/**
 * Copyright (c) 2013, Redsolution LTD. All rights reserved.
 *
 * This file is part of Xabber project; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License, Version 3.
 *
 * Xabber 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/.
 */
package com.xabber.android.data;

import android.content.Context;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.content.SharedPreferences.OnSharedPreferenceChangeListener;
import android.net.Uri;
import android.preference.PreferenceManager;
import android.provider.Settings;
import android.text.TextUtils;

import com.xabber.android.R;
import com.xabber.android.data.account.AccountManager;
import com.xabber.android.data.account.StatusMode;
import com.xabber.android.data.connection.NetworkManager;
import com.xabber.android.data.extension.attention.AttentionManager;
import com.xabber.android.data.extension.otr.OTRManager;
import com.xabber.android.data.message.MessageManager;
import com.xabber.android.data.notification.NotificationManager;
import com.xabber.android.data.roster.AbstractContact;
import com.xabber.android.service.XabberService;
import com.xabber.android.ui.adapter.ComparatorByName;
import com.xabber.android.ui.adapter.ComparatorByStatus;
import com.xabber.xmpp.carbon.CarbonManager;

import java.util.Comparator;

/**
 * Manage operations with common settings.
 *
 * @author alexander.ivanov
 */
public class SettingsManager implements OnInitializedListener,
        OnMigrationListener, OnSharedPreferenceChangeListener {

    private static final SettingsManager instance;

    static {
        instance = new SettingsManager();
        Application.getInstance().addManager(instance);
    }

    private SettingsManager() {
        getSharedPreferences().registerOnSharedPreferenceChangeListener(this);
    }

    public static SettingsManager getInstance() {
        return instance;
    }

    private static SharedPreferences getSharedPreferences() {
        return PreferenceManager.getDefaultSharedPreferences(Application
                .getInstance());
    }

    private static int getInt(int key, int def) {
        String value = getString(key, def);
        try {
            return Integer.parseInt(value);
        } catch (NumberFormatException e) {
            return Integer.parseInt(Application.getInstance().getString(def));
        }
    }

    private static boolean getBoolean(int key, boolean def) {
        return getSharedPreferences().getBoolean(
                Application.getInstance().getString(key), def);
    }

    private static boolean getBoolean(int key, int def) {
        return getBoolean(key, Application.getInstance().getResources()
                .getBoolean(def));
    }

    private static void setBoolean(int key, boolean value) {
        Editor editor = getSharedPreferences().edit();
        editor.putBoolean(Application.getInstance().getString(key), value);
        editor.commit();
    }

    private static String getString(int key, String def) {
        return getSharedPreferences().getString(
                Application.getInstance().getString(key), def);
    }

    private static String getString(int key, int def) {
        return getString(key, Application.getInstance().getString(def));
    }

    private static void setString(int key, String value) {
        Editor editor = getSharedPreferences().edit();
        editor.putString(Application.getInstance().getString(key), value);
        editor.commit();
    }

    /**
     * @param key
     * @param defaultUri
     * @return Sound uri. Sets defaulUri if value is default.
     */
    private static Uri getSound(int key, Uri defaultUri, int defaultResource) {
        String defaultValue = Application.getInstance().getString(
                defaultResource);
        String value = getString(key, defaultValue);
        if (TextUtils.isEmpty(value))
            return null;
        if (defaultValue.equals(value)) {
            setString(key, defaultUri.toString());
            return defaultUri;
        }
        return Uri.parse(value);
    }

    public static boolean contactsShowAvatars() {
        return getBoolean(R.string.contacts_show_avatars_key,
                R.bool.contacts_show_avatars_default);
    }

    public static boolean contactsShowOffline() {
        return getBoolean(R.string.contacts_show_offline_key,
                R.bool.contacts_show_offline_default);
    }

    public static void setContactsShowOffline(boolean show) {
        setBoolean(R.string.contacts_show_offline_key, show);
    }

    public static boolean contactsShowGroups() {
        return getBoolean(R.string.contacts_show_groups_key,
                R.bool.contacts_show_groups_default);
    }

    public static boolean contactsShowEmptyGroups() {
        return getBoolean(R.string.contacts_show_empty_groups_key,
                R.bool.contacts_show_empty_groups_default);
    }

    public static boolean contactsShowActiveChats() {
        return getBoolean(R.string.contacts_show_active_chats_key,
                R.bool.contacts_show_active_chats_default);
    }

    public static boolean contactsStayActiveChats() {
        return getBoolean(R.string.contacts_stay_active_chats_key,
                R.bool.contacts_stay_active_chats_default);
    }

    public static boolean contactsShowAccounts() {
        return getBoolean(R.string.contacts_show_accounts_key,
                R.bool.contacts_show_accounts_default);
    }

    public static Comparator<AbstractContact> contactsOrder() {
        String value = getString(R.string.contacts_order_key,
                R.string.contacts_order_default);
        if (Application.getInstance()
                .getString(R.string.contacts_order_alphabet_value)
                .equals(value))
            return ComparatorByName.COMPARATOR_BY_NAME;
        else if (Application.getInstance()
                .getString(R.string.contacts_order_status_value).equals(value))
            return ComparatorByStatus.COMPARATOR_BY_STATUS;
        else
            throw new IllegalStateException();
    }

    public static boolean contactsShowPanel() {
        return getBoolean(R.string.contacts_show_panel_key,
                R.bool.contacts_show_panel_default);
    }

    public static boolean contactsEnableShowAccounts() {
        return getBoolean(R.string.contacts_enable_show_accounts_key,
                R.bool.contacts_enable_show_accounts_default);
    }

    /**
     * DON`T USE THIS METHOD DIRECTLY.
     * <p/>
     * Use {@link AccountManager#getSelectedAccount()} instead.
     *
     * @return
     */
    public static String contactsSelectedAccount() {
        return getString(R.string.contacts_selected_account_key, "");
    }

    public static void setContactsSelectedAccount(String value) {
        if (value == null)
            value = "";
        setString(R.string.contacts_selected_account_key, value);
    }

    public static void enableContactsShowAccount() {
        setBoolean(R.string.contacts_enable_show_accounts_key, false);
        setBoolean(R.string.contacts_show_accounts_key, true);
    }

    /**
     * Gets event sound. It will save DEFAULT_NOTIFICATION_URI if value is
     * default.
     *
     * @return {@link Uri} or <code>null</code>.
     */
    public static Uri eventsSound() {
        return getSound(R.string.events_sound_key,
                Settings.System.DEFAULT_NOTIFICATION_URI,
                R.string.events_sound_default);
    }

    public static boolean eventsVibro() {
        return getBoolean(R.string.events_vibro_key,
                R.bool.events_vibro_default);
    }

    public static boolean eventsIgnoreSystemVibro() {
        return getBoolean(R.string.events_ignore_system_vibro_key,
                R.bool.events_ignore_system_vibro_default);
    }

    public static boolean eventsLightning() {
        return getBoolean(R.string.events_lightning_key,
                R.bool.events_lightning_default);
    }

    public static boolean eventsPersistent() {
        return getBoolean(R.string.events_persistent_key,
                R.bool.events_persistent_default);
    }

    public static boolean eventsShowText() {
        return getBoolean(R.string.events_show_text_key,
                R.bool.events_show_text_default);
    }

    public static EventsMessage eventsMessage() {
        String value = getString(R.string.events_message_key,
                R.string.events_message_default);
        if (Application.getInstance()
                .getString(R.string.events_message_none_value).equals(value))
            return EventsMessage.none;
        else if (Application.getInstance()
                .getString(R.string.events_message_chat_value).equals(value))
            return EventsMessage.chat;
        else if (Application.getInstance()
                .getString(R.string.events_message_chat_and_muc_value)
                .equals(value))
            return EventsMessage.chatAndMuc;
        else
            throw new IllegalStateException();
    }

    public static boolean eventsVisibleChat() {
        return getBoolean(R.string.events_visible_chat_key,
                R.bool.events_visible_chat_default);
    }

    public static boolean eventsFirstOnly() {
        return getBoolean(R.string.events_first_only_key,
                R.bool.events_first_only_default);
    }

    public static boolean chatsShowAvatars() {
        return getBoolean(R.string.chats_show_avatars_key,
                R.bool.chats_show_avatars_default);
    }

    public static boolean chatsSendByEnter() {
        return getBoolean(R.string.chats_send_by_enter_key,
                R.bool.chats_send_by_enter_default);
    }

    public static ChatsShowStatusChange chatsShowStatusChange() {
        String value = getString(R.string.chats_show_status_change_key,
                R.string.chats_show_status_change_default);
        if (Application.getInstance()
                .getString(R.string.chats_show_status_change_always_value)
                .equals(value))
            return ChatsShowStatusChange.always;
        else if (Application.getInstance()
                .getString(R.string.chats_show_status_change_muc_value)
                .equals(value))
            return ChatsShowStatusChange.muc;
        else if (Application.getInstance()
                .getString(R.string.chats_show_status_change_never_value)
                .equals(value))
            return ChatsShowStatusChange.never;
        else
            throw new IllegalStateException();

    }

    public static ChatsHideKeyboard chatsHideKeyboard() {
        String value = getString(R.string.chats_hide_keyboard_key,
                R.string.chats_hide_keyboard_default);
        if (Application.getInstance()
                .getString(R.string.chats_hide_keyboard_always_value)
                .equals(value))
            return ChatsHideKeyboard.always;
        else if (Application.getInstance()
                .getString(R.string.chats_hide_keyboard_landscape_value)
                .equals(value))
            return ChatsHideKeyboard.landscape;
        else if (Application.getInstance()
                .getString(R.string.chats_hide_keyboard_never_value)
                .equals(value))
            return ChatsHideKeyboard.never;
        else
            throw new IllegalStateException();
    }

    public static boolean chatsShowBackground() {
        return getBoolean(R.string.chats_show_background_key, R.bool.chats_show_background_default);
    }

    public static int chatsAppearanceStyle() {
        String value = getString(R.string.chats_font_size_key,
                R.string.chats_font_size_default);
        if (Application.getInstance()
                .getString(R.string.chats_font_size_small_value).equals(value))
            return R.style.ChatText_Small;
        else if (Application.getInstance()
                .getString(R.string.chats_font_size_normal_value).equals(value))
            return R.style.ChatText_Normal;
        else if (Application.getInstance()
                .getString(R.string.chats_font_size_large_value).equals(value))
            return R.style.ChatText_Large;
        else if (Application.getInstance()
                .getString(R.string.chats_font_size_xlarge_value).equals(value))
            return R.style.ChatText_XLarge;
        else
            throw new IllegalStateException();
    }

    public static boolean chatsStateNotification() {
        return getBoolean(R.string.chats_state_notification_key,
                R.bool.chats_state_notification_default);
    }

    public static boolean chatsAttention() {
        return getBoolean(R.string.chats_attention_key,
                R.bool.chats_attention_default);
    }

    /**
     * Gets event sound. It will save DEFAULT_NOTIFICATION_URI if value is
     * default.
     *
     * @return {@link Uri} or <code>null</code>.
     */
    public static Uri chatsAttentionSound() {
        return getSound(R.string.chats_attention_sound_key,
                Settings.System.DEFAULT_RINGTONE_URI,
                R.string.chats_attention_sound_default);
    }

    public static int connectionGoAway() {
        return getInt(R.string.connection_go_away_key,
                R.string.connection_go_away_default);
    }

    public static int connectionGoXa() {
        return getInt(R.string.connection_go_xa_key,
                R.string.connection_go_xa_default);
    }

    public static boolean connectionWifiLock() {
        return getBoolean(R.string.connection_wifi_lock_key,
                R.bool.connection_wifi_lock_default);
    }

    public static boolean connectionWakeLock() {
        return getBoolean(R.string.connection_wake_lock_key,
                R.bool.connection_wake_lock_default);
    }

    public static boolean connectionStartAtBoot() {
        return getBoolean(R.string.connection_start_at_boot_key,
                R.bool.connection_start_at_boot_default);
    }

    public static void setConnectionStartAtBoot(boolean value) {
        setBoolean(R.string.connection_start_at_boot_key, value);
    }

    public static boolean connectionLoadVCard() {
        return getBoolean(R.string.connection_load_vcard_key,
                R.bool.connection_load_vcard_default);
    }

    public static boolean connectionUseCarbons() {
        return getBoolean(R.string.connection_use_carbons_key,
                R.bool.connection_use_carbons_default);
    }

    public static boolean connectionAdjustPriority() {
        return getBoolean(R.string.connection_adjust_priority_key,
                R.bool.connection_adjust_priority_default);
    }

    public static int connectionPriorityAvailable() {
        return getInt(R.string.connection_priority_available_key,
                R.string.connection_priority_available_default);
    }

    public static int connectionPriorityAway() {
        return getInt(R.string.connection_priority_away_key,
                R.string.connection_priority_away_default);
    }

    public static int connectionPriorityChat() {
        return getInt(R.string.connection_priority_chat_key,
                R.string.connection_priority_chat_default);
    }

    public static int connectionPriorityDnd() {
        return getInt(R.string.connection_priority_dnd_key,
                R.string.connection_priority_dnd_default);
    }

    public static int connectionPriorityXa() {
        return getInt(R.string.connection_priority_xa_key,
                R.string.connection_priority_xa_default);
    }

    public static boolean debugLog() {
        return getBoolean(R.string.debug_log_key, R.bool.debug_log_default);
    }

    public static InterfaceTheme interfaceTheme() {
        String value = getString(R.string.interface_theme_key,
                R.string.interface_theme_default);
        if (Application.getInstance()
                .getString(R.string.interface_theme_dark_value).equals(value))
            return InterfaceTheme.dark;
        else if (Application.getInstance()
                .getString(R.string.interface_theme_light_value).equals(value))
            return InterfaceTheme.light;
        else if (Application.getInstance()
                .getString(R.string.interface_theme_normal_value).equals(value))
            return InterfaceTheme.normal;
        else
            throw new IllegalStateException();
    }

    public static boolean securityCheckCertificate() {
        return getBoolean(R.string.security_check_certificate_key,
                R.bool.security_check_certificate_default);
    }

    public static SecurityOtrMode securityOtrMode() {
        String value = getString(R.string.security_otr_mode_key,
                R.string.security_otr_mode_default);
        if (Application.getInstance()
                .getString(R.string.security_otr_mode_disabled_value)
                .equals(value))
            return SecurityOtrMode.disabled;
        else if (Application.getInstance()
                .getString(R.string.security_otr_mode_manual_value)
                .equals(value))
            return SecurityOtrMode.manual;
        else if (Application.getInstance()
                .getString(R.string.security_otr_mode_auto_value).equals(value))
            return SecurityOtrMode.auto;
        else if (Application.getInstance()
                .getString(R.string.security_otr_mode_required_value)
                .equals(value))
            return SecurityOtrMode.required;
        else
            throw new IllegalStateException();
    }

    public static boolean securityOtrHistory() {
        return getBoolean(R.string.security_otr_history_key,
                R.bool.security_otr_history_default);
    }

    public static int bootCount() {
        return getSharedPreferences()
                .getInt(Application.getInstance().getString(
                        R.string.boot_count_key), 0);
    }

    public static void incrementBootCount() {
        Editor editor = getSharedPreferences().edit();
        editor.putInt(
                Application.getInstance().getString(R.string.boot_count_key),
                bootCount() + 1);
        editor.commit();
    }

    public static boolean startAtBootSuggested() {
        return getBoolean(R.string.start_at_boot_suggested_key, false);
    }

    public static void setStartAtBootSuggested() {
        setBoolean(R.string.start_at_boot_suggested_key, true);
    }

    public static boolean contactIntegrationSuggested() {
        return getBoolean(R.string.contact_integration_suggested_key, false);
    }

    public static void setContactIntegrationSuggested() {
        setBoolean(R.string.contact_integration_suggested_key, true);
    }

    /**
     * @return Common status mode for all accounts or
     * {@link StatusMode#available} if mode was not set.
     */
    public static StatusMode statusMode() {
        return StatusMode.valueOf(getString(R.string.status_mode_key,
                StatusMode.available.name()));
    }

    public static void setStatusMode(StatusMode statusMode) {
        setString(R.string.status_mode_key, statusMode.name());
    }

    /**
     * @return Common status text for all accounts.
     */
    public static String statusText() {
        return getString(R.string.status_text_key, "");
    }

    public static void setStatusText(String statusText) {
        setString(R.string.status_text_key, statusText);
    }

    @Override
    public void onInitialized() {
        incrementBootCount();
    }

    @Override
    public void onMigrate(int toVersion) {
        switch (toVersion) {
            case 32:
                setBoolean(R.string.chats_show_status_change_key, false);
                break;
            case 40:
                String value;
                try {
                    if (getBoolean(R.string.chats_show_status_change_key, false))
                        value = Application.getInstance().getString(
                                R.string.chats_show_status_change_always_value);
                    else
                        value = Application.getInstance().getString(
                                R.string.chats_show_status_change_muc_value);
                } catch (ClassCastException e) {
                    value = Application.getInstance().getString(
                            R.string.chats_show_status_change_default);
                }
                setString(R.string.chats_show_status_change_key, value);
                break;
            case 45:
                setBoolean(R.string.chats_show_avatars_key,
                        "message".equals(getString(R.string.chats_show_avatars_key,
                                "")));
                break;
            case 65:
                SharedPreferences settings = Application.getInstance()
                        .getSharedPreferences("accounts", Context.MODE_PRIVATE);
                int statusModeIndex = settings.getInt("status_mode",
                        StatusMode.available.ordinal());
                StatusMode statusMode = StatusMode.values()[statusModeIndex];
                setString(R.string.status_mode_key, statusMode.name());
                String statusText = settings.getString("status_text", "");
                setString(R.string.status_text_key, statusText);
                break;
            default:
                break;
        }
    }

    @Override
    public void onSharedPreferenceChanged(SharedPreferences sharedPreferences,
                                          String key) {
        if (key.equals(Application.getInstance().getString(
                R.string.chats_show_status_change_key))) {
            MessageManager.getInstance().onSettingsChanged();
        } else if (key.equals(Application.getInstance().getString(
                R.string.events_persistent_key))) {
            NotificationManager.getInstance().onMessageNotification();
            XabberService.getInstance().changeForeground();
        } else if (key.equals(Application.getInstance().getString(
                R.string.connection_wake_lock_key))) {
            NetworkManager.getInstance().onWakeLockSettingsChanged();
        } else if (key.equals(Application.getInstance().getString(
                R.string.connection_wifi_lock_key))) {
            NetworkManager.getInstance().onWifiLockSettingsChanged();
        } else if (key.equals(Application.getInstance().getString(
                R.string.connection_use_carbons_key))) {
            CarbonManager.getInstance().onUseCarbonsSettingsChanged();
        } else if (key.equals(Application.getInstance().getString(
                R.string.events_show_text_key))) {
            NotificationManager.getInstance().onMessageNotification();
        } else if (key.equals(Application.getInstance().getString(
                R.string.chats_attention_key))) {
            AttentionManager.getInstance().onSettingsChanged();
        } else if (key.equals(Application.getInstance().getString(
                R.string.security_otr_mode_key))) {
            OTRManager.getInstance().onSettingsChanged();
        }
    }

    public enum ChatsHistory {

        /**
         * Don't store chat messages.
         */
        none,

        /**
         * Store only unread messages.
         */
        unread,

        /**
         * Store all messages.
         */
        all

    }

    public enum InterfaceTheme {

        /**
         * All windows will be dark.
         */
        dark,

        /**
         * All windows will be light.
         */
        light,

        /**
         * Chat will be light, other windows will be dark.
         */
        normal

    }

    public enum EventsMessage {

        /**
         * Never notify.
         */
        none,

        /**
         * Notify in chat only.
         */
        chat,

        /**
         * Notify in chat and muc.
         */
        chatAndMuc

    }

    public enum ChatsShowStatusChange {

        /**
         * Always show status change.
         */
        always,

        /**
         * Show status change only in MUC.
         */
        muc,

        /**
         * Never show status change.
         */
        never

    }

    public enum ChatsHideKeyboard {

        /**
         * Always hide keyboard.
         */
        always,

        /**
         * Hide keyboard only in landscape mode.
         */
        landscape,

        /**
         * Never hide keyboard.
         */
        never,
    }

    public enum SecurityOtrMode {

        /**
         * OTR is disabled.
         */
        disabled,

        /**
         * Manually send request and confirm requests.
         */
        manual,

        /**
         * Automatically try to use OTR.
         */
        auto,

        /**
         * Require to use OTR.
         */
        required

    }

}