import os
import tempfile
import subprocess

from irctest.basecontrollers import BaseClientController
from irctest.basecontrollers import NotImplementedByController

TEMPLATE_CONFIG = """
[core]
nick = Sopel
host = {hostname}
use_ssl = false
port = {port}
owner = me
channels = 
timeout = 5
auth_username = {username}
auth_password = {password}
{auth_method}
"""


class SopelController(BaseClientController):
    software_name = "Sopel"
    supported_sasl_mechanisms = {
        "PLAIN",
    }
    supported_capabilities = set()  # Not exhaustive

    def __init__(self, test_config):
        super().__init__(test_config)
        self.filename = next(tempfile._get_candidate_names()) + ".cfg"
        self.proc = None

    def kill(self):
        if self.proc:
            self.proc.kill()
        if self.filename:
            try:
                os.unlink(os.path.join(os.path.expanduser("~/.sopel/"), self.filename))
            except OSError:  #  File does not exist
                pass

    def open_file(self, filename, mode="a"):
        return open(os.path.join(os.path.expanduser("~/.sopel/"), filename), mode)

    def create_config(self):
        with self.open_file(self.filename) as fd:
            pass

    def run(self, hostname, port, auth, tls_config):
        # Runs a client with the config given as arguments
        if tls_config is not None:
            raise NotImplementedByController("TLS configuration")
        assert self.proc is None
        self.create_config()
        with self.open_file(self.filename) as fd:
            fd.write(
                TEMPLATE_CONFIG.format(
                    hostname=hostname,
                    port=port,
                    username=auth.username if auth else "",
                    password=auth.password if auth else "",
                    auth_method="auth_method = sasl" if auth else "",
                )
            )
        self.proc = subprocess.Popen(["sopel", "--quiet", "-c", self.filename])


def get_irctest_controller_class():
    return SopelController