# -*- coding: UTF-8 -*-
#  Copyright 2020 Zhejiang Lab. All Rights Reserved.
#
#  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 pickle


def path_parser(cache_path, run, type, tag):
    run = run if not (run == '.') else 'root'
    tag = tag.replace('/', '#').replace(':', '$')
    file_path = cache_path / run / type / tag
    return file_path


class CacheIO:
    file_io = {}

    def __init__(self, file_path):
        self.file_path = file_path

    def get_file_io(self):
        # 判断该文件是否打开，若存在则返回file_io
        if self.file_path in self.file_io.keys():
            f = self.file_io[self.file_path]
        else:
            # 判断文件是否存在，不存在则创建并打开返回文件指针
            if not self.file_path.parent.exists():
                self.file_path.parent.mkdir(parents=True, exist_ok=True)
            f = open(self.file_path, 'wb')
            self.file_io[self.file_path] = f
        return f

    def set_cache(self, data):
        f = self.get_file_io()
        pickle.dump(data, f)
        f.flush()

    def get_cache(self):
        res = []
        if self.file_path.exists():
            with open(self.file_path, 'rb') as f:
                while True:
                    try:
                        item = pickle.load(f)
                        res.append(item)
                    except EOFError:
                        break
            return self.filter_data(data=res)
        else:
            return None

    def filter_data(self, data):
        path_str = str(self.file_path)
        if 'graph' in path_str:
            res = data[0]
        elif 'hyperparm' in path_str and 'metrics' in path_str:
            res = list(set(data))
        else:
            res = data
        return res