##############################################################################
#
# Copyright (c) 2004-2008 Tiny SPRL (http://tiny.be) All Rights Reserved.
#
# $Id$
#
# WARNING: This program as such is intended to be used by professional
# programmers who take the whole responsability of assessing all potential
# consequences resulting from its eventual inadequacies and bugs
# End users who are looking for a ready-to-use solution with commercial
# garantees and support are strongly adviced to contract a Free Software
# Service Company
#
# 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
###############################################################################

import wkf_logs
import workitem

import netsvc
import pooler

def create(cr, ident, wkf_id):
	(uid,res_type,res_id) = ident
	cr.execute("select nextval('wkf_instance_id_seq')")
	id_new = cr.fetchone()[0]
	cr.execute('insert into wkf_instance (id,res_type,res_id,uid,wkf_id) values (%d,%s,%s,%s,%s)', (id_new,res_type,res_id,uid,wkf_id))
	cr.execute('select * from wkf_activity where flow_start=True and wkf_id=%d', (wkf_id,))
	res = cr.dictfetchall()
	stack = []
	workitem.create(cr, res, id_new, ident, stack=stack)
	update(cr, id_new, ident)
	return id_new

def delete(cr, ident):
	(uid,res_type,res_id) = ident
	cr.execute('delete from wkf_instance where res_id=%d and res_type=%s', (res_id,res_type))

def validate(cr, inst_id, ident, signal, force_running=False):
	cr.execute("select * from wkf_workitem where inst_id=%d", (inst_id,))
	for witem in cr.dictfetchall():
		print '-----'
		stack = []
		workitem.process(cr, witem, ident, signal, force_running, stack=stack)
		# An action is returned
		print '----- Got', stack
	_update_end(cr, inst_id, ident)
	return stack and stack[0] or False

def update(cr, inst_id, ident):
	cr.execute("select * from wkf_workitem where inst_id=%d", (inst_id,))
	for witem in cr.dictfetchall():
		stack = []
		workitem.process(cr, witem, ident, stack=stack)
		print 'End Update'
	return _update_end(cr, inst_id, ident)

def _update_end(cr, inst_id, ident):
	cr.execute('select wkf_id from wkf_instance where id=%d', (inst_id,))
	wkf_id = cr.fetchone()[0]
	cr.execute('select state,flow_stop from wkf_workitem w left join wkf_activity a on (a.id=w.act_id) where w.inst_id=%d', (inst_id,))
	ok=True
	for r in cr.fetchall():
		if (r[0]<>'complete') or not r[1]:
			ok=False
			break
	if ok:
		cr.execute('select distinct a.name from wkf_activity a left join wkf_workitem w on (a.id=w.act_id) where w.inst_id=%d', (inst_id,))
		act_names = cr.fetchall()
		cr.execute("update wkf_instance set state='complete' where id=%d", (inst_id,))
		cr.execute("update wkf_workitem set state='complete' where subflow_id=%d", (inst_id,))
		cr.execute("select i.id,w.osv,i.res_id from wkf_instance i left join wkf w on (i.wkf_id=w.id) where i.id in (select inst_id from wkf_workitem where subflow_id=%d)", (inst_id,))
		for i in cr.fetchall():
			for act_name in act_names:
				validate(cr, i[0], (ident[0],i[1],i[2]), 'subflow.'+act_name[0])
	return ok