#include <allegro.h>
#include <cmath>
#include <stdlib.h>
#include <time.h>				//these are the header files it inherits
#include <vector>
#include <string>
#include <sstream>
#include <iostream>

//this is how allegro draws stuff to the screen:
//    all objects have their own position            ->>>>       draw each objects bitmap to a 'back buffer'   this is so it doesn't draw to the screen before everything has been rendered
//                                                                                                              ->>>>> next it will draw this bitmap directly to the screen
//   if you don't do it this way your screen will just constantly be flashing every time an object is drawn to it




int setUpAllegro();

int main()
{
	setUpAllegro(); //calls the set up allegro function

	BITMAP *buffer;
	BITMAP *test;

	srand(time(NULL)); //initliases the random call

	test = load_bitmap("NAME.bmp", NULL);

	buffer = create_bitmap(SCREEN_W, SCREEN_H); //creates the buffer to stop screen flicker


	while (!key[KEY_ESC])		//this is the main game loop where all the different game functions will occur
	{
		clear_to_color(buffer, 0); //clears the buffer to colour black

		masked_blit(test, buffer, 0, 0, mouse_x, mouse_y, 32, 32);    //this function draws the bitmap image to the back buffer where the mouse position is. The 32 values are the size of the bitmap;

		//mouse_x is mouse x position
		//mouse_y is mouse y position
		//mouse_b & 1 is left click
		//mouse_b & 2 is right click
		//key[KEY_W] gets if the w key is pressed

		int bitmapX, bitmapY;

		//for example

		if(key[KEY_W])
		{
			bitmapX += 1;
			blit(test, buffer, 0, 0, bitmapX, bitmapY, 10, 10);    //this will basivcally draw a bitmap to the screen if the key w is pressed. It will draw the bitmap at the bitmapX&Y positions. As it is not masked blit it will not remove any magenta on the bitmap. 10, 10 is the size of the bitmap.

		}

		//key[KEY_UP]     -- this is for the up arrow



		//once you have blit or masked blit or the objects you want to display on the screen then you:

		blit(buffer, screen, 0, 0, 0, 0, SCREEn_W, SCREEN_H);  //this draws the back buffer to the screen



	}
	allegro_exit(); //exits allegro
	return 0;
}

END_OF_MAIN();

int setUpAllegro() //sets up allegro
{
	int retval = 0;
	int ret;

	set_color_depth(32);

	if (allegro_init() != 0)
	{
		retval = -1;
	}

	else
	{
		install_keyboard();
		install_timer();  //installs the required functions
		install_mouse();
		install_sound(DIGI_AUTODETECT,  MIDI_AUTODETECT, "A");
		ret = set_gfx_mode(GFX_AUTODETECT_WINDOWED, 880, 600, 0, 0);
		if (ret != 0)
		{
			allegro_message(allegro_error);
			retval = -2;
		}
		else
		{
			textprintf(screen, font, 0, 0, makecol(255, 255, 255), "%dx%d", SCREEN_W, SCREEN_H);

		}
	}
	return retval;
}