from django.contrib.auth import get_user_model

from rest_framework import serializers
from .models import VMHost, VMProduct, VMSnapshotProduct, VMDiskProduct, VMDiskImageProduct

GB_SSD_PER_DAY=0.012
GB_HDD_PER_DAY=0.0006

GB_SSD_PER_DAY=0.012
GB_HDD_PER_DAY=0.0006


class VMHostSerializer(serializers.ModelSerializer):
    class Meta:
        model = VMHost
        fields = '__all__'


class VMProductSerializer(serializers.ModelSerializer):
    class Meta:
        model = VMProduct
        fields = '__all__'

class VMDiskProductSerializer(serializers.ModelSerializer):
#    vm = VMProductSerializer()

    class Meta:
        model = VMDiskProduct
        fields = '__all__'

class VMDiskImageProductSerializer(serializers.ModelSerializer):
    class Meta:
        model = VMDiskImageProduct
        fields = '__all__'

class VMSnapshotProductSerializer(serializers.ModelSerializer):
    class Meta:
        model = VMSnapshotProduct
        fields = '__all__'


    # verify that vm.owner == user.request
    def validate_vm(self, value):
        if not value.owner == self.context['request'].user:
            raise serializers.ValidationError("VM {} not found for owner {}.".format(value,
                                                                                     self.context['request'].user))
        disks = VMDiskProduct.objects.filter(vm=value)

        if len(disks) == 0:
            raise serializers.ValidationError("VM {} does not have any disks, cannot snapshot".format(value.uuid))

        return value

    pricing = {}
    pricing['per_gb_ssd'] = 0.012
    pricing['per_gb_hdd'] = 0.0006
    pricing['recurring_period'] = 'per_day'