import logging
import json

from ckan.common import _
from ckan.logic import ValidationError
from ckan.plugins import toolkit

log = logging.getLogger(__name__)

def rating_package_create(context, data_dict):
    '''Review a dataset (package).
    :param package: the name or id of the dataset to rate
    :type package: string
    :param rating: the rating to give to the dataset, an integer between 1 and 5
    :type rating: int
    '''
    model = context.get('model')
    user = context.get('user')
      
    user = model.User.by_name(user)

    from ckan.model import User
    if not isinstance(user, User):
        user = toolkit.request.environ.get('REMOTE_ADDR')

    package_ref = data_dict.get('package')
    rating = data_dict.get('rating')
    error = None
    if not package_ref:
        error = _('You must supply a package id or name '
                     '(parameter "package").')
    elif not rating:
        error = _('You must supply a rating (parameter "rating").')
    else:
        try:
            rating = float(rating)
        except ValueError:
            error = _('Rating must be an integer value.')
        else:
            package = model.Package.get(package_ref)
            if rating < model.MIN_RATING or rating > model.MAX_RATING:
                error = _('Rating must be between %i and %i.') \
                    % (model.MIN_RATING, model.MAX_RATING)
            elif not package:
                error = _('Not found') + ': %r' % package_ref
    if error:
        raise ValidationError(error)

    from ckanext.rating.model import Rating
    Rating.create_package_rating(package.id, rating, user)

    return Rating.get_package_rating(package.id)

def rating_package_get(context, data_dict):
    package_id = data_dict.get('package_id')

    error = None

    if not package_id:
        error = _('You must supply a package id '
                     '(parameter "package_id").')
    if error:
        raise ValidationError(error)

    from ckanext.rating.model import Rating

    return Rating.get_package_rating(package_id)