#include "splashscreen.h"
#include "settings.h"

#include <QPainter>
#include <QPainterPath>
#include <QApplication>
#include <QScreen>
#include <QCoreApplication>
#include <QDate>

SplashScreen::SplashScreen(QWidget *parent)
    : QSplashScreen()
{
    Q_UNUSED(parent);

    // Load theme colors
    loadThemeColors();

    // Create transparent pixmap
    QPixmap pixmap(WIDTH, HEIGHT);
    pixmap.fill(Qt::transparent);
    setPixmap(pixmap);

    setWindowFlags(Qt::SplashScreen | Qt::FramelessWindowHint | Qt::WindowStaysOnTopHint);
    setAttribute(Qt::WA_TranslucentBackground);

    // Center on screen
    if (QScreen *screen = QApplication::primaryScreen()) {
        QRect screenGeometry = screen->geometry();
        int x = (screenGeometry.width() - WIDTH) / 2;
        int y = (screenGeometry.height() - HEIGHT) / 2;
        move(x, y);
    }
}

void SplashScreen::loadThemeColors()
{
    Theme theme = Settings::instance().theme();
    mPrimaryColor = QColor(theme.accentColor);
    mBgColor = QColor(theme.backgroundColor);
    mPanelColor = QColor(theme.panelColor);
    mTextColor = QColor(theme.textColor);
    mTextColorMuted = QColor(theme.textColorMuted);
    mBorderColor = QColor(theme.borderColor);
}

void SplashScreen::setStatus(const QString &message)
{
    mStatus = message;
    repaint();
    QApplication::processEvents();
}

void SplashScreen::setProgress(int value, int max)
{
    mProgress = value;
    mProgressMax = max;
    repaint();
    QApplication::processEvents();
}

void SplashScreen::setWaitForInteraction(bool wait)
{
    mWaitForInteraction = wait;
}

void SplashScreen::finish(QWidget *mainWindow)
{
    // Always show the main window
    if (mainWindow) {
        mainWindow->show();
    }

    if (mWaitForInteraction && !mInteractionReceived) {
        // Keep splash visible on top until user interacts
        mPendingMainWindow = mainWindow;
        raise();
        activateWindow();
        mStatus = "Click or press any key to continue...";
        repaint();
        return;
    }

    // Normal behavior - close splash
    close();
}

void SplashScreen::mousePressEvent(QMouseEvent *event)
{
    Q_UNUSED(event);
    mInteractionReceived = true;

    if (mWaitForInteraction && mPendingMainWindow) {
        close();  // Just close the splash
    }
}

void SplashScreen::keyPressEvent(QKeyEvent *event)
{
    Q_UNUSED(event);
    mInteractionReceived = true;

    if (mWaitForInteraction && mPendingMainWindow) {
        close();  // Just close the splash
    }
}

void SplashScreen::drawContents(QPainter *painter)
{
    painter->setRenderHint(QPainter::Antialiasing, true);
    painter->setRenderHint(QPainter::TextAntialiasing, true);

    // Create clipping path for rounded corners
    QPainterPath clipPath;
    clipPath.addRoundedRect(0, 0, WIDTH, HEIGHT, 12, 12);
    painter->setClipPath(clipPath);

    // Draw background
    painter->setPen(Qt::NoPen);
    painter->setBrush(mBgColor);
    painter->drawRect(0, 0, WIDTH, HEIGHT);

    // Draw accent stripe at top (clipped to rounded corners)
    painter->setBrush(mPrimaryColor);
    painter->drawRect(0, 0, WIDTH, 8);

    // Draw logo/title area
    QFont titleFont("Segoe UI", 36, QFont::Bold);
    painter->setFont(titleFont);
    painter->setPen(mTextColor);

    // App name with primary color accent
    QString appName = "XPlor";
    QFontMetrics titleMetrics(titleFont);
    int titleWidth = titleMetrics.horizontalAdvance(appName);
    int titleX = (WIDTH - titleWidth) / 2;
    int titleY = 80;

    // Draw "X" in primary color
    painter->setPen(mPrimaryColor);
    painter->drawText(titleX, titleY, "X");

    // Draw "Plor" in text color
    painter->setPen(mTextColor);
    int xWidth = titleMetrics.horizontalAdvance("X");
    painter->drawText(titleX + xWidth, titleY, "Plor");

    // Tagline
    QFont taglineFont("Segoe UI", 11);
    painter->setFont(taglineFont);
    painter->setPen(mTextColorMuted);
    QString tagline = "Binary File Format Explorer";
    QFontMetrics taglineMetrics(taglineFont);
    int taglineWidth = taglineMetrics.horizontalAdvance(tagline);
    painter->drawText((WIDTH - taglineWidth) / 2, titleY + 25, tagline);

    // Version info
    QFont versionFont("Segoe UI", 10);
    painter->setFont(versionFont);
    painter->setPen(mTextColorMuted);

    QString version = QString("Version %1").arg(QCoreApplication::applicationVersion());
    QFontMetrics versionMetrics(versionFont);
    int versionWidth = versionMetrics.horizontalAdvance(version);
    painter->drawText((WIDTH - versionWidth) / 2, titleY + 50, version);

    // Company/copyright - use QCoreApplication values
    QFont copyrightFont("Segoe UI", 9);
    painter->setFont(copyrightFont);
    painter->setPen(mTextColorMuted);
    QString orgName = QCoreApplication::organizationName();
    QFontMetrics copyrightMetrics(copyrightFont);
    int copyrightWidth = copyrightMetrics.horizontalAdvance(orgName);
    painter->drawText((WIDTH - copyrightWidth) / 2, HEIGHT - 45, orgName);

    QString year = QString::number(QDate::currentDate().year());
    int yearWidth = copyrightMetrics.horizontalAdvance(year);
    painter->drawText((WIDTH - yearWidth) / 2, HEIGHT - 30, year);

    // Progress bar background
    int progressX = 40;
    int progressY = HEIGHT - 80;
    int progressWidth = WIDTH - 80;
    int progressHeight = 6;

    painter->setPen(Qt::NoPen);
    painter->setBrush(mPanelColor);
    painter->drawRoundedRect(progressX, progressY, progressWidth, progressHeight, 3, 3);

    // Progress bar fill
    if (mProgressMax > 0 && mProgress > 0) {
        int fillWidth = (progressWidth * mProgress) / mProgressMax;
        if (fillWidth > 0) {
            // Gradient from primary to lighter
            QLinearGradient gradient(progressX, 0, progressX + fillWidth, 0);
            gradient.setColorAt(0, mPrimaryColor);
            gradient.setColorAt(1, mPrimaryColor.lighter(120));
            painter->setBrush(gradient);
            painter->drawRoundedRect(progressX, progressY, fillWidth, progressHeight, 3, 3);
        }
    }

    // Status text
    if (!mStatus.isEmpty()) {
        QFont statusFont("Segoe UI", 9);
        painter->setFont(statusFont);
        painter->setPen(mTextColorMuted);

        QFontMetrics statusMetrics(statusFont);
        QString elidedStatus = statusMetrics.elidedText(mStatus, Qt::ElideMiddle, progressWidth);
        painter->drawText(progressX, progressY - 8, elidedStatus);
    }

    // Draw subtle border (disable clipping first)
    painter->setClipping(false);
    painter->setPen(QPen(mBorderColor, 1));
    painter->setBrush(Qt::NoBrush);
    painter->drawRoundedRect(0, 0, WIDTH - 1, HEIGHT - 1, 12, 12);
}