# (c) 2013, AnsibleWorks, Michael DeHaan <michael@ansibleworks.com>
#
# This file is part of Ansible Commander
#
# Ansible Commander is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Ansible Commander is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Ansible Commander.  If not, see <http://www.gnu.org/licenses/>.

from django.http import HttpResponse
from django.views.decorators.csrf import csrf_exempt
from lib.main.models import *
from django.contrib.auth.models import User
from lib.main.serializers import *
from lib.main.rbac import *
from django.core.exceptions import PermissionDenied
from rest_framework import mixins
from rest_framework import generics
from rest_framework import permissions
from rest_framework.response import Response
from rest_framework import status
import exceptions
import datetime
from base_views import BaseList, BaseDetail, BaseSubList

class OrganizationsList(BaseList):

    model = Organization
    serializer_class = OrganizationSerializer
    permission_classes = (CustomRbac,)

    # I can see the organizations if:
    #   I am a superuser
    #   I am an admin of the organization 
    #   I am a member of the organization
   
    def _get_queryset(self):
        ''' I can see organizations when I am a superuser, or I am an admin or user in that organization '''
        base = Organization.objects
        if self.request.user.is_superuser:
            return base.all()
        return base.filter(
            admins__in = [ self.request.user ]
        ).distinct() | base.filter(
            users__in = [ self.request.user ]
        ).distinct()

class OrganizationsDetail(BaseDetail):

    model = Organization
    serializer_class = OrganizationSerializer
    permission_classes = (CustomRbac,)

class OrganizationsAuditTrailList(BaseSubList):

    model = AuditTrail
    serializer_class = AuditTrailSerializer
    permission_classes = (CustomRbac,)
    parent_model = Organization
    relationship = 'audit_trail'
    postable = False

    def _get_queryset(self):
        ''' to list tags in the organization, I must be a superuser or org admin '''
        organization = Organization.objects.get(pk=self.kwargs['pk'])
        if not (self.request.user.is_superuser or self.request.user in organization.admins.all()):
            # FIXME: use: organization.can_user_administrate(self.request.user)
            raise PermissionDenied()
        return AuditTrail.objects.filter(organization_by_audit_trail__in = [ organization ])


class OrganizationsUsersList(BaseSubList):
    
    model = User
    serializer_class = UserSerializer
    permission_classes = (CustomRbac,)
    parent_model = Organization
    relationship = 'users'
    postable = True

    def _get_queryset(self):
        ''' to list users in the organization, I must be a superuser or org admin '''
        organization = Organization.objects.get(pk=self.kwargs['pk'])
        if not self.request.user.is_superuser and not self.request.user in organization.admins.all():
            raise PermissionDenied()
        return User.objects.filter(organizations__in = [ organization ])

class OrganizationsAdminsList(BaseSubList):
    
    model = User
    serializer_class = UserSerializer
    permission_classes = (CustomRbac,)
    parent_model = Organization
    relationship = 'admins'
    postable = True

    def _get_queryset(self):
        ''' to list admins in the organization, I must be a superuser or org admin '''
        organization = Organization.objects.get(pk=self.kwargs['pk'])
        if not self.request.user.is_superuser and not self.request.user in organization.admins.all():
            raise PermissionDenied()
        return User.objects.filter(admin_of_organizations__in = [ organization ])

class OrganizationsProjectsList(BaseSubList):
    
    model = Project
    serializer_class = ProjectSerializer
    permission_classes = (CustomRbac,)
    parent_model = Organization  # for sub list
    relationship = 'projects'    # " "
    postable = True
    
    def _get_queryset(self):
        ''' to list projects in the organization, I must be a superuser or org admin '''
        organization = Organization.objects.get(pk=self.kwargs['pk'])
        if not (self.request.user.is_superuser or self.request.user in organization.admins.all()):
            raise PermissionDenied()
        return Project.objects.filter(organizations__in = [ organization ])

class OrganizationsTagsList(BaseSubList):
    
    model = Tag
    serializer_class = TagSerializer
    permission_classes = (CustomRbac,)
    parent_model = Organization  # for sub list
    relationship = 'tags'        # " "
    postable = True

    def _get_queryset(self):
        ''' to list tags in the organization, I must be a superuser or org admin '''
        organization = Organization.objects.get(pk=self.kwargs['pk'])
        if not (self.request.user.is_superuser or self.request.user in organization.admins.all()):
            # FIXME: use: organization.can_user_administrate(self.request.user)
            raise PermissionDenied()
        return Tag.objects.filter(organization_by_tag__in = [ organization ])

class ProjectsDetail(BaseDetail):

    model = Project
    serializer_class = ProjectSerializer
    permission_classes = (CustomRbac,)

class TagsDetail(BaseDetail):

    model = Tag
    serializer_class = TagSerializer
    permission_classes = (CustomRbac,)

class UsersList(BaseList):

    model = User
    serializer_class = UserSerializer
    permission_classes = (CustomRbac,)

    def post(self, request, *args, **kwargs):
        password = request.DATA.get('password', None)
        result = super(UsersList, self).post(request, *args, **kwargs)
        if password:
            pk = result.data['id']
            user = User.objects.get(pk=pk)
            user.set_password(password)
            user.save()
        return result    

    def _get_queryset(self):
        ''' I can see user records when I'm a superuser, I'm that user, I'm their org admin, or I'm on a team with that user '''
        base = User.objects
        if self.request.user.is_superuser:
            return base.all()
        mine = base.filter(pk = self.request.user.pk).distinct() 
        admin_of = base.filter(organizations__in = self.request.user.admin_of_organizations.all()).distinct() 
        same_team = base.filter(teams__in = self.request.user.teams.all()).distinct()
        return mine | admin_of | same_team

class UsersDetail(BaseDetail):

    model = User
    serializer_class = UserSerializer
    permission_classes = (CustomRbac,)

    def put_filter(self, request, *args, **kwargs):
        ''' make sure non-read-only fields that can only be edited by admins, are only edited by admins ''' 
        obj = User.objects.get(pk=kwargs['pk'])
        if EditHelper.illegal_changes(request, obj, UserHelper):
            raise PermissionDenied()
        if 'password' in request.DATA:
            obj.set_password(request.DATA['password'])
            obj.save()
            request.DATA.pop('password')