/*
 * Copyright (C) 2018 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package android.telephony.utility;

import android.app.Instrumentation;
import android.content.Context;
import android.device.collectors.util.SendToInstrumentation;
import android.os.Bundle;
import android.se.omapi.Reader;
import android.se.omapi.SEService;
import android.se.omapi.SEService.OnConnectedListener;
import android.telephony.TelephonyManager;

import java.util.Timer;
import java.util.TimerTask;
import java.util.concurrent.Executor;

import androidx.test.InstrumentationRegistry;
import androidx.test.runner.AndroidJUnit4;

import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;

import static org.junit.Assert.assertNotNull;

/**
 * Instrumentation test that allows to get some telephony states.
 * <p>If TelephonyManager does not exists or is not supported, a test failure will be reported
 */
@RunWith(AndroidJUnit4.class)
public class SimCardUtil {

    private static final String SIM_STATE = "sim_state";
    private static final String CARRIER_PRIVILEGES = "has_carried_privileges";
    private static final String SECURED_ELEMENT = "has_secured_element";
    private static final String SE_SERVICE = "has_se_service";

    private static final long SERVICE_CONNECTION_TIME_OUT = 3000;

    private SEService mSeService;
    private Object mServiceMutex = new Object();
    private Timer mConnectionTimer;
    private ServiceConnectionTimerTask mTimerTask = new ServiceConnectionTimerTask();
    private boolean mConnected = false;
    private final OnConnectedListener mListener = new OnConnectedListener() {
                @Override
                public void onConnected() {
                    synchronized (mServiceMutex) {
                        mConnected = true;
                        mServiceMutex.notify();
                    }
                }
            };

    @Before
    public void setUp() throws Exception {
        mSeService = new SEService(InstrumentationRegistry.getContext(), new SynchronousExecutor(), mListener);
        mConnectionTimer = new Timer();
        mConnectionTimer.schedule(mTimerTask, SERVICE_CONNECTION_TIME_OUT);
    }

    @Test
    public void getSimCardInformation() throws Exception {
        // Context of the app under test.
        Context context = InstrumentationRegistry.getTargetContext();
        Instrumentation instrumentation = InstrumentationRegistry.getInstrumentation();

        TelephonyManager tm = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
        assertNotNull(tm);

        Bundle returnBundle = new Bundle();
        // Sim card - SIM_STATE_READY 5
        int state = tm.getSimState();
        returnBundle.putInt(SIM_STATE, state);

        // UICC check
        boolean carrierPrivileges = tm.hasCarrierPrivileges();
        returnBundle.putBoolean(CARRIER_PRIVILEGES, carrierPrivileges);

        // Secured element check
        if (waitForConnection()) {
            Reader[] readers = mSeService.getReaders();
            for (Reader reader : readers) {
                returnBundle.putBoolean(SECURED_ELEMENT, reader.isSecureElementPresent());
                returnBundle.putBoolean(SE_SERVICE, reader.getSEService() != null ? true : false);
            }
        } else {
            returnBundle.putBoolean(SECURED_ELEMENT, false);
            returnBundle.putBoolean(SE_SERVICE, false);
        }
        SendToInstrumentation.sendBundle(instrumentation, returnBundle);
    }

    @After
    public void tearDown() throws Exception {
        if (mSeService != null && mSeService.isConnected()) {
            mSeService.shutdown();
            mConnected = false;
        }
    }

    private boolean waitForConnection() {
        synchronized (mServiceMutex) {
            if (!mConnected) {
                try {
                    mServiceMutex.wait();
                } catch (InterruptedException e) {
                    return false;
                }
            }
            if (!mConnected) {
                return false;
            }
            if (mConnectionTimer != null) {
                mConnectionTimer.cancel();
            }
            return true;
        }
    }

    private class SynchronousExecutor implements Executor {
        @Override
        public void execute(Runnable r) {
            r.run();
        }
    }

    private class ServiceConnectionTimerTask extends TimerTask {
        @Override
        public void run() {
            synchronized (mServiceMutex) {
                mServiceMutex.notifyAll();
            }
        }
    }
}