/*
 * Web view settings
 *
 * Copyright (C) 2017  Patrick McDermott
 *
 * This file is part of Marquee.
 *
 * Marquee 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.
 *
 * Marquee 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 Marquee.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "settings.h"

#include <glib.h>
#include <webkit2/webkit2.h>

#include "config.h"

enum mapping_type {
	MAP_BOOL,
	MAP_BOOL_N,
	MAP_INT,
	/* MAP_DBL, */
	MAP_STR,
	/* MAP_STRL, */
};

struct mapping {
	enum mapping_type  type;
	const gchar       *mq_name;
	const gchar       *wk_name;
};

static struct mapping mappings[] = {
	/* General -> Navigation and Accessibility */
	{MAP_BOOL,   "navigation.smooth-scrolling",
	             "enable-smooth-scrolling"},
	{MAP_BOOL,   "navigation.tabbing",
	             "enable-tabs-to-links"},
	{MAP_BOOL,   "navigation.caret",
	             "enable-caret-browsing"},
	{MAP_BOOL,   "navigation.spatial",
	             "enable-spatial-navigation"},

	/* General -> Miscellaneous */
	{MAP_BOOL,   "display.textarea.resize.enable",
	             "enable-resizable-text-areas"},
	{MAP_BOOL,   "devtools.enable",
	             "enable-developer-extras"},

	/* General -> Compatibility */
	// compatibility.user-agent
	{MAP_BOOL,   "compatibility.quirks",
	             "enable-site-specific-quirks"},

	/* Display -> Fonts */
	{MAP_STR,    "font.family.default",
	             "default-font-family"},
	{MAP_STR,    "font.family.monospace",
	             "monospace-font-family"},
	{MAP_STR,    "font.family.serif",
	             "serif-font-family"},
	{MAP_STR,    "font.family.sans-serif",
	             "sans-serif-font-family"},
	{MAP_STR,    "font.family.cursive",
	             "cursive-font-family"},
	{MAP_STR,    "font.family.fantasy",
	             "fantasy-font-family"},
	{MAP_STR,    "font.family.pictograph",
	             "pictograph-font-family"},
	{MAP_INT,    "font.size.default",
	             "default-font-size"},
	{MAP_INT,    "font.size.monospace-default",
	             "default-monospace-font-size"},
	{MAP_INT,    "font.size.minimum",
	             "minimum-font-size"},

	/* Display -> Languages */
	{MAP_STR,    "intl.default-charset",
	             "default-charset"},

	/* Display -> Zoom */
	{MAP_BOOL,   "zoom.text-only",
	             "zoom-text-only"},

	/* Permissions -> General */
	{MAP_BOOL,   "permissions.images.auto-load",
	             "auto-load-images"},
	{MAP_BOOL,   "permissions.images.favicons.override",
	             "load-icons-ignoring-image-load-setting"},
	{MAP_BOOL,   "permissions.java.enable",
	             "enable-java"},
	{MAP_BOOL,   "permissions.javascript.enable",
	             "enable-javascript"},
	{MAP_BOOL,   "permissions.plugins.enable",
	             "enable-plugins"},

	/* Permissions -> JavaScript */
	{MAP_BOOL,   "permissions.javascript.open-windows",
	             "javascript-can-open-windows-automatically"},
	{MAP_BOOL,   "permissions.javascript.fullscreen",
	             "enable-fullscreen"},
	{MAP_BOOL,   "permissions.javascript.modal-dialogs",
	             "allow-modal-dialogs"},
	{MAP_BOOL,   "permissions.javascript.clipboard",
	             "javascript-can-access-clipboard"},

	/* Permissions -> Data Storage */
	{MAP_BOOL,   "permissions.javascript.database",
	             "enable-html5-database"},
	{MAP_BOOL,   "permissions.javascript.storage",
	             "enable-html5-local-storage"},
	{MAP_BOOL,   "permissions.appcache",
	             "enable-offline-web-application-cache"},

	/* Permissions -> Graphics and Multimedia */
	{MAP_BOOL,   "canvas.acceleration.enable",
	             "enable-accelerated-2d-canvas"},
	{MAP_BOOL,   "permissions.javascript.webgl",
	             "enable-webgl"},
	{MAP_BOOL,   "permissions.javascript.audio",
	             "enable-webaudio"},
	{MAP_BOOL_N, "media.autoplay",
	             "media-playback-requires-user-gesture"},
	{MAP_BOOL_N, "media.force-fullscreen",
	             "media-playback-allows-inline"},
	{MAP_BOOL,   "permissions.javascript.mediastream.enable",
	             "enable-media-stream"},
	{MAP_BOOL,   "permissions.javascript.mediasource.enable",
	             "enable-mediasource"},

	/* Security and Privacy -> History */
	{MAP_BOOL,   "privacy.private-browsing.enabled",
	             "enable-private-browsing"},

	/* Security and Privacy -> Security */
	{MAP_BOOL,   "security.xss-auditor.enable",
	             "enable-xss-auditor"},

	/* Security and Privacy -> Network */
	{MAP_BOOL,   "dns.prefetch.enable",
	             "enable-dns-prefetching"},
};

static GHashTable *mappings_table = NULL;

static gboolean true_value = TRUE;

struct _MqSettings {
	WebKitSettings    parent_instance;
	WebKitWebContext *web_context;
	GHashTable       *overrides;
};

struct _MqSettingsClass {
	WebKitSettingsClass parent_class;
};

G_DEFINE_TYPE(MqSettings, mq_settings, WEBKIT_TYPE_SETTINGS)

static void
init_mappings_table(void)
{
	gsize i;

	if (mappings_table) {
		return;
	}

	mappings_table = g_hash_table_new(g_str_hash, g_str_equal);

	for (i = 0; i < sizeof(mappings) / sizeof(mappings[0]); ++i) {
		g_hash_table_insert(mappings_table,
			g_strdup(mappings[i].mq_name), &mappings[i]);
	}
}

static void
mq_settings_class_init(MqSettingsClass G_GNUC_UNUSED *klass)
{
}

static void
mq_settings_init(MqSettings *settings)
{
	init_mappings_table();

	settings->overrides = g_hash_table_new_full(g_str_hash, g_str_equal,
		g_free, NULL);
}

MqSettings *
mq_settings_new(void)
{
	return g_object_new(MQ_TYPE_SETTINGS, NULL);
}

void
mq_settings_set_web_context(MqSettings *settings, WebKitWebContext *web_context)
{
	settings->web_context = web_context;
}

#define is_neg(NAME) \
	(((struct mapping *) g_hash_table_lookup(mappings_table, \
				NAME))->type == MAP_BOOL_N)
#define map_name(NAME) \
	(((struct mapping *) g_hash_table_lookup(mappings_table, \
				NAME))->wk_name)

static void
set_bool(MqSettings *settings, const gchar *name, const gboolean value)
{
	GValue g_value = G_VALUE_INIT;

	g_value_init(&g_value, G_TYPE_BOOLEAN);
	g_value_set_boolean(&g_value, is_neg(name) ? !value : value);
	g_object_set_property(G_OBJECT(settings), map_name(name), &g_value);
}

static void
set_int(MqSettings *settings, const gchar *name, const gint value)
{
	GValue g_value = G_VALUE_INIT;

	g_value_init(&g_value, G_TYPE_INT);
	g_value_set_int(&g_value, value);
	g_object_set_property(G_OBJECT(settings), map_name(name), &g_value);
}

static void
set_str(MqSettings *settings, const gchar *name, const gchar *value)
{
	GValue g_value = G_VALUE_INIT;

	g_value_init(&g_value, G_TYPE_STRING);
	g_value_set_static_string(&g_value, value);
	g_object_set_property(G_OBJECT(settings), map_name(name), &g_value);
}

void
mq_settings_override_bool(MqSettings *settings, const gchar *name,
	const gboolean value)
{
	g_hash_table_insert(settings->overrides, g_strdup(name), &true_value);
	set_bool(settings, name, value);
}

void
mq_settings_override_int(MqSettings *settings, const gchar *name,
	const gint value)
{
	g_hash_table_insert(settings->overrides, g_strdup(name), &true_value);
	set_int(settings, name, value);
}

void
mq_settings_override_str(MqSettings *settings, const gchar *name,
	const gchar *value)
{
	g_hash_table_insert(settings->overrides, g_strdup(name), &true_value);
	set_str(settings, name, value);
}

static void
bool_cb(MqConfig G_GNUC_UNUSED *config, const gchar *name,
	const gboolean value, MqSettings *settings)
{
	set_bool(settings, name, value);
}

static void
bool_n_cb(MqConfig G_GNUC_UNUSED *config, const gchar *name,
	const gboolean value, MqSettings *settings)
{
	set_bool(settings, name, value);
}

static void
int_cb(MqConfig G_GNUC_UNUSED *config, const gchar *name,
	const gint value, MqSettings *settings)
{
	set_int(settings, name, value);
}

static void
str_cb(MqConfig G_GNUC_UNUSED *config, const gchar *name,
	const gchar *value, MqSettings *settings)
{
	set_str(settings, name, value);
}

static void
wc_spell_checking_enabled_cb(MqConfig G_GNUC_UNUSED *config,
	const gchar G_GNUC_UNUSED *name, const gboolean value,
	WebKitWebContext *web_context)
{
	webkit_web_context_set_spell_checking_enabled(web_context, value);
}

static void
wc_spell_checking_languages_cb(MqConfig *config, const gchar *name,
	const gchar G_GNUC_UNUSED *value, WebKitWebContext *web_context)
{
	webkit_web_context_set_spell_checking_languages(web_context,
		(const gchar * const *) mq_config_get_string_list(config,
			name));
}

static void
wc_preferred_languages_cb(MqConfig *config, const gchar *name,
	const gchar G_GNUC_UNUSED *value, WebKitWebContext *web_context)
{
	webkit_web_context_set_preferred_languages(web_context,
		(const gchar * const *) mq_config_get_string_list(config,
			name));
}

static void
cm_accept_policy_cb(MqConfig G_GNUC_UNUSED *config,
	const gchar G_GNUC_UNUSED *name, const gchar *value,
	WebKitCookieManager *cookie_manager)
{
	if (g_strcmp0(value, "always") == 0) {
		webkit_cookie_manager_set_accept_policy(cookie_manager,
			WEBKIT_COOKIE_POLICY_ACCEPT_ALWAYS);
	} else if (g_strcmp0(value, "never") == 0) {
		webkit_cookie_manager_set_accept_policy(cookie_manager,
			WEBKIT_COOKIE_POLICY_ACCEPT_NEVER);
	} else if (g_strcmp0(value, "no-third-party") == 0) {
		webkit_cookie_manager_set_accept_policy(cookie_manager,
			WEBKIT_COOKIE_POLICY_ACCEPT_NO_THIRD_PARTY);
	} else {
		g_assert_not_reached();
	}
}

void
mq_settings_connect_config(MqSettings *settings, MqConfig *config)
{
	gsize                i;
	WebKitCookieManager *cookie_manager;

	/* mq_settings_set_web_context() must be called first. */
	g_assert(settings->web_context);

	cookie_manager = webkit_web_context_get_cookie_manager(
		settings->web_context);

	for (i = 0; i < sizeof(mappings) / sizeof(mappings[0]); ++i) {
		if (g_hash_table_lookup(settings->overrides,
				mappings[i].mq_name)) {
			continue;
		}
		switch (mappings[i].type) {
			case MAP_BOOL:
				mq_config_notify_boolean(config,
					mappings[i].mq_name,
					(MqConfigBooleanCallback) bool_cb,
					settings);
				bool_cb(config, mappings[i].mq_name,
					mq_config_get_boolean(config,
						mappings[i].mq_name),
					settings);
				break;
			case MAP_BOOL_N:
				mq_config_notify_boolean(config,
					mappings[i].mq_name,
					(MqConfigBooleanCallback) bool_n_cb,
					settings);
				bool_n_cb(config, mappings[i].mq_name,
					mq_config_get_boolean(config,
						mappings[i].mq_name),
					settings);
				break;
			case MAP_INT:
				mq_config_notify_integer(config,
					mappings[i].mq_name,
					(MqConfigIntegerCallback) int_cb,
					settings);
				int_cb(config, mappings[i].mq_name,
					mq_config_get_integer(config,
						mappings[i].mq_name),
					settings);
				break;
			case MAP_STR:
				mq_config_notify_string(config,
					mappings[i].mq_name,
					(MqConfigStringCallback) str_cb,
					settings);
				str_cb(config, mappings[i].mq_name,
					mq_config_get_string(config,
						mappings[i].mq_name),
					settings);
				break;
		}
	}

	/* The overrides table is no longer needed. */
	g_hash_table_unref(settings->overrides);

	/* General -> Spell Checking */
	mq_config_notify_boolean(config, "spell.enable",
		(MqConfigBooleanCallback) wc_spell_checking_enabled_cb,
		settings->web_context);
	wc_spell_checking_enabled_cb(config, "spell.enable",
		mq_config_get_boolean(config, "spell.enable"),
		settings->web_context);
	mq_config_notify_string(config, "spell.langs",
		(MqConfigStringCallback) wc_spell_checking_languages_cb,
		settings->web_context);
	wc_spell_checking_languages_cb(config, "spell.langs", NULL,
		settings->web_context);

	/* Display -> Languages */
	mq_config_notify_string(config, "intl.accept-languages",
		(MqConfigStringCallback) wc_preferred_languages_cb,
		settings->web_context);
	wc_preferred_languages_cb(config, "intl.accept-languages", NULL,
		settings->web_context);

	/* Security and Privacy -> Cookies */
	mq_config_notify_string(config, "cookies.accept",
		(MqConfigStringCallback) cm_accept_policy_cb,
		cookie_manager);
	cm_accept_policy_cb(config, "cookies.accept",
		mq_config_get_string(config, "cookies.accept"),
		cookie_manager);
}