/*
 *  The Mana World
 *  Copyright 2004 The Mana World Development Team
 *
 *  This file is part of The Mana World.
 *
 *  The Mana World 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.
 *
 *  The Mana World 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 The Mana World; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 *  $Id$
 */

#include "browserbox.h"
#include "gui.h"

int BrowserBox::instances = 0;
gcn::ImageFont* BrowserBox::browserFont;

BrowserBox::BrowserBox(unsigned int mode):
    gcn::Widget()
{
    mMode = mode;
    setOpaque(true);
    setHighlightMode(BOTH);
    mSelectedLink = -1;
    setFocusable(true);
    addMouseListener(this);
    
    if (instances == 0)
    {
#ifdef USE_OPENGL
        browserFont = new gcn::ImageFont(
                TMW_DATADIR "data/graphics/gui/browserfont.png",
                " abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567"
                "89:@!\"$%&/=?^+*#[]{}()<>_;'.,\\|-~`");
#else
        browserFont = gui->getFont();
#endif
    }
    instances++;
}

BrowserBox::~BrowserBox()
{
    instances--;
    if (instances == 0)
    {
        // Clean up static resource font
        delete browserFont;
    }
}

void BrowserBox::setLinkHandler(LinkHandler* linkHandler)
{
    mLinkHandler = linkHandler;
}

void BrowserBox::setOpaque(bool opaque)
{
    mOpaque = opaque;
}

void BrowserBox::setHighlightMode(unsigned int highMode)
{
    mHighMode = highMode;
}

void BrowserBox::addRow(const std::string& row)
{
    std::string tmp = row;
    std::string newRow;
    BROWSER_LINK bLink;
    int idx1, idx2, idx3;

    // Check for links in format "@@link|Caption@@"
    idx1 = tmp.find("@@");
    while (idx1 >= 0)
    {
        idx2 = tmp.find("|", idx1);
        idx3 = tmp.find("@@", idx2);
        bLink.link = tmp.substr(idx1 + 2, idx2 - (idx1 + 2));
        bLink.caption = tmp.substr(idx2 + 1, idx3 - (idx2 + 1));
        bLink.y1 = mTextRows.size() * browserFont->getHeight();
        bLink.y2 = bLink.y1 + browserFont->getHeight();
        
        newRow += tmp.substr(0, idx1);

        std::string tmp2 = newRow;
        idx1 = tmp2.find("##");
        while (idx1 >= 0)
        {
            tmp2.erase(idx1, 3);                    
            idx1 = tmp2.find("##");
        }
        bLink.x1 = browserFont->getWidth(tmp2) - 1;
        bLink.x2 = bLink.x1 + browserFont->getWidth(bLink.caption) + 1;
        
        mLinks.push_back(bLink);
        
        newRow += "##L" + bLink.caption;

        tmp.erase(0, idx3 + 2);
        if(tmp != "")
        {
            newRow += "##P";
        }        
        idx1 = tmp.find("@@");
    }

    newRow += tmp;
    mTextRows.push_back(newRow);
    
    // Auto size mode
    if (mMode == AUTO_SIZE)
    {
        std::string plain = newRow;
        for (idx1 = plain.find("##"); idx1 >= 0; idx1 = plain.find("##"))
            plain.erase(idx1, 3);

        // Adjust the BrowserBox size
        int w = browserFont->getWidth(plain);
        if (w > getWidth())
            setWidth(w);
    }
    setHeight(browserFont->getHeight() * mTextRows.size());
}

void BrowserBox::clearRows()
{
    mTextRows.clear();
    mLinks.clear();
    setWidth(0);
    mSelectedLink = -1;
}

void BrowserBox::mousePress(int mx, int my, int button)
{
    if ((button == gcn::MouseInput::LEFT) && mLinkHandler)
    {        
        for (unsigned int i = 0; i < mLinks.size(); i++)
        {
            if ((mx >= mLinks[i].x1) && (mx < mLinks[i].x2) &&
                    (my > mLinks[i].y1) && (my < mLinks[i].y2))
            {
                mLinkHandler->handleLink(mLinks[i].link);
                return;
            }
        }
    }
}

void BrowserBox::mouseMotion(int mx, int my)
{
    for (unsigned int i = 0; i < mLinks.size(); i++)
    {
        if ((mx >= mLinks[i].x1) && (mx < mLinks[i].x2) &&
                (my > mLinks[i].y1) && (my < mLinks[i].y2))
        {
            mSelectedLink = (int) i;
            return;
        }
        else
        {
            mSelectedLink = -1;
        }
    }
}

void BrowserBox::draw(gcn::Graphics* graphics)
{
    if (mOpaque)
    {
        graphics->setColor(gcn::Color(BGCOLOR));    
        graphics->fillRectangle(gcn::Rectangle(0, 0, getWidth(), getHeight()));
    }
    
    if (mSelectedLink >= 0)
    {
        if ((mHighMode == BACKGROUND) || (mHighMode == BOTH))
        {
            graphics->setColor(gcn::Color(HIGHLIGHT));    
            graphics->fillRectangle(gcn::Rectangle(
                        mLinks[mSelectedLink].x1,
                        mLinks[mSelectedLink].y1,
                        mLinks[mSelectedLink].x2 - mLinks[mSelectedLink].x1,
                        mLinks[mSelectedLink].y2 - mLinks[mSelectedLink].y1));
        }

        if ((mHighMode == UNDERLINE) || (mHighMode == BOTH))
        {
            graphics->setColor(gcn::Color(LINK));    
            graphics->drawLine(
                        mLinks[mSelectedLink].x1,
                        mLinks[mSelectedLink].y2,
                        mLinks[mSelectedLink].x2,
                        mLinks[mSelectedLink].y2);
        }
    }

    unsigned int i, j;
    int x = 0, y = 0;
    int wrappedLines = 0;
    for (i = 0; i < mTextRows.size(); i++)
    {
        int selColor = BLACK;
        int prevColor = selColor;
        std::string row = mTextRows[i];
        x = 0;

        for (j = 0; j < row.size(); j++)
        {
            // Check for color change in format "##x", x = [L,P,0..9]
            if ((row.at(j) == '#') && (row.at(j + 1) == '#'))
            {
                switch (row.at(j + 2))
                {
                    case 'L': // Link color
                        prevColor = selColor;
                        selColor = LINK;
                        break;
                    case 'P': // Previous color
                        selColor = prevColor;
                        break;
                    case '1':
                        prevColor = selColor;
                        selColor = RED;
                        break;
                    case '2':
                        prevColor = selColor;
                        selColor = GREEN;
                        break;
                    case '3':
                        prevColor = selColor;
                        selColor = BLUE;
                        break;
                    case '4':
                        prevColor = selColor;
                        selColor = ORANGE;
                        break;
                    case '5':
                        prevColor = selColor;
                        selColor = YELLOW;
                        break;
                    case '6':
                        prevColor = selColor;
                        selColor = PINK;
                        break;
                    case '7':
                        prevColor = selColor;
                        selColor = PURPLE;
                        break;
                    case '8':
                        prevColor = selColor;
                        selColor = GRAY;
                        break;
                    case '9':
                        prevColor = selColor;
                        selColor = BROWN;
                        break;
                    case '0':
                    default:
                        prevColor = selColor;
                        selColor = BLACK;
                }
                j += 3;

                if (j == row.size())
                {
                    break;
                }
            }
            graphics->setColor(gcn::Color(selColor));

            // Check for line separators in format "---"
            if ((j <= 3) && (row.at(j) == '-') && (row.at(j + 1) == '-') &&
                    (row.at(j + 2) == '-'))
            {
                for (x = 0; x < getWidth(); x++)
                {
                    browserFont->drawGlyph(graphics, '-', x, y);
                    x += browserFont->getWidth('-') - 2;
                }
                break;
            }
            // Draw each char
            else
            {
                browserFont->drawGlyph(graphics, row.at(j), x, y);
                x += browserFont->getWidth(row.at(j));

                // Auto wrap mode
                if (mMode == AUTO_WRAP)
                {
                    /** NOTE (by Javila): this is just a simple example and
                     *  will force text wrap at widget width!!!
                     *  Maybe it can need improvements.
                     */
                    if ((x + 2 * browserFont->getWidth('~')) > getWidth())
                    {
                        browserFont->drawGlyph(graphics, '~', 
                                getWidth() - browserFont->getWidth('~'), y);
                        x = 15; // Ident in new line
                        y += browserFont->getHeight();
                        wrappedLines++;
                    }
                }
            }
        }
        y += browserFont->getHeight();
        setHeight((mTextRows.size() + wrappedLines) * browserFont->getHeight());
    }
}