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# coding=utf-8
#
# Copyright © Cloud Linux GmbH & Cloud Linux Software, Inc 2010-2021 All Rights Reserved
#
# Licensed under CLOUD LINUX LICENSE AGREEMENT
# http://cloudlinux.com/docs/LICENCE.TXT
#
from __future__ import absolute_import
import os
from collections import OrderedDict

from typing import Dict  # NOQA

from clwizard.config import NoSuchModule, acquire_config_access
from clwizard.constants import ModuleStatus, MAIN_LOG_PATH

from clwizard.exceptions import InstallationFailedException, UserInterventionNeededError
from .base import WizardInstaller  # NOQA
from .cagefs import CagefsInstaller
from .governor import GovernorInstaller
from .nodejs import NodejsInstaller
from .php import PhpInstaller
from .python import PythonInstaller
from .ruby import RubyInstaller
from .lsapi import LsapiInstaller
from clwizard.utils import setup_logger


# order of modules is important
# add new modules in correct order
ALL_MODULES = OrderedDict([
    ('cagefs', CagefsInstaller),
    ('mysql_governor', GovernorInstaller),
    ('nodejs', NodejsInstaller),
    ('php', PhpInstaller),
    ('python', PythonInstaller),
    ('ruby', RubyInstaller),
    ('mod_lsapi', LsapiInstaller),
    # add other modules here
])

log = setup_logger('wizard.runner', MAIN_LOG_PATH)


def get_supported_modules():
    """Get list of supported modules on current control panel"""
    return {
        name: module for name, module in ALL_MODULES.items()
        if module.is_supported_by_control_panel()
    }


def run_installation():
    """Install modules according to settings in status file"""
    log.info('~' * 60)
    log.info('> Start new modules installation in process with pid %s', os.getpid())
    for name, installer_class in get_supported_modules().items():
        installer = installer_class()
        # we should re-read config each time in order to be able to 'cancel'
        with acquire_config_access() as config:
            try:
                options = config.get_module_options(module_name=name)
                state = config.get_module_status(module_name=name)
            except NoSuchModule:
                log.info(
                    "Module %s is not set for installation, skip it", name)
                continue

            # 'resume case' when we should skip already installed modules
            if state == ModuleStatus.INSTALLED:
                log.info(
                    "Module %s is already installed, skip it", name)
                continue
            elif state == ModuleStatus.CANCELLED:
                log.info(
                    "Module %s has been cancelled, skip it", name)
                continue
            elif state == ModuleStatus.AUTO_SKIPPED:
                log.info(
                    "Module %s requires manual installation. Skipping it and continue installation", name)
                continue
            config.set_module_status(
                module_name=name, new_state=ModuleStatus.INSTALLING)
        _install_module(name, installer, options=options)
    log.info('> Process with pid %s successfully finished work', os.getpid())
    log.info('-' * 60)


def _install_module(module, installer, options):
    # type: (str, WizardInstaller, Dict) -> None
    log.info("Installing module: %s", module)
    try:
        installer.run_installation(options)
    except InstallationFailedException:
        _write_module_state_atomic(
            module_name=module, new_state=ModuleStatus.FAILED)
        log.error(
            "Installation failed for module %s", module,
            extra={
                'fingerprint': ['{{ default }}', module],  # Used to group and break up events
                'data': {'options': str(options)}})  # Additional data for sentry event
        raise
    except UserInterventionNeededError:
        _write_module_state_atomic(
            module_name=module, new_state=ModuleStatus.AUTO_SKIPPED)
        log.warning("Automatic installation was skipped for module %s", module)
    except Exception as e:
        _write_module_state_atomic(
            module_name=module, new_state=ModuleStatus.FAILED)
        log.error("Installation failed for module %s", module)
        installer.app_logger.exception(
            "Unknown error occurred, please, try again "
            "or contact CloudLinux support if it happens again."
            "\n\nError: %s", str(e),
            extra={
                'fingerprint': ['{{ default }}', module, str(e)[:25]],  # Used to group and break up events
                'data': {'options': str(options)}})  # Additional data for sentry event
        raise InstallationFailedException()
    else:
        _write_module_state_atomic(
            module_name=module, new_state=ModuleStatus.INSTALLED)
        log.info("Module '%s' successfully installed "
                 "using options '%s'", module, options)


def _write_module_state_atomic(module_name, new_state):
    # type: (str, str) -> None
    with acquire_config_access() as c:
        c.set_module_status(module_name=module_name, new_state=new_state)
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