# Copyright (c) 2021 Simon Ser <contact@emersion.fr>
#
# License: GNU Affero General Public License version 3
# https://www.gnu.org/licenses/agpl-3.0.en.html

import weechat
import datetime

weechat.register("soju", "soju", "0.5.0", "AGPL3", "soju bouncer integration", "", "")

BOUNCER_CAP = "soju.im/bouncer-networks"

weechat_version = int(weechat.info_get("version_number", "") or 0)

if weechat_version < 0x04000000:
    caps_option = weechat.config_get("irc.server_default.capabilities")
    caps = weechat.config_string(caps_option)
    if BOUNCER_CAP not in caps:
        if caps != "":
            caps += ","
        caps += BOUNCER_CAP
        weechat.config_option_set(caps_option, caps, 1)

main_server = None
added_networks = {}

def server_by_name(server_name):
    hdata = weechat.hdata_get("irc_server")
    server_list = weechat.hdata_get_list(hdata, "irc_servers")
    if weechat_version >= 0x03040000:
        return weechat.hdata_search(
            hdata,
            server_list,
            "${irc_server.name} == ${name}",
            {},
            {"name": server_name},
            {},
            1,
        )
    else:
        return weechat.hdata_search(
            hdata,
            server_list,
            "${irc_server.name} == " + server_name,
            1,
        )

def handle_isupport_end_msg(data, signal, signal_data):
    global main_server

    server_name = signal.split(",")[0]
    netid = weechat.info_get("irc_server_isupport_value", server_name + ",BOUNCER_NETID")

    if netid != "":
        added_networks[netid] = True

    server = server_by_name(server_name)

    hdata = weechat.hdata_get("irc_server")
    cap_list = weechat.hdata_hashtable(hdata, server, "cap_list")
    if not BOUNCER_CAP in cap_list:
        return weechat.WEECHAT_RC_OK

    if main_server is not None:
        return weechat.WEECHAT_RC_OK
    main_server = server_name

    weechat.command(weechat.buffer_search("irc", "server." + server_name), "/quote BOUNCER LISTNETWORKS")

    return weechat.WEECHAT_RC_OK

def handle_bouncer_msg(data, signal, signal_data):
    server_name = signal.split(",")[0]
    msg = weechat.info_get_hashtable("irc_message_parse", { "message": signal_data })

    args = msg["arguments"].split(" ")
    if args[0] != "NETWORK":
        return weechat.WEECHAT_RC_OK

    # Don't connect twice to the same network
    netid = args[1]
    if netid in added_networks:
        return weechat.WEECHAT_RC_OK_EAT

    # Retrieve the network name from the attributes
    net_name = None
    raw_attr_list = args[2].split(";")
    for raw_attr in raw_attr_list:
        k, v = raw_attr.split("=")
        if k == "name":
            net_name = v
            break

    check_char = lambda ch: ch.isalnum() or ch in ".-_"
    net_name = "".join(ch if check_char(ch) else "_" for ch in net_name)

    addr = weechat.config_string(weechat.config_get("irc.server." + server_name + ".addresses"))
    add_server = [
        "/server",
        "add",
        net_name,
        addr,
        "-temp",
    ]

    if weechat_version >= 0x04000000:
        add_server.append("-tls")
    else:
        add_server.append("-ssl")

    # User name settings need to be adapted for new networks
    for k in ["username", "sasl_username"]:
        v = weechat.config_string(weechat.config_get("irc.server." + server_name + "." + k))
        if not v:
            continue
        username = v.split("/", maxsplit=1)[0] + "/" + net_name
        add_server.append("-" + k + "=" + username)

    for k in ["password", "sasl_mechanism", "sasl_password"]:
        v = weechat.config_string(weechat.config_get("irc.server." + server_name + "." + k))
        add_server.append("-" + k + "=" + v)

    weechat.command(weechat.buffer_search("core", "weechat"), " ".join(add_server))
    weechat.command(weechat.buffer_search("core", "weechat"), "/connect " + net_name)

    return weechat.WEECHAT_RC_OK_EAT

def handle_cap_sync_req(data, modifier, modifier_data, requested):
    supported = modifier_data.split(",")[1].split(" ")
    if BOUNCER_CAP in supported:
        requested += " " + BOUNCER_CAP
    return requested

weechat.hook_signal("*,irc_raw_in_376", "handle_isupport_end_msg", "") # RPL_ENDOFMOTD
weechat.hook_signal("*,irc_raw_in_422", "handle_isupport_end_msg", "") # ERR_NOMOTD
weechat.hook_signal("*,irc_raw_in_bouncer", "handle_bouncer_msg", "")
if weechat_version >= 0x04000000:
    weechat.hook_modifier("irc_cap_sync_req", "handle_cap_sync_req", "")