//
//  ColumnViewDetails.m
//  Perforce
//
//  Created by Adam Czubernat on 03.06.2013.
//  Copyright (c) 2013 Perforce Software, Inc. All rights reserved.
//

#import "ColumnViewDetails.h"
#import "TagsView.h"
#import "VersionsViewController.h"

const char * DetailsGlobalQueueLabel = "com.perforce.PreviewQueue";
dispatch_queue_t DetailsGlobalQueue = NULL;

@interface ColumnViewDetails () <NSMenuDelegate> {
	
	P4Item *item;
	__unsafe_unretained id <P4ItemActionDelegate> actionDelegate;
	
	NSImage *image;
	NSArray *itemActions;
		
	VersionsViewController *versionsController;
	
	// Outlets
	
	__weak IBOutlet PSView *contentView;
	__weak IBOutlet NSScrollView *contentScrollView;
	
	__weak IBOutlet NSTextField *versionLabel;
	__weak IBOutlet NSTextField *titleLabel;
	__weak IBOutlet PSView *versionSeparator;
	__weak IBOutlet PSView *titleSeparator;
	
	__weak IBOutlet PSView *imageView;
	__weak IBOutlet NSView *actionsHeader;
	__weak IBOutlet NSTextField *actionsHeaderTitle;
	__weak IBOutlet NSView *tagsHeader;
	__weak IBOutlet NSTextField *tagsHeaderTitle;
	__weak IBOutlet TagsView *tagsView;
	
	IBOutlet NSView *prototypeMetadataView;
	__weak IBOutlet NSTextField *prototypeMetadataTitle;
	__weak IBOutlet NSTextField *prototypeMetadataValue;
	
	IBOutlet NSView *prototypeActionView;
	__weak IBOutlet NSImageView *prototypeActionImage;
	__weak IBOutlet NSTextField *prototypeActionTitle;
	__weak IBOutlet NSButton *prototypeActionButton;
	__weak IBOutlet PSView *prototypeActionSeparator;
}

- (void)loadDirectoryItem;
- (void)loadFileItem;
- (void)loadImage;

- (void)setRevision:(NSString *)revision;
- (NSView *)addPrototypeView:(NSView *)prototype;
- (void)fitSubviews;
- (void)addMetadataWithTitle:(NSString *)title value:(NSString *)value;
- (void)addAction:(P4ItemAction *)action;
@end

@implementation ColumnViewDetails

static NSImage *horizontalSeparatorImage;
static NSColor *backgroundColor;
static NSColor *selectionColor;
static NSColor *textColor;
static NSColor *textColorSelected;
static NSColor *textColorSecondary;
static NSColor *textColorTag;
static NSColor *textColorCheckedOut;

- (id)initWithItem:(P4Item *)anItem actionDelegate:(id<P4ItemActionDelegate>)delegate {
	if (self = [self initWithNibName:NSStringFromClass([self class]) bundle:nil]) {
		item = anItem;
		actionDelegate = delegate;
	}
	return self;
}

- (void)showVersions {
	
	if (versionsController)
		[versionsController.view removeFromSuperview];
	versionsController = [[VersionsViewController alloc]
						  initWithItem:item
						  actionDelegate:actionDelegate];
	
	CGRect frame = versionsController.view.frame;
	frame.origin.x = contentScrollView.frame.size.width;
	frame.size.height = self.view.frame.size.height;
	versionsController.view.frame = frame;
	[self.view addSubview:versionsController.view];
	
	frame = self.view.frame;
	frame.size.width = CGRectGetMaxX(versionsController.view.frame);
	self.view.frame = frame;
}


- (void)loadView {
	[super loadView];
	
	// Load images and colors
	static dispatch_once_t onceToken;
	dispatch_once(&onceToken, ^{
		horizontalSeparatorImage = [NSImage imageNamed:@"SeparatorHorizontalDark.png"];
		horizontalSeparatorImage = [horizontalSeparatorImage resizableImageWithLeftCap:10.0f rightCap:1.0f];		
		backgroundColor = [NSUserDefaults colorForKey:kColorBackgroundColumn];
		selectionColor = [NSUserDefaults colorForKey:kColorBackgroundColumnSelected];
		textColor = [NSUserDefaults colorForKey:kColorTextColumn];
		textColorSelected = [NSUserDefaults colorForKey:kColorTextColumnSelected];
		textColorSecondary = [NSUserDefaults colorForKey:kColorTextIconSecondary];
		textColorTag = [NSUserDefaults colorForKey:kColorBackgroundTagDark];
		textColorCheckedOut = [NSUserDefaults colorForKey:kColorStatusCheckedOut];
	});
	
	// Set images and colors
	
	[contentScrollView setBackgroundColor:backgroundColor];
	
	[titleSeparator setImage:horizontalSeparatorImage];
	[titleSeparator setContentMode:PSViewContentModeFillHorizontal];
	[prototypeActionSeparator setImage:horizontalSeparatorImage];
	[prototypeActionSeparator setContentMode:PSViewContentModeFillHorizontal];
	[versionSeparator setBackgroundColor:textColorCheckedOut];
	
	titleLabel.textColor =
	prototypeMetadataValue.textColor =
	prototypeActionTitle.textColor = textColor;
	
	prototypeMetadataTitle.textColor =
	actionsHeaderTitle.textColor =
	tagsHeaderTitle.textColor = textColorSecondary;
	
	versionLabel.textColor = textColorCheckedOut;
	
	// Load determined by type
	if ([item isDirectory])
		[self loadDirectoryItem];
	else
		[self loadFileItem];
	
	// Load common values for two types
	titleLabel.stringValue = item.name;
	
	itemActions = item.actions;
	for (P4ItemAction *action in itemActions) {
		[self addAction:action];
	}
	
	if ((!item.isTracked || item.isDirectory) &&
		![item.status isEqualToString:@"add"] &&
		![item.status isEqualToString:@"move/add"]) {
		
		[tagsHeader removeFromSuperview];
		[tagsView removeFromSuperview];
		tagsHeader = tagsView = nil;

	} else {

		[tagsView setAllowsAdding:item.isEditable || item.status];
		[tagsView setItem:item];
	}

	// Resize content view
	[self fitSubviews];
	
	// Remove prototypes
	[self removePrototypeView:prototypeMetadataView];
	[self removePrototypeView:prototypeActionView];
	
	[self loadImage];
}

#pragma mark - Private

- (void)loadDirectoryItem {
	[self setRevision:nil];
}

- (void)loadFileItem {
	
	NSDictionary *metadata = item.metadata;
	[self setRevision:[metadata objectForKey:@"haveRev"]];

	// Add concretes
	NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
	formatter.dateStyle = NSDateFormatterLongStyle;

	if (!item.isTracked)
		[self addMetadataWithTitle:@"UNTRACKED" value:@""];

	if (item.isTracked) {
		NSNumber *headTime = [metadata objectForKey:@"headModTime"];
		NSDate *headDate = headTime ? [NSDate dateWithTimeIntervalSince1970:
									   headTime.doubleValue] : nil;
		[self addMetadataWithTitle:@"MODIFIED IN" value:[formatter stringFromDate:headDate]];
		
		if (item.status) {
			[self addMetadataWithTitle:@"CHECKED OUT BY" value:@"You"];
		} else if (item.statusOwner) {
						
			prototypeMetadataTitle.stringValue = @"CHECKED OUT BY";
			[prototypeMetadataValue setAttributedStringValue:
			 [[NSAttributedString alloc]
			  initWithString:item.statusOwner
			  attributes:@{
			  NSFontAttributeName : prototypeMetadataValue.font,
			  NSUnderlineStyleAttributeName : @(NSSingleUnderlineStyle),
			  NSLinkAttributeName : [NSString stringWithFormat:@"mailto:%@", item.statusOwner],
			  }]];
			[prototypeMetadataValue setAllowsEditingTextAttributes:YES];
			[prototypeMetadataValue setSelectable:YES];
			[self addPrototypeView:prototypeMetadataView];
			
		} else
			[self addMetadataWithTitle:@"CHECKED IN" value:@"Available"];
	}
	
	if (item.status)
		[self addMetadataWithTitle:@"ACTION" value:item.status];

	NSString *movedFile = [item.metadata objectForKey:@"movedFile"];
	if (movedFile.length) {
		NSString *parentPath = [item.remotePath stringByDeletingPath];
		if ([[movedFile stringByDeletingPath] isEqualToString:parentPath])
			[self addMetadataWithTitle:@"RENAMED FROM" value:[movedFile lastPathComponent]];
		else if ([item.status isEqualToString:@"move/delete"])
			[self addMetadataWithTitle:@"MOVED TO" value:movedFile];
		else
			[self addMetadataWithTitle:@"MOVED FROM" value:movedFile];
	}
}

- (void)loadImage {
	
	if (!imageView)
		return;
	
	// Load image asynchronously
	static dispatch_once_t onceToken;
	dispatch_once(&onceToken, ^{
		DetailsGlobalQueue = dispatch_queue_create(DetailsGlobalQueueLabel, NULL);
	});
	
	dispatch_async(DetailsGlobalQueue, ^{
		if (!image)
			image = [item previewWithSize:imageView.bounds.size];
		dispatch_async(dispatch_get_main_queue(), ^{
			imageView.image = image;
		});
	});
}

- (void)setRevision:(NSString *)revision {
	
	if (!revision) {
		titleLabel.frame = CGRectUnion(titleLabel.frame, versionLabel.frame);
		[versionLabel removeFromSuperview];
		[versionSeparator removeFromSuperview];
		return;
	}
	
	versionLabel.stringValue = [NSString stringWithFormat:@"V.%@", revision];
	[versionLabel sizeToFit];
	
	CGFloat offset = CGRectGetMaxX(versionLabel.frame) + 6.0f;
	
	CGRect frame = versionSeparator.frame;
	frame.origin.x = offset;
	versionSeparator.frame = frame;
	
	offset += 8.0f;
	
	frame = titleLabel.frame;
	frame.size.width = CGRectGetMaxX(frame) - offset;
	frame.origin.x = offset;
	titleLabel.frame = frame;
}

- (NSView *)addPrototypeView:(NSView *)prototype {
	
	NSData *archivedView = [NSKeyedArchiver archivedDataWithRootObject:prototype];
	NSView *copy = [NSKeyedUnarchiver unarchiveObjectWithData:archivedView];
	
	if (prototype.superview) {
		[prototype removeFromSuperview];
	} else {
		// Move subviews below
		CGFloat height = copy.frame.size.height;
		CGFloat offset = copy.frame.origin.y + height;
		for (NSView *subview in contentView.subviews) {
			CGRect frame = subview.frame;
			if (frame.origin.y >= offset)
				continue;
			frame.origin.y -= height;
			subview.frame = frame;
		}
	}
	
	CGRect frame = prototype.frame;
	frame.origin.y -= frame.size.height;
	prototype.frame = frame;
	
	[contentView addSubview:copy];
	return copy;
}

- (void)removePrototypeView:(NSView *)prototype {
	if (!prototype.superview)
		return;

	[prototype removeFromSuperview];
	CGFloat height = prototype.frame.size.height;
	CGFloat offset = prototype.frame.origin.y + height;
	
	for (NSView *subview in contentView.subviews) {
		CGRect frame = subview.frame;
		if (frame.origin.y >= offset)
			continue;
		frame.origin.y += height;
		subview.frame = frame;
	}
}

- (void)fitSubviews {
	
	CGFloat min = 0.0f;
	for (NSView *subview in contentView.subviews) {
		min = fminf(subview.frame.origin.y, min);
	}
	
	if (min > 0.0f)
		return;
	
	// Resize content container to fit
	CGRect frame = contentView.frame;
	frame.size.height -= min;
	contentView.frame = frame;
}

- (void)addMetadataWithTitle:(NSString *)title value:(NSString *)value {
	
	if (!title || !value)
		return;
	
	prototypeMetadataTitle.stringValue = title;
	prototypeMetadataValue.stringValue = value;
	
	[self addPrototypeView:prototypeMetadataView];
}

- (void)addAction:(P4ItemAction *)action {	
	if (action.disabled)
		return;
	
	action.delegate = actionDelegate;
	
	NSImage *actionImage;
	SEL actionSelector = action.selector;
	
	if (actionSelector == @selector(open)) {
		actionImage = [NSImage imageNamed:@"IconReadonlyDark48"];
	} else if (actionSelector == @selector(openWithCheckout)) {
		actionImage = [NSImage imageNamed:@"IconOpenDark"];
	} else if (actionSelector == @selector(openFromDepot)) {
		actionImage = [NSImage imageNamed:@"IconOpenFromDepotDark"];
	} else if (actionSelector == @selector(addItem)) {
		actionImage = [NSImage imageNamed:@"IconMarkForAddDark"];
	} else if (actionSelector == @selector(revertIfUnchanged)) {
		actionImage = [NSImage imageNamed:@"IconUndoCheckoutDark"];
	} else if (actionSelector == @selector(mapToWorkspace)) {
		actionImage = [NSImage imageNamed:@"IconMapToWorkspaceDark"];
	} else if (actionSelector == @selector(unmapFromWorkspace)) {
		actionImage = [NSImage imageNamed:@"IconUnmapFromWorkspaceDark"];
	} else if (actionSelector == @selector(shelve)) {
		actionImage = [NSImage imageNamed:@"IconShelveDark"];
	} else if (actionSelector == @selector(unshelve)) {
		actionImage = [NSImage imageNamed:@"IconUnshelveDark"];
	} else if (actionSelector == @selector(discardShelve)) {
		actionImage = [NSImage imageNamed:@"IconShelveDiscardDark"];
	} else if (actionSelector == @selector(showVersions)) {
		actionImage = [NSImage imageNamed:@"IconVersionsDark"];
	} else if (actionSelector == @selector(createDirectory)) {
		actionImage = [NSImage imageNamed:@"IconNewDirectoryDark"];
	} else if (actionSelector == @selector(showInFinder)) {
		actionImage = [NSImage imageNamed:@"IconFinderDark48.png"];
	} else if (actionSelector == @selector(deleteItem)) {
		actionImage = [NSImage imageNamed:@"IconTrashDark48.png"];
	} else if (actionSelector == @selector(checkIn) ||
			   actionSelector == @selector(checkInAll)) {
		actionImage = [NSImage imageNamed:@"IconCheckinDark48.png"];
	} else if (actionSelector == @selector(checkout)) {
		actionImage = [NSImage imageNamed:@"IconCheckoutDark48.png"];
	} else if (actionSelector == @selector(open)) {
		actionImage = [NSImage imageNamed:@"IconReadonlyDark48.png"];
	} else if (actionSelector == @selector(revert)) {
		actionImage = [NSImage imageNamed:@"IconRevertDark.png"];
	} else if (actionSelector == @selector(copyShareLink)) {
		actionImage = [NSImage imageNamed:@"IconCopyLinkDark"];
	} else {
		actionImage = [NSImage imageNamed:@"IconFavoriteDark.png"];
	}
		
	prototypeActionTitle.stringValue = action.name;
	prototypeActionImage.image = actionImage;
	prototypeActionButton.tag = 666; // Number of the Beast
	prototypeActionButton.alphaValue = 0.5f;
	
	NSView *copy = [self addPrototypeView:prototypeActionView];
	
	NSButton *actionButton = [copy viewWithTag:666];
	[actionButton setTarget:action];
	[actionButton setAction:@selector(performAction)];
}

#pragma mark - Menu delegate

- (void)menuWillOpen:(NSMenu *)menu {
	[menu setAllowsContextMenuPlugIns:NO];
	[menu setItem:item delegate:[self.view.window windowController]];
}

@end