import bootstrapvz.common.tasks.host as host
import bootstrapvz.common.tasks.volume as volume
from bootstrapvz.base import Task
from bootstrapvz.common import phases


class AddRequiredCommands(Task):
    description = 'Adding commands required for creating and mounting logical volumes'
    phase = phases.validation
    successors = [host.CheckExternalCommands]

    @classmethod
    def run(cls, info):
        from bootstrapvz.common.fs.logicalvolume import LogicalVolume
        if isinstance(info.volume, LogicalVolume):
            info.host_dependencies['lvcreate'] = 'lvm2'
            info.host_dependencies['losetup'] = 'mount'


class Create(Task):
    description = 'Creating a Logical volume'
    phase = phases.volume_creation
    successors = [volume.Attach]

    @classmethod
    def run(cls, info):
        info.volume.create(volumegroup=info.manifest.volume['volumegroup'],
                           logicalvolume=info.manifest.volume['logicalvolume'])


class Delete(Task):
    description = 'Deleting a Logical volume'
    phase = phases.cleaning

    @classmethod
    def run(cls, info):
        info.volume.delete()