_name', 'admin_email', 'configure')
    param_defaults = {
        'name': None,
        'admin_email': None,
    }

    @property
    def status(self):
        # TODO(@slamora): where retrieve if the list is active?
        return 'active'

    @property
    def address_name(self):
        return "{}@{}".format(self.data['address_name'], self.data['address_domain']['name'])

    @property
    def configure(self):
        # TODO(@slamora): build mailtran absolute URL
        return format_html('<a href="#TODO">Mailtrain</a>')