# Copyright 2017-present Open Networking Foundation
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.


from __future__ import absolute_import
import unittest
from xosgenx.jinja2_extensions import FieldNotFound
from xosgenx.generator import XOSProcessor, XOSProcessorArgs
from helpers import XProtoTestHelpers
from functools import reduce


class XProtoFieldGraphTest(unittest.TestCase):
    def _test_field_graph(self):
        xproto = """
message VRouterDevice (PlCoreBase){
     optional string name = 1 [help_text = "device friendly name", max_length = 20, null = True, db_index = False, blank = True, unique_with="openflow_id"];
     required string openflow_id = 2 [help_text = "device identifier in ONOS", max_length = 20, null = False, db_index = False, blank = False, unique_with="name"];
     required string config_key = 3 [default = "basic", max_length = 32, blank = False, help_text = "configuration key", null = False, db_index = False, unique_with="driver"];
     required string driver = 4 [help_text = "driver type", max_length = 32, null = False, db_index = False, blank = False, unique_with="vrouter_service"];
     required manytoone vrouter_service->VRouterService:devices = 5 [db_index = True, null = False, blank = False];
     required string A = 6 [unique_with="B"];
     required string B = 7 [unique_with="C"];
     required string C = 8 [unique_with="A"];
     required string D = 9;
     required string E = 10 [unique_with="F,G"];
     required string F = 11;
     required string G = 12;
}
"""
        target = XProtoTestHelpers.write_tmp_target(
            """
{{ xproto_field_graph_components(proto.messages.0.fields, proto.messages.0) }}
"""
        )

        args = XOSProcessorArgs(inputs=xproto, target=target)
        output = XOSProcessor.process(args)
        output = eval(output)
        self.assertIn({"A", "B", "C"}, output)
        self.assertIn({"openflow_id", "name"}, output)
        self.assertIn({"config_key", "vrouter_service", "driver"}, output)
        self.assertIn({"E", "F", "G"}, output)

        union = reduce(lambda acc, x: acc | x, output)
        self.assertNotIn("D", union)

    def test_missing_field(self):
        xproto = """
message Foo (PlCoreBase){
     required string A = 6 [unique_with="B"];
}
"""
        target = XProtoTestHelpers.write_tmp_target(
            """
{{ xproto_field_graph_components(proto.messages.0.fields, proto.messages.0) }}
"""
        )

        def generate():
            args = XOSProcessorArgs(inputs=xproto, target=target)
            output = XOSProcessor.process(args)

        with self.assertRaises(FieldNotFound) as e:
            generate()

        self.assertEqual(
            str(e.exception),
            'Field "B" not found in model "Foo", referenced from field "A" by option "unique_with"',
        )


if __name__ == "__main__":
    unittest.main()