/*
 * Copyright (C) 2016 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.documentsui;

import static com.android.documentsui.StubProvider.DEFAULT_AUTHORITY;
import static com.android.documentsui.StubProvider.ROOT_0_ID;
import static com.android.documentsui.StubProvider.ROOT_1_ID;

import android.annotation.Nullable;
import android.app.Activity;
import android.content.ContentProviderClient;
import android.content.ContentResolver;
import android.content.Context;
import android.content.Intent;
import android.os.RemoteException;
import android.provider.DocumentsContract.Document;
import android.support.test.uiautomator.Configurator;
import android.support.test.uiautomator.UiDevice;
import android.support.test.uiautomator.UiObjectNotFoundException;
import android.test.ActivityInstrumentationTestCase2;
import android.view.MotionEvent;

import com.android.documentsui.bots.DirectoryListBot;
import com.android.documentsui.bots.KeyboardBot;
import com.android.documentsui.bots.RootsListBot;
import com.android.documentsui.bots.UiBot;
import com.android.documentsui.model.RootInfo;

/**
 * Provides basic test environment for UI tests:
 * - Launches activity
 * - Creates and gives access to test root directories and test files
 * - Cleans up the test environment
 */
public abstract class ActivityTest<T extends Activity> extends ActivityInstrumentationTestCase2<T> {

    static final int TIMEOUT = 5000;

    // Testing files. For custom ones, override initTestFiles().
    public static final String dirName1 = "Dir1";
    public static final String fileName1 = "file1.log";
    public static final String fileName2 = "file12.png";
    public static final String fileName3 = "anotherFile0.log";
    public static final String fileName4 = "poodles.text";
    public static final String fileNameNoRename = "NO_RENAMEfile.txt";

    public Bots bots;
    public UiDevice device;
    public Context context;

    public RootInfo rootDir0;
    public RootInfo rootDir1;

    ContentResolver mResolver;
    DocumentsProviderHelper mDocsHelper;
    ContentProviderClient mClient;

    public ActivityTest(Class<T> activityClass) {
        super(activityClass);
    }

    /*
     * Returns the root that will be opened within the activity.
     * By default tests are started with one of the test roots.
     * Override the method if you want to open different root on start.
     * @return Root that will be opened. Return null if you want to open activity's default root.
     */
    @Nullable
    protected RootInfo getInitialRoot() {
        return rootDir0;
    }

    @Override
    public void setUp() throws Exception {
        device = UiDevice.getInstance(getInstrumentation());
        // NOTE: Must be the "target" context, else security checks in content provider will fail.
        context = getInstrumentation().getTargetContext();

        bots = new Bots(device, context, TIMEOUT);

        Configurator.getInstance().setToolType(MotionEvent.TOOL_TYPE_MOUSE);
        bots.main.revealLauncher();

        mResolver = context.getContentResolver();
        mClient = mResolver.acquireUnstableContentProviderClient(DEFAULT_AUTHORITY);
        mDocsHelper = new DocumentsProviderHelper(DEFAULT_AUTHORITY, mClient);

        rootDir0 = mDocsHelper.getRoot(ROOT_0_ID);
        rootDir1 = mDocsHelper.getRoot(ROOT_1_ID);

        launchActivity();

        bots.main.revealApp();
        resetStorage();
    }

    @Override
    public void tearDown() throws Exception {
        mClient.release();
        super.tearDown();
    }

    void launchActivity() {
        final Intent intent = context.getPackageManager().getLaunchIntentForPackage(
                UiBot.TARGET_PKG);
        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK | Intent.FLAG_ACTIVITY_NEW_TASK);
        if (getInitialRoot() != null) {
            intent.setData(getInitialRoot().getUri());
        }
        setActivityIntent(intent);
        getActivity();  // Launch the activity.
    }

    void resetStorage() throws RemoteException {
        mClient.call("clear", null, null);
        device.waitForIdle();
    }

    void initTestFiles() throws RemoteException {
        mDocsHelper.createFolder(rootDir0, dirName1);
        mDocsHelper.createDocument(rootDir0, "text/plain", fileName1);
        mDocsHelper.createDocument(rootDir0, "image/png", fileName2);
        mDocsHelper.createDocumentWithFlags(rootDir0.documentId, "text/plain", fileNameNoRename,
                Document.FLAG_SUPPORTS_WRITE);

        mDocsHelper.createDocument(rootDir1, "text/plain", fileName3);
        mDocsHelper.createDocument(rootDir1, "text/plain", fileName4);
    }

    void assertDefaultContentOfTestDir0() throws UiObjectNotFoundException {
        bots.directory.assertDocumentsCount(4);
        bots.directory.assertDocumentsPresent(fileName1, fileName2, dirName1, fileNameNoRename);
    }

    void assertDefaultContentOfTestDir1() throws UiObjectNotFoundException {
        bots.directory.assertDocumentsCount(2);
        bots.directory.assertDocumentsPresent(fileName3, fileName4);
    }

    /**
     * Handy collection of bots for working with Files app.
     */
    public static final class Bots {
        public final UiBot main;
        public final RootsListBot roots;
        public final DirectoryListBot directory;
        public final KeyboardBot keyboard;

        private Bots(UiDevice device, Context context, int timeout) {
            this.main = new UiBot(device, context, TIMEOUT);
            this.roots = new RootsListBot(device, context, TIMEOUT);
            this.directory = new DirectoryListBot(device, context, TIMEOUT);
            this.keyboard = new KeyboardBot(device, context, TIMEOUT);
        }
    }
}