#include <QApplication>
#include <QStyleFactory>
#include <QPalette>
#include <QFont>
#include <QFontMetrics>
#include "theme.h"

QColor Theme::white = QColor(0xf7, 0xd9, 0xc8);
QColor Theme::red = QColor(0xfc, 0x66, 0x21);
QColor Theme::green = QColor(0xaa, 0xeb, 0xc4);
QColor Theme::blue = QColor(0x0d, 0xa9, 0xf1);
QColor Theme::black = QColor(25, 25, 25);
QColor Theme::gray = QColor(0x32, 0x32, 0x32);
float Theme::normalAlpha = 96.0 / 255;
float Theme::checkedAlpha = 1.0;
float Theme::edgeAlpha = 1.0;
float Theme::fillAlpha = 50.0 / 255;
int Theme::toolIconFontSize = 0;
int Theme::toolIconSize = 0;
int Theme::miniIconFontSize = 0;
int Theme::miniIconSize = 0;
int Theme::partPreviewImageSize = 0;
int Theme::materialPreviewImageSize = 0;
int Theme::sidebarPreferredWidth = 0;
int Theme::previewIconBorderSize = 0;
int Theme::previewIconMargin = 0;
int Theme::previewIconBorderRadius = 0;

void Theme::initialize()
{
    QApplication::setStyle(QStyleFactory::create("Fusion"));

    QPalette darkPalette;
    darkPalette.setColor(QPalette::Window, QColor(0x25, 0x25, 0x25));
    darkPalette.setColor(QPalette::WindowText, QColor(0xf7, 0xd9, 0xc8));
    darkPalette.setColor(QPalette::Base, QColor(25, 25, 25));
    darkPalette.setColor(QPalette::AlternateBase, QColor(53, 53, 53));
    darkPalette.setColor(QPalette::Text, QColor(0xf7, 0xd9, 0xc8));
    darkPalette.setColor(QPalette::Disabled, QPalette::Text, QColor(0x25, 0x25, 0x25));
    darkPalette.setColor(QPalette::Button, QColor(53, 53, 53));
    darkPalette.setColor(QPalette::ButtonText, QColor(0xf7, 0xd9, 0xc8));
    darkPalette.setColor(QPalette::BrightText, QColor(0xfc, 0x66, 0x21));
    darkPalette.setColor(QPalette::Link, QColor(42, 130, 218));
    darkPalette.setColor(QPalette::Highlight, QColor(0xfc, 0x66, 0x21));
    darkPalette.setColor(QPalette::HighlightedText, QColor(0x25, 0x25, 0x25));    
    QApplication::setPalette(darkPalette);
    
    QFont font;
    font.setWeight(QFont::Light);
    font.setBold(false);
    QApplication::setFont(font);
    
    QFontMetrics fontMetrics(QApplication::font());
    Theme::toolIconFontSize = fontMetrics.height();
    Theme::toolIconSize = (int)(Theme::toolIconFontSize * 1.5);
    Theme::miniIconFontSize = (int)(Theme::toolIconFontSize * 0.85);
    Theme::miniIconSize = (int)(Theme::miniIconFontSize * 1.67);
    Theme::partPreviewImageSize = (Theme::miniIconSize * 2.3);
    Theme::sidebarPreferredWidth = Theme::partPreviewImageSize * 4.5;
    Theme::materialPreviewImageSize = Theme::sidebarPreferredWidth * 0.4;
    Theme::previewIconBorderSize = std::max(1, Theme::partPreviewImageSize / 20);
    Theme::previewIconMargin = std::max(1, Theme::previewIconBorderSize / 2);
    Theme::previewIconBorderRadius = std::max(3, Theme::partPreviewImageSize / 10);
}

QtAwesome *Theme::awesome()
{
    static QtAwesome *s_awesome = nullptr;
    if (nullptr == s_awesome) {
        s_awesome = new QtAwesome();
        s_awesome->initFontAwesome();
        s_awesome->setDefaultOption("color", Theme::white);
        s_awesome->setDefaultOption("color-disabled", QColor(0xcc, 0xcc, 0xcc));
        s_awesome->setDefaultOption("color-active", Theme::white);
        s_awesome->setDefaultOption("color-selected", Theme::white);
    }
    return s_awesome;
}

void Theme::initAwesomeButton(QPushButton *button)
{
    button->setFont(Theme::awesome()->font(Theme::toolIconFontSize));
    button->setFixedSize(Theme::toolIconSize, Theme::toolIconSize);
    button->setStyleSheet("QPushButton {color: " + Theme::white.name() + "}");
    button->setFocusPolicy(Qt::NoFocus);
}

void Theme::initAwesomeLabel(QLabel *label)
{
    label->setFont(Theme::awesome()->font(Theme::toolIconFontSize));
    label->setStyleSheet("QLabel {color: " + Theme::white.name() + "}");
}

void Theme::initAwesomeMiniButton(QPushButton *button)
{
    button->setFont(Theme::awesome()->font(Theme::miniIconFontSize));
    button->setFixedSize(Theme::miniIconSize, Theme::miniIconSize);
    button->setFocusPolicy(Qt::NoFocus);
}

void Theme::updateAwesomeMiniButton(QPushButton *button, QChar icon, bool highlighted, bool enabled, bool unnormal)
{
    button->setText(icon);
    QColor color;
    bool needDesaturation = true;
    
    if (highlighted) {
        if (unnormal) {
            color = Theme::blue;
            needDesaturation = false;
        } else {
            color = Theme::white;
        }
    } else {
        color = QColor("#525252");
    }
    
    if (needDesaturation) {
        color = color.toHsv();
        color.setHsv(color.hue(), color.saturation() / 5, color.value() * 2 / 3);
        color = color.toRgb();
    }
    
    if (!enabled) {
        color = QColor(42, 42, 42);
    }

    button->setStyleSheet("QPushButton {border: none; background: none; color: " + color.name() + ";}");
}

void Theme::initAwesomeToolButtonWithoutFont(QPushButton *button)
{
    button->setFixedSize(Theme::toolIconSize * 0.75, Theme::toolIconSize * 0.75);
    button->setStyleSheet("QPushButton {color: " + Theme::white.name() + "}");
    button->setFocusPolicy(Qt::NoFocus);
}

void Theme::initAwesomeToolButton(QPushButton *button)
{
    button->setFont(Theme::awesome()->font(Theme::toolIconFontSize * 0.75));
    Theme::initAwesomeToolButtonWithoutFont(button);
}

void Theme::initToolButton(QPushButton *button)
{
    QFont font = button->font();
    font.setWeight(QFont::Light);
    font.setBold(false);
    button->setFont(font);
    button->setFixedHeight(Theme::toolIconSize * 0.75);
    button->setStyleSheet("QPushButton {color: " + Theme::white.name() + "}");
    button->setFocusPolicy(Qt::NoFocus);
}

void Theme::initCheckbox(QCheckBox *checkbox)
{
    QPalette palette = checkbox->palette();
    palette.setColor(QPalette::Background, Theme::white);
    checkbox->setPalette(palette);
}