#import "P4MenuApplicationDelegate.h"
#import "NGAActiveFileMonitor.h"
#import "NGAUtilities.h"
#import "P4DiffTool.h"

#import "DBPrefsWindowController.h"

#import "P4MenuController.h"
#import "P4MenuLocalFile.h"

SOLogger *gLogger;
NSString *gLogFilePath;

NSString * const DiffOptionName1 = @"DiffOptionName1";
NSString * const DiffOptionName2 = @"DiffOptionName2";
NSString * const DiffOptionUTIHint = @"DiffOptionUTIHint";


@interface P4MenuApplicationDelegate ()
-(void)_updateDiffTools;
-(P4DiffTool*)MB_textDiffTool;

@property (nonatomic,readwrite,copy) NSArray * diffTools;
@property (nonatomic,readwrite,copy) NSArray * textualDiffTools;
@end

static NSString * const kFileMonitorKeyPath = @"pathToActiveFile";

static NSString * const kFirstRunKey = @"InitialLaunch";
static NSString * const kTextDiffToolKey = @"TextualDiffToolApplicationBundleIdentifier";

static NSString * const kP4MergeBundleIdentifier = @"com.perforce.p4merge";


@implementation P4MenuApplicationDelegate
@synthesize
diffTools = _diffTools
,textualDiffTools = _textualDiffTools
;

+(void) initialize
{
    static dispatch_once_t pred;
    dispatch_once(&pred, ^{
        
        [[[NSUserDefaultsController sharedUserDefaultsController] defaults] registerDefaults:[NSDictionary dictionaryWithObjectsAndKeys:[NSNumber numberWithBool:YES], kFirstRunKey, nil]];
        [[[NSUserDefaultsController sharedUserDefaultsController] defaults] registerDefaults:[NSDictionary dictionaryWithObjectsAndKeys:kP4MergeBundleIdentifier, kTextDiffToolKey, nil]];
        
        gLogger = [[SOLogger alloc] initWithFacility:[[NSBundle mainBundle] bundleIdentifier] options:SOLoggerDefaultASLOptions];
        
#ifdef DEBUG
        gLogger.severityFilterMask = ASL_FILTER_MASK_UPTO (ASL_LEVEL_DEBUG);
#endif
        /* Create a path to the desktop log file. */
        
        NSMutableArray *pathComponents = [[NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES) mutableCopy] autorelease];
        [pathComponents addObject:@"Logs"];

        NSError * error = nil;
        
        if (![[NSFileManager defaultManager] createDirectoryAtPath:[NSString pathWithComponents:pathComponents] withIntermediateDirectories:YES attributes:nil error:&error])
        {
            NSLog(@"%@", error);
        }
        
        [pathComponents addObject:[[[NSBundle mainBundle] bundleIdentifier] stringByAppendingPathExtension:@"log"]];
        gLogFilePath = [[NSString pathWithComponents:pathComponents] retain]; 
        
        FILE * file = fopen([gLogFilePath fileSystemRepresentation], "w+");
        if ( file )
            [gLogger addFileDescriptor:fileno(file)];
        else
            NSLog(@"Couldn't open log file due to error \"%s\"(%d)", strerror(errno), errno);
        
        LOG_INFO(@"Host Name: %@", [[NSProcessInfo processInfo] hostName]);
        LOG_INFO(@"Operating System: %@", [[NSProcessInfo processInfo] operatingSystemName]);
        LOG_INFO(@"Operating System Version: %@", [[NSProcessInfo processInfo] operatingSystemVersionString]);
        LOG_INFO(@"Physical Memory: %uGB", [[NSProcessInfo processInfo] physicalMemory] / 1024 / 1024 / 1024);
        LOG_INFO(@"Processor Count: %u", [[NSProcessInfo processInfo] processorCount]);
        LOG_INFO(@"Environment: %@", [[NSProcessInfo processInfo] environment]);
        
    });
}

-(id)init
{
    if ( (self = [super init]) == nil )
        return nil;
    
    _p4MenuController = [[P4MenuController alloc] initWithMainController:self];

    return self;
}
    
- (void)dealloc
{
    RELEASE(_diffTools);
    RELEASE(_textualDiffTools);
    RELEASE(_p4MenuController);

    [super dealloc];
}
    
    
-(NSWindow*)statusBarWindow
{
    static Class NSStatusBarWindowClass = 0;
    
    if ( NSStatusBarWindowClass == 0 )
        NSStatusBarWindowClass = NSClassFromString(@"NSStatusBarWindow");

    for (id window in [NSApp windows]) {
        if ( [window isKindOfClass:NSStatusBarWindowClass] )
            return window;
    }
    return nil;
}


- (void)applicationDidFinishLaunching:(NSNotification *)aNotification
{
    // Swiped from the UIElementInspector sample code
    if (!AXAPIEnabled())
    {
        NSInteger ret = NSRunAlertPanel(
                                  [NSString stringWithFormat:NSLocalizedString(@"%@ requires that the Accessibility API be enabled.  Would you like me to launch System Preferences so that you can turn on \"Enable access for assistive devices\".", "Note: Shows when Accesibility is not on"), [[NSRunningApplication currentApplication] localizedName]],
                                  @"",
                                  NSLocalizedString(@"Ok", @"OK"),
                                  NSLocalizedString(@"Quit", @"Quit"),
                                  NSLocalizedString(@"Cancel", @"Cancel"));
        
        switch (ret)
        {
            case NSAlertDefaultReturn:
                [[NSWorkspace sharedWorkspace] openFile:@"/System/Library/PreferencePanes/UniversalAccessPref.prefPane"];
                break;
                
            case NSAlertAlternateReturn:
                
                [NSApp terminate:self];
                return;
                break;
            case NSAlertOtherReturn: // just continue
            default:
                break;
                
        }
    }

    @try {
        LOG_INFO(@"starting p4 menu controller");
    _p4MenuController.enabled = true;
    _p4MenuController.currentLocalFile = [P4MenuLocalFile localFileWithLocalFilepath:[[NGAActiveFileMonitor sharedMonitor] mainWindowDocumentPath]];

        
    [[DBPrefsWindowController sharedPrefsWindowController] setWindowFrameAutosaveName:@"Preferences" ];
        
    DBPrefsWindowController.sharedPrefsWindowController.currentIdentifierAutosaveName = @"CurrentPreferencePane";

        LOG_INFO(@"adding perforce preference view");
    [[DBPrefsWindowController sharedPrefsWindowController] addView:_p4MenuController.preferencePaneView
                                                             label:_p4MenuController.preferencePaneTitle
                                                             image:_p4MenuController.preferencePaneIcon];
    
        LOG_INFO(@"adding comparison preference view");
    [[DBPrefsWindowController sharedPrefsWindowController] addView:_preferenceView
                                                             label:NSLocalizedString( @"File Comparison", @"File Comparison Preference Pane Label" )
                                                             image:[NSImage imageNamed:@"DiffPreference"]];
    

        LOG_INFO(@"setting ignored apps");
    [NGAActiveFileMonitor sharedMonitor].ignoredProcessBundleIDs = [NSSet setWithObjects:
#ifdef DEBUG
                                                                    @"com.apple.dt.Xcode",
                                                                    @"com.apple.Console",
#endif
                                                  [[NSRunningApplication currentApplication] bundleIdentifier],
                                                  nil];
    [[NGAActiveFileMonitor sharedMonitor] startMonitoring];

        LOG_INFO(@"updating diff tools");
    [self _updateDiffTools];
        LOG_INFO(@"finished updating diff tools");
        
        [[NSUserDefaultsController sharedUserDefaultsController] addObserver:self forKeyPath:KEYPATH(@"values",kTextDiffToolKey) options:NSKeyValueObservingOptionNew|NSKeyValueObservingOptionInitial context:NULL];
        
        [textualDiffToolsController addObserver:self forKeyPath:@"selectionIndex" options:NSKeyValueObservingOptionOld|NSKeyValueObservingOptionNew context:NULL];

    if ( [[[NSUserDefaultsController sharedUserDefaultsController] defaults] boolForKey:kFirstRunKey] == YES )
    {
        [self showPrefs:self];
        [[[NSUserDefaultsController sharedUserDefaultsController] defaults] setBool:NO forKey:kFirstRunKey];
    }
    
    }
    @catch (NSException *exception) {
        LOG_INFO(@"Exception while starting the application. %@", exception);
        [[NSApplication sharedApplication] terminate:self];
    }
    @finally {
    }
    
}

-(void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context
{
    if ( NSSTRING_ISEQUALTOSTRING(keyPath, @"selectionIndex") )
    {
        NSUInteger index = textualDiffToolsController.selectionIndex;
        
        id obj = [[textualDiffToolsController.arrangedObjects objectAtIndex:index] representedApplicationID];
        
        LOG_INFO(@"Setting defaults to %@", obj);
        [[[NSUserDefaultsController sharedUserDefaultsController] values] setValue:obj forKey:kTextDiffToolKey];
        return;
    }

    if ( NSSTRING_ISEQUALTOSTRING(keyPath, KEYPATH(@"values",kTextDiffToolKey) ) )
    {
        
        NSString * applicationID = [[[NSUserDefaultsController sharedUserDefaultsController] values] valueForKey:kTextDiffToolKey];
        
        NSUInteger index = [textualDiffToolsController.arrangedObjects indexOfObjectPassingTest:^BOOL(id obj, NSUInteger idx, BOOL *stop) {
            if ( NSSTRING_ISEQUALTOSTRING([obj representedApplicationID], applicationID) )
            {
                *stop = YES;
                return YES;
            }
            return NO;   
        }];
        if (index == NSNotFound)
            index = 0;
        
        LOG_INFO(@"Setting selectionIndex to %u", index);
        textualDiffToolsController.selectionIndex = index;
        return;
    }
        
    [super observeValueForKeyPath:keyPath ofObject:object change:change context:context];
}

- (void)applicationDidBecomeActive:(NSNotification *)aNotification
{
    static Class NSStatusBarWindowClass = 0;
    
    if ( NSStatusBarWindowClass == 0 )
        NSStatusBarWindowClass = NSClassFromString(@"NSStatusBarWindow");
    

    for (id window in [NSApp windows]) {
        if ( [window isKindOfClass:NSStatusBarWindowClass] )
            continue;
        if ( [window isVisible] )
        {
            return;
        }
    }
    
    [[[NGAActiveFileMonitor sharedMonitor] monitoredApplication] activateWithOptions:0];
}

- (BOOL)applicationShouldTerminateAfterLastWindowClosed:(NSApplication *)theApplication
{
    [NSApp deactivate];
    [[[NGAActiveFileMonitor sharedMonitor] monitoredApplication] activateWithOptions:0];
    return NO;
}

- (IBAction)showPrefs:(id)sender
{
    [NSApp activateIgnoringOtherApps:YES];
    [[DBPrefsWindowController sharedPrefsWindowController] showWindow:self];
}


- (void)applicationWillTerminate:(NSNotification *)aNotification
{
}

- (BOOL)MB_activateApplicationWithBundleIdentifier:(NSString*)identifier
{
    NSArray * runningApplications = [NSRunningApplication runningApplicationsWithBundleIdentifier:identifier];
    for (NSRunningApplication * runningApplication in runningApplications)
        [runningApplication activateWithOptions:NSApplicationActivateIgnoringOtherApps];
    return YES;
}

- (void)_updateDiffTools
{
    // Look through the plugins and find all of them
    
    // If they open a text type, add to text list
    // If they open an image type, add to image list
    
    // Add each to the list of global tools
    
    // Get a reference to the Script folder
    
    NSString * pluginToolsPath = [[NSBundle mainBundle] builtInPlugInsPath];
    
    NSString * diffToolsPath = [pluginToolsPath stringByAppendingPathComponent:@"Diff"];
    NSArray * diffToolNames = [[NSFileManager defaultManager] contentsOfDirectoryAtPath:diffToolsPath error:nil];
    
    NSMutableArray * loadedDiffTools = [NSMutableArray arrayWithCapacity:[diffToolNames count]];
    
    NSMutableArray * applicationOverrideTools = [NSMutableArray arrayWithCapacity:[diffToolNames count]];
    NSMutableArray * textualDiffTools = [NSMutableArray arrayWithCapacity:[diffToolNames count]];
    
    for (NSString * diffToolName in diffToolNames)
    {
        if ( ![[diffToolName pathExtension] isEqualToString:kDiffToolExtension] )
        {
            LOG_ERROR( @"%@ does not have an extension of .%@ Skipping.", diffToolName, kDiffToolExtension );
            continue;
        }
        NSString * diffToolBundlePath = [diffToolsPath stringByAppendingPathComponent:diffToolName];
        NSBundle * diffToolBundle = [NSBundle bundleWithPath:diffToolBundlePath];

        if ( !diffToolBundle )
        {
            LOG_ERROR( @"Could not create a bundle from path %@ Skipping.", diffToolBundlePath );
            continue;
        }
        
        NSString * pluginType = [diffToolBundle objectForInfoDictionaryKey:kDiffToolTypeKey];

        P4DiffTool * tool = nil;
        
        // Test to see if the plugin has an applscript of task type and load
        // with the appropriate class
        
        if ( [pluginType isEqualToString:kDiffToolTypeAppleScript] )
            tool = [[[P4DiffToolAppleScript alloc] initWithBundle:diffToolBundle] autorelease];
        else if ( [pluginType isEqualToString:kDiffToolTypeTask] )
            tool = [[[P4DiffToolTask alloc] initWithBundle:diffToolBundle] autorelease];
        
        if ( !tool )
        {
            LOG_ERROR( @"Bundle at %@ is malformed. Skipping.", diffToolBundlePath );
            continue;
        }

        // Check to see if this application is even on the disk
        if ( ![[NSWorkspace sharedWorkspace] absolutePathForAppBundleWithIdentifier:tool.representedApplicationID] )
        {
            LOG_ERROR( @"Skipping diff tool for %@ because it cannot be found on this computer", tool.representedApplicationID );
            continue;
        }
        
        [loadedDiffTools addObject:tool];
    }
    
    // Add Manual Comparison
    // NOTE: This is ALWAYS available
    
    [loadedDiffTools addObject:[[P4DiffToolManualComparison new] autorelease]];
    
    for (P4DiffTool * tool in loadedDiffTools)
    {
        if ( [tool recognizesDocumentType:@"public.text"] )
            [textualDiffTools addObject:tool];
        
        if ( ![tool isOnlyForFileComparison] )
            [applicationOverrideTools addObject:tool];
        
        if ( [tool isOnlyForFileComparison] && ![tool recognizesDocumentType:@"public.text"] )
            LOG_ERROR( @"Tool representing application %@ is only for diffing but doesn't recognize the text filetype so it will not appear in the preferences.", tool.representedApplicationName );
    }
    
    self.diffTools = [NSArray arrayWithArray:applicationOverrideTools];
    self.textualDiffTools = [NSArray arrayWithArray:textualDiffTools];
}

-(NSString*)UTIOfFileAtPath:(NSString*)filePath
{
    return [[NSWorkspace sharedWorkspace] typeOfFile:filePath error:nil];
}

-(P4DiffTool*)MB_textDiffTool
{
    NSString * textToolAppID = [[NSUserDefaults standardUserDefaults] objectForKey:kTextDiffToolKey];
    
    for (P4DiffTool * tool in self.textualDiffTools)
    {
        if ( [textToolAppID isEqualToString:tool.representedApplicationID] )
            return tool;
    }
    return nil;
}

-(BOOL)diffFileAtPath:(NSString*)path1 againstOlderFileAtPath:(NSString*)path2 options:(NSDictionary*)options
{
    NSString * name1 = [options objectForKey:DiffOptionName1];
    NSString * name2 = [options objectForKey:DiffOptionName2];

    LOG_DEBUG(@"path1:'%@' name1:'%@' path2:'%@' name2:'%@'", path1, name1, path2, name2);
    
    NSString * fileUTI = [self UTIOfFileAtPath:path1];
    NSString * fileUTIHint = [options objectForKey:DiffOptionUTIHint];

    if ( !fileUTI || [fileUTI isEqualToString:(NSString*)kUTTypeData] )
    {
        if ( fileUTIHint )
        {
            LOG_DEBUG(@"path1:'%@' has no UTI (or is the generic 'public.data'). Using UTIHint: '%@'", path1, fileUTIHint);
            fileUTI = fileUTIHint;
        }
        else
        {
            LOG_DEBUG(@"path1:'%@' has no UTI and there is no hint. Reverting to Manual Comparison.", path1);
        }
    }
    else
    {
        LOG_DEBUG(@"path1:'%@' has UTI: '%@'", path1, fileUTI);
    }
    
    NSString * diffApplicationIdentifier = [[NGAActiveFileMonitor sharedMonitor] monitoredApplication].bundleIdentifier;
    
    // First, try the application-specific tools
    
    for (P4DiffTool * tool in self.diffTools)
    {
        if ( !tool.active )
            continue;

        if ([tool.representedApplicationID isEqualToString:[[NGAActiveFileMonitor sharedMonitor] monitoredApplication].bundleIdentifier])
        {
            LOG_DEBUG(@"First trying with Application tool: %@", tool);

            if ( [tool diffFileWithPath:path1 againstOlderFileWithPath:path2] )
                return [self MB_activateApplicationWithBundleIdentifier:diffApplicationIdentifier];
            else
                LOG_DEBUG(@"Failed diffing with tool %@. Trying textual comparison", tool);
        }
    }
    
    // Then, if the file is text, try a text tool

    if ( [fileUTI conformsToUTI:@"public.text"] )
    {
        P4DiffTool * textDiffTool = [self MB_textDiffTool];
        LOG_DEBUG(@"'%@' is a text file. Using tool: %@", path1, textDiffTool);

        if ([textDiffTool diffFileWithPath:path1 againstOlderFileWithPath:path2])
            return [self MB_activateApplicationWithBundleIdentifier:textDiffTool.representedApplicationID];
        else
            LOG_DEBUG(@"Failed diffing with tool %@. Reverting to manual comparison", textDiffTool);
    }
    else
    {
        LOG_DEBUG(@"'%@' does not conform to UTI: 'public.text'. Reverting to Manual comparison.", path1);
    }

    // As a last resort, we simply open the temporary file in the active process
    
    LOG_DEBUG(@"Application differ not available and text file diffing didn't work. Reverting to manual comparison");
    return [[NSWorkspace sharedWorkspace] openFile:path2
                            withApplication:[[[NGAActiveFileMonitor sharedMonitor] monitoredApplication].executableURL path]
                              andDeactivate:YES];
}


@end