# -*- coding: utf-8 -*-
#
# PartMgr - Category descriptor
#
# Copyright 2014 Michael Buesch <m@bues.ch>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#

from partmgr.core.entity import *
from partmgr.core.util import *


class Category(Entity):
	"Category descriptor."

	def __init__(self, name,
		     parent=None,
		     **kwds):
		Entity.__init__(self,
				name = name,
				entityType = "Category",
				**kwds)
		self.parent = Entity.toId(parent)

	def syncDatabase(self):
		if self.db:
			self.db.modifyCategory(self)

	def getParent(self):
		if not Entity.isValidId(self.parent):
			return None
		return self.db.getCategory(self.parent)

	def setParent(self, parentCategory):
		self.parent = Entity.toId(parentCategory)
		self.syncDatabase()

	def getChildCategories(self):
		return self.db.getChildCategories(self)

	def countChildCategories(self):
		return self.db.countChildCategories(self)

	def getChildStockItems(self):
		return self.db.getStockItemsByCategory(self)

	def countChildStockItems(self):
		return self.db.countStockItemsByCategory(self)

	def delete(self):
		self.db.delCategory(self)
		Entity.delete(self)

	def __eq__(self, other):
		return Entity.__eq__(self, other) and\
		       self.parent == other.parent

	def __hash__(self):
		return (super().__hash__() ^
			hash(self.parent))

	def __repr__(self):
		args = []
		args.append(str(self.name))
		args.append(str(self.description))
		args.append(str(self.flags))
		args.append(str(self.parent))
		args.append(str(self.id))
		args.append(str(self.db))
		return "Category(" + ", ".join(args) + ")"