import random
import re

import allure
import pytest
from frostfs_testlib import reporter
from frostfs_testlib.steps.cli.container import create_container, delete_container, search_nodes_with_container
from frostfs_testlib.steps.cli.object import delete_object, lock_object, put_object, put_object_to_random_node
from frostfs_testlib.steps.metrics import check_metrics_counter, get_metrics_value
from frostfs_testlib.steps.storage_policy import get_nodes_with_object
from frostfs_testlib.storage.cluster import Cluster, ClusterNode
from frostfs_testlib.storage.controllers.cluster_state_controller import ClusterStateController
from frostfs_testlib.storage.dataclasses.object_size import ObjectSize
from frostfs_testlib.storage.dataclasses.wallet import WalletInfo
from frostfs_testlib.testing.cluster_test_base import ClusterTestBase
from frostfs_testlib.utils.file_utils import generate_file


class TestObjectMetrics(ClusterTestBase):
    @allure.title("Object metrics of removed container (obj_size={object_size})")
    def test_object_metrics_removed_container(self, object_size: ObjectSize, default_wallet: WalletInfo, cluster: Cluster):
        file_path = generate_file(object_size.value)
        placement_policy = "REP 2 IN X CBF 2 SELECT 2 FROM * AS X"
        copies = 2

        with reporter.step(f"Create container with policy {placement_policy}"):
            cid = create_container(default_wallet, self.shell, cluster.default_rpc_endpoint, placement_policy)

        with reporter.step("Put object to random node"):
            oid = put_object_to_random_node(default_wallet, file_path, cid, self.shell, cluster)

        with reporter.step("Check metric appears in node where the object is located"):
            object_storage_nodes = get_nodes_with_object(cid, oid, self.shell, cluster.storage_nodes)
            object_nodes = [cluster_node for cluster_node in cluster.cluster_nodes if cluster_node.storage_node in object_storage_nodes]

            check_metrics_counter(
                object_nodes,
                counter_exp=copies,
                command="frostfs_node_engine_container_objects_total",
                cid=cid,
                type="user",
            )

        with reporter.step("Delete container"):
            delete_container(default_wallet, cid, shell=self.shell, endpoint=self.cluster.default_rpc_endpoint)

        with reporter.step("Tick Epoch"):
            self.tick_epochs(epochs_to_tick=2, wait_block=2)

        with reporter.step("Check metrics of removed containers doesn't appear in the storage node"):
            check_metrics_counter(object_nodes, counter_exp=0, command="frostfs_node_engine_container_objects_total", cid=cid, type="user")
            check_metrics_counter(object_nodes, counter_exp=0, command="frostfs_node_engine_container_size_byte", cid=cid)

            for node in object_nodes:
                all_metrics = node.metrics.storage.get_metrics_search_by_greps(command="frostfs_node_engine_container_size_byte")
                assert cid not in all_metrics.stdout, "metrics of removed containers shouldn't appear in the storage node"

    @allure.title("Object metrics, locked object (obj_size={object_size}, policy={placement_policy})")
    @pytest.mark.parametrize("placement_policy", ["REP 1 IN X CBF 1 SELECT 1 FROM * AS X", "REP 2 IN X CBF 2 SELECT 2 FROM * AS X"])
    def test_object_metrics_blocked_object(
        self, object_size: ObjectSize, default_wallet: WalletInfo, cluster: Cluster, placement_policy: str
    ):
        file_path = generate_file(object_size.value)
        metric_step = int(re.search(r"REP\s(\d+)", placement_policy).group(1))

        with reporter.step(f"Create container with policy {placement_policy}"):
            cid = create_container(default_wallet, self.shell, cluster.default_rpc_endpoint, placement_policy)

        with reporter.step("Search container nodes"):
            container_nodes = search_nodes_with_container(
                wallet=default_wallet,
                cid=cid,
                shell=self.shell,
                endpoint=self.cluster.default_rpc_endpoint,
                cluster=cluster,
            )

        with reporter.step("Get current metrics for metric_type=user"):
            objects_metric_counter = 0
            for node in container_nodes:
                objects_metric_counter += get_metrics_value(node, command="frostfs_node_engine_objects_total", type="user")

        with reporter.step("Put object to container node"):
            oid = put_object(default_wallet, file_path, cid, self.shell, container_nodes[0].storage_node.get_rpc_endpoint())

        with reporter.step(f"Check metric user 'the counter should increase by {metric_step}'"):
            objects_metric_counter += metric_step
            check_metrics_counter(
                container_nodes,
                counter_exp=objects_metric_counter,
                command="frostfs_node_engine_objects_total",
                type="user",
            )
            check_metrics_counter(
                container_nodes,
                counter_exp=metric_step,
                command="frostfs_node_engine_container_objects_total",
                cid=cid,
                type="user",
            )

        with reporter.step("Delete object"):
            delete_object(default_wallet, cid, oid, self.shell, self.cluster.default_rpc_endpoint)

        with reporter.step(f"Check metric user 'the counter should decrease by {metric_step}'"):
            objects_metric_counter -= metric_step
            check_metrics_counter(
                container_nodes,
                counter_exp=objects_metric_counter,
                command="frostfs_node_engine_objects_total",
                type="user",
            )
            check_metrics_counter(
                container_nodes,
                counter_exp=0,
                command="frostfs_node_engine_container_objects_total",
                cid=cid,
                type="user",
            )

        with reporter.step("Put object and lock it to next epoch"):
            oid = put_object(default_wallet, file_path, cid, self.shell, container_nodes[0].storage_node.get_rpc_endpoint())
            current_epoch = self.get_epoch()
            lock_object(
                default_wallet,
                cid,
                oid,
                self.shell,
                container_nodes[0].storage_node.get_rpc_endpoint(),
                expire_at=current_epoch + 1,
            )

        with reporter.step(f"Check metric user 'the counter should increase by {metric_step}'"):
            objects_metric_counter += metric_step
            check_metrics_counter(
                container_nodes,
                counter_exp=objects_metric_counter,
                command="frostfs_node_engine_objects_total",
                type="user",
            )
            check_metrics_counter(
                container_nodes,
                counter_exp=metric_step,
                command="frostfs_node_engine_container_objects_total",
                cid=cid,
                type="user",
            )

        with reporter.step(f"Wait until remove locking 'the counter doesn't change'"):
            self.tick_epochs(epochs_to_tick=2)
            check_metrics_counter(
                container_nodes,
                counter_exp=objects_metric_counter,
                command="frostfs_node_engine_objects_total",
                type="user",
            )

        with reporter.step("Delete object"):
            delete_object(default_wallet, cid, oid, self.shell, self.cluster.default_rpc_endpoint)

        with reporter.step(f"Check metric user 'the counter should decrease by {metric_step}'"):
            objects_metric_counter -= metric_step
            check_metrics_counter(
                container_nodes,
                counter_exp=objects_metric_counter,
                command="frostfs_node_engine_objects_total",
                type="user",
            )
            check_metrics_counter(
                container_nodes,
                counter_exp=0,
                command="frostfs_node_engine_container_objects_total",
                cid=cid,
                type="user",
            )

        with reporter.step("Put object with expire_at"):
            current_epoch = self.get_epoch()
            oid = put_object(
                default_wallet,
                file_path,
                cid,
                self.shell,
                container_nodes[0].storage_node.get_rpc_endpoint(),
                expire_at=current_epoch + 1,
            )

        with reporter.step(f"Check metric user 'the counter should increase by {metric_step}'"):
            objects_metric_counter += metric_step
            check_metrics_counter(
                container_nodes,
                counter_exp=objects_metric_counter,
                command="frostfs_node_engine_objects_total",
                type="user",
            )
            check_metrics_counter(
                container_nodes,
                counter_exp=metric_step,
                command="frostfs_node_engine_container_objects_total",
                cid=cid,
                type="user",
            )

        with reporter.step("Tick Epoch"):
            self.tick_epochs(epochs_to_tick=2)

        with reporter.step(f"Check metric user 'the counter should decrease by {metric_step}'"):
            objects_metric_counter -= metric_step
            check_metrics_counter(
                container_nodes,
                counter_exp=objects_metric_counter,
                command="frostfs_node_engine_objects_total",
                type="user",
            )
            check_metrics_counter(
                container_nodes,
                counter_exp=0,
                command="frostfs_node_engine_container_objects_total",
                cid=cid,
                type="user",
            )

    @allure.title("Object metrics, stop the node (obj_size={object_size})")
    def test_object_metrics_stop_node(
        self,
        object_size: ObjectSize,
        default_wallet: WalletInfo,
        cluster_state_controller: ClusterStateController,
    ):
        placement_policy = "REP 2 IN X CBF 2 SELECT 2 FROM * AS X"
        file_path = generate_file(object_size.value)
        copies = 2

        with reporter.step(f"Create container with policy {placement_policy}"):
            cid = create_container(default_wallet, self.shell, self.cluster.default_rpc_endpoint, placement_policy)

        with reporter.step(f"Check object metrics in container 'should be zero'"):
            check_metrics_counter(
                self.cluster.cluster_nodes,
                counter_exp=0,
                command="frostfs_node_engine_container_objects_total",
                type="user",
                cid=cid,
            )

        with reporter.step("Get current metrics for each nodes"):
            objects_metric_counter: dict[ClusterNode:int] = {}
            for node in self.cluster.cluster_nodes:
                objects_metric_counter[node] = get_metrics_value(node, command="frostfs_node_engine_objects_total", type="user")

        with reporter.step("Put object"):
            oid = put_object(default_wallet, file_path, cid, self.shell, self.cluster.default_rpc_endpoint)

        with reporter.step("Get object nodes"):
            object_storage_nodes = get_nodes_with_object(cid, oid, self.shell, self.cluster.storage_nodes)
            object_nodes = [
                cluster_node for cluster_node in self.cluster.cluster_nodes if cluster_node.storage_node in object_storage_nodes
            ]

        with reporter.step(f"Check metrics in object nodes 'the counter should increase by {copies}'"):
            counter_exp = sum(objects_metric_counter[node] for node in object_nodes) + copies
            check_metrics_counter(object_nodes, counter_exp=counter_exp, command="frostfs_node_engine_objects_total", type="user")
            check_metrics_counter(
                object_nodes,
                counter_exp=copies,
                command="frostfs_node_engine_container_objects_total",
                type="user",
                cid=cid,
            )

        with reporter.step(f"Select node to stop"):
            node_to_stop = random.choice(object_nodes)
            alive_nodes = set(object_nodes).difference({node_to_stop})

        with reporter.step(f"Stop the node, wait until the object is replicated to another node"):
            cluster_state_controller.stop_node_host(node_to_stop, "hard")
            objects_metric_counter[node_to_stop] += 1

        with reporter.step(f"Check metric in alive nodes 'the counter should increase'"):
            counter_exp = sum(objects_metric_counter[node] for node in alive_nodes)
            check_metrics_counter(alive_nodes, ">=", counter_exp, command="frostfs_node_engine_objects_total", type="user")

        with reporter.step("Start node"):
            cluster_state_controller.start_node_host(node_to_stop)

        with reporter.step(f"Check metric in restarted node, 'the counter doesn't change'"):
            check_metrics_counter(
                object_nodes,
                counter_exp=copies,
                command="frostfs_node_engine_container_objects_total",
                type="user",
                cid=cid,
            )