/*
 * Copyright (C) 2011 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.cts.tradefed.testtype;

import com.android.cts.tradefed.build.CtsBuildHelper;
import com.android.ddmlib.testrunner.ITestRunListener;
import com.android.tradefed.build.IBuildInfo;
import com.android.tradefed.device.DeviceNotAvailableException;
import com.android.tradefed.device.ITestDevice;
import com.android.tradefed.log.LogUtil.CLog;
import com.android.tradefed.result.ITestInvocationListener;
import com.android.tradefed.testtype.IAbi;
import com.android.tradefed.testtype.IBuildReceiver;
import com.android.tradefed.testtype.IDeviceTest;
import com.android.tradefed.testtype.IRemoteTest;

import java.io.File;
import java.util.ArrayList;
import java.util.List;

/**
 * Test runner for native gTests.
 *
 * TODO: This is similar to Tradefed's existing GTest, but it doesn't confirm
 *       each directory segment exists using ddmlib's file service. This was
 *       a problem since /data is not visible on a user build, but it is
 *       executable. It's also a lot more verbose when it comes to errors.
 */
public class GeeTest implements IBuildReceiver, IDeviceTest, IRemoteTest {

    private static final String NATIVE_TESTS_DIRECTORY = "/data/local/tmp/cts-native-tests";
    private static final String NATIVE_TESTS_DIRECTORY_TMP = "/data/local/tmp";
    private static final String ANDROID_PATH_SEPARATOR = "/";
    private static final String GTEST_FLAG_FILTER = "--gtest_filter=";

    private int mMaxTestTimeMs = 1 * 90 * 1000;

    private CtsBuildHelper mCtsBuild;
    private ITestDevice mDevice;
    private IAbi mAbi;
    private String mExeName;

    private final String mPackageName;

    private String mPositiveFilters = "";
    private String mNegativeFilters = "";

    public GeeTest(String packageName, String exeName) {
        mPackageName = packageName;
        mExeName = exeName;
    }

    public void setPositiveFilters(String positiveFilters) {
        mPositiveFilters = positiveFilters;
    }

    public void setNegativeFilters(String negativeFilters) {
        mNegativeFilters = negativeFilters;
    }

    protected String getGTestFilters() {
        // If both filters are empty or null return empty string.
        if (mPositiveFilters == null && mNegativeFilters == null) {
            return "";
        }
        if (mPositiveFilters.isEmpty() && mNegativeFilters.isEmpty()) {
            return "";
        }
        // Build filter string.
        StringBuilder sb = new StringBuilder();
        sb.append(GTEST_FLAG_FILTER);
        boolean hasPositiveFilters = false;
        if (mPositiveFilters != null && !mPositiveFilters.isEmpty()) {
            sb.append(mPositiveFilters);
            hasPositiveFilters = true;
        }
        if (mNegativeFilters != null && ! mNegativeFilters.isEmpty()) {
            if (hasPositiveFilters) {
                sb.append(":");
            }
            sb.append("-");
            sb.append(mNegativeFilters);
        }
        return sb.toString();
    }

    /**
     * @param abi The ABI to run the test on
     */
    public void setAbi(IAbi abi) {
        mAbi = abi;
        mExeName += mAbi.getBitness();
    }

    @Override
    public void run(ITestInvocationListener listener) throws DeviceNotAvailableException {
        if (installTest()) {
            runTest(listener);
        } else {
            CLog.e("Failed to install native tests");
        }
    }

    private boolean installTest() throws DeviceNotAvailableException {
        if (!createRemoteDir(NATIVE_TESTS_DIRECTORY)) {
            CLog.e("Could not create directory for native tests: " + NATIVE_TESTS_DIRECTORY);
            return false;
        }

        File nativeExe = new File(mCtsBuild.getTestCasesDir(), mExeName);
        if (!nativeExe.exists()) {
            CLog.e("Native test not found: " + nativeExe);
            return false;
        }

        String devicePath = NATIVE_TESTS_DIRECTORY + ANDROID_PATH_SEPARATOR + mExeName;
        if (!mDevice.pushFile(nativeExe, devicePath)) {
            CLog.e("Failed to push native test to device");
            return false;
        }
        return true;
    }

    private boolean createRemoteDir(String remoteFilePath) throws DeviceNotAvailableException {
        if (mDevice.doesFileExist(remoteFilePath)) {
            return true;
        }
        if (!(mDevice.doesFileExist(NATIVE_TESTS_DIRECTORY_TMP))) {
            CLog.e("Could not find the /data/local/tmp directory");
            return false;
        }

        mDevice.executeShellCommand(String.format("mkdir %s", remoteFilePath));
        return mDevice.doesFileExist(remoteFilePath);
    }

    void runTest(ITestRunListener listener) throws DeviceNotAvailableException {
        GeeTestResultParser resultParser = new GeeTestResultParser(mPackageName, listener);
        resultParser.setFakePackagePrefix(mPackageName + ".");

        String fullPath = NATIVE_TESTS_DIRECTORY + ANDROID_PATH_SEPARATOR + mExeName;
        String flags = getGTestFilters();
        CLog.v("Running gtest %s %s on %s", fullPath, flags, mDevice.getSerialNumber());
        // force file to be executable
        CLog.v("%s", mDevice.executeShellCommand(String.format("chmod 755 %s", fullPath)));

        try {
            mDevice.executeShellCommand(String.format("%s %s", fullPath, flags), resultParser,
                    mMaxTestTimeMs /* maxTimeToShellOutputResponse */,
                    0 /* retryAttempts */);
        } catch (DeviceNotAvailableException e) {
            resultParser.flush();
            throw e;
        } catch (RuntimeException e) {
            resultParser.flush();
            throw e;
        }
    }


    @Override
    public void setBuild(IBuildInfo buildInfo) {
        mCtsBuild = CtsBuildHelper.createBuildHelper(buildInfo);
    }

    @Override
    public void setDevice(ITestDevice device) {
        mDevice = device;
    }

    @Override
    public ITestDevice getDevice() {
        return mDevice;
    }
}