/*
 * This file is part of gitg
 *
 * Copyright (C) 2015 - Jesse van den Kieboom
 *
 * gitg is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * gitg is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with gitg. If not, see <http://www.gnu.org/licenses/>.
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include "gitg-platform-support.h"

#include <gdk/gdkquartz.h>
#include <gio/gunixinputstream.h>

#include <sys/types.h>
#include <pwd.h>

gboolean
gitg_platform_support_use_native_window_controls (GdkDisplay *display)
{
	if (display == NULL)
	{
		display = gdk_display_get_default ();
	}

	return GDK_IS_QUARTZ_DISPLAY (display);
}

void
gitg_platform_support_http_get (GFile               *file,
                                GCancellable        *cancellable,
                                GAsyncReadyCallback  callback,
                                gpointer             user_data)
{
	NSURLSessionDataTask *downloadTask;
	NSString *dataUrl;
	NSURL *url;
	GTask *task;

	dataUrl = [NSString stringWithUTF8String:g_file_get_uri (file)];
	url = [NSURL URLWithString:dataUrl];

	task = g_task_new (file, cancellable, callback, user_data);

	downloadTask = [[NSURLSession sharedSession] dataTaskWithURL:url completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
		if (g_task_return_error_if_cancelled (task))
		{
		}
		else if (error)
		{
			const gchar *message;

			message = [[error localizedDescription] UTF8String];
			g_task_return_new_error (task, G_IO_ERROR, G_IO_ERROR_FAILED, "%s", message);
		}
		else
		{
			GInputStream *stream;
			GBytes *bytes;

			bytes = g_bytes_new ([data bytes], [data length]);

			stream = g_memory_input_stream_new_from_bytes (bytes);
			g_bytes_unref (bytes);

			g_task_return_pointer (task, stream, NULL);
		}

		g_object_unref (task);
	}];
 
	[downloadTask resume];
}

GInputStream *
gitg_platform_support_http_get_finish (GAsyncResult  *result,
                                       GError       **error)
{
	return g_task_propagate_pointer (G_TASK (result), error);
}

cairo_surface_t *
gitg_platform_support_create_cursor_surface (GdkDisplay    *display,
                                             GdkCursorType  cursor_type,
                                             gint          *hot_x,
                                             gint          *hot_y,
                                             gint          *width,
                                             gint          *height)
{
	NSCursor *cursor;
	NSImage *image;
	NSBitmapImageRep *image_rep;
	const unsigned char *pixel_data;
	NSSize size;
	NSPoint hotspot;
	gint w, h;
	cairo_surface_t *surface, *target;
	cairo_t *ctx;

	switch (cursor_type)
	{
	case GDK_HAND1:
		cursor = [NSCursor pointingHandCursor];
		break;
	default:
		cursor = [NSCursor arrowCursor];
		break;
	}

	image = [cursor image];

	image_rep = [[NSBitmapImageRep alloc] initWithData:[image TIFFRepresentation]];
	pixel_data = [image_rep bitmapData];

	w = [image_rep pixelsWide];
	h = [image_rep pixelsHigh];

	hotspot = [cursor hotSpot];
	size = [image size];

	if (hot_x)
	{
		*hot_x = (gint)(hotspot.x);
	}

	if (hot_y)
	{
		*hot_y = (gint)(hotspot.y);
	}

	if (width)
	{
		*width = size.width;
	}

	if (height)
	{
		*height = size.height;
	}

	surface = cairo_image_surface_create_for_data (pixel_data, CAIRO_FORMAT_ARGB32, w, h, [image_rep bytesPerRow]);
	target = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, size.width, size.height);

	ctx = cairo_create (target);

	cairo_scale (ctx, size.width / w, size.height / h);
	cairo_set_source_surface (ctx, surface, 0, 0);
	cairo_paint (ctx);
	cairo_destroy (ctx);

	cairo_surface_destroy (surface);

	return target;
}

GInputStream *
gitg_platform_support_new_input_stream_from_fd (gint     fd,
                                                gboolean close_fd)
{
	return g_unix_input_stream_new (fd, close_fd);
}

/* FIXME: probably should use the bundle dirs? */
gchar *
gitg_platform_support_get_lib_dir (void)
{
	return g_strdup (GITG_LIBDIR);
}

gchar *
gitg_platform_support_get_locale_dir (void)
{
	return g_strdup (GITG_LOCALEDIR);
}

gchar *
gitg_platform_support_get_data_dir (void)
{
	return g_strdup (GITG_DATADIR);
}

gchar *
gitg_platform_support_get_user_home_dir (const gchar *name)
{
	struct passwd *pwd;

	if (name == NULL)
	{
		name = g_get_user_name ();
	}

	if (name == NULL)
	{
		return NULL;
	}

	pwd = getpwnam (name);

	if (pwd == NULL)
	{
		return NULL;
	}

	return g_strdup (pwd->pw_dir);
}

// ex:ts=4 noet