"""
    Onionr - Private P2P Communication

    Class to remember blocks that need to be uploaded and not shared on startup/shutdown
"""
"""
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <https://www.gnu.org/licenses/>.
"""

import atexit
import json

import deadsimplekv

import filepaths
from onionrutils import localcommand

UPLOAD_MEMORY_FILE = filepaths.upload_list

def _add_to_hidden_blocks(cache):
    for bl in cache:
        localcommand.local_command('waitforshare/' + bl, post=True)

class UploadQueue:
    """
        Saves and loads block upload info from json file
    """

    def __init__(self, communicator: 'OnionrCommunicatorDaemon'):
        """Start the UploadQueue object, loading left over uploads into queue 
        and registering save shutdown function
        """
        self.communicator = communicator
        cache = deadsimplekv.DeadSimpleKV(UPLOAD_MEMORY_FILE)
        self.store_obj = cache
        cache: list = cache.get('uploads')
        if cache == None:
            cache = []
        
        _add_to_hidden_blocks(cache)
        self.communicator.blocksToUpload.extend(cache)

        atexit.register(self.save)

    def save(self):
        """Saves to disk on shutdown or if called manually"""
        bl: list = self.communicator.blocksToUpload
        self.store_obj.put('uploads', bl)
        self.store_obj.flush()