#!/usr/bin/env python3
# -*- coding: utf-8 -*-

#
# Copyright (c) 2023 Huawei Device Co., Ltd.
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#

import os
import re
import subprocess

from datetime import datetime

from util.log_util import LogUtil
from hb.helper.no_instance import NoInstance
from containers.status import throw_exception
import copy


class HandleKwargs(metaclass=NoInstance):
    compile_item_pattern = re.compile(r'\[\d+/\d+\].+')
    key_word_register_list = ["pre_msg", "log_stage", "after_msg", "log_filter", "custom_line_handle"]
    filter_print = False

    @staticmethod
    def remove_registry_kwargs(kw_dict):
        for item in HandleKwargs.key_word_register_list:
            kw_dict.pop(item, "")

    @staticmethod
    def before_msg(kw_dict):
        pre_msg = kw_dict.get('pre_msg', '')
        if pre_msg:
            LogUtil.hb_info(pre_msg)

    @staticmethod
    def set_log_stage(kw_dict):
        log_stage = kw_dict.get('log_stage', '')
        if log_stage:
            LogUtil.set_stage(log_stage)

    @staticmethod
    def remove_useless_space(cmd):
        while "" in cmd:
            cmd.remove("")
        return cmd

    @staticmethod
    def after_msg(kw_dict):
        after_msg = kw_dict.get('after_msg', '')
        if after_msg:
            LogUtil.hb_info(after_msg)

    @staticmethod
    def clear_log_stage(kw_dict):
        log_stage = kw_dict.get('log_stage', '')
        if log_stage:
            LogUtil.clear_stage()

    @staticmethod
    def handle_line(line, kw_dict):
        filter_function = kw_dict.get('custom_line_handle', False)
        if filter_function:
            return filter_function(line)
        else:
            return True, line

    @staticmethod
    def set_filter_print(log_mode, kw_dict):
        if kw_dict.get('log_filter', False) or log_mode == 'silent':
            HandleKwargs.filter_print = True

    @staticmethod
    def handle_print(line, log_mode):
        if HandleKwargs.filter_print:
            info = re.findall(HandleKwargs.compile_item_pattern, line)
            if len(info):
                LogUtil.hb_info(info[0], mode=log_mode)
        else:
            LogUtil.hb_info(line)


class SystemUtil(metaclass=NoInstance):
    @staticmethod
    def exec_command(cmd: list, log_path='out/build.log', exec_env=None, log_mode='normal',
                     **kwargs):
        raw_kwargs = copy.deepcopy(kwargs)
        HandleKwargs.remove_registry_kwargs(kwargs)

        HandleKwargs.set_log_stage(raw_kwargs)
        HandleKwargs.set_filter_print(log_mode, raw_kwargs)
        cmd = HandleKwargs.remove_useless_space(cmd)

        if not os.path.exists(os.path.dirname(log_path)):
            os.makedirs(os.path.dirname(log_path), exist_ok=True)

        HandleKwargs.before_msg(raw_kwargs)
        with open(log_path, 'at', encoding='utf-8') as log_file:
            process = subprocess.Popen(cmd,
                                       stdout=subprocess.PIPE,
                                       stderr=subprocess.STDOUT,
                                       encoding='utf-8',
                                       env=exec_env,
                                       **kwargs)
            for line in iter(process.stdout.readline, ''):
                keep_deal, new_line = HandleKwargs.handle_line(line, raw_kwargs)
                if keep_deal:
                    log_file.write(new_line)
                    HandleKwargs.handle_print(new_line, log_mode)

        process.wait()
        HandleKwargs.after_msg(raw_kwargs)
        HandleKwargs.clear_log_stage(raw_kwargs)

        ret_code = process.returncode
        if ret_code != 0:
            LogUtil.get_failed_log(log_path)
        return ret_code

    @staticmethod
    def get_current_time(time_type: str = 'default'):
        if time_type == 'timestamp':
            return int(datetime.utcnow().timestamp() * 1000)
        if time_type == 'datetime':
            return datetime.now().strftime('%Y-%m-%d %H:%M:%S')
        return datetime.now().replace(microsecond=0)


class ExecEnviron:
    def __init__(self):
        self._env = None

    @property
    def allenv(self):
        return self._env

    @property
    def allkeys(self):
        if self._env is None:
            return []
        return list(self._env.keys())

    def initenv(self):
        self._env = os.environ.copy()

    def allow(self, allowed_vars: list):
        if self._env is not None:
            allowed_env = {k: v for k, v in self._env.items() if k in allowed_vars}
            self._env = allowed_env