/*
 * Copyright 2016 Vincent Sanders <vince@netsurf-browser.org>
 *
 * This file is part of NetSurf, http://www.netsurf-browser.org/
 *
 * NetSurf 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; version 2 of the License.
 *
 * NetSurf 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/>.
 */

/**
 * \file
 * Implementation of win32 cookie manager.
 */

#include <stdint.h>
#include <stdlib.h>
#include <windows.h>

#include "utils/log.h"
#include "utils/nsoption.h"
#include "netsurf/keypress.h"
#include "netsurf/plotters.h"
#include "desktop/cookie_manager.h"

#include "windows/plot.h"
#include "windows/corewindow.h"
#include "windows/cookies.h"


struct nsw32_cookie_window {
	struct nsw32_corewindow core;
};

static struct nsw32_cookie_window *cookie_window = NULL;

/**
 * callback for keypress on cookie window
 *
 * \param nsw32_cw The nsw32 core window structure.
 * \param nskey The netsurf key code
 * \return NSERROR_OK on success otherwise apropriate error code
 */
static nserror
nsw32_cookie_key(struct nsw32_corewindow *nsw32_cw, uint32_t nskey)
{
	if (cookie_manager_keypress(nskey)) {
		return NSERROR_OK;
	}
	return NSERROR_NOT_IMPLEMENTED;
}


/**
 * callback for mouse action on cookie window
 *
 * \param nsw32_cw The nsw32 core window structure.
 * \param mouse_state netsurf mouse state on event
 * \param x location of event
 * \param y location of event
 * \return NSERROR_OK on success otherwise apropriate error code
 */
static nserror
nsw32_cookie_mouse(struct nsw32_corewindow *nsw32_cw,
		   browser_mouse_state mouse_state,
		   int x, int y)
{
	cookie_manager_mouse_action(mouse_state, x, y);

	return NSERROR_OK;
}


/**
 * callback on draw event for cookie window
 *
 * \param nsw32_cw The nsw32 core window structure.
 * \param scrollx The horizontal scroll offset.
 * \param scrolly The vertical scroll offset.
 * \param r The rectangle of the window that needs updating.
 * \return NSERROR_OK on success otherwise apropriate error code
 */
static nserror
nsw32_cookie_draw(struct nsw32_corewindow *nsw32_cw,
		  int scrollx,
		  int scrolly,
		  struct rect *r)
{
	struct redraw_context ctx = {
		.interactive = true,
		.background_images = true,
		.plot = &win_plotters
	};

	cookie_manager_redraw(-scrollx, -scrolly, r, &ctx);

	return NSERROR_OK;
}


/**
 * callback on close event for cookie window
 *
 * \param nsw32_cw The nsw32 core window structure.
 * \return NSERROR_OK on success otherwise apropriate error code
 */
static nserror
nsw32_cookie_close(struct nsw32_corewindow *nsw32_cw)
{
	ShowWindow(nsw32_cw->hWnd, SW_HIDE);

	return NSERROR_OK;
}


/**
 * Creates the window for the cookie tree.
 *
 * \param hInstance The application instance
 * \return NSERROR_OK on success else appropriate error code on faliure.
 */
static nserror nsw32_cookie_init(HINSTANCE hInstance)
{
	struct nsw32_cookie_window *ncwin;
	nserror res;

	if (cookie_window != NULL) {
		return NSERROR_OK;
	}

	ncwin = calloc(1, sizeof(*ncwin));
	if (ncwin == NULL) {
		return NSERROR_NOMEM;
	}

	ncwin->core.title = "NetSurf Cookies";
	ncwin->core.draw = nsw32_cookie_draw;
	ncwin->core.key = nsw32_cookie_key;
	ncwin->core.mouse = nsw32_cookie_mouse;
	ncwin->core.close = nsw32_cookie_close;

	res = nsw32_corewindow_init(hInstance, NULL, &ncwin->core);
	if (res != NSERROR_OK) {
		free(ncwin);
		return res;
	}

	res = cookie_manager_init(ncwin->core.cb_table,
				  (struct core_window *)ncwin);
	if (res != NSERROR_OK) {
		free(ncwin);
		return res;
	}

	/* memoise window so it can be represented when necessary
	 * instead of recreating every time.
	 */
	cookie_window = ncwin;

	return NSERROR_OK;
}


/* exported interface documented in windows/cookie.h */
nserror nsw32_cookies_present(HINSTANCE hInstance)
{
	nserror res;

	res = nsw32_cookie_init(hInstance);
	if (res == NSERROR_OK) {
		ShowWindow(cookie_window->core.hWnd, SW_SHOWNORMAL);
	}
	return res;
}


/* exported interface documented in windows/cookie.h */
nserror nsw32_cookies_finalise(void)
{
	nserror res;

	if (cookie_window == NULL) {
		return NSERROR_OK;
	}

	res = cookie_manager_fini();
	if (res == NSERROR_OK) {
		res = nsw32_corewindow_fini(&cookie_window->core);
		DestroyWindow(cookie_window->core.hWnd);
		free(cookie_window);
		cookie_window = NULL;
	}

	return res;
}