/*
 * ***** 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) 2001-2002 by NaN Holding BV.
 * All rights reserved.
 *
 * The Original Code is: all of this file.
 *
 * Contributor(s): none yet.
 *
 * ***** END GPL LICENSE BLOCK *****
 */

/** \file blender/blenkernel/intern/blender.c
 *  \ingroup bke
 *
 * Application level startup/shutdown functionality.
 */

#include <stdlib.h>
#include <stdio.h>
#include <string.h>

#include "MEM_guardedalloc.h"

#include "BLI_string.h"
#include "BLI_listbase.h"
#include "BLI_utildefines.h"
#include "BLI_callbacks.h"

#include "IMB_imbuf.h"
#include "IMB_moviecache.h"

#include "BKE_blender.h"  /* own include */
#include "BKE_blender_version.h"  /* own include */
#include "BKE_blendfile.h"
#include "BKE_brush.h"
#include "BKE_cachefile.h"
#include "BKE_context.h"
#include "BKE_depsgraph.h"
#include "BKE_global.h"
#include "BKE_idprop.h"
#include "BKE_image.h"
#include "BKE_library.h"
#include "BKE_node.h"
#include "BKE_report.h"
#include "BKE_scene.h"
#include "BKE_screen.h"
#include "BKE_sequencer.h"

#include "RE_pipeline.h"
#include "RE_render_ext.h"

#include "BLF_api.h"


Global G;
UserDef U;

char versionstr[48] = "";

/* ********** free ********** */

/* only to be called on exit blender */
void BKE_blender_free(void)
{
	/* samples are in a global list..., also sets G.main->sound->sample NULL */
	BKE_main_free(G.main);
	G.main = NULL;

	BKE_spacetypes_free();      /* after free main, it uses space callbacks */
	
	IMB_exit();
	BKE_cachefiles_exit();
	BKE_images_exit();
	DAG_exit();

	BKE_brush_system_exit();
	RE_texture_rng_exit();	

	BLI_callback_global_finalize();

	BKE_sequencer_cache_destruct();
	IMB_moviecache_destruct();
	
	free_nodesystem();
}

void BKE_blender_version_string(char *version_str, size_t maxncpy, short version, short subversion, bool v_prefix, bool include_subversion)
{
	const char *prefix = v_prefix ? "v" : "";

	if (include_subversion && subversion > 0) {
		BLI_snprintf(version_str, maxncpy, "%s%d.%02d.%d", prefix, version / 100, version % 100, subversion);
	}
	else {
		BLI_snprintf(version_str, maxncpy, "%s%d.%02d", prefix, version / 100, version % 100);
	}
}

void BKE_blender_globals_init(void)
{
	memset(&G, 0, sizeof(Global));
	
	U.savetime = 1;

	G.main = BKE_main_new();

	strcpy(G.ima, "//");

	BKE_blender_version_string(versionstr, sizeof(versionstr), BLENDER_VERSION, BLENDER_SUBVERSION, true, true);

#ifndef WITH_PYTHON_SECURITY /* default */
	G.f |= G_SCRIPT_AUTOEXEC;
#else
	G.f &= ~G_SCRIPT_AUTOEXEC;
#endif
}

void BKE_blender_globals_clear(void)
{
	BKE_main_free(G.main);          /* free all lib data */

	G.main = NULL;
}

/***/

static void keymap_item_free(wmKeyMapItem *kmi)
{
	if (kmi->properties) {
		IDP_FreeProperty(kmi->properties);
		MEM_freeN(kmi->properties);
	}
	if (kmi->ptr)
		MEM_freeN(kmi->ptr);
}

void BKE_blender_userdef_set_data(UserDef *userdef)
{
	/* only here free userdef themes... */
	BKE_blender_userdef_free_data(&U);
	U = *userdef;
}

static void userdef_free_keymaps(UserDef *userdef)
{
	for (wmKeyMap *km = userdef->user_keymaps.first, *km_next; km; km = km_next) {
		km_next = km->next;
		for (wmKeyMapDiffItem *kmdi = km->diff_items.first; kmdi; kmdi = kmdi->next) {
			if (kmdi->add_item) {
				keymap_item_free(kmdi->add_item);
				MEM_freeN(kmdi->add_item);
			}
			if (kmdi->remove_item) {
				keymap_item_free(kmdi->remove_item);
				MEM_freeN(kmdi->remove_item);
			}
		}

		for (wmKeyMapItem *kmi = km->items.first; kmi; kmi = kmi->next) {
			keymap_item_free(kmi);
		}

		BLI_freelistN(&km->diff_items);
		BLI_freelistN(&km->items);

		MEM_freeN(km);
	}
	BLI_listbase_clear(&userdef->user_keymaps);
}

static void userdef_free_addons(UserDef *userdef)
{
	for (bAddon *addon = userdef->addons.first, *addon_next; addon; addon = addon_next) {
		addon_next = addon->next;
		if (addon->prop) {
			IDP_FreeProperty(addon->prop);
			MEM_freeN(addon->prop);
		}
		MEM_freeN(addon);
	}
	BLI_listbase_clear(&userdef->addons);
}

/**
 * When loading a new userdef from file,
 * or when exiting Blender.
 */
void BKE_blender_userdef_free_data(UserDef *userdef)
{
#define U _invalid_access_ /* ensure no accidental global access */
#ifdef U  /* quiet warning */
#endif

	userdef_free_keymaps(userdef);
	userdef_free_addons(userdef);

	for (uiFont *font = userdef->uifonts.first; font; font = font->next) {
		BLF_unload_id(font->blf_id);
	}

	BLF_default_set(-1);

	BLI_freelistN(&userdef->autoexec_paths);

	BLI_freelistN(&userdef->uistyles);
	BLI_freelistN(&userdef->uifonts);
	BLI_freelistN(&userdef->themes);

#undef U
}

/**
 * Handle changes in settings that need refreshing.
 */
void BKE_blender_userdef_refresh(void)
{
	/* prevent accidents */
	if (U.pixelsize == 0) U.pixelsize = 1;
	
	BLF_default_dpi(U.pixelsize * U.dpi);
	U.widget_unit = (U.pixelsize * U.dpi * 20 + 36) / 72;

}

/**
 * Write U from userdef.
 * This function defines which settings a template will override for the user preferences.
 */
void BKE_blender_userdef_set_app_template(UserDef *userdef)
{
	/* TODO:
	 * - keymaps
	 * - various minor settings (add as needed).
	 */

#define LIST_OVERRIDE(id) { \
	BLI_freelistN(&U.id); \
	BLI_movelisttolist(&U.id, &userdef->id); \
} ((void)0)

#define MEMCPY_OVERRIDE(id) \
	memcpy(U.id, userdef->id, sizeof(U.id));

	/* for some types we need custom free functions */
	userdef_free_addons(&U);
	userdef_free_keymaps(&U);

	LIST_OVERRIDE(uistyles);
	LIST_OVERRIDE(uifonts);
	LIST_OVERRIDE(themes);
	LIST_OVERRIDE(addons);
	LIST_OVERRIDE(user_keymaps);

	MEMCPY_OVERRIDE(light);

	MEMCPY_OVERRIDE(font_path_ui);
	MEMCPY_OVERRIDE(font_path_ui_mono);

#undef LIST_OVERRIDE
#undef MEMCPY_OVERRIDE
}

/* *****************  testing for break ************* */

static void (*blender_test_break_cb)(void) = NULL;

void BKE_blender_callback_test_break_set(void (*func)(void))
{
	blender_test_break_cb = func;
}


int BKE_blender_test_break(void)
{
	if (!G.background) {
		if (blender_test_break_cb)
			blender_test_break_cb();
	}
	
	return (G.is_break == true);
}


/** \name Blender's AtExit
 *
 * \note Don't use MEM_mallocN so functions can be registered at any time.
 * \{ */

static struct AtExitData {
	struct AtExitData *next;

	void (*func)(void *user_data);
	void *user_data;
} *g_atexit = NULL;

void BKE_blender_atexit_register(void (*func)(void *user_data), void *user_data)
{
	struct AtExitData *ae = malloc(sizeof(*ae));
	ae->next = g_atexit;
	ae->func = func;
	ae->user_data = user_data;
	g_atexit = ae;
}

void BKE_blender_atexit_unregister(void (*func)(void *user_data), const void *user_data)
{
	struct AtExitData *ae = g_atexit;
	struct AtExitData **ae_p = &g_atexit;

	while (ae) {
		if ((ae->func == func) && (ae->user_data == user_data)) {
			*ae_p = ae->next;
			free(ae);
			return;
		}
		ae_p = &ae;
		ae = ae->next;
	}
}

void BKE_blender_atexit(void)
{
	struct AtExitData *ae = g_atexit, *ae_next;
	while (ae) {
		ae_next = ae->next;

		ae->func(ae->user_data);

		free(ae);
		ae = ae_next;
	}
	g_atexit = NULL;
}

/** \} */