# Copyright (C) 2010-2023 RhodeCode GmbH
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License, version 3
# (only), as published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#
# This program is dual-licensed. If you wish to learn more about the
# RhodeCode Enterprise Edition, including its added features, Support services,
# and proprietary license terms, please see https://rhodecode.com/licenses/

import subprocess
import os
import sys
import tempfile

import pytest
from sqlalchemy.engine import url

from rhodecode.lib.str_utils import safe_str, safe_bytes
from rhodecode.tests.fixtures.rc_fixture import TestINI


def _get_dbs_from_metafunc(metafunc):
    dbs_mark = metafunc.definition.get_closest_marker("dbs")

    if dbs_mark:
        # Supported backends by this test function, created from pytest.mark.dbs
        backends = dbs_mark.args
    else:
        backends = metafunc.config.getoption("--dbs")
    return backends


def pytest_generate_tests(metafunc):
    # Support test generation based on --dbs parameter
    if "db_backend" in metafunc.fixturenames:
        requested_backends = set(metafunc.config.getoption("--dbs"))
        backends = _get_dbs_from_metafunc(metafunc)
        backends = requested_backends.intersection(backends)
        # TODO: johbo: Disabling a backend did not work out with
        # parametrization, find better way to achieve this.
        if not backends:
            metafunc.function._skip = True
        metafunc.parametrize("db_backend_name", backends)


def pytest_collection_modifyitems(session, config, items):
    remaining = [i for i in items if not getattr(i.obj, "_skip", False)]
    items[:] = remaining


@pytest.fixture()
def db_backend(request, db_backend_name, ini_config, tmpdir_factory):
    basetemp = tmpdir_factory.getbasetemp().strpath
    klass = _get_backend(db_backend_name)

    option_name = "--{}-connection-string".format(db_backend_name)
    connection_string = request.config.getoption(option_name) or None

    return klass(config_file=ini_config, basetemp=basetemp, connection_string=connection_string)


def _get_backend(backend_type):
    return {"sqlite": SQLiteDBBackend, "postgres": PostgresDBBackend, "mysql": MySQLDBBackend, "": EmptyDBBackend}[
        backend_type
    ]


class DBBackend(object):
    _store = os.path.dirname(os.path.abspath(__file__))
    _type = None
    _base_ini_config = [{"app:main": {"vcs.start_server": "false", "startup.import_repos": "false"}}]
    _db_url = [{"app:main": {"sqlalchemy.db1.url": ""}}]
    _base_db_name = "rhodecode_test_db_backend"
    std_env = {"RC_TEST": "0"}

    def __init__(self, config_file, db_name=None, basetemp=None, connection_string=None):
        self.fixture_store = os.path.join(self._store, self._type)
        self.db_name = db_name or self._base_db_name
        self._base_ini_file = config_file
        self.stderr = ""
        self.stdout = ""
        self._basetemp = basetemp or tempfile.gettempdir()
        self._repos_location = os.path.join(self._basetemp, "rc_test_repos")
        self.connection_string = connection_string

    @property
    def connection_string(self):
        return self._connection_string

    @connection_string.setter
    def connection_string(self, new_connection_string):
        if not new_connection_string:
            new_connection_string = self.get_default_connection_string()
        else:
            new_connection_string = new_connection_string.format(db_name=self.db_name)
        url_parts = url.make_url(new_connection_string)
        self._connection_string = new_connection_string
        self.user = url_parts.username
        self.password = url_parts.password
        self.host = url_parts.host

    def get_default_connection_string(self):
        raise NotImplementedError("default connection_string is required.")

    def execute(self, cmd, env=None, *args):
        """
        Runs command on the system with given ``args``.
        """

        command = cmd + " " + " ".join(args)
        sys.stdout.write(f"CMD: {command}")

        # Tell Python to use UTF-8 encoding out stdout
        _env = os.environ.copy()
        _env["PYTHONIOENCODING"] = "UTF-8"
        _env.update(self.std_env)
        if env:
            _env.update(env)

        self.p = subprocess.Popen(command, shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE, env=_env)
        self.stdout, self.stderr = self.p.communicate()
        stdout_str = safe_str(self.stdout)
        sys.stdout.write(f"COMMAND:{command}\n")
        sys.stdout.write(stdout_str)
        return self.stdout, self.stderr

    def assert_returncode_success(self):
        from rich import print as pprint

        if not self.p.returncode == 0:
            pprint(safe_str(self.stderr))
            raise AssertionError(f"non 0 retcode:{self.p.returncode}")

    def assert_correct_output(self, stdout, version):
        assert b"UPGRADE FOR STEP %b COMPLETED" % safe_bytes(version) in stdout

    def setup_rhodecode_db(self, ini_params=None, env=None):
        if not ini_params:
            ini_params = self._base_ini_config

        ini_params.extend(self._db_url)
        with TestINI(self._base_ini_file, ini_params, self._type, destroy=True) as _ini_file:
            if not os.path.isdir(self._repos_location):
                os.makedirs(self._repos_location)

            return self.execute(
                "rc-setup-app {0} --user=marcink "
                "--email=marcin@rhodeocode.com --password={1} "
                "--repos={2} --force-yes".format(_ini_file, "qweqwe", self._repos_location),
                env=env,
            )

    def upgrade_database(self, ini_params=None):
        if not ini_params:
            ini_params = self._base_ini_config
        ini_params.extend(self._db_url)

        test_ini = TestINI(self._base_ini_file, ini_params, self._type, destroy=True)
        with test_ini as ini_file:
            if not os.path.isdir(self._repos_location):
                os.makedirs(self._repos_location)

            return self.execute("rc-upgrade-db {0} --force-yes".format(ini_file))

    def setup_db(self):
        raise NotImplementedError

    def teardown_db(self):
        raise NotImplementedError

    def import_dump(self, dumpname):
        raise NotImplementedError


class EmptyDBBackend(DBBackend):
    _type = ""

    def setup_db(self):
        pass

    def teardown_db(self):
        pass

    def import_dump(self, dumpname):
        pass

    def assert_returncode_success(self):
        assert True


class SQLiteDBBackend(DBBackend):
    _type = "sqlite"

    def get_default_connection_string(self):
        return "sqlite:///{}/{}.sqlite".format(self._basetemp, self.db_name)

    def setup_db(self):
        # dump schema for tests
        # cp -v $TEST_DB_NAME
        self._db_url = [{"app:main": {"sqlalchemy.db1.url": self.connection_string}}]

    def import_dump(self, dumpname):
        dump = os.path.join(self.fixture_store, dumpname)
        target = os.path.join(self._basetemp, "{0.db_name}.sqlite".format(self))
        return self.execute(f"cp -v {dump} {target}")

    def teardown_db(self):
        target_db = os.path.join(self._basetemp, self.db_name)
        return self.execute(f"rm -rf {target_db}.sqlite")


class MySQLDBBackend(DBBackend):
    _type = "mysql"

    def get_default_connection_string(self):
        return "mysql://root:qweqwe@127.0.0.1/{}".format(self.db_name)

    def setup_db(self):
        # dump schema for tests
        # mysqldump -uroot -pqweqwe $TEST_DB_NAME
        self._db_url = [{"app:main": {"sqlalchemy.db1.url": self.connection_string}}]
        return self.execute(
            "mysql -v -u{} -p{} -e 'create database '{}';'".format(self.user, self.password, self.db_name)
        )

    def import_dump(self, dumpname):
        dump = os.path.join(self.fixture_store, dumpname)
        return self.execute("mysql -u{} -p{} {} < {}".format(self.user, self.password, self.db_name, dump))

    def teardown_db(self):
        return self.execute(
            "mysql -v -u{} -p{} -e 'drop database '{}';'".format(self.user, self.password, self.db_name)
        )


class PostgresDBBackend(DBBackend):
    _type = "postgres"

    def get_default_connection_string(self):
        return "postgresql://postgres:qweqwe@localhost/{}".format(self.db_name)

    def setup_db(self):
        # dump schema for tests
        # pg_dump -U postgres -h localhost $TEST_DB_NAME
        self._db_url = [{"app:main": {"sqlalchemy.db1.url": self.connection_string}}]
        cmd = f"PGPASSWORD={self.password} psql -U {self.user} -h localhost -c 'create database '{self.db_name}';'"
        return self.execute(cmd)

    def teardown_db(self):
        cmd = f"PGPASSWORD={self.password} psql -U {self.user} -h localhost -c 'drop database if exists '{self.db_name}';'"
        return self.execute(cmd)

    def import_dump(self, dumpname):
        dump = os.path.join(self.fixture_store, dumpname)
        cmd = f"PGPASSWORD={self.password} psql -U {self.user} -h localhost -d {self.db_name} -1 -f {dump}"
        return self.execute(cmd)