/*
 * ***** BEGIN GPL LICENSE BLOCK *****
 *
 * This program 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.
 *
 * This program 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 this program; if not, write to the Free Software  Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * The Original Code is Copyright (C) 2016 Blender Foundation.
 * All rights reserved.
 *
 * ***** END GPL LICENSE BLOCK *****
 *
 */

#include "MEM_guardedalloc.h"

#include "DNA_cachefile_types.h"
#include "DNA_space_types.h"

#include "BLI_listbase.h"
#include "BLI_path_util.h"
#include "BLI_string.h"

#include "BKE_cachefile.h"
#include "BKE_context.h"
#include "BKE_global.h"
#include "BKE_library.h"
#include "BKE_main.h"
#include "BKE_report.h"

#include "RNA_access.h"

#include "UI_interface.h"

#include "WM_api.h"
#include "WM_types.h"

#include "io_cache.h"

static void cachefile_init(bContext *C, wmOperator *op)
{
	PropertyPointerRNA *pprop;

	op->customdata = pprop = MEM_callocN(sizeof(PropertyPointerRNA), "OpenPropertyPointerRNA");
	UI_context_active_but_prop_get_templateID(C, &pprop->ptr, &pprop->prop);
}

static int cachefile_open_invoke(bContext *C, wmOperator *op, const wmEvent *event)
{
	if (!RNA_struct_property_is_set(op->ptr, "filepath")) {
		char filepath[FILE_MAX];
		Main *bmain = CTX_data_main(C);

		BLI_strncpy(filepath, bmain->name, sizeof(filepath));
		BLI_replace_extension(filepath, sizeof(filepath), ".abc");
		RNA_string_set(op->ptr, "filepath", filepath);
	}

	cachefile_init(C, op);

	WM_event_add_fileselect(C, op);

	return OPERATOR_RUNNING_MODAL;

	UNUSED_VARS(event);
}

static void open_cancel(bContext *UNUSED(C), wmOperator *op)
{
	MEM_freeN(op->customdata);
	op->customdata = NULL;
}

static int cachefile_open_exec(bContext *C, wmOperator *op)
{
	if (!RNA_struct_property_is_set(op->ptr, "filepath")) {
		BKE_report(op->reports, RPT_ERROR, "No filename given");
		return OPERATOR_CANCELLED;
	}

	char filename[FILE_MAX];
	RNA_string_get(op->ptr, "filepath", filename);

	Main *bmain = CTX_data_main(C);

	CacheFile *cache_file = BKE_libblock_alloc(bmain, ID_CF, BLI_path_basename(filename), 0);
	BLI_strncpy(cache_file->filepath, filename, FILE_MAX);
	BKE_cachefile_reload(bmain, cache_file);

	/* Will be set when running invoke, not exec directly. */
	if (op->customdata != NULL) {
		/* hook into UI */
		PropertyPointerRNA *pprop = op->customdata;
		if (pprop->prop) {
			/* when creating new ID blocks, use is already 1, but RNA
			 * pointer se also increases user, so this compensates it */
			id_us_min(&cache_file->id);

			PointerRNA idptr;
			RNA_id_pointer_create(&cache_file->id, &idptr);
			RNA_property_pointer_set(&pprop->ptr, pprop->prop, idptr);
			RNA_property_update(C, &pprop->ptr, pprop->prop);
		}

		MEM_freeN(op->customdata);
	}

	return OPERATOR_FINISHED;
}

void CACHEFILE_OT_open(wmOperatorType *ot)
{
	ot->name = "Open Cache File";
	ot->description = "Load a cache file";
	ot->idname = "CACHEFILE_OT_open";

	ot->invoke = cachefile_open_invoke;
	ot->exec = cachefile_open_exec;
	ot->cancel = open_cancel;

	WM_operator_properties_filesel(ot, FILE_TYPE_ALEMBIC | FILE_TYPE_FOLDER,
	                               FILE_BLENDER, FILE_SAVE, WM_FILESEL_FILEPATH,
	                               FILE_DEFAULTDISPLAY, FILE_SORT_ALPHA);
}

/* ***************************** Reload Operator **************************** */

static int cachefile_reload_exec(bContext *C, wmOperator *op)
{
	CacheFile *cache_file = CTX_data_edit_cachefile(C);

	if (!cache_file) {
		return OPERATOR_CANCELLED;
	}

	Main *bmain = CTX_data_main(C);

	BLI_freelistN(&cache_file->object_paths);
	BKE_cachefile_reload(bmain, cache_file);

	return OPERATOR_FINISHED;

	UNUSED_VARS(op);
}

void CACHEFILE_OT_reload(wmOperatorType *ot)
{
	ot->name = "Refresh Archive";
	ot->description = "Update objects paths list with new data from the archive";
	ot->idname = "CACHEFILE_OT_reload";

	/* api callbacks */
	ot->exec = cachefile_reload_exec;

	/* flags */
	ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
}