from rest_framework import serializers, viewsets

from app import models
from .tasks import TaskIDsSerializer


class ProjectSerializer(serializers.ModelSerializer):
    tasks = TaskIDsSerializer(many=True, read_only=True)
    owner = serializers.HiddenField(
            default=serializers.CurrentUserDefault()
        )
    created_at = serializers.ReadOnlyField()

    class Meta:
        model = models.Project
        exclude = ('deleting', )


class ProjectViewSet(viewsets.ModelViewSet):
    """
    Projects the current user has access to. Projects are the building blocks
    of processing. Each project can have zero or more tasks associated with it.
    Users can fine tune the permissions on projects, including whether users/groups have 
    access to view, add, change or delete them.<br/><br/>
    - /api/projects/&lt;projectId&gt;/tasks : list all tasks belonging to a project<br/>
    - /api/projects/&lt;projectId&gt;/tasks/&lt;taskId&gt; : get task details
    """
    filter_fields = ('id', 'name', 'description', 'created_at')
    serializer_class = ProjectSerializer
    queryset = models.Project.objects.filter(deleting=False)
    ordering_fields = '__all__'