#include "todomodule.h"
#include "message.h"
#include <time.h>
#include <QStringList>
#include <QDateTime>

TodoModule::TodoModule()
{

}

bool TodoModule::messageHandler(Message msg)
{
    if(msg.command.compare(QString("PRIVMSG"), Qt::CaseInsensitive) == 0)
    {
        if(msg.args.startsWith("!todo "))
        {
            answer = usage(TODO);
            Task t;
            int deltaIndex = 1;
            t.isPrivate = !msg.target.contains(getChan());
            t.recipient = msg.nick;
            t.repeat = 0;
            QStringList splitter = msg.args.split(' ');
            if(splitter[deltaIndex].compare("to") == 0)
            {
                deltaIndex += 2;
                t.recipient = splitter[2];
            }
            if(splitter.size() < deltaIndex+2)
                return true;
            QString dateString = splitter[deltaIndex];
            QStringList dateSplitter;
            bool ok;
            if(dateString.startsWith("date("))
            {
                answer = usage(DATE);
                dateString = dateString.mid(5, dateString.size() - 6);
                dateSplitter = dateString.split('/');
                if(dateSplitter.size() < 2)
                    return true;
                int day = dateSplitter[0].toUInt(&ok);
                if(!ok || day > 31 || day < 1) return true;
                dateSplitter = dateSplitter[1].split('-');
                int month = dateSplitter[0].toUInt(&ok);
                if(!ok || month > 12 || month < 1) return true;
                int hours = 0;
                int minutes = 0;
                int seconds = 0;
                if(dateSplitter.size() > 1)
                {
                    dateSplitter = dateSplitter[1].split(':');
                    hours = dateSplitter[0].toUInt(&ok);
                    if(!ok || hours > 23) return true;
                    if(dateSplitter.size() > 1)
                    {
                        minutes = dateSplitter[1].toUInt(&ok);
                        if(!ok || minutes > 59) return true;
                    }
                    if(dateSplitter.size() > 2)
                    {
                        seconds = dateSplitter[2].toUInt(&ok);
                        if(!ok || seconds > 59) return true;
                    }
                }
                QDateTime date(QDate(QDate::currentDate().year(), month, day), QTime(hours, minutes, seconds));
                t.date = date.toTime_t();
            }
            else
            {
                answer = usage(DURATION);
                dateSplitter = dateString.split(':');
                int hours = dateSplitter[0].toUInt(&ok);
                int minutes = 0;
                int seconds = 0;
                if(!ok) return true;
                if(dateSplitter.size() > 1)
                {
                    minutes = dateSplitter[1].toUInt(&ok);
                    if(!ok || minutes > 59) return true;
                }
                if(dateSplitter.size() > 2)
                {
                    seconds = dateSplitter[2].toUInt(&ok);
                    if(!ok || seconds > 59) return true;
                }
                QDateTime date = QDateTime::currentDateTime();
                minutes += hours*60;
                seconds += minutes*60;
                t.date = date.addSecs(seconds).toTime_t();
            }
            ++deltaIndex;
            if(splitter[deltaIndex].compare("every") == 0)
            {
                answer = usage(DURATION);
                dateSplitter = splitter[deltaIndex+1].split(':');
                int hours = dateSplitter[0].toUInt(&ok);
                int minutes = 0;
                int seconds = 0;
                if(!ok) return true;
                if(dateSplitter.size() > 1)
                {
                    minutes = dateSplitter[1].toUInt(&ok);
                    if(!ok || minutes > 59) return true;
                }
                if(dateSplitter.size() > 2)
                {
                    seconds = dateSplitter[2].toUInt(&ok);
                    if(!ok || seconds > 59) return true;
                }
                minutes += hours*60;
                seconds += minutes*60;
                t.repeat = seconds;
                deltaIndex += 2;
            }
            QString desc;
            bool first = true;
            for(int i=deltaIndex; i<splitter.size(); ++i)
            {
                if(first)
                    first = false;
                else
                    desc.append(" ");
                desc.append(splitter[i]);
            }
            t.description = desc;
            t.emitter = msg.nick;
            tasks.push_back(t);
            answer = say(QString("todo successfully added"));
            return true;
        }
    }
    return false;
}

QString TodoModule::usage(int type)
{
    switch(type)
    {
    default:
    case TODO:
        return say("usage = !todo [to TARGET] DATE | DURATION [every DURATION] DESCRIPTION");
    case DURATION:
        return say("DURATION = HOURS[:MINUTES[:SECONDS]]");
    case DATE:
        return say("DATE = date(DAY/MONTH[-HOUR[:MINUTE[:SECOND]]])");
    }
}