#include "ColorThemeComboBox.h"

#include "core/Cutter.h"

#include "common/ColorThemeWorker.h"
#include "common/Configuration.h"

/* Map with names of themes associated with its color palette
 * (Dark or Light), so for dark interface themes will be shown only Dark color themes
 * and for light - only light ones.
 */
static const QHash<QString, ColorFlags> kRelevantThemes = {
    { "ayu", DarkFlag },
    { "consonance", DarkFlag },
    { "darkda", DarkFlag },
    { "onedark", DarkFlag },
    { "solarized", DarkFlag },
    { "zenburn", DarkFlag },
    { "cutter", LightFlag },
    { "dark", LightFlag },
    { "matrix", LightFlag },
    { "tango", LightFlag },
    { "white", LightFlag }
};

ColorThemeComboBox::ColorThemeComboBox(QWidget *parent) : QComboBox(parent), showOnlyCustom(false)
{
    connect(this, static_cast<void (QComboBox::*)(int)>(&QComboBox::currentIndexChanged),
            this, &ColorThemeComboBox::onCurrentIndexChanged);
    updateFromConfig();
}

void ColorThemeComboBox::updateFromConfig(bool interfaceThemeChanged)
{
    QSignalBlocker signalBlockerColorBox(this);

    const int curInterfaceThemeIndex = Config()->getInterfaceTheme();
    const QList<QString> themes(showOnlyCustom
                                ? ThemeWorker().customThemes()
                                : Core()->getColorThemes());

    clear();
    for (const QString &theme : themes) {
        if (ThemeWorker().isCustomTheme(theme) ||
            (kCutterInterfaceThemesList[curInterfaceThemeIndex].flag & kRelevantThemes[theme])) {
            addItem(theme);
        }
    }

    QString curTheme = interfaceThemeChanged
        ? Config()->getLastThemeOf(kCutterInterfaceThemesList[curInterfaceThemeIndex])
        : Config()->getColorTheme();
    const int index = findText(curTheme);

    setCurrentIndex(index == -1 ? 0 : index);
    if (interfaceThemeChanged || index == -1) {
        curTheme = currentText();
        Config()->setColorTheme(curTheme);
    }
    int maxThemeLen = 0;
    for (const QString &str : themes) {
        int strLen = str.length();
        if (strLen > maxThemeLen) {
            maxThemeLen = strLen;
        }
    }
    setMinimumContentsLength(maxThemeLen);
    setSizeAdjustPolicy(QComboBox::AdjustToMinimumContentsLength);
}

void ColorThemeComboBox::onCurrentIndexChanged(int index)
{
    QString theme = itemText(index);

    int curQtThemeIndex = Config()->getInterfaceTheme();
    if (curQtThemeIndex >= kCutterInterfaceThemesList.size()) {
        curQtThemeIndex = 0;
        Config()->setInterfaceTheme(curQtThemeIndex);
    }

    Config()->setLastThemeOf(kCutterInterfaceThemesList[curQtThemeIndex], theme);
    Config()->setColorTheme(theme);
}

void ColorThemeComboBox::setShowOnlyCustom(bool value)
{
    showOnlyCustom = value;
    updateFromConfig();
}