/*
 * 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) 2008 Blender Foundation.
 * All rights reserved.
 */

/** \file
 * \ingroup spuserpref
 */

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

#include "MEM_guardedalloc.h"

#include "BLI_blenlib.h"
#include "BLI_utildefines.h"

#include "BKE_context.h"
#include "BKE_screen.h"

#include "ED_screen.h"
#include "ED_space_api.h"

#include "RNA_access.h"
#include "RNA_enum_types.h"

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

#include "UI_interface.h"

/* ******************** default callbacks for userpref space ***************** */

static SpaceLink *userpref_new(const ScrArea *area, const Scene *UNUSED(scene))
{
  ARegion *region;
  SpaceUserPref *spref;

  spref = MEM_callocN(sizeof(SpaceUserPref), "inituserpref");
  spref->spacetype = SPACE_USERPREF;

  /* header */
  region = MEM_callocN(sizeof(ARegion), "header for userpref");

  BLI_addtail(&spref->regionbase, region);
  region->regiontype = RGN_TYPE_HEADER;
  /* Ignore user preference "USER_HEADER_BOTTOM" here (always show bottom for new types). */
  region->alignment = RGN_ALIGN_BOTTOM;

  /* navigation region */
  region = MEM_callocN(sizeof(ARegion), "navigation region for userpref");

  BLI_addtail(&spref->regionbase, region);
  region->regiontype = RGN_TYPE_NAV_BAR;
  region->alignment = RGN_ALIGN_LEFT;

  /* Use smaller size when opened in area like properties editor. */
  if (area->winx && area->winx < 3.0f * UI_NAVIGATION_REGION_WIDTH * UI_DPI_FAC) {
    region->sizex = UI_NARROW_NAVIGATION_REGION_WIDTH;
  }

  /* execution region */
  region = MEM_callocN(sizeof(ARegion), "execution region for userpref");

  BLI_addtail(&spref->regionbase, region);
  region->regiontype = RGN_TYPE_EXECUTE;
  region->alignment = RGN_ALIGN_BOTTOM | RGN_SPLIT_PREV;
  region->flag |= RGN_FLAG_DYNAMIC_SIZE;

  /* main region */
  region = MEM_callocN(sizeof(ARegion), "main region for userpref");

  BLI_addtail(&spref->regionbase, region);
  region->regiontype = RGN_TYPE_WINDOW;

  return (SpaceLink *)spref;
}

/* not spacelink itself */
static void userpref_free(SpaceLink *UNUSED(sl))
{
  //  SpaceUserPref *spref = (SpaceUserPref *)sl;
}

/* spacetype; init callback */
static void userpref_init(struct wmWindowManager *UNUSED(wm), ScrArea *UNUSED(area))
{
}

static SpaceLink *userpref_duplicate(SpaceLink *sl)
{
  SpaceUserPref *sprefn = MEM_dupallocN(sl);

  /* clear or remove stuff from old */

  return (SpaceLink *)sprefn;
}

/* add handlers, stuff you only do once or on area/region changes */
static void userpref_main_region_init(wmWindowManager *wm, ARegion *region)
{
  /* do not use here, the properties changed in userprefs do a system-wide refresh,
   * then scroller jumps back */
  /*  region->v2d.flag &= ~V2D_IS_INITIALISED; */

  region->v2d.scroll = V2D_SCROLL_RIGHT | V2D_SCROLL_VERTICAL_HIDE;

  ED_region_panels_init(wm, region);
}

static void userpref_main_region_layout(const bContext *C, ARegion *region)
{
  char id_lower[64];
  const char *contexts[2] = {id_lower, NULL};

  /* Avoid duplicating identifiers, use existing RNA enum. */
  {
    const EnumPropertyItem *items = rna_enum_preference_section_items;
    int i = RNA_enum_from_value(items, U.space_data.section_active);
    /* File is from the future. */
    if (i == -1) {
      i = 0;
    }
    const char *id = items[i].identifier;
    BLI_assert(strlen(id) < sizeof(id_lower));
    STRNCPY(id_lower, id);
    BLI_str_tolower_ascii(id_lower, strlen(id_lower));
  }

  ED_region_panels_layout_ex(
      C, region, &region->type->paneltypes, contexts, U.space_data.section_active, true, NULL);
}

static void userpref_operatortypes(void)
{
}

static void userpref_keymap(struct wmKeyConfig *UNUSED(keyconf))
{
}

/* add handlers, stuff you only do once or on area/region changes */
static void userpref_header_region_init(wmWindowManager *UNUSED(wm), ARegion *region)
{
  ED_region_header_init(region);
}

static void userpref_header_region_draw(const bContext *C, ARegion *region)
{
  ED_region_header(C, region);
}

/* add handlers, stuff you only do once or on area/region changes */
static void userpref_navigation_region_init(wmWindowManager *wm, ARegion *region)
{
  region->v2d.scroll = V2D_SCROLL_RIGHT | V2D_SCROLL_VERTICAL_HIDE;

  ED_region_panels_init(wm, region);
}

static void userpref_navigation_region_draw(const bContext *C, ARegion *region)
{
  ED_region_panels(C, region);
}

/* add handlers, stuff you only do once or on area/region changes */
static void userpref_execute_region_init(wmWindowManager *wm, ARegion *region)
{
  ED_region_panels_init(wm, region);
  region->v2d.keepzoom |= V2D_LOCKZOOM_X | V2D_LOCKZOOM_Y;
}

static void userpref_main_region_listener(wmWindow *UNUSED(win),
                                          ScrArea *UNUSED(area),
                                          ARegion *UNUSED(region),
                                          wmNotifier *UNUSED(wmn),
                                          const Scene *UNUSED(scene))
{
  /* context changes */
}

static void userpref_header_listener(wmWindow *UNUSED(win),
                                     ScrArea *UNUSED(area),
                                     ARegion *UNUSED(region),
                                     wmNotifier *UNUSED(wmn),
                                     const Scene *UNUSED(scene))
{
  /* context changes */
#if 0
  switch (wmn->category) {
    default:
      break;
  }
#endif
}

static void userpref_navigation_region_listener(wmWindow *UNUSED(win),
                                                ScrArea *UNUSED(area),
                                                ARegion *UNUSED(region),
                                                wmNotifier *UNUSED(wmn),
                                                const Scene *UNUSED(scene))
{
  /* context changes */
}

static void userpref_execute_region_listener(wmWindow *UNUSED(win),
                                             ScrArea *UNUSED(area),
                                             ARegion *UNUSED(region),
                                             wmNotifier *UNUSED(wmn),
                                             const Scene *UNUSED(scene))
{
  /* context changes */
}

/* only called once, from space/spacetypes.c */
void ED_spacetype_userpref(void)
{
  SpaceType *st = MEM_callocN(sizeof(SpaceType), "spacetype userpref");
  ARegionType *art;

  st->spaceid = SPACE_USERPREF;
  strncpy(st->name, "Userpref", BKE_ST_MAXNAME);

  st->new = userpref_new;
  st->free = userpref_free;
  st->init = userpref_init;
  st->duplicate = userpref_duplicate;
  st->operatortypes = userpref_operatortypes;
  st->keymap = userpref_keymap;

  /* regions: main window */
  art = MEM_callocN(sizeof(ARegionType), "spacetype userpref region");
  art->regionid = RGN_TYPE_WINDOW;
  art->init = userpref_main_region_init;
  art->layout = userpref_main_region_layout;
  art->draw = ED_region_panels_draw;
  art->listener = userpref_main_region_listener;
  art->keymapflag = ED_KEYMAP_UI;

  BLI_addhead(&st->regiontypes, art);

  /* regions: header */
  art = MEM_callocN(sizeof(ARegionType), "spacetype userpref region");
  art->regionid = RGN_TYPE_HEADER;
  art->prefsizey = HEADERY;
  art->keymapflag = ED_KEYMAP_UI | ED_KEYMAP_VIEW2D | ED_KEYMAP_HEADER;
  art->listener = userpref_header_listener;
  art->init = userpref_header_region_init;
  art->draw = userpref_header_region_draw;

  BLI_addhead(&st->regiontypes, art);

  /* regions: navigation window */
  art = MEM_callocN(sizeof(ARegionType), "spacetype userpref region");
  art->regionid = RGN_TYPE_NAV_BAR;
  art->prefsizex = UI_NAVIGATION_REGION_WIDTH;
  art->init = userpref_navigation_region_init;
  art->draw = userpref_navigation_region_draw;
  art->listener = userpref_navigation_region_listener;
  art->keymapflag = ED_KEYMAP_UI | ED_KEYMAP_NAVBAR;

  BLI_addhead(&st->regiontypes, art);

  /* regions: execution window */
  art = MEM_callocN(sizeof(ARegionType), "spacetype userpref region");
  art->regionid = RGN_TYPE_EXECUTE;
  art->init = userpref_execute_region_init;
  art->layout = ED_region_panels_layout;
  art->draw = ED_region_panels_draw;
  art->listener = userpref_execute_region_listener;
  art->keymapflag = ED_KEYMAP_UI;

  BLI_addhead(&st->regiontypes, art);

  BKE_spacetype_register(st);
}
