/*
 *  The ManaPlus Client
 *  Copyright (C) 2006-2009  The Mana World Development Team
 *  Copyright (C) 2009-2010  The Mana Developers
 *  Copyright (C) 2011-2019  The ManaPlus Developers
 *  Copyright (C) 2019-2021  Andrei Karas
 *
 *  This file is part of The ManaPlus Client.
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "gui/widgets/textpreview.h"

#include "settings.h"

#include "gui/gui.h"
#include "gui/skin.h"

#include "gui/fonts/font.h"

#include "render/graphics.h"

#include "debug.h"

int TextPreview::instances = 0;
float TextPreview::mAlpha = 1.0;
Skin *TextPreview::mSkin = nullptr;

TextPreview::TextPreview(const Widget2 *const widget,
                         const std::string &text) :
    Widget(widget),
    mFont(gui->getFont()),
    mText(text),
    mTextColor(&getThemeColor(ThemeColorId::TEXT, 255U)),
    mTextColor2(&getThemeColor(ThemeColorId::TEXT_OUTLINE, 255U)),
    mBGColor(&getThemeColor(ThemeColorId::BACKGROUND, 255U)),
    mTextBGColor(nullptr),
    mPadding(0),
    mTextAlpha(false),
    mOpaque(Opaque_false),
    mShadow(false),
    mOutline(false)
{
    mAllowLogic = false;
    if (instances == 0)
    {
        if (theme != nullptr)
        {
            mSkin = theme->load("textpreview.xml",
                "",
                true,
                Theme::getThemePath());
        }
    }

    instances++;

    if (mSkin != nullptr)
        mPadding = mSkin->getOption("padding", 0);

    adjustSize();
}

TextPreview::~TextPreview()
{
    if (gui != nullptr)
        gui->removeDragged(this);

    instances--;

    if (instances == 0)
    {
        if (theme != nullptr)
            theme->unload(mSkin);
    }
}

void TextPreview::draw(Graphics *const graphics)
{
    if (mFont == nullptr)
        return;

    BLOCK_START("TextPreview::draw")
    if (settings.guiAlpha != mAlpha)
        mAlpha = settings.guiAlpha;

    const int intAlpha = CAST_S32(mAlpha * 255.0F);
    const int alpha = mTextAlpha ? intAlpha : 255;

    if (mOpaque == Opaque_true)
    {
        graphics->setColor(Color(CAST_S32(mBGColor->r),
                    CAST_S32(mBGColor->g),
                    CAST_S32(mBGColor->b),
                    CAST_S32(mAlpha * 255.0F)));
        graphics->fillRectangle(Rect(0, 0,
            mDimension.width, mDimension.height));
    }

    if (mTextBGColor != nullptr)
    {
        const int x = mFont->getWidth(mText) + 1
            + 2 * ((mOutline || mShadow) ? 1 :0);
        const int y = mFont->getHeight() + 1
            + 2 * ((mOutline || mShadow) ? 1 : 0);
        graphics->setColor(Color(CAST_S32(mTextBGColor->r),
            CAST_S32(mTextBGColor->g),
            CAST_S32(mTextBGColor->b),
            intAlpha));
        graphics->fillRectangle(Rect(mPadding, mPadding, x, y));
    }

    Color color1(mTextColor->r, mTextColor->g, mTextColor->b, alpha);

    if (mOutline && mTextColor != mTextColor2)
    {
        const Color &color2 = getThemeColor(ThemeColorId::OUTLINE, 255U);
        mFont->drawString(graphics,
            color1,
            color2,
            mText,
            mPadding + 1, mPadding + 1);
    }
    else
    {
        Color color2(mTextColor2->r, mTextColor2->g, mTextColor2->b, alpha);
        mFont->drawString(graphics,
            color1,
            color2,
            mText,
            mPadding + 1, mPadding + 1);
    }

    BLOCK_END("TextPreview::draw")
}

void TextPreview::safeDraw(Graphics *const graphics)
{
    TextPreview::draw(graphics);
}

void TextPreview::adjustSize()
{
    setHeight(getFont()->getHeight() + 2 * mPadding);
}
