package io.trygvis.soilmoisture;

import android.app.ActionBar;
import android.app.Activity;
import android.app.Fragment;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.ServiceConnection;
import android.os.Bundle;
import android.os.IBinder;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;

import io.trygvis.android.LocalBinder;
import io.trygvis.android.Optional;

import static io.trygvis.soilmoisture.SoilMoistureService.SoilMoistureListener;

public class SensorActivity extends Activity {
    private final static String TAG = SensorActivity.class.getSimpleName();

    public static final String EXTRA_ADDRESS = "address";
    public static final String EXTRA_NUMBER = "number";

    private final Context context = this;
    private String address;
    private int number;

    private ServiceConnection serviceConnection;
    private SoilMoistureService soilMoistureService;
    private SensorSoilMoistureListener serviceListener = new SensorSoilMoistureListener();
    private SmDevice device;
    private SmSensor sensor;

    @Override
    protected void onCreate(Bundle savedInstanceState) { Log.d(TAG, "onCreate");
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_sensor);

        address = getIntent().getStringExtra(EXTRA_ADDRESS);
        number = getIntent().getIntExtra(EXTRA_NUMBER, -1);

        if (savedInstanceState == null) {
            getFragmentManager().beginTransaction()
                    .add(R.id.container, new SensorFragment())
                    .commit();
        }

        ActionBar actionBar = getActionBar();

        if (actionBar != null) {
            actionBar.setTitle(number + ": " + address);
        }

        serviceConnection = new ServiceConnection() {
            @SuppressWarnings("unchecked")
            @Override
            public void onServiceConnected(ComponentName componentName, IBinder service) {
                Log.i(TAG, "onServiceConnected");
                soilMoistureService = ((LocalBinder<SoilMoistureService>) service).getService();
                registerReceiver(serviceListener, SoilMoistureListener.INTENT_FILTER);

                device = soilMoistureService.getDevice(address);
                Optional<SmSensor> o = device.getSensorByNumber(number);

                if (!o.isPresent()) {
                    Toast.makeText(context, "Could not find sensor #" + number + " on device " + address,
                            Toast.LENGTH_LONG).show();
                    finish();
                }
                sensor = o.get();

                // Schedule an updated reading of the relevant values.
                refreshSensorValues();

                runOnUiThread(SensorActivity.this::initializeView);
            }

            @Override
            public void onServiceDisconnected(ComponentName componentName) {
                Log.i(TAG, "onServiceDisconnected");
                soilMoistureService = null;
            }
        };

        bindService(new Intent(this, DefaultSoilMoistureService.class), serviceConnection, BIND_AUTO_CREATE);
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();

        if (serviceConnection != null) {
            sensor = null;
            device = null;
            unbindService(serviceConnection);
        }
    }

    @Override
    protected void onResume() {
        Log.i(TAG, "onResume");

        super.onResume();

        registerReceiver(serviceListener, SoilMoistureListener.INTENT_FILTER);
    }

    @Override
    protected void onPause() {
        Log.i(TAG, "onPause");

        super.onPause();
        unregisterReceiver(serviceListener);
    }

    private void refreshSensorValues() {
        if (sensor == null) {
            Log.d(TAG, "refreshSensorValues: not connected to service");
            return;
        }

        sensor.readCurrentValue();
        sensor.readWarningValue();
    }

    public void initializeView() {
        // current value, last updated
        // sync to cloud
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.menu_sensor, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }

    /**
     * A placeholder fragment containing a simple view.
     */
    public static class SensorFragment extends Fragment {
        private SensorActivity sensorActivity;
        private TextView currentValue;
        private TextView warningValue;

        @Override
        public void onAttach(Activity activity) {
            Log.i(TAG, "onAttach");
            super.onAttach(activity);

            sensorActivity = (SensorActivity) activity;
        }

        @Override
        public View onCreateView(LayoutInflater inflater, ViewGroup container,
                                 Bundle savedInstanceState) {
            View rootView = inflater.inflate(R.layout.fragment_sensor, container, false);

            currentValue = (TextView) rootView.findViewById(R.id.current_value);
            warningValue = (TextView) rootView.findViewById(R.id.warning_value);

            Button button = (Button) rootView.findViewById(R.id.button_refresh);

            button.setOnClickListener(v -> sensorActivity.refreshSensorValues());

            update();

            return rootView;
        }

        public void update() {
            SmSensor sensor = sensorActivity.sensor;

            if (sensor == null) {
                return;
            }

            Integer v = sensor.getLastValue();
            currentValue.setText(v != null ? v.toString() : "");

            Integer w = sensor.getWarningValue();
            warningValue.setText(w != null ? w.toString() : "");
        }
    }

    private class SensorSoilMoistureListener extends SoilMoistureListener {
        @Override
        public void onNewSample(String address, int sensor) {
            if(!address.equals(SensorActivity.this.address) || sensor != SensorActivity.this.number) {
                return;
            }

            SensorFragment sensorFragment = (SensorFragment) getFragmentManager().findFragmentById(R.id.container);
            sensorFragment.update();
        }

        @Override
        public void onDevicePropertyUpdated(String address) {
            Log.i(TAG, "onDevicePropertyUpdated");

            if (!address.equals(SensorActivity.this.address)) {
                return;
            }

            SensorFragment sensorFragment = (SensorFragment) getFragmentManager().findFragmentById(R.id.container);
            sensorFragment.update();
        }
    }
}