/*
 * Copyright 2005 James Bursa <bursa@users.sourceforge.net>
 *
 * 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/>.
 */

#define _GNU_SOURCE  /* for strndup */
#include <assert.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <limits.h>
#include <sys/select.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <curl/curl.h>
#include <gdk/gdkkeysyms.h>
#include <gtk/gtk.h>
#include <glade/glade.h>
#include "content/content.h"
#include "content/fetch.h"
#include "content/fetchers/fetch_curl.h"
#include "content/urldb.h"
#include "desktop/401login.h"
#include "desktop/browser.h"
#include "desktop/cookies.h"
#include "desktop/gui.h"
#include "desktop/netsurf.h"
#include "desktop/options.h"
#include "gtk/gtk_gui.h"
#include "gtk/gtk_options.h"
#include "gtk/gtk_completion.h"
#include "gtk/gtk_window.h"
#include "gtk/options.h"
#include "gtk/gtk_throbber.h"
#include "gtk/gtk_history.h"
#include "gtk/gtk_filetype.h"
#include "gtk/gtk_download.h"
#include "render/box.h"
#include "render/form.h"
#include "render/html.h"
#include "utils/log.h"
#include "utils/messages.h"
#include "utils/url.h"
#include "utils/utf8.h"
#include "utils/utils.h"

/* Where to search for shared resources.  Must have trailing / */
#define RESPATH "/usr/share/netsurf/"

bool gui_in_multitask = false;

char *default_stylesheet_url;
char *adblock_stylesheet_url;
char *options_file_location;
char *glade_file_location;

struct gui_window *search_current_window = 0;

GtkWindow *wndAbout;
GtkWindow *wndWarning;
GladeXML *gladeWindows;
GtkWindow *wndTooltip;
GtkLabel *labelTooltip;
GtkDialog *wndOpenFile;

static GtkWidget *select_menu;
static struct browser_window *select_menu_bw;
static struct form_control *select_menu_control;

static void nsgtk_create_ssl_verify_window(struct browser_window *bw,
		struct content *c, const struct ssl_cert_info *certs,
		unsigned long num);
static void nsgtk_ssl_accept(GtkButton *w, gpointer data);
static void nsgtk_ssl_reject(GtkButton *w, gpointer data);
static void nsgtk_select_menu_clicked(GtkCheckMenuItem *checkmenuitem,
					gpointer user_data);

/**
 * Locate a shared resource file by searching known places in order.
 *
 * \param  buf      buffer to write to.  must be at least PATH_MAX chars
 * \param  filename file to look for
 * \param  def      default to return if file not found
 * \return buf
 *
 * Search order is: ~/.netsurf/, $NETSURFRES/ (where NETSURFRES is an
 * environment variable), and finally the path specified by the #define
 * at the top of this file.
 */

static char *find_resource(char *buf, const char *filename, const char *def)
{
	char *cdir = getenv("HOME");
	char t[PATH_MAX];

	if (cdir != NULL) {
		strcpy(t, cdir);
		strcat(t, "/.netsurf/");
		strcat(t, filename);
		realpath(t, buf);
		if (access(buf, R_OK) == 0)
			return buf;
	}

	cdir = getenv("NETSURFRES");

	if (cdir != NULL) {
		realpath(cdir, buf);
		strcat(buf, "/");
		strcat(buf, filename);
		if (access(buf, R_OK) == 0)
			return buf;
	}

	strcpy(t, RESPATH);
	strcat(t, filename);
	realpath(t, buf);
	if (access(buf, R_OK) == 0)
		return buf;

	if (def[0] == '~') {
		snprintf(t, PATH_MAX, "%s%s", getenv("HOME"), def + 1);
		realpath(t, buf);
	} else {
		realpath(def, buf);
	}

	return buf;
}

/**
 * Check that ~/.netsurf/ exists, and if it doesn't, create it.
 */
static void check_homedir(void)
{
	char *hdir = getenv("HOME");
	char buf[BUFSIZ];

	if (hdir == NULL) {
		/* we really can't continue without a home directory. */
		LOG(("HOME is not set - nowhere to store state!"));
		die("NetSurf requires HOME to be set in order to run.\n");

	}

	snprintf(buf, BUFSIZ, "%s/.netsurf", hdir);
	if (access(buf, F_OK) != 0) {
		LOG(("You don't have a ~/.netsurf - creating one for you."));
		if (mkdir(buf, 0777) == -1) {
			LOG(("Unable to create %s", buf));
			die("NetSurf requires ~/.netsurf to exist, but it cannot be created.\n");
		}
	}
}

void gui_init(int argc, char** argv)
{
	char buf[PATH_MAX];
	PangoFontDescription *fontdesc;

	gtk_init(&argc, &argv);

	check_homedir();

	find_resource(buf, "netsurf.glade", "./gtk/res/netsurf.glade");
	LOG(("Using '%s' as Glade template file", buf));
	glade_file_location = strdup(buf);

	glade_init();
	gladeWindows = glade_xml_new(glade_file_location, NULL, NULL);
	if (gladeWindows == NULL)
		die("Unable to load Glade window definitions.\n");
	glade_xml_signal_autoconnect(gladeWindows);

	find_resource(buf, "netsurf.xpm", "./gtk/res/netsurf.xpm");
	gtk_window_set_default_icon_from_file(buf, NULL);

	wndTooltip = GTK_WINDOW(glade_xml_get_widget(gladeWindows, "wndTooltip"));
	labelTooltip = GTK_LABEL(glade_xml_get_widget(gladeWindows, "tooltip"));

	nsgtk_completion_init();

	find_resource(buf, "throbber.gif", "./gtk/res/throbber.gif");
	nsgtk_throbber_initialise(buf);
	if (nsgtk_throbber == NULL)
		die("Unable to load throbber image.\n");

	find_resource(buf, "Choices", "~/.netsurf/Choices");
	LOG(("Using '%s' as Preferences file", buf));
	options_file_location = strdup(buf);
	options_read(buf);

	/* check what the font settings are, setting them to a default font
	 * if they're not set - stops Pango whinging
	 */
#define SETFONTDEFAULT(x,y) (x) = ((x) != NULL) ? (x) : strdup((y))
	SETFONTDEFAULT(option_font_sans, "Sans");
	SETFONTDEFAULT(option_font_serif, "Serif");
	SETFONTDEFAULT(option_font_mono, "Monospace");
	SETFONTDEFAULT(option_font_cursive, "Serif");
	SETFONTDEFAULT(option_font_fantasy, "Serif");

	nsgtk_options_init();

	if (!option_cookie_file) {
		find_resource(buf, "Cookies", "~/.netsurf/Cookies");
		LOG(("Using '%s' as Cookies file", buf));
		option_cookie_file = strdup(buf);
	}
	if (!option_cookie_jar) {
		find_resource(buf, "Cookies", "~/.netsurf/Cookies");
		LOG(("Using '%s' as Cookie Jar file", buf));
		option_cookie_jar = strdup(buf);
	}
	if (!option_cookie_file || !option_cookie_jar)
		die("Failed initialising cookie options");

	if (!option_url_file) {
		find_resource(buf, "URLs", "~/.netsurf/URLs");
		LOG(("Using '%s' as URL file", buf));
		option_url_file = strdup(buf);
	}

        if (!option_ca_path) {
                find_resource(buf, "certs", "/etc/ssl/certs");
                LOG(("Using '%s' as certificate path", buf));
                option_ca_path = strdup(buf);
        }

	find_resource(buf, "messages", "./gtk/res/messages");
	LOG(("Using '%s' as Messages file", buf));
	messages_load(buf);

	find_resource(buf, "mime.types", "/etc/mime.types");
	gtk_fetch_filetype_init(buf);

	/* set up stylesheet urls */
	find_resource(buf, "gtkdefault.css", "./gtk/res/gtkdefault.css");
	default_stylesheet_url = path_to_url(buf);
	LOG(("Using '%s' as Default CSS URL", default_stylesheet_url));

	find_resource(buf, "adblock.css", "./gtk/res/adblock.css");
	adblock_stylesheet_url = path_to_url(buf);
	LOG(("Using '%s' as AdBlock CSS URL", adblock_stylesheet_url));

	urldb_load(option_url_file);
	urldb_load_cookies(option_cookie_file);

	wndAbout = GTK_WINDOW(glade_xml_get_widget(gladeWindows, "wndAbout"));
	gtk_label_set_text(GTK_LABEL(
		glade_xml_get_widget(gladeWindows, "labelVersion")),
		netsurf_version);
	gtk_image_set_from_file(GTK_IMAGE(
		glade_xml_get_widget(gladeWindows, "imageLogo")),
		find_resource(buf, "netsurf-logo.png", "netsurf-logo.png"));
	fontdesc = pango_font_description_from_string("Monospace 8");
	gtk_widget_modify_font(GTK_WIDGET(
		glade_xml_get_widget(gladeWindows, "textviewGPL")), fontdesc);

	wndWarning = GTK_WINDOW(glade_xml_get_widget(gladeWindows, "wndWarning"));
	wndOpenFile = GTK_DIALOG(glade_xml_get_widget(gladeWindows, "wndOpenFile"));

	nsgtk_history_init();
	nsgtk_download_initialise();
}


void gui_init2(int argc, char** argv)
{
	const char *addr = "http://netsurf-browser.org/welcome/";

        if (option_homepage_url != NULL && option_homepage_url[0] != '\0')
                addr = option_homepage_url;

	if (argc > 1) addr = argv[1];
	browser_window_create(addr, 0, 0, true);
}


void gui_poll(bool active)
{
	CURLMcode code;
	fd_set read_fd_set, write_fd_set, exc_fd_set;
	int max_fd;
	GPollFD *fd_list[1000];
	unsigned int fd_count = 0;
	bool block = true;

	if (browser_reformat_pending)
		block = false;

	if (active) {
		fetch_poll();
		FD_ZERO(&read_fd_set);
		FD_ZERO(&write_fd_set);
		FD_ZERO(&exc_fd_set);
		code = curl_multi_fdset(fetch_curl_multi,
				&read_fd_set,
				&write_fd_set,
				&exc_fd_set,
				&max_fd);
		assert(code == CURLM_OK);
		for (int i = 0; i <= max_fd; i++) {
			if (FD_ISSET(i, &read_fd_set)) {
				GPollFD *fd = malloc(sizeof *fd);
				fd->fd = i;
				fd->events = G_IO_IN | G_IO_HUP | G_IO_ERR;
				g_main_context_add_poll(0, fd, 0);
				fd_list[fd_count++] = fd;
			}
			if (FD_ISSET(i, &write_fd_set)) {
				GPollFD *fd = malloc(sizeof *fd);
				fd->fd = i;
				fd->events = G_IO_OUT | G_IO_ERR;
				g_main_context_add_poll(0, fd, 0);
				fd_list[fd_count++] = fd;
			}
			if (FD_ISSET(i, &exc_fd_set)) {
				GPollFD *fd = malloc(sizeof *fd);
				fd->fd = i;
				fd->events = G_IO_ERR;
				g_main_context_add_poll(0, fd, 0);
				fd_list[fd_count++] = fd;
			}
		}
	}

	gtk_main_iteration_do(block);

	for (unsigned int i = 0; i != fd_count; i++) {
		g_main_context_remove_poll(0, fd_list[i]);
		free(fd_list[i]);
	}

	schedule_run();

	if (browser_reformat_pending)
		nsgtk_window_process_reformats();
}


void gui_multitask(void)
{
	gui_in_multitask = true;
	while (gtk_events_pending())
		gtk_main_iteration();
	gui_in_multitask = false;
}


void gui_quit(void)
{
	urldb_save_cookies(option_cookie_jar);
	urldb_save(option_url_file);
	free(default_stylesheet_url);
	free(adblock_stylesheet_url);
	free(option_cookie_file);
	free(option_cookie_jar);
	gtk_fetch_filetype_fin();
}



struct gui_download_window *gui_download_window_create(const char *url,
		const char *mime_type, struct fetch *fetch,
		unsigned int total_size)
{
	return 0;
}


void gui_download_window_data(struct gui_download_window *dw, const char *data,
		unsigned int size)
{
}


void gui_download_window_error(struct gui_download_window *dw,
		const char *error_msg)
{
}


void gui_download_window_done(struct gui_download_window *dw)
{
}

static void nsgtk_select_menu_clicked(GtkCheckMenuItem *checkmenuitem,
					gpointer user_data) 
{
	browser_window_form_select(select_menu_bw, select_menu_control,
					(intptr_t)user_data);
}

void gui_create_form_select_menu(struct browser_window *bw,
		struct form_control *control)
{

	intptr_t i;
	struct form_option *option;
	
	GtkWidget *menu_item;

	/* control->data.select.multiple is true if multiple selections
	 * are allowable.  We ignore this, as the core handles it for us.
	 * Yay. \o/
	 */
	
	if (select_menu != NULL)
		gtk_widget_destroy(select_menu);
	
	select_menu = gtk_menu_new();
	select_menu_bw = bw;
	select_menu_control = control;

	for (i = 0, option = control->data.select.items; option;
		i++, option = option->next) {
		menu_item = gtk_check_menu_item_new_with_label(option->text);
		if (option->selected)
			gtk_check_menu_item_set_active(
				GTK_CHECK_MENU_ITEM(menu_item), TRUE);
		
		g_signal_connect(menu_item, "toggled",
			G_CALLBACK(nsgtk_select_menu_clicked), (gpointer)i);
		
		gtk_menu_shell_append(GTK_MENU_SHELL(select_menu), menu_item);
	}
	
	gtk_widget_show_all(select_menu);
	
	gtk_menu_popup(GTK_MENU(select_menu), NULL, NULL, NULL,
			NULL /* data */, 0, gtk_get_current_event_time());

}

void gui_window_save_as_link(struct gui_window *g, struct content *c)
{
}

void gui_launch_url(const char *url)
{
}


bool gui_search_term_highlighted(struct gui_window *g,
		unsigned start_offset, unsigned end_offset,
		unsigned *start_idx, unsigned *end_idx)
{
	return false;
}


void warn_user(const char *warning, const char *detail)
{
	char buf[300];	/* 300 is the size the RISC OS GUI uses */

  	LOG(("%s %s", warning, detail ? detail : ""));
	fflush(stdout);

	snprintf(buf, sizeof(buf), "%s %s", messages_get(warning),
			detail ? detail : "");
	buf[sizeof(buf) - 1] = 0;

	gtk_label_set_text(GTK_LABEL(glade_xml_get_widget(gladeWindows, "labelWarning")), buf);

	gtk_widget_show_all(GTK_WIDGET(wndWarning));
}

void die(const char * const error)
{
	fprintf(stderr, "%s", error);
	exit(EXIT_FAILURE);
}


void hotlist_visited(struct content *content)
{
}

void gui_cert_verify(struct browser_window *bw, struct content *c,
		const struct ssl_cert_info *certs, unsigned long num)
{
	nsgtk_create_ssl_verify_window(bw, c, certs, num);
}

static void nsgtk_create_ssl_verify_window(struct browser_window *bw,
		struct content *c, const struct ssl_cert_info *certs,
		unsigned long num)
{
	GladeXML *x = glade_xml_new(glade_file_location, NULL, NULL);
	GtkWindow *wnd = GTK_WINDOW(glade_xml_get_widget(x, "wndSSLProblem"));
	GtkButton *accept, *reject;
	void **session = calloc(sizeof(void *), 4);
	
	session[0] = bw;
	session[1] = strdup(c->url);
	session[2] = x;
	session[3] = wnd;
	
	accept = GTK_BUTTON(glade_xml_get_widget(x, "sslaccept"));
	reject = GTK_BUTTON(glade_xml_get_widget(x, "sslreject"));
	
	g_signal_connect(G_OBJECT(accept), "clicked",
			G_CALLBACK(nsgtk_ssl_accept), (gpointer)session);
	g_signal_connect(G_OBJECT(reject), "clicked",
			G_CALLBACK(nsgtk_ssl_reject), (gpointer)session);
	
	gtk_widget_show(GTK_WIDGET(wnd));	
}

static void nsgtk_ssl_accept(GtkButton *w, gpointer data)
{
	void **session = data;
	struct browser_window *bw = session[0];
	char *url = session[1];
	GladeXML *x = session[2];
	GtkWindow *wnd = session[3];
	
  	urldb_set_cert_permissions(url, true);
	browser_window_go(bw, url, 0, true);	
	
	gtk_widget_destroy(GTK_WIDGET(wnd));
	g_object_unref(G_OBJECT(x));
	free(url);
	free(session);
}

static void nsgtk_ssl_reject(GtkButton *w, gpointer data)
{
	void **session = data;
	GladeXML *x = session[2];
	GtkWindow *wnd = session[3];
		
	gtk_widget_destroy(GTK_WIDGET(wnd));
	g_object_unref(G_OBJECT(x));
	free(session[1]);
	free(session);
}

utf8_convert_ret utf8_to_local_encoding(const char *string, size_t len,
		char **result)
{
	assert(string && result);

	if (len == 0)
		len = strlen(string);

	*result = strndup(string, len);
	if (!(*result))
		return UTF8_CONVERT_NOMEM;

	return UTF8_CONVERT_OK;
}

utf8_convert_ret utf8_from_local_encoding(const char *string, size_t len,
		char **result)
{
	assert(string && result);

	if (len == 0)
		len = strlen(string);

	*result = strndup(string, len);
	if (!(*result))
		return UTF8_CONVERT_NOMEM;

	return UTF8_CONVERT_OK;
}

char *path_to_url(const char *path)
{
	char *r = malloc(strlen(path) + 7 + 1);

	strcpy(r, "file://");
	strcat(r, path);

	return r;
}

char *url_to_path(const char *url)
{
	return strdup(url + 5);
}

bool cookies_update(const char *domain, const struct cookie_data *data)
{
	return true;
}