# 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 contextlib
import os
import subprocess

from .tester import Tester
from .util import run_cmd, ARROW_ROOT_DEFAULT, log


def load_version_from_pom():
    import xml.etree.ElementTree as ET
    tree = ET.parse(os.path.join(ARROW_ROOT_DEFAULT, 'java', 'pom.xml'))
    tag_pattern = '{http://maven.apache.org/POM/4.0.0}version'
    version_tag = list(tree.getroot().findall(tag_pattern))[0]
    return version_tag.text


_JAVA_OPTS = [
    "-Dio.netty.tryReflectionSetAccessible=true",
    "-Darrow.struct.conflict.policy=CONFLICT_APPEND",
]

_arrow_version = load_version_from_pom()
_ARROW_TOOLS_JAR = os.environ.get(
    "ARROW_JAVA_INTEGRATION_JAR",
    os.path.join(
        ARROW_ROOT_DEFAULT,
        "java/tools/target/arrow-tools-{}-"
        "jar-with-dependencies.jar".format(_arrow_version),
    ),
)
_ARROW_FLIGHT_JAR = os.environ.get(
    "ARROW_FLIGHT_JAVA_INTEGRATION_JAR",
    os.path.join(
        ARROW_ROOT_DEFAULT,
        "java/flight/flight-integration-tests/target/"
        "flight-integration-tests-{}-jar-with-dependencies.jar".format(
            _arrow_version),
    ),
)
_ARROW_FLIGHT_SERVER = (
    "org.apache.arrow.flight.integration.tests." "IntegrationTestServer"
)
_ARROW_FLIGHT_CLIENT = (
    "org.apache.arrow.flight.integration.tests." "IntegrationTestClient"
)


class JavaTester(Tester):
    PRODUCER = True
    CONSUMER = True
    FLIGHT_SERVER = True
    FLIGHT_CLIENT = True

    name = 'Java'

    def _run(self, arrow_path=None, json_path=None, command='VALIDATE'):
        cmd = (
            ['java'] +
            _JAVA_OPTS +
            ['-cp', _ARROW_TOOLS_JAR, 'org.apache.arrow.tools.Integration']
        )

        if arrow_path is not None:
            cmd.extend(['-a', arrow_path])

        if json_path is not None:
            cmd.extend(['-j', json_path])

        cmd.extend(['-c', command])

        if self.debug:
            log(' '.join(cmd))

        run_cmd(cmd)

    def validate(self, json_path, arrow_path, quirks=None):
        return self._run(arrow_path, json_path, 'VALIDATE')

    def json_to_file(self, json_path, arrow_path):
        return self._run(arrow_path, json_path, 'JSON_TO_ARROW')

    def stream_to_file(self, stream_path, file_path):
        cmd = (
            ['java'] + _JAVA_OPTS + [
                '-cp',
                _ARROW_TOOLS_JAR,
                'org.apache.arrow.tools.StreamToFile',
                stream_path,
                file_path,
            ]
        )
        if self.debug:
            log(' '.join(cmd))
        run_cmd(cmd)

    def file_to_stream(self, file_path, stream_path):
        cmd = (
            ['java'] + _JAVA_OPTS + [
                '-cp',
                _ARROW_TOOLS_JAR,
                'org.apache.arrow.tools.FileToStream',
                file_path,
                stream_path,
            ]
        )
        if self.debug:
            log(' '.join(cmd))
        run_cmd(cmd)

    def flight_request(self, port, json_path=None, scenario_name=None):
        cmd = (
            ['java'] + _JAVA_OPTS + ['-cp', _ARROW_FLIGHT_JAR,
                                     _ARROW_FLIGHT_CLIENT, '-port', str(port)]
        )

        if json_path:
            cmd.extend(('-j', json_path))
        elif scenario_name:
            cmd.extend(('-scenario', scenario_name))
        else:
            raise TypeError('Must provide one of json_path or scenario_name')

        if self.debug:
            log(' '.join(cmd))
        run_cmd(cmd)

    @contextlib.contextmanager
    def flight_server(self, scenario_name=None):
        cmd = (
            ['java'] +
            _JAVA_OPTS +
            ['-cp', _ARROW_FLIGHT_JAR, _ARROW_FLIGHT_SERVER, '-port', '0']
        )
        if scenario_name:
            cmd.extend(('-scenario', scenario_name))
        if self.debug:
            log(' '.join(cmd))
        server = subprocess.Popen(
            cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
        try:
            output = server.stdout.readline().decode()
            if not output.startswith('Server listening on localhost:'):
                server.kill()
                out, err = server.communicate()
                raise RuntimeError(
                    'Flight-Java server did not start properly, '
                    'stdout:\n{}\n\nstderr:\n{}\n'.format(
                        output + out.decode(), err.decode()
                    )
                )
            port = int(output.split(':')[1])
            yield port
        finally:
            server.kill()
            server.wait(5)
