#!/opt/alt/python38/bin/python3
"""
Script runs command and sends message to Sentry if any exceptions occurs.
"""
import json
import logging
import os
import subprocess
import sys
from contextlib import suppress
from pathlib import Path
from typing import List

import distro
import sentry_sdk

logger = logging.getLogger(__name__)


IMUNIFY360 = "imunify360"
IMUNIFYAV = "imunify-antivirus"
IMUNIFY360_PKG = "imunify360-firewall"
LICENSE = "/var/imunify360/license.json"
LICENSE_FREE = "/var/imunify360/license-free.json"
FREE_ID = "IMUNIFYAV"
UNKNOWN_ID = "UNKNOWN"
SENTRY_DSN_PATH = Path("/opt/alt/python38/share/imunify360/sentry")
SENTRY_DSN_DEFAULT = "https://6de77a2763bd40c58fc9e3a89285aaa8@im360.sentry.cloudlinux.com/3?timeout=20"  # noqa: E501


def get_sentry_dsn() -> str:
    """Return dsn from the file or the default one."""
    try:
        return SENTRY_DSN_PATH.read_text(encoding="ascii").strip()
    except (OSError, UnicodeDecodeError):
        return SENTRY_DSN_DEFAULT


def get_server_id() -> str:
    with suppress(Exception):
        for filename in [LICENSE, LICENSE_FREE]:
            with suppress(FileNotFoundError), open(filename) as file:
                return json.load(file)['id']
    return UNKNOWN_ID


def collect_output(cmd: List[str]) -> str:
    try:
        cp = subprocess.run(cmd, stdin=subprocess.DEVNULL,
                            stdout=subprocess.PIPE, stderr=subprocess.DEVNULL)
    except OSError:
        return ''
    if cp.returncode != 0:
        return ''
    return os.fsdecode(cp.stdout)


def get_rpm_version(pkg: str) -> str:
    cmd = ['rpm', '-q', '--queryformat=%{VERSION}-%{RELEASE}', pkg]
    return collect_output(cmd)


def get_dpkg_version(pkg: str) -> str:
    cmd = ['dpkg-query', '--showformat=${Version}', '--show', pkg]
    return collect_output(cmd)


def get_current_os():
    platform_os = distro.linux_distribution()[0]
    return platform_os.lower()


def get_package_name():
    platform_os = get_current_os()
    service_name = IMUNIFY360_PKG
    if platform_os != 'ubuntu' and get_rpm_version(IMUNIFYAV):
        service_name = IMUNIFYAV
    else:
        service_name = IMUNIFY360
    return service_name


def get_service_version(service_name) -> str:
    platform_os = get_current_os()
    if platform_os != 'ubuntu':
        version = get_rpm_version(service_name)
    else:
        version = get_dpkg_version(service_name)
    return version


def configure_sentry():
    # using LoggingIntegration (contained in default Integrations)
    # logging event with *error* level will be reported to Sentry automatically
    sentry_sdk.init(dsn=get_sentry_dsn())
    with sentry_sdk.configure_scope() as scope:
        package = get_package_name()
        scope.user = {'id': get_server_id()}
        scope.set_tag('name', package)
        scope.set_tag('version', get_service_version(package))


def main(command):
    if not command:
        sys.exit("Expected execution command!")

    configure_sentry()
    try:
        result = subprocess.run(command,
                                stdout=subprocess.PIPE,
                                stderr=subprocess.PIPE,
                                check=True)
    except subprocess.CalledProcessError as exc:
        result = exc
        logger.error(
            "Command %r returned non-zero code %s,"
            "\n\t\tStdout: %s,"
            "\n\t\tStderr: %s\n",
            command,
            result.returncode,
            result.stdout.decode("utf-8", "backslashreplace"),
            result.stderr.decode("utf-8", "backslashreplace"),
        )
    sys.stdout.buffer.write(result.stdout)
    sys.stderr.buffer.write(result.stderr)
    sys.exit(result.returncode)


if __name__ == '__main__':
    main(sys.argv[1:])
