#include "HeaderBar.h"

#include <cmath>
#include <string>

#include <QHBoxLayout>
#include <QLabel>
#include <QPushButton>
#include <QSignalMapper>

#include "Tick.h"

const double HeaderBar::kSpeeds[]   = { 0.0, 0.5, 1.0, 2.0, 4.0 };
const int    HeaderBar::kSpeedCount = 5;

HeaderBar::HeaderBar(QWidget* parent)
    : QWidget(parent)
{
    QHBoxLayout* layout = new QHBoxLayout(this);
    layout->setContentsMargins(8, 4, 8, 4);
    layout->setSpacing(8);

    m_timeLabel   = new QLabel("00:00", this);
    m_blocksLabel = new QLabel("Blocks: 0", this);
    layout->addWidget(m_timeLabel);
    layout->addWidget(m_blocksLabel);
    layout->addStretch();

    const char* labels[] = { "0x", "0.5x", "1x", "2x", "4x" };
    QSignalMapper* mapper = new QSignalMapper(this);
    for (int i = 0; i < kSpeedCount; ++i)
    {
        QPushButton* btn = new QPushButton(labels[i], this);
        btn->setCheckable(true);
        btn->setChecked(i == 2);
        layout->addWidget(btn);
        m_speedButtons.push_back(btn);
        mapper->setMapping(btn, i);
        connect(btn, &QPushButton::clicked, mapper, qOverload<>(&QSignalMapper::map));
    }
    connect(mapper, qOverload<int>(&QSignalMapper::mapped), this, &HeaderBar::onSpeedButton);
	
    setFixedHeight(sizeHint().height());
}

void HeaderBar::onStateUpdated(Tick tick, int buildingBlocks, double gameSpeed)
{
    const int totalSeconds = static_cast<int>(ticksToSeconds(tick));
    const int minutes = totalSeconds / 60;
    const int seconds = totalSeconds % 60;

    m_timeLabel->setText(
        QString("%1:%2")
            .arg(minutes, 2, 10, QChar('0'))
            .arg(seconds, 2, 10, QChar('0')));

    m_blocksLabel->setText(QString("Blocks: %1").arg(buildingBlocks));

    for (int i = 0; i < kSpeedCount; ++i)
    {
        const bool active = (std::abs(kSpeeds[i] - gameSpeed) < 0.001);
        m_speedButtons[static_cast<std::size_t>(i)]->setChecked(active);
    }
}

void HeaderBar::onSpeedButton(int index)
{
    if (index >= 0 && index < kSpeedCount)
    {
        emit speedChanged(kSpeeds[index]);
    }
}