#!/usr/bin/python3

# This file is part of DarkFi (https://dark.fi)
#
# Copyright (C) 2020-2024 Dyne.org foundation
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero 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 Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <https://www.gnu.org/licenses/>.

import sys, toml, json, urwid, asyncio, logging
import src.util

from os.path import exists, join
from pathlib import Path
from src.model import Model
from src.rpc import JsonRpc
from src.view import View

class Dnetview:

    def __init__(self):
        self.ev = asyncio.new_event_loop()
        asyncio.set_event_loop(self.ev)
        self.queue = asyncio.Queue()

        os = src.util.get_os()
        config_path = src.util.user_config_dir('darkfi', os)

        suffix = '.toml'
        filename = 'dnet_config'
        path = join(config_path, filename + suffix)
        self.config = src.util.spawn_config(path)

        self.model = Model()
        self.view = View(self.model)

    async def subscribe(self, rpc, node):
        name = node['name']
        host = node['host']
        port = node['port']
        type = node['type']
        info = {}

        while True:
            try:
                await rpc.start(host, port)
                logging.debug(f'Started {name} RPC on port {port}')
                break
            except Exception as e:
                info[name] = {}
                await self.queue.put(info)
                continue
    
        if type == 'NORMAL':
            data = await rpc._make_request('p2p.get_info', [])
            info[name] = data

            await self.queue.put(info)
            await rpc.dnet_switch(True)
            await rpc.dnet_subscribe_events()
            
            while True:
                await asyncio.sleep(0.01)
                data = await rpc.reader.readline()
                try:
                    data = json.loads(data)
                    info[name] = data
                    await self.queue.put(info)
                except:
                    info[name] = {}
                    await self.queue.put(info)

            await rpc.dnet_switch(False)
    
        if type == 'LILITH':
            data = await rpc._make_request('spawns', [])
            info[name] = data
            await self.queue.put(info)

        await rpc.stop()

    async def start_connect_slots(self, nodes):
        tasks = []
        async with asyncio.TaskGroup() as tg:
            for i, node in enumerate(nodes):
                rpc = JsonRpc()
                subscribe = tg.create_task(self.subscribe(
                            rpc, node))
                nodes = tg.create_task(self.update_info())

    async def update_info(self):
        while True:
            info = await self.queue.get()
            values = list(info.values())[0]

            if not values:
                self.model.add_offline(info)

            if 'result' in values:
                result = values.get('result')
                if 'spawns' in result:
                    self.model.add_lilith(info)
                if 'channels' in result:
                    self.model.add_node(info)

            if 'params' in values:
                self.model.add_event(info)

            self.queue.task_done()

    def main(self):
        logging.basicConfig(filename='dnet.log',
                            encoding='utf-8',
                            level=logging.DEBUG)
        nodes = self.config.get('nodes')

        loop = urwid.MainLoop(self.view.ui, self.view.palette,
                              unhandled_input=self.unhandled_input,
                              event_loop=urwid.AsyncioEventLoop(
                              loop=self.ev))

        self.ev.create_task(self.start_connect_slots(nodes))
        self.ev.create_task(self.view.update_view(self.ev, loop))

        loop.run()

    def unhandled_input(self, key):
        if isinstance(key, tuple):
            return
        if key in ('q'):
            for task in asyncio.all_tasks():
                task.cancel()
            raise urwid.ExitMainLoop()
    

if __name__ == '__main__':
    dnet = Dnetview()
    dnet.main()