#!/opt/cloudlinux/venv/bin/python3 -sbb
# coding:utf-8

# Copyright © Cloud Linux GmbH & Cloud Linux Software, Inc 2010-2023 All Rights Reserved
#
# Licensed under CLOUD LINUX LICENSE AGREEMENT
# http://cloudlinux.com/docs/LICENSE.TXT

from __future__ import absolute_import
from __future__ import division
from __future__ import print_function

import os
import sys
import json
import time
import getopt
import subprocess
from enum import Enum
from clcommon.utils import is_nginx_running
from clcommon.lib.cledition import is_ubuntu


class State(Enum):
    INSTALLED = 'installed'
    INSTALLING = 'installing'
    NOT_INSTALLED = 'not_installed'


class UIPackageInstaller:

    def __init__(self, package_name, package_path, error_log_path):
        self.PACKAGE_NAME = package_name
        self.PACKAGE_PATH = package_path
        self.PACKAGE_INSTALL_ERROR_LOG = error_log_path

    def install(self):
        """Initiates the installation process based on the OS type."""
        if is_ubuntu():
            self._install_package_apt()
        else:
            self._install_package_yum()
        return State.INSTALLING

    def _run_command(self, command):
        """Executes the given command and logs any output."""
        with open(self.PACKAGE_INSTALL_ERROR_LOG, 'w') as logger:
            try:
                subprocess.Popen(command,
                                 stdin=open(os.devnull, 'w'),
                                 stdout=logger,
                                 stderr=logger,
                                 shell=True,
                                 executable='/bin/bash')
            except Exception as e:
                logger.write(str(e))

    def _install_package_yum(self):
        """Installs the package using YUM."""
        command = 'yum install -y {}'.format(self.PACKAGE_NAME)
        self._run_command(command)
        return State.INSTALLING

    def _install_package_apt(self):
        """Installs the package using APT."""
        command = 'apt-get update -y && apt-get install -y {}'.format(self.PACKAGE_NAME)

        self._run_command(command)
        return State.INSTALLING

    def check_installed(self):
        """Checks if the package is installed, installing, or not installed."""
        if self._check_status() == State.INSTALLING:
            return State.INSTALLING
        else:
            return State.INSTALLED if os.path.exists(self.PACKAGE_PATH) else State.NOT_INSTALLED

    def _check_status(self):
        """Checks the installation status based on the OS type."""
        commands = []
        if is_ubuntu():
            commands = [
                '/bin/ps aux | grep "[a]pt-get install -y {}"'.format(self.PACKAGE_NAME),
                '/bin/ps aux | grep "[a]pt-get update"'
            ]
        else:
            commands = ['/bin/ps aux | grep "[y]um install -y {}"'.format(self.PACKAGE_NAME)]

        for cmd in commands:
            try:
                subprocess.check_output(['/bin/bash', '-c', cmd], stderr=subprocess.STDOUT, text=True)
                return State.INSTALLING
            except subprocess.CalledProcessError:
                pass
        return State.NOT_INSTALLED

    def get_log(self):
        """Fetches the log from the installation error log file."""
        with open(self.PACKAGE_INSTALL_ERROR_LOG, 'r') as file:
            return file.read()

    def usage(self):
        print("usage: {} {{-h|-i|-c}}\n".format(sys.argv[0]),
              "where:\n"
              "\t-h, --help: show help message\n"
              "\t-i, --install: install {} package\n".format(self.PACKAGE_NAME),
              "\t-c, --check: check status of {} package\n".format(self.PACKAGE_NAME),
              "\t-l, --log: print the log file of {} package\n".format(self.PACKAGE_NAME))
        exit(2)

    def run(self, args):
        try:
            opts, _ = getopt.getopt(args, 'hicl', ['help', 'install', 'check', 'log'])
        except getopt.GetoptError:
            self.usage()

        if not opts:
            self.usage()

        result = None
        for o, _ in opts:
            if o in ('-h', '--help'):
                self.usage()
            elif o in ('-i', '--install'):
                result = self.install().value
            elif o in ('-c', '--check'):
                result = self.check_installed().value
            elif o in ('-l', '--log'):
                result = self.get_log()

        print(json.dumps({
            "result": "success",
            "timestamp": time.time(),
            "response": result
        }))