import logging
import os
import random
import re
import time
from time import sleep

import allure
import pytest
from frostfs_testlib.resources.common import MORPH_BLOCK_TIME
from frostfs_testlib.resources.wellknown_acl import PUBLIC_ACL
from frostfs_testlib.s3 import AwsCliClient
from frostfs_testlib.s3.interfaces import S3ClientWrapper, VersioningStatus
from frostfs_testlib.steps.cli.container import (
    create_container,
    list_objects,
    search_nodes_with_container,
)
from frostfs_testlib.steps.cli.object import get_object, get_object_nodes, put_object_to_random_node
from frostfs_testlib.steps.s3.s3_helper import set_bucket_versioning
from frostfs_testlib.storage.cluster import Cluster, ClusterNode
from frostfs_testlib.storage.controllers import ClusterStateController
from frostfs_testlib.storage.dataclasses.object_size import ObjectSize
from frostfs_testlib.testing.cluster_test_base import ClusterTestBase
from frostfs_testlib.utils import datetime_utils
from frostfs_testlib.utils.failover_utils import (
    wait_all_storage_nodes_returned,
    wait_object_replication,
)
from frostfs_testlib.utils.file_utils import generate_file, get_file_hash

logger = logging.getLogger("NeoLogger")
STORAGE_NODE_COMMUNICATION_PORT = "8080"
STORAGE_NODE_COMMUNICATION_PORT_TLS = "8082"
PORTS_TO_BLOCK = [STORAGE_NODE_COMMUNICATION_PORT, STORAGE_NODE_COMMUNICATION_PORT_TLS]
blocked_nodes: list[ClusterNode] = []


def pytest_generate_tests(metafunc):
    if "s3_client" in metafunc.fixturenames:
        metafunc.parametrize(
            "s3_client, auth_container_placement_policy",
            [
                (
                    AwsCliClient,
                    "REP $ALPHABET_NODE_COUNT$ SELECT 4 FROM ALPHA FILTER 'role' EQ 'alphabet' AS ALPHA",
                )
            ],
            ids=["aws"],
            indirect=True,
        )


@pytest.mark.failover
@pytest.mark.failover_network
class TestFailoverNetwork(ClusterTestBase):
    @pytest.fixture(autouse=True)
    @allure.title("Restore network")
    def restore_network(self, cluster_state_controller: ClusterStateController):
        yield
        with allure.step(f"Count blocked nodes {len(blocked_nodes)}"):
            not_empty = len(blocked_nodes) != 0
        for node in list(blocked_nodes):
            with allure.step(f"Restore network for {node}"):
                cluster_state_controller.restore_traffic(mode="ports", node=node)
            blocked_nodes.remove(node)
        if not_empty:
            wait_all_storage_nodes_returned(self.shell, self.cluster)

    @allure.title("Block Storage node traffic")
    def test_block_storage_node_traffic(
        self,
        default_wallet: str,
        require_multiple_hosts,
        simple_object_size: ObjectSize,
        cluster_state_controller: ClusterStateController,
    ):
        """
        Block storage nodes traffic using iptables and wait for replication for objects.
        """
        wallet = default_wallet
        placement_rule = "REP 2 IN X CBF 2 SELECT 2 FROM * AS X"
        wakeup_node_timeout = 10  # timeout to let nodes detect that traffic has blocked
        nodes_to_block_count = 2

        source_file_path = generate_file(simple_object_size.value)
        cid = create_container(
            wallet,
            shell=self.shell,
            endpoint=self.cluster.default_rpc_endpoint,
            rule=placement_rule,
            basic_acl=PUBLIC_ACL,
        )
        oid = put_object_to_random_node(
            wallet, source_file_path, cid, shell=self.shell, cluster=self.cluster
        )

        nodes = wait_object_replication(
            cid, oid, 2, shell=self.shell, nodes=self.cluster.storage_nodes
        )

        logger.info(f"Nodes are {nodes}")
        nodes_to_block = nodes
        if nodes_to_block_count > len(nodes):
            # TODO: the intent of this logic is not clear, need to revisit
            nodes_to_block = random.choices(nodes, k=2)

        excluded_nodes = []
        for node in nodes_to_block:
            with allure.step(f"Block incoming traffic at node {node} on port {PORTS_TO_BLOCK}"):
                block_node = [
                    cluster_node
                    for cluster_node in self.cluster.cluster_nodes
                    if cluster_node.storage_node == node
                ]
                blocked_nodes.append(*block_node)
                excluded_nodes.append(node)
                cluster_state_controller.drop_traffic(
                    mode="ports",
                    node=node,
                    wakeup_timeout=wakeup_node_timeout,
                    ports=PORTS_TO_BLOCK,
                )

            with allure.step(f"Check object is not stored on node {node}"):
                new_nodes = wait_object_replication(
                    cid,
                    oid,
                    2,
                    shell=self.shell,
                    nodes=list(set(self.cluster.storage_nodes) - set(excluded_nodes)),
                )
                assert node not in new_nodes

            with allure.step("Check object data is not corrupted"):
                got_file_path = get_object(
                    wallet, cid, oid, endpoint=new_nodes[0].get_rpc_endpoint(), shell=self.shell
                )
                assert get_file_hash(source_file_path) == get_file_hash(got_file_path)

        for node in nodes_to_block:
            with allure.step(f"Unblock incoming traffic at host {node} on port {PORTS_TO_BLOCK}"):
                cluster_state_controller.restore_traffic(mode="ports", node=node)
                block_node = [
                    cluster_node
                    for cluster_node in self.cluster.cluster_nodes
                    if cluster_node.storage_node == node
                ]
                blocked_nodes.remove(*block_node)
                sleep(wakeup_node_timeout)

        with allure.step("Check object data is not corrupted"):
            new_nodes = wait_object_replication(
                cid, oid, 2, shell=self.shell, nodes=self.cluster.storage_nodes
            )

            got_file_path = get_object(
                wallet, cid, oid, shell=self.shell, endpoint=new_nodes[0].get_rpc_endpoint()
            )
            assert get_file_hash(source_file_path) == get_file_hash(got_file_path)


@pytest.mark.failover
@pytest.mark.failover_split_brain
class TestFailoverSplitBrain(ClusterTestBase):
    @pytest.fixture(autouse=True)
    def restore_traffic_system(self, cluster_state_controller: ClusterStateController) -> None:
        yield
        cluster_state_controller.restore_all_traffic()

    def search_container_bucket(self, bucket):
        output = self.shell.exec(
            f"curl -k --head https://{self.cluster.default_rpc_endpoint.split(':')[0]}/{bucket}"
        ).stdout.strip()
        pattern = r"x-container-id: (.*)"
        matches = re.findall(pattern, output)
        if matches:
            return matches[0]
        else:
            return logger.info(f"Key {pattern} no search")

    def split_nodes(self, nodes_list: list[ClusterNode]) -> tuple[list[ClusterNode], ...]:
        count = len(nodes_list)
        splitted = []
        free_nodes = list(set(self.cluster.cluster_nodes) - set(nodes_list))
        for i in range(count):
            splitted.append(nodes_list[i::count] + free_nodes[i::count])
        return tuple(s for s in splitted)

    @allure.title(
        "Replication tree after split brain, versioning bucket (placement_policy={auth_container_placement_policy}, s3_client={s3_client})",
    )
    def test_versioning_bucket_after_split_brain(
        self,
        cluster_state_controller: ClusterStateController,
        bucket: str,
        s3_client: S3ClientWrapper,
        default_wallet,
        simple_object_size: ObjectSize,
    ):
        object_version = []

        with allure.step(f"Search ID container for bucket - {bucket}"):
            bucket_cid = self.search_container_bucket(bucket)

        with allure.step(f"Check, container - {bucket_cid}, which is located on 4 nodes"):
            container_nodes = search_nodes_with_container(
                wallet=default_wallet,
                cid=bucket_cid,
                shell=self.shell,
                endpoint=self.cluster.default_rpc_endpoint,
                cluster=self.cluster,
            )

            assert len(container_nodes) == 4, f"Expected 4 nodes, actually - {len(container_nodes)}"

        with allure.step(f"Enable versioning in a bucket - {bucket}"):
            set_bucket_versioning(
                s3_client=s3_client, bucket=bucket, status=VersioningStatus.ENABLED
            )

        with allure.step("Check that versioning is enabled in the bucket"):
            assert s3_client.get_bucket_versioning_status(bucket) == "Enabled"

        with allure.step(f"Put an object in a bucket - {bucket}"):
            file_one = generate_file(simple_object_size.value)
            object_version.append(
                s3_client.put_object(
                    bucket=bucket,
                    filepath=file_one,
                )
            )
            os.remove(file_one)

        with allure.step("Check that the object is placed in the bucket and it is alone there"):
            list_objects_versions = s3_client.list_objects_versions(bucket=bucket)
            assert (
                len(list_objects_versions) == 1
            ), f"Expected 1, actual {len(list_objects_versions)}"

        with allure.step("Find the ID of the placed object"):
            oid = list_objects(
                wallet=default_wallet,
                shell=self.shell,
                container_id=bucket_cid,
                endpoint=self.cluster.default_rpc_endpoint,
            )

        with allure.step(f"Find the nodes on which the object lies - {oid}"):
            objects_nodes = get_object_nodes(
                cluster=self.cluster,
                wallet=default_wallet,
                cid=bucket_cid,
                oid=oid[0],
                shell=self.shell,
                endpoint=self.cluster.default_rpc_endpoint,
            )

        with allure.step("Split cluster"):
            segment_one, segment_two = self.split_nodes(objects_nodes)

        with allure.step(f"Enable splitting on nodes - {segment_one}"):
            for node in segment_one:
                cluster_state_controller.drop_traffic(
                    mode="nodes", node=node, wakeup_timeout=60, block_nodes=segment_two
                )
                with allure.step(f"Checking ping from {node} to {segment_two}, expected False"):
                    assert (
                        cluster_state_controller.ping_traffic(node, segment_two, 1) is True
                    ), "Expected True"
            for node in segment_two:
                with allure.step(f"Checking ping from {node} to {segment_two}, expected False"):
                    assert (
                        cluster_state_controller.ping_traffic(node, segment_one, 1) is True
                    ), "Expected True"

        with allure.step("Put the 2nd version of the same object on both halves of the cluster"):
            for node in objects_nodes:
                file = generate_file(simple_object_size.value)
                with allure.step(f"Change s3 endpoint to - {node.s3_gate.get_endpoint()}"):
                    s3_client.set_endpoint(node.s3_gate.get_endpoint())
                with allure.step(f"Put object in bucket - {bucket}"):
                    object_version.append(
                        s3_client.put_object(
                            bucket=bucket,
                            filepath=file,
                        )
                    )
                os.remove(file)
                time.sleep(datetime_utils.parse_time(MORPH_BLOCK_TIME))
            with allure.step(
                f"Change s3 endpoint to default - {self.cluster.default_s3_gate_endpoint}"
            ):
                s3_client.set_endpoint(self.cluster.default_s3_gate_endpoint)

        with allure.step("Turn off split"):
            for node in segment_one:
                with allure.step(f"Turn off to split - {node}"):
                    cluster_state_controller.restore_traffic(mode="nodes", node=node)
                with allure.step(f"Checking ping from {node} to {segment_two}, expected True"):
                    assert cluster_state_controller.ping_traffic(
                        node, segment_two, 0
                    ), "Expected True"
            for node in segment_two:
                with allure.step(f"Checking ping from {node} to {segment_one}, expected True"):
                    assert cluster_state_controller.ping_traffic(
                        node, segment_one, 0
                    ), "Expected True"

        with allure.step("Tick 1 epoch and wait 2 block"):
            self.tick_epochs(1, self.cluster.storage_nodes[0])
            time.sleep(datetime_utils.parse_time(MORPH_BLOCK_TIME) * 2)

        with allure.step(
            "Check that the nodes of both halves of the cluster contain all 3 downloaded versions"
        ):
            bucket_versions = s3_client.list_objects_versions(bucket=bucket)
            bucket_versions = sorted(bucket_versions, key=lambda x: x["LastModified"])
            assert len(bucket_versions) == 3, f"Expected 3, actually {len(bucket_versions)}"

        with allure.step("Check that the latest version is the one that was uploaded last in time"):
            assert object_version[-1] == bucket_versions[-1]["VersionId"], (
                f"{object_version[-1]} " f"!= {bucket_versions[-1]['VersionId']}"
            )

    @allure.title(
        "Replication tree after split brain, no version bucket (placement_policy={auth_container_placement_policy}, s3_client={s3_client})"
    )
    def test_no_version_bucket_after_split_brain(
        self,
        cluster_state_controller: ClusterStateController,
        bucket: str,
        s3_client: S3ClientWrapper,
        default_wallet,
        simple_object_size: ObjectSize,
    ):
        with allure.step(f"Search ID container for bucket - {bucket}"):
            bucket_cid = self.search_container_bucket(bucket)

        with allure.step(f"Check, container - {bucket_cid}, which is located on 4 nodes"):
            container_nodes = search_nodes_with_container(
                wallet=default_wallet,
                cid=bucket_cid,
                shell=self.shell,
                endpoint=self.cluster.default_rpc_endpoint,
                cluster=self.cluster,
            )

            assert len(container_nodes) == 4, f"Expected 4 nodes, actually - {len(container_nodes)}"

        with allure.step(f"Put an object in a bucket - {bucket}"):
            file_one = generate_file(simple_object_size.value)
            s3_client.put_object(
                bucket=bucket,
                filepath=file_one,
            )
            os.remove(file_one)

        with allure.step("Check that the object is placed in the bucket and it is alone there"):
            list_objects_versions = s3_client.list_objects_versions(bucket=bucket)
            assert (
                len(list_objects_versions) == 1
            ), f"Expected 1, actual {len(list_objects_versions)}"

        with allure.step("Find the ID of the placed object"):
            oid = list_objects(
                wallet=default_wallet,
                shell=self.shell,
                container_id=bucket_cid,
                endpoint=self.cluster.default_rpc_endpoint,
            )

        with allure.step(f"Find the nodes on which the object lies - {oid}"):
            objects_nodes = get_object_nodes(
                cluster=self.cluster,
                wallet=default_wallet,
                cid=bucket_cid,
                oid=oid[0],
                shell=self.shell,
                endpoint=self.cluster.default_rpc_endpoint,
            )

        with allure.step("Split cluster"):
            segment_one, segment_two = self.split_nodes(objects_nodes)

        with allure.step(f"Enable splitting on nodes - {segment_one}"):
            for node in segment_one:
                cluster_state_controller.drop_traffic(
                    mode="nodes", node=node, wakeup_timeout=60, block_nodes=segment_two
                )
                with allure.step(f"Checking ping from {node} to {segment_two}, expected False"):
                    assert cluster_state_controller.ping_traffic(
                        node, segment_two, 1
                    ), "Expected False"
            for node in segment_two:
                with allure.step(f"Checking ping from {node} to {segment_two}, expected False"):
                    assert cluster_state_controller.ping_traffic(
                        node, segment_one, 1
                    ), "Expected False"

        with allure.step("Put the 2nd version of the same object on both halves of the cluster"):
            for node in objects_nodes:
                file = generate_file(simple_object_size.value)
                with allure.step(f"Change s3 endpoint to - {node.s3_gate.get_endpoint()}"):
                    s3_client.set_endpoint(node.s3_gate.get_endpoint())
                with allure.step(f"Put object in bucket - {bucket}"):
                    s3_client.put_object(
                        bucket=bucket,
                        filepath=file,
                    )
                os.remove(file)
                time.sleep(datetime_utils.parse_time(MORPH_BLOCK_TIME))
            with allure.step(
                f"Change s3 endpoint to default - {self.cluster.default_s3_gate_endpoint}"
            ):
                s3_client.set_endpoint(self.cluster.default_s3_gate_endpoint)

        with allure.step("Turn off split"):
            for node in segment_one:
                with allure.step(f"Turn off to split - {node}"):
                    cluster_state_controller.restore_traffic(mode="nodes", node=node)
                with allure.step(f"Checking ping from {node} to {segment_two}, expected True"):
                    assert cluster_state_controller.ping_traffic(
                        node, segment_two, 0
                    ), "Expected True"
            for node in segment_two:
                with allure.step(f"Checking ping from {node} to {segment_one}, expected True"):
                    assert cluster_state_controller.ping_traffic(
                        node, segment_one, 0
                    ), "Expected True"

        with allure.step("Tick 1 epoch and wait 2 block"):
            self.tick_epochs(1, self.cluster.storage_nodes[0])
            time.sleep(datetime_utils.parse_time(MORPH_BLOCK_TIME) * 2)

        with allure.step(
            "Check that the nodes of both halves of the cluster contain all 3 downloaded versions"
        ):
            objects_bucket = s3_client.list_objects_versions(bucket=bucket)
            assert len(objects_bucket) == 3, f"Expected 3, actually {len(objects_bucket)}"