using Gee;

class ModuleMucLog : Module {

    protected weak ModuleMuc muc;

    protected HashMap<string,RoomLog> rooms;

    class RoomLog : Object {

        public string jid;

        public string logpath;

        public string filename;

        protected weak ModuleMucLog muclog;

        protected FileStream file;

        public string getid(Time time) {

            return time.format("%s");

        }

        protected int lastday;

        protected int lastyear;

        protected int lastmonth;

        public RoomLog(ModuleMucLog muclog, string jid) {

            this.jid = jid;

            this.muclog = muclog;

            logpath = muclog.getconf(jid, "log-path", null);

            filename = null;

            write(Time.local(time_t()), "logstart", "", "Log started");

        }

        ~RoomLog() {

            write(Time.local(time_t()), "logstop", "", "Log stopped");

        }

        public static uint nick_hash(string s) {

            uint sum = 0;

            const uint k = 102, m = 54, l = 140;

            for( var j = 0, iTop = s.length; j < iTop; j++ ) {

                sum += k ^ s[j];

            }

            return ((sum ^ m)+l)%10;

        }

        public void write(Time time, string _class, string nick, string str) {

            if ((lastday != time.day)||(lastmonth != time.month)||(lastyear!=time.year)) {

                var fname = time.format(logpath).replace("<muc>",jid);

                log("muc_log", LogLevelFlags.LEVEL_INFO, "Switching log file '%s' to '%s'", filename, fname);

                if (file!=null) file.flush();

                //try {

                    file = FileStream.open(fname,"a");

                if (file==null) {

                    int start = 0;

                    int length = fname.length;

                    while (true) {

                        var pos = fname.index_of("/", start);

                        if (pos==-1)

                            break;

                        stderr.printf("--------------------- %s\n", fname[0:pos]);

                        Posix.mkdir(fname[0:pos],0777);

                        start = pos+1;

                    } 

                    file = FileStream.open(fname,"a");

                    if (file == null) {

                        log("muc_log", LogLevelFlags.LEVEL_WARNING, "Failed to create log file '%s'", fname);

                        return;

                    }

                }

                if (file.tell()==0) {

                    var loghead = muclog.getconf(jid, "log-head",null);

                    if (loghead!="null") {

                        try {

                            var headfile = new IOChannel.file(loghead,"r");

                            string head;

                            size_t length;

                            headfile.read_to_end(out head, out length);

                            headfile.shutdown(false);

                            file.printf("%s\n", head.replace("<muc>",jid).replace("<date>",time.format("%d.%m.%Y")));

                        } catch (FileError fe) {

                            log("muc_log", LogLevelFlags.LEVEL_WARNING, "Failed to read head");

                        }

                    }

                }

                filename = fname;

                lastyear = time.year; lastmonth = time.month; lastday = time.day;

            }

            var id = getid(time);

            var times = time.format("%H:%M:%S");

            var nicklass = (_class=="message") ? (" nick%u".printf(nick_hash(nick))) : "";

            file.printf("<tr id='l_%s' class='%s'><td class='time'><a id='i_%s' href='#i_%s'>%s</a></td>", id, _class, id, id, times);

            file.printf("<td class='nick%s'>%s</td><td class='text'>%s</td></tr>\n", nicklass, nick, str);

            file.flush();

        }

    }

    public string getconf(string jid, string key, string? def) {

        var res = cfg["muc "+jid, key];

        if (res==null) res = cfg["muc", key];

        if (res==null) res = def;

        return res;

    }

    public ModuleMucLog(Config cfg, Connection conn) {

        base(cfg, conn);

        rooms = new HashMap<string,RoomLog>();

        muc = null;

        foreach (var module in conn.modules) {

            if (module.name()=="muc")

                muc = (ModuleMuc)module;

        }

        if (muc==null)

            log("muc_log", LogLevelFlags.LEVEL_ERROR, "Module 'muc' is not loaded");

        muc.state_changed.connect( (conf, olds, news, desc) => {

            switch (news) {

                case ModuleMuc.State.CONNECTED:

                    if (getconf(conf.jid, "log", "no")=="yes") {

                        var room = new RoomLog(this, conf.jid); 

                        rooms[conf.jid] = room;

                        var sb = new StringBuilder();

                        var notfirst = false;

                        sb.append("Participants: ");

                        foreach (var occupant in conf.occupants.values) {

                            if (notfirst)

                                sb.append(", ");

                            else

                                notfirst=true;

                            sb.append(Markup.escape_text(occupant.nick).replace(" "," "));

                        }

                        room.write(Time.local(time_t()), "userlist", "", sb.str);

                    }

                    break;

                case ModuleMuc.State.DISCONNECTED:

                    rooms.unset(conf.jid);

                    break;

            }

        });

        muc.on_message.connect( (conf, user, message, body) => {

            if ((user!=null)&&(body!=null)&&(message.get_child("delay")==null)) {

                var room = rooms[conf.jid];

                if (room!=null) {

                    var nick = Markup.escape_text(user.nick).replace(" "," ");

                    if (body.has_prefix("/me ")) {

                        room.write(Time.local(time_t()), "action", "*", nick+Markup.escape_text(body[3:body.length]).replace("\n","<br/>"));

                    } else

                        room.write(Time.local(time_t()), "message", nick, Markup.escape_text(body).replace("\n","<br/>"));

                }

            }

        });

        muc.on_join.connect( (conf, user) => {

            var room = rooms[conf.jid];

            if (room!=null) {

                var nick = Markup.escape_text(user.nick).replace(" "," ");

                room.write(Time.local(time_t()), "join", "*", nick+" has joined the room");

            }

        });

        muc.on_part.connect( (conf, user, status) => {

            var room = rooms[conf.jid];

            if (room!=null) {

                var nick = Markup.escape_text(user.nick).replace(" "," ");

                room.write(Time.local(time_t()), "part", "*",

                    nick+" has left the room"+((status!=null) ? (": "+Markup.escape_text(status)) : ""));

            }

        });

        muc.on_nick.connect( (conf, user, prev) => {

            var room = rooms[conf.jid];

            if (room!=null) {

                var nick = Markup.escape_text(user.nick).replace(" "," ");

                var nickp = Markup.escape_text(prev).replace(" "," "); 

                room.write(Time.local(time_t()), "nickchange", "*", nickp+" is now known as "+nick);

            }

        });

    }

    public override string name() {

        return "muc_log";

    }

}