/*
 *  OpenVPN-PLAP-Provider
 *
 *  Copyright (C) 2017-2022 Selva Nair <selva.nair@gmail.com>
 *
 *  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 (see the file COPYING included with this
 *  distribution); if not, write to the Free Software Foundation, Inc.,
 *  59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#ifndef UI_LINK_H
#define UI_LINK_H

#ifdef __cplusplus
extern "C" {
#endif
#include <winsock2.h>  /* suppress warning about order of includes */
#include <commctrl.h>

typedef struct connection connection_t;
/* access to GUI states without exposing the options header */
extern int state_connected, state_disconnected, state_onhold;

/**
 * Initialize GUI data structures
 * @param hinstance of the calling process/dll context
 * @return 0 on success > 0 on error
 */
DWORD InitializeUI(HINSTANCE hinstance);

/**
 * Close threads, cleanup resources created by Initialize
 */
void DeleteUI(void);

/**
 * Enumerate PLAP enabled connection profiles.
 *
 * @param conn[] On output this contains an array of connection_t
 *               structs for PLAP enabled profiles
 * @param max_count size of conn[] array on input
 * @returns the number of connection profiles found.
 */
DWORD FindPLAPConnections(connection_t *conn[], size_t max_count);

/**
 * Display name of a connection profile.
 *
 * @param c connection_t struct for the profile (input)
 * @returns a constant wide char string
 */
const wchar_t *ConfigDisplayName(connection_t *c);

/**
 * State of a connection
 */
int ConnectionState(connection_t *c);

/**
 * Textual description of current connection state
 *
 * @param status On input must have space of at least len wide characters
 *               On output contains the NUL-terminated status text
 * @param len    Capacity of memory pointed to by status
 */
void GetConnectionStatusText(connection_t *c, WCHAR *status, DWORD len);

/**
 * Set hwnd as the parent window handle for dialogs
 */
void SetParentWindow(HWND hwnd);

void DetachAllOpenVPN();

/**
 * Enable/Disable display of status Window for connection c
 */
void ShowStatusWindow(connection_t *c, BOOL show);

/**
 * Start or Release OpenVPN connection for c
 * The connection is completed asynchronously.
 */
void ConnectHelper(connection_t *c);

/**
 * Stop OpenVPN connection for c
 * After initiating a disconnection, this polls for the connection status
 * and waits for the disconnection to complete for a max of 5 seconds.
 */
void DisconnectHelper(connection_t *c);

/**
 * Set c as the currently active profile selected for user interaction
 * UI dialogs are suppressed for non-active profiles
 */
void SetActiveProfile(connection_t *c);

/**
 * A helper function to run a dialog showing progress of a connection process.
 *
 * @param c Connection to monitor
 * @param cb_fn A callback function that is called back every 200 msec
 * @param cb_data Data passed to the callback function
 */
int RunProgressDialog(connection_t *c, PFTASKDIALOGCALLBACK cb_fn, LONG_PTR cb_data);

#ifdef __cplusplus
}
#endif

#endif /* UI_LINK_H */