//
//  HistoryViewController.m
//  Perforce
//
//  Created by Adam Czubernat on 12/05/14.
//  Copyright (c) 2014 Perforce Software, Inc. All rights reserved.
//

#import "HistoryViewController.h"
#import "PSCustomScrollView.h"
#import "ChangelistViewController.h"

@interface HistoryViewController () <NSTableViewDataSource, NSTableViewDelegate, NSPopoverDelegate> {
	
	P4Item *item;
	__unsafe_unretained id <P4ItemActionDelegate> actionDelegate;
	NSMutableArray *tableItems;
	BOOL loading;
	
	__weak IBOutlet NSTableView *tableView;
	__weak IBOutlet PSCustomScrollView *scrollView;
	NSPopover *popover;
}
- (IBAction)viewFilesAction:(NSButton *)sender;
- (IBAction)revertAction:(NSButton *)sender;
@end

@implementation HistoryViewController

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

- (void)dealloc {
	popover.delegate = nil;
}

- (void)loadView {
	[super loadView];
	[scrollView setScrollVerticalOnly:YES];
	
	[self reload];
}

#pragma mark - Public 

- (void)reload {
	
	loading = YES;
	tableItems = [NSMutableArray array];
	[tableView reloadData];
	
	NSString *path = item.path;
	[[P4Workspace sharedInstance]
	 listFolderVersions:path
	 response:^(P4Operation *operation, NSArray *response) {
		 
		 [tableItems addObjectsFromArray:response];
		 
		 // Add new rows
		 if (response.count)
			 [tableView insertRowsFromIndex:1 toIndex:response.count
							  withAnimation:NSTableViewAnimationEffectFade];
		 // Remove loading
		 loading = NO;
		 [tableView removeRowsFromIndex:0 toIndex:0 withAnimation:NSTableViewAnimationSlideUp];
	 }];
}

#pragma mark - Private

- (IBAction)viewFilesAction:(NSButton *)sender {
	
	NSInteger row = [tableView rowForView:sender];
	NSDictionary *tableItem = [tableItems objectAtIndex:row];
	
	NSNumber *changelist = [tableItem objectForKey:@"change"];
	ChangelistViewController *controller = [[ChangelistViewController alloc]
											initWithChangelist:changelist
											path:item.path];
	popover = [[NSPopover alloc] init];
	[popover setBehavior:NSPopoverBehaviorTransient];
	[popover setContentViewController:controller];
	[popover showRelativeToRect:[sender frame]
						 ofView:[sender superview]
				  preferredEdge:NSMaxXEdge];
	popover.delegate = self;
	
	[scrollView setScrollDisabled:YES];
}

- (IBAction)revertAction:(NSButton *)sender {

	NSInteger row = [tableView rowForView:sender];
	NSDictionary *tableItem = [tableItems objectAtIndex:row];

	NSNumber *changelist = [tableItem objectForKey:@"change"];
	[item
	 performAction:@selector(revertToChangelist:)
	 object:changelist
	 delegate:actionDelegate];
}

#pragma mark - NSTableView data source

- (NSInteger)numberOfRowsInTableView:(NSTableView *)tableView {
	return tableItems.count + loading;
}

- (CGFloat)tableView:(NSTableView *)table heightOfRow:(NSInteger)row {
	if (loading && row == 0)
		return 32.0f;
	return 172.0f;
}

- (NSView *)tableView:(NSTableView *)table viewForTableColumn:(NSTableColumn *)tableColumn row:(NSInteger)row {
	row -= loading;
	
	if (row < 0) {
		NSView *indicatorCell = [tableView makeViewWithIdentifier:@"LoadingCell" owner:self];
		[[indicatorCell.subviews lastObject] startAnimation:nil];
		return indicatorCell;
	}
	
	NSDictionary *tableItem = [tableItems objectAtIndex:row];
	NSTableCellView *cell = [tableView makeViewWithIdentifier:@"HistoryCell" owner:self];
	[cell setObjectValue:tableItem];
	if (row == 0) {
		NSButton *revertButton = [cell viewWithTag:1];
		[revertButton setHidden:YES];
	}
	return cell;
}

#pragma mark - NSPopoverDelegate

- (void)popoverDidClose:(NSNotification *)notification {
	[scrollView setScrollDisabled:NO];
}

@end