#include "preferenceeditor.h"
#include "settings.h"
#include "compression.h"

#include <QVBoxLayout>
#include <QHBoxLayout>
#include <QGroupBox>
#include <QDialogButtonBox>
#include <QFontDatabase>
#include <QFileDialog>
#include <QFileInfo>
#include <QFormLayout>
#include <QFrame>
#include <QMessageBox>

PreferenceEditor::PreferenceEditor(QWidget *parent)
    : QDialog(parent)
{
    setupUi();
    loadSettings();
    applyStylesheet();
}

void PreferenceEditor::setupUi()
{
    setWindowTitle("XPlor Preferences");
    setMinimumSize(700, 500);
    resize(800, 550);

    auto *mainLayout = new QVBoxLayout(this);
    mainLayout->setSpacing(10);
    mainLayout->setContentsMargins(15, 15, 15, 15);

    // Main content area
    auto *contentLayout = new QHBoxLayout();
    contentLayout->setSpacing(15);

    // Category list
    m_categoryList = new QListWidget(this);
    m_categoryList->setFixedWidth(160);
    m_categoryList->setSpacing(2);
    m_categoryList->addItem("Appearance");
    m_categoryList->addItem("General");
    m_categoryList->addItem("Tools");
    m_categoryList->addItem("Debug & Logging");
    m_categoryList->addItem("Tree Browser");
    m_categoryList->addItem("Previews");
    m_categoryList->setCurrentRow(0);
    connect(m_categoryList, &QListWidget::currentRowChanged, this, &PreferenceEditor::onCategoryChanged);
    contentLayout->addWidget(m_categoryList);

    // Page stack
    m_pageStack = new QStackedWidget(this);
    createAppearancePage();
    createGeneralPage();
    createToolsPage();
    createDebugPage();
    createTreePage();
    createPreviewPage();
    contentLayout->addWidget(m_pageStack, 1);

    mainLayout->addLayout(contentLayout, 1);

    // Separator
    auto *separator = new QFrame(this);
    separator->setFrameShape(QFrame::HLine);
    separator->setStyleSheet("background-color: #3c3c3c;");
    mainLayout->addWidget(separator);

    // Button box
    auto *buttonBox = new QDialogButtonBox(
        QDialogButtonBox::Ok | QDialogButtonBox::Cancel | QDialogButtonBox::Apply,
        this);
    connect(buttonBox, &QDialogButtonBox::accepted, this, &PreferenceEditor::onAccept);
    connect(buttonBox, &QDialogButtonBox::rejected, this, &QDialog::reject);
    connect(buttonBox->button(QDialogButtonBox::Apply), &QPushButton::clicked, this, &PreferenceEditor::onApply);
    mainLayout->addWidget(buttonBox);
}

void PreferenceEditor::createAppearancePage()
{
    auto *page = new QWidget(this);
    auto *layout = new QVBoxLayout(page);
    layout->setSpacing(15);

    // Title
    auto *titleLabel = new QLabel("Appearance", page);
    titleLabel->setStyleSheet("font-size: 14px; font-weight: bold; color: #ad0c0c;");
    layout->addWidget(titleLabel);

    // Theme group
    auto *themeGroup = new QGroupBox("Color Theme", page);
    auto *themeLayout = new QVBoxLayout(themeGroup);
    themeLayout->setSpacing(10);

    auto *themeRow = new QHBoxLayout();
    auto *themeLabel = new QLabel("Theme:", themeGroup);
    themeRow->addWidget(themeLabel);

    m_themeCombo = new QComboBox(themeGroup);
    for (const QString &themeName : Settings::instance().availableThemes()) {
        m_themeCombo->addItem(themeName);
    }
    connect(m_themeCombo, &QComboBox::currentTextChanged, this, &PreferenceEditor::updateThemePreview);
    themeRow->addWidget(m_themeCombo, 1);
    themeLayout->addLayout(themeRow);

    // Theme preview
    m_themePreview = new QLabel(themeGroup);
    m_themePreview->setFixedHeight(80);
    m_themePreview->setAlignment(Qt::AlignCenter);
    themeLayout->addWidget(m_themePreview);

    // Theme description
    auto *themeDesc = new QLabel(
        "Choose a color theme for the application. The theme affects the accent color "
        "and overall appearance. Changes will take effect after restarting the application.",
        themeGroup);
    themeDesc->setWordWrap(true);
    themeDesc->setStyleSheet("color: #888; font-size: 11px;");
    themeLayout->addWidget(themeDesc);

    layout->addWidget(themeGroup);
    layout->addStretch();

    m_pageStack->addWidget(page);
}

void PreferenceEditor::updateThemePreview()
{
    Theme t = Settings::getTheme(m_themeCombo->currentText());
    QString previewStyle = QString(
        "background: qlineargradient(x1:0, y1:0, x2:1, y2:0, "
        "stop:0 %1, stop:0.15 %1, stop:0.15 %2, stop:0.85 %2, stop:0.85 %3, stop:1 %3);"
        "border: 2px solid %4; border-radius: 6px; color: %5; font-weight: bold;"
    ).arg(t.accentColor, t.backgroundColor, t.panelColor, t.borderColor, t.textColor);
    m_themePreview->setStyleSheet(previewStyle);
    m_themePreview->setText(t.name);
}

void PreferenceEditor::createGeneralPage()
{
    auto *page = new QWidget(this);
    auto *layout = new QVBoxLayout(page);
    layout->setSpacing(15);

    // Title
    auto *titleLabel = new QLabel("General Settings", page);
    titleLabel->setStyleSheet("font-size: 14px; font-weight: bold; color: #ad0c0c;");
    layout->addWidget(titleLabel);

    // Export settings group
    auto *exportGroup = new QGroupBox("Export Settings", page);
    auto *exportLayout = new QFormLayout(exportGroup);
    exportLayout->setSpacing(10);

    auto *dirLayout = new QHBoxLayout();
    m_exportDirEdit = new QLineEdit(exportGroup);
    m_exportDirEdit->setPlaceholderText("Export directory path...");
    dirLayout->addWidget(m_exportDirEdit);

    auto *browseBtn = new QPushButton("Browse...", exportGroup);
    browseBtn->setFixedWidth(80);
    connect(browseBtn, &QPushButton::clicked, this, &PreferenceEditor::onBrowseExportDir);
    dirLayout->addWidget(browseBtn);
    exportLayout->addRow("Export Directory:", dirLayout);

    m_autoExportCheck = new QCheckBox("Automatically export resources when parsing", exportGroup);
    exportLayout->addRow("", m_autoExportCheck);

    layout->addWidget(exportGroup);

    // View settings group
    auto *viewGroup = new QGroupBox("View Settings", page);
    auto *viewLayout = new QFormLayout(viewGroup);
    viewLayout->setSpacing(10);

    m_fontFamilyCombo = new QComboBox(viewGroup);
    QStringList families = QFontDatabase::families();
    for (const QString &family : families) {
        if (QFontDatabase::isFixedPitch(family) || family.contains("Mono", Qt::CaseInsensitive) ||
            family == "Segoe UI" || family == "Roboto" || family == "Arial") {
            m_fontFamilyCombo->addItem(family);
        }
    }
    viewLayout->addRow("Font Family:", m_fontFamilyCombo);

    m_fontSizeSpin = new QSpinBox(viewGroup);
    m_fontSizeSpin->setRange(8, 24);
    m_fontSizeSpin->setSuffix(" pt");
    viewLayout->addRow("Font Size:", m_fontSizeSpin);

    m_zoomSpin = new QSpinBox(viewGroup);
    m_zoomSpin->setRange(50, 200);
    m_zoomSpin->setSuffix(" %");
    m_zoomSpin->setSingleStep(10);
    viewLayout->addRow("View Zoom:", m_zoomSpin);

    layout->addWidget(viewGroup);

    // Reset group
    auto *resetGroup = new QGroupBox("Reset", page);
    auto *resetLayout = new QVBoxLayout(resetGroup);
    resetLayout->setSpacing(10);

    auto *resetDesc = new QLabel(
        "Reset all settings to their default values. This will restore the default theme (XPlor Dark) "
        "and clear all customizations.",
        resetGroup);
    resetDesc->setWordWrap(true);
    resetDesc->setStyleSheet("color: #888; font-size: 11px;");
    resetLayout->addWidget(resetDesc);

    auto *resetBtn = new QPushButton("Reset All Settings", resetGroup);
    resetBtn->setStyleSheet("background-color: #8a0a0a;");
    connect(resetBtn, &QPushButton::clicked, this, &PreferenceEditor::onResetSettings);
    resetLayout->addWidget(resetBtn);

    layout->addWidget(resetGroup);
    layout->addStretch();

    m_pageStack->addWidget(page);
}

void PreferenceEditor::createToolsPage()
{
    auto *page = new QWidget(this);
    auto *layout = new QVBoxLayout(page);
    layout->setSpacing(15);

    // Title
    auto *titleLabel = new QLabel("External Tools", page);
    titleLabel->setStyleSheet("font-size: 14px; font-weight: bold; color: #ad0c0c;");
    layout->addWidget(titleLabel);

    // QuickBMS group
    auto *quickbmsGroup = new QGroupBox("QuickBMS", page);
    auto *quickbmsLayout = new QVBoxLayout(quickbmsGroup);
    quickbmsLayout->setSpacing(10);

    auto *quickbmsDesc = new QLabel(
        "QuickBMS is used for decompressing certain Xbox 360 formats (LZXTDECODE). "
        "If not configured, XPlor will attempt to find it automatically.",
        quickbmsGroup);
    quickbmsDesc->setWordWrap(true);
    quickbmsDesc->setStyleSheet("color: #888; font-size: 11px;");
    quickbmsLayout->addWidget(quickbmsDesc);

    auto *pathLayout = new QHBoxLayout();
    m_quickBmsEdit = new QLineEdit(quickbmsGroup);
    m_quickBmsEdit->setPlaceholderText("Path to quickbms.exe...");
    pathLayout->addWidget(m_quickBmsEdit);

    auto *browseBtn = new QPushButton("Browse...", quickbmsGroup);
    browseBtn->setFixedWidth(80);
    connect(browseBtn, &QPushButton::clicked, this, &PreferenceEditor::onBrowseQuickBms);
    pathLayout->addWidget(browseBtn);
    quickbmsLayout->addLayout(pathLayout);

    m_quickBmsStatus = new QLabel(quickbmsGroup);
    m_quickBmsStatus->setStyleSheet("font-size: 11px;");
    quickbmsLayout->addWidget(m_quickBmsStatus);

    // Update status when path changes
    connect(m_quickBmsEdit, &QLineEdit::textChanged, this, [this](const QString &path) {
        if (path.isEmpty()) {
            m_quickBmsStatus->setText("No path configured - will auto-detect");
            m_quickBmsStatus->setStyleSheet("color: #888; font-size: 11px;");
        } else if (QFileInfo::exists(path)) {
            m_quickBmsStatus->setText("Found: " + path);
            m_quickBmsStatus->setStyleSheet("color: #4caf50; font-size: 11px;");
        } else {
            m_quickBmsStatus->setText("Not found at specified path");
            m_quickBmsStatus->setStyleSheet("color: #f44336; font-size: 11px;");
        }
    });

    layout->addWidget(quickbmsGroup);
    layout->addStretch();

    m_pageStack->addWidget(page);
}

void PreferenceEditor::createDebugPage()
{
    auto *page = new QWidget(this);
    auto *layout = new QVBoxLayout(page);
    layout->setSpacing(15);

    // Title
    auto *titleLabel = new QLabel("Debug & Logging", page);
    titleLabel->setStyleSheet("font-size: 14px; font-weight: bold; color: #ad0c0c;");
    layout->addWidget(titleLabel);

    // Logging group
    auto *logGroup = new QGroupBox("Logging Options", page);
    auto *logLayout = new QVBoxLayout(logGroup);
    logLayout->setSpacing(10);

    m_debugLoggingCheck = new QCheckBox("Enable debug logging", logGroup);
    m_debugLoggingCheck->setToolTip("Log detailed parsing information to the Logs panel.\n"
                                     "Shows parse positions, chunk processing, and tree routing.");
    logLayout->addWidget(m_debugLoggingCheck);

    m_verboseParsingCheck = new QCheckBox("Verbose parsing output", logGroup);
    m_verboseParsingCheck->setToolTip("Show additional details during file parsing.\n"
                                       "Includes field assignments and type information.");
    logLayout->addWidget(m_verboseParsingCheck);

    m_logToFileCheck = new QCheckBox("Save logs to file", logGroup);
    m_logToFileCheck->setToolTip("Write all log entries to xplor.log in the application directory.");
    logLayout->addWidget(m_logToFileCheck);

    layout->addWidget(logGroup);

    // Info label
    auto *infoLabel = new QLabel(
        "Debug logging provides detailed information about file parsing and "
        "data processing. Enable this when troubleshooting issues with file "
        "parsing or to understand how data is being processed.\n\n"
        "Note: Extensive logging may affect performance with large files.",
        page);
    infoLabel->setWordWrap(true);
    infoLabel->setStyleSheet("color: #888; padding: 10px; background-color: #252526; border-radius: 4px;");
    layout->addWidget(infoLabel);

    layout->addStretch();

    m_pageStack->addWidget(page);
}

void PreferenceEditor::createTreePage()
{
    auto *page = new QWidget(this);
    auto *layout = new QVBoxLayout(page);
    layout->setSpacing(15);

    // Title
    auto *titleLabel = new QLabel("Tree Browser", page);
    titleLabel->setStyleSheet("font-size: 14px; font-weight: bold; color: #ad0c0c;");
    layout->addWidget(titleLabel);

    // Display group
    auto *displayGroup = new QGroupBox("Display Options", page);
    auto *displayLayout = new QVBoxLayout(displayGroup);
    displayLayout->setSpacing(10);

    m_showCountsCheck = new QCheckBox("Show item counts on categories", displayGroup);
    m_showCountsCheck->setToolTip("Display the number of children next to category names.");
    displayLayout->addWidget(m_showCountsCheck);

    m_collapseDefaultCheck = new QCheckBox("Collapse items by default", displayGroup);
    m_collapseDefaultCheck->setToolTip("New items are collapsed when added to the tree.");
    displayLayout->addWidget(m_collapseDefaultCheck);

    layout->addWidget(displayGroup);

    // Organization group
    auto *orgGroup = new QGroupBox("Organization", page);
    auto *orgLayout = new QVBoxLayout(orgGroup);
    orgLayout->setSpacing(10);

    m_groupByExtCheck = new QCheckBox("Group resources by file extension", orgGroup);
    m_groupByExtCheck->setToolTip("Organize resources into subfolders based on file extension (.wav, .tga, etc.)");
    orgLayout->addWidget(m_groupByExtCheck);

    m_naturalSortCheck = new QCheckBox("Natural sorting (1, 2, 10 instead of 1, 10, 2)", orgGroup);
    m_naturalSortCheck->setToolTip("Sort items numerically when they contain numbers.");
    orgLayout->addWidget(m_naturalSortCheck);

    layout->addWidget(orgGroup);
    layout->addStretch();

    m_pageStack->addWidget(page);
}

void PreferenceEditor::createPreviewPage()
{
    auto *page = new QWidget(this);
    auto *layout = new QVBoxLayout(page);
    layout->setSpacing(15);

    // Title
    auto *titleLabel = new QLabel("Preview Settings", page);
    titleLabel->setStyleSheet("font-size: 14px; font-weight: bold; color: #ad0c0c;");
    layout->addWidget(titleLabel);

    // Audio group
    auto *audioGroup = new QGroupBox("Audio Preview", page);
    auto *audioLayout = new QVBoxLayout(audioGroup);
    audioLayout->setSpacing(10);

    m_audioAutoPlayCheck = new QCheckBox("Auto-play audio when selected", audioGroup);
    audioLayout->addWidget(m_audioAutoPlayCheck);

    layout->addWidget(audioGroup);

    // Image group
    auto *imageGroup = new QGroupBox("Image Preview", page);
    auto *imageLayout = new QVBoxLayout(imageGroup);
    imageLayout->setSpacing(10);

    m_imageShowGridCheck = new QCheckBox("Show transparency grid", imageGroup);
    m_imageShowGridCheck->setToolTip("Display a checkered grid behind transparent images.");
    imageLayout->addWidget(m_imageShowGridCheck);

    m_imageAutoZoomCheck = new QCheckBox("Auto-zoom to fit", imageGroup);
    m_imageAutoZoomCheck->setToolTip("Automatically scale images to fit the preview area.");
    imageLayout->addWidget(m_imageAutoZoomCheck);

    layout->addWidget(imageGroup);
    layout->addStretch();

    m_pageStack->addWidget(page);
}

void PreferenceEditor::loadSettings()
{
    Settings &s = Settings::instance();

    // Appearance
    int themeIdx = m_themeCombo->findText(s.currentTheme());
    if (themeIdx >= 0) m_themeCombo->setCurrentIndex(themeIdx);
    updateThemePreview();

    // General
    m_exportDirEdit->setText(s.exportDirectory());
    m_autoExportCheck->setChecked(s.autoExportOnParse());

    // Tools
    QString qbmsPath = s.quickBmsPath();
    m_quickBmsEdit->setText(qbmsPath);
    // Trigger status update
    emit m_quickBmsEdit->textChanged(qbmsPath);

    int fontIdx = m_fontFamilyCombo->findText(s.fontFamily());
    if (fontIdx >= 0) m_fontFamilyCombo->setCurrentIndex(fontIdx);
    m_fontSizeSpin->setValue(s.fontSize());
    m_zoomSpin->setValue(s.viewZoom());

    // Debug
    m_debugLoggingCheck->setChecked(s.debugLoggingEnabled());
    m_verboseParsingCheck->setChecked(s.verboseParsingEnabled());
    m_logToFileCheck->setChecked(s.logToFileEnabled());

    // Tree
    m_showCountsCheck->setChecked(s.showItemCounts());
    m_collapseDefaultCheck->setChecked(s.collapseByDefault());
    m_groupByExtCheck->setChecked(s.groupByExtension());
    m_naturalSortCheck->setChecked(s.naturalSorting());

    // Previews
    m_audioAutoPlayCheck->setChecked(s.audioAutoPlay());
    m_imageShowGridCheck->setChecked(s.imageShowGrid());
    m_imageAutoZoomCheck->setChecked(s.imageAutoZoom());
}

void PreferenceEditor::saveSettings()
{
    Settings &s = Settings::instance();

    // Appearance
    s.setCurrentTheme(m_themeCombo->currentText());

    // General
    s.setExportDirectory(m_exportDirEdit->text());
    s.setAutoExportOnParse(m_autoExportCheck->isChecked());

    // Tools
    QString quickBmsPath = m_quickBmsEdit->text();
    s.setQuickBmsPath(quickBmsPath);
    Compression::setQuickBmsPath(quickBmsPath);

    s.setFontFamily(m_fontFamilyCombo->currentText());
    s.setFontSize(m_fontSizeSpin->value());
    s.setViewZoom(m_zoomSpin->value());

    // Debug
    s.setDebugLoggingEnabled(m_debugLoggingCheck->isChecked());
    s.setVerboseParsingEnabled(m_verboseParsingCheck->isChecked());
    s.setLogToFileEnabled(m_logToFileCheck->isChecked());

    // Tree
    s.setShowItemCounts(m_showCountsCheck->isChecked());
    s.setCollapseByDefault(m_collapseDefaultCheck->isChecked());
    s.setGroupByExtension(m_groupByExtCheck->isChecked());
    s.setNaturalSorting(m_naturalSortCheck->isChecked());

    // Previews
    s.setAudioAutoPlay(m_audioAutoPlayCheck->isChecked());
    s.setImageShowGrid(m_imageShowGridCheck->isChecked());
    s.setImageAutoZoom(m_imageAutoZoomCheck->isChecked());

    s.sync();
}

void PreferenceEditor::applyStylesheet()
{
    setStyleSheet(R"(
        QDialog {
            background-color: #1e1e1e;
            color: #d4d4d4;
        }
        QListWidget {
            background-color: #252526;
            border: 1px solid #3c3c3c;
            border-radius: 4px;
            padding: 5px;
        }
        QListWidget::item {
            padding: 8px;
            border-radius: 3px;
        }
        QListWidget::item:selected {
            background-color: #ad0c0c;
            color: white;
        }
        QListWidget::item:hover:!selected {
            background-color: #2d2d30;
        }
        QGroupBox {
            font-weight: bold;
            border: 1px solid #3c3c3c;
            border-radius: 4px;
            margin-top: 10px;
            padding-top: 10px;
        }
        QGroupBox::title {
            subcontrol-origin: margin;
            left: 10px;
            padding: 0 5px;
        }
        QCheckBox {
            spacing: 8px;
        }
        QCheckBox::indicator {
            width: 16px;
            height: 16px;
        }
        QCheckBox::indicator:unchecked {
            border: 1px solid #5c5c5c;
            background-color: #2d2d30;
            border-radius: 3px;
        }
        QCheckBox::indicator:checked {
            background-color: #ad0c0c;
            border: 1px solid #ad0c0c;
            border-radius: 3px;
        }
        QLineEdit, QComboBox, QSpinBox {
            background-color: #2d2d30;
            border: 1px solid #3c3c3c;
            border-radius: 3px;
            padding: 5px;
            min-height: 20px;
        }
        QLineEdit:focus, QComboBox:focus, QSpinBox:focus {
            border-color: #ad0c0c;
        }
        QComboBox::drop-down {
            border: none;
            padding-right: 5px;
        }
        QPushButton {
            background-color: #3c3c3c;
            border: 1px solid #5c5c5c;
            border-radius: 3px;
            padding: 6px 15px;
            min-width: 70px;
        }
        QPushButton:hover {
            background-color: #4c4c4c;
        }
        QPushButton:pressed {
            background-color: #ad0c0c;
        }
        QDialogButtonBox QPushButton {
            min-width: 80px;
        }
    )");
}

void PreferenceEditor::onCategoryChanged()
{
    m_pageStack->setCurrentIndex(m_categoryList->currentRow());
}

void PreferenceEditor::onApply()
{
    saveSettings();
}

void PreferenceEditor::onAccept()
{
    saveSettings();
    accept();
}

void PreferenceEditor::onBrowseExportDir()
{
    QString dir = QFileDialog::getExistingDirectory(this, "Select Export Directory",
                                                     m_exportDirEdit->text());
    if (!dir.isEmpty()) {
        m_exportDirEdit->setText(dir);
    }
}

void PreferenceEditor::onBrowseQuickBms()
{
    QString startDir = m_quickBmsEdit->text();
    if (startDir.isEmpty()) {
        startDir = QDir::homePath();
    } else {
        startDir = QFileInfo(startDir).absolutePath();
    }

    QString file = QFileDialog::getOpenFileName(
        this,
        "Locate QuickBMS Executable",
        startDir,
        "QuickBMS (quickbms.exe);;All Files (*.*)"
    );

    if (!file.isEmpty()) {
        m_quickBmsEdit->setText(file);
    }
}

void PreferenceEditor::onResetSettings()
{
    QMessageBox::StandardButton reply = QMessageBox::question(
        this,
        "Reset Settings",
        "Are you sure you want to reset all settings to defaults?\n\n"
        "This will restore the default theme and clear all customizations.",
        QMessageBox::Yes | QMessageBox::No,
        QMessageBox::No
    );

    if (reply == QMessageBox::Yes) {
        Settings::instance().resetToDefaults();
        loadSettings();  // Reload UI with defaults
        QMessageBox::information(this, "Settings Reset", "All settings have been reset to defaults.");
    }
}