#!/usr/bin/env python3

"""Run nvim inside gnome-terminal"""

import sys
import os
import subprocess
import dbus
from time import time


APP_ID = 'org.neovim'
CLASS = 'neovim'
NAME = 'Neovim'

def find_terminal_server():
    candidates = list(filter(os.path.exists, \
                            ('/usr/lib/gnome-terminal/gnome-terminal-server', # arch et al
                             '/usr/libexec/gnome-terminal-server')))          # fedora 22
    if len(candidates) > 0:
        return candidates[0]
    else:
        print("nvim-wrapper needs gnome-terminal-server, but it wasn't found.")
        sys.exit()

SERVER_CMD = [
    find_terminal_server(),
    '--app-id', APP_ID,
    '--class', CLASS,
    '--name', NAME,
]
TERM_CMD = [
    'gnome-terminal',
    '--app-id', APP_ID,
    '--class', CLASS,
    '--name', NAME,
    '--hide-menubar',
    '-x',
    'nvim',
]


def main():
    """Run nvim inside gnome-terminal"""
    session_bus = dbus.SessionBus()

    # launch the terminal server with a custom app-id
    # and window class (so the .desktop file gets associated)
    if not session_bus.name_has_owner(APP_ID):
        subprocess.Popen(SERVER_CMD)

    # wait until the name is registered, or 2 seconds pass (when launching from
    # cold cache it might take more time)
    timeout = time() + 2
    while not session_bus.name_has_owner(APP_ID) and time() <= timeout:
        pass
    # launch nvim in a gnome-terminal instance
    if session_bus.name_has_owner(APP_ID):
        env = os.environ.copy()
        env['NVIM_TUI_ENABLE_CURSOR_SHAPE'] = '1'
        env['NVIM_TUI_ENABLE_TRUE_COLOR'] = '1'
        with open(os.devnull, 'wb') as fnull:
            subprocess.Popen(TERM_CMD + sys.argv[1:],
                             stdout=fnull,
                             stderr=fnull,
                             env=env)

if __name__ == '__main__':
    main()