from enum import Enum


class BucketResourceType(Enum):
    NetworkLink = 'network_link'
    CpuResource = 'cpu_resource'


class BucketResource:
    type: BucketResourceType = BucketResourceType.NetworkLink
    currentUsage: int = 0
    capacity: int = 0

    def reserve(self, resource: int) -> bool:
        if self.capacity == self.currentUsage or resource > self.capacity - self.currentUsage:
            return False
        else:
            return True

    def release(self, resource: int) -> bool:
        if self.currentUsage == 0 or self.currentUsage - resource < 0:
            return False
        else:
            return True

    def releaseAll(self) -> bool:
        self.currentUsage = 0
        return True