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,
    get_object_nodes,
    lock_object,
    put_object,
    put_object_to_random_node,
)
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.testing.test_control import wait_for_success
from frostfs_testlib.utils.file_utils import generate_file


class TestObjectMetrics(ClusterTestBase):
    @wait_for_success(interval=10)
    def check_metrics_by_type(
        self, cluster_nodes: list[ClusterNode], metric_command: str, grep_by: str, metric_type: str, counter_exp: int
    ):
        counter_act = 0
        for cluster_node in cluster_nodes:
            try:
                metric_result = cluster_node.metrics.storage.get_metrics_search_by_greps(
                    command=metric_command, grep_by=grep_by
                )
                counter_act += self.calc_metrics_count_from_stdout(metric_result.stdout, metric_type)
            except RuntimeError as e:
                ...
        assert (
            counter_act == counter_exp
        ), f"Expected metric {metric_type}={counter_exp}, Actual: {counter_act} in nodes: {cluster_nodes}"

    @staticmethod
    def calc_metrics_count_from_stdout(metric_result_stdout: str, metric_type: str):
        result = re.findall(rf'type="{metric_type}"}}\s(\d+)', metric_result_stdout)
        return sum(map(int, result))

    @wait_for_success(interval=10)
    def check_object_metrics_total_and_container(
        self, cluster_nodes: list[ClusterNode], cid: str, objects_metric_total: int, objects_metric_container: int
    ):
        self.check_metrics_by_type(
            cluster_nodes,
            "frostfs_node_engine_objects_total",
            grep_by="user",
            metric_type="user",
            counter_exp=objects_metric_total,
        )

        objects_metric_container_act = 0
        for node in cluster_nodes:
            try:
                metrics_container = node.metrics.storage.get_metrics_search_by_greps(
                    command="frostfs_node_engine_container_objects_total", cid=cid, type="user"
                )
                objects_metric_container_act += self.calc_metrics_count_from_stdout(
                    metrics_container.stdout, metric_type="user"
                )
            except RuntimeError as e:
                ...
        assert (
            objects_metric_container_act == objects_metric_container
        ), f"Expected {objects_metric_container} objects in container"

    @wait_for_success(max_wait_time=120, interval=10)
    def check_object_metrics_container(
        self, cluster_nodes: list[ClusterNode], cid: str, objects_metric_container_exp: int
    ):
        objects_metric_container_act = 0
        for node in cluster_nodes:
            try:
                metrics_container = node.metrics.storage.get_metrics_search_by_greps(
                    command="frostfs_node_engine_container_objects_total", cid=cid, type="user"
                )
                objects_metric_container_act += self.calc_metrics_count_from_stdout(
                    metrics_container.stdout, metric_type="user"
                )
            except RuntimeError as e:
                ...
        assert (
            objects_metric_container_act == objects_metric_container_exp
        ), f"Expected {objects_metric_container_exp} objects in container"

    @allure.title("Object metrics of removed container")
    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,
                rule=placement_policy,
                shell=self.shell,
                endpoint=self.cluster.default_rpc_endpoint,
            )

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

        with reporter.step("Check metric appears in node where the object is located"):
            object_nodes = get_object_nodes(
                cluster=cluster, cid=cid, oid=storage_object_id, alive_node=cluster.cluster_nodes[0]
            )

            self.check_metrics_by_type(object_nodes, "frostfs_node_engine_container_objects_total", cid, "user", copies)

        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"):
            self.check_metrics_by_type(object_nodes, "frostfs_node_engine_container_objects_total", cid, "user", 0)

            for node in object_nodes:
                with pytest.raises(RuntimeError):
                    node.metrics.storage.get_metric_container(f"frostfs_node_engine_container_size_byte", cid)

    @allure.title("Object metrics, locked object, (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(
                wallet=default_wallet,
                rule=placement_policy,
                shell=self.shell,
                endpoint=self.cluster.default_rpc_endpoint,
            )

        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:
                metric_objects_total = node.metrics.storage.get_metrics_search_by_greps(
                    command="frostfs_node_engine_objects_total", type="user"
                )
                objects_metric_counter += self.calc_metrics_count_from_stdout(
                    metric_objects_total.stdout, metric_type="user"
                )

        with reporter.step("Put object to container node"):
            oid = put_object(
                wallet=default_wallet,
                path=file_path,
                cid=cid,
                shell=self.shell,
                endpoint=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
            self.check_object_metrics_total_and_container(container_nodes, cid, objects_metric_counter, metric_step)

        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
            self.check_object_metrics_total_and_container(container_nodes, cid, objects_metric_counter, 0)

        with reporter.step("Put object and lock it"):
            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
            self.check_object_metrics_total_and_container(container_nodes, cid, objects_metric_counter, metric_step)

        with reporter.step(f"Wait until remove locking 'the counter doesn't change'"):
            self.tick_epochs(epochs_to_tick=2)
            self.check_object_metrics_total_and_container(container_nodes, cid, objects_metric_counter, metric_step)

        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
            self.check_object_metrics_total_and_container(container_nodes, cid, objects_metric_counter, 0)

        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
            self.check_object_metrics_total_and_container(container_nodes, cid, objects_metric_counter, metric_step)

        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
            self.check_object_metrics_total_and_container(container_nodes, cid, objects_metric_counter, 0)

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

    @allure.title("Object metrics, stop the node")
    def test_object_metrics_stop_node(
        self,
        object_size: ObjectSize,
        max_object_size: int,
        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(
                wallet=default_wallet,
                rule=placement_policy,
                shell=self.shell,
                endpoint=self.cluster.default_rpc_endpoint,
            )

        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=self.cluster,
            )

        with reporter.step("Get current metrics for container nodes"):
            objects_metric_counter = 0
            for node in container_nodes:
                metric_objects_total = node.metrics.storage.get_metrics_search_by_greps(
                    command="frostfs_node_engine_objects_total", type="user"
                )
                objects_metric_counter += self.calc_metrics_count_from_stdout(
                    metric_objects_total.stdout, metric_type="user"
                )

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

        with reporter.step(f"Check metric in container nodes 'the counter should increase by {copies}'"):
            objects_metric_counter += copies
            self.check_object_metrics_total_and_container(container_nodes, cid, objects_metric_counter, copies)

        with reporter.step(f"Select node to stop"):
            node_to_stop = container_nodes[0]
            alive_nodes = [node for node in container_nodes if node != 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")

        with reporter.step(f"Check metric in alive nodes 'the counter should increase by 1'"):
            self.check_object_metrics_container(alive_nodes, cid, copies)

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

        with reporter.step(f"Check metric in container nodes 'the counter doesn't change'"):
            self.check_object_metrics_total_and_container(container_nodes, cid, objects_metric_counter, copies)

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