#include "GamesPanel.h"

#include <QHBoxLayout>
#include <QLabel>
#include <QLineEdit>
#include <QListWidget>
#include <QPushButton>
#include <QSet>
#include <QSplitter>
#include <QVBoxLayout>

// ---------------------------------------------------------------------------
// Helper: parse "GAM <subCmd> XXXXNAME1 XXXXNAME2 ..."
// Code is always the first 4 characters; remainder is the display name.
// "_S" sequences in the name are replaced with spaces.
// ---------------------------------------------------------------------------
static QMap<QString,QString> parseGamResponse(const QString &response,
                                               const QString &subCmd)
{
    QMap<QString,QString> result;
    const QStringList tokens = response.split(' ', Qt::SkipEmptyParts);
    if (tokens.size() < 3 || tokens[0] != "GAM" || tokens[1] != subCmd)
        return result;

    for (const QString &entry : tokens.mid(2)) {
        if (entry.size() < 5) continue;
        const QString code = entry.left(4);
        QString       name = entry.mid(4);
        name.replace("_S", " ");
        if (name.isEmpty()) continue;
        result[name] = code;
    }
    return result;
}

// ---------------------------------------------------------------------------
// Constructor
// ---------------------------------------------------------------------------
GamesPanel::GamesPanel(QWidget *parent) : QWidget(parent)
{
    auto *layout   = new QHBoxLayout(this);
    layout->setContentsMargins(2, 2, 2, 2);

    auto *splitter = new QSplitter(Qt::Horizontal, this);

    // ---- Left pane: Available (not yet installed) games ----
    auto *leftWidget = new QWidget(splitter);
    auto *leftLayout = new QVBoxLayout(leftWidget);
    leftLayout->setContentsMargins(4, 4, 4, 4);
    leftLayout->setSpacing(4);

    auto *availLabel = new QLabel("<b>Available Games</b>", leftWidget);
    availLabel->setStyleSheet("color: #555;");
    m_availableList  = new QListWidget(leftWidget);
    m_availableList->addItem("Connect to load available games...");
    m_addBtn = new QPushButton("Add to Installed  →", leftWidget);
    m_addBtn->setEnabled(false);

    leftLayout->addWidget(availLabel);
    leftLayout->addWidget(m_availableList, 1);
    leftLayout->addWidget(m_addBtn);

    // ---- Right pane: Installed games + Start/Stop + time/countdown inputs ----
    auto *rightWidget = new QWidget(splitter);
    auto *rightLayout = new QVBoxLayout(rightWidget);
    rightLayout->setContentsMargins(4, 4, 4, 4);
    rightLayout->setSpacing(4);

    auto *instLabel = new QLabel("<b>Installed Games</b>", rightWidget);
    instLabel->setStyleSheet("color: #555;");
    m_installedList = new QListWidget(rightWidget);
    m_installedList->addItem("Connect to load installed games...");

    // Parameter inputs row
    auto *paramRow    = new QHBoxLayout();
    auto *timeLabel   = new QLabel("Time:", rightWidget);
    m_timeEdit        = new QLineEdit(rightWidget);
    m_timeEdit->setPlaceholderText("seconds");
    m_timeEdit->setFixedWidth(72);
    m_timeEdit->setToolTip("Optional: game duration in seconds  (adds ,t<value>)");
    auto *countLabel  = new QLabel("Countdown:", rightWidget);
    m_countdownEdit   = new QLineEdit(rightWidget);
    m_countdownEdit->setPlaceholderText("seconds");
    m_countdownEdit->setFixedWidth(72);
    m_countdownEdit->setToolTip("Optional: countdown duration in seconds  (adds ,c<value>)");
    paramRow->addWidget(timeLabel);
    paramRow->addWidget(m_timeEdit);
    paramRow->addSpacing(8);
    paramRow->addWidget(countLabel);
    paramRow->addWidget(m_countdownEdit);
    paramRow->addStretch(1);

    // Start / Stop button row
    auto *btnRow = new QHBoxLayout();
    m_startBtn   = new QPushButton("▶  Start Game", rightWidget);
    m_stopBtn    = new QPushButton("■  Stop Game",  rightWidget);
    m_startBtn->setEnabled(false);
    m_startBtn->setStyleSheet(
        "QPushButton { color: white; background-color: #2e7d32;"
        " border-radius: 4px; padding: 3px 10px; }"
        "QPushButton:hover { background-color: #1b5e20; }"
        "QPushButton:disabled { background-color: #888; color: #ccc; }");
    m_stopBtn->setStyleSheet(
        "QPushButton { color: white; background-color: #c62828;"
        " border-radius: 4px; padding: 3px 10px; }"
        "QPushButton:hover { background-color: #b71c1c; }");
    btnRow->addWidget(m_startBtn);
    btnRow->addWidget(m_stopBtn);
    btnRow->addStretch(1);

    rightLayout->addWidget(instLabel);
    rightLayout->addWidget(m_installedList, 1);
    rightLayout->addLayout(paramRow);
    rightLayout->addLayout(btnRow);

    splitter->addWidget(leftWidget);
    splitter->addWidget(rightWidget);
    splitter->setStretchFactor(0, 1);
    splitter->setStretchFactor(1, 1);
    splitter->setSizes({420, 420});

    layout->addWidget(splitter);

    // Enable Add only when available list has selection
    connect(m_availableList, &QListWidget::currentRowChanged, this,
            [this](int row) { m_addBtn->setEnabled(row >= 0); });

    // Enable Start only when installed list has selection
    connect(m_installedList, &QListWidget::currentRowChanged, this,
            [this](int row) { m_startBtn->setEnabled(row >= 0); });

    connect(m_addBtn,   &QPushButton::clicked, this, &GamesPanel::onAddClicked);
    connect(m_startBtn, &QPushButton::clicked, this, &GamesPanel::onStartClicked);
    connect(m_stopBtn,  &QPushButton::clicked, this,
            [this]() { emit commandRequested(QStringLiteral("GST")); });
}

// ---------------------------------------------------------------------------
// Load installed games  (GAM list response)
// ---------------------------------------------------------------------------
void GamesPanel::loadFromResponse(const QString &response)
{
    m_installedGames = parseGamResponse(response, "list");
    m_installedList->clear();
    for (const QString &name : m_installedGames.keys())
        m_installedList->addItem(name);
    m_startBtn->setEnabled(false);
    rebuildAvailable();
}

// ---------------------------------------------------------------------------
// Load full catalogue  (GAM listall response)
// ---------------------------------------------------------------------------
void GamesPanel::loadAllFromResponse(const QString &response)
{
    m_allGames = parseGamResponse(response, "listall");
    rebuildAvailable();
}

// ---------------------------------------------------------------------------
// Rebuild available list = allGames minus installedGames (matched by code)
// ---------------------------------------------------------------------------
void GamesPanel::rebuildAvailable()
{
    const QSet<QString> installedCodes(m_installedGames.values().begin(),
                                       m_installedGames.values().end());
    m_availableList->clear();
    for (auto it = m_allGames.constBegin(); it != m_allGames.constEnd(); ++it) {
        if (!installedCodes.contains(it.value()))
            m_availableList->addItem(it.key());
    }
    if (m_availableList->count() == 0 && !m_allGames.isEmpty())
        m_availableList->addItem("(all available games are installed)");
    m_addBtn->setEnabled(false);
}

// ---------------------------------------------------------------------------
// Add selected available game
// ---------------------------------------------------------------------------
void GamesPanel::onAddClicked()
{
    auto *item = m_availableList->currentItem();
    if (!item) return;
    const QString name = item->text();
    if (!m_allGames.contains(name)) return;
    emit commandRequested(QString("GAM add %1").arg(m_allGames[name]));
}

// ---------------------------------------------------------------------------
// Start selected installed game:
//   GST <code> ,p                           (no params)
//   GST <code> ,p,t<time>                   (time only)
//   GST <code> ,p,c<countdown>              (countdown only)
//   GST <code> ,p,t<time>,c<countdown>      (both)
// ---------------------------------------------------------------------------
void GamesPanel::onStartClicked()
{
    auto *item = m_installedList->currentItem();
    if (!item) return;
    const QString name = item->text();
    if (!m_installedGames.contains(name)) return;

    const QString code     = m_installedGames[name];
    const QString timeVal  = m_timeEdit->text().trimmed();
    const QString countVal = m_countdownEdit->text().trimmed();

    QString params = ",p";
    if (!timeVal.isEmpty())  params += QString(",t%1").arg(timeVal);
    if (!countVal.isEmpty()) params += QString(",c%1").arg(countVal);

    emit commandRequested(QString("GST %1 %2").arg(code, params));
}