//
//  BSImagePreviewInspector.m
//  BathyScaphe
//
//  Created by Tsutomu Sawada on 05/10/10.
//  Copyright 2005-2011 BathyScaphe Project. All rights reserved.
//  encoding="UTF-8"
//

#import "BSImagePreviewInspector.h"
#import "BSIPIArrayController.h"
#import "BSIPIFullScreenController.h"
#import "BSIPIPathTransformer.h"
#import "BSIPIImageView.h"
#import "BSIPIToken.h"
#import "BSIPIDefaults.h"
#import "BSIPIPreferencesController.h"
#import <SGAppKit/NSWorkspace-SGExtensions.h>
#import <CocoMonar/CMRPropertyKeys.h>
#import "BSIPILeopardSlideshowHelper.h"

@class BSIPITableView;
@class BSIPIFullScreenWindow;

static NSString *const kIPINibFileNameKey		= @"BSImagePreviewInspector3";
static NSString *const kIPIPrefsNibFileNameKey	= @"BSIPIPreferences";

@implementation BSImagePreviewInspector
- (id)initWithPreferences:(AppDefaults *)prefs
{
	if (self = [super initWithWindowNibName:kIPINibFileNameKey]) {
		NSNotificationCenter	*dnc = [NSNotificationCenter defaultCenter];
		BSIPIDefaults			*defaults = [BSIPIDefaults sharedIPIDefaults];

		[defaults setAppDefaults:prefs];

		id transformer = [[[BSIPIPathTransformer alloc] init] autorelease];
		[NSValueTransformer setValueTransformer:transformer forName:@"BSIPIPathTransformer"];

		id anotherTransformer = [[[BSIPIImageIgnoringDPITransformer alloc] init] autorelease];
		[NSValueTransformer setValueTransformer:anotherTransformer forName:@"BSIPIImageIgnoringDPITransformer"];

		[dnc addObserver:self
				selector:@selector(applicationWillTerminate:)
					name:NSApplicationWillTerminateNotification
				  object:NSApp];
		[dnc addObserver:self
				selector:@selector(makeWindowOpaqueWithFade:)
					name:BSIPITokenDownloadDidFinishNotification
				  object:nil];
		[dnc addObserver:self
				selector:@selector(tokenDidFailDownload:)
					name:BSIPITokenDownloadErrorNotification
				  object:nil];

		[defaults addObserver:self forKeyPath:@"alwaysBecomeKey" options:NSKeyValueObservingOptionNew context:kBSIPIDefaultsContext];
		[defaults addObserver:self forKeyPath:@"floating" options:NSKeyValueObservingOptionNew context:kBSIPIDefaultsContext];
		[defaults addObserver:self forKeyPath:@"alphaValue" options:NSKeyValueObservingOptionNew context:kBSIPIDefaultsContext];
		[defaults addObserver:self forKeyPath:@"imageViewBgColorData" options:NSKeyValueObservingOptionNew context:kBSIPIDefaultsContext];
        [defaults addObserver:self forKeyPath:@"autoCollectImages" options:NSKeyValueObservingOptionNew context:kBSIPIDefaultsContext];
	}
	return self;
}

- (void)dealloc
{
    [[BSIPIDefaults sharedIPIDefaults] removeObserver:self forKeyPath:@"autoCollectImages"];
	[[BSIPIDefaults sharedIPIDefaults] removeObserver:self forKeyPath:@"imageViewBgColorData"];
	[[BSIPIDefaults sharedIPIDefaults] removeObserver:self forKeyPath:@"alphaValue"];
	[[BSIPIDefaults sharedIPIDefaults] removeObserver:self forKeyPath:@"floating"];
	[[BSIPIDefaults sharedIPIDefaults] removeObserver:self forKeyPath:@"alwaysBecomeKey"];
	[[NSNotificationCenter defaultCenter] removeObserver:self];
    [self setFadeOutTimer:nil];
    [m_toolbarItems release];
	[super dealloc];
}

- (id)historyManager
{
	return [BSIPIHistoryManager sharedManager];
}

- (NSTimer *)fadeOutTimer
{
    return m_fadeOutTimer;
}

- (void)setFadeOutTimer:(NSTimer *)aTimer
{
    if (aTimer != m_fadeOutTimer) {
        [aTimer retain];
        [m_fadeOutTimer invalidate];
        [m_fadeOutTimer release];
        m_fadeOutTimer = aTimer;
    }
}

- (IBAction)togglePreviewPanel:(id)sender
{
	if ([self isWindowLoaded] && [[self window] isVisible]) {
		// orderOut: では windowWillClose: はもちろん呼ばれない。
		if ([[BSIPIDefaults sharedIPIDefaults] resetWhenHide]) [[self tripleGreenCubes] setSelectionIndex:NSNotFound];
		[[self window] orderOut:sender];
	} else {
		[self showWindow:sender];
	}
}

- (IBAction)showWindow:(id)sender
{
    [super showWindow:sender];
    if (sender != self) {
        [self makeWindowOpaqueWithFade:nil];
    }
}

#pragma mark Actions
- (IBAction)showPreviewerPreferences:(id)sender
{
	[[BSIPIPreferencesController sharedPreferencesController] showWindow:sender];
}

- (IBAction)resetPreviewer:(id)sender
{
    [[self tripleGreenCubes] removeAll:nil];
}

- (IBAction)forceRunTbCustomizationPalette:(id)sender
{
	[[self window] runToolbarCustomizationPalette:self];
}

- (IBAction)copyURL:(id)sender
{
	[[self historyManager] appendDataForTokenAtIndexes:[[self tripleGreenCubes] selectionIndexes]
										  toPasteboard:[NSPasteboard generalPasteboard]
							   withFilenamesPboardType:NO];
}

- (IBAction)openImage:(id)sender
{
	[[self historyManager] openURLForTokenAtIndexes:[[self tripleGreenCubes] selectionIndexes]
									   inBackground:[[[BSIPIDefaults sharedIPIDefaults] appDefaults] openInBg]];
}

- (IBAction)openImageWithPreviewApp:(id)sender
{
	[[self historyManager] openCachedFileForTokenAtIndexesWithPreviewApp:[[self tripleGreenCubes] selectionIndexes]];
}

- (IBAction)startFullscreen:(id)sender
{
	static BOOL	isBinded = NO;

	if ([[BSIPIDefaults sharedIPIDefaults] useIKSlideShowOnLeopard]) {
		id<BSIPILeopardSlideshowHelperProtocol> instance = [BSIPILeopardSlideshowHelper sharedInstance];
		[instance setArrayController:[self tripleGreenCubes]];
		[instance startSlideshow];
	} else {
		m_shouldRestoreKeyWindow = [[self window] isKeyWindow];

		NSIndexSet *tmp_ = [[self tripleGreenCubes] selectionIndexes];
		if ([tmp_ count] > 1) {
			[[self tripleGreenCubes] setSelectionIndex:[tmp_ firstIndex]];
		}

		[[BSIPIFullScreenController sharedInstance] setDelegate:self];

		if (!isBinded) {
			[[BSIPIFullScreenController sharedInstance] bind:@"windowBackgroundColor"
													toObject:[BSIPIDefaults sharedIPIDefaults]
												 withKeyPath:@"fullScreenBgColorData"
													 options:[NSDictionary dictionaryWithObject:NSUnarchiveFromDataTransformerName
																						 forKey:NSValueTransformerNameBindingOption]];
			isBinded = YES;
		}

		[[BSIPIFullScreenController sharedInstance] setArrayController:[self tripleGreenCubes]];
		[[BSIPIFullScreenController sharedInstance] startFullScreen:[[self window] screen]];
	}
}

- (IBAction)saveImage:(id)sender
{
    if ([[BSIPIDefaults sharedIPIDefaults] autoCollectImages]) {
        [[self historyManager] revealCachedFileForTokenAtIndexes:[[self tripleGreenCubes] selectionIndexes]];
    } else {
        [[self historyManager] copyCachedFileForTokenAtIndexes:[[self tripleGreenCubes] selectionIndexes]
                                                    intoFolder:[[BSIPIDefaults sharedIPIDefaults] saveDirectory]];
    }
}

- (IBAction)saveImageAs:(id)sender
{
	m_shouldRestoreKeyWindow = [[self window] isKeyWindow];

	[[self historyManager] saveCachedFileForTokenAtIndex:[[self tripleGreenCubes] selectionIndex]
								 savePanelAttachToWindow:[self window]];
}

- (IBAction)cancelDownload:(id)sender
{
	[[self historyManager] makeTokensCancelDownloadAtIndexes:[[self tripleGreenCubes] selectionIndexes]];
}

- (IBAction)retryDownload:(id)sender
{
	[[self historyManager] makeTokensRetryDownloadAtIndexes:[[self tripleGreenCubes] selectionIndexes]];
}

- (IBAction)historyNavigationPushed:(id)sender
{
	NSInteger segNum = [sender selectedSegment];
	if (segNum == 0) {
		[[self tripleGreenCubes] selectPrevious:sender];
	} else if (segNum == 1) {
		[[self tripleGreenCubes] selectNext:sender];
	}
}

- (IBAction)changePane:(id)sender
{
	if ([sender isKindOfClass:[NSSegmentedControl class]]) {
		[[self tabView] selectTabViewItemAtIndex:[sender selectedSegment]];
	} else {
		NSInteger current_ = [[self tabView] indexOfTabViewItem:[[self tabView] selectedTabViewItem]];
		[[self tabView] selectTabViewItemAtIndex:(current_ == 0) ? 1 : 0];
		[[self paneChangeBtn] setSelectedSegment:(current_ == 0) ? 1 : 0];
	}
}

- (IBAction)changePaneAndShow:(id)sender
{
	NSUInteger	modifier_ = [[NSApp currentEvent] modifierFlags];
	if (modifier_ & NSAlternateKeyMask) {
		[self startFullscreen:sender];
		return;
	}
	[[self tabView] selectTabViewItemAtIndex:0];
	[[self paneChangeBtn] setSelectedSegment:0];
}

- (BOOL)previewLink:(NSURL *)url
{
	/* showWindow:
	   If the window is an NSPanel object and has its becomesKeyOnlyIfNeeded flag set to YES, the window is displayed in front of
	   all other windows but is not made key; otherwise it is displayed in front and is made key. This method is useful for menu actions.
	*/
	[self showWindow:self];
	NSUInteger	index = [[self historyManager] cachedTokenIndexForURL:url];
	if (index == NSNotFound) {
		BSIPIToken *token = [[BSIPIToken alloc] initWithURL:url destination:([[BSIPIDefaults sharedIPIDefaults] autoCollectImages] ?
                             [[self historyManager] dlDateFolderPath] : [[self historyManager] dlFolderPath])];
		[[self tripleGreenCubes] addObject:token];
		[token release];
	} else {
		[[self tripleGreenCubes] setSelectionIndex:index];
	}
	return YES;
}

- (BOOL)previewLinks:(NSArray *)urls
{
	[self showWindow:self];

	BSIPIArrayController *controller = [self tripleGreenCubes];

	NSUInteger index = NSNotFound;
    NSUInteger tmpIndex = [controller countOfArrangedObjects];
    BOOL isFirst = YES;

	[controller setSelectsInsertedObjects:NO];
	for (NSURL *url in urls) {
		index = [[self historyManager] cachedTokenIndexForURL:url];
		if (index == NSNotFound) {
			BSIPIToken *token = [[BSIPIToken alloc] initWithURL:url destination:([[BSIPIDefaults sharedIPIDefaults] autoCollectImages] ?
                                                                                 [[self historyManager] dlDateFolderPath] : [[self historyManager] dlFolderPath])];
			[controller addObject:token];
			[token release];
		} else {
            if (isFirst) {
                tmpIndex = index;
                isFirst = NO;
            }
        }
	}
    [controller setSelectionIndex:tmpIndex];
	[controller setSelectsInsertedObjects:YES];
	return YES;
}

- (BOOL)validateQueryURL:(NSURL *)anURL
{
    NSString *stringRep = [anURL absoluteString];
    NSRange extensionRange = [stringRep rangeOfString:@"." options:(NSBackwardsSearch|NSLiteralSearch)];
    NSUInteger start = NSMaxRange(extensionRange);
    if (extensionRange.location == NSNotFound || start == [stringRep length]) {
        return NO;
    }
    NSString *extension = [stringRep substringFromIndex:start];
    return [[NSImage imageFileTypes] containsObject:extension];
}

- (BOOL)validateLink:(NSURL *)url
{
    if ([url query]) {
        return [self validateQueryURL:url];
    }
	CFStringRef extensionRef = CFURLCopyPathExtension((CFURLRef)url);
	if (!extensionRef) {
		return NO;
	}

	NSString *extension = [(NSString *)extensionRef lowercaseString];
	CFRelease(extensionRef);

	return [[NSImage imageFileTypes] containsObject:extension];
}

#pragma mark Notifications
- (void)applicationWillTerminate:(NSNotification *)aNotification
{		
	[[self historyManager] flushCache];
    [[BSIPIDefaults sharedIPIDefaults] removeObserver:self forKeyPath:@"autoCollectImages"];
	[[BSIPIDefaults sharedIPIDefaults] removeObserver:self forKeyPath:@"imageViewBgColorData"];
	[[BSIPIDefaults sharedIPIDefaults] removeObserver:self forKeyPath:@"alphaValue"];
	[[BSIPIDefaults sharedIPIDefaults] removeObserver:self forKeyPath:@"floating"];
	[[BSIPIDefaults sharedIPIDefaults] removeObserver:self forKeyPath:@"alwaysBecomeKey"];
	[[NSNotificationCenter defaultCenter] removeObserver:self];
    [self setFadeOutTimer:nil];
    [m_toolbarItems release];
}

- (void)windowWillClose:(NSNotification *)aNotification
{
	if ([[BSIPIDefaults sharedIPIDefaults] resetWhenHide]) [[self tripleGreenCubes] setSelectionIndex:NSNotFound];
}

- (void)windowWillBeginSheet:(NSNotification *)aNotification
{
	NSWindow *window_ = [aNotification object];
	m_shouldRestoreKeyWindow = [window_ isKeyWindow];
	[window_ setAlphaValue:1.0];
}

- (void)windowDidEndSheet:(NSNotification *)aNotification
{
	NSWindow *window_ = [aNotification object];
	[window_ setAlphaValue:[[BSIPIDefaults sharedIPIDefaults] alphaValue]];
	if (m_shouldRestoreKeyWindow) {
		[window_ makeKeyWindow];
	}
	m_shouldRestoreKeyWindow = NO;
}

- (void)fullScreenDidEnd:(NSWindow *)fullScreenWindow
{
	if (m_shouldRestoreKeyWindow) {
		[[self window] makeKeyWindow];
	}
	m_shouldRestoreKeyWindow = NO;
}

- (void)tokenDidFailDownload:(NSNotification *)aNotification
{
    BSIPIToken *token = [aNotification object];
    BOOL forceLeave = [[[aNotification userInfo] objectForKey:@"forceLeaving"] boolValue];
    if (forceLeave) {
        [[NSWorkspace sharedWorkspace] openURL:[token sourceURL] inBackground:[[[BSIPIDefaults sharedIPIDefaults] appDefaults] openInBg]];
    }
	if (forceLeave || ![[BSIPIDefaults sharedIPIDefaults] leaveFailedToken]) {
		[[self tripleGreenCubes] removeObject:token];
		[[self tripleGreenCubes] setSelectionIndex:NSNotFound];
	}
}

#pragma mark NSTableView Delegate
- (void)tableViewSelectionDidChange:(NSNotification *)aNotification
{
	NSTableView *tableView = [aNotification object];
	[tableView scrollRowToVisible:[tableView selectedRow]];
}

- (BOOL)tableView:(BSIPITableView *)aTableView shouldPerformKeyEquivalent:(NSEvent *)theEvent
{
	if ([aTableView selectedRow] == -1) return NO;
	
	NSInteger whichKey_ = [theEvent keyCode];

	if (whichKey_ == 51) { // delete key
		[[self tripleGreenCubes] remove:aTableView];
		return YES;
	}
	
	if (whichKey_ == 36) { // return key, option-return ro start fullscreen
		[self changePaneAndShow: aTableView];
		return YES;
	}
	return NO;
}

- (NSString *)tableView:(NSTableView *)aTableView
		 toolTipForCell:(NSCell *)aCell
				   rect:(NSRectPointer)rect
			tableColumn:(NSTableColumn *)aTableColumn
					row:(NSInteger)row
		  mouseLocation:(NSPoint)mouseLocation
{
	return [[self historyManager] toolTipStringAtIndex:row];
}

#pragma mark NSTabView Delegate
- (void)tabView:(NSTabView *)tabView willSelectTabViewItem:(NSTabViewItem *)tabViewItem
{
	NSIndexSet *tmp_ = [[self tripleGreenCubes] selectionIndexes];
	if ([tmp_ count] > 1) {
		[[self tripleGreenCubes] setSelectionIndex:[tmp_ firstIndex]];
	}
	[[BSIPIDefaults sharedIPIDefaults] setLastShownViewTag:[tabView indexOfTabViewItem:tabViewItem]];
}

#pragma mark BSIPIImageView Delegate
- (BOOL)imageView:(BSIPIImageView *)aImageView writeSomethingToPasteboard:(NSPasteboard *)pboard
{
	return [[self historyManager] appendDataForTokenAtIndexes:[[self tripleGreenCubes] selectionIndexes]
												 toPasteboard:pboard
									  withFilenamesPboardType:YES];
}

- (void)imageView:(BSIPIImageView *)aImageView mouseDoubleClicked:(NSEvent *)theEvent
{
	if ([aImageView image]) [self startFullscreen:aImageView];
}

/*- (void)imageView:(BSIPIImageView *)aImageView swiped:(NSEvent *)theEvent
{
	CGFloat dX = [theEvent deltaX];
	BSIPIArrayController *controller = [self tripleGreenCubes];
	
	if (dX == 1.0) { // 右へスワイプ
        [controller selectPrevious:aImageView];
	} else if (dX == -1.0) { // 左へスワイプ
        [controller selectNext:aImageView];
	}
}*/

- (BOOL)imageView:(BSIPIImageView *)aImageView shouldPerformKeyEquivalent:(NSEvent *)theEvent
{
	BSIPIArrayController *controller = [self tripleGreenCubes];
	NSInteger modFlags = [theEvent modifierFlags];

	NSString	*pressedKey = [theEvent charactersIgnoringModifiers];
	unichar		keyChar = 0;

	NSUInteger length = [pressedKey length];
	if (length != 1) {
		return NO;
	}

	keyChar = [pressedKey characterAtIndex:0];

	if (keyChar == NSLeftArrowFunctionKey) {
		if (modFlags & NSAlternateKeyMask) {
			[controller selectFirst:aImageView];
			return YES;
		} else if ([controller canSelectPrevious]) {
			[controller selectPrevious:aImageView];
			return YES;
		}
	}
	
	if (keyChar == NSRightArrowFunctionKey) {
		if (modFlags & NSAlternateKeyMask) {
			[controller selectLast:aImageView];
			return YES;
		} else if ([controller canSelectNext]) {
			[controller selectNext:aImageView];
			return YES;
		}
	}
	
	if (keyChar == NSDeleteCharacter) {
		[controller remove:aImageView];
		return YES;
	}

	if (keyChar == NSCarriageReturnCharacter) {
		if ([aImageView image]) {
			[self startFullscreen:aImageView];
			return YES;
		}
	}

	return NO;
}
@end
