/** \file menusystem.cc
   A very naive menusystem for the various settings screens
*/
/*
   Copyright (C) 2003-2004  Mathias Broxvall

   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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

#include "general.h"
#include "menusystem.h"
#include "glHelp.h"
#include "font.h"

#define MAX_MENUS  256

using namespace std;

typedef struct sSelectionArea {
  int x0, y0, x1, y1;
  int returnCode;
} SelectionArea;

int nSelectionAreas;
SelectionArea selectionAreas[MAX_MENUS];

void clearSelectionAreas() { nSelectionAreas=0; }
void addArea(int code,int x,int y,int w,int h) {
  int thisArea=nSelectionAreas++;
  SelectionArea *sarea=&selectionAreas[thisArea];
  sarea->x0 = x;
  sarea->x1 = x+w;
  sarea->y0 = y;
  sarea->y1 = y+w;
  sarea->returnCode=code;
}

void addText_Left(int code,int fontSize,int y0, const char *leftStr,int leftX) {
  if(nSelectionAreas >= MAX_MENUS) { printf("Error, too many menus active\n"); exit(1); }
  int width=Font::getTextWidth(0,leftStr,fontSize);
  int thisArea=nSelectionAreas++;
  SelectionArea *sarea=&selectionAreas[thisArea];
  sarea->x0 = leftX;
  sarea->x1 = leftX+width;
  sarea->y0 = y0-fontSize;
  sarea->y1 = y0+fontSize;
  sarea->returnCode=code;
  glColor4f(1.0,1.0,1.0,1.0);
  if(code && getSelectedArea() == code) 
	Font::drawSimpleText(0,leftStr,leftX,y0, fontSize, fontSize, 220/256.,220/256.,220/256.,1.);
  else
	Font::drawSimpleText(0,leftStr,leftX,y0, fontSize, fontSize, 220/256.,220/256.,64/256.,1.);
}
void addText_Right(int code,int fontSize,int y0, const char *rightStr,int rightX) {
  if(nSelectionAreas >= MAX_MENUS) { printf("Error, too many menus active\n"); exit(1); }
  int width=Font::getTextWidth(0,rightStr,fontSize);
  int thisArea=nSelectionAreas++;
  SelectionArea *sarea=&selectionAreas[thisArea];
  sarea->x0 = rightX-width;
  sarea->x1 = rightX;
  sarea->y0 = y0-fontSize;
  sarea->y1 = y0+fontSize;
  sarea->returnCode=code;
  glColor4f(1.0,1.0,1.0,1.0);
  if(code && getSelectedArea() == code) 
	Font::drawSimpleText(0,rightStr,rightX-width,y0, fontSize, fontSize, 220/256.,220/256.,220/256.,1.);
  else
	Font::drawSimpleText(0,rightStr,rightX-width,y0, fontSize, fontSize, 220/256.,220/256.,64/256.,1.);
}
void addText_Center(int code,int fontSize,int y0, const char *str,int cx) {
  if(nSelectionAreas >= MAX_MENUS) { printf("Error, too many menus active\n"); exit(1); }
  int width=Font::getTextWidth(0,str,fontSize);
  int thisArea=nSelectionAreas++;
  SelectionArea *sarea=&selectionAreas[thisArea];
  sarea->x0 = cx-width/2;
  sarea->x1 = cx+width/2;
  sarea->y0 = y0-fontSize;
  sarea->y1 = y0+fontSize;
  sarea->returnCode=code;
  glColor4f(1.0,1.0,1.0,1.0);
  if(code && getSelectedArea() == code) 
	Font::drawSimpleText(0,str,cx-width/2,y0, fontSize, fontSize, 220/256.,220/256.,220/256.,1.);
  else
	Font::drawSimpleText(0,str,cx-width/2,y0, fontSize, fontSize, 220/256.,220/256.,64/256.,1.);
}
void addText_LeftRight(int code,int fontSize,int y0, const char *leftStr,int leftX, const char *rightStr,int rightX) {
  if(nSelectionAreas >= MAX_MENUS) { printf("Error, too many menus active\n"); exit(1); }
  int widthL=Font::getTextWidth(0,leftStr,fontSize);
  int widthR=Font::getTextWidth(0,rightStr,fontSize);
  int thisArea=nSelectionAreas++;
  SelectionArea *sarea=&selectionAreas[thisArea];
  sarea->x0 = leftX;
  sarea->x1 = rightX;
  sarea->y0 = y0-fontSize;
  sarea->y1 = y0+fontSize;
  sarea->returnCode=code;
  glColor4f(1.0,1.0,1.0,1.0);
  if(code && getSelectedArea() == code) {
	Font::drawSimpleText(0,leftStr,leftX,y0, fontSize, fontSize, 220/256.,220/256.,220/256.,1.);
	Font::drawSimpleText(0,rightStr,rightX-widthR,y0, fontSize, fontSize, 220/256.,220/256.,220/256.,1.);
  } else {
	Font::drawSimpleText(0,leftStr,leftX,y0, fontSize, fontSize, 220/256.,220/256.,64/256.,1.);
	Font::drawSimpleText(0,rightStr,rightX-widthR,y0, fontSize, fontSize, 220/256.,220/256.,64/256.,1.);
  }
}

int getSelectedArea() {
  int mouseX,mouseY,i;
  SDL_GetMouseState(&mouseX,&mouseY);
  for(i=0;i<nSelectionAreas;i++) 
	if(mouseX >= selectionAreas[i].x0 &&
	   mouseX <= selectionAreas[i].x1 &&
	   mouseY >= selectionAreas[i].y0 &&
	   mouseY <= selectionAreas[i].y1)
	  return selectionAreas[i].returnCode;
  return 0;
}

int fontsize,screenBorder,top,menuSpacing;

void computeScreenSizes() {
  if(screenWidth <= 640) {
	fontsize=18;
	screenBorder=50;
	menuSpacing=fontsize+10;
	top=150;
  }
  else if(screenWidth == 800) {
	fontsize=20;
	screenBorder=75;
	menuSpacing=fontsize+14;
	top=180;
  }
  else if(screenWidth == 1024) {
	fontsize=24;
	screenBorder=100;
	menuSpacing=fontsize+18;
	top=200;
  }
  else if(screenWidth >= 1280) {
	fontsize=28;
	screenBorder=150;
	menuSpacing=fontsize+20;
	top=200;
  }
}

void menuItem_Left(int code,int row, const char *leftStr) {
  computeScreenSizes();
  addText_Left(code,fontsize,(row+1)*menuSpacing+top,leftStr,screenBorder);
}
void menuItem_Center(int code,int row, const char *str) {
  computeScreenSizes();
  addText_Center(code,fontsize,(row+1)*menuSpacing+top,str,screenWidth/2);
}
void menuItem_LeftRight(int code,int row,const char *leftStr,const char *rightStr) {
  computeScreenSizes();
  addText_LeftRight(code,fontsize,(row+1)*menuSpacing+top,leftStr,screenBorder,rightStr,screenWidth-screenBorder);
}