import contextlib
import os
import urllib.error
import urllib.parse
import urllib.request

from helpers.cluster import ClickHouseCluster


class SimpleCluster:
    def close(self):
        self.cluster.shutdown()

    def __init__(self, cluster, name, config_dir):
        self.cluster = cluster
        self.instance = self.add_instance(name, config_dir)
        cluster.start()

    def add_instance(self, name, config_dir):
        script_path = os.path.dirname(os.path.realpath(__file__))
        return self.cluster.add_instance(
            name, main_configs=[os.path.join(script_path, config_dir, "config.xml")]
        )


def test_dynamic_query_handler():
    with contextlib.closing(
        SimpleCluster(
            ClickHouseCluster(__file__), "dynamic_handler", "test_dynamic_handler"
        )
    ) as cluster:
        test_query = urllib.parse.quote_plus(
            "SELECT * FROM system.settings WHERE name = 'max_threads'"
        )

        assert (
            404
            == cluster.instance.http_request(
                "?max_threads=1", method="GET", headers={"XXX": "xxx"}
            ).status_code
        )

        assert (
            404
            == cluster.instance.http_request(
                "test_dynamic_handler_get?max_threads=1",
                method="POST",
                headers={"XXX": "xxx"},
            ).status_code
        )

        assert (
            404
            == cluster.instance.http_request(
                "test_dynamic_handler_get?max_threads=1",
                method="GET",
                headers={"XXX": "bad"},
            ).status_code
        )

        assert (
            400
            == cluster.instance.http_request(
                "test_dynamic_handler_get?max_threads=1",
                method="GET",
                headers={"XXX": "xxx"},
            ).status_code
        )

        res_default = cluster.instance.http_request(
            "test_dynamic_handler_get?max_threads=1&get_dynamic_handler_query="
            + test_query,
            method="GET",
            headers={"XXX": "xxx"},
        )
        assert 200 == res_default.status_code
        assert (
            "text/tab-separated-values; charset=UTF-8"
            == res_default.headers["content-type"]
        )

        res_custom_ct = cluster.instance.http_request(
            "test_dynamic_handler_get_custom_content_type?max_threads=1&get_dynamic_handler_query="
            + test_query,
            method="GET",
            headers={"XXX": "xxx"},
        )
        assert 200 == res_custom_ct.status_code
        assert (
            "application/whatever; charset=cp1337"
            == res_custom_ct.headers["content-type"]
        )
        assert "it works" == res_custom_ct.headers["X-Test-Http-Response-Headers-Works"]
        assert (
            "also works"
            == res_custom_ct.headers["X-Test-Http-Response-Headers-Even-Multiple"]
        )


def test_predefined_query_handler():
    with contextlib.closing(
        SimpleCluster(
            ClickHouseCluster(__file__), "predefined_handler", "test_predefined_handler"
        )
    ) as cluster:
        assert (
            404
            == cluster.instance.http_request(
                "?max_threads=1", method="GET", headers={"XXX": "xxx"}
            ).status_code
        )

        assert (
            404
            == cluster.instance.http_request(
                "test_predefined_handler_get?max_threads=1",
                method="GET",
                headers={"XXX": "bad"},
            ).status_code
        )

        assert (
            404
            == cluster.instance.http_request(
                "test_predefined_handler_get?max_threads=1",
                method="POST",
                headers={"XXX": "xxx"},
            ).status_code
        )

        assert (
            500
            == cluster.instance.http_request(
                "test_predefined_handler_get?max_threads=1",
                method="GET",
                headers={"XXX": "xxx"},
            ).status_code
        )

        res1 = cluster.instance.http_request(
            "test_predefined_handler_get?max_threads=1&setting_name=max_threads",
            method="GET",
            headers={"XXX": "xxx"},
        )
        assert b"max_threads\t1\n" == res1.content
        assert (
            "text/tab-separated-values; charset=UTF-8" == res1.headers["content-type"]
        )

        res2 = cluster.instance.http_request(
            "query_param_with_url/max_threads?max_threads=1&max_final_threads=1",
            headers={"XXX": "max_final_threads"},
        )
        assert b"max_final_threads\t1\nmax_threads\t1\n" == res2.content
        assert "application/generic+one" == res2.headers["content-type"]
        assert "it works" == res2.headers["X-Test-Http-Response-Headers-Works"]
        assert (
            "also works" == res2.headers["X-Test-Http-Response-Headers-Even-Multiple"]
        )

        cluster.instance.query(
            "CREATE TABLE test_table (id UInt32, data String) Engine=TinyLog"
        )
        res3 = cluster.instance.http_request(
            "test_predefined_handler_post_body?id=100",
            method="POST",
            data="TEST".encode("utf8"),
        )
        assert res3.status_code == 200
        assert cluster.instance.query("SELECT * FROM test_table") == "100\tTEST\n"
        cluster.instance.query("DROP TABLE test_table")

        res4 = cluster.instance.http_request(
            "test_predefined_handler_get?max_threads=1&param_setting_name=max_threads",
            method="GET",
            headers={"XXX": "xxx"},
        )
        assert b"max_threads\t1\n" == res1.content


def test_fixed_static_handler():
    with contextlib.closing(
        SimpleCluster(
            ClickHouseCluster(__file__), "static_handler", "test_static_handler"
        )
    ) as cluster:
        assert (
            404
            == cluster.instance.http_request(
                "", method="GET", headers={"XXX": "xxx"}
            ).status_code
        )

        assert (
            404
            == cluster.instance.http_request(
                "test_get_fixed_static_handler", method="GET", headers={"XXX": "bad"}
            ).status_code
        )

        assert (
            404
            == cluster.instance.http_request(
                "test_get_fixed_static_handler", method="POST", headers={"XXX": "xxx"}
            ).status_code
        )

        assert (
            402
            == cluster.instance.http_request(
                "test_get_fixed_static_handler", method="GET", headers={"XXX": "xxx"}
            ).status_code
        )
        assert (
            "text/html; charset=UTF-8"
            == cluster.instance.http_request(
                "test_get_fixed_static_handler", method="GET", headers={"XXX": "xxx"}
            ).headers["Content-Type"]
        )
        assert (
            b"Test get static handler and fix content"
            == cluster.instance.http_request(
                "test_get_fixed_static_handler", method="GET", headers={"XXX": "xxx"}
            ).content
        )
        assert (
            "it works"
            == cluster.instance.http_request(
                "test_get_fixed_static_handler", method="GET", headers={"XXX": "xxx"}
            ).headers["X-Test-Http-Response-Headers-Works"]
        )
        assert (
            "also works"
            == cluster.instance.http_request(
                "test_get_fixed_static_handler", method="GET", headers={"XXX": "xxx"}
            ).headers["X-Test-Http-Response-Headers-Even-Multiple"]
        )


def test_config_static_handler():
    with contextlib.closing(
        SimpleCluster(
            ClickHouseCluster(__file__), "static_handler", "test_static_handler"
        )
    ) as cluster:
        assert (
            404
            == cluster.instance.http_request(
                "", method="GET", headers={"XXX": "xxx"}
            ).status_code
        )

        assert (
            404
            == cluster.instance.http_request(
                "test_get_config_static_handler", method="GET", headers={"XXX": "bad"}
            ).status_code
        )

        assert (
            404
            == cluster.instance.http_request(
                "test_get_config_static_handler", method="POST", headers={"XXX": "xxx"}
            ).status_code
        )

        # check default status code
        assert (
            200
            == cluster.instance.http_request(
                "test_get_config_static_handler", method="GET", headers={"XXX": "xxx"}
            ).status_code
        )
        assert (
            "text/plain; charset=UTF-8"
            == cluster.instance.http_request(
                "test_get_config_static_handler", method="GET", headers={"XXX": "xxx"}
            ).headers["Content-Type"]
        )
        assert (
            b"Test get static handler and config content"
            == cluster.instance.http_request(
                "test_get_config_static_handler", method="GET", headers={"XXX": "xxx"}
            ).content
        )


def test_absolute_path_static_handler():
    with contextlib.closing(
        SimpleCluster(
            ClickHouseCluster(__file__), "static_handler", "test_static_handler"
        )
    ) as cluster:
        cluster.instance.exec_in_container(
            [
                "bash",
                "-c",
                'echo "<html><body>Absolute Path File</body></html>" > /var/lib/clickhouse/user_files/absolute_path_file.html',
            ],
            privileged=True,
            user="root",
        )

        assert (
            404
            == cluster.instance.http_request(
                "", method="GET", headers={"XXX": "xxx"}
            ).status_code
        )

        assert (
            404
            == cluster.instance.http_request(
                "test_get_absolute_path_static_handler",
                method="GET",
                headers={"XXX": "bad"},
            ).status_code
        )

        assert (
            404
            == cluster.instance.http_request(
                "test_get_absolute_path_static_handler",
                method="POST",
                headers={"XXX": "xxx"},
            ).status_code
        )

        # check default status code
        assert (
            200
            == cluster.instance.http_request(
                "test_get_absolute_path_static_handler",
                method="GET",
                headers={"XXX": "xxx"},
            ).status_code
        )
        assert (
            "text/html; charset=UTF-8"
            == cluster.instance.http_request(
                "test_get_absolute_path_static_handler",
                method="GET",
                headers={"XXX": "xxx"},
            ).headers["Content-Type"]
        )
        assert (
            b"<html><body>Absolute Path File</body></html>\n"
            == cluster.instance.http_request(
                "test_get_absolute_path_static_handler",
                method="GET",
                headers={"XXX": "xxx"},
            ).content
        )


def test_relative_path_static_handler():
    with contextlib.closing(
        SimpleCluster(
            ClickHouseCluster(__file__), "static_handler", "test_static_handler"
        )
    ) as cluster:
        cluster.instance.exec_in_container(
            [
                "bash",
                "-c",
                'echo "<html><body>Relative Path File</body></html>" > /var/lib/clickhouse/user_files/relative_path_file.html',
            ],
            privileged=True,
            user="root",
        )

        assert (
            404
            == cluster.instance.http_request(
                "", method="GET", headers={"XXX": "xxx"}
            ).status_code
        )

        assert (
            404
            == cluster.instance.http_request(
                "test_get_relative_path_static_handler",
                method="GET",
                headers={"XXX": "bad"},
            ).status_code
        )

        assert (
            404
            == cluster.instance.http_request(
                "test_get_relative_path_static_handler",
                method="POST",
                headers={"XXX": "xxx"},
            ).status_code
        )

        # check default status code
        assert (
            200
            == cluster.instance.http_request(
                "test_get_relative_path_static_handler",
                method="GET",
                headers={"XXX": "xxx"},
            ).status_code
        )
        assert (
            "text/html; charset=UTF-8"
            == cluster.instance.http_request(
                "test_get_relative_path_static_handler",
                method="GET",
                headers={"XXX": "xxx"},
            ).headers["Content-Type"]
        )
        assert (
            b"<html><body>Relative Path File</body></html>\n"
            == cluster.instance.http_request(
                "test_get_relative_path_static_handler",
                method="GET",
                headers={"XXX": "xxx"},
            ).content
        )


def test_defaults_http_handlers():
    with contextlib.closing(
        SimpleCluster(
            ClickHouseCluster(__file__), "defaults_handlers", "test_defaults_handlers"
        )
    ) as cluster:
        assert 200 == cluster.instance.http_request("", method="GET").status_code
        assert (
            b"Default server response"
            == cluster.instance.http_request("", method="GET").content
        )

        assert 200 == cluster.instance.http_request("ping", method="GET").status_code
        assert b"Ok.\n" == cluster.instance.http_request("ping", method="GET").content

        assert (
            200
            == cluster.instance.http_request(
                "replicas_status", method="get"
            ).status_code
        )
        assert (
            b"Ok.\n"
            == cluster.instance.http_request("replicas_status", method="get").content
        )

        assert (
            200
            == cluster.instance.http_request(
                "replicas_status?verbose=1", method="get"
            ).status_code
        )
        assert (
            b""
            == cluster.instance.http_request(
                "replicas_status?verbose=1", method="get"
            ).content
        )

        assert (
            200
            == cluster.instance.http_request(
                "?query=SELECT+1", method="GET"
            ).status_code
        )
        assert (
            b"1\n"
            == cluster.instance.http_request("?query=SELECT+1", method="GET").content
        )

        assert (
            404
            == cluster.instance.http_request(
                "/nonexistent?query=SELECT+1", method="GET"
            ).status_code
        )


def test_defaults_http_handlers_config_order():
    def check_predefined_query_handler():
        assert (
            200
            == cluster.instance.http_request(
                "?query=SELECT+1", method="GET"
            ).status_code
        )
        assert (
            b"1\n"
            == cluster.instance.http_request("?query=SELECT+1", method="GET").content
        )
        response = cluster.instance.http_request(
            "test_predefined_handler_get?max_threads=1&setting_name=max_threads",
            method="GET",
            headers={"XXX": "xxx"},
        )
        assert b"max_threads\t1\n" == response.content
        assert (
            "text/tab-separated-values; charset=UTF-8"
            == response.headers["content-type"]
        )

    with contextlib.closing(
        SimpleCluster(
            ClickHouseCluster(__file__),
            "defaults_handlers_config_order_first",
            "test_defaults_handlers_config_order/defaults_first",
        )
    ) as cluster:
        check_predefined_query_handler()

    with contextlib.closing(
        SimpleCluster(
            ClickHouseCluster(__file__),
            "defaults_handlers_config_order_first",
            "test_defaults_handlers_config_order/defaults_last",
        )
    ) as cluster:
        check_predefined_query_handler()


def test_prometheus_handler():
    with contextlib.closing(
        SimpleCluster(
            ClickHouseCluster(__file__), "prometheus_handler", "test_prometheus_handler"
        )
    ) as cluster:
        assert (
            404
            == cluster.instance.http_request(
                "", method="GET", headers={"XXX": "xxx"}
            ).status_code
        )

        assert (
            404
            == cluster.instance.http_request(
                "test_prometheus", method="GET", headers={"XXX": "bad"}
            ).status_code
        )

        assert (
            404
            == cluster.instance.http_request(
                "test_prometheus", method="POST", headers={"XXX": "xxx"}
            ).status_code
        )

        assert (
            200
            == cluster.instance.http_request(
                "test_prometheus", method="GET", headers={"XXX": "xxx"}
            ).status_code
        )
        assert (
            b"ClickHouseProfileEvents_Query"
            in cluster.instance.http_request(
                "test_prometheus", method="GET", headers={"XXX": "xxx"}
            ).content
        )


def test_replicas_status_handler():
    with contextlib.closing(
        SimpleCluster(
            ClickHouseCluster(__file__),
            "replicas_status_handler",
            "test_replicas_status_handler",
        )
    ) as cluster:
        assert (
            404
            == cluster.instance.http_request(
                "", method="GET", headers={"XXX": "xxx"}
            ).status_code
        )

        assert (
            404
            == cluster.instance.http_request(
                "test_replicas_status", method="GET", headers={"XXX": "bad"}
            ).status_code
        )

        assert (
            404
            == cluster.instance.http_request(
                "test_replicas_status", method="POST", headers={"XXX": "xxx"}
            ).status_code
        )

        assert (
            200
            == cluster.instance.http_request(
                "test_replicas_status", method="GET", headers={"XXX": "xxx"}
            ).status_code
        )
        assert (
            b"Ok.\n"
            == cluster.instance.http_request(
                "test_replicas_status", method="GET", headers={"XXX": "xxx"}
            ).content
        )