#include "screen.h"

#include <fstream.h>
#include <string.h>
#include <stdlib.h>

const int BUFLENGTH = 80;
const int CMDLENGTH = 10;

void fatalError( char msg[] )
{
	cerr << msg << endl;
	exit( -1 );
}

/* readChar expects to read in something of the form 'c' where c is some
 * arbitrary character. it ignores all characters before the first '
 */
char readChar( istream& is )
{
	char ch;
	char ret;

	while( is.get( ch ) && (ch != '\'') );

	if( !is ) {
		fatalError( "Bad char" );
	}

	is.get( ret );
	is.get( ch );

	if( ch != '\'' ) {
		fatalError( "Bad char" );
	}

	return ret;
}

/* readText reads in text of the form "text" where text is some arbitrary 
 * character string
 */
bool readText( istream& is, char buf[] )
{
	char ch;
	int idx = 0;

	while( is.get( ch ) && (ch != '"') );
	while( is.get( ch ) ) {
		if( ch == '"' ) {
		        buf[idx] = '\0';
			return true;
		} else {
			buf[ idx++ ] = ch;
		}
	}

	return false;
}

int main( void )
{
	char cmd[ CMDLENGTH ];
	int col, row, width, height;
	char fill;
	char ch;
	Screen screen;

	while( cin >> cmd )
	{
		if( strcmp( cmd, "fill" ) == 0 ) {
			fill = readChar( cin );
			screen.fill( fill );	
		} else if( strcmp( cmd, "hline" ) == 0 ) {
			cin >> col >> row >> width;
			fill = readChar( cin );
			if( !screen.horizontalLine( col, row, width, fill ) ) {
				cerr << "Error." << endl;
			}
		} else if( strcmp( cmd, "vline" ) == 0 ) {
		// insert implementation here
		// should be implemented using readChar
		} else if( strcmp( cmd, "rectangle" ) == 0 ) {
		// insert implementation here
		// should be implemented using readChar
		} else if( strcmp( cmd, "text" ) == 0 ) {
		// insert implementation here
		// should be implemented using readText
		} else if( strcmp( cmd, "ctext" ) == 0 ) {
		// insert implementation here
		// should be implemented using readText
		} else if( strcmp( cmd, "load" ) == 0 ) {
		// insert implementation here
		} else if( strcmp( cmd, "save" ) == 0 ) {
		// insert implementation here
		} else if( strcmp( cmd, "print" ) == 0 ) {
		// insert implementation here
		} else if( strcmp( cmd, "quit" ) == 0 ) {
		// insert implementation here
		} else {
		// insert implementation here
		}
	}

	return 0;
}