import os
import shutil
from datetime import datetime

import allure
import pytest
from frostfs_testlib.hosting import Host
from frostfs_testlib.testing.cluster_test_base import Cluster
from frostfs_testlib.testing.parallel import parallel


def pytest_generate_tests(metafunc: pytest.Metafunc):
    metafunc.fixturenames.append("repo")
    metafunc.fixturenames.append("markers")
    metafunc.parametrize(
        "repo, markers",
        [("frostfs-testcases", metafunc.config.option.markexpr)],
    )


class TestLogs:
    @allure.title("Check logs from frostfs-testcases with marks '{request.config.option.markexpr}'")
    @pytest.mark.logs_after_session
    @pytest.mark.no_healthcheck
    def test_logs_after_session(
        self, temp_directory: str, cluster: Cluster, session_start_time: datetime, request: pytest.FixtureRequest
    ):
        """
        This test automatically added to any test run to check logs from cluster for critical errors.

        """

        end_time = datetime.utcnow()
        logs_dir = os.path.join(temp_directory, "logs")
        os.makedirs(logs_dir)
        # Using \b here because 'oom' and 'panic' can sometimes be found in OID or CID
        issues_regex = r"\bpanic\b|\boom\b|too many|insufficient funds|insufficient amount of gas"

        futures = parallel(
            self._collect_logs_on_host, cluster.hosts, logs_dir, issues_regex, session_start_time, end_time
        )

        hosts_with_problems = [
            future.result() for future in futures if not future.exception() and future.result() is not None
        ]
        if hosts_with_problems:
            self._attach_logs(logs_dir)

        assert (
            not hosts_with_problems
        ), f"The following hosts contains contain critical errors in system logs: {', '.join(hosts_with_problems)}"

    def _collect_logs_on_host(self, host: Host, logs_dir: str, regex: str, since: datetime, until: datetime):
        with allure.step(f"Get logs from {host.config.address}"):
            logs = host.get_filtered_logs(regex, since, until)

        if not logs:
            return None

        with open(os.path.join(logs_dir, f"{host.config.address}.log"), "w") as file:
            file.write(logs)

        return host.config.address

    def _attach_logs(self, logs_dir: str) -> None:
        # Zip all files and attach to Allure because it is more convenient to download a single
        # zip with all logs rather than mess with individual logs files per service or node
        logs_zip_file_path = shutil.make_archive(logs_dir, "zip", logs_dir)
        allure.attach.file(logs_zip_file_path, name="logs.zip", extension="zip")