/*
 * Copyright 2007-2011 The OpenRA Developers (see AUTHORS)
 * This file is part of OpenRA, which is free software. It is made 
 * available to you under the terms of the GNU General Public License
 * as published by the Free Software Foundation. For more information,
 * see COPYING.
 */
#import "Controller.h"

@implementation Controller

+ (void)initialize
{
	[[NSUserDefaults standardUserDefaults]
	 registerDefaults:[NSDictionary dictionaryWithObject:[[NSBundle mainBundle] resourcePath]
												  forKey:@"gamepath"]];
}

extern char **environ;
- (void)applicationDidFinishLaunching:(NSNotification *)aNotification
{
	gamePath = [[NSUserDefaults standardUserDefaults] stringForKey:@"gamepath"];
	
	// Try and launch the game
	if (![self initMono])
	{
		NSAlert *alert = [NSAlert alertWithMessageText:@"Mono Framework"
										 defaultButton:@"Download Mono"
									   alternateButton:@"Quit"
										   otherButton:nil
							 informativeTextWithFormat:@"OpenRA requires the Mono Framework version 2.6.7 or later."];
		
		if ([alert runModal] == NSAlertDefaultReturn)
			[[NSWorkspace sharedWorkspace] openURL:[NSURL URLWithString:@"http://www.go-mono.com/mono-downloads/download.html"]];
		
		[[NSApplication sharedApplication] terminate:self];
	}
	
	[self launch];
	[NSApp terminate: nil];
}

- (BOOL)shouldHideMenubar
{
	NSTask *task = [[[NSTask alloc] init] autorelease];
	NSPipe *pipe = [NSPipe pipe];
	
    NSMutableArray *taskArgs = [NSMutableArray arrayWithObjects:@"OpenRA.Utility.exe",
								@"--settings-value",
								@"Graphics.Mode", nil];
	
    [task setCurrentDirectoryPath:gamePath];
    [task setLaunchPath:monoPath];
    [task setArguments:taskArgs];
	[task setStandardOutput:pipe];
	NSFileHandle *readHandle = [pipe fileHandleForReading];
	[task launch];
	[task waitUntilExit];
    
    if ([task terminationStatus] != 0)
    {
        NSAlert *alert = [NSAlert alertWithMessageText:@"Error"
										 defaultButton:@"Quit"
									   alternateButton:nil
										   otherButton:nil
							 informativeTextWithFormat:@"OpenRA.Utility returned an error and cannot continue.\n\nA log has been saved to ~/Library/Application Support/OpenRA/Logs/utility.log"];
		
        [alert runModal];
		[[NSApplication sharedApplication] terminate:self];

    }
    
	NSString *response = [[[NSString alloc] initWithData:[readHandle readDataToEndOfFile]
										   encoding: NSUTF8StringEncoding] autorelease];
	return ![response isEqualToString:@"Windowed\n"];
}

-(void)launch
{
	// Use LaunchServices because neither NSTask or NSWorkspace support Info.plist _and_ arguments pre-10.6
	
	// First argument is the directory to run in
	// Second...Nth arguments are passed to OpenRA.Game.exe
	// Launcher wrapper sets mono --debug, gl renderer and support dir.
	NSArray *args = [NSArray arrayWithObjects:@"--launch",
					 [self shouldHideMenubar] ? @"--hide-menubar" : @"--no-hide-menubar",
					 gamePath,
					 monoPath,
					 nil];
	FSRef appRef;
	CFURLGetFSRef((CFURLRef)[NSURL URLWithString:[[[NSBundle mainBundle] executablePath] stringByAddingPercentEscapesUsingEncoding:NSASCIIStringEncoding]], &appRef);
	
	// Set the launch parameters
	LSApplicationParameters params;
	params.version = 0;
	params.flags = kLSLaunchDefaults | kLSLaunchNewInstance;
	params.application = &appRef;
	params.asyncLaunchRefCon = NULL;
	params.environment = NULL; // CFDictionaryRef of environment variables; could be useful
	params.argv = (CFArrayRef)args;
	params.initialEvent = NULL;
	
	ProcessSerialNumber psn;
	OSStatus err = LSOpenApplication(&params, &psn);

	// Bring the game window to the front
	if (err == noErr)
		SetFrontProcess(&psn);
}


- (BOOL)initMono
{
	// Find the users mono
	NSPipe *outPipe = [NSPipe pipe];
	NSTask *task = [[NSTask alloc] init];
    [task setLaunchPath:@"/usr/bin/which"];
    [task setArguments:[NSMutableArray arrayWithObject:@"mono"]];
	[task setStandardOutput:outPipe];
	[task setStandardError:[task standardOutput]];
    [task launch];
	
	NSData *data = [[outPipe fileHandleForReading] readDataToEndOfFile];
	[task waitUntilExit];
    [task release];
	
	NSString *temp = [[[NSString alloc] initWithData:data encoding:NSASCIIStringEncoding] autorelease];
	// Remove whitespace and resolve symlinks
	monoPath = [[[temp stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]]
				 stringByResolvingSymlinksInPath] retain];
	
	if (![monoPath length])
		return NO;
	
	// Find the mono version
	outPipe = [NSPipe pipe];
	task = [[NSTask alloc] init];
    [task setLaunchPath:monoPath];
    [task setArguments:[NSMutableArray arrayWithObject:@"--version"]];
	[task setStandardOutput:outPipe];
	[task setStandardError:[task standardOutput]];
    [task launch];
	
	data = [[outPipe fileHandleForReading] readDataToEndOfFile];
	[task waitUntilExit];
    [task release];
	
	NSString *ret = [[NSString alloc] initWithData:data encoding:NSASCIIStringEncoding];
	
	int major = 0;
	int minor = 0;
	int point = 0;
	sscanf([ret UTF8String], "Mono JIT compiler version %d.%d.%d", &major, &minor, &point);
	[ret release];
	
	return (major > 2 ||
			(major == 2 && minor > 6) ||
			(major == 2 && minor == 6 && point >= 7));
}

- (void)dealloc
{
	[monoPath release]; monoPath = nil;
	[gamePath release]; gamePath = nil;
	[super dealloc];
}

@end