#
# Copyright (c) 2020 The FreeBSD Foundation
#
# This software1 was developed by John-Mark Gurney under sponsorship
# from the FreeBSD Foundation.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1.  Redistributions of source code must retain the above copyright
#     notice, this list of conditions and the following disclaimer.
# 2.  Redistributions in binary form must reproduce the above copyright
#     notice, this list of conditions and the following disclaimer in the
#     documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#

# Documentation for orm:
# https://github.com/encode/orm
#
# To interactively work with a database:
#   import bitelab.data
#   import databases
#   database = databases.Database('sqlite:///' + dbpath)
#   data = bitelab.data.make_orm(database)

from typing import Optional, Union, Dict, Any
from pydantic import BaseModel, Field
from datetime import datetime

import databases
import orm
import sqlalchemy
import tempfile
import unittest

__all__ = [ 'make_orm', 'BoardClassInfo', 'Board', 'Error' ]

class BoardClassInfo(BaseModel):
	clsname: str
	arch: str

class Board(BaseModel):
	name: str
	brdclass: str
	reserved: bool
	attrs: Dict[str, Any] = Field(default_factory=dict)

	class Config:
		orm_mode = True

class Error(BaseModel):
	error: str
	board: Optional[Board]

def _issubclass(a, b):
	try:
		return issubclass(a, b)
	except TypeError:
		return False

class DataWrapper(object):
	pass

def make_orm(database):
	metadata = sqlalchemy.MetaData()

	class BoardStatus(orm.Model):
		__tablename__ = 'boardstatus'
		__database__ = database
		__metadata__ = metadata

		board = orm.Text(primary_key=True)
		user = orm.Text(index=True)
		time_reserved = orm.DateTime(default=lambda: datetime.utcnow())

	class APIKey(orm.Model):
		__tablename__ = 'apikeys'
		__database__ = database
		__metadata__ = metadata

		user = orm.Text(index=True)
		key = orm.Text(primary_key=True)

	engine = sqlalchemy.create_engine(str(database.url))
	metadata.create_all(engine)

	r = DataWrapper()

	lcls = locals()
	for i in [ 'engine', 'metadata', ] + [ x for x in lcls if _issubclass(lcls[x], orm.Model) ]:
		setattr(r, i, lcls[i])

	return r

async def _setup_data(data):
	await data.APIKey.objects.create(user='foo', key='thisisanapikey')
	await data.APIKey.objects.create(user='bar', key='anotherlongapikey')

class TestDatabase(unittest.IsolatedAsyncioTestCase):
	def setUp(self):
		# setup temporary directory
		self.dbtempfile = tempfile.NamedTemporaryFile()

		self.database = databases.Database('sqlite:///' +
		    self.dbtempfile.name)
		self.data = make_orm(self.database)

	def tearDown(self):
		self.data = None
		self.database = None
		self.dbtempfile = None

	async def test_apikey(self):
		data = self.data

		# that the test database starts empty
		self.assertEqual(await data.APIKey.objects.all(), [])

		# that when it is populated with test data
		await _setup_data(data)

		# the data can be accessed
		self.assertEqual((await data.APIKey.objects.get(
		    key='thisisanapikey')).user, 'foo')
		self.assertEqual((await data.APIKey.objects.get(
		    key='anotherlongapikey')).user, 'bar')