/*
 *  The Mana World
 *  Copyright (C) 2004  The Mana World Development Team
 *
 *  This file is part of The Mana World.
 *
 *  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, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include <guichan/font.hpp>

#include "gui.h"
#include "palette.h"
#include "progressbar.h"
#include "textrenderer.h"

#include "../configuration.h"
#include "../graphics.h"

#include "../resources/image.h"
#include "../resources/resourcemanager.h"

ImageRect ProgressBar::mBorder;
int ProgressBar::mInstances = 0;
float ProgressBar::mAlpha = 1.0;

ProgressBar::ProgressBar(float progress,
                         unsigned int width, unsigned int height,
                         Uint8 red, Uint8 green, Uint8 blue):
    gcn::Widget(),
    mRed(red), mGreen(green), mBlue(blue),
    mRedToGo(red), mGreenToGo(green), mBlueToGo(blue)
{
    mProgressToGo = mProgress = 0.0f;
    mSmoothProgress = mSmoothColorChange = true;

    setProgress(progress);
    setWidth(width);
    setHeight(height);

    if (mInstances == 0)
    {
        ResourceManager *resman = ResourceManager::getInstance();
        Image *dBorders = resman->getImage("graphics/gui/vscroll_grey.png");
        mBorder.grid[0] = dBorders->getSubImage(0, 0, 4, 4);
        mBorder.grid[1] = dBorders->getSubImage(4, 0, 3, 4);
        mBorder.grid[2] = dBorders->getSubImage(7, 0, 4, 4);
        mBorder.grid[3] = dBorders->getSubImage(0, 4, 4, 10);
        mBorder.grid[4] = resman->getImage("graphics/gui/bg_quad_dis.png");
        mBorder.grid[5] = dBorders->getSubImage(7, 4, 4, 10);
        mBorder.grid[6] = dBorders->getSubImage(0, 15, 4, 4);
        mBorder.grid[7] = dBorders->getSubImage(4, 15, 3, 4);
        mBorder.grid[8] = dBorders->getSubImage(7, 15, 4, 4);

        for (int i = 0; i < 9; i++)
        {
            mBorder.grid[i]->setAlpha(mAlpha);
        }

        dBorders->decRef();
    }

    mInstances++;
}

ProgressBar::~ProgressBar()
{
    mInstances--;

    if (mInstances == 0)
    {
        delete mBorder.grid[0];
        delete mBorder.grid[1];
        delete mBorder.grid[2];
        delete mBorder.grid[3];
        mBorder.grid[4]->decRef();
        delete mBorder.grid[5];
        delete mBorder.grid[6];
        delete mBorder.grid[7];
        delete mBorder.grid[8];
    }
}

void ProgressBar::logic()
{
    if (mSmoothColorChange)
    {
        // Smoothly changing the color for a nicer effect.
        if (mRedToGo > mRed) mRed++;
        if (mRedToGo < mRed) mRed--;
        if (mGreenToGo > mGreen) mGreen++;
        if (mGreenToGo < mGreen) mGreen--;
        if (mBlueToGo > mBlue) mBlue++;
        if (mBlueToGo < mBlue) mBlue--;
    }
    else
    {
        mRed = mRedToGo;
        mGreen = mGreenToGo;
        mBlue = mBlueToGo;
    }

    if (mSmoothProgress)
    {
        // Smoothly showing the progressbar changes.
        if (mProgressToGo > mProgress) mProgress = mProgress + 0.005f;
        if (mProgressToGo < mProgress) mProgress = mProgress - 0.005f;
    }
    else
        mProgress = mProgressToGo;
}

void ProgressBar::draw(gcn::Graphics *graphics)
{
    if (config.getValue("guialpha", 0.8) != mAlpha)
    {
        mAlpha = config.getValue("guialpha", 0.8);
        for (int i = 0; i < 9; i++)
        {
            mBorder.grid[i]->setAlpha(mAlpha);
        }
    }

    static_cast<Graphics*>(graphics)->
        drawImageRect(0, 0, getWidth(), getHeight(), mBorder);

    const int alpha = (int)(mAlpha * 255.0f);

    // The bar
    if (mProgress > 0)
    {
        graphics->setColor(gcn::Color(mRed, mGreen, mBlue, alpha));
        graphics->fillRectangle(gcn::Rectangle(4, 4,
                               (int) (mProgress * (getWidth() - 8)),
                                getHeight() - 8));
    }

    // The label
    if (!mText.empty())
    {
        const int textX = getWidth() / 2;
        const int textY = (getHeight() - boldFont->getHeight()) / 2;

        TextRenderer::renderText(graphics, mText, textX, textY,
                                 gcn::Graphics::CENTER,
                                 guiPalette->getColor(Palette::PROGRESS_BAR,
                                 alpha), boldFont, true, false);
    }
}

void ProgressBar::setProgress(float progress)
{
    if (progress < 0.0f) mProgressToGo = 0.0;
    else if (progress > 1.0f) mProgressToGo = 1.0;
    else mProgressToGo = progress;
}

void ProgressBar::setColor(Uint8 red, Uint8 green, Uint8 blue)
{
    mRedToGo = red;
    mGreenToGo = green;
    mBlueToGo = blue;
}