import logging
from dataclasses import dataclass
from time import sleep
from typing import Optional

from frostfs_testlib.hosting import Host
from frostfs_testlib.reporter import get_reporter
from frostfs_testlib.resources.common import SERVICE_MAX_STARTUP_TIME
from frostfs_testlib.shell import CommandOptions, Shell
from frostfs_testlib.steps.cli.object import neo_go_dump_keys
from frostfs_testlib.steps.node_management import storage_node_healthcheck
from frostfs_testlib.steps.storage_policy import get_nodes_with_object
from frostfs_testlib.storage.cluster import Cluster, ClusterNode, NodeBase, StorageNode
from frostfs_testlib.storage.dataclasses.frostfs_services import MorphChain
from frostfs_testlib.testing.test_control import retry, wait_for_success
from frostfs_testlib.utils.datetime_utils import parse_time

reporter = get_reporter()

logger = logging.getLogger("NeoLogger")


@reporter.step_deco("Ping node")
def ping_host(shell: Shell, host: Host):
    options = CommandOptions(check=False)
    return shell.exec(f"ping {host.config.address} -c 1", options).return_code


@reporter.step_deco("Wait for storage nodes returned to cluster")
def wait_all_storage_nodes_returned(shell: Shell, cluster: Cluster) -> None:
    for node in cluster.services(StorageNode):
        with reporter.step(f"Run health check for storage at '{node}'"):
            wait_for_host_online(shell, node)
            wait_for_node_online(node)


@retry(max_attempts=60, sleep_interval=5, expected_result=0)
@reporter.step_deco("Waiting for host of {node} to go online")
def wait_for_host_online(shell: Shell, node: StorageNode):
    try:
        # TODO: Quick solution for now, should be replaced by lib interactions
        return ping_host(shell, node.host)
    except Exception as err:
        logger.warning(f"Host ping fails with error {err}")
        return 1


@retry(max_attempts=60, sleep_interval=5, expected_result=1)
@reporter.step_deco("Waiting for host of {node} to go offline")
def wait_for_host_offline(shell: Shell, node: StorageNode):
    try:
        # TODO: Quick solution for now, should be replaced by lib interactions
        return ping_host(shell, node.host)
    except Exception as err:
        logger.warning(f"Host ping fails with error {err}")
        return 0


@retry(max_attempts=20, sleep_interval=30, expected_result=True)
@reporter.step_deco("Waiting for node {node} to go online")
def wait_for_node_online(node: StorageNode):
    try:
        health_check = storage_node_healthcheck(node)
    except Exception as err:
        logger.warning(f"Node healthcheck fails with error {err}")
        return False

    return health_check.health_status == "READY" and health_check.network_status == "ONLINE"


@reporter.step_deco("Check and return  status of given service")
def service_status(service: str, shell: Shell) -> str:
    return shell.exec(f"sudo systemctl is-active {service}").stdout.rstrip()


@dataclass
class TopCommand:
    """
    This class using `from_stdout` helps to parse result from `top command`, could return result only for one PID
    pid:          Process PID
    output:       stdout result from TOP command
    """

    pid: Optional[str] = None
    user: Optional[str] = None
    pr: Optional[str] = None
    ni: Optional[str] = None
    virt: Optional[str] = None
    res: Optional[str] = None
    shr: Optional[str] = None
    status: Optional[str] = None
    cpu_percent: Optional[str] = None
    mem_percent: Optional[str] = None
    time: Optional[str] = None
    cmd: Optional[str] = None
    STATUS_RUNNING = "R"
    STATUS_SLEEP = "S"
    STATUS_ZOMBIE = "Z"
    STATUS_UNSLEEP = "D"
    STATUS_TRACED = "T"

    @staticmethod
    def from_stdout(output: str, requested_pid: int) -> "TopCommand":
        list_var = [None for i in range(12)]
        for line in output.split("\n"):
            if str(requested_pid) in line:
                list_var = line.split()
        return TopCommand(
            pid=list_var[0],
            user=list_var[1],
            pr=list_var[2],
            ni=list_var[3],
            virt=list_var[4],
            res=list_var[5],
            shr=list_var[6],
            status=list_var[7],
            cpu_percent=list_var[8],
            mem_percent=list_var[9],
            time=list_var[10],
            cmd=list_var[11],
        )


@reporter.step_deco("Run `top` command with specified PID")
def service_status_top(service: str, shell: Shell) -> TopCommand:
    pid = service_pid(service, shell)
    output = shell.exec(f"sudo top -b -n 1 -p {pid}").stdout
    return TopCommand.from_stdout(output, pid)


@reporter.step_deco("Restart service n times with sleep")
def multiple_restart(
    service_type: type[NodeBase],
    node: ClusterNode,
    count: int = 5,
    sleep_interval: int = 2,
):
    service_systemctl_name = node.service(service_type).get_service_systemctl_name()
    service_name = node.service(service_type).name
    for _ in range(count):
        node.host.restart_service(service_name)
        logger.info(
            f"Restart {service_systemctl_name}; sleep {sleep_interval} seconds and continue"
        )
        sleep(sleep_interval)


@reporter.step_deco("Get status of list of services and check expected status")
@wait_for_success(60, 5)
def check_services_status(service_list: list[str], expected_status: str, shell: Shell):
    cmd = ""
    for service in service_list:
        cmd += f' sudo systemctl status {service} --lines=0 | grep "Active:";'
    result = shell.exec(cmd).stdout.rstrip()
    statuses = list()
    for line in result.split("\n"):
        status_substring = line.split()
        statuses.append(status_substring[1])
    unique_statuses = list(set(statuses))
    assert (
        len(unique_statuses) == 1 and expected_status in unique_statuses
    ), f"Requested status={expected_status} not found in requested services={service_list}, list of statuses={result}"


@reporter.step_deco("Wait for active status of passed service")
@wait_for_success(60, 5)
def wait_service_in_desired_state(
    service: str, shell: Shell, expected_status: Optional[str] = "active"
):
    real_status = service_status(service=service, shell=shell)
    assert (
        expected_status == real_status
    ), f"Service {service}: expected status= {expected_status}, real status {real_status}"


@reporter.step_deco("Run healthcheck against passed service")
@wait_for_success(parse_time(SERVICE_MAX_STARTUP_TIME), 1)
def service_type_healthcheck(
    service_type: type[NodeBase],
    node: ClusterNode,
):
    service = node.service(service_type)
    assert (
        service.service_healthcheck()
    ), f"Healthcheck failed for {service.get_service_systemctl_name()}, IP={node.host_ip}"


@reporter.step_deco("Kill by process name")
def kill_by_service_name(service_type: type[NodeBase], node: ClusterNode):
    service_systemctl_name = node.service(service_type).get_service_systemctl_name()
    pid = service_pid(service_systemctl_name, node.host.get_shell())
    node.host.get_shell().exec(f"sudo kill -9 {pid}")


@reporter.step_deco("Service {service} suspend")
def suspend_service(shell: Shell, service: str):
    shell.exec(f"sudo kill -STOP {service_pid(service, shell)}")


@reporter.step_deco("Service {service} resume")
def resume_service(shell: Shell, service: str):
    shell.exec(f"sudo kill -CONT {service_pid(service, shell)}")


@reporter.step_deco("Retrieve service's pid")
# retry mechanism cause when the task has been started recently '0' PID could be returned
@wait_for_success(10, 1)
def service_pid(service: str, shell: Shell) -> int:
    output = shell.exec(f"systemctl show --property MainPID {service}").stdout.rstrip()
    splitted = output.split("=")
    PID = int(splitted[1])
    assert PID > 0, f"Service {service} has invalid PID={PID}"
    return PID


@reporter.step_deco("Wrapper for neo-go dump keys command")
def dump_keys(shell: Shell, node: ClusterNode) -> dict:
    host = node.host
    service_config = host.get_service_config(node.service(MorphChain).name)
    wallet = service_config.attributes["wallet_path"]
    return neo_go_dump_keys(shell=shell, wallet=wallet)


@reporter.step_deco("Wait for object replication")
def wait_object_replication(
    cid: str,
    oid: str,
    expected_copies: int,
    shell: Shell,
    nodes: list[StorageNode],
    sleep_interval: int = 15,
    attempts: int = 20,
) -> list[StorageNode]:
    nodes_with_object = []
    for _ in range(attempts):
        nodes_with_object = get_nodes_with_object(cid, oid, shell=shell, nodes=nodes)
        if len(nodes_with_object) >= expected_copies:
            return nodes_with_object
        sleep(sleep_interval)
    raise AssertionError(
        f"Expected {expected_copies} copies of object, but found {len(nodes_with_object)}. "
        f"Waiting time {sleep_interval * attempts}"
    )


def is_all_storage_nodes_returned(cluster: Cluster) -> bool:
    with reporter.step("Run health check for all storage nodes"):
        for node in cluster.services(StorageNode):
            try:
                health_check = storage_node_healthcheck(node)
            except Exception as err:
                logger.warning(f"Node healthcheck fails with error {err}")
                return False
            if health_check.health_status != "READY" or health_check.network_status != "ONLINE":
                return False
    return True