from django.contrib.auth.models import User

from pytask.taskapp.models import Profile, Task, Comment, Credit

""" A collection of helper methods. note that there is no validation done here.

we take care of validation and others checks in methods that invoke these methods.

"""

def updateProfile(user_profile, properties):

    """ updates the given properties in the profile for a user. 

    args:

        user_profile : a profile object

        properties : a dictionary with attributes to set as keys and corresponding values

    """

    for attr,value in properties.items():

        user_profile.__setattr__(attr,value)

    user_profile.save()

def createUser(username,email,password,dob,gender):

    """ create a user and create a profile and update its properties 

    args:

        username : a username that does not exist

        email : a valid email

        password : a password

        dob : a date object

        gender : u'M'/u'F' 

    """

    try:

        user = User.objects.get(username=username)

        return user

    except:        

        user = User(username=username, email=email)

        user.set_password(password)

        user.save()

        properties = {'dob':dob, 'gender':gender}

        user_profile = Profile(user=user)

        updateProfile(user_profile, properties)

        return user

def createSuUser(username,email,password,dob,gender):

    """ create user using createUser method and set the is_superuser flag """

    su_user = createUser(username,email,password,dob,gender)

    su_user.is_staff = True

    su_user.is_superuser = True

    su_user.save()

    return su_user

def changeRole(role, user):

    """ change the status of user to role.

    """

    user_profile = user.get_profile()

    user_profile.rights = role

    user_profile.save()