import os
import logging
from time import sleep

import allure
import pytest
from frostfs_testlib.analytics import test_case
from frostfs_testlib.hosting import Host
from frostfs_testlib.resources.common import PUBLIC_ACL
from frostfs_testlib.shell import CommandOptions
from frostfs_testlib.utils import datetime_utils
from pytest_tests.resources.common import FROSTFS_CONTRACT_CACHE_TIMEOUT, MORPH_BLOCK_TIME
from pytest_tests.helpers.cluster import Cluster, StorageNode
from pytest_tests.helpers.container import create_container
from pytest_tests.helpers.failover_utils import (
    wait_all_storage_nodes_returned,
    wait_object_replication,
)
from pytest_tests.helpers.file_helper import generate_file, get_file_hash
from pytest_tests.helpers.frostfs_verbs import get_object, put_object_to_random_node
from pytest_tests.steps.cluster_test_base import ClusterTestBase

from pytest_tests.helpers.node_management import (
    check_node_in_map,
    check_node_not_in_map,
    exclude_node_from_network_map,
    include_node_to_network_map,
    stop_random_storage_nodes,
    wait_for_node_to_be_ready,
    remove_nodes_from_map_morph
)

from pytest_tests.helpers.s3_helper import (
    check_objects_in_bucket
)
from pytest_tests.steps import s3_gate_object
from pytest_tests.steps.s3_gate_base import TestS3GateBase

from pytest_tests.helpers.aws_cli_client import AwsCliClient
from pytest_tests.helpers.file_helper import (
    generate_file,
    get_file_hash,
)

from pytest_tests.helpers.node_management import (
    check_node_in_map,
    exclude_node_from_network_map,
    include_node_to_network_map,
)

logger = logging.getLogger("NeoLogger")
stopped_nodes: list[StorageNode] = []


@allure.step("Return all stopped hosts")
@pytest.fixture(scope="function", autouse=True)
def after_run_return_all_stopped_hosts(cluster: Cluster):
    yield
    return_stopped_hosts(cluster)


def panic_reboot_host(host: Host) -> None:
    shell = host.get_shell()
    shell.exec('sudo sh -c "echo 1 > /proc/sys/kernel/sysrq"')

    options = CommandOptions(close_stdin=True, timeout=1, check=False)
    shell.exec('sudo sh -c "echo b > /proc/sysrq-trigger"', options)


def return_stopped_hosts(cluster: Cluster) -> None:
    for node in list(stopped_nodes):
        with allure.step(f"Start host {node}"):
            node.host.start_host()
        stopped_nodes.remove(node)

    wait_all_storage_nodes_returned(cluster)


@pytest.mark.failover
class TestFailoverStorage(ClusterTestBase):
    @allure.title("Lose and return storage node's host")
    @pytest.mark.parametrize("hard_reboot", [True, False])
    @pytest.mark.failover_reboot
    def test_lose_storage_node_host(
        self, default_wallet, hard_reboot: bool, require_multiple_hosts, simple_object_size
    ):
        wallet = default_wallet
        placement_rule = "REP 2 IN X CBF 2 SELECT 2 FROM * AS X"
        source_file_path = generate_file(simple_object_size)
        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
        )

        for node in nodes:
            stopped_nodes.append(node)

            with allure.step(f"Stop host {node}"):
                node.host.stop_host("hard" if hard_reboot else "soft")

            new_nodes = wait_object_replication(
                cid,
                oid,
                2,
                shell=self.shell,
                nodes=list(set(self.cluster.storage_nodes) - {node}),
            )
        assert all(old_node not in new_nodes for old_node in 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)

        with allure.step("Return all hosts"):
            return_stopped_hosts(self.cluster)

        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)

    @allure.title("Panic storage node's host")
    @pytest.mark.parametrize("sequence", [True, False])
    @pytest.mark.failover_panic
    def test_panic_storage_node_host(
        self, default_wallet, require_multiple_hosts, sequence: bool, simple_object_size
    ):
        wallet = default_wallet
        placement_rule = "REP 2 IN X CBF 2 SELECT 2 FROM * AS X"
        source_file_path = generate_file(simple_object_size)
        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
        )
        allure.attach(
            "\n".join([str(node) for node in nodes]),
            "Current nodes with object",
            allure.attachment_type.TEXT,
        )

        new_nodes: list[StorageNode] = []
        for node in nodes:
            with allure.step(f"Hard reboot host {node} via magic SysRq option"):
                panic_reboot_host(node.host)
                if sequence:
                    try:
                        new_nodes = wait_object_replication(
                            cid,
                            oid,
                            2,
                            shell=self.shell,
                            nodes=list(set(self.cluster.storage_nodes) - {node}),
                        )
                    except AssertionError:
                        new_nodes = wait_object_replication(
                            cid,
                            oid,
                            2,
                            shell=self.shell,
                            nodes=self.cluster.storage_nodes,
                        )

                    allure.attach(
                        "\n".join([str(new_node) for new_node in new_nodes]),
                        f"Nodes with object after {node} fail",
                        allure.attachment_type.TEXT,
                    )

        if not sequence:
            new_nodes = wait_object_replication(
                cid, oid, 2, shell=self.shell, nodes=self.cluster.storage_nodes
            )
            allure.attach(
                "\n".join([str(new_node) for new_node in new_nodes]),
                "Nodes with object after nodes fail",
                allure.attachment_type.TEXT,
            )

        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)


def pytest_generate_tests(metafunc):
    if "s3_client" in metafunc.fixturenames:
        metafunc.parametrize("s3_client", ["aws cli", "boto3"], indirect=True)

@pytest.mark.failover
@pytest.mark.failover_empty_map
class TestEmptyMap(TestS3GateBase):
    """
    A set of tests for makes map empty and verify that we can read objects after that
    """
    @allure.step("Teardown after EmptyMap offline test")
    @pytest.fixture()
    def empty_map_offline_teardown(self):
        yield
        with allure.step("Return all storage nodes to network map"):
            for node in list(stopped_nodes):
                include_node_to_network_map(
                    node, node, shell=self.shell, cluster=self.cluster
                )
                stopped_nodes.remove(node)

    @staticmethod
    def object_key_from_file_path(full_path: str) -> str:
        return os.path.basename(full_path)
    
    @test_case.title("Test makes network map empty (offline all storage nodes)")
    @test_case.priority(test_case.TestCasePriority.HIGH)
    @test_case.suite_name("failovers")
    @test_case.suite_section("test_failover_storage")
    @pytest.mark.failover_empty_map_offlne
    @allure.title("Test makes network map empty (offline all storage nodes)")
    def test_offline_all_storage_nodes(self, bucket, simple_object_size, empty_map_offline_teardown):
        """
        The test makes network map empty (set offline status on all storage nodes) then returns all nodes to map and checks that object can read through s3.
        
        Steps:
            1. Check that bucket is empty
            2: PUT object into bucket
            3: Check that object exists in bucket
            4: Exclude all storage nodes from network map (set status OFFLINE)
            5: Return all storage nodes to network map
            6: Check that we can read object from #2
        Args:
            bucket: bucket which contains tested object
            simple_object_size: size of object
        """
        file_path = generate_file(simple_object_size)
        file_name = self.object_key_from_file_path(file_path)
        bucket_objects = [file_name]

        objects_list = s3_gate_object.list_objects_s3(self.s3_client, bucket)
        assert not objects_list, f"Expected empty bucket, got {objects_list}"

        with allure.step("Put object into bucket"):
            s3_gate_object.put_object_s3(self.s3_client, bucket, file_path)

        with allure.step("Check that object exists in bucket"):
            check_objects_in_bucket(self.s3_client, bucket, bucket_objects)

        storage_nodes = self.cluster.storage_nodes
        with allure.step("Exclude all storage nodes from network map"):
            for node in storage_nodes:
                exclude_node_from_network_map(
                    node, node, shell=self.shell, cluster=self.cluster
                )
                stopped_nodes.append(node)

        with allure.step("Return all storage nodes to network map"):
            for node in storage_nodes:
                include_node_to_network_map(
                    node, node, shell=self.shell, cluster=self.cluster
                )
                stopped_nodes.remove(node)

        with allure.step("Check that we can read object"):
            check_objects_in_bucket(self.s3_client, bucket, bucket_objects)

        objects_list = s3_gate_object.list_objects_s3(self.s3_client, bucket)
        assert not objects_list, f"Expected empty bucket, got {objects_list}"

    @allure.step("Teardown after EmptyMap stop service test")
    @pytest.fixture()
    def empty_map_stop_service_teardown(self):
        yield
        with allure.step("Return all storage nodes to network map"):
            for node in list(list(stopped_nodes)):
                with allure.step(f"Start node {node}"):
                    node.start_service()
                with allure.step(f"Waiting status ready for node {node}"):
                    wait_for_node_to_be_ready(node)

                sleep(datetime_utils.parse_time(MORPH_BLOCK_TIME))
                self.tick_epochs(1)
                check_node_in_map(node, shell=self.shell, alive_node=node)
                stopped_nodes.remove(node)

    @test_case.title("Test makes network map empty (stop storage service on all nodes)")
    @test_case.priority(test_case.TestCasePriority.HIGH)
    @test_case.suite_name("failovers")
    @test_case.suite_section("test_failover_storage")
    @pytest.mark.failover_empty_map_stop_service
    @allure.title("Test makes network map empty (stop storage service on all nodes)")
    def test_stop_all_storage_nodes(self, bucket, simple_object_size, empty_map_stop_service_teardown):
        """
        The test makes network map empty (stop storage service on all nodes 
        then use 'frostfs-adm morph delete-nodes' to delete nodes from map) 
        then start all services and checks that object can read through s3.

        Steps:
            1. Check that bucket is empty
            2: PUT object into bucket
            3: Check that object exists in bucket
            4: Exclude all storage nodes from network map (stop storage service 
               and manual exclude from map)
            5: Return all storage nodes to network map
            6: Check that we can read object from #2
        Args:
            bucket: bucket which contains tested object
            simple_object_size: size of object
        """
        file_path = generate_file(simple_object_size)
        file_name = self.object_key_from_file_path(file_path)
        bucket_objects = [file_name]

        objects_list = s3_gate_object.list_objects_s3(self.s3_client, bucket)
        assert not objects_list, f"Expected empty bucket, got {objects_list}"

        with allure.step("Put object into bucket"):
            s3_gate_object.put_object_s3(self.s3_client, bucket, file_path)

        with allure.step("Check that object exists in bucket"):
            check_objects_in_bucket(self.s3_client, bucket, bucket_objects)

        with allure.step("Stop all storage nodes"):
            for node in self.cluster.storage_nodes:
                with allure.step(f"Stop storage service on node: {node}"):
                    node.stop_service()
                    stopped_nodes.append(node)

        with allure.step(f"Remove all nodes from network map"):
            remove_nodes_from_map_morph(shell=self.shell, cluster=self.cluster, remove_nodes=stopped_nodes)

        with allure.step("Return all storage nodes to network map"):
            self.return_nodes_after_stop_with_check_empty_map(stopped_nodes)

        with allure.step("Check that object exists in bucket"):
            check_objects_in_bucket(self.s3_client, bucket, bucket_objects)

    @allure.step("Return all nodes to cluster with check empty map first")
    def return_nodes_after_stop_with_check_empty_map(self, return_nodes = None) -> None:
        first_node = True
        for node in list(return_nodes):
            with allure.step(f"Start node {node}"):
                node.start_service()
            with allure.step(f"Waiting status ready for node {node}"):
                wait_for_node_to_be_ready(node)

            with allure.step(f"We need to make sure that network map is empty"):
                if first_node:
                    for check_node in list(return_nodes):
                        check_node_not_in_map(check_node, shell=self.shell, alive_node=node)
                    first_node = False

            sleep(datetime_utils.parse_time(MORPH_BLOCK_TIME))
            self.tick_epochs(1)
            check_node_in_map(node, shell=self.shell, alive_node=node)
            stopped_nodes.remove(node)