package nodomain.freeyourgadget.gadgetbridge.activities;

import android.app.Activity;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.SharedPreferences;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageManager;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.support.v4.app.NavUtils;
import android.support.v4.content.LocalBroadcastManager;
import android.view.LayoutInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.CheckBox;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.HashSet;
import java.util.List;

import nodomain.freeyourgadget.gadgetbridge.R;


public class AppBlacklistActivity extends Activity {
    private static final Logger LOG = LoggerFactory.getLogger(AppBlacklistActivity.class);

    private BroadcastReceiver mReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            String action = intent.getAction();
            if (action.equals(ControlCenter.ACTION_QUIT)) {
                finish();
            }
        }
    };

    private SharedPreferences sharedPrefs;

    private HashSet<String> blacklist = null;

    private void loadBlackList() {
        blacklist = (HashSet<String>) sharedPrefs.getStringSet("package_blacklist", null);
        if (blacklist == null) {
            blacklist = new HashSet<>();
        }
    }

    private void saveBlackList() {
        SharedPreferences.Editor editor = sharedPrefs.edit();
        if (blacklist.isEmpty()) {
            editor.putStringSet("package_blacklist", null);
        } else {
            editor.putStringSet("package_blacklist", blacklist);
        }
        editor.apply();
    }

    private synchronized void addToBlacklist(String packageName) {
        if (!blacklist.contains(packageName)) {
            blacklist.add(packageName);
            saveBlackList();
        }
    }

    private synchronized void removeFromBlacklist(String packageName) {
        blacklist.remove(packageName);
        saveBlackList();
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_appblacklist);
        getActionBar().setDisplayHomeAsUpEnabled(true);

        final PackageManager pm = getPackageManager();
        sharedPrefs = PreferenceManager.getDefaultSharedPreferences(getApplicationContext());

        loadBlackList();

        final List<ApplicationInfo> packageList = pm.getInstalledApplications(PackageManager.GET_META_DATA);
        ListView appListView = (ListView) findViewById(R.id.appListView);

        final ArrayAdapter<ApplicationInfo> adapter = new ArrayAdapter<ApplicationInfo>(this, R.layout.item_with_checkbox, packageList) {
            @Override
            public View getView(int position, View view, ViewGroup parent) {
                if (view == null) {
                    LayoutInflater inflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
                    view = inflater.inflate(R.layout.item_with_checkbox, parent, false);
                }

                ApplicationInfo appInfo = packageList.get(position);
                TextView deviceAppVersionAuthorLabel = (TextView) view.findViewById(R.id.item_details);
                TextView deviceAppNameLabel = (TextView) view.findViewById(R.id.item_name);
                ImageView deviceImageView = (ImageView) view.findViewById(R.id.item_image);
                CheckBox checkbox = (CheckBox) view.findViewById(R.id.item_checkbox);

                deviceAppVersionAuthorLabel.setText(appInfo.packageName);
                deviceAppNameLabel.setText(appInfo.loadLabel(pm));
                deviceImageView.setImageDrawable(appInfo.loadIcon(pm));

                if (blacklist.contains(appInfo.packageName)) {
                    checkbox.setChecked(true);
                }

                return view;
            }
        };
        appListView.setAdapter(adapter);

        appListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView parent, View v, int position, long id) {
                String packageName = packageList.get(position).packageName;
                CheckBox checkBox = ((CheckBox) v.findViewById(R.id.item_checkbox));
                checkBox.toggle();
                if (checkBox.isChecked()) {
                    addToBlacklist(packageName);
                } else {
                    removeFromBlacklist(packageName);
                }
            }
        });

        IntentFilter filter = new IntentFilter();
        filter.addAction(ControlCenter.ACTION_QUIT);

        LocalBroadcastManager.getInstance(this).registerReceiver(mReceiver, filter);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            case android.R.id.home:
                NavUtils.navigateUpFromSameTask(this);
                return true;
        }
        return super.onOptionsItemSelected(item);
    }

    @Override
    protected void onDestroy() {
        LocalBroadcastManager.getInstance(this).unregisterReceiver(mReceiver);
        super.onDestroy();
    }
}