/*
 * Samba Unix/Linux SMB client library
 * Registry Editor
 * Copyright (C) Christopher Davis 2012
 *
 * 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 3 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, see <http://www.gnu.org/licenses/>.
 */

#include "includes.h"
#include "regedit.h"
#include "regedit_dialog.h"
#include "regedit_valuelist.h"
#include "regedit_hexedit.h"
#include "util_reg.h"
#include "lib/registry/registry.h"
#include <stdarg.h>
#include <form.h>

static char *string_trim_n(TALLOC_CTX *ctx, const char *buf, size_t n)
{
	char *str;

	str = talloc_strndup(ctx, buf, n);

	if (str) {
		trim_string(str, " ", " ");
	}

	return str;
}

static char *string_trim(TALLOC_CTX *ctx, const char *buf)
{
	char *str;

	str = talloc_strdup(ctx, buf);

	if (str) {
		trim_string(str, " ", " ");
	}

	return str;
}

static int dialog_free(struct dialog *dia)
{
	if (dia->window) {
		delwin(dia->window);
	}
	if (dia->sub_window) {
		delwin(dia->sub_window);
	}
	if (dia->panel) {
		del_panel(dia->panel);
	}
	if (dia->choices) {
		unpost_menu(dia->choices);
		free_menu(dia->choices);
	}
	if (dia->choice_items) {
		ITEM **it;
		for (it = dia->choice_items; *it != NULL; ++it) {
			free_item(*it);
		}
	}

	return 0;
}

struct dialog *dialog_new(TALLOC_CTX *ctx, const char *title, int nlines,
			  int ncols, int y, int x)
{
	struct dialog *dia;

	dia = talloc_zero(ctx, struct dialog);
	if (dia == NULL) {
		return NULL;
	}

	talloc_set_destructor(dia, dialog_free);

	dia->window = newwin(nlines, ncols, y, x);
	if (dia->window == NULL) {
		goto fail;
	}

	box(dia->window, 0, 0);
	mvwaddstr(dia->window, 0, 1, title);

	/* body of the dialog within the box outline */
	dia->sub_window = derwin(dia->window, nlines - 2, ncols - 2, 1, 1);
	if (dia->sub_window == NULL) {
		goto fail;
	}

	dia->panel = new_panel(dia->window);
	if (dia->panel == NULL) {
		goto fail;
	}

	return dia;

fail:
	talloc_free(dia);

	return NULL;

}

static void center_dialog_above_window(int *nlines, int *ncols,
				       int *y, int *x)
{
	int centery, centerx;

	centery = LINES / 2;
	centerx = COLS / 2;
	*y = 0;
	*x = 0;

	if (*nlines > LINES) {
		*nlines = LINES;
	}
	if (*ncols > COLS) {
		*ncols = COLS;
	}

	if (*nlines/2 < centery) {
		*y = centery - *nlines / 2;
	}
	if (*ncols/2 < centerx) {
		*x = centerx - *ncols / 2;
	}
}

static int dialog_getch(struct dialog *dia)
{
	int c;

	c = regedit_getch();

	if (c == KEY_RESIZE) {
		int nlines, ncols, y, x;

		getmaxyx(dia->window, nlines, ncols);
		getbegyx(dia->window, y, x);
		if (dia->centered) {
			center_dialog_above_window(&nlines, &ncols, &y, &x);
		} else {
			if (nlines + y > LINES) {
				if (nlines > LINES) {
					y = 0;
				} else {
					y = LINES - nlines;
				}
			}
			if (ncols + x > COLS) {
				if (ncols > COLS) {
					x = 0;
				} else {
					x = COLS - ncols;
				}
			}
		}
		move_panel(dia->panel, y, x);
		doupdate();
	}

	return c;
}

struct dialog *dialog_center_new(TALLOC_CTX *ctx, const char *title,
				 int nlines, int ncols)
{
	struct dialog *dia;
	int y, x;

	center_dialog_above_window(&nlines, &ncols, &y, &x);

	dia = dialog_new(ctx, title, nlines, ncols, y, x);
	if (dia) {
		dia->centered = true;
	}

	return dia;
}

struct dialog *dialog_choice_new(TALLOC_CTX *ctx, const char *title,
				 const char **choices, int nlines,
				 int ncols, int y, int x)
{
	size_t nchoices, i;
	struct dialog *dia;

	dia = dialog_new(ctx, title, nlines, ncols, y, x);
	if (dia == NULL) {
		return NULL;
	}

	dia->menu_window = derwin(dia->sub_window, 1, ncols - 3,
				  nlines - 3, 0);
	if (dia->menu_window == NULL) {
		goto fail;
	}

	for (nchoices = 0; choices[nchoices] != NULL; ++nchoices)
		;
	dia->choice_items = talloc_zero_array(dia, ITEM *, nchoices + 1);
	if (dia->choice_items == NULL) {
		goto fail;
	}
	for (i = 0; i < nchoices; ++i) {
		char *desc = talloc_strdup(dia, choices[i]);
		if (desc == NULL) {
			goto fail;
		}
		dia->choice_items[i] = new_item(desc, desc);
		if (dia->choice_items[i] == NULL) {
			goto fail;
		}
		/* store choice index */
		set_item_userptr(dia->choice_items[i], (void*)(uintptr_t)i);
	}

	dia->choices = new_menu(dia->choice_items);
	if (dia->choices == NULL) {
		goto fail;
	}

	set_menu_format(dia->choices, 1, ncols);
	set_menu_win(dia->choices, dia->sub_window);
	set_menu_sub(dia->choices, dia->menu_window);
	menu_opts_off(dia->choices, O_SHOWDESC);
	set_menu_mark(dia->choices, "* ");
	post_menu(dia->choices);
	wmove(dia->sub_window, 0, 0);

	return dia;

fail:
	talloc_free(dia);

	return NULL;
}

struct dialog *dialog_choice_center_new(TALLOC_CTX *ctx, const char *title,
					const char **choices, int nlines,
					int ncols)
{
	int y, x;
	struct dialog *dia;
	center_dialog_above_window(&nlines, &ncols, &y, &x);

	dia = dialog_choice_new(ctx, title, choices, nlines, ncols, y, x);
	if (dia) {
		dia->centered = true;
	}

	return dia;
}

static bool current_item_is_first(MENU *menu)
{
	const ITEM *it = current_item(menu);

	return item_index(it) == 0;
}

static bool current_item_is_last(MENU *menu)
{
	const ITEM *it = current_item(menu);

	return item_index(it) == item_count(menu) - 1;
}

static int handle_menu_input(MENU *menu, int c)
{
	ITEM *item;

	switch (c) {
	case KEY_BTAB:
		if (current_item_is_first(menu)) {
			menu_driver(menu, REQ_LAST_ITEM);
		} else {
			menu_driver(menu, REQ_LEFT_ITEM);
		}
		break;
	case KEY_LEFT:
		menu_driver(menu, REQ_LEFT_ITEM);
		break;
	case '\t':
		if (current_item_is_last(menu)) {
			menu_driver(menu, REQ_FIRST_ITEM);
			break;
		} else {
			menu_driver(menu, REQ_RIGHT_ITEM);
		}
	case KEY_RIGHT:
		menu_driver(menu, REQ_RIGHT_ITEM);
		break;
	case KEY_ENTER:
	case '\n':
		item = current_item(menu);
		return (int)(uintptr_t)item_userptr(item);
	}

	return -1;
}

static void handle_form_input(FORM *frm, int c)
{
	switch (c) {
	case '\n':
		form_driver(frm, REQ_NEW_LINE);
		break;
	case KEY_UP:
		form_driver(frm, REQ_UP_CHAR);
		break;
	case KEY_DOWN:
		form_driver(frm, REQ_DOWN_CHAR);
		break;
	case '\b':
	case KEY_BACKSPACE:
		form_driver(frm, REQ_DEL_PREV);
		break;
	case KEY_LEFT:
		form_driver(frm, REQ_LEFT_CHAR);
		break;
	case KEY_RIGHT:
		form_driver(frm, REQ_RIGHT_CHAR);
		break;
	default:
		form_driver(frm, c);
		break;
	}
}

static int modal_loop(struct dialog *dia)
{
	int c;
	int selection = -1;

	update_panels();
	doupdate();

	while (selection == -1) {
		c = dialog_getch(dia);
		selection = handle_menu_input(dia->choices, c);
		update_panels();
		doupdate();
	}

	talloc_free(dia);

	return selection;
}

static struct dialog *dialog_msg_new(TALLOC_CTX *ctx, const char *title,
				     const char **choices, int nlines,
				     const char *msg, va_list ap)
{
	struct dialog *dia;
	char *str;
	int width;
#define MIN_WIDTH 20

	str = talloc_vasprintf(ctx, msg, ap);
	if (str == NULL) {
		return NULL;
	}

	width = strlen(str) + 2;
	if (width < MIN_WIDTH) {
		width = MIN_WIDTH;
	}
	dia = dialog_choice_center_new(ctx, title, choices, nlines, width);
	if (dia == NULL) {
		return NULL;
	}

	waddstr(dia->sub_window, str);
	talloc_free(str);

	return dia;
}

int dialog_input(TALLOC_CTX *ctx, char **output, const char *title,
		 const char *msg, ...)
{
	va_list ap;
	struct dialog *dia;
	const char *choices[] = {
		"Ok",
		"Cancel",
		NULL
	};
	FIELD *field[2] = {0};
	FORM *input;
	WINDOW *input_win;
	int y, x;
	int rv = -1;
	bool input_section = true;

	va_start(ap, msg);
	dia = dialog_msg_new(ctx, title, choices, 7, msg, ap);
	va_end(ap);
	if (dia == NULL) {
		return -1;
	}

	getmaxyx(dia->sub_window, y, x);
	input_win = derwin(dia->sub_window, 1, x - 2, 2, 1);
	if (input_win == NULL) {
		goto finish;
	}
	field[0] = new_field(1, x - 2, 0, 0, 0, 0);
	if (field[0] == NULL) {
		goto finish;
	}

	field_opts_off(field[0], O_BLANK | O_AUTOSKIP | O_STATIC);
	set_field_back(field[0], A_REVERSE);

	input = new_form(field);
	form_opts_off(input, O_NL_OVERLOAD | O_BS_OVERLOAD);
	set_form_win(input, dia->sub_window);
	set_form_sub(input, input_win);
	set_current_field(input, field[0]);
	post_form(input);
	*output = NULL;

	update_panels();
	doupdate();

	while (rv == -1) {
		int c = dialog_getch(dia);

		if (c == '\t' || c == KEY_BTAB) {
			if (input_section) {
				int valid = form_driver(input, REQ_VALIDATION);
				if (valid == E_OK) {
					input_section = false;
					if (c == '\t') {
						menu_driver(dia->choices,
							    REQ_FIRST_ITEM);
					} else {
						menu_driver(dia->choices,
							    REQ_LAST_ITEM);
					}
					pos_menu_cursor(dia->choices);
				}
			} else {
				if ((c == '\t' &&
				     current_item_is_last(dia->choices)) ||
				    (c == KEY_BTAB &&
				     current_item_is_first(dia->choices))) {
					input_section = true;
					set_current_field(input, field[0]);
					pos_form_cursor(input);
				} else {
					handle_menu_input(dia->choices, c);
				}
			}
		} else if (input_section) {
			handle_form_input(input, c);
		} else {
			rv = handle_menu_input(dia->choices, c);
			if (rv == DIALOG_OK) {
				const char *buf = field_buffer(field[0], 0);
				*output = string_trim(ctx, buf);
			}
		}
		update_panels();
		doupdate();
	}

finish:
	if (input) {
		unpost_form(input);
		free_form(input);
	}
	if (field[0]) {
		free_field(field[0]);
	}
	if (input_win) {
		delwin(input_win);
	}
	talloc_free(dia);

	return rv;
}

int dialog_notice(TALLOC_CTX *ctx, enum dialog_type type,
		  const char *title, const char *msg, ...)
{
	va_list ap;
	struct dialog *dia;
	const char *choices[] = {
		"Ok",
		"Cancel",
		NULL
	};

	if (type == DIA_ALERT) {
		choices[1] = NULL;
	}

	va_start(ap, msg);
	dia = dialog_msg_new(ctx, title, choices, 5, msg, ap);
	va_end(ap);
	if (dia == NULL) {
		return -1;
	}

	return modal_loop(dia);
}

#define EDIT_WIDTH		50
#define EDIT_INTERNAL_WIDTH	(EDIT_WIDTH - 2)
#define EDIT_INPUT_WIDTH	(EDIT_INTERNAL_WIDTH - 2)

#define EDIT_NAME_LABEL_Y	0
#define EDIT_NAME_LABEL_X	0
#define EDIT_NAME_LABEL_WIDTH	EDIT_INTERNAL_WIDTH
#define EDIT_NAME_LABEL_HEIGHT	1
#define EDIT_NAME_INPUT_Y	1
#define EDIT_NAME_INPUT_X	1
#define EDIT_NAME_INPUT_WIDTH	EDIT_INPUT_WIDTH
#define EDIT_NAME_INPUT_HEIGHT	1

#define EDIT_DATA_LABEL_Y	3
#define EDIT_DATA_LABEL_X	0
#define EDIT_DATA_LABEL_WIDTH	EDIT_INTERNAL_WIDTH
#define EDIT_DATA_LABEL_HEIGHT	1
#define EDIT_DATA_INPUT_Y	4
#define EDIT_DATA_INPUT_X	1
#define EDIT_DATA_INPUT_WIDTH	EDIT_INPUT_WIDTH
#define EDIT_DATA_HEIGHT_ONELINE	1
#define EDIT_DATA_HEIGHT_MULTILINE	5
#define EDIT_DATA_HEIGHT_BUF		10

#define EDIT_FORM_WIN_Y			0
#define EDIT_FORM_WIN_X			0
#define EDIT_FORM_WIN_HEIGHT_ONELINE	\
	(EDIT_NAME_LABEL_HEIGHT + EDIT_NAME_INPUT_HEIGHT + 1 + \
	 EDIT_DATA_LABEL_HEIGHT + EDIT_DATA_HEIGHT_ONELINE)

#define EDIT_FORM_WIN_HEIGHT_MULTILINE	\
	(EDIT_NAME_LABEL_HEIGHT + EDIT_NAME_INPUT_HEIGHT + 1 + \
	 EDIT_DATA_LABEL_HEIGHT + EDIT_DATA_HEIGHT_MULTILINE)

#define EDIT_FORM_WIN_HEIGHT_BUF	\
	(EDIT_NAME_LABEL_HEIGHT + EDIT_NAME_INPUT_HEIGHT + 1 + \
	 EDIT_DATA_LABEL_HEIGHT)

#define EDIT_FORM_WIN_WIDTH		EDIT_INTERNAL_WIDTH

#define EDIT_PAD		5
#define EDIT_HEIGHT_ONELINE	(EDIT_FORM_WIN_HEIGHT_ONELINE + EDIT_PAD)

#define EDIT_HEIGHT_MULTILINE	(EDIT_FORM_WIN_HEIGHT_MULTILINE + EDIT_PAD)

#define EDIT_HEIGHT_BUF		\
	(EDIT_FORM_WIN_HEIGHT_BUF + EDIT_DATA_HEIGHT_BUF + EDIT_PAD)

#define MAX_FIELDS 5
#define FLD_NAME 1
#define FLD_DATA 3

#define DIALOG_RESIZE 2

enum input_section {
	IN_NAME,
	IN_DATA,
	IN_MENU
};

struct edit_dialog {
	struct dialog *dia;
	WINDOW *input_win;
	FORM *input;
	FIELD *field[MAX_FIELDS];
	struct hexedit *buf;
	enum input_section section;
	bool closing;
	uint32_t mode;
};

static int edit_dialog_free(struct edit_dialog *edit)
{
	FIELD **f;

	if (edit->input) {
		unpost_form(edit->input);
		free_form(edit->input);
	}
	for (f = edit->field; *f; ++f) {
		free_field(*f);
	}
	delwin(edit->input_win);

	return 0;
}

static WERROR fill_value_buffer(struct edit_dialog *edit,
			        const struct value_item *vitem)
{
	char *tmp;

	switch (vitem->type) {
	case REG_DWORD: {
		uint32_t v = 0;
		if (vitem->data.length >= 4) {
			v = IVAL(vitem->data.data, 0);
		}
		tmp = talloc_asprintf(edit, "0x%x", v);
		if (tmp == NULL) {
			return WERR_NOMEM;
		}
		set_field_buffer(edit->field[FLD_DATA], 0, tmp);
		talloc_free(tmp);
		break;
	}
	case REG_SZ:
	case REG_EXPAND_SZ: {
		const char *s;

		if (!pull_reg_sz(edit, &vitem->data, &s)) {
			return WERR_NOMEM;
		}
		set_field_buffer(edit->field[FLD_DATA], 0, s);
		break;
	}
	case REG_MULTI_SZ: {
		const char **p, **a;
		char *buf = NULL;

		if (!pull_reg_multi_sz(edit, &vitem->data, &a)) {
			return WERR_NOMEM;
		}
		for (p = a; *p != NULL; ++p) {
			if (buf == NULL) {
				buf = talloc_asprintf(edit, "%s\n", *p);
			} else {
				buf = talloc_asprintf_append(buf, "%s\n", *p);
			}
			if (buf == NULL) {
				return WERR_NOMEM;
			}
		}
		set_field_buffer(edit->field[FLD_DATA], 0, buf);
		talloc_free(buf);
	}
	case REG_BINARY:
		/* initialized upon dialog creation */
		break;
	}

	return WERR_OK;
}

static bool value_exists(TALLOC_CTX *ctx, const struct registry_key *key,
			 const char *name)
{
	uint32_t type;
	DATA_BLOB blob;
	WERROR rv;

	rv = reg_key_get_value_by_name(ctx, key, name, &type, &blob);

	return W_ERROR_IS_OK(rv);
}

static WERROR set_value(struct edit_dialog *edit, struct registry_key *key,
			uint32_t type, bool new_value)
{
	WERROR rv;
	DATA_BLOB blob;
	char *name = string_trim(edit, field_buffer(edit->field[FLD_NAME], 0));

	if (!new_value && !edit->buf && !field_status(edit->field[FLD_DATA])) {
		return WERR_OK;
	}
	if (new_value && value_exists(edit, key, name)) {
		return WERR_FILE_EXISTS;
	}

	switch (edit->mode) {
	case REG_DWORD: {
		uint32_t val;
		int base = 10;
		const char *buf = field_buffer(edit->field[FLD_DATA], 0);

		if (buf[0] == '0' && tolower(buf[1]) == 'x') {
			base = 16;
		}

		val = strtoul(buf, NULL, base);
		blob = data_blob_talloc(edit, NULL, sizeof(val));
		SIVAL(blob.data, 0, val);
		rv = WERR_OK;
		break;
	}
	case REG_SZ:
	case REG_EXPAND_SZ: {
		const char *buf = field_buffer(edit->field[FLD_DATA], 0);
		char *str = string_trim(edit, buf);

		if (!str || !push_reg_sz(edit, &blob, str)) {
			rv = WERR_NOMEM;
		}
		break;
	}
	case REG_MULTI_SZ: {
		int rows, cols, max;
		const char **arr;
		size_t i;
		const char *buf = field_buffer(edit->field[FLD_DATA], 0);

		dynamic_field_info(edit->field[FLD_DATA], &rows, &cols, &max);

		arr = talloc_zero_array(edit, const char *, rows + 1);
		if (arr == NULL) {
			return WERR_NOMEM;
		}
		for (i = 0; *buf; ++i, buf += cols) {
			SMB_ASSERT(i < rows);
			arr[i] = string_trim_n(edit, buf, cols);
		}
		if (!push_reg_multi_sz(edit, &blob, arr)) {
			rv = WERR_NOMEM;
		}
		break;
	}
	case REG_BINARY:
		blob = data_blob_talloc(edit, NULL, edit->buf->len);
		memcpy(blob.data, edit->buf->data, edit->buf->len);
		break;
	}

	rv = reg_val_set(key, name, type, blob);

	return rv;
}

static void section_down(struct edit_dialog *edit)
{
	switch (edit->section) {
	case IN_NAME:
		if (form_driver(edit->input, REQ_VALIDATION) == E_OK) {
			edit->section = IN_DATA;
			if (edit->buf) {
				hexedit_set_cursor(edit->buf);
			} else {
				set_current_field(edit->input,
						  edit->field[FLD_DATA]);
				pos_form_cursor(edit->input);
			}
		}
		break;
	case IN_DATA:
		if (edit->buf ||
		    form_driver(edit->input, REQ_VALIDATION) == E_OK) {
			edit->section = IN_MENU;
			menu_driver(edit->dia->choices, REQ_FIRST_ITEM);
			pos_menu_cursor(edit->dia->choices);
		}
		break;
	case IN_MENU:
		if (current_item_is_last(edit->dia->choices)) {
			edit->section = IN_NAME;
			set_current_field(edit->input, edit->field[FLD_NAME]);
			pos_form_cursor(edit->input);
		} else {
			menu_driver(edit->dia->choices, REQ_RIGHT_ITEM);
		}
		break;
	}
}

static void section_up(struct edit_dialog *edit)
{
	switch (edit->section) {
	case IN_NAME:
		if (form_driver(edit->input, REQ_VALIDATION) == E_OK) {
			edit->section = IN_MENU;
			menu_driver(edit->dia->choices, REQ_LAST_ITEM);
			pos_menu_cursor(edit->dia->choices);
		}
		break;
	case IN_DATA:
		if (edit->buf ||
		    form_driver(edit->input, REQ_VALIDATION) == E_OK) {
			edit->section = IN_NAME;
			set_current_field(edit->input, edit->field[FLD_NAME]);
			pos_form_cursor(edit->input);
		}
		break;
	case IN_MENU:
		if (current_item_is_first(edit->dia->choices)) {
			edit->section = IN_DATA;
			if (edit->buf) {
				hexedit_set_cursor(edit->buf);
			} else {
				set_current_field(edit->input,
						  edit->field[FLD_DATA]);
				pos_form_cursor(edit->input);
			}
		} else {
			menu_driver(edit->dia->choices, REQ_LEFT_ITEM);
		}
		break;
	}
}

static void handle_hexedit_input(struct hexedit *buf, int c)
{
	switch (c) {
	case KEY_UP:
		hexedit_driver(buf, HE_CURSOR_UP);
		break;
	case KEY_DOWN:
		hexedit_driver(buf, HE_CURSOR_DOWN);
		break;
	case KEY_LEFT:
		hexedit_driver(buf, HE_CURSOR_LEFT);
		break;
	case KEY_RIGHT:
		hexedit_driver(buf, HE_CURSOR_RIGHT);
		break;
	default:
		hexedit_driver(buf, c);
		break;
	}

	hexedit_set_cursor(buf);
}

static WERROR edit_init_dialog(struct edit_dialog *edit, uint32_t type)
{
	char *title;
	int diaheight = -1;
	int winheight = -1;
	const char *choices[] = {
		"Ok",
		"Cancel",
		"Resize",
		NULL
	};

	switch (edit->mode) {
	case REG_MULTI_SZ:
		diaheight = EDIT_HEIGHT_MULTILINE;
		winheight = EDIT_FORM_WIN_HEIGHT_MULTILINE;
		choices[2] = NULL;
		break;
	case REG_BINARY:
		diaheight = EDIT_HEIGHT_BUF;
		winheight = EDIT_FORM_WIN_HEIGHT_BUF;
		break;
	default:
		diaheight = EDIT_HEIGHT_ONELINE;
		winheight = EDIT_FORM_WIN_HEIGHT_ONELINE;
		choices[2] = NULL;
		break;
	}

	title = talloc_asprintf(edit, "Edit %s value", str_regtype(type));
	if (title == NULL) {
		return WERR_NOMEM;
	}
	edit->dia = dialog_choice_center_new(edit, title, choices, diaheight,
					     EDIT_WIDTH);
	talloc_free(title);
	if (edit->dia == NULL) {
		return WERR_NOMEM;
	}
	edit->input_win = derwin(edit->dia->sub_window, winheight,
				 EDIT_FORM_WIN_WIDTH,
				 EDIT_FORM_WIN_Y, EDIT_FORM_WIN_X);
	if (edit->input_win == NULL) {
		return WERR_NOMEM;
	}

	return WERR_OK;
}

static WERROR edit_init_form(struct edit_dialog *edit,
			     const struct value_item *vitem)
{

	edit->field[0] = new_field(EDIT_NAME_LABEL_HEIGHT,
				   EDIT_NAME_LABEL_WIDTH,
				   EDIT_NAME_LABEL_Y,
				   EDIT_NAME_LABEL_X, 0, 0);
	if (edit->field[0] == NULL) {
		return WERR_NOMEM;
	}
	set_field_buffer(edit->field[0], 0, "Name");
	field_opts_off(edit->field[0], O_EDIT);

	edit->field[FLD_NAME] = new_field(EDIT_NAME_INPUT_HEIGHT,
					  EDIT_NAME_INPUT_WIDTH,
					  EDIT_NAME_INPUT_Y,
					  EDIT_NAME_INPUT_X, 0, 0);
	if (edit->field[FLD_NAME] == NULL) {
		return WERR_NOMEM;
	}

	edit->field[2] = new_field(EDIT_DATA_LABEL_HEIGHT,
				   EDIT_DATA_LABEL_WIDTH,
				   EDIT_DATA_LABEL_Y,
				   EDIT_DATA_LABEL_X, 0, 0);
	if (edit->field[2] == NULL) {
		return WERR_NOMEM;
	}
	set_field_buffer(edit->field[2], 0, "Data");
	field_opts_off(edit->field[2], O_EDIT);

	if (edit->mode == REG_BINARY) {
		size_t len = 8;
		const void *buf = NULL;

		if (vitem) {
			len = vitem->data.length;
			buf = vitem->data.data;
		}
		edit->buf = hexedit_new(edit, edit->dia->sub_window,
					EDIT_DATA_HEIGHT_BUF,
					EDIT_DATA_INPUT_Y,
					EDIT_DATA_INPUT_X,
					buf, len);
		if (edit->buf == NULL) {
			return WERR_NOMEM;
		}
		hexedit_refresh(edit->buf);
		hexedit_set_cursor(edit->buf);
	} else {
		int val_rows = EDIT_DATA_HEIGHT_ONELINE;

		if (edit->mode == REG_MULTI_SZ) {
			val_rows = EDIT_DATA_HEIGHT_MULTILINE;
		}
		edit->field[FLD_DATA] = new_field(val_rows,
						  EDIT_DATA_INPUT_WIDTH,
						  EDIT_DATA_INPUT_Y,
						  EDIT_DATA_INPUT_X, 0, 0);
		if (edit->field[FLD_DATA] == NULL) {
			return WERR_NOMEM;
		}
	}

	set_field_back(edit->field[FLD_NAME], A_REVERSE);
	field_opts_off(edit->field[FLD_NAME], O_BLANK | O_AUTOSKIP | O_STATIC);
	if (edit->field[FLD_DATA]) {
		set_field_back(edit->field[FLD_DATA], A_REVERSE);
		field_opts_off(edit->field[FLD_DATA],
			       O_BLANK | O_AUTOSKIP | O_STATIC | O_WRAP);
		if (edit->mode == REG_DWORD) {
			set_field_type(edit->field[FLD_DATA], TYPE_REGEXP,
				       "^ *([0-9]+|0[xX][0-9a-fA-F]+) *$");
		}
	}

	if (vitem) {
		set_field_buffer(edit->field[FLD_NAME], 0, vitem->value_name);
		field_opts_off(edit->field[FLD_NAME], O_EDIT);
		fill_value_buffer(edit, vitem);
	}

	edit->input = new_form(edit->field);
	if (edit->input == NULL) {
		return WERR_NOMEM;
	}
	form_opts_off(edit->input, O_NL_OVERLOAD | O_BS_OVERLOAD);

	set_form_win(edit->input, edit->dia->sub_window);
	set_form_sub(edit->input, edit->input_win);
	set_current_field(edit->input, edit->field[FLD_NAME]);
	post_form(edit->input);

	return WERR_OK;
}

static WERROR handle_editor_input(struct edit_dialog *edit,
				  struct registry_key *key,
				  uint32_t type,
				  const struct value_item *vitem, int c)
{
	WERROR rv = WERR_OK;
	int selection;

	if (edit->section == IN_NAME) {
		handle_form_input(edit->input, c);
	} else if (edit->section == IN_DATA) {
		if (edit->buf) {
			handle_hexedit_input(edit->buf, c);
		} else {
			handle_form_input(edit->input, c);
		}
	} else {
		selection = handle_menu_input(edit->dia->choices, c);
		if (selection == DIALOG_OK) {
			rv = set_value(edit, key, type, vitem == NULL);
			if (W_ERROR_EQUAL(rv, WERR_FILE_EXISTS)) {
				dialog_notice(edit, DIA_ALERT,
					      "Value exists",
					      "Value name already exists.");
				selection = -1;
			} else {
				edit->closing = true;
			}
		} else if (selection == DIALOG_RESIZE) {
			char *n;
			size_t newlen = 0;

			dialog_input(edit, &n, "Resize buffer",
				     "Enter new size");
			if (n) {
				newlen = strtoul(n, NULL, 10);
				edit->section = IN_DATA;
				hexedit_resize_buffer(edit->buf, newlen);
				hexedit_refresh(edit->buf);
				hexedit_set_cursor(edit->buf);
				talloc_free(n);
			}
		} else if (selection == DIALOG_CANCEL) {
			edit->closing = true;
		}
	}

	return rv;
}

WERROR dialog_edit_value(TALLOC_CTX *ctx, struct registry_key *key,
			 uint32_t type, const struct value_item *vitem,
			 bool force_binary)
{
	struct edit_dialog *edit;
	WERROR rv = WERR_NOMEM;

	edit = talloc_zero(ctx, struct edit_dialog);
	if (edit == NULL) {
		return rv;
	}
	talloc_set_destructor(edit, edit_dialog_free);

	edit->mode = type;
	if (force_binary || (vitem && vitem->unprintable)) {
		edit->mode = REG_BINARY;
	}

	rv = edit_init_dialog(edit, type);
	if (!W_ERROR_IS_OK(rv)) {
		goto finish;
	}
	rv = edit_init_form(edit, vitem);
	if (!W_ERROR_IS_OK(rv)) {
		goto finish;
	}

	update_panels();
	doupdate();

	edit->section = IN_NAME;
	edit->closing = false;

	do {
		int c = dialog_getch(edit->dia);

		if (c == '\t') {
			section_down(edit);
		} else if (c == KEY_BTAB) {
			section_up(edit);
		} else {
			rv = handle_editor_input(edit, key, type, vitem, c);
		}

		update_panels();
		doupdate();
	} while (!edit->closing);

finish:
	talloc_free(edit);

	return rv;
}

int dialog_select_type(TALLOC_CTX *ctx, int *type)
{
	struct dialog *dia;
	const char *choices[] = {
		"OK",
		"Cancel",
		NULL
	};
	const char *reg_types[] = {
		"REG_DWORD",
		"REG_SZ",
		"REG_EXPAND_SZ",
		"REG_MULTI_SZ",
		"REG_BINARY",
	};
#define NTYPES (sizeof(reg_types) / sizeof(const char*))
	ITEM **item;
	MENU *list;
	WINDOW *type_win;
	int sel = -1;
	size_t i;

	dia = dialog_choice_center_new(ctx, "New Value", choices, 10, 20);
	if (dia == NULL) {
		return -1;
	}

	mvwprintw(dia->sub_window, 0, 0, "Choose type:");
	type_win = derwin(dia->sub_window, 6, 18, 1, 0);
	if (type_win == NULL) {
		goto finish;
	}

	item = talloc_zero_array(dia, ITEM *, NTYPES + 1);
	if (item == NULL) {
		goto finish;
	}

	for (i = 0; i < NTYPES; ++i) {
		int t = regtype_by_string(reg_types[i]);

		item[i] = new_item(reg_types[i], reg_types[i]);
		if (item[i] == NULL) {
			goto finish;
		}
		set_item_userptr(item[i], (void*)(uintptr_t)t);
	}

	list = new_menu(item);
	if (list == NULL) {
		goto finish;
	}

	set_menu_format(list, 7, 1);
	set_menu_win(list, dia->sub_window);
	set_menu_sub(list, type_win);
	menu_opts_off(list, O_SHOWDESC);
	set_menu_mark(list, "* ");
	post_menu(list);

	update_panels();
	doupdate();

	while (sel == -1) {
		ITEM *it;
		int c = dialog_getch(dia);

		switch (c) {
		case KEY_UP:
			menu_driver(list, REQ_UP_ITEM);
			break;
		case KEY_DOWN:
			menu_driver(list, REQ_DOWN_ITEM);
			break;
		case KEY_LEFT:
			menu_driver(dia->choices, REQ_LEFT_ITEM);
			break;
		case KEY_RIGHT:
			menu_driver(dia->choices, REQ_RIGHT_ITEM);
			break;
		case '\n':
		case KEY_ENTER:
			it = current_item(list);
			*type = (int)(uintptr_t)item_userptr(it);
			it = current_item(dia->choices);
			sel = (int)(uintptr_t)item_userptr(it);
			break;
		}

		update_panels();
		doupdate();
	}

finish:
	if (list) {
		unpost_menu(list);
		free_menu(list);
	}
	if (item) {
		ITEM **it;
		for (it = item; *it; ++it) {
			free_item(*it);
		}
	}
	if (type_win) {
		delwin(type_win);
	}
	talloc_free(dia);

	return sel;
}