#
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements.  See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You 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.
#

import flatbuffers
import apisix.runner.utils.common as runner_utils
from apisix.runner.utils.common import VECTOR_TYPE_HEADER
from apisix.runner.utils.common import VECTOR_TYPE_QUERY
from A6.HTTPReqCall import Action as HCAction
from A6.HTTPReqCall import Req as A6HTTPReqCallReq
from A6 import TextEntry as A6TextEntry


def get_request_buffer():
    builder = runner_utils.new_builder()
    # request path
    path = builder.CreateString("/hello/python/runner")
    # request ip
    src_ip = builder.CreateByteVector(bytes([127, 0, 0, 1]))

    # request headers
    head_k = builder.CreateString("hello")
    head_v = builder.CreateString("world")
    A6TextEntry.Start(builder)
    A6TextEntry.AddName(builder, head_k)
    A6TextEntry.AddValue(builder, head_v)
    headers = A6TextEntry.End(builder)
    A6HTTPReqCallReq.StartHeadersVector(builder, 1)
    builder.PrependUOffsetTRelative(headers)
    headers_vec = builder.EndVector()

    A6HTTPReqCallReq.Start(builder)
    A6HTTPReqCallReq.AddId(builder, 1)
    A6HTTPReqCallReq.AddPath(builder, path)
    A6HTTPReqCallReq.AddSrcIp(builder, src_ip)
    A6HTTPReqCallReq.AddHeaders(builder, headers_vec)
    req = A6HTTPReqCallReq.End(builder)
    builder.Finish(req)
    return builder.Output()


def test_get_method_code_by_name():
    for name in runner_utils.methodCodes:
        assert runner_utils.get_method_code_by_name(name) == runner_utils.methodCodes.get(name)


def test_get_method_name_by_code():
    for code in runner_utils.methodNames:
        assert runner_utils.get_method_name_by_code(code) == runner_utils.methodNames.get(code)


def test_new_builder():
    builder = runner_utils.new_builder()
    assert isinstance(builder, flatbuffers.Builder)
    assert builder.Bytes == flatbuffers.Builder(256).Bytes
    assert builder.Bytes != flatbuffers.Builder(512).Bytes


def test_create_dict_entry():
    builder = runner_utils.new_builder()
    entries = runner_utils.create_dict_entry(builder, {})
    assert not entries
    examples = {"q": "hello", "a": "world"}
    entries = runner_utils.create_dict_entry(builder, examples)
    assert len(entries) == 2


def test_create_dict_vector():
    builder = runner_utils.new_builder()
    b = runner_utils.create_dict_vector(builder, {})
    assert not b
    b = runner_utils.create_dict_vector(builder, {"q": "hello", "a": "world"}, HCAction.Action.Rewrite,
                                        VECTOR_TYPE_HEADER)
    assert b > 0
    b = runner_utils.create_dict_vector(builder, {"q": "hello", "a": "world"}, HCAction.Action.Rewrite,
                                        VECTOR_TYPE_QUERY)
    assert b > 0
    b = runner_utils.create_dict_vector(builder, {"q": "hello", "a": "world"}, HCAction.Action.Stop,
                                        VECTOR_TYPE_HEADER)
    assert b > 0
    b = runner_utils.create_dict_vector(builder, {"q": "hello", "a": "world"}, 0, 0)
    assert not b


def test_create_str_vector():
    builder = runner_utils.new_builder()
    b = runner_utils.create_str_vector(builder, "")
    assert not b
    b = runner_utils.create_str_vector(builder, "Hello")
    assert b


def test_get_vector_object():
    obj = runner_utils.get_vector_object(HCAction.Action.Rewrite, VECTOR_TYPE_HEADER)
    assert obj
    obj = runner_utils.get_vector_object(HCAction.Action.Rewrite, VECTOR_TYPE_QUERY)
    assert obj
    obj = runner_utils.get_vector_object(HCAction.Action.Stop, VECTOR_TYPE_HEADER)
    assert obj
    obj = runner_utils.get_vector_object(HCAction.Action.Stop, VECTOR_TYPE_QUERY)
    assert not obj


def test_parse_dict_vector():
    buf = get_request_buffer()
    req = A6HTTPReqCallReq.Req.GetRootAsReq(buf)
    parse_fail = runner_utils.parse_dict_vector(req, 0)
    assert parse_fail == {}
    parse_ok = runner_utils.parse_dict_vector(req, runner_utils.VECTOR_TYPE_HEADER)
    assert parse_ok.get("hello") == "world"


def test_parse_list_vector():
    buf = get_request_buffer()
    req = A6HTTPReqCallReq.Req.GetRootAsReq(buf)
    parse_fail = runner_utils.parse_list_vector(req, 0)
    assert parse_fail == []
    parse_ok = runner_utils.parse_list_vector(req, runner_utils.VECTOR_TYPE_SOURCE_IP)
    assert parse_ok == [127, 0, 0, 1]