/*
 * Copyright (C) 2009 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 com.android.camera.stress;

import com.android.camera.Camera;

import java.io.BufferedWriter;
import java.io.FileWriter;

import android.app.Instrumentation;
import android.test.ActivityInstrumentationTestCase2;
import android.test.suitebuilder.annotation.LargeTest;
import android.util.Log;
import android.view.KeyEvent;

/**
 * Junit / Instrumentation test case for camera test
 *
 */

public class CameraLatency extends ActivityInstrumentationTestCase2 <Camera> {
    private String TAG = "CameraLatency";
    private static final int TOTAL_NUMBER_OF_IMAGECAPTURE = 20;
    private static final long WAIT_FOR_IMAGE_CAPTURE_TO_BE_TAKEN = 3000;
    private static final String CAMERA_TEST_OUTPUT_FILE = "/sdcard/mediaStressOut.txt";

    private long mTotalAutoFocusTime;
    private long mTotalShutterLag;
    private long mTotalShutterToPictureDisplayedTime;
    private long mTotalPictureDisplayedToJpegCallbackTime;
    private long mTotalJpegCallbackToFirstFrameTime;
    private long mAvgAutoFocusTime;
    private long mAvgShutterLag = mTotalShutterLag;
    private long mAvgShutterToPictureDisplayedTime;
    private long mAvgPictureDisplayedToJpegCallbackTime;
    private long mAvgJpegCallbackToFirstFrameTime;

    public CameraLatency() {
        super("com.android.camera", Camera.class);
    }

    @Override
    protected void setUp() throws Exception {
        getActivity();
        super.setUp();
    }

    @Override
    protected void tearDown() throws Exception {
        super.tearDown();
    }

    @LargeTest
    public void testImageCapture() {
        Instrumentation inst = getInstrumentation();
        try {
            for (int i = 0; i < TOTAL_NUMBER_OF_IMAGECAPTURE; i++) {
                Thread.sleep(WAIT_FOR_IMAGE_CAPTURE_TO_BE_TAKEN);
                inst.sendKeyDownUpSync(KeyEvent.KEYCODE_DPAD_UP);
                inst.sendKeyDownUpSync(KeyEvent.KEYCODE_DPAD_CENTER);
                Thread.sleep(WAIT_FOR_IMAGE_CAPTURE_TO_BE_TAKEN);
                //skip the first measurement
                if (i != 0) {
                    Camera c = getActivity();
                    mTotalAutoFocusTime += c.mAutoFocusTime;
                    mTotalShutterLag += c.mShutterLag;
                    mTotalShutterToPictureDisplayedTime +=
                            c.mShutterToPictureDisplayedTime;
                    mTotalPictureDisplayedToJpegCallbackTime +=
                            c.mPictureDisplayedToJpegCallbackTime;
                    mTotalJpegCallbackToFirstFrameTime += c.mJpegCallbackToFirstFrameTime;
                }
            }
        } catch (Exception e) {
            Log.v(TAG, e.toString());
        }
        //ToDO: yslau
        //1) Need to get the baseline from the cupcake so that we can add the
        //failure condition of the camera latency.
        //2) Only count those number with succesful capture. Set the timer to invalid
        //before capture and ignore them if the value is invalid
        int numberofRun = TOTAL_NUMBER_OF_IMAGECAPTURE - 1;
        mAvgAutoFocusTime = mTotalAutoFocusTime / numberofRun;
        mAvgShutterLag = mTotalShutterLag / numberofRun;
        mAvgShutterToPictureDisplayedTime =
                mTotalShutterToPictureDisplayedTime / numberofRun;
        mAvgPictureDisplayedToJpegCallbackTime =
                mTotalPictureDisplayedToJpegCallbackTime / numberofRun;
        mAvgJpegCallbackToFirstFrameTime =
                mTotalJpegCallbackToFirstFrameTime / numberofRun;

        try {
            FileWriter fstream = null;
            fstream = new FileWriter(CAMERA_TEST_OUTPUT_FILE, true);
            BufferedWriter out = new BufferedWriter(fstream);
            out.write("Camera Latency : \n");
            out.write("Number of loop: " + TOTAL_NUMBER_OF_IMAGECAPTURE + "\n");
            out.write("Avg AutoFocus = " + mAvgAutoFocusTime + "\n");
            out.write("Avg mShutterLag = " + mAvgShutterLag + "\n");
            out.write("Avg mShutterToPictureDisplayedTime = "
                    + mAvgShutterToPictureDisplayedTime + "\n");
            out.write("Avg mPictureDisplayedToJpegCallbackTime = "
                    + mAvgPictureDisplayedToJpegCallbackTime + "\n");
            out.write("Avg mJpegCallbackToFirstFrameTime = " +
                    mAvgJpegCallbackToFirstFrameTime + "\n");
            out.close();
            fstream.close();
        } catch (Exception e) {
            fail("Camera Latency write output to file");
        }

        Log.v(TAG, "Avg AutoFocus = " + mAvgAutoFocusTime);
        Log.v(TAG, "Avg mShutterLag = " + mAvgShutterLag);
        Log.v(TAG, "Avg mShutterToPictureDisplayedTime = "
                + mAvgShutterToPictureDisplayedTime);
        Log.v(TAG, "Avg mPictureDisplayedToJpegCallbackTime = "
                + mAvgPictureDisplayedToJpegCallbackTime);
        Log.v(TAG, "Avg mJpegCallbackToFirstFrameTime = " + mAvgJpegCallbackToFirstFrameTime);
        assertTrue("testImageCapture", true);
    }
}