/*
 * deviced
 *
 * Copyright (c) 2012 - 2013 Samsung Electronics Co., Ltd.
 *
 * Licensed under the Apache License, Version 2.0 (the License);
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */


#include <stdio.h>
#include <errno.h>
#include <dlfcn.h>

#include "include/ss_data.h"
#include "core/list.h"
#include "ss_log.h"

#define APP2EXT_PLUGIN_PATH	LIBDIR"/libapp2ext.so.0"

static void *app2ext_dl;
static int (*app2ext_enable)(const char *pkgid);
static int (*app2ext_disable)(const char *pkgid);

static dd_list *pkgid_head;

static int app2ext_mount(const char *pkgid)
{
	int r;

	if (!app2ext_enable)
		return -ENOENT;

	PRT_TRACE_ERR("Attempt mount %s app to sdcard", pkgid);
	r = app2ext_enable(pkgid);
	if (r < 0)
		return r;

	PRT_TRACE_ERR("Mount %s app to sdcard", pkgid);
	DD_LIST_APPEND(pkgid_head, strdup(pkgid));
	return 0;
}

int app2ext_unmount(void)
{
	char *str;
	dd_list *elem;
	int r, n, i;

	if (!app2ext_disable)
		return -ENOENT;

	/* if there is no mounted pkg */
	if (!pkgid_head)
		return 0;

	n = DD_LIST_LENGTH(pkgid_head);
	PRT_TRACE_ERR("pkgid_head count : %d", n);

	for (i = 0; i < n; ++i) {
		str = DD_LIST_NTH(pkgid_head, 0);
		PRT_TRACE_ERR("Attempt unmount %s app from sdcard", str);
		r = app2ext_disable(str);
		if (r < 0)
			return r;
		PRT_TRACE_ERR("Unmount %s app from sdcard", str);
		DD_LIST_REMOVE(pkgid_head, str);
		free(str);
	}

	return 0;
}

static int mmc_mount_app2ext(int argc, char **argv)
{
	char *pkgid;

	if (argc < 1)
		return -EINVAL;

	if (!mmc_check_mounted(MMC_MOUNT_POINT)) {
		PRT_TRACE_ERR("Do not mounted");
		return -ENODEV;
	}

	pkgid = argv[0];
	return app2ext_mount(pkgid);
}

void app2ext_init(void)
{
	int ret;

	app2ext_dl = dlopen(APP2EXT_PLUGIN_PATH, RTLD_LAZY|RTLD_GLOBAL);
	if (!app2ext_dl) {
		PRT_TRACE_ERR("dlopen error (%s)", dlerror());
		return;
	}

	app2ext_enable = dlsym(app2ext_dl, "app2ext_enable_external_pkg");
	if (!app2ext_enable) {
		PRT_TRACE_ERR("dlsym error (%s)", dlerror());
		dlclose(app2ext_dl);
		app2ext_dl = NULL;
		return;
	}

	app2ext_disable = dlsym(app2ext_dl, "app2ext_disable_external_pkg");
	if (!app2ext_disable) {
		PRT_TRACE_ERR("dlsym error (%s)", dlerror());
		dlclose(app2ext_dl);
		app2ext_dl = NULL;
		return;
	}

	ss_action_entry_add_internal(PREDEF_MOUNT_APP2EXT, mmc_mount_app2ext, NULL, NULL);
}

void app2ext_exit(void)
{
	if(!app2ext_dl)
		return;

	dlclose(app2ext_dl);
	app2ext_dl = NULL;
}