import os
import sys
import time
import logging
import pytest

from helpers.cluster import ClickHouseCluster
from helpers.test_tools import TSV

import docker

CURRENT_TEST_DIR = os.path.dirname(os.path.abspath(__file__))
sys.path.insert(0, os.path.dirname(CURRENT_TEST_DIR))

cluster = ClickHouseCluster(__file__)


@pytest.fixture(scope="module")
def started_cluster():
    global cluster
    try:

        for name in ["first_of_two", "second_of_two"]:
            instance = cluster.add_instance(
                name,
                main_configs=[
                    "configs_two_nodes/conf.d/clusters.xml",
                    "configs_two_nodes/conf.d/ddl.xml",
                    "configs_two_nodes/conf.d/storage_configuration.xml",
                ],
                user_configs=["configs_two_nodes/users.xml"],
                with_zookeeper=True,
            )

        cluster.start()

        for name in ["first_of_two", "second_of_two"]:
            instance = cluster.instances[name]
            instance.exec_in_container(["bash", "-c", "mkdir /jbod1"])
            instance.exec_in_container(["bash", "-c", "mkdir /jbod2"])
            instance.exec_in_container(["bash", "-c", "mkdir /external"])

        yield cluster

    finally:
        cluster.shutdown()


# Will copy table from `first` node to `second`
class TaskWithDifferentSchema:
    def __init__(self, cluster):
        self.cluster = cluster
        self.zk_task_path = "/clickhouse-copier/task_with_different_schema"
        self.container_task_file = "/task_with_different_schema.xml"

        for instance_name, _ in cluster.instances.items():
            instance = cluster.instances[instance_name]
            instance.copy_file_to_container(
                os.path.join(CURRENT_TEST_DIR, "./task_with_different_schema.xml"),
                self.container_task_file,
            )
            print(
                "Copied task file to container of '{}' instance. Path {}".format(
                    instance_name, self.container_task_file
                )
            )

    def start(self):
        first = cluster.instances["first_of_two"]
        second = cluster.instances["second_of_two"]

        first.query("DROP DATABASE IF EXISTS db_different_schema SYNC")
        second.query("DROP DATABASE IF EXISTS db_different_schema SYNC")

        first.query("CREATE DATABASE IF NOT EXISTS db_different_schema;")
        first.query(
            """CREATE TABLE db_different_schema.source
        (
            Column1 String,
            Column2 UInt32,
            Column3 Date,
            Column4 DateTime,
            Column5 UInt16,
            Column6 String,
            Column7 String,
            Column8 String,
            Column9 String,
            Column10 String,
            Column11 String,
            Column12 Decimal(3, 1),
            Column13 DateTime,
            Column14 UInt16
        )
        ENGINE = MergeTree()
        PARTITION BY (toYYYYMMDD(Column3), Column3)
        PRIMARY KEY (Column1, Column2, Column3, Column4, Column6, Column7, Column8, Column9)
        ORDER BY (Column1, Column2, Column3, Column4, Column6, Column7, Column8, Column9)
        SETTINGS index_granularity = 8192"""
        )

        first.query(
            """INSERT INTO db_different_schema.source SELECT * FROM generateRandom(
            'Column1 String, Column2 UInt32, Column3 Date, Column4 DateTime, Column5 UInt16,
            Column6 String, Column7 String, Column8 String, Column9 String, Column10 String,
            Column11 String, Column12 Decimal(3, 1), Column13 DateTime, Column14 UInt16', 1, 10, 2) LIMIT 50;"""
        )

        second.query("CREATE DATABASE IF NOT EXISTS db_different_schema;")
        second.query(
            """CREATE TABLE db_different_schema.destination
        (
            Column1 LowCardinality(String) CODEC(LZ4),
            Column2 UInt32 CODEC(LZ4),
            Column3 Date CODEC(DoubleDelta, LZ4),
            Column4 DateTime CODEC(DoubleDelta, LZ4),
            Column5 UInt16 CODEC(LZ4),
            Column6 LowCardinality(String) CODEC(ZSTD),
            Column7 LowCardinality(String) CODEC(ZSTD),
            Column8 LowCardinality(String) CODEC(ZSTD),
            Column9 LowCardinality(String) CODEC(ZSTD),
            Column10 String CODEC(ZSTD(6)),
            Column11 LowCardinality(String) CODEC(LZ4),
            Column12 Decimal(3,1) CODEC(LZ4),
            Column13 DateTime CODEC(DoubleDelta, LZ4),
            Column14 UInt16 CODEC(LZ4)
        ) ENGINE = MergeTree()
        PARTITION BY toYYYYMMDD(Column3)
        ORDER BY (Column9, Column1, Column2, Column3, Column4);"""
        )

        print("Preparation completed")

    def check(self):
        first = cluster.instances["first_of_two"]
        second = cluster.instances["second_of_two"]

        a = first.query("SELECT count() from db_different_schema.source")
        b = second.query("SELECT count() from db_different_schema.destination")
        assert a == b, "Count"

        a = TSV(
            first.query(
                """SELECT sipHash64(*) from db_different_schema.source
            ORDER BY (Column1, Column2, Column3, Column4, Column5, Column6, Column7, Column8, Column9, Column10, Column11, Column12, Column13, Column14)"""
            )
        )
        b = TSV(
            second.query(
                """SELECT sipHash64(*) from db_different_schema.destination
            ORDER BY (Column1, Column2, Column3, Column4, Column5, Column6, Column7, Column8, Column9, Column10, Column11, Column12, Column13, Column14)"""
            )
        )
        assert a == b, "Data"

        first.query("DROP DATABASE IF EXISTS db_different_schema SYNC")
        second.query("DROP DATABASE IF EXISTS db_different_schema SYNC")


# Just simple copying, but table schema has TTL on columns
# Also table will have slightly different schema
class TaskTTL:
    def __init__(self, cluster):
        self.cluster = cluster
        self.zk_task_path = "/clickhouse-copier/task_ttl_columns"
        self.container_task_file = "/task_ttl_columns.xml"

        for instance_name, _ in cluster.instances.items():
            instance = cluster.instances[instance_name]
            instance.copy_file_to_container(
                os.path.join(CURRENT_TEST_DIR, "./task_ttl_columns.xml"),
                self.container_task_file,
            )
            print(
                "Copied task file to container of '{}' instance. Path {}".format(
                    instance_name, self.container_task_file
                )
            )

    def start(self):
        first = cluster.instances["first_of_two"]
        second = cluster.instances["second_of_two"]

        first.query("DROP DATABASE IF EXISTS db_ttl_columns SYNC")
        second.query("DROP DATABASE IF EXISTS db_ttl_columns SYNC")

        first.query("CREATE DATABASE IF NOT EXISTS db_ttl_columns;")
        first.query(
            """CREATE TABLE db_ttl_columns.source
        (
            Column1 String,
            Column2 UInt32,
            Column3 Date,
            Column4 DateTime,
            Column5 UInt16,
            Column6 String TTL now() + INTERVAL 1 MONTH,
            Column7 Decimal(3, 1) TTL now() + INTERVAL 1 MONTH,
            Column8 Tuple(Float64, Float64) TTL now() + INTERVAL 1 MONTH
        )
        ENGINE = MergeTree()
        PARTITION BY (toYYYYMMDD(Column3), Column3)
        PRIMARY KEY (Column1, Column2, Column3)
        ORDER BY (Column1, Column2, Column3)
        SETTINGS index_granularity = 8192"""
        )

        first.query(
            """INSERT INTO db_ttl_columns.source SELECT * FROM generateRandom(
            'Column1 String, Column2 UInt32, Column3 Date, Column4 DateTime, Column5 UInt16,
            Column6 String, Column7 Decimal(3, 1), Column8 Tuple(Float64, Float64)', 1, 10, 2) LIMIT 50;"""
        )

        second.query("CREATE DATABASE IF NOT EXISTS db_ttl_columns;")
        second.query(
            """CREATE TABLE db_ttl_columns.destination
        (
            Column1 String,
            Column2 UInt32,
            Column3 Date,
            Column4 DateTime TTL now() + INTERVAL 1 MONTH,
            Column5 UInt16 TTL now() + INTERVAL 1 MONTH,
            Column6 String TTL now() + INTERVAL 1 MONTH,
            Column7 Decimal(3, 1) TTL now() + INTERVAL 1 MONTH,
            Column8 Tuple(Float64, Float64)
        ) ENGINE = MergeTree()
        PARTITION BY toYYYYMMDD(Column3)
        ORDER BY (Column3, Column2, Column1);"""
        )

        print("Preparation completed")

    def check(self):
        first = cluster.instances["first_of_two"]
        second = cluster.instances["second_of_two"]

        a = first.query("SELECT count() from db_ttl_columns.source")
        b = second.query("SELECT count() from db_ttl_columns.destination")
        assert a == b, "Count"

        a = TSV(
            first.query(
                """SELECT sipHash64(*) from db_ttl_columns.source
            ORDER BY (Column1, Column2, Column3, Column4, Column5, Column6, Column7, Column8)"""
            )
        )
        b = TSV(
            second.query(
                """SELECT sipHash64(*) from db_ttl_columns.destination
            ORDER BY (Column1, Column2, Column3, Column4, Column5, Column6, Column7, Column8)"""
            )
        )
        assert a == b, "Data"

        first.query("DROP DATABASE IF EXISTS db_ttl_columns SYNC")
        second.query("DROP DATABASE IF EXISTS db_ttl_columns SYNC")


class TaskSkipIndex:
    def __init__(self, cluster):
        self.cluster = cluster
        self.zk_task_path = "/clickhouse-copier/task_skip_index"
        self.container_task_file = "/task_skip_index.xml"

        for instance_name, _ in cluster.instances.items():
            instance = cluster.instances[instance_name]
            instance.copy_file_to_container(
                os.path.join(CURRENT_TEST_DIR, "./task_skip_index.xml"),
                self.container_task_file,
            )
            print(
                "Copied task file to container of '{}' instance. Path {}".format(
                    instance_name, self.container_task_file
                )
            )

    def start(self):
        first = cluster.instances["first_of_two"]
        second = cluster.instances["second_of_two"]

        first.query("DROP DATABASE IF EXISTS db_skip_index SYNC")
        second.query("DROP DATABASE IF EXISTS db_skip_index SYNC")

        first.query("CREATE DATABASE IF NOT EXISTS db_skip_index;")
        first.query(
            """CREATE TABLE db_skip_index.source
        (
            Column1 UInt64,
            Column2 Int32,
            Column3 Date,
            Column4 DateTime,
            Column5 String,
            INDEX a (Column1 * Column2, Column5) TYPE minmax GRANULARITY 3,
            INDEX b (Column1 * length(Column5)) TYPE set(1000) GRANULARITY 4
        )
        ENGINE = MergeTree()
        PARTITION BY (toYYYYMMDD(Column3), Column3)
        PRIMARY KEY (Column1, Column2, Column3)
        ORDER BY (Column1, Column2, Column3)
        SETTINGS index_granularity = 8192"""
        )

        first.query(
            """INSERT INTO db_skip_index.source SELECT * FROM generateRandom(
            'Column1 UInt64, Column2 Int32, Column3 Date, Column4 DateTime, Column5 String', 1, 10, 2) LIMIT 100;"""
        )

        second.query("CREATE DATABASE IF NOT EXISTS db_skip_index;")
        second.query(
            """CREATE TABLE db_skip_index.destination
        (
            Column1 UInt64,
            Column2 Int32,
            Column3 Date,
            Column4 DateTime,
            Column5 String,
            INDEX a (Column1 * Column2, Column5) TYPE minmax GRANULARITY 3,
            INDEX b (Column1 * length(Column5)) TYPE set(1000) GRANULARITY 4
        ) ENGINE = MergeTree()
        PARTITION BY toYYYYMMDD(Column3)
        ORDER BY (Column3, Column2, Column1);"""
        )

        print("Preparation completed")

    def check(self):
        first = cluster.instances["first_of_two"]
        second = cluster.instances["second_of_two"]

        a = first.query("SELECT count() from db_skip_index.source")
        b = second.query("SELECT count() from db_skip_index.destination")
        assert a == b, "Count"

        a = TSV(
            first.query(
                """SELECT sipHash64(*) from db_skip_index.source
            ORDER BY (Column1, Column2, Column3, Column4, Column5)"""
            )
        )
        b = TSV(
            second.query(
                """SELECT sipHash64(*) from db_skip_index.destination
            ORDER BY (Column1, Column2, Column3, Column4, Column5)"""
            )
        )
        assert a == b, "Data"

        first.query("DROP DATABASE IF EXISTS db_skip_index SYNC")
        second.query("DROP DATABASE IF EXISTS db_skip_index SYNC")


class TaskTTLMoveToVolume:
    def __init__(self, cluster):
        self.cluster = cluster
        self.zk_task_path = "/clickhouse-copier/task_ttl_move_to_volume"
        self.container_task_file = "/task_ttl_move_to_volume.xml"

        for instance_name, _ in cluster.instances.items():
            instance = cluster.instances[instance_name]
            instance.copy_file_to_container(
                os.path.join(CURRENT_TEST_DIR, "./task_ttl_move_to_volume.xml"),
                self.container_task_file,
            )
            print(
                "Copied task file to container of '{}' instance. Path {}".format(
                    instance_name, self.container_task_file
                )
            )

    def start(self):
        first = cluster.instances["first_of_two"]
        second = cluster.instances["first_of_two"]

        first.query("DROP DATABASE IF EXISTS db_move_to_volume SYNC")
        second.query("DROP DATABASE IF EXISTS db_move_to_volume SYNC")

        first.query("CREATE DATABASE IF NOT EXISTS db_move_to_volume;")
        first.query(
            """CREATE TABLE db_move_to_volume.source
        (
            Column1 UInt64,
            Column2 Int32,
            Column3 Date,
            Column4 DateTime,
            Column5 String
        )
        ENGINE = MergeTree()
        PARTITION BY (toYYYYMMDD(Column3), Column3)
        PRIMARY KEY (Column1, Column2, Column3)
        ORDER BY (Column1, Column2, Column3)
        TTL Column3 + INTERVAL 1 MONTH TO VOLUME 'external'
        SETTINGS storage_policy = 'external_with_jbods';"""
        )

        first.query(
            """INSERT INTO db_move_to_volume.source SELECT * FROM generateRandom(
            'Column1 UInt64, Column2 Int32, Column3 Date, Column4 DateTime, Column5 String', 1, 10, 2) LIMIT 100;"""
        )

        second.query("CREATE DATABASE IF NOT EXISTS db_move_to_volume;")
        second.query(
            """CREATE TABLE db_move_to_volume.destination
        (
            Column1 UInt64,
            Column2 Int32,
            Column3 Date,
            Column4 DateTime,
            Column5 String
        ) ENGINE = MergeTree()
        PARTITION BY toYYYYMMDD(Column3)
        ORDER BY (Column3, Column2, Column1)
        TTL Column3 + INTERVAL 1 MONTH TO VOLUME 'external'
        SETTINGS storage_policy = 'external_with_jbods';"""
        )

        print("Preparation completed")

    def check(self):
        first = cluster.instances["first_of_two"]
        second = cluster.instances["second_of_two"]

        a = first.query("SELECT count() from db_move_to_volume.source")
        b = second.query("SELECT count() from db_move_to_volume.destination")
        assert a == b, "Count"

        a = TSV(
            first.query(
                """SELECT sipHash64(*) from db_move_to_volume.source
            ORDER BY (Column1, Column2, Column3, Column4, Column5)"""
            )
        )
        b = TSV(
            second.query(
                """SELECT sipHash64(*) from db_move_to_volume.destination
            ORDER BY (Column1, Column2, Column3, Column4, Column5)"""
            )
        )
        assert a == b, "Data"

        first.query("DROP DATABASE IF EXISTS db_move_to_volume SYNC")
        second.query("DROP DATABASE IF EXISTS db_move_to_volume SYNC")


class TaskDropTargetPartition:
    def __init__(self, cluster):
        self.cluster = cluster
        self.zk_task_path = "/clickhouse-copier/task_drop_target_partition"
        self.container_task_file = "/task_drop_target_partition.xml"

        for instance_name, _ in cluster.instances.items():
            instance = cluster.instances[instance_name]
            instance.copy_file_to_container(
                os.path.join(CURRENT_TEST_DIR, "./task_drop_target_partition.xml"),
                self.container_task_file,
            )
            print(
                "Copied task file to container of '{}' instance. Path {}".format(
                    instance_name, self.container_task_file
                )
            )

    def start(self):
        first = cluster.instances["first_of_two"]
        second = cluster.instances["second_of_two"]

        first.query("DROP DATABASE IF EXISTS db_drop_target_partition SYNC")
        second.query("DROP DATABASE IF EXISTS db_drop_target_partition SYNC")

        first.query("CREATE DATABASE IF NOT EXISTS db_drop_target_partition;")
        first.query(
            """CREATE TABLE db_drop_target_partition.source
        (
            Column1 UInt64,
            Column2 Int32,
            Column3 Date,
            Column4 DateTime,
            Column5 String
        )
        ENGINE = MergeTree()
        PARTITION BY (toYYYYMMDD(Column3), Column3)
        PRIMARY KEY (Column1, Column2, Column3)
        ORDER BY (Column1, Column2, Column3);"""
        )

        first.query(
            """INSERT INTO db_drop_target_partition.source SELECT * FROM generateRandom(
            'Column1 UInt64, Column2 Int32, Column3 Date, Column4 DateTime, Column5 String', 1, 10, 2) LIMIT 100;"""
        )

        second.query("CREATE DATABASE IF NOT EXISTS db_drop_target_partition;")
        second.query(
            """CREATE TABLE db_drop_target_partition.destination
        (
            Column1 UInt64,
            Column2 Int32,
            Column3 Date,
            Column4 DateTime,
            Column5 String
        ) ENGINE = MergeTree()
        PARTITION BY toYYYYMMDD(Column3)
        ORDER BY (Column3, Column2, Column1);"""
        )

        # Insert data in target too. It has to be dropped.
        first.query(
            """INSERT INTO db_drop_target_partition.destination SELECT * FROM db_drop_target_partition.source;"""
        )

        print("Preparation completed")

    def check(self):
        first = cluster.instances["first_of_two"]
        second = cluster.instances["second_of_two"]

        a = first.query("SELECT count() from db_drop_target_partition.source")
        b = second.query("SELECT count() from db_drop_target_partition.destination")
        assert a == b, "Count"

        a = TSV(
            first.query(
                """SELECT sipHash64(*) from db_drop_target_partition.source
            ORDER BY (Column1, Column2, Column3, Column4, Column5)"""
            )
        )
        b = TSV(
            second.query(
                """SELECT sipHash64(*) from db_drop_target_partition.destination
            ORDER BY (Column1, Column2, Column3, Column4, Column5)"""
            )
        )
        assert a == b, "Data"

        first.query("DROP DATABASE IF EXISTS db_drop_target_partition SYNC")
        second.query("DROP DATABASE IF EXISTS db_drop_target_partition SYNC")


def execute_task(started_cluster, task, cmd_options):
    task.start()

    zk = started_cluster.get_kazoo_client("zoo1")
    print("Use ZooKeeper server: {}:{}".format(zk.hosts[0][0], zk.hosts[0][1]))

    # Run cluster-copier processes on each node
    docker_api = started_cluster.docker_client.api
    copiers_exec_ids = []

    cmd = [
        "/usr/bin/clickhouse",
        "copier",
        "--config",
        "/etc/clickhouse-server/config-copier.xml",
        "--task-path",
        task.zk_task_path,
        "--task-file",
        task.container_task_file,
        "--task-upload-force",
        "true",
        "--base-dir",
        "/var/log/clickhouse-server/copier",
    ]
    cmd += cmd_options

    print(cmd)

    for instance_name in started_cluster.instances.keys():
        instance = started_cluster.instances[instance_name]
        container = instance.get_docker_handle()
        instance.copy_file_to_container(
            os.path.join(CURRENT_TEST_DIR, "configs_two_nodes/config-copier.xml"),
            "/etc/clickhouse-server/config-copier.xml",
        )
        logging.info("Copied copier config to {}".format(instance.name))
        exec_id = docker_api.exec_create(container.id, cmd, stderr=True)
        output = docker_api.exec_start(exec_id).decode("utf8")
        logging.info(output)
        copiers_exec_ids.append(exec_id)
        logging.info(
            "Copier for {} ({}) has started".format(instance.name, instance.ip_address)
        )

    # time.sleep(1000)

    # Wait for copiers stopping and check their return codes
    for exec_id, instance in zip(
        copiers_exec_ids, iter(started_cluster.instances.values())
    ):
        while True:
            res = docker_api.exec_inspect(exec_id)
            if not res["Running"]:
                break
            time.sleep(1)

        assert res["ExitCode"] == 0, "Instance: {} ({}). Info: {}".format(
            instance.name, instance.ip_address, repr(res)
        )

    try:
        task.check()
    finally:
        zk.delete(task.zk_task_path, recursive=True)


# Tests
@pytest.mark.skip(reason="Too flaky :(")
def test_different_schema(started_cluster):
    execute_task(started_cluster, TaskWithDifferentSchema(started_cluster), [])


@pytest.mark.skip(reason="Too flaky :(")
def test_ttl_columns(started_cluster):
    execute_task(started_cluster, TaskTTL(started_cluster), [])


@pytest.mark.skip(reason="Too flaky :(")
def test_skip_index(started_cluster):
    execute_task(started_cluster, TaskSkipIndex(started_cluster), [])


@pytest.mark.skip(reason="Too flaky :(")
def test_ttl_move_to_volume(started_cluster):
    execute_task(started_cluster, TaskTTLMoveToVolume(started_cluster), [])