# Path: rental/models.py
# class Rental(models.Model):
#     """
#     A rental defines the amount of items and has a start and return date.
#     Only items from one depot can be requested for rental at once.
# 
#     When requesting a rental, the user has to enter his full name and email
#     address as well as describing the purpose of his rental. If they are
#     logged in, the user's id will be stored as well.
# 
#     After creating a rental request, it is in the PENDING state. From this,
#     it can be either APPROVED or DECLINED by a depot manager or REVOKED by
#     the requesting user. If all items were returned correctly, it can be
#     set to RETURNED to finish the rental process.
# 
#     :author: Benedikt Seidl
#     """
# 
#     STATE_PENDING = '1'
#     STATE_APPROVED = '2'
#     STATE_DECLINED = '3'
#     STATE_REVOKED = '4'
#     STATE_RETURNED = '5'
#     STATES = (
#         (STATE_PENDING, _('pending')),
#         (STATE_APPROVED, _('approved')),
#         (STATE_DECLINED, _('declined')),
#         (STATE_REVOKED, _('revoked')),
#         (STATE_RETURNED, _('returned')),
#     )
# 
#     uuid = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
#     depot = models.ForeignKey(Depot, on_delete=models.CASCADE)
#     items = models.ManyToManyField(Item, through='ItemRental')
#     firstname = models.CharField(max_length=32)
#     lastname = models.CharField(max_length=32)
#     email = models.EmailField()
#     purpose = models.CharField(max_length=256)
#     user = models.ForeignKey(User, blank=True, null=True, on_delete=models.SET_NULL)
#     start_date = models.DateTimeField()
#     return_date = models.DateTimeField()
#     state = models.CharField(max_length=1, choices=STATES, default=STATE_PENDING)
# 
#     def clean(self):
#         if not self.depot.active:
#             raise ValidationError({'depot': 'The depot has to be active.'})
# 
#         if self.start_date > self.return_date:
#             raise ValidationError({
#                 'start_date': 'The start date must be before the return date.'
#             })
# 
#         if self.start_date < datetime.now() and self.state == self.STATE_PENDING:
#             raise ValidationError({
#                 'start_date': 'The start date must be in the future for new rentals.'
#             })
# 
#     def __str__(self):
#         return 'Rental by %s %s' % (self.firstname, self.lastname)
# 
# Path: rental/state_transitions.py
# def allowed_transitions(managed_by_user, current_state):
#     """
#     Return the list of valid transitions from the current state
#     based on the user's permissions
# 
#     :author: Benedikt Seidl
#     """
# 
#     if managed_by_user:
#         return STATE_TRANSITIONS_MANAGER[current_state]
#     else:
#         return STATE_TRANSITIONS_USER[current_state]


from django.shortcuts import render, get_object_or_404
from django.utils.translation import ugettext as _
from django.views import View
from rental.models import Rental
from rental.state_transitions import allowed_transitions


class RentalDetailView(View):
    """
    Provide necessary information for a rentals detail page

    This includes buttons to change the rentals state,
    an alert with information about the rentals state
    and a list of rented items.

    :author: Florian Stamer
    """

    def get(self, request, rental_uuid):
        rental = get_object_or_404(Rental, pk=rental_uuid)
        managed_by_user = rental.depot.managed_by(request.user)


# Path: rental/models.py
# class Rental(models.Model):
#     """
#     A rental defines the amount of items and has a start and return date.
#     Only items from one depot can be requested for rental at once.
# 
#     When requesting a rental, the user has to enter his full name and email
#     address as well as describing the purpose of his rental. If they are
#     logged in, the user's id will be stored as well.
# 
#     After creating a rental request, it is in the PENDING state. From this,
#     it can be either APPROVED or DECLINED by a depot manager or REVOKED by
#     the requesting user. If all items were returned correctly, it can be
#     set to RETURNED to finish the rental process.
# 
#     :author: Benedikt Seidl
#     """
# 
#     STATE_PENDING = '1'
#     STATE_APPROVED = '2'
#     STATE_DECLINED = '3'
#     STATE_REVOKED = '4'
#     STATE_RETURNED = '5'
#     STATES = (
#         (STATE_PENDING, _('pending')),
#         (STATE_APPROVED, _('approved')),
#         (STATE_DECLINED, _('declined')),
#         (STATE_REVOKED, _('revoked')),
#         (STATE_RETURNED, _('returned')),
#     )
# 
#     uuid = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
#     depot = models.ForeignKey(Depot, on_delete=models.CASCADE)
#     items = models.ManyToManyField(Item, through='ItemRental')
#     firstname = models.CharField(max_length=32)
#     lastname = models.CharField(max_length=32)
#     email = models.EmailField()
#     purpose = models.CharField(max_length=256)
#     user = models.ForeignKey(User, blank=True, null=True, on_delete=models.SET_NULL)
#     start_date = models.DateTimeField()
#     return_date = models.DateTimeField()
#     state = models.CharField(max_length=1, choices=STATES, default=STATE_PENDING)
# 
#     def clean(self):
#         if not self.depot.active:
#             raise ValidationError({'depot': 'The depot has to be active.'})
# 
#         if self.start_date > self.return_date:
#             raise ValidationError({
#                 'start_date': 'The start date must be before the return date.'
#             })
# 
#         if self.start_date < datetime.now() and self.state == self.STATE_PENDING:
#             raise ValidationError({
#                 'start_date': 'The start date must be in the future for new rentals.'
#             })
# 
#     def __str__(self):
#         return 'Rental by %s %s' % (self.firstname, self.lastname)
# 
# Path: rental/state_transitions.py
# def allowed_transitions(managed_by_user, current_state):
#     """
#     Return the list of valid transitions from the current state
#     based on the user's permissions
# 
#     :author: Benedikt Seidl
#     """
# 
#     if managed_by_user:
#         return STATE_TRANSITIONS_MANAGER[current_state]
#     else:
#         return STATE_TRANSITIONS_USER[current_state]


# Path: rental/views/rental_detail_view.py
from django.shortcuts import render, get_object_or_404
from django.utils.translation import ugettext as _
from django.views import View
from rental.models import Rental
from rental.state_transitions import allowed_transitions



class RentalDetailView(View):
    """
    Provide necessary information for a rentals detail page

    This includes buttons to change the rentals state,
    an alert with information about the rentals state
    and a list of rented items.

    :author: Florian Stamer
    """

    def get(self, request, rental_uuid):
        rental = get_object_or_404(Rental, pk=rental_uuid)
        managed_by_user = rental.depot.managed_by(request.user)


        states = allowed_transitions(managed_by_user, rental.state)