/*
 * server_events.c
 *
 * Copyright (C) 2012 - 2015 James Booth <boothj5@gmail.com>
 *
 * This file is part of Profanity.
 *
 * Profanity is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Profanity is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Profanity.  If not, see <http://www.gnu.org/licenses/>.
 *
 * In addition, as a special exception, the copyright holders give permission to
 * link the code of portions of this program with the OpenSSL library under
 * certain conditions as described in each individual source file, and
 * distribute linked combinations including the two.
 *
 * You must obey the GNU General Public License in all respects for all of the
 * code used other than OpenSSL. If you modify file(s) with this exception, you
 * may extend this exception to your version of the file(s), but you are not
 * obligated to do so. If you do not wish to do so, delete this exception
 * statement from your version. If you delete this exception statement from all
 * source files in the program, then also delete it here.
 *
 */

#include <string.h>
#include <stdlib.h>

#include "config.h"

#include "chat_session.h"
#include "log.h"
#include "muc.h"
#include "config/preferences.h"
#include "config/account.h"
#include "roster_list.h"

#ifdef HAVE_LIBOTR
#include "otr/otr.h"
#include <libotr/proto.h>
#endif

#include "ui/ui.h"

void
handle_room_join_error(const char * const room, const char * const err)
{
    if (muc_active(room)) {
        muc_leave(room);
    }
    ui_handle_room_join_error(room, err);
}

// handle presence stanza errors
void
handle_presence_error(const char *from, const char * const type,
    const char *err_msg)
{
    // handle error from recipient
    if (from != NULL) {
        ui_handle_recipient_error(from, err_msg);

    // handle errors from no recipient
    } else {
        ui_handle_error(err_msg);
    }
}

// handle message stanza errors
void
handle_message_error(const char * const jid, const char * const type,
    const char * const err_msg)
{
    // handle errors from no recipient
    if (jid == NULL) {
        ui_handle_error(err_msg);

    // handle recipient not found ('from' contains a value and type is 'cancel')
    } else if (type != NULL && (strcmp(type, "cancel") == 0)) {
        log_info("Recipient %s not found: %s", jid, err_msg);
        Jid *jidp = jid_create(jid);
        chat_session_remove(jidp->barejid);

    // handle any other error from recipient
    } else {
        ui_handle_recipient_error(jid, err_msg);
    }
}

void
handle_login_account_success(char *account_name)
{
    ProfAccount *account = accounts_get_account(account_name);

#ifdef HAVE_LIBOTR
    otr_on_connect(account);
#endif

    ui_handle_login_account_success(account);

    // attempt to rejoin rooms with passwords
    GList *curr = muc_rooms();
    while (curr != NULL) {
        char *password = muc_password(curr->data);
        if (password != NULL) {
            char *nick = muc_nick(curr->data);
            presence_join_room(curr->data, nick, password);
        }
        curr = g_list_next(curr);
    }
    g_list_free(curr);

    log_info("%s logged in successfully", account->jid);
    account_free(account);
}

void
handle_roster_received(void)
{
    if (prefs_get_boolean(PREF_ROSTER)) {
        ui_show_roster();
    }
}

void
handle_lost_connection(void)
{
    cons_show_error("Lost connection.");
    roster_clear();
    muc_invites_clear();
    chat_sessions_clear();
    ui_disconnected();
}

void
handle_failed_login(void)
{
    cons_show_error("Login failed.");
    log_info("Login failed");
}

void
handle_software_version_result(const char * const jid, const char * const  presence,
    const char * const name, const char * const version, const char * const os)
{
    cons_show_software_version(jid, presence, name, version, os);
}

void
handle_disco_info(const char *from, GSList *identities, GSList *features)
{
    cons_show_disco_info(from, identities, features);
}

void
handle_room_disco_info(const char * const room, GSList *identities, GSList *features)
{
    ui_show_room_disco_info(room, identities, features);
}

void
handle_disco_info_error(const char * const from, const char * const error)
{
    if (from) {
        cons_show_error("Service discovery failed for %s: %s", from, error);
    } else {
        cons_show_error("Service discovery failed: %s", error);
    }
}

void
handle_enable_carbons_error(const char * const error)
{
    cons_show_error("Server error enabling message carbons: %s", error);
}

void
handle_disable_carbons_error(const char * const error)
{
    cons_show_error("Server error disabling message carbons: %s", error);
}

void
handle_room_info_error(const char * const room, const char * const error)
{
    ui_handle_room_info_error(room, error);
}

void
handle_room_list(GSList *rooms, const char *conference_node)
{
    cons_show_room_list(rooms, conference_node);
}

void
handle_room_affiliation_list_result_error(const char * const room, const char * const affiliation,
    const char * const error)
{
    log_debug("Error retrieving %s list for room %s: %s", affiliation, room, error);
    ui_handle_room_affiliation_list_error(room, affiliation, error);
}

void
handle_room_affiliation_list(const char * const room, const char * const affiliation, GSList *jids)
{
    muc_jid_autocomplete_add_all(room, jids);
    ui_handle_room_affiliation_list(room, affiliation, jids);
}

void
handle_room_role_set_error(const char * const room, const char * const nick, const char * const role,
    const char * const error)
{
    log_debug("Error setting role %s list for room %s, user %s: %s", role, room, nick, error);
    ui_handle_room_role_set_error(room, nick, role, error);
}

void
handle_room_role_list_result_error(const char * const room, const char * const role, const char * const error)
{
    log_debug("Error retrieving %s list for room %s: %s", role, room, error);
    ui_handle_room_role_list_error(room, role, error);
}

void
handle_room_role_list(const char * const room, const char * const role, GSList *nicks)
{
    ui_handle_room_role_list(room, role, nicks);
}

void
handle_room_affiliation_set_error(const char * const room, const char * const jid, const char * const affiliation,
    const char * const error)
{
    log_debug("Error setting affiliation %s list for room %s, user %s: %s", affiliation, room, jid, error);
    ui_handle_room_affiliation_set_error(room, jid, affiliation, error);
}

void
handle_disco_items(GSList *items, const char *jid)
{
    cons_show_disco_items(items, jid);
}

void
handle_room_invite(jabber_invite_t invite_type,
    const char * const invitor, const char * const room,
    const char * const reason)
{
    if (!muc_active(room) && !muc_invites_contain(room)) {
        cons_show_room_invite(invitor, room, reason);
        muc_invites_add(room);
    }
}

void
handle_room_broadcast(const char *const room_jid,
    const char * const message)
{
    if (muc_roster_complete(room_jid)) {
        ui_room_broadcast(room_jid, message);
    } else {
        muc_pending_broadcasts_add(room_jid, message);
    }
}

void
handle_room_subject(const char * const room, const char * const nick, const char * const subject)
{
    muc_set_subject(room, subject);
    if (muc_roster_complete(room)) {
        ui_room_subject(room, nick, subject);
    }
}

void
handle_room_history(const char * const room_jid, const char * const nick,
    GTimeVal tv_stamp, const char * const message)
{
    ui_room_history(room_jid, nick, tv_stamp, message);
}

void
handle_room_message(const char * const room_jid, const char * const nick,
    const char * const message)
{
    ui_room_message(room_jid, nick, message);

    if (prefs_get_boolean(PREF_GRLOG)) {
        Jid *jid = jid_create(jabber_get_fulljid());
        groupchat_log_chat(jid->barejid, room_jid, nick, message);
        jid_destroy(jid);
    }
}

void
handle_incoming_private_message(char *fulljid, char *message)
{
    ui_incoming_private_msg(fulljid, message, NULL);
}

void
handle_carbon(char *barejid, char *message)
{
    ui_outgoing_chat_msg_carbon(barejid, message);
}

void
handle_incoming_message(char *barejid, char *resource, char *message)
{
#ifdef HAVE_LIBOTR
    gboolean was_decrypted = FALSE;
    char *newmessage;

    prof_otrpolicy_t policy = otr_get_policy(barejid);
    char *whitespace_base = strstr(message,OTRL_MESSAGE_TAG_BASE);

    //check for OTR whitespace (opportunistic or always)
    if (policy == PROF_OTRPOLICY_OPPORTUNISTIC || policy == PROF_OTRPOLICY_ALWAYS) {
        if (whitespace_base) {
            if (strstr(message, OTRL_MESSAGE_TAG_V2) || strstr(message, OTRL_MESSAGE_TAG_V1)) {
                // Remove whitespace pattern for proper display in UI
                // Handle both BASE+TAGV1/2(16+8) and BASE+TAGV1+TAGV2(16+8+8)
                int tag_length	=	24;
                if (strstr(message, OTRL_MESSAGE_TAG_V2) && strstr(message, OTRL_MESSAGE_TAG_V1)) {
                    tag_length = 32;
                }
                memmove(whitespace_base, whitespace_base+tag_length, tag_length);
                char *otr_query_message = otr_start_query();
                cons_show("OTR Whitespace pattern detected. Attempting to start OTR session...");
                message_send_chat_encrypted(barejid, otr_query_message);
            }
        }
    }
    newmessage = otr_decrypt_message(barejid, message, &was_decrypted);

    // internal OTR message
    if (newmessage == NULL) {
        return;
    }

    if (policy == PROF_OTRPOLICY_ALWAYS && !was_decrypted && !whitespace_base) {
        char *otr_query_message = otr_start_query();
        cons_show("Attempting to start OTR session...");
        message_send_chat_encrypted(barejid, otr_query_message);
    }

    ui_incoming_msg(barejid, resource, newmessage, NULL);
    chat_log_otr_msg_in(barejid, newmessage, was_decrypted);
    otr_free_message(newmessage);
#else
    ui_incoming_msg(barejid, resource, message, NULL);
    chat_log_msg_in(barejid, message);
#endif
}

void
handle_delayed_private_message(char *fulljid, char *message, GTimeVal tv_stamp)
{
    ui_incoming_private_msg(fulljid, message, &tv_stamp);
}

void
handle_delayed_message(char *barejid, char *message, GTimeVal tv_stamp)
{
    ui_incoming_msg(barejid, NULL, message, &tv_stamp);
    chat_log_msg_in_delayed(barejid, message, &tv_stamp);
}

void
handle_message_receipt(char *barejid, char *id)
{
    ui_message_receipt(barejid, id);
}

void
handle_typing(char *barejid, char *resource)
{
    ui_contact_typing(barejid, resource);
    if (ui_chat_win_exists(barejid)) {
        chat_session_recipient_typing(barejid, resource);
    }
}

void
handle_paused(char *barejid, char *resource)
{
    if (ui_chat_win_exists(barejid)) {
        chat_session_recipient_paused(barejid, resource);
    }
}

void
handle_inactive(char *barejid, char *resource)
{
    if (ui_chat_win_exists(barejid)) {
        chat_session_recipient_inactive(barejid, resource);
    }
}

void
handle_gone(const char * const barejid, const char * const resource)
{
    ui_recipient_gone(barejid, resource);
    if (ui_chat_win_exists(barejid)) {
        chat_session_recipient_gone(barejid, resource);
    }
}

void
handle_activity(const char * const barejid, const char * const resource, gboolean send_states)
{
    if (ui_chat_win_exists(barejid)) {
        chat_session_recipient_active(barejid, resource, send_states);
    }
}

void
handle_subscription(const char *barejid, jabber_subscr_t type)
{
    switch (type) {
    case PRESENCE_SUBSCRIBE:
        /* TODO: auto-subscribe if needed */
        cons_show("Received authorization request from %s", barejid);
        log_info("Received authorization request from %s", barejid);
        ui_print_system_msg_from_recipient(barejid, "Authorization request, type '/sub allow' to accept or '/sub deny' to reject");
        if (prefs_get_boolean(PREF_NOTIFY_SUB)) {
            notify_subscription(barejid);
        }
        break;
    case PRESENCE_SUBSCRIBED:
        cons_show("Subscription received from %s", barejid);
        log_info("Subscription received from %s", barejid);
        ui_print_system_msg_from_recipient(barejid, "Subscribed");
        break;
    case PRESENCE_UNSUBSCRIBED:
        cons_show("%s deleted subscription", barejid);
        log_info("%s deleted subscription", barejid);
        ui_print_system_msg_from_recipient(barejid, "Unsubscribed");
        break;
    default:
        /* unknown type */
        break;
    }
}

void
handle_contact_offline(char *barejid, char *resource, char *status)
{
    gboolean updated = roster_contact_offline(barejid, resource, status);

    if (resource != NULL && updated) {
        ui_contact_offline(barejid, resource, status);
    }

    rosterwin_roster();
    chat_session_remove(barejid);
}

void
handle_contact_online(char *barejid, Resource *resource,
    GDateTime *last_activity)
{
    gboolean updated = roster_update_presence(barejid, resource, last_activity);

    if (updated) {
        char *show_console = prefs_get_string(PREF_STATUSES_CONSOLE);
        char *show_chat_win = prefs_get_string(PREF_STATUSES_CHAT);
        PContact contact = roster_get_contact(barejid);
        if (p_contact_subscription(contact) != NULL) {
            if (strcmp(p_contact_subscription(contact), "none") != 0) {

                // show in console if "all"
                if (g_strcmp0(show_console, "all") == 0) {
                    cons_show_contact_online(contact, resource, last_activity);

                // show in console of "online" and presence online
                } else if (g_strcmp0(show_console, "online") == 0 &&
                        resource->presence == RESOURCE_ONLINE) {
                    cons_show_contact_online(contact, resource, last_activity);

                }

                // show in chat win if "all"
                if (g_strcmp0(show_chat_win, "all") == 0) {
                    ui_chat_win_contact_online(contact, resource, last_activity);

                // show in char win if "online" and presence online
                } else if (g_strcmp0(show_chat_win, "online") == 0 &&
                        resource->presence == RESOURCE_ONLINE) {
                    ui_chat_win_contact_online(contact, resource, last_activity);
                }
            }
        }
        prefs_free_string(show_console);
        prefs_free_string(show_chat_win);
    }

    rosterwin_roster();
    chat_session_remove(barejid);
}

void
handle_leave_room(const char * const room)
{
    muc_leave(room);
    ui_leave_room(room);
}

void
handle_room_destroy(const char * const room)
{
    muc_leave(room);
    ui_room_destroy(room);
}

void
handle_room_destroyed(const char * const room, const char * const new_jid, const char * const password,
    const char * const reason)
{
    muc_leave(room);
    ui_room_destroyed(room, reason, new_jid, password);
}

void
handle_room_kicked(const char * const room, const char * const actor, const char * const reason)
{
    muc_leave(room);
    ui_room_kicked(room, actor, reason);
}

void
handle_room_banned(const char * const room, const char * const actor, const char * const reason)
{
    muc_leave(room);
    ui_room_banned(room, actor, reason);
}

void
handle_room_configure(const char * const room, DataForm *form)
{
    ui_handle_room_configuration(room, form);
}

void
handle_room_configuration_form_error(const char * const room, const char * const message)
{
    ui_handle_room_configuration_form_error(room, message);
}

void
handle_room_config_submit_result(const char * const room)
{
    ui_handle_room_config_submit_result(room);
}

void
handle_room_config_submit_result_error(const char * const room, const char * const message)
{
    ui_handle_room_config_submit_result_error(room, message);
}

void
handle_room_kick_result_error(const char * const room, const char * const nick, const char * const error)
{
    ui_handle_room_kick_error(room, nick, error);
}

void
handle_room_occupant_offline(const char * const room, const char * const nick,
    const char * const show, const char * const status)
{
    muc_roster_remove(room, nick);

    char *muc_status_pref = prefs_get_string(PREF_STATUSES_MUC);
    if (g_strcmp0(muc_status_pref, "none") != 0) {
        ui_room_member_offline(room, nick);
    }
    prefs_free_string(muc_status_pref);
    occupantswin_occupants(room);
}

void
handle_room_occupent_kicked(const char * const room, const char * const nick, const char * const actor,
    const char * const reason)
{
    muc_roster_remove(room, nick);
    ui_room_member_kicked(room, nick, actor, reason);
    occupantswin_occupants(room);
}

void
handle_room_occupent_banned(const char * const room, const char * const nick, const char * const actor,
    const char * const reason)
{
    muc_roster_remove(room, nick);
    ui_room_member_banned(room, nick, actor, reason);
    occupantswin_occupants(room);
}

void
handle_group_add(const char * const contact,
    const char * const group)
{
    ui_group_added(contact, group);
}

void
handle_group_remove(const char * const contact,
    const char * const group)
{
    ui_group_removed(contact, group);
}

void
handle_roster_remove(const char * const barejid)
{
    ui_roster_remove(barejid);
}

void
handle_roster_add(const char * const barejid, const char * const name)
{
    ui_roster_add(barejid, name);
}

void
handle_roster_update(const char * const barejid, const char * const name,
    GSList *groups, const char * const subscription, gboolean pending_out)
{
    roster_update(barejid, name, groups, subscription, pending_out);
    rosterwin_roster();
}

void
handle_autoping_cancel(void)
{
    prefs_set_autoping(0);
    cons_show_error("Server ping not supported, autoping disabled.");
}

void
handle_xmpp_stanza(const char * const msg)
{
    ui_handle_stanza(msg);
}

void
handle_ping_result(const char * const from, int millis)
{
    if (from == NULL) {
        cons_show("Ping response from server: %dms.", millis);
    } else {
        cons_show("Ping response from %s: %dms.", from, millis);
    }
}

void
handle_ping_error_result(const char * const from, const char * const error)
{
    if (error == NULL) {
        cons_show_error("Error returned from pinging %s.", from);
    } else {
        cons_show_error("Error returned from pinging %s: %s.", from, error);
    }
}

void
handle_muc_self_online(const char * const room, const char * const nick, gboolean config_required,
    const char * const role, const char * const affiliation, const char * const actor, const char * const reason,
    const char * const jid, const char * const show, const char * const status)
{
    muc_roster_add(room, nick, jid, role, affiliation, show, status);
    char *old_role = muc_role_str(room);
    char *old_affiliation = muc_affiliation_str(room);
    muc_set_role(room, role);
    muc_set_affiliation(room, affiliation);

    // handle self nick change
    if (muc_nick_change_pending(room)) {
        muc_nick_change_complete(room, nick);
        ui_room_nick_change(room, nick);

    // handle roster complete
    } else if (!muc_roster_complete(room)) {
        if (muc_autojoin(room)) {
            ui_room_join(room, FALSE);
        } else {
            ui_room_join(room, TRUE);
        }
        muc_invites_remove(room);
        muc_roster_set_complete(room);

        // show roster if occupants list disabled by default
        if (!prefs_get_boolean(PREF_OCCUPANTS)) {
            GList *occupants = muc_roster(room);
            ui_room_roster(room, occupants, NULL);
            g_list_free(occupants);
        }

        char *subject = muc_subject(room);
        if (subject != NULL) {
            ui_room_subject(room, NULL, subject);
        }

        GList *pending_broadcasts = muc_pending_broadcasts(room);
        if (pending_broadcasts != NULL) {
            GList *curr = pending_broadcasts;
            while (curr != NULL) {
                ui_room_broadcast(room, curr->data);
                curr = g_list_next(curr);
            }
        }

        // room configuration required
        if (config_required) {
            muc_set_requires_config(room, TRUE);
            ui_room_requires_config(room);
        }

    // check for change in role/affiliation
    } else {
        if (prefs_get_boolean(PREF_MUC_PRIVILEGES)) {
            // both changed
            if ((g_strcmp0(role, old_role) != 0) && (g_strcmp0(affiliation, old_affiliation) != 0)) {
                ui_room_role_and_affiliation_change(room, role, affiliation, actor, reason);

            // role changed
            } else if (g_strcmp0(role, old_role) != 0) {
                ui_room_role_change(room, role, actor, reason);

            // affiliation changed
            } else if (g_strcmp0(affiliation, old_affiliation) != 0) {
                ui_room_affiliation_change(room, affiliation, actor, reason);
            }
        }
    }

    occupantswin_occupants(room);
}

void
handle_muc_occupant_online(const char * const room, const char * const nick, const char * const jid,
    const char * const role, const char * const affiliation, const char * const actor, const char * const reason,
    const char * const show, const char * const status)
{
    Occupant *occupant = muc_roster_item(room, nick);

    const char *old_role = NULL;
    const char *old_affiliation = NULL;
    if (occupant) {
        old_role = muc_occupant_role_str(occupant);
        old_affiliation = muc_occupant_affiliation_str(occupant);
    }

    gboolean updated = muc_roster_add(room, nick, jid, role, affiliation, show, status);

    // not yet finished joining room
    if (!muc_roster_complete(room)) {
        return;
    }

    // handle nickname change
    char *old_nick = muc_roster_nick_change_complete(room, nick);
    if (old_nick) {
        ui_room_member_nick_change(room, old_nick, nick);
        free(old_nick);
        occupantswin_occupants(room);
        return;
    }

    // joined room
    if (!occupant) {
        char *muc_status_pref = prefs_get_string(PREF_STATUSES_MUC);
        if (g_strcmp0(muc_status_pref, "none") != 0) {
            ui_room_member_online(room, nick, role, affiliation, show, status);
        }
        prefs_free_string(muc_status_pref);
        occupantswin_occupants(room);
        return;
    }

    // presence updated
    if (updated) {
        char *muc_status_pref = prefs_get_string(PREF_STATUSES_MUC);
        if (g_strcmp0(muc_status_pref, "all") == 0) {
            ui_room_member_presence(room, nick, show, status);
        }
        prefs_free_string(muc_status_pref);
        occupantswin_occupants(room);

    // presence unchanged, check for role/affiliation change
    } else {
        if (prefs_get_boolean(PREF_MUC_PRIVILEGES)) {
            // both changed
            if ((g_strcmp0(role, old_role) != 0) && (g_strcmp0(affiliation, old_affiliation) != 0)) {
                ui_room_occupant_role_and_affiliation_change(room, nick, role, affiliation, actor, reason);

            // role changed
            } else if (g_strcmp0(role, old_role) != 0) {
                ui_room_occupant_role_change(room, nick, role, actor, reason);

            // affiliation changed
            } else if (g_strcmp0(affiliation, old_affiliation) != 0) {
                ui_room_occupant_affiliation_change(room, nick, affiliation, actor, reason);
            }
        }
        occupantswin_occupants(room);
    }
}