#include "playfield.h"

#include <QPainter>


inline QString errorStr(Error error) {
    switch(error) {
    case NoError: return QObject::tr("-");
    case EliminationTrigger: return QObject::tr("Elimination Trigger released");
    case DataHunger: return QObject::tr("Data Hunger (Bank 1 empty and executed)");
    case DivisionByZero: return QObject::tr("Division by zero");
    case InvalidBankNumber: return QObject::tr("Invalid bank number (e.g. in TRANS or BJUMP)");
    case HigherInstructionSetRequired: return QObject::tr("Higher Instruction Set required");
    case MobilityRequired: return QObject::tr("Mobility required");
    case DieExecuted: return QObject::tr("DIE executed");
    case InvalidParameter: return QObject::tr("Invalid parameter (e.g. CREATE x, -1, x)");
    case Unemployment: return QObject::tr("No more tasks left in a robot (Unemployment)");
    case InstructionDurationTooHigh: return QObject::tr("Instruction duration too high (i.e. > MaxInstrDur)");
    }
}

Playfield::Playfield(Simulator& simulator, QWidget *parent)
    : QWidget(parent)
    , simulator(simulator)
{

}


void Playfield::paintEvent(QPaintEvent* /*event*/) {
    QPainter painter(this);

    int w = qMin(width(), height()) / FIELDS_XY;
    int h = qMin(width(), height()) / FIELDS_XY;

    for(int y = 0; y < FIELDS_XY; ++y) {
        for(int x = 0; x < FIELDS_XY; ++x) {
            int xx = x * w;
            int yy = y * w;
            painter.setPen(Qt::black);
            painter.setBrush(Qt::gray);
            painter.drawRect(QRect(xx, yy,w, h));
        }
    }


    for (auto& program : simulator.programs) {
        int xx = program.position.x * w;
        int yy = program.position.y * w;
        painter.setPen(QPen(program.team->color, 3));
        painter.setBrush(Qt::NoBrush);
        QRect rect(xx, yy,w+1, h+1);
        painter.drawEllipse(QPointF(rect.center().x(), rect.center().y()), w/2.3, h/2.3);

        auto& taskIndex = program.taskIndex;

        painter.drawText(rect, QString("%1").arg(program.error));

        if(program.tasks.empty()) {
            continue;
        }

        taskIndex += 1;
        taskIndex %= program.tasks.size();

        if (taskIndex < program.tasks.size()) {
            auto& task = program.tasks[taskIndex];

            if(task.bankIndex < program.banks.size() && program.banks[task.bankIndex]) {
                painter.setPen(QPen(program.banks[task.bankIndex]->team->color, 3));
            }
            else {
                painter.setPen(QPen(Qt::white, 3));
            }

            switch(task.direction) {
            case Right: painter.drawLine(rect.center(), QPoint(rect.right(), rect.center().y())); break;
            case Down: painter.drawLine(rect.center(), QPoint(rect.center().x(), rect.bottom())); break;
            case Left: painter.drawLine(rect.center(), QPoint(rect.left(), rect.center().y())); break;
            case Up: painter.drawLine(rect.center(), QPoint(rect.center().x(), rect.top())); break;
            }
//            painter.drawText(rect, QString("%1:%2:%3").arg(program.banks.size()).arg(task.bankIndex).arg(task.instIndex));
        }

    }
}