/*
* COMP1917: Computing 1
* Assignment 2: Image Processing using Quadtrees
* File: hw2.c
* Written by: Alan Blair
*/

// System include files
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>

// Local include files
#include "quadtree.h"

// Constants
#define MAXLENGTH    200


// Main function
int main( void ) {
	char command[MAXLENGTH];
	char c;
	QTnode *qt;
	int dim;
	char *filename;
	int count = 0;
	QTnode *current;



	/********************************************************************
	* YOU WILL NEED TO COMPLETE THE FOLLOWING SECTION FOR STAGES 2 - 5 *
	*******************************************************************/

	printPrompt();

	while( fgets( command, MAXLENGTH, stdin ) != NULL ) {

		int  imgNum;
		char *p;



		if(( p=strrchr( command, '\n')) != NULL ) {
			*p = '\0'; // remove '\n' at end of line
		}
		// find the first non-space character in the command
		/*
		while(isspace(*command)) {
			printf("inside while isspace \n");
			command++;
		}
		*/

		p = strtok (command," ");
		if (p != NULL) {

			filename = strtok (NULL, " ");
		}






		c = tolower(*p);

		if( isdigit(c)) {
			if( sscanf( command, "%d", &imgNum ) == 1 ) {

				// INSERT CODE FOR <k> COMMAND
			}
		}
		else switch( c ) {

		case 'h': // help

			printf(" A - Add image\n" );
			printf(" I - Index\n" );
			printf(" P - Print image\n" );
			printf(" F - Forward\n" );
			printf(" B - Back\n" );
			printf("<k>- make image number k the current image\n");
			printf(" D - Delete image\n" );
			printf(" L - Look for image\n" );
			printf(" R - Rotate image counterclockwise\n" );
			printf(" M - Mirror image (reflect vertically)\n" );
			printf("NE - zoom into North East corner\n" );
			printf("NW - zoom into North West corner\n" );
			printf("SW - zoom into South West corner\n" );
			printf("SE - zoom into South East corner\n" );
			printf(" O - zoom Out\n" );
			printf(" U - Undo\n" );
			printf(" H - Help\n" );
			printf(" Q - Quit\n" );
			break;

			// INSERT CODE FOR OTHER COMMANDS

		case 'a': // Add image

			if(filename != NULL) {
				qt = getImage(filename, &dim);
				current = qt;
				count++;
				printf("*%d [%d] %s \n", count, dim, filename);
			}
			break;

		case 'p': //Print Image

			printImage(qt, dim);
			break;

		case 'w'://zoom NE corner
			printImage(current->ne, dim);
			current = current->ne;
			break;

		case 'x'://zoom NW corner
			printImage(current->nw, dim);
			current = current->nw;
			break;

		case 'y'://zoom SW corner
			printImage(current->sw, dim);
			current = current->sw;
			break;

		case 'z'://zoom SE corner
			printImage(current->se, dim);
			current = current->se;
			break;




		case 'q': // quit program
			printf("Bye!\n");
			return 0;
			break;

		default:
			printf("Unrecognized command: %s\n", command );
			break;
		}

		printPrompt();
	}

	return 0;
}