#!/usr/bin/python3

"""
    This module contains keywords which are used for asserting
    that storage policies are respected.
"""

from typing import Optional

from robot.api import logger
from robot.api.deco import keyword

import complex_object_actions
import neofs_verbs
from common import NEOFS_NETMAP
from grpc_responses import OBJECT_NOT_FOUND, error_matches_status


ROBOT_AUTO_KEYWORDS = False


@keyword('Get Object Copies')
def get_object_copies(complexity: str, wallet: str, cid: str, oid: str):
    """
        The function performs requests to all nodes of the container and
        finds out if they store a copy of the object. The procedure is
        different for simple and complex object, so the function requires
        a sign of object complexity.
        Args:
            complexity (str): the tag of object size and complexity,
                                [Simple|Complex]
            wallet (str): the path to the wallet on whose behalf the
                                copies are got
            cid (str): ID of the container
            oid (str): ID of the Object
        Returns:
            (int): the number of object copies in the container
    """
    return (get_simple_object_copies(wallet, cid, oid) if complexity == "Simple"
            else get_complex_object_copies(wallet, cid, oid))


@keyword('Get Simple Object Copies')
def get_simple_object_copies(wallet: str, cid: str, oid: str):
    """
        To figure out the number of a simple object copies, only direct
        HEAD requests should be made to the every node of the container.
        We consider non-empty HEAD response as a stored object copy.
        Args:
            wallet (str): the path to the wallet on whose behalf the
                                copies are got
            cid (str): ID of the container
            oid (str): ID of the Object
        Returns:
            (int): the number of object copies in the container
    """
    copies = 0
    for node in NEOFS_NETMAP:
        try:
            response = neofs_verbs.head_object(wallet, cid, oid,
                                               endpoint=node,
                                               is_direct=True)
            if response:
                logger.info(f"Found object {oid} on node {node}")
                copies += 1
        except Exception:
            logger.info(f"No {oid} object copy found on {node}, continue")
            continue
    return copies


@keyword('Get Complex Object Copies')
def get_complex_object_copies(wallet: str, cid: str, oid: str):
    """
        To figure out the number of a complex object copies, we firstly
        need to retrieve its Last object. We consider that the number of
        complex object copies is equal to the number of its last object
        copies. When we have the Last object ID, the task is reduced
        to getting simple object copies.
        Args:
            wallet (str): the path to the wallet on whose behalf the
                                copies are got
            cid (str): ID of the container
            oid (str): ID of the Object
        Returns:
            (int): the number of object copies in the container
    """
    last_oid = complex_object_actions.get_last_object(wallet, cid, oid)
    return get_simple_object_copies(wallet, cid, last_oid)


@keyword('Get Nodes With Object')
def get_nodes_with_object(wallet: str, cid: str, oid: str, skip_nodes: Optional[list[str]] = None) -> list[str]:
    """
       The function returns list of nodes which store
       the given object.
       Args:
            wallet (str): the path to the wallet on whose behalf
                        we request the nodes
            cid (str): ID of the container which store the object
            oid (str): object ID
            skip_nodes (list): list of nodes that should be excluded from check
       Returns:
            (list): nodes which store the object
    """
    nodes_to_search = NEOFS_NETMAP
    if skip_nodes:
        nodes_to_search = [node for node in NEOFS_NETMAP if node not in skip_nodes]

    nodes_list = []
    for node in nodes_to_search:
        try:
            res = neofs_verbs.head_object(wallet, cid, oid,
                                          endpoint=node,
                                          is_direct=True)
            if res is not None:
                logger.info(f"Found object {oid} on node {node}")
                nodes_list.append(node)
        except Exception:
            logger.info(f"No {oid} object copy found on {node}, continue")
            continue
    return nodes_list


@keyword('Get Nodes Without Object')
def get_nodes_without_object(wallet: str, cid: str, oid: str):
    """
       The function returns list of nodes which do not store
       the given object.
       Args:
            wallet (str): the path to the wallet on whose behalf
                        we request the nodes
            cid (str): ID of the container which store the object
            oid (str): object ID
       Returns:
            (list): nodes which do not store the object
    """
    nodes_list = []
    for node in NEOFS_NETMAP:
        try:
            res = neofs_verbs.head_object(wallet, cid, oid,
                                          endpoint=node,
                                          is_direct=True)
            if res is None:
                nodes_list.append(node)
        except Exception as err:
            if error_matches_status(err, OBJECT_NOT_FOUND):
                nodes_list.append(node)
            else:
                raise Exception(f'Got error {err} on head object command') from err
    return nodes_list