/**
 * $Id:
 *
 * ***** 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 * The Original Code is Copyright (C) 2008 Blender Foundation.
 * All rights reserved.
 *
 * 
 * Contributor(s): Blender Foundation
 *
 * ***** END GPL LICENSE BLOCK *****
 */

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

#include "DNA_object_types.h"
#include "DNA_space_types.h"
#include "DNA_scene_types.h"
#include "DNA_screen_types.h"

#include "MEM_guardedalloc.h"

#include "BLO_readfile.h"

#include "BLI_blenlib.h"
#include "BLI_arithb.h"
#include "BLI_rand.h"

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

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

#include "BIF_gl.h"

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

#include "UI_interface.h"
#include "UI_resources.h"
#include "UI_view2d.h"

#include "ED_markers.h"
#include "ED_fileselect.h"

#include "file_intern.h"	// own include
#include "fsmenu.h"
#include "filelist.h"

/* ******************** default callbacks for file space ***************** */

static SpaceLink *file_new(const bContext *C)
{
	ARegion *ar;
	SpaceFile *sfile;
	
	sfile= MEM_callocN(sizeof(SpaceFile), "initfile");
	sfile->spacetype= SPACE_FILE;	
	sfile->params= MEM_callocN(sizeof(FileSelectParams), "fileselparams");
	sfile->params->files = filelist_new();

	// ED_fileselect_set_params(C, FILE_UNIX, "Load File", "F:\\photos\\2008_Kos", NULL, NULL, 0, 0, 0);

	/* XXX move to context
	sfile->dir[0]= '/';
	strcpy(sfile->dir, "F:\\photos\\2008_Kos");
	sfile->type= FILE_UNIX;
	strcpy(sfile->title, "Load");
	sfile->prv_h = 96;
	sfile->prv_w = 96;
	sfile->files = NULL;
	*/

	/* header */
	ar= MEM_callocN(sizeof(ARegion), "header for file");
	BLI_addtail(&sfile->regionbase, ar);
	ar->regiontype= RGN_TYPE_HEADER;
	ar->alignment= RGN_ALIGN_BOTTOM;

	/* channel list region */
	ar= MEM_callocN(sizeof(ARegion), "channel area for file");
	BLI_addtail(&sfile->regionbase, ar);
	ar->regiontype= RGN_TYPE_CHANNELS;
	ar->alignment= RGN_ALIGN_LEFT;

	/* ui list region */
	ar= MEM_callocN(sizeof(ARegion), "ui area for file");
	BLI_addtail(&sfile->regionbase, ar);
	ar->regiontype= RGN_TYPE_UI;
	ar->alignment= RGN_ALIGN_TOP;

	/* main area */
	ar= MEM_callocN(sizeof(ARegion), "main area for file");
	BLI_addtail(&sfile->regionbase, ar);
	ar->regiontype= RGN_TYPE_WINDOW;
	ar->v2d.scroll = (V2D_SCROLL_RIGHT | V2D_SCROLL_BOTTOM);
	ar->v2d.align = (V2D_ALIGN_NO_NEG_X|V2D_ALIGN_NO_POS_Y);
	ar->v2d.keepzoom = (V2D_LOCKZOOM_X|V2D_LOCKZOOM_Y|V2D_KEEPZOOM|V2D_KEEPASPECT);
	ar->v2d.keeptot= V2D_KEEPTOT_STRICT;
	ar->v2d.minzoom= ar->v2d.maxzoom= 1.0f;

	return (SpaceLink *)sfile;
}

/* not spacelink itself */
static void file_free(SpaceLink *sl)
{	
	SpaceFile *sfile= (SpaceFile *) sl;
	
	if (sfile->params) {
		if(sfile->params->files) {
			filelist_free(sfile->params->files);
			filelist_freelib(sfile->params->files);
			MEM_freeN(sfile->params->files);
			sfile->params->files = 0;
		}
		if(sfile->params->pupmenu)
			MEM_freeN(sfile->params->pupmenu);
		MEM_freeN(sfile->params);
		sfile->params = 0;
	}
	
}


/* spacetype; init callback */
static void file_init(struct wmWindowManager *wm, ScrArea *sa)
{	
}

static SpaceLink *file_duplicate(SpaceLink *sl)
{
	SpaceFile *sfilen= MEM_dupallocN(sl);
	
	/* clear or remove stuff from old */
	
	return (SpaceLink *)sfilen;
}



/* add handlers, stuff you only do once or on area/region changes */
static void file_main_area_init(wmWindowManager *wm, ARegion *ar)
{
	ListBase *keymap;
	
	UI_view2d_region_reinit(&ar->v2d, V2D_COMMONVIEW_LIST, ar->winx, ar->winy);
	
	/* own keymap */
	keymap= WM_keymap_listbase(wm, "File", SPACE_FILE, 0);	/* XXX weak? */
	WM_event_add_keymap_handler_bb(&ar->handlers, keymap, &ar->v2d.mask, &ar->winrct);
}

static void file_main_area_draw(const bContext *C, ARegion *ar)
{
	/* draw entirely, view changes should be handled here */
	SpaceFile *sfile= (SpaceFile*)CTX_wm_space_data(C);
	FileSelectParams* params = ED_fileselect_get_params(C);
	View2D *v2d= &ar->v2d;
	View2DScrollers *scrollers;
	float col[3];
	
	if (!params->files) {
		params->files = filelist_new();
		filelist_setdir(params->files, params->dir);
		filelist_settype(params->files, params->type);
	}

	if (filelist_empty(params->files))
	{
		unsigned int filter = 0;
		filelist_hidedot(params->files, params->flag & FILE_HIDE_DOT);
		if (params->flag & FILE_FILTER) {
			filter = params->filter ;
		} else {
			filter = 0;
		}

		filelist_setfilter(params->files, filter);
		filelist_readdir(params->files);
		
		if(params->sort!=FILE_SORTALPHA) filelist_sort(params->files, params->sort);		
	}


	/* clear and setup matrix */
	UI_GetThemeColor3fv(TH_BACK, col);
	glClearColor(col[0], col[1], col[2], 0.0);
	glClear(GL_COLOR_BUFFER_BIT);
	
	file_calc_previews(C,ar);


	/* data... */
	UI_view2d_view_ortho(C, v2d);
	
	if (params->display) {
		file_draw_previews(C, ar);
	} else {
		file_draw_list(C, ar);
	}
	
	
	/* reset view matrix */
	UI_view2d_view_restore(C);
	
	/* scrollers */
	scrollers= UI_view2d_scrollers_calc(C, v2d, V2D_ARG_DUMMY, V2D_ARG_DUMMY, V2D_ARG_DUMMY, V2D_ARG_DUMMY);
	UI_view2d_scrollers_draw(C, v2d, scrollers);
	UI_view2d_scrollers_free(scrollers);

}

void file_operatortypes(void)
{
	WM_operatortype_append(ED_FILE_OT_select);
	WM_operatortype_append(ED_FILE_OT_select_bookmark);
}

void file_keymap(struct wmWindowManager *wm)
{
	ListBase *keymap= WM_keymap_listbase(wm, "File", SPACE_FILE, 0);
	WM_keymap_add_item(keymap, "ED_FILE_OT_select", SELECTMOUSE, KM_PRESS, 0, 0);

	keymap= WM_keymap_listbase(wm, "FileBookmark", SPACE_FILE, 0);
	WM_keymap_add_item(keymap, "ED_FILE_OT_select_bookmark", SELECTMOUSE, KM_PRESS, 0, 0);
}


static void file_channel_area_init(wmWindowManager *wm, ARegion *ar)
{
	ListBase *keymap;

	UI_view2d_region_reinit(&ar->v2d, V2D_COMMONVIEW_LIST, ar->winx, ar->winy);

	/* own keymap */
	keymap= WM_keymap_listbase(wm, "FileBookmark", SPACE_FILE, 0);
	WM_event_add_keymap_handler_bb(&ar->handlers, keymap, NULL, NULL);
}

static void file_channel_area_draw(const bContext *C, ARegion *ar)
{
	View2D *v2d= &ar->v2d;
	float col[3];

	UI_GetThemeColor3fv(TH_BACK, col);
	glClearColor(col[0], col[1], col[2], 0.0);
	glClear(GL_COLOR_BUFFER_BIT);

	/* data... */
	UI_view2d_view_ortho(C, v2d);

	file_draw_fsmenu(C, ar);
}

/* add handlers, stuff you only do once or on area/region changes */
static void file_header_area_init(wmWindowManager *wm, ARegion *ar)
{
	UI_view2d_region_reinit(&ar->v2d, V2D_COMMONVIEW_HEADER, ar->winx, ar->winy);
}

static void file_header_area_draw(const bContext *C, ARegion *ar)
{
	float col[3];
	
	/* clear */
	if(ED_screen_area_active(C))
		UI_GetThemeColor3fv(TH_HEADER, col);
	else
		UI_GetThemeColor3fv(TH_HEADERDESEL, col);
	
	glClearColor(col[0], col[1], col[2], 0.0);
	glClear(GL_COLOR_BUFFER_BIT);
	
	/* set view2d view matrix for scrolling (without scrollers) */
	UI_view2d_view_ortho(C, &ar->v2d);
	
	file_header_buttons(C, ar);
	
	/* restore view matrix? */
	UI_view2d_view_restore(C);
}

/* add handlers, stuff you only do once or on area/region changes */
static void file_ui_area_init(wmWindowManager *wm, ARegion *ar)
{
	UI_view2d_region_reinit(&ar->v2d, V2D_COMMONVIEW_HEADER, ar->winx, ar->winy);
}

static void file_ui_area_draw(const bContext *C, ARegion *ar)
{
	float col[3];
	/* clear */
	UI_GetThemeColor3fv(TH_BACK, col);
	glClearColor(col[0], col[1], col[2], 0.0);
	glClear(GL_COLOR_BUFFER_BIT);

	/* set view2d view matrix for scrolling (without scrollers) */
	UI_view2d_view_ortho(C, &ar->v2d);

	file_draw_buttons(C, ar);

	UI_view2d_view_restore(C);
}

static void file_main_area_listener(ARegion *ar, wmNotifier *wmn)
{
	/* context changes */
}

/* only called once, from space/spacetypes.c */
void ED_spacetype_file(void)
{
	SpaceType *st= MEM_callocN(sizeof(SpaceType), "spacetype file");
	ARegionType *art;
	
	st->spaceid= SPACE_FILE;
	
	st->new= file_new;
	st->free= file_free;
	st->init= file_init;
	st->duplicate= file_duplicate;
	st->operatortypes= file_operatortypes;
	st->keymap= file_keymap;
	
	/* regions: main window */
	art= MEM_callocN(sizeof(ARegionType), "spacetype file region");
	art->regionid = RGN_TYPE_WINDOW;
	art->init= file_main_area_init;
	art->draw= file_main_area_draw;
	// art->listener= file_main_area_listener;
	art->keymapflag= ED_KEYMAP_UI|ED_KEYMAP_VIEW2D;
	BLI_addhead(&st->regiontypes, art);
	
	/* regions: header */
	art= MEM_callocN(sizeof(ARegionType), "spacetype file region");
	art->regionid = RGN_TYPE_HEADER;
	art->minsizey= HEADERY;
	art->keymapflag= ED_KEYMAP_UI|ED_KEYMAP_VIEW2D;
	art->init= file_header_area_init;
	art->draw= file_header_area_draw;
	BLI_addhead(&st->regiontypes, art);
	
	/* regions: ui */
	art= MEM_callocN(sizeof(ARegionType), "spacetype file region");
	art->regionid = RGN_TYPE_UI;
	art->minsizey= 100;
	art->keymapflag= ED_KEYMAP_UI;
	art->init= file_ui_area_init;
	art->draw= file_ui_area_draw;
	BLI_addhead(&st->regiontypes, art);

	/* regions: channels (directories) */
	art= MEM_callocN(sizeof(ARegionType), "spacetype file region");
	art->regionid = RGN_TYPE_CHANNELS;
	art->minsizex= 200;
	art->keymapflag= ED_KEYMAP_UI|ED_KEYMAP_VIEW2D;
	art->init= file_channel_area_init;
	art->draw= file_channel_area_draw;
	BLI_addhead(&st->regiontypes, art);
	
	BKE_spacetype_register(st);

}

void ED_file_init(void)
{
	char name[FILE_MAX];
	BLI_make_file_string("/", name, BLI_gethome(), ".Bfs");
	fsmenu_read_file(name);
	filelist_init_icons();
}

void ED_file_exit(void)
{
	fsmenu_free();
	filelist_free_icons();
}