/******************************************************************************
 * Copyright (c) 2007-2012 Transmission authors and contributors
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 *****************************************************************************/

#import "DragOverlayWindow.h"
#import "DragOverlayView.h"
#import "NSStringAdditions.h"

@interface DragOverlayWindow (Private)

- (void) resizeWindow;

@end

@implementation DragOverlayWindow

- (instancetype) initWithLib: (tr_session *) lib forWindow: (NSWindow *) window
{
    if ((self = ([super initWithContentRect: window.frame styleMask: NSBorderlessWindowMask
                    backing: NSBackingStoreBuffered defer: NO])))
    {
        fLib = lib;

        self.backgroundColor = [NSColor colorWithCalibratedWhite: 0.0 alpha: 0.5];
        self.alphaValue = 0.0;
        self.opaque = NO;
        self.hasShadow = NO;

        DragOverlayView * view = [[DragOverlayView alloc] initWithFrame: self.frame];
        self.contentView = view;

        self.releasedWhenClosed = NO;
        self.ignoresMouseEvents = YES;

        fFadeInAnimation = [[NSViewAnimation alloc] initWithViewAnimations: @[
                                                                              @{NSViewAnimationTargetKey: self,
                                                                                NSViewAnimationEffectKey: NSViewAnimationFadeInEffect}
                                                                              ]];
        fFadeInAnimation.duration = 0.15;
        fFadeInAnimation.animationBlockingMode = NSAnimationNonblockingThreaded;

        fFadeOutAnimation = [[NSViewAnimation alloc] initWithViewAnimations: @[
                                                                               @{NSViewAnimationTargetKey: self,
                                                                                 NSViewAnimationEffectKey: NSViewAnimationFadeOutEffect}
                                                                               ]];
        fFadeOutAnimation.duration = 0.5;
        fFadeOutAnimation.animationBlockingMode = NSAnimationNonblockingThreaded;

        [window addChildWindow: self ordered: NSWindowAbove];

        [NSNotificationCenter.defaultCenter addObserver: self selector: @selector(resizeWindow)
            name: NSWindowDidResizeNotification object: window];
    }
    return self;
}

- (void) dealloc
{
    [NSNotificationCenter.defaultCenter removeObserver: self];
}

- (void) setTorrents: (NSArray *) files
{
    uint64_t size = 0;
    NSInteger count = 0;

    NSString * name;
    BOOL folder;
    NSInteger fileCount = 0;

    for (NSString * file in files)
    {
        if ([[NSWorkspace.sharedWorkspace typeOfFile: file error: NULL] isEqualToString: @"org.bittorrent.torrent"]
            || [file.pathExtension caseInsensitiveCompare: @"torrent"] == NSOrderedSame)
        {
            tr_ctor * ctor = tr_ctorNew(fLib);
            tr_ctorSetMetainfoFromFile(ctor, file.UTF8String);
            tr_info info;
            if (tr_torrentParse(ctor, &info) == TR_PARSE_OK)
            {
                count++;
                size += info.totalSize;
                fileCount += info.fileCount;

                //only useful when one torrent
                if (count == 1)
                {
                    name = @(info.name);
                    folder = info.isFolder;
                }
            }
            tr_metainfoFree(&info);
            tr_ctorFree(ctor);
        }
    }

    if (count <= 0)
        return;

    //set strings and icon
    NSString * secondString = [NSString stringForFileSize: size];
    if (count > 1 || folder)
    {
        NSString * fileString;
        if (fileCount == 1)
            fileString = NSLocalizedString(@"1 file", "Drag overlay -> torrents");
        else
            fileString= [NSString stringWithFormat: NSLocalizedString(@"%@ files", "Drag overlay -> torrents"),
                            [NSString formattedUInteger: fileCount]];
        secondString = [NSString stringWithFormat: @"%@, %@", fileString, secondString];
    }

    NSImage * icon;
    if (count == 1)
        icon = [NSWorkspace.sharedWorkspace iconForFileType: folder ? NSFileTypeForHFSTypeCode(kGenericFolderIcon) : name.pathExtension];
    else
    {
        name = [NSString stringWithFormat: NSLocalizedString(@"%@ Torrent Files", "Drag overlay -> torrents"),
                [NSString formattedUInteger: count]];
        secondString = [secondString stringByAppendingString: @" total"];
        icon = [NSImage imageNamed: @"TransmissionDocument.icns"];
    }

    [self.contentView setOverlay: icon mainLine: name subLine: secondString];
    [self fadeIn];
}

- (void) setFile: (NSString *) file
{
    [self.contentView setOverlay: [NSImage imageNamed: @"CreateLarge"]
        mainLine: NSLocalizedString(@"Create a Torrent File", "Drag overlay -> file") subLine: file];
    [self fadeIn];
}

- (void) setURL: (NSString *) url
{
    [self.contentView setOverlay: [NSImage imageNamed: @"Globe"]
        mainLine: NSLocalizedString(@"Web Address", "Drag overlay -> url") subLine: url];
    [self fadeIn];
}

- (void) fadeIn
{
    //stop other animation and set to same progress
    if (fFadeOutAnimation.animating)
    {
        [fFadeOutAnimation stopAnimation];
        fFadeInAnimation.currentProgress = 1.0 - fFadeOutAnimation.currentProgress;
    }
    [fFadeInAnimation startAnimation];
}

- (void) fadeOut
{
    //stop other animation and set to same progress
    if (fFadeInAnimation.animating)
    {
        [fFadeInAnimation stopAnimation];
        fFadeOutAnimation.currentProgress = 1.0 - fFadeInAnimation.currentProgress;
    }
    if (self.alphaValue > 0.0)
        [fFadeOutAnimation startAnimation];
}

@end

@implementation DragOverlayWindow (Private)

- (void) resizeWindow
{
    [self setFrame: self.parentWindow.frame display: NO];
}

@end