//
//  Perforce_ServerConfig.m
//  Perforce Server
//
//  Created by Mike Ashmore on 3/3/10.
//  Copyright 2010 Mike Ashmore. All rights reserved.
//

#import "Perforce_ServerConfig.h"

NSString *plistPath = @"/Library/LaunchDaemons/com.perforce.p4d.plist";

@implementation Perforce_ServerConfig

@synthesize p4rootPath, p4logPath, p4port;

- (BOOL) authenticatedRunCommand:(NSString *)command
{    
    BOOL ret = NO;
	char *buf = NULL;
    
	asprintf(&buf, [command UTF8String]);
	if(!buf)
	{
		return NO;
	}
    
	char* arguments[] = { "-c", buf, NULL };
	if(AuthorizationExecuteWithPrivileges(auth, "/bin/sh", kAuthorizationFlagDefaults, arguments, NULL) == errAuthorizationSuccess)
	{
		int status;
		int pid = wait(&status);
		if(pid != -1 && WIFEXITED(status) && WEXITSTATUS(status) == 0)
			ret = YES;
	}
	free(buf);
	return ret;
}

- (BOOL) installPlist
{
    NSDictionary *launchdPlist = [self launchdPrefList];
    [launchdPlist writeToFile:@"/tmp/com.perforce.p4d.plist" atomically:YES];
	
	return [self authenticatedRunCommand:[@"cp /tmp/com.perforce.p4d.plist " stringByAppendingString:plistPath]];
}

- (BOOL) isRunning
{
    BOOL running;
    // Run a shell command to check with launchctl if the com.perforce.p4d job is loaded
    NSArray *args = [NSArray arrayWithObjects:@"-c", @"launchctl list | grep com.perforce.p4d", nil];
    NSTask *runCheck = [NSTask launchedTaskWithLaunchPath:@"/bin/sh" arguments:args];
    [runCheck waitUntilExit];
    // if grep doesn't see a line from launchctl indicating the com.perforce.p4d job is loaded, the command's exit status will be nonzero
    running = ([runCheck terminationStatus] == 0);
	return running;
}

- (void) startServer 
{
    NSFileManager *fileManager = [NSFileManager defaultManager];
    if (![fileManager fileExistsAtPath:plistPath]) {
        [self installPlist];
    }
    [self authenticatedRunCommand:[@"launchctl load " stringByAppendingString:plistPath]];
}

- (void) stopServer
{
    [self authenticatedRunCommand:[@"launchctl unload " stringByAppendingString:plistPath]];
    [self authenticatedRunCommand:[@"rm " stringByAppendingString:plistPath]];
}

- (void) awakeFromNib
{
    self.p4rootPath = [@"~/Documents/p4d" stringByStandardizingPath];
    self.p4logPath = [@"~/Documents/p4d/log" stringByStandardizingPath];
    self.p4port = [NSNumber numberWithInt:1666];

    auth = nil;
    // create an empty authorization reference for later use by commands that need it
    if (AuthorizationCreate(NULL, kAuthorizationEmptyEnvironment, kAuthorizationFlagInteractionAllowed, &auth) != errAuthorizationSuccess) {
        auth = nil;
    }    
}

- (NSDictionary *) launchdPrefList
{
    NSBundle *mb = [NSBundle bundleWithIdentifier:@"com.perforce.p4d"];
    NSString *launchdPlistTemplatePath = [mb pathForResource:@"com.perforce.p4d.plist" ofType:nil];
    NSDictionary *launchdTemplate = [NSDictionary dictionaryWithContentsOfFile:launchdPlistTemplatePath];
    NSString *p4dPath = [mb pathForResource:@"p4d" ofType:nil];    

    // Only one program argument, the path to the server.
    NSArray *programArgs = [NSArray arrayWithObject:p4dPath];
    [launchdTemplate setValue:programArgs forKey:@"ProgramArguments"];
    
    // and the environment variables we're setting ...
    NSDictionary *environment = [NSDictionary dictionaryWithObjectsAndKeys:
                                 self.p4rootPath, @"P4ROOT",
                                 self.p4logPath, @"P4LOG", 
                                 [self.p4port stringValue], @"P4PORT",
                                 nil];
    [launchdTemplate setValue:environment forKey:@"EnvironmentVariables"];

    return launchdTemplate;
}

- (void) dealloc
{
    [defaultsController release];
    [super dealloc];
}

@end