#import <Cocoa/Cocoa.h>
// compiled with: gcc -std=gnu99 -fobjc-exceptions -o dialog -framework Cocoa dialog.m

int main(int argc, const char *argv[]) {
	if (argc<2) {
		printf( "Usage: dialog [filename] (interviewer voice) (guest voice)\n" );
		exit( 1 );
	}

	NSAutoreleasePool *pool = [NSAutoreleasePool new];
	NSString *guestVoice, *interviewerVoice;
	NSMutableString *currentVoice = [NSMutableString new];

	interviewerVoice = ( argc > 2 ? [NSString stringWithUTF8String:argv[2]] : @"Victoria" );
	guestVoice = ( argc > 3 ? [NSString stringWithUTF8String:argv[3]] : @"Bruce" );

	NSSpeechSynthesizer *interviewer = [[NSSpeechSynthesizer alloc] initWithVoice:
		[NSString stringWithFormat:@"com.apple.speech.synthesis.voice.%@", interviewerVoice]];
	NSSpeechSynthesizer *guest = [[NSSpeechSynthesizer alloc] initWithVoice:
		[NSString stringWithFormat:@"com.apple.speech.synthesis.voice.%@", guestVoice]];

	NSError *error;
	NSString *inputFile = [NSString stringWithUTF8String:argv[1]];
	NSString *inputText = [NSString stringWithContentsOfFile:inputFile
		encoding:NSUTF8StringEncoding error:&error];

	if (!inputText)
		NSLog(@"Error opening file: %@", [error localizedDescription]);
	else {

		NSArray *lines = [inputText componentsSeparatedByString:@"\n"];
		NSString *interviewerCue = [lines objectAtIndex:0];
		NSString *guestCue = [lines objectAtIndex:1];
		[currentVoice setString:@"interviewer"];

		for( int i=2; i<[lines count]; i++ ) {
			NSString *line = [lines objectAtIndex:i];
			if ([line hasPrefix:interviewerCue]) {
				[interviewer startSpeakingString:[line substringFromIndex:[interviewerCue length]]];
				[currentVoice setString:@"interviewer"];
			} else if ([line hasPrefix:guestCue]) {
				[guest startSpeakingString:[line substringFromIndex:[guestCue length]]];
				[currentVoice setString:@"guest"];
			} else if ([line length]) {
				usleep( 250 ); // pause for paragraph breaks
				if ([currentVoice isEqualToString:@"interviewer"])
					[interviewer startSpeakingString:line];
				else
					[guest startSpeakingString:line];
			}
			while( [NSSpeechSynthesizer isAnyApplicationSpeaking] ) usleep( 250 );
			sleep( 1 );
		}
	}
	[currentVoice release];
	[interviewer release];
	[guest release];
	[pool release];
	return 0;
}