package eu.siacs.conversations.ui;

import android.content.Intent;
import android.os.Bundle;
import android.preference.Preference;
import android.preference.PreferenceCategory;
import android.preference.PreferenceFragment;
import android.preference.PreferenceScreen;
import android.text.TextUtils;
import android.widget.ListView;

import java.lang.reflect.Method;

import eu.siacs.conversations.Config;
import eu.siacs.conversations.R;
import eu.siacs.conversations.utils.Compatibility;

public class SettingsFragment extends PreferenceFragment {

	private String page = null;
	private String suffix = null;

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);

		addPreferencesFromResource(R.xml.preferences);

		// Remove from standard preferences if the flag ONLY_INTERNAL_STORAGE is false
		if (!Config.ONLY_INTERNAL_STORAGE) {
			PreferenceCategory mCategory = (PreferenceCategory) findPreference("security_options");
			if (mCategory != null) {
				Preference cleanCache = findPreference("clean_cache");
				Preference cleanPrivateStorage = findPreference("clean_private_storage");
				mCategory.removePreference(cleanCache);
				mCategory.removePreference(cleanPrivateStorage);
			}
		}
		Compatibility.removeUnusedPreferences(this);

		if (!TextUtils.isEmpty(page)) {
			openPreferenceScreen(page);
		}

	}

	@Override
	public void onActivityCreated(Bundle bundle) {
		super.onActivityCreated(bundle);

		final ListView listView = getActivity().findViewById(android.R.id.list);
		if (listView != null) {
			listView.setDivider(null);
		}
	}

	public void setActivityIntent(final Intent intent) {
		boolean wasEmpty = TextUtils.isEmpty(page);
		if (intent != null) {
			if (Intent.ACTION_VIEW.equals(intent.getAction())) {
				if (intent.getExtras() != null) {
					this.page = intent.getExtras().getString("page");
					this.suffix = intent.getExtras().getString("suffix");
					if (wasEmpty) {
						openPreferenceScreen(page);
					}
				}
			}
		}
	}

	private void openPreferenceScreen(final String screenName) {
		final Preference pref = findPreference(screenName);
		if (pref instanceof PreferenceScreen) {
			final PreferenceScreen preferenceScreen = (PreferenceScreen) pref;
			getActivity().setTitle(preferenceScreen.getTitle());
			preferenceScreen.setDependency("");
			if (this.suffix != null) {
				for (int i = 0; i < preferenceScreen.getPreferenceCount(); i++) {
					final Preference p = preferenceScreen.getPreference(i);
					if (!p.hasKey()) continue;
					p.setKey(p.getKey() + this.suffix);
					if (p.getDependency() != null && !"".equals(p.getDependency())) {
						p.setDependency(p.getDependency() + this.suffix);
					}
					reloadPref(p);
				}
			}
			setPreferenceScreen((PreferenceScreen) pref);
		}
	}

	static void reloadPref(final Preference pref) {
		Class iterClass = pref.getClass();
		while(iterClass != Object.class) {
			try {
				Method m = iterClass.getDeclaredMethod("onSetInitialValue", boolean.class, Object.class);
				m.setAccessible(true);
				m.invoke(pref, true, null);
			} catch (Exception e) { }
			iterClass = iterClass.getSuperclass();
		}
	}
}