/* HARRY GOES HOME
	By Stephen Smith (stevo@REMOVE-THIScarlyle-smith.demon.co.uk)
	Based on the Spectrum Game of the same name
*/

#include "stdio.h"
#include "conio.h"
#include "stdlib.h"
#include "time.h"

// Prototypes
void setmap(void);
void minecheck(void);
void showmines(void);

// variables
int map[31][21];
int x,y,z; // reusable variable
int hx,hy; //Harry's cords
int diflevel; // Difficulty level
int gotkey;

void main(void)
{
	clrscr();
	randomize();
	printf("Harry Goes Home by Stephen Smith (stevo@REMOVE-THIScarlyle-smith.demon.co.uk)\n\n");
	printf("Please enter the difficulty level.\nThe lower the number, the harder it will be.\n");
	scanf("%d",&diflevel);
	setmap();
	do {
		minecheck();
		x = getch();
		gotoxy(hx+1,hy+1);
		printf("+");
		if(x == 'q' && hy>1) { hy--; }
		if(x == 'a' && hy<20) { hy++; }
		if(x == 'o' && hx>1) { hx--; }
		if(x == 'p' && hx<30) { hx++; }
		gotoxy(hx+1,hy+1);
		printf("&");
		if (map[hx][hy] == 2) {
			gotkey=1;
			gotoxy(3,25);
			printf("You've got the key!");
		}
		if (map[hx][hy] == 1) {
			gotoxy(3,25);
			printf("You just walked into a mine!");
			showmines();
			exit(0);
		}
	} while (map[hx][hy]!=3 || gotkey==0);
	gotoxy(3,25);
	printf("You've completed the game!");
	showmines();
	exit(0);
}

void minecheck(void)
{
	z=0;
	for(y=hy-1 ; y<hy+2 ; y++) {
		for(x=hx-1 ; x<hx+2 ; x++) {
			if (y>0 && y<21 && x>0 && x<31) {
				if (x!=hx && y!=hy) {}
				else {
					if (map[x][y]==1) { z++; }
				}
			}
		}
	}
	gotoxy(3,24);
	printf("There are %d mines next to you.",z);
}

void setmap(void)
{
	for(y=1 ; y<21 ; y++) {
		for(x=1 ; x<31 ; x++) {
			z = random(diflevel);
			if(z == 0) {
				map[x][y] = 1; // mine
			}
			else {
				map[x][y] = 0; // no mine
			}
		}
	}

	map[random(31)][1] = 3; //the house
	map[random(20)+5][random(10)+5] = 2; //the key

	hx = random(20)+5;
	hy = 20;
	map[hx][hy] = 0;
	gotkey=0;

	clrscr();
	gotoxy(1,1);
	printf("--------------------------------");
	gotoxy(1,22);
	printf("--------------------------------");
	for(y=2 ; y<22 ; y++) {
		gotoxy(1,y);
		printf("|                              |");
	}

	for(y=1 ; y<21 ; y++) {
		for(x=1 ; x<31 ; x++) {
			gotoxy(x+1,y+1);
			switch(map[x][y]) {
				case 0: printf(" "); break; //nothing
				case 1: printf(" "); break; //mine
				case 2: printf("K"); break; //key
				case 3: printf("H"); break; //house
				default: printf(" "); break;
			}
		}
	}
	gotoxy(hx+1,hy+1);
	printf("&");

	gotoxy(35,1);
	printf("Harry Goes Home");
	gotoxy(35,2);
	printf("By Stephen Smith (stevo@REMOVE-THIScarlyle-smith.demon.co.uk)");
	gotoxy(35,4);
	printf("Use qaop to move your man '&' to get the");
	gotoxy(35,5);
	printf("key 'K' and then to his home 'H'.  Nuff said.");
	gotoxy(35,7);
	printf("Oh yeah, avoid the mines!");
}

void showmines(void)
{
	for(y=1 ; y<21 ; y++) {
		for(x=1 ; x<31 ; x++) {
			gotoxy(x+1,y+1);
			switch(map[x][y]) {
				case 1: printf("m"); break; //mine
				default: printf(""); break;
			}
		}
	}
}