package com.app.rollertest;

import android.app.Activity;
import android.app.PendingIntent;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;

import android.os.Bundle;
import android.os.ParcelFileDescriptor;

import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;

import com.android.future.usb.UsbAccessory;
import com.android.future.usb.UsbManager;



import java.io.FileDescriptor;

import java.io.FileOutputStream;
import java.io.IOException;

public class RollerTestActivity extends Activity {

    private UsbManager mUsbManager;
    private UsbAccessory mAccessory;

    private FileOutputStream mOutputStream;
    private ParcelFileDescriptor mFileDescriptor;

    private PendingIntent mPermissionIntent;
    private boolean mPermissionRequestPending;


    TextView C7;
    TextView C6;
    TextView C5;
    TextView C4;
    TextView C3;
    TextView C2;
    TextView C1;

    Button B;
    OnClickListener BL = new OnClickListener() {

            public void onClick(View v) {

                System.out.format( String.valueOf("click%n") );

                C7.setText("click.");
                sendCommand((byte)2, (byte)0, (byte)255);
            }
    };

    private static final String ACTION_USB_PERMISSION = "com.app.rollertest.action.USB_PERMISSION";

    private final BroadcastReceiver mUsbReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            String action = intent.getAction();
            if (ACTION_USB_PERMISSION.equals(action)) {
                synchronized (this) {
                    UsbAccessory accessory = UsbManager.getAccessory(intent);
                    if (intent.getBooleanExtra(
                            UsbManager.EXTRA_PERMISSION_GRANTED, false)) {
                        openAccessory(accessory);
                    } else {
                        C2.setText("openAccessory positive");
                    }
                    mPermissionRequestPending = false;
                }
            } else if (UsbManager.ACTION_USB_ACCESSORY_DETACHED.equals(action)) {
                UsbAccessory accessory = UsbManager.getAccessory(intent);
                if (accessory != null && accessory.equals(mAccessory)) {
                    closeAccessory();
                }
            }
        }
    };

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);


        C1 = (TextView)findViewById(R.id.C1);
        C2 = (TextView)findViewById(R.id.C2);
        C3 = (TextView)findViewById(R.id.C3);
        C4 = (TextView)findViewById(R.id.C4);
        C5 = (TextView)findViewById(R.id.C5);
        C6 = (TextView)findViewById(R.id.C6);
        C7 = (TextView)findViewById(R.id.C7);

        B = (Button)findViewById(R.id.button1);
        B.setOnClickListener(BL);


        mUsbManager = UsbManager.getInstance(this);
        mPermissionIntent = PendingIntent.getBroadcast(this, 0, new Intent(
                ACTION_USB_PERMISSION), 0);
        IntentFilter filter = new IntentFilter(ACTION_USB_PERMISSION);
        filter.addAction(UsbManager.ACTION_USB_ACCESSORY_DETACHED);
        registerReceiver(mUsbReceiver, filter);

        if (getLastNonConfigurationInstance() != null) {

            mAccessory = (UsbAccessory) getLastNonConfigurationInstance();
            openAccessory(mAccessory);

        } else {

            C1.setText("getLastNonConfigurationInstance else");
        }


    }

    private void openAccessory(UsbAccessory accessory) {
        mFileDescriptor = mUsbManager.openAccessory(accessory);
        if (mFileDescriptor != null) {

            C2.setText("openAccessory positive");

            mAccessory = accessory;
            FileDescriptor fd = mFileDescriptor.getFileDescriptor();

            mOutputStream = new FileOutputStream(fd);

        } else {
            C2.setText("openAccessory else");
        }
    }


    private void closeAccessory() {

        try {
            if (mFileDescriptor != null) {
                mFileDescriptor.close();
            }
        } catch (IOException e) {
        } finally {
            mFileDescriptor = null;
            mAccessory = null;
        }
    }


    public void sendCommand(byte command, byte target, int value) {
        byte[] buffer = new byte[3];
        if (value > 255)
            value = 255;

        buffer[0] = command;
        buffer[1] = target;
        buffer[2] = (byte) value;
        if (mOutputStream != null && buffer[1] != -1) {
            try {
                mOutputStream.write(buffer);
            } catch (IOException e) {

                C3.setText("SC: exeption");

            }
        } else {

            C3.setText("SC: else");
        }
    }








}