#include <stdio.h>
#include <stdbool.h>
#include <string.h>
#include "interfaces/openbmc_intf.h"
#include "openbmc.h"
#include "object_mapper.h"

/* ---------------------------------------------------------------------------------------------------- */
static const gchar* dbus_object_path = "/org/openbmc/control/flash";
static const gchar* dbus_name        = "org.openbmc.control.Flash";
static const gchar* FLASHER_BIN      = "flasher.exe";
static const gchar* DLOAD_BUS = "org.openbmc.managers.Download";
static const gchar* DLOAD_OBJ = "/org/openbmc/managers/Download";

static GDBusObjectManagerServer *manager = NULL;

void catch_child(int sig_num)
{
    /* when we get here, we know there's a zombie child waiting */
    int child_status;

    wait(&child_status);
    printf("flasher exited.\n");
}


int update(Flash* flash, const char* obj_path)
{
	pid_t pid;
	int status=-1;
	pid = fork();
	if (pid == 0)
	{
		const gchar* path = flash_get_flasher_path(flash);
		const gchar* name = flash_get_flasher_name(flash);
		const gchar* inst = flash_get_flasher_instance(flash);
		const gchar* filename = flash_get_filename(flash);
		status = execl(path, name, inst, filename, obj_path, NULL);
		return status;
	}
	return 0;
}

static gboolean
on_init (Flash          *f,
                GDBusMethodInvocation  *invocation,
                gpointer                user_data)
{
	flash_complete_init(f,invocation);

	//tune flash
	if (strcmp(flash_get_flasher_instance(f),"bios") == 0)
	{
		flash_set_filename(f,"");
		const gchar* obj_path = g_dbus_object_get_object_path((GDBusObject*)user_data);
		int rc = update(f,obj_path);
		if (rc==-1)
		{
			printf("ERROR FlashControl: Unable to init\n");
		}
		sleep(3);
		rc = update(f,obj_path);
		
	}
	return TRUE;
}

static gboolean
on_lock (SharedResource          *lock,
                GDBusMethodInvocation  *invocation,
		gchar*                  name,
                gpointer                user_data)
{
	gboolean locked = shared_resource_get_lock(lock);
	if (locked)
	{
		const gchar* name = shared_resource_get_name(lock);
		printf("ERROR: BIOS Flash is already locked: %s\n",name);
	}
	else
	{	
		printf("Locking BIOS Flash: %s\n",name);
		shared_resource_set_lock(lock,true);
		shared_resource_set_name(lock,name);
	}
	shared_resource_complete_lock(lock,invocation);
	return TRUE;
}
static gboolean
on_is_locked (SharedResource          *lock,
                GDBusMethodInvocation  *invocation,
                gpointer                user_data)
{
	gboolean locked = shared_resource_get_lock(lock);
	const gchar* name = shared_resource_get_name(lock);
	shared_resource_complete_is_locked(lock,invocation,locked,name);
	return TRUE;
}


static gboolean
on_unlock (SharedResource          *lock,
                GDBusMethodInvocation  *invocation,
                gpointer                user_data)
{
	printf("Unlocking BIOS Flash\n");
	shared_resource_set_lock(lock,false);
	shared_resource_set_name(lock,"");
	shared_resource_complete_unlock(lock,invocation);
	return TRUE;
}

static gboolean
on_update_via_tftp (Flash          *flash,
                GDBusMethodInvocation  *invocation,
                gchar*                  url,
                gchar*                  write_file,
                gpointer                user_data)
{
	SharedResource *lock = object_get_shared_resource((Object*)user_data);
	gboolean locked = shared_resource_get_lock(lock);
	flash_complete_update_via_tftp(flash,invocation);
	if (locked)
	{
		const gchar* name = shared_resource_get_name(lock);
		printf("BIOS Flash is locked: %s\n",name);
	}
	else
	{	
		printf("Flashing BIOS from TFTP: %s,%s\n",url,write_file);
		flash_set_filename(flash,write_file);
		flash_emit_download(flash,url,write_file);
		flash_set_status(flash,"Downloading");
	}
	return TRUE;
}

static gboolean
on_error        (Flash          *flash,
                GDBusMethodInvocation  *invocation,
                gchar*                  error_msg,
                gpointer                user_data)
{
	int rc = 0;
	SharedResource *lock = object_get_shared_resource((Object*)user_data);
	gboolean locked = shared_resource_get_lock(lock);
	flash_set_status(flash, error_msg);
	flash_complete_error(flash,invocation);
	printf("ERROR: %s.  Clearing locks\n",error_msg);
	shared_resource_set_lock(lock,false);
	shared_resource_set_name(lock,"");
	
	return TRUE;
}
static gboolean
on_done        (Flash          *flash,
                GDBusMethodInvocation  *invocation,
                gpointer                user_data)
{
	int rc = 0;
	SharedResource *lock = object_get_shared_resource((Object*)user_data);
	gboolean locked = shared_resource_get_lock(lock);
	flash_set_status(flash, "Flash Done");
	flash_complete_done(flash,invocation);
	printf("Flash Done. Clearing locks\n");
	shared_resource_set_lock(lock,false);
	shared_resource_set_name(lock,"");
	const gchar* filename = flash_get_filename(flash);
	rc = unlink(filename);
	if (rc != 0 )
	{
		printf("ERROR: Unable to delete file %s (%d)\n",filename,rc);
	}
	
	return TRUE;
}


static gboolean
on_update (Flash          *flash,
                GDBusMethodInvocation  *invocation,
                gchar*                  write_file,
                gpointer                user_data)
{
	int rc = 0;
	SharedResource *lock = object_get_shared_resource((Object*)user_data);
	gboolean locked = shared_resource_get_lock(lock);
	flash_set_status(flash,"Flashing");
	flash_complete_update(flash,invocation);
	if (locked)
	{
		const gchar* name = shared_resource_get_name(lock);
		printf("BIOS Flash is locked: %s\n",name);
	}
	else
	{	
		printf("Flashing BIOS from: %s\n",write_file);
		flash_set_status(flash, "Flashing");
		shared_resource_set_lock(lock,true);
		shared_resource_set_name(lock,dbus_object_path);
		flash_set_filename(flash,write_file);
		const gchar* obj_path = g_dbus_object_get_object_path((GDBusObject*)user_data);
		rc = update(flash,obj_path);
		if (!rc)
		{
			shared_resource_set_lock(lock,false);
			shared_resource_set_name(lock,"");
		}
	}
	return TRUE;
}
static void
on_flash_progress (GDBusConnection* connection,
               const gchar* sender_name,
               const gchar* object_path,
               const gchar* interface_name,
               const gchar* signal_name,
               GVariant* parameters,
               gpointer user_data) 
{
	Flash *flash = object_get_flash((Object*)user_data);
	SharedResource *lock = object_get_shared_resource((Object*)user_data);
	GVariantIter *iter = g_variant_iter_new(parameters);
	GVariant* v_filename = g_variant_iter_next_value(iter);
	GVariant* v_progress = g_variant_iter_next_value(iter);
	
	uint8_t progress = g_variant_get_byte(v_progress);

	gchar *s;
	s = g_strdup_printf ("Flashing: %d%%",progress);
	flash_set_status(flash,s);
	g_free(s);
}

static void
on_flash_done (GDBusConnection* connection,
               const gchar* sender_name,
               const gchar* object_path,
               const gchar* interface_name,
               const gchar* signal_name,
               GVariant* parameters,
               gpointer user_data) 
{
	Flash *flash = object_get_flash((Object*)user_data);
	SharedResource *lock = object_get_shared_resource((Object*)user_data);
	printf("Flash succeeded; unlocking flash\n");
	shared_resource_set_lock(lock,false);
	shared_resource_set_name(lock,"");
	flash_set_status(flash,"Flash Done");
}

static void
on_flash_error (GDBusConnection* connection,
               const gchar* sender_name,
               const gchar* object_path,
               const gchar* interface_name,
               const gchar* signal_name,
               GVariant* parameters,
               gpointer user_data) 
{
	Flash *flash = object_get_flash((Object*)user_data);
	SharedResource *lock = object_get_shared_resource((Object*)user_data);
	printf("Flash Error; unlocking flash\n");
	shared_resource_set_lock(lock,false);
	shared_resource_set_name(lock,"");
}

static void
on_download_error (GDBusConnection* connection,
               const gchar* sender_name,
               const gchar* object_path,
               const gchar* interface_name,
               const gchar* signal_name,
               GVariant* parameters,
               gpointer user_data) 
{
	Flash *flash = object_get_flash((Object*)user_data);
	SharedResource *lock = object_get_shared_resource((Object*)user_data);
	printf("ERROR: FlashBios:  Download error; clearing flash lock\n");
	shared_resource_set_lock(lock,false);
	shared_resource_set_name(lock,"");
}

static void 
on_bus_acquired (GDBusConnection *connection,
                 const gchar     *name,
                 gpointer         user_data)
{
	ObjectSkeleton *object;
 	cmdline *cmd = user_data;
  	manager = g_dbus_object_manager_server_new (dbus_object_path);
  	int i=0;

	//TODO: don't use fixed buffer
	char flasher_path[512];
	memset(flasher_path, '\0', sizeof(flasher_path));
	bool found = false;
	gchar *flasher_file;
	int c = strlen(cmd->argv[0]);
	while(c>0)
	{
		if (cmd->argv[0][c] == '/')
		{
			strncpy(flasher_path,cmd->argv[0],c);
			flasher_file = g_strdup_printf ("%s/%s",flasher_path,FLASHER_BIN);
			break;
		}
		c--;
	}

	const char* inst[] = {"bios"};
  	for (i=0;i<1;i++)
  	{
		gchar* s;
		s = g_strdup_printf ("%s/%s",dbus_object_path,inst[i]);
		object = object_skeleton_new (s);
		g_free (s);

		Flash* flash = flash_skeleton_new ();
		object_skeleton_set_flash (object, flash);
 		g_object_unref (flash);

		SharedResource* lock = shared_resource_skeleton_new ();
		object_skeleton_set_shared_resource (object, lock);
 		g_object_unref (lock);

		ObjectMapper* mapper = object_mapper_skeleton_new ();
		object_skeleton_set_object_mapper (object, mapper);
		g_object_unref (mapper);

		shared_resource_set_lock(lock,false);
		shared_resource_set_name(lock,"");

		flash_set_flasher_path(flash,flasher_file);
		flash_set_flasher_name(flash,FLASHER_BIN);
		flash_set_flasher_instance(flash,inst[i]);
		//g_free (s);


		//define method callbacks here
		g_signal_connect (lock,
                    "handle-lock",
                    G_CALLBACK (on_lock),
                    NULL); /* user_data */
		g_signal_connect (lock,
                    "handle-unlock",
                    G_CALLBACK (on_unlock),
                    NULL); /* user_data */
		g_signal_connect (lock,
                    "handle-is-locked",
                    G_CALLBACK (on_is_locked),
                    NULL); /* user_data */

		g_signal_connect (flash,
                    "handle-update",
                    G_CALLBACK (on_update),
                    object); /* user_data */

		g_signal_connect (flash,
                    "handle-error",
                    G_CALLBACK (on_error),
                    object); /* user_data */

		g_signal_connect (flash,
                    "handle-done",
                    G_CALLBACK (on_done),
                    object); /* user_data */

		g_signal_connect (flash,
                    "handle-update-via-tftp",
                    G_CALLBACK (on_update_via_tftp),
                    object); /* user_data */

		g_signal_connect (flash,
                    "handle-init",
                    G_CALLBACK (on_init),
                    object); /* user_data */

		s = g_strdup_printf ("/org/openbmc/control/%s",inst[i]);
		g_dbus_connection_signal_subscribe(connection,
                                   NULL,
                                   "org.openbmc.FlashControl",
                                   "Progress",
                                   s,
                                   NULL,
                                   G_DBUS_SIGNAL_FLAGS_NONE,
                                   (GDBusSignalCallback) on_flash_progress,
                                   object,
                                   NULL );

		g_free (s);

 
		flash_set_filename(flash,"");
		/* Export the object (@manager takes its own reference to @object) */
		g_dbus_object_manager_server_export (manager, G_DBUS_OBJECT_SKELETON (object));
  		g_object_unref (object);
	}
	g_free(flasher_file);
	/* Export all objects */
	g_dbus_object_manager_server_set_connection (manager, connection);
	emit_object_added((GDBusObjectManager*)manager); 
}

static void
on_name_acquired (GDBusConnection *connection,
                  const gchar     *name,
                  gpointer         user_data)
{
//  g_print ("Acquired the name %s\n", name);
}

static void
on_name_lost (GDBusConnection *connection,
              const gchar     *name,
              gpointer         user_data)
{
  //g_print ("Lost the name %s\n", name);
}

gint
main (gint argc, gchar *argv[])
{
  GMainLoop *loop;
  cmdline cmd;
  cmd.argc = argc;
  cmd.argv = argv;
  guint id;
  loop = g_main_loop_new (NULL, FALSE);

  //signal(SIGCHLD, catch_child);
  id = g_bus_own_name (DBUS_TYPE,
                       dbus_name,
                       G_BUS_NAME_OWNER_FLAGS_ALLOW_REPLACEMENT |
                       G_BUS_NAME_OWNER_FLAGS_REPLACE,
                       on_bus_acquired,
                       on_name_acquired,
                       on_name_lost,
                       &cmd,
                       NULL);

  g_main_loop_run (loop);
  
  g_bus_unown_name (id);
  g_main_loop_unref (loop);
  return 0;
}