/*  author: S. M. Shahriar Nirjon
	last modified: August 8, 2008
*/



# include "iGraphics.h"
# include "gl.h"
#include<windows.h>

#define BALL_R 15
#define BALL_MOVEMENT 20
#define STICK_R 46//from the bmp pixel size

int g_ball_x=900, g_ball_y=450;//start from the center
int dx, dy;
int g_stick1_x=100+200,g_stick1_y=500,g_stick2_x=1700-200,g_stick2_y=500;

int draw_text=0;

int page_draw=0;//0 means start page, 1 means star play and 2 means settings
int draw_arrow=0;

void start_page()
{
    iSetColor(255,0,0);
    iText(10,10,"Press Right arrow on your selected choice");
    iShowBMP(600,250,"start_page.bmp");//(1800/2)-pixel_size_x(600)/2; 1000/2-pixel_size_y(500)/2;
    if(draw_arrow==0)iShowBMP(600+210,250+110,"arrow.bmp");
    if(draw_arrow==1)iShowBMP(600+185,250+50,"arrow.bmp");
}

void is_goal()
{
    if(g_ball_y>450 && g_ball_y<550 && g_ball_x-BALL_R-100<10)//should be in between 450 and 550
        draw_text=1;

    if(g_ball_y<550 && g_ball_y>450 && 1700-g_ball_x-BALL_R<10)//should be in between 450 and 550
        draw_text=1;
    else draw_text=0;
}
void ball_hit()
{
    dx=-dx;
    dy=-dy;
//    PlaySound((LPCSTR) "C:\\Users\\Teertho\\Desktop\\iGraphics Project\\iGraphics\\Hit.mp3", NULL, SND_FILENAME | SND_ASYNC);
}
void draw_field()
{
    iSetColor(255,255,255);
    //iRectangle(100,100,1600,800);
    iLine(100,450,100,100);
    iLine(100,550,100,900);
    iLine(100,100,1700,100);
    iLine(100,900,1700,900);
    iLine(1700,100,1700,450);
    iLine(1700,550,1700,900);
    //field stretches from point 100 to 1700 in x co-ordinate. and 100 to 900 in y co-ordinate
    iLine(900,900,900,100);//draws the middle line
    iCircle(900,500,100);//Draws the middle circle

    iSetColor(125,125,0);//Now comes the goal post
    iLine(1700,450,1700,550);
    iLine(100,450,100,550);
}


void ball()
{
    iSetColor(255,0,0);
    iFilledCircle(g_ball_x,g_ball_y,BALL_R);
    if((g_stick1_x-g_ball_x)*(g_stick1_x-g_ball_x)+(g_stick1_y-g_ball_y)*(g_stick1_y-g_ball_y)<=(STICK_R+BALL_R)*(STICK_R+BALL_R))
    {
        ball_hit();
    }

}

void draw_stick()
{
    iShowBMP(g_stick1_x-46,g_stick1_y-46,"stick1.bmp");
    iShowBMP(g_stick2_x-46,g_stick2_y-46,"stick2.bmp");
    //-46 was included as I recently had learnt that images are rendered to the x,y coordinate from the left-bottom corner. so it will now always render at the center of the coordinate
}

void draw_goal()
{
    iSetColor(255,255,255);
    iText(800,500,"Goal Scored!!!!!");
}

void iDraw()
{
    iClear();
    if(page_draw==0)start_page();
    else
    {
        if(draw_text==0) is_goal();
        if(draw_text==1) iShowBMP(0,0,"goal.bmp");
        else
        {
            //PlaySound("C:\Users\Teertho\Desktop\iGraphics Project\iGraphics\Hit.mp3", NULL, SND_FILENAME | SND_ASYNC);
            draw_field();
            draw_stick();
            ball();
        }
    }
}
/*
	function iMouseMove() is called when the user presses and drags the mouse.
	(mx, my) is the position where the mouse pointer is.
*/

void iMouseMove(int mx, int my)
{
    //place your codes here
}

void iMouse(int button, int state, int mx, int my)
{
    if(button == GLUT_LEFT_BUTTON && state == GLUT_DOWN);
    if(button == GLUT_RIGHT_BUTTON && state == GLUT_DOWN);
}

/*
	function iKeyboard() is called whenever the user hits a key in keyboard.
	key- holds the ASCII value of the key pressed.
*/
void iKeyboard(unsigned char key)
{
    if(key == 'p')
    {
        //do something with 'q'
        iPauseTimer(0);
    }
    if(key == 'r')
    {
        iResumeTimer(0);
    }
    if(key=='w' && g_stick1_y<900-STICK_R-15){g_stick1_y+=BALL_MOVEMENT;}//15 was added or substracted to avoid the ball crossing the field
    if(key=='s' && g_stick1_y>100+STICK_R+15){g_stick1_y-=BALL_MOVEMENT;}
    if(key=='a' && g_stick1_x>300+STICK_R){g_stick1_x-=BALL_MOVEMENT;}
    if(key=='d' && g_stick1_x<800-STICK_R){g_stick1_x+=BALL_MOVEMENT;}//don't want to access whole half field


}
/*
	function iSpecialKeyboard() is called whenver user hits special keys like-
	function keys, home, end, pg up, pg down, arraows etc. you have to use
	appropriate constants to detect them. A list is:
	GLUT_KEY_F1, GLUT_KEY_F2, GLUT_KEY_F3, GLUT_KEY_F4, GLUT_KEY_F5, GLUT_KEY_F6,
	GLUT_KEY_F7, GLUT_KEY_F8, GLUT_KEY_F9, GLUT_KEY_F10, GLUT_KEY_F11, GLUT_KEY_F12,
	GLUT_KEY_LEFT, GLUT_KEY_UP, GLUT_KEY_RIGHT, GLUT_KEY_DOWN, GLUT_KEY_PAGE UP,
	GLUT_KEY_PAGE DOWN, GLUT_KEY_HOME, GLUT_KEY_END, GLUT_KEY_INSERT
*/
void iSpecialKeyboard(unsigned char key)
{

    if(key == GLUT_KEY_END)
    {
        exit(0);
    }
    if(key==GLUT_KEY_UP)
    {
        if(page_draw==0&&draw_arrow==1)draw_arrow=0;
        else if(page_draw==1 && g_stick2_y<900-STICK_R-15)g_stick2_y+=BALL_MOVEMENT;
    }
    if(key==GLUT_KEY_DOWN)
    {
        if(page_draw==0&&draw_arrow==0)draw_arrow=1;
        else if(page_draw==1 && g_stick2_y>100+STICK_R+15)g_stick2_y-=BALL_MOVEMENT;
    }
    if(key==GLUT_KEY_LEFT)
    {
        if(page_draw==1 && g_stick2_x>1000+STICK_R)g_stick2_x-=BALL_MOVEMENT;
    }
    if(key==GLUT_KEY_RIGHT)
    {
        if(page_draw==0)page_draw=1;
        else if(page_draw==1 && g_stick2_x<1500-STICK_R)g_stick2_x+=BALL_MOVEMENT;
    }
}

void ballChange()
{
    g_ball_x += dx;
    g_ball_y += dy;

    if(g_ball_x > 1700-BALL_R || g_ball_x < 100+BALL_R)dx = -dx;
    if(g_ball_y > 900-BALL_R || g_ball_y < 100+BALL_R)dy = -dy;
}

int main()
{

    iSetTimer(3, ballChange);
    dx = 7;
    dy = 5;
    iInitialize(1800, 1000, "HIT TO WIN!!");

    return 0;
}