#ifndef _GAME_H
#define _GAME_H

#include "ships.h"
/** 
* Ship Info Descriptor - High Level Description of Ships, including the type, 
* position, velocity, life and other flags.
*/ 
typedef struct {
  char type;                 // Ship Type.
  char xpix, ypix, theta;    // current x, y and rotational positions.
  char xfrac, yfrac;	     // current fractional x and y position
  signed int vx, vy;         // current x and y velocities.
  char accel;                // current acceleration ON or OFF (1 or 0)     
  signed int life;           // remaining life of ship.
  unsigned int fireDelay1;   // delay left to fire weapon 1
  unsigned int fireDelay2;   // delay for fire weap 2
  char theta;                // direction
  char W1type;	             //weapon 1 type (preloaded for easy access)
  char W2type;               //weapon 2 type
  char _flags;               // Miscellaneous flags.   	
  char boostcount;	     //booster counter

  //bullet stuff
  char activebullets;        //number of active bullets; needs to be less than maxbullets
  char BulletType[MAX_BULLETS];
  char BulletPosX[MAX_BULLETS];
  char BulletPosY[MAX_BULLETS];
  char BulletXFrac[MAX_BULLETS];
  char BulletYFrac[MAX_BULLETS];
  char BulletDirection[MAX_BULLETS];
  char BulletActive[MAX_BULLETS];
  char BulletLife[MAX_BULLETS];
  char explodeActive[MAX_BULLETS];
  char explodeLife[MAX_BULLETS];
  char explodeX[MAX_BULLETS]; 
  char explodeY[MAX_BULLETS];
}ShipInfoDesc;

/**
* Player Info Descriptor - High Level Description of Players, including the 
* current score, selected ship type, ready bit and various other flags.
*/
typedef struct {
  ShipInfoDesc* ship;          // Ship Info that the user selected.
}PlayerInfoDesc;

typedef enum {
  GM_TITLE,              // Title Selection Menu.
  GM_GAME,               // Game Mode
  GM_GAMEOVER			// Handle the Game Over Sequence
}GameState;


// Method Signatures

// Initialize the port and interrupt settings of the game.
void initialize();
// Initialize the ships 
void initializeShips();
// Decode the commands from user 1 (gamepad)
void acquireCommandsP1(ShipInfoDesc* ship);
// Decode the commands from user 2 (gamepad)
void acquireCommandsP2(ShipInfoDesc* ship);
//update bullet positions and life
void deactBullets(ShipInfoDesc* ship);

// Renders Ships
void renderShip();
// Draws Bullets for given ship
void  drawBullets(ShipInfoDesc* ship, char player);
// Draw Explosions onto screen for given ship.
void  drawExplosions(ShipInfoDesc* ship);
// Returns the square of the distance between two given points
unsigned int distanceSQ(char x1, char y1, char x2, char y2); 
// Triggers zoom mode, if appropriate
void checkZoom (ShipInfoDesc* ship1, ShipInfoDesc* ship2);    
// Collision Detection.
void hitOpponent(ShipInfoDesc* shipmain, ShipInfoDesc* shiptarg);
#endif