# Copyright (c) 2012 netzguerilla.net <iro@netzguerilla.net>
# 
# This file is part of Iro.
# 
# Permission is hereby granted, free of charge, to any person obtaining a copy of
# this software and associated documentation files (the "Software"), to deal in
# the Software without restriction, including without limitation the rights to use,
# copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
# #Software, and to permit persons to whom the Software is furnished to do so,
# subject to the following conditions:
# 
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
# 
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
# INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
# PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
# HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
# SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

from twisted.trial import unittest

from sqlalchemy import create_engine, pool
from tempfile import mkdtemp

from shutil import rmtree
import atexit 
from ngdatabase.mysql import Server, createConfig, Database

from iro.model import setEngine, setPool
from iro.model.utils import WithSession
from iro.model.schema import Base

from iro.controller.pool import dbPool

from .utils import DummyObserver

class DBTestCase(unittest.TestCase):
    '''a TestCase with DB connection
    you have to set self.session manually in setUp'''
    def __init__(self,*args,**kwargs):
        unittest.TestCase.__init__(self,*args,**kwargs)
        self.engine = md.engine

    def setUp(self):
        md.setUp()
        self.log = DummyObserver()
        self.log.start()

    def tearDown(self):
        self.log.stop()
        self.__cleanDB()
    
    def session(self,autocommit=True):
        '''returns a WithSession'''
        return WithSession(self.engine,autocommit)
    
    def __cleanDB(self):
        '''cleaning database'''
        with self.session() as session:
            for table in reversed(Base.metadata.sorted_tables):
                session.execute(table.delete())


class SampleDatabase(Database):
    def createPassword(self):
        self.password="test"
        return self.password

class ModuleData(object):
    def __init__(self):
        self.create()

    def close(self):
        if self.valid:
            self.server.stop()
            rmtree(self.tdir)
            self.valid= False

    def create(self):
        self.tdir = mkdtemp(prefix='iro-mysql-')
        self.server = Server('%s/my.cnf'%self.tdir)
        self.db = SampleDatabase("test","test",'%s/my.cnf'%self.tdir)
        self.dburl = 'mysql://test:test@localhost/test?unix_socket=%s/socket'%self.tdir
        self.engine = create_engine(self.dburl, 
                poolclass = pool.SingletonThreadPool,  pool_size=dbPool.maxthreads, )#echo=True)
        self.valid = False

    def setUp(self):
        if not self.valid:
            with open('%s/my.cnf'%self.tdir,'w') as cnf:
                cnf.write(createConfig(self.tdir))
            self.server.create()
            self.server.start()
            self.db.create()
            Base.metadata.create_all(self.engine)
            setEngine(self.engine)
            setPool(dbPool)
            self.valid = True
    

md=ModuleData()
atexit.register(md.close)