/*
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */

package com.facebook.react.modules.fresco;

import android.content.Context;
import androidx.annotation.Nullable;
import com.facebook.common.logging.FLog;
import com.facebook.drawee.backends.pipeline.Fresco;
import com.facebook.imagepipeline.backends.okhttp3.OkHttpImagePipelineConfigFactory;
import com.facebook.imagepipeline.core.ImagePipelineConfig;
import com.facebook.imagepipeline.listener.RequestListener;
import com.facebook.react.bridge.LifecycleEventListener;
import com.facebook.react.bridge.ReactApplicationContext;
import com.facebook.react.bridge.ReactContext;
import com.facebook.react.bridge.ReactContextBaseJavaModule;
import com.facebook.react.common.ReactConstants;
import com.facebook.react.module.annotations.ReactModule;
import com.facebook.react.modules.common.ModuleDataCleaner;
import com.facebook.react.modules.network.CookieJarContainer;
import com.facebook.react.modules.network.ForwardingCookieHandler;
import com.facebook.react.modules.network.OkHttpClientProvider;
import com.facebook.react.turbomodule.core.interfaces.TurboModule;
import java.util.HashSet;
import okhttp3.JavaNetCookieJar;
import okhttp3.OkHttpClient;

/**
 * Module to initialize the Fresco library.
 *
 * <p>Does not expose any methods to JavaScript code. For initialization and cleanup only.
 */
@ReactModule(name = FrescoModule.NAME, needsEagerInit = true)
public class FrescoModule extends ReactContextBaseJavaModule
    implements ModuleDataCleaner.Cleanable, LifecycleEventListener, TurboModule {

  public static final String NAME = "FrescoModule";
  private final boolean mClearOnDestroy;
  private @Nullable ImagePipelineConfig mConfig;

  private static boolean sHasBeenInitialized = false;

  /**
   * Create a new Fresco module with a default configuration (or the previously given configuration
   * via {@link #FrescoModule(ReactApplicationContext, boolean, ImagePipelineConfig)}.
   *
   * @param reactContext the context to use
   */
  public FrescoModule(ReactApplicationContext reactContext) {
    this(reactContext, true, null);
  }

  /**
   * Create a new Fresco module with a default configuration (or the previously given configuration
   * via {@link #FrescoModule(ReactApplicationContext, boolean, ImagePipelineConfig)}.
   *
   * @param clearOnDestroy whether to clear the memory cache in onHostDestroy: this should be {@code
   *     true} for pure RN apps and {@code false} for apps that use Fresco outside of RN as well
   * @param reactContext the context to use
   */
  public FrescoModule(ReactApplicationContext reactContext, boolean clearOnDestroy) {
    this(reactContext, clearOnDestroy, null);
  }

  /**
   * Create a new Fresco module with a given ImagePipelineConfig. This should only be called when
   * the module has not been initialized yet. You can use {@link #hasBeenInitialized()} to check
   * this and call {@link #FrescoModule(ReactApplicationContext)} if it is already initialized.
   * Otherwise, the given Fresco configuration will be ignored.
   *
   * @param reactContext the context to use
   * @param clearOnDestroy whether to clear the memory cache in onHostDestroy: this should be {@code
   *     true} for pure RN apps and {@code false} for apps that use Fresco outside of RN as well
   * @param config the Fresco configuration, which will only be used for the first initialization
   */
  public FrescoModule(
      ReactApplicationContext reactContext,
      boolean clearOnDestroy,
      @Nullable ImagePipelineConfig config) {
    super(reactContext);
    mClearOnDestroy = clearOnDestroy;
    mConfig = config;
  }

  @Override
  public void initialize() {
    super.initialize();
    getReactApplicationContext().addLifecycleEventListener(this);
    if (!hasBeenInitialized()) {
      if (mConfig == null) {
        mConfig = getDefaultConfig(getReactApplicationContext());
      }
      Context context = getReactApplicationContext().getApplicationContext();
      Fresco.initialize(context, mConfig);
      sHasBeenInitialized = true;
    } else if (mConfig != null) {
      FLog.w(
          ReactConstants.TAG,
          "Fresco has already been initialized with a different config. "
              + "The new Fresco configuration will be ignored!");
    }
    mConfig = null;
  }

  @Override
  public String getName() {
    return NAME;
  }

  @Override
  public void clearSensitiveData() {
    // Clear image cache.
    Fresco.getImagePipeline().clearCaches();
  }

  /**
   * Check whether the FrescoModule has already been initialized. If this is the case, Calls to
   * {@link #FrescoModule(ReactApplicationContext, ImagePipelineConfig)} will ignore the given
   * configuration.
   *
   * @return true if this module has already been initialized
   */
  public static boolean hasBeenInitialized() {
    return sHasBeenInitialized;
  }

  private static ImagePipelineConfig getDefaultConfig(ReactContext context) {
    return getDefaultConfigBuilder(context).build();
  }

  /**
   * Get the default Fresco configuration builder. Allows adding of configuration options in
   * addition to the default values.
   *
   * @return {@link ImagePipelineConfig.Builder} that has been initialized with default values
   */
  public static ImagePipelineConfig.Builder getDefaultConfigBuilder(ReactContext context) {
    HashSet<RequestListener> requestListeners = new HashSet<>();
    requestListeners.add(new SystraceRequestListener());

    OkHttpClient client = OkHttpClientProvider.createClient();

    // make sure to forward cookies for any requests via the okHttpClient
    // so that image requests to endpoints that use cookies still work
    CookieJarContainer container = (CookieJarContainer) client.cookieJar();
    ForwardingCookieHandler handler = new ForwardingCookieHandler(context);
    container.setCookieJar(new JavaNetCookieJar(handler));

    return OkHttpImagePipelineConfigFactory.newBuilder(context.getApplicationContext(), client)
        .setNetworkFetcher(new ReactOkHttpNetworkFetcher(client))
        .setDownsampleEnabled(false)
        .setRequestListeners(requestListeners);
  }

  @Override
  public void onHostResume() {}

  @Override
  public void onHostPause() {}

  @Override
  public void onHostDestroy() {
    // According to the javadoc for LifecycleEventListener#onHostDestroy, this is only called when
    // the 'last' ReactActivity is being destroyed, which effectively means the app is being
    // backgrounded.
    if (hasBeenInitialized() && mClearOnDestroy) {
      Fresco.getImagePipeline().clearMemoryCaches();
    }
  }
}
