/*
 * (C) 2008 by dbt <info@dbox2-tuning.de>
 *
 * 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
 * (at your option) 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., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <global.h>
#include <neutrino.h>

#include "icons.h"
#include "progressbar.h"

#define ITEMW 4
#define POINT 2

#define RED    0xFF0000
#define GREEN  0x00FF00
#define YELLOW 0xFFFF00

CProgressBar::CProgressBar(const bool bl, const int w, const int h,
			   const int r, const int g, const int b, const bool inv)
{
	frameBuffer = CFrameBuffer::getInstance();
	font_pbar = SNeutrinoSettings::FONT_TYPE_INFOBAR_SMALL;
	// frame width around active bar
	frame_widht = 2;
	blink = bl;
	invert = inv;
	red = r;
	green = g;
	yellow = b;
	width = w;
	height = h;
	last_width = -1;
	bl_changed = g_settings.progressbar_color;
}

CProgressBar::~CProgressBar()
{
}

inline unsigned int make16color(__u32 rgb)
{
        return 0xFF000000 | rgb;
}

void CProgressBar::paintProgressBar (	const int pos_x,
					const int pos_y,
					const int pb_width,
					const int pb_height,
					const int value,
					const int max_value,
					const fb_pixel_t activebar_col,
					const fb_pixel_t passivebar_col,
					const fb_pixel_t backgroundbar_col,
					const fb_pixel_t shadowbar_col,
					const char *upper_labeltext,
					const uint8_t uppertext_col,
					const char *iconfile,
					bool paintZero)
{
	width = pb_width;
	height = pb_height;
	realpaint(pos_x, pos_y, value, max_value,
		  activebar_col, passivebar_col, backgroundbar_col, shadowbar_col,
		  upper_labeltext, uppertext_col, iconfile, paintZero);
}

void CProgressBar::paintProgressBar2(const int pos_x, 
				     const int pos_y,
				     const int value, 
				     const int max_value,
				     const fb_pixel_t activebar_col, 
				     const fb_pixel_t passivebar_col,
				     const fb_pixel_t frame_col, 
				     const fb_pixel_t shadowbar_col,
				     const char * upper_labeltext, 
				     const uint8_t uppertext_col,
				     const char * iconfile, 
				     bool paintZero)
{
	if (height < 0 || width < 0)
	{
		fprintf(stderr, "CProgressBar::paintProgressBar2 height or width not set!\n");
		return;
	}
	realpaint(pos_x, pos_y, value, max_value,
		  activebar_col, passivebar_col, frame_col, shadowbar_col,
		  upper_labeltext, uppertext_col, iconfile, paintZero);
}

void CProgressBar::realpaint(const int pos_x, const int pos_y,
			     const int value, const int max_value,
			     const fb_pixel_t activebar_col,
			     const fb_pixel_t passivebar_col,
			     const fb_pixel_t backgroundbar_col,
			     const fb_pixel_t shadowbar_col,
			     const char *upper_labeltext,
			     const uint8_t uppertext_col,
			     const char *iconfile,
			     bool paintZero)
{
	if(bl_changed != g_settings.progressbar_color) {
		bl_changed = g_settings.progressbar_color;
		reset();
	}
	// set colors
	fb_pixel_t active_col = activebar_col != 0 ? activebar_col : COL_INFOBAR_PLUS_7;
	fb_pixel_t passive_col = passivebar_col != 0 ? passivebar_col : COL_INFOBAR_PLUS_3;

	/* radius is 0 for now, since the rounded corner code is sufficiently
	   different from tuxbox.org's so that everything else looks 'strange' */
	const int c_rad = 0;

	/* if the bar is too small, do not draw the borders around it */
	if (height / 2 <= frame_widht || (blink && g_settings.progressbar_color) || backgroundbar_col == 0)
		frame_widht = 0;
	// get icon size
	int icon_w = 0, icon_h = 0;
	if(iconfile != NULL)
		frameBuffer->getIconSize(iconfile, &icon_w, &icon_h);

	// start positions x/y active bar
	int start_x = icon_w != 0 ? pos_x  + icon_w + 2*frame_widht : pos_x + frame_widht;
	int start_y = pos_y + frame_widht;

	// width active bar for current value
	int active_pb_width;
	if (max_value)
		active_pb_width = (width - icon_w - 2 * frame_widht) * value / max_value;
	else
		active_pb_width = 0;

	// max width active/passive bar
	int pb_max_width = icon_w != 0 ? (width - 2*frame_widht) - icon_w - frame_widht : width - 2*frame_widht;

	// max height progressbar bar, if icon height larger than pb_height then get height from icon
	int pb_max_height = icon_h > height ? icon_h + 2* frame_widht : height;

	if (!blink || !g_settings.progressbar_color)
	{
		// max height of active/passive bar
		int bar_height = pb_max_height - 2*frame_widht;

		int start_x_passive_bar = start_x + active_pb_width;
		int width_passive_bar = pb_max_width - active_pb_width;

		// shadow
		if (shadowbar_col != 0)
			frameBuffer->paintBoxRel(pos_x + SHADOW_OFFSET, pos_y + SHADOW_OFFSET,
						 width, pb_max_height, shadowbar_col, c_rad); // shadow

		// background = frame
		if (backgroundbar_col != 0) {
			// we must paint background as frame, because of flicker effects at screen on fast changing values
			frameBuffer->paintBoxRel(pos_x, pos_y, 10, pb_max_height, backgroundbar_col, c_rad, CORNER_LEFT);
			frameBuffer->paintBoxRel(pos_x + width - 10, pos_y, 10, pb_max_height, backgroundbar_col, c_rad, CORNER_RIGHT);
			frameBuffer->paintBoxRel(pos_x + 10, pos_y, width - 20, frame_widht, backgroundbar_col);
			frameBuffer->paintBoxRel(pos_x + 10, pos_y + pb_max_height - frame_widht, width - 20, frame_widht, backgroundbar_col);
		}

		frameBuffer->paintBoxRel(start_x,  start_y, active_pb_width, bar_height, active_col); // active bar
		frameBuffer->paintBoxRel(start_x_passive_bar, start_y, width_passive_bar, bar_height, passive_col); // passive bar
		if (paintZero && value == 0)
			frameBuffer->paintLine(pos_x+2 , pos_y+2, pos_x+width-3, pos_y+height-3, active_col); // zero line
	}
	else
	{
		/* red, yellow, green are given in percent */
		int rd = red * width / (100 * ITEMW);		/* how many POINTs red */
		int yw = yellow * width / (100 * ITEMW);	/* how many POINTs yellow */
		int gn = green * width / (100 * ITEMW);		/* how many POINTs green */

		int hcnt = height / ITEMW;		/* how many POINTs is the bar high */
		int maxi = active_pb_width / ITEMW;	/* how many POINTs is the active bar */
		int total = width / ITEMW;		/* total number of POINTs */

		int i, j;
		uint32_t rgb;
		fb_pixel_t color;
		int b = 0;

		if (last_width == -1 && backgroundbar_col != 0) /* first paint */
		{
			frameBuffer->paintBoxRel(pos_x, pos_y, width, pb_max_height, backgroundbar_col);
			if (shadowbar_col != 0)
				frameBuffer->paintBoxRel(pos_x + SHADOW_OFFSET, pos_y + SHADOW_OFFSET,
							 width, pb_max_height, shadowbar_col, c_rad); // shadow
		}

		if (active_pb_width != last_width) {
			int step;
			if (active_pb_width > last_width) {
				for (i = 0; (i < rd) && (i < maxi); i++) {
					step = 255 / rd;
					if (invert)
						rgb = GREEN + ((unsigned char)(step * i) << 16); // adding red
					else
						rgb = RED + ((unsigned char)(step * i) << 8); // adding green
					color = make16color(rgb);
					for(j = 0; j <= hcnt; j++)
						frameBuffer->paintBoxRel(pos_x + i * ITEMW, pos_y + j * ITEMW,
									 POINT, POINT, color);
				}
				for (; (i < yw) && (i < maxi); i++) {
					step = 255 / yw / 2;
					if (invert)
						rgb = YELLOW - ((unsigned char)(step * (b++)) << 8); // removing green
					else
						rgb = YELLOW - ((unsigned char)(step * (b++)) << 16); // removing red
					color = make16color(rgb);
					for(j = 0; j <= hcnt; j++)
						frameBuffer->paintBoxRel(pos_x + i * ITEMW, pos_y + j * ITEMW,
									 POINT, POINT, color);
				}
				for (; (i < gn) && (i < maxi); i++) {
					step = 255 / gn;
					if (invert)
						rgb = YELLOW - ((unsigned char) (step * (b++)) << 8); // removing green
					else
						rgb = YELLOW - ((unsigned char) (step * (b++)) << 16); // removing red
					color = make16color(rgb);
					for(j = 0; j <= hcnt; j++)
						frameBuffer->paintBoxRel(pos_x + i * ITEMW, pos_y + j * ITEMW,
									 POINT, POINT, color);
				}
			}
			for(i = maxi; i < total; i++) {
				for(j = 0; j <= hcnt; j++)
					frameBuffer->paintBoxRel(pos_x + i * ITEMW, pos_y + j * ITEMW,
								 POINT, POINT, COL_INFOBAR_PLUS_3);//fill passive
			}
			last_width = active_pb_width;
		}
	}

	// paint icon if present
	if (iconfile != NULL){
		int icon_y = pos_y + pb_max_height / 2 - icon_h / 2;
		frameBuffer->paintIcon(iconfile, pos_x + frame_widht, icon_y);
	}

	// upper text
	int upper_labeltext_y = start_y - frame_widht;
	if (upper_labeltext != NULL) {
		g_Font[font_pbar]->RenderString(start_x +2,
						upper_labeltext_y,
						width,
						upper_labeltext,
						uppertext_col != 0 ? uppertext_col : COL_INFOBAR,
						height,
						true); // UTF8
	}
}


void CProgressBar::paintProgressBarDefault(	const int pos_x,
						const int pos_y,
						const int pb_width,
						const int pb_height,
						const int value,
						const int max_value)
{
	paintProgressBar (pos_x, pos_y, pb_width, pb_height, value, max_value, 0, 0, COL_INFOBAR_SHADOW_PLUS_1, 0, "", 0);
}