'''
    Onionr - P2P Microblogging Platform & Social network

    This default plugin handles "flow" messages (global chatroom style communication)
'''
'''
    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/>.
'''

# Imports some useful libraries
import logger, config, threading, time
from onionrblockapi import Block

plugin_name = 'flow'

class OnionrFlow:
    def __init__(self):
        self.myCore = pluginapi.get_core()
        self.alreadyOutputed = []
        self.flowRunning = False
        return

    def start(self):
        message = ""
        self.flowRunning = True
        newThread = threading.Thread(target=self.showOutput)
        newThread.start()
        while self.flowRunning:
            try:
                message = logger.readline('\nInsert message into flow:').strip().replace('\n', '\\n').replace('\r', '\\r')
            except EOFError:
                pass
            except KeyboardInterrupt:
                self.flowRunning = False
            if message == "q":
                self.flowRunning = False

            if len(message) > 0:
                self.myCore.insertBlock(message)

        logger.info("Flow is exiting, goodbye")
        return

    def showOutput(self):
        while self.flowRunning:
            for blockHash in self.myCore.getBlocksByType('txt'):
                if blockHash in self.alreadyOutputed:
                    continue
                if not self.flowRunning:
                    break
                logger.info('\n------------------------')
                block = Block(blockHash, self.myCore)
                content = block.getContent()
                # Escape new lines, remove trailing whitespace, and escape ansi sequences
                content = self.myCore._utils.escapeAnsi(content.replace('\n', '\\n').replace('\r', '\\r').strip())
                logger.info("\n" + block.getDate().strftime("%m/%d %H:%M") + ' - ' + '\033[0;0m' + content)
                self.alreadyOutputed.append(blockHash)
            try:
                time.sleep(5)
            except KeyboardInterrupt:
                self.flowRunning = False
                pass

def on_init(api, data = None):
    '''
        This event is called after Onionr is initialized, but before the command
        inputted is executed. Could be called when daemon is starting or when
        just the client is running.
    '''

    # Doing this makes it so that the other functions can access the api object
    # by simply referencing the variable `pluginapi`.
    global pluginapi
    pluginapi = api
    flow = OnionrFlow()
    api.commands.register(['flow'], flow.start)
    api.commands.register_help('flow', 'Open the flow messaging interface')
    return