#!/usr/bin/python3

import atexit
import io
import signal
import subprocess
import sys
import sisyphus.checkenv
import sisyphus.getclr
import sisyphus.killemerge
import sisyphus.syncdb


def sigint_handler(signal, frame):
    sys.exit(0)


signal.signal(signal.SIGINT, sigint_handler)


def start(gfx_ui=False):
    args = ['--quiet', '--depclean']

    if sisyphus.checkenv.root() and not gfx_ui:
        p_exe = subprocess.Popen(['emerge'] + args + ['--ask'])
        try:
            p_exe.wait()
            sisyphus.syncdb.lcl_tbl()
        except KeyboardInterrupt:
            p_exe.terminate()
            try:
                p_exe.wait(1)
            except subprocess.TimeoutExpired:
                p_exe.kill()
            sys.exit()
    elif gfx_ui:
        p_exe = subprocess.Popen(
            ['emerge'] + args, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
        # kill portage if the program dies or it's terminated by the user
        atexit.register(sisyphus.killemerge.start, p_exe)

        for p_out in io.TextIOWrapper(p_exe.stdout, encoding="utf-8"):
            print(p_out.rstrip())

        p_exe.wait()
        sisyphus.syncdb.lcl_tbl()
    else:
        print(sisyphus.getclr.bright_red +
              "\nYou need root permissions to do this!\n" + sisyphus.getclr.reset)
        sys.exit()