import os
import grpc
from time import sleep

from output import format_channel_error, format_error, clear_screen, format_channel

LOOP_SLEEP_TIME = 10


class Status:
    def __init__(self, client, output, channels_file, keep_loop, show_fees):
        self.client = client
        self.output = output
        self.channels_file = channels_file
        self.keep_loop = keep_loop
        self.show_fees = show_fees

    def read_file(self, file):
        if not os.path.isfile(file):
            self.handle_error("File does not exist")
        else:
            with open(self.channels_file) as file:
                return file.read().splitlines()

    def run(self):
        if self.keep_loop:
            self.loop()
        else:
            self.once()

    def loop(self):
        while True:
            clear_screen()
            self.once()
            sleep(LOOP_SLEEP_TIME)

    def once(self):
        channels = self.read_file(self.channels_file)
        for channelID in channels:
            # TODO: Fix this with short channel ids or convert between formats
            # if len(channelID) != 18:
            #     continue
            # if not channelID.isnumeric():
            #     continue

            try:
              response = self.client.get_edge(channelID)
              node1 = self.client.get_node(response.node1_pub)
              node2 = self.client.get_node(response.node2_pub)
              
              disabled = response.node1_policy.disabled or response.node2_policy.disabled
              self.print_channel(response, node1.alias, node2.alias, disabled)
            except grpc.RpcError as e:
              self.output.print_line(format_channel_error(channelID, e.details()))
            except Exception as error:
              self.output.print_line(format_channel_error(channelID, repr(error)))
              
    def print_channel(self, channel, node1_alias, node2_alias, chan_disabled):
        self.output.print_line(format_channel(channel, node1_alias, node2_alias, chan_disabled, self.show_fees))

    def handle_error(self, error):
        self.output.print_line(format_error(error))