/**
 * ownCloud Android client application
 * <p/>
 * Copyright (C) 2015 ownCloud Inc.
 * <p/>
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2,
 * as published by the Free Software Foundation.
 * <p/>
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * <p/>
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package com.owncloud.android.uiautomator;

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

import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.support.test.InstrumentationRegistry;
import android.support.test.filters.SdkSuppress;
import android.support.test.runner.AndroidJUnit4;
import android.support.test.uiautomator.By;
import android.support.test.uiautomator.UiDevice;
import android.support.test.uiautomator.UiObject;
import android.support.test.uiautomator.UiObjectNotFoundException;
import android.support.test.uiautomator.UiSelector;
import android.support.test.uiautomator.Until;


import static org.hamcrest.CoreMatchers.notNullValue;
import static org.junit.Assert.assertThat;

/**
 * UI Automator tests
 */
@RunWith(AndroidJUnit4.class)
@SdkSuppress(minSdkVersion = 18)
public class InitialTest {

    private static final String OWNCLOUD_APP_PACKAGE = "com.owncloud.android";
    private static final String ANDROID_SETTINGS_PACKAGE = "com.android.settings";
    private static final String SETTINGS_DATA_USAGE_OPTION = "Data usage";

    private static final int LAUNCH_TIMEOUT = 5000;

    private UiDevice mDevice;

    @Before
    public void initializeDevice() {
        // Initialize UiDevice instance
        mDevice = UiDevice.getInstance(InstrumentationRegistry.getInstrumentation());
    }

    @Test
    public void checkPreconditions() {
        assertThat(mDevice, notNullValue());
    }

    /**
     * Start owncloud app
     */
    @Test
    public void startAppFromHomeScreen() {
        // Perform a short press on the HOME button
        mDevice.pressHome();

        // Wait for launcher
        final String launcherPackage = getLauncherPackageName();
        assertThat(launcherPackage, notNullValue());
        mDevice.wait(Until.hasObject(By.pkg(launcherPackage).depth(0)), LAUNCH_TIMEOUT);

        // Launch the app
        Context context = InstrumentationRegistry.getContext();
        final Intent intent = context.getPackageManager()
                .getLaunchIntentForPackage(OWNCLOUD_APP_PACKAGE);
        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK);
        context.startActivity(intent);

        // Wait for the app to appear
        mDevice.wait(Until.hasObject(By.pkg(OWNCLOUD_APP_PACKAGE).depth(0)), LAUNCH_TIMEOUT);
    }

    /**
     * Start Settings app
     *
     * @throws UiObjectNotFoundException
     */
    @Test
    public void startSettingsFromHomeScreen() throws UiObjectNotFoundException {

        mDevice.pressHome();

        // Wait for launcher
        final String launcherPackage = getLauncherPackageName();
        assertThat(launcherPackage, notNullValue());
        mDevice.wait(Until.hasObject(By.pkg(launcherPackage).depth(0)), LAUNCH_TIMEOUT);

        // Launch the app
        Context context = InstrumentationRegistry.getContext();
        final Intent intent = context.getPackageManager()
                .getLaunchIntentForPackage(ANDROID_SETTINGS_PACKAGE);
        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK);
        context.startActivity(intent);

        clickByText(SETTINGS_DATA_USAGE_OPTION);
    }

    /**
     * Uses package manager to find the package name of the device launcher. Usually this package
     * is "com.android.launcher" but can be different at times. This is a generic solution which
     * works on all platforms.`
     */
    private String getLauncherPackageName() {
        // Create launcher Intent
        final Intent intent = new Intent(Intent.ACTION_MAIN);
        intent.addCategory(Intent.CATEGORY_HOME);

        // Use PackageManager to get the launcher package name
        PackageManager pm = InstrumentationRegistry.getContext().getPackageManager();
        ResolveInfo resolveInfo = pm.resolveActivity(intent, PackageManager.MATCH_DEFAULT_ONLY);
        return resolveInfo.activityInfo.packageName;
    }

    /**
     * Helper to click on objects that match the content-description text.
     *
     * @param description the description
     * @throws UiObjectNotFoundException
     */
    private void clickByDescription(String description) throws UiObjectNotFoundException {
        UiDevice device = UiDevice.getInstance(InstrumentationRegistry.getInstrumentation());
        UiObject obj = device.findObject(new UiSelector().description(description));
        obj.clickAndWaitForNewWindow();
    }

    /**
     * Helper to click on object that match the text value.
     *
     * @param text the text
     * @throws UiObjectNotFoundException
     */
    private void clickByText(String text) throws UiObjectNotFoundException {
        UiDevice device = UiDevice.getInstance(InstrumentationRegistry.getInstrumentation());
        UiObject obj = device.findObject(new UiSelector().text(text));
        obj.clickAndWaitForNewWindow();
    }
}