from bootstrapvz.base import Task
from bootstrapvz.common import phases
from bootstrapvz.common.tasks import apt
import os


class CheckAssetsPath(Task):
	description = 'Checking whether the assets path exist'
	phase = phases.preparation

	@classmethod
	def run(cls, info):
		from bootstrapvz.common.exceptions import TaskError
		assets = info.manifest.plugins['chef']['assets']
		if not os.path.exists(assets):
			msg = 'The assets directory {assets} does not exist.'.format(assets=assets)
			raise TaskError(msg)
		if not os.path.isdir(assets):
			msg = 'The assets path {assets} does not point to a directory.'.format(assets=assets)
			raise TaskError(msg)


class AddPackages(Task):
	description = 'Add chef package'
	phase = phases.preparation
	predecessors = [apt.AddDefaultSources]

	@classmethod
	def run(cls, info):
		info.packages.add('chef')


class CopyChefAssets(Task):
	description = 'Copying chef assets'
	phase = phases.system_modification

	@classmethod
	def run(cls, info):
		from bootstrapvz.common.tools import copy_tree
		copy_tree(info.manifest.plugins['chef']['assets'], os.path.join(info.root, 'etc/chef'))