/*
 * 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.lemenzo.files;

import static android.content.ContentResolver.wrap;

import static com.google.common.truth.Truth.assertThat;

import static junit.framework.Assert.assertEquals;
import static junit.framework.Assert.assertFalse;
import static junit.framework.Assert.assertNotNull;
import static junit.framework.Assert.assertNull;
import static junit.framework.Assert.assertTrue;
import static junit.framework.Assert.fail;

import android.content.ContentProviderClient;
import android.content.ContentResolver;
import android.content.Context;
import android.database.ContentObserver;
import android.database.Cursor;
import android.media.ExifInterface;
import android.net.Uri;
import android.os.Bundle;
import android.os.ParcelFileDescriptor;
import android.os.RemoteException;
import android.provider.DocumentsContract;
import android.text.TextUtils;

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

import com.lemenzo.files.archives.ArchivesProvider;
import com.lemenzo.files.archives.ResourcesProvider;

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

import java.util.concurrent.CountDownLatch;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;

@RunWith(AndroidJUnit4.class)
@MediumTest
public class ArchivesProviderTest {

    private Context mContext;
    private ExecutorService mExecutor = null;

    @Before
    public void setUp() throws Exception {
        mContext = InstrumentationRegistry.getContext();
        mExecutor = Executors.newSingleThreadExecutor();
    }

    @After
    public void tearDown() throws Exception {
        mExecutor.shutdown();
        assertTrue(mExecutor.awaitTermination(3 /* timeout */, TimeUnit.SECONDS));
    }

    @Test
    public void testQueryRoots() throws RemoteException {
        final ContentResolver resolver = mContext.getContentResolver();
        final Uri rootsUri = DocumentsContract.buildRootsUri(ArchivesProvider.AUTHORITY);
        try (ContentProviderClient client = resolver.acquireUnstableContentProviderClient(
                rootsUri)) {
            assertNotNull(client);
            try (Cursor cursor = client.query(rootsUri, null, null, null, null, null)) {
                assertNotNull("Cursor must not be null.", cursor);
                assertEquals(0, cursor.getCount());
            }
        }
    }

    @Test
    public void testOpen_Success() throws InterruptedException {
        final Uri sourceUri = DocumentsContract.buildDocumentUri(
                ResourcesProvider.AUTHORITY, "archive.zip");
        final Uri archiveUri = ArchivesProvider.buildUriForArchive(sourceUri,
                ParcelFileDescriptor.MODE_READ_ONLY);

        final Uri childrenUri = DocumentsContract.buildChildDocumentsUri(
                ArchivesProvider.AUTHORITY, DocumentsContract.getDocumentId(archiveUri));

        final ContentResolver resolver = mContext.getContentResolver();
        final CountDownLatch latch = new CountDownLatch(1);

        try (ContentProviderClient client = resolver.acquireUnstableContentProviderClient(
                archiveUri)) {
            assertNotNull(client);
            ArchivesProvider.acquireArchive(client, archiveUri);
            try {
                try (Cursor cursor = resolver.query(childrenUri, null, null, null, null, null)) {
                    assertNotNull("Cursor must not be null. File not found?", cursor);
                    assertEquals(0, cursor.getCount());
                    final Bundle extras = cursor.getExtras();
                    assertTrue(extras.getBoolean(DocumentsContract.EXTRA_LOADING, false));
                    assertNull(extras.getString(DocumentsContract.EXTRA_ERROR));

                    final Uri notificationUri = cursor.getNotificationUri();
                    assertNotNull(notificationUri);

                    resolver.registerContentObserver(notificationUri, false,
                            new ContentObserver(null) {
                                @Override
                                public void onChange(boolean selfChange, Uri uri) {
                                    latch.countDown();
                                }
                            });
                }

                latch.await(3, TimeUnit.SECONDS);
                try (Cursor cursor = resolver.query(childrenUri, null, null, null, null, null)) {
                    assertNotNull("Cursor must not be null. File not found?", cursor);
                    assertEquals(3, cursor.getCount());
                    final Bundle extras = cursor.getExtras();
                    assertFalse(extras.getBoolean(DocumentsContract.EXTRA_LOADING, false));
                    assertNull(extras.getString(DocumentsContract.EXTRA_ERROR));
                }
            } finally {
                ArchivesProvider.releaseArchive(client, archiveUri);
            }
        }
    }

    @Test
    public void testOpen_Failure() throws InterruptedException {
        final Uri sourceUri = DocumentsContract.buildDocumentUri(
                ResourcesProvider.AUTHORITY, "broken.zip");
        final Uri archiveUri = ArchivesProvider.buildUriForArchive(sourceUri,
                ParcelFileDescriptor.MODE_READ_ONLY);

        final Uri childrenUri = DocumentsContract.buildChildDocumentsUri(
                ArchivesProvider.AUTHORITY, DocumentsContract.getDocumentId(archiveUri));

        final ContentResolver resolver = mContext.getContentResolver();
        final CountDownLatch latch = new CountDownLatch(1);

        try (ContentProviderClient client = resolver.acquireUnstableContentProviderClient(
                archiveUri)) {
            assertNotNull(client);
            ArchivesProvider.acquireArchive(client, archiveUri);
            try {
                try (Cursor cursor = resolver.query(childrenUri, null, null, null, null, null)) {
                    assertNotNull("Cursor must not be null. File not found?", cursor);
                    assertEquals(0, cursor.getCount());
                    final Bundle extras = cursor.getExtras();
                    assertTrue(extras.getBoolean(DocumentsContract.EXTRA_LOADING, false));
                    assertNull(extras.getString(DocumentsContract.EXTRA_ERROR));

                    final Uri notificationUri = cursor.getNotificationUri();
                    assertNotNull(notificationUri);

                    resolver.registerContentObserver(notificationUri, false,
                            new ContentObserver(null) {
                                @Override
                                public void onChange(boolean selfChange, Uri uri) {
                                    latch.countDown();
                                }
                            });
                }

                latch.await(3, TimeUnit.SECONDS);
                try (Cursor cursor = resolver.query(childrenUri, null, null, null, null, null)) {
                    assertNotNull("Cursor must not be null. File not found?", cursor);
                    assertEquals(0, cursor.getCount());
                    final Bundle extras = cursor.getExtras();
                    assertFalse(extras.getBoolean(DocumentsContract.EXTRA_LOADING, false));
                    assertFalse(TextUtils.isEmpty(extras.getString(DocumentsContract.EXTRA_ERROR)));
                }
            } finally {
                ArchivesProvider.releaseArchive(client, archiveUri);
            }
        }
    }

    @Test
    public void testOpen_ClosesOnRelease() {
        final Uri sourceUri = DocumentsContract.buildDocumentUri(
                ResourcesProvider.AUTHORITY, "archive.zip");
        final Uri archiveUri = ArchivesProvider.buildUriForArchive(sourceUri,
                ParcelFileDescriptor.MODE_READ_ONLY);

        final Uri childrenUri = DocumentsContract.buildChildDocumentsUri(
                ArchivesProvider.AUTHORITY, DocumentsContract.getDocumentId(archiveUri));

        final ContentResolver resolver = mContext.getContentResolver();

        try (ContentProviderClient client = resolver.acquireUnstableContentProviderClient(
                archiveUri)) {
            assertNotNull(client);

            // Acquire twice to ensure that the refcount works correctly.
            ArchivesProvider.acquireArchive(client, archiveUri);
            try {
                ArchivesProvider.acquireArchive(client, archiveUri);
                try (Cursor cursor = resolver.query(childrenUri, null, null, null, null, null)) {
                    assertNotNull("Cursor must not be null. File not found?", cursor);
                } finally {
                    ArchivesProvider.releaseArchive(client, archiveUri);
                }

                try (Cursor cursor = resolver.query(childrenUri, null, null, null, null, null)) {
                    assertNotNull("Cursor must not be null. File not found?", cursor);
                }
            } finally {
                ArchivesProvider.releaseArchive(client, archiveUri);
            }

            try (Cursor cursor = resolver.query(childrenUri, null, null, null, null, null)) {
                assertNotNull(cursor);
                fail("The archive was expected to be invalid on the last release call.");
            } catch (IllegalStateException e) {
                // Expected.
            }
        }
    }

    @Test
    public void testNoNotificationAfterAllReleased() throws InterruptedException, RemoteException {
        final Uri sourceUri = DocumentsContract.buildDocumentUri(
                ResourcesProvider.AUTHORITY, "archive.zip");
        final Uri archiveUri = ArchivesProvider.buildUriForArchive(sourceUri,
                ParcelFileDescriptor.MODE_READ_ONLY);

        final Uri childrenUri = DocumentsContract.buildChildDocumentsUri(
                ArchivesProvider.AUTHORITY, DocumentsContract.getDocumentId(archiveUri));

        final ContentResolver resolver = mContext.getContentResolver();

        try (ContentProviderClient client = resolver.acquireUnstableContentProviderClient(
                archiveUri)) {
            assertNotNull(client);
            final Uri notificationUri;
            ArchivesProvider.acquireArchive(client, archiveUri);
            try (Cursor cursor = client.query(childrenUri, null, null, null, null, null)) {
                assertNotNull(cursor);
                final Bundle extra = cursor.getExtras();
                assertTrue(extra.getBoolean(DocumentsContract.EXTRA_LOADING, false));
                notificationUri = cursor.getNotificationUri();
            } finally {
                ArchivesProvider.releaseArchive(client, archiveUri);
            }
            final CountDownLatch latch = new CountDownLatch(1);
            resolver.registerContentObserver(notificationUri, false, new ContentObserver(null) {
                @Override
                public void onChange(boolean selfChange, Uri uri) {
                    latch.countDown();
                }
            });

            // Assert that there is no notification if no one has acquired this archive and this
            // wait times out.
            assertFalse(latch.await(1, TimeUnit.SECONDS));
        }
    }

    private void getDocumentMetadata_byDocumentId_shouldMatchSize(String documentId)
            throws Exception {
        final Uri sourceUri = DocumentsContract.buildDocumentUri(
                ResourcesProvider.AUTHORITY, documentId);
        final Uri archiveUri = ArchivesProvider.buildUriForArchive(sourceUri,
                ParcelFileDescriptor.MODE_READ_ONLY);

        final ContentResolver resolver = mContext.getContentResolver();
        try (ContentProviderClient client = resolver.acquireUnstableContentProviderClient(
                archiveUri)) {
            assertNotNull(client);

            ArchivesProvider.acquireArchive(client, archiveUri);
            try {
                Uri archivedImageUri = Uri.parse(
                        "content://com.lemenzo.files.archives/document/content%3A%2F%2F"
                                + "com.lemenzo.files.archives.resourcesprovider%2F"
                                + "document%2F" + documentId + "%23268435456%23%2Ffreddy.jpg");

                Bundle metadata = DocumentsContract.getDocumentMetadata(wrap(client),
                        archivedImageUri);
                assertNotNull(metadata);
                Bundle exif = metadata.getBundle(DocumentsContract.METADATA_EXIF);
                assertNotNull(exif);

                assertThat(exif.getInt(ExifInterface.TAG_IMAGE_WIDTH)).isEqualTo(3036);
                assertThat(exif.getInt(ExifInterface.TAG_IMAGE_LENGTH)).isEqualTo(4048);
                assertThat(exif.getString(ExifInterface.TAG_MODEL)).isEqualTo("Pixel");
            } finally {
                ArchivesProvider.releaseArchive(client, archiveUri);
            }
        }
    }

    @Test
    public void testGetDocumentMetadata() throws Exception {
        getDocumentMetadata_byDocumentId_shouldMatchSize("images.zip");
    }

    @Test
    public void getDocumentMetadata_sevenZFile_shouldMatchSize() throws Exception {
        getDocumentMetadata_byDocumentId_shouldMatchSize("images.7z");
    }

    @Test
    public void getDocumentMetadata_tgz_shouldMatchSize() throws Exception {
        getDocumentMetadata_byDocumentId_shouldMatchSize("images.tgz");
    }

    @Test
    public void getDocumentMetadata_tar_shouldMatchSize() throws Exception {
        getDocumentMetadata_byDocumentId_shouldMatchSize("images.tar");
    }
}