from __future__ import annotations
from ast import literal_eval
import os
import time
from typing import List, TYPE_CHECKING

from zirc.util import repl
import config
import log
from utils.util import add_cmd
import utils

if TYPE_CHECKING:
    from zirc.event import Event

    from zirc.wrappers import connection_wrapper
    from bot import Bot


@add_cmd
def alias(bot, event, irc, args):
    if args[0] == "add":
        try:
            utils.util.commands[args[1]] = utils.util.commands[args[2]]
            utils.util.alias_list.append(args[1])
        except KeyError:
            irc.reply(event, "Looks like that command doesn't exist")
    elif args[0] == "remove":
        pass


@add_cmd("exec", min_args=1, trusted=True, hide=True)
def exec_cmd(bot: Bot, event: Event, irc: connection_wrapper, args: List[str]):
    """Executes a subprocess"""
    import subprocess
    output = b''
    try:
        output = subprocess.check_output(" ".join(args), shell=True, stderr=subprocess.STDOUT)
        code = 0
    except subprocess.CalledProcessError as e:
        code: int = e.returncode
        output: bytes = e.output

    for line in output.decode().splitlines():
        try:
            if len(line): # Somehow this value turns out to be an integer somehow. It should never ever be one
                irc.reply(event, line)
        except Exception:
            log.error(f"Exec command error: Invalid Value: {line}")
    irc.reply(event, f"{event.source.nick}: Process's exit code is {code}")


@add_cmd("eval", alias=['py', '>>'], min_args=1, owner=True, hide=True)
def eval_cmd(bot: Bot, event: Event, irc: connection_wrapper, args: List[str]):
    """Admin console"""
    console = repl.Repl({'self': bot, 'bot': bot, 'irc': irc, 'event': event})
    try:
        output = console.run(" ".join(args)).splitlines()
        for line in output:
            if len(line):
                irc.reply(event, line)

    except Exception as e:
        irc.reply(event, f"{e.__class__.__name__}: {e.args[0]}")
        utils.util.print_error(irc, event)


@add_cmd("nick", owner=True, min_args=1)
def nick(bot: Bot, event: Event, irc: connection_wrapper, args: List[str]):
    """<nick>
    Changes the bot's nickname"""
    bot.config['nickname'] = args[0]
    irc.nick(args[0])


@add_cmd("log.level", admin=True, min_args=1)
def log_level(bot: Bot, event: Event, irc: connection_wrapper, args: List[str]):
    """<level>
    Changes the logging level"""
    try:
        log.setLevel(getattr(log, args[0].upper()))
        irc.reply(event, f"Set log level to {args[0]}")
    except AttributeError:
        irc.reply(event, f"Invalid log level {args}")


@add_cmd("config", admin=True, min_args=1, alias=['cfg'])
def config_cmd(bot: Bot, event: Event, irc: connection_wrapper, args: List[str]):
    """<nick>
    Changes or displays a config variable"""
    if len(args) > 1:
        if hasattr(config, args[0]):
            try:
                value = literal_eval(args[1])
            except Exception:
                value = args[1]
            setattr(config, args[0], value)
            irc.reply(event, f"Set config.{args[0]} to {args[1]}")
        else:
            irc.reply(event, f"Invalid config variable {args[0]}")
    else:
        if hasattr(config, args[0]):
            if args[0] == 'password' and event.target.startswith('#'):
                irc.reply(event, config.secretEntry)
            else:
                irc.reply(event, repr(getattr(config, args[0])))
        else:
            irc.reply(event, f"Invalid config variable {args[0]}")


@add_cmd("quit", admin=True, min_args=0)
def quit_cmd(bot: Bot, event: Event, irc: connection_wrapper, args: List[str]):
    """<text>
    Exits the bot with the QUIT message <text>."""
    irc.quit("zIRC - https://github.com/itslukej/zirc" if (
        not args) else " ".join(args))
    time.sleep(1)
    os._exit(0)


@add_cmd("reload", admin=True, min_args=1, hide=True)
def reload_cmd(bot: Bot, event: Event, irc: connection_wrapper, args: List[str]):
    """Help text"""
    if utils.util.PY34:
        reload = __import__("importlib").reload
    elif utils.util.PY3:
        reload = __import__("imp").reload

    if args[0] != "utils.util":
        try:
            del __import__('sys').modules[args[0]]
            reload(__import__(args[0]))
            irc.reply(event, "Reloaded {0}".format(args[0]))
        except ImportError:
            utils.util.print_error(irc, event)
    else:
        irc.reply(event, "Wrong module name")


@add_cmd("flushq", alias=['flush'], min_args=0, admin=True)
def flush(bot: Bot, event: Event, irc: connection_wrapper, args: List[str]):
    bot.fp.irc_queue = []
    irc.reply(event, "Cleared IRC queue")


@add_cmd("ignore", min_args=1, admin=True)
def add_ignore(bot: Bot, event: Event, irc: connection_wrapper, args: List[str]):
    """<host> [<duration|random>] [<channel>]
    Adds an ignore for the specified host"""
    utils.ignores.add_ignore(irc, event, args)
