package com.test.testlayout;

import java.nio.charset.Charset;
import java.util.Arrays;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.nfc.NdefMessage;
import android.nfc.NdefRecord;
import android.nfc.NfcAdapter;
import android.nfc.Tag;
import android.nfc.tech.NfcF;
import android.os.Bundle;
import android.os.Parcelable;
import android.util.Log;
import com.google.common.collect.BiMap;
import com.google.common.collect.ImmutableBiMap;
import com.google.common.primitives.Bytes;

import android.content.Intent;
import com.unity3d.player.UnityPlayerActivity;

public class MainActivity extends UnityPlayerActivity {

    public static final String MIME_TEXT_PLAIN = "text/plain";

    private static final BiMap URI_PREFIX_MAP = ImmutableBiMap.builder()
            .put((byte) 0x00, "")
            .put((byte) 0x01, "http://www.")
            .put((byte) 0x02, "https://www.")
            .put((byte) 0x03, "http://")
            .put((byte) 0x04, "https://")
            .put((byte) 0x05, "tel:")
            .put((byte) 0x06, "mailto:")
            .put((byte) 0x07, "ftp://anonymous:anonymous@")
            .put((byte) 0x08, "ftp://ftp.")
            .put((byte) 0x09, "ftps://")
            .put((byte) 0x0A, "sftp://")
            .put((byte) 0x0B, "smb://")
            .put((byte) 0x0C, "nfs://")
            .put((byte) 0x0D, "ftp://")
            .put((byte) 0x0E, "dav://")
            .put((byte) 0x0F, "news:")
            .put((byte) 0x10, "telnet://")
            .put((byte) 0x11, "imap:")
            .put((byte) 0x12, "rtsp://")
            .put((byte) 0x13, "urn:")
            .put((byte) 0x14, "pop:")
            .put((byte) 0x15, "sip:")
            .put((byte) 0x16, "sips:")
            .put((byte) 0x17, "tftp:")
            .put((byte) 0x18, "btspp://")
            .put((byte) 0x19, "btl2cap://")
            .put((byte) 0x1A, "btgoep://")
            .put((byte) 0x1B, "tcpobex://")
            .put((byte) 0x1C, "irdaobex://")
            .put((byte) 0x1D, "file://")
            .put((byte) 0x1E, "urn:epc:id:")
            .put((byte) 0x1F, "urn:epc:tag:")
            .put((byte) 0x20, "urn:epc:pat:")
            .put((byte) 0x21, "urn:epc:raw:")
            .put((byte) 0x22, "urn:epc:")
            .put((byte) 0x23, "urn:nfc:").build();

    private NfcAdapter mNfcAdapter;

    private PendingIntent pendingIntent;

    IntentFilter[] mIntentFilter;

    String[][] techListsArray;

    private static String value = "";
    public static MainActivity instance;
    public static Context ctx;


    public static MainActivity instance() {
        return new MainActivity();
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        MainActivity.instance = this;
        ctx = this;
        // Foreground Dispatch: 1. Creates a PendingIntent object so the Android system can populate it with the details of the tag when it is scanned.
        pendingIntent = PendingIntent.getActivity(MainActivity.this, 0,
                new Intent(MainActivity.this, getClass()).addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP), 0);
        // Foreground Dispatch: 2. Declare intent filters to handle the intents that you want to intercept
        mIntentFilter = new IntentFilter[]{new IntentFilter(NfcAdapter.ACTION_TAG_DISCOVERED)};
        // Foreground Dispatch: 3. Set up an array of tag technologies that your application wants to handle.
        techListsArray = new String[][]{new String[]{NfcF.class.getName()}};

        mNfcAdapter = NfcAdapter.getDefaultAdapter(this);
        if (mNfcAdapter == null) {
            Log.e(MainActivity.class.toString(), "This device doesn't support NFC.");
            finish();
            return;
        }
        if (!mNfcAdapter.isEnabled()) {
            Log.e(MainActivity.class.toString(), "NFC is disabled.");
        } else {
            Log.i(MainActivity.class.toString(), "NFC reader initialized.");
        }
    }

    @Override
    public void onResume() {
        super.onResume();
        // Enables the foreground dispatch when the activity regains focus.
        mNfcAdapter.enableForegroundDispatch(this, pendingIntent, mIntentFilter, techListsArray);
    }

    @Override
    public void onPause() {
        super.onPause();
        // Disables the foreground dispatch when the activity loses focus.
        mNfcAdapter.disableForegroundDispatch(this);
    }

    @Override
    protected void onNewIntent(Intent intent) {
        super.onNewIntent(intent);
        handleIntent(intent);
    }

    private void handleIntent(Intent intent) {
        Tag tag = intent.getParcelableExtra(NfcAdapter.EXTRA_TAG);
        if (tag != null) {
            // Parses through all NDEF messages and their records and picks text and uri type.
            Parcelable[] data = intent.getParcelableArrayExtra(NfcAdapter.EXTRA_NDEF_MESSAGES);
            String s = "";
            if (data != null) {
                try {
                    for (int i = 0; i < data.length; i++) {
                        NdefRecord[] recs = ((NdefMessage) data[i]).getRecords();
                        for (int j = 0; j < recs.length; j++) {
                            if (recs[j].getTnf() == NdefRecord.TNF_WELL_KNOWN
                                    && Arrays.equals(recs[j].getType(), NdefRecord.RTD_TEXT)) {
                                /*
                                * See NFC forum specification for
                                * "Text Record Type Definition" at 3.2.1
                                *
                                * http://www.nfc-forum.org/specs/
                                *
                                * bit_7 defines encoding bit_6 reserved for
                                * future use, must be 0 bit_5..0 length of IANA
                                * language code
                                */
                                byte[] payload = recs[j].getPayload();
                                String textEncoding = ((payload[0] & 0200) == 0) ? "UTF-8" : "UTF-16";
                                int langCodeLen = payload[0] & 0077;
                                s += new String(payload, langCodeLen + 1, payload.length - langCodeLen - 1,
                                        textEncoding);
                            } else if (recs[j].getTnf() == NdefRecord.TNF_WELL_KNOWN
                                    && Arrays.equals(recs[j].getType(), NdefRecord.RTD_URI)) {
                                /*
                                * See NFC forum specification for
                                * "URI Record Type Definition" at 3.2.2
                                *
                                * http://www.nfc-forum.org/specs/
                                *
                                * payload[0] contains the URI Identifier Code
                                * payload[1]...payload[payload.length - 1]
                                * contains the rest of the URI.
                                */
                                byte[] payload = recs[j].getPayload();
                                String prefix = (String) URI_PREFIX_MAP.get(payload[0]);
                                byte[] fullUri = Bytes.concat(prefix.getBytes(Charset.forName("UTF-8")),
                                        Arrays.copyOfRange(payload, 1, payload.length));
                                s += new String(fullUri, Charset.forName("UTF-8"));
                            }
                        }
                    }
                } catch (Exception e) {
                    value = e.getMessage();
                    Log.e(MainActivity.class.toString(), e.getMessage());
                }
            }
            Log.i(MainActivity.class.toString(), s);
            value = s;
        }
    }

    public static String getValue() {
        return value;
    }

}