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/*
 * Copyright [2017] [Andy Moncsek]
 *
 * 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 org.jacpfx.vertx.rest.response.blocking;

import io.netty.handler.codec.http.HttpResponseStatus;
import io.vertx.core.AsyncResult;
import io.vertx.core.Future;
import io.vertx.core.Handler;
import io.vertx.core.Vertx;
import io.vertx.ext.web.RoutingContext;
import java.util.Map;
import java.util.Objects;
import java.util.Optional;
import java.util.function.Consumer;
import org.jacpfx.common.ExecutionResult;
import org.jacpfx.common.VxmsShared;
import org.jacpfx.common.encoder.Encoder;
import org.jacpfx.common.throwable.ThrowableFunction;
import org.jacpfx.common.throwable.ThrowableSupplier;
import org.jacpfx.vertx.rest.interfaces.blocking.ExecuteEventbusStringCallBlocking;
import org.jacpfx.vertx.rest.response.basic.ExecuteRSBasicString;
import org.jacpfx.vertx.rest.response.basic.ResponseExecution;

/**
 * Created by Andy Moncsek on 12.01.16.
 * This class is the end of the blocking fluent API, all data collected to execute the chain.
 */
public class ExecuteRSString extends ExecuteRSBasicString {

  protected final long delay;
  protected final ExecuteEventbusStringCallBlocking excecuteAsyncEventBusAndReply;
  protected final ThrowableSupplier stringSupplier;
  protected final ThrowableFunction onFailureRespond;

  /**
   * The constructor to pass all needed members
   *
   * @param methodId the method identifier
   * @param vxmsShared the vxmsShared instance, containing the Vertx instance and other shared
   * objects per instance
   * @param failure the failure thrown while task execution
   * @param errorMethodHandler the error handler
   * @param context the vertx routing context
   * @param headers the headers to pass to the response
   * @param stringSupplier the supplier, producing the byte response
   * @param excecuteBlockingEventBusAndReply the response of an event-bus call which is passed to
   * the fluent API
   * @param encoder the encoder to encode your objects
   * @param errorHandler the error handler
   * @param onFailureRespond the consumer that takes a Future with the alternate response value in
   * case of failure
   * @param httpStatusCode the http status code to set for response
   * @param httpErrorCode the http error code to set in case of failure handling
   * @param retryCount the amount of retries before failure execution is triggered
   * @param timeout the amount of time before the execution will be aborted
   * @param delay the delay time in ms between an execution error and the retry
   * @param circuitBreakerTimeout the amount of time before the circuit breaker closed again
   */
  public ExecuteRSString(String methodId,
      VxmsShared vxmsShared,
      Throwable failure,
      Consumer errorMethodHandler,
      RoutingContext context,
      Map headers,
      ThrowableSupplier stringSupplier,
      ExecuteEventbusStringCallBlocking excecuteBlockingEventBusAndReply,
      Encoder encoder,
      Consumer errorHandler,
      ThrowableFunction onFailureRespond,
      int httpStatusCode,
      int httpErrorCode,
      int retryCount,
      long timeout,
      long delay,
      long circuitBreakerTimeout) {
    super(methodId,
        vxmsShared,
        failure,
        errorMethodHandler,
        context,
        headers,
        null,
        null,
        encoder,
        errorHandler,
        null,
        httpStatusCode,
        httpErrorCode,
        retryCount,
        timeout,
        circuitBreakerTimeout);
    this.delay = delay;
    this.excecuteAsyncEventBusAndReply = excecuteBlockingEventBusAndReply;
    this.stringSupplier = stringSupplier;
    this.onFailureRespond = onFailureRespond;
  }

  @Override
  public void execute(HttpResponseStatus status) {
    Objects.requireNonNull(status);
    new ExecuteRSString(methodId,
        vxmsShared,
        failure,
        errorMethodHandler,
        context,
        headers,
        stringSupplier,
        excecuteAsyncEventBusAndReply,
        encoder,
        errorHandler,
        onFailureRespond,
        status.code(),
        httpErrorCode,
        retryCount,
        timeout,
        delay,
        circuitBreakerTimeout).
        execute();
  }

  @Override
  public void execute(HttpResponseStatus status, String contentType) {
    Objects.requireNonNull(status);
    Objects.requireNonNull(contentType);
    new ExecuteRSString(methodId,
        vxmsShared,
        failure,
        errorMethodHandler,
        context,
        ResponseExecution.updateContentType(headers, contentType),
        stringSupplier,
        excecuteAsyncEventBusAndReply,
        encoder,
        errorHandler,
        onFailureRespond,
        status.code(),
        httpErrorCode,
        retryCount,
        timeout,
        delay,
        circuitBreakerTimeout).
        execute();
  }


  @Override
  public void execute(String contentType) {
    Objects.requireNonNull(contentType);
    new ExecuteRSString(methodId,
        vxmsShared,
        failure,
        errorMethodHandler,
        context,
        ResponseExecution.updateContentType(headers, contentType),
        stringSupplier,
        excecuteAsyncEventBusAndReply,
        encoder,
        errorHandler,
        onFailureRespond,
        httpStatusCode,
        httpErrorCode,
        retryCount,
        timeout,
        delay,
        circuitBreakerTimeout).
        execute();
  }

  @Override
  public void execute() {
    Optional.ofNullable(excecuteAsyncEventBusAndReply).ifPresent(evFunction -> {
      try {
        evFunction.execute(vxmsShared,
            failure,
            errorMethodHandler,
            context,
            headers,
            encoder,
            errorHandler,
            onFailureRespond,
            httpStatusCode,
            httpErrorCode,
            retryCount,
            timeout,
            delay,
            circuitBreakerTimeout);
      } catch (Exception e) {
        e.printStackTrace();
      }

    });
    Optional.ofNullable(stringSupplier).
        ifPresent(supplier -> {
              int retry = retryCount;
              final Vertx vertx = vxmsShared.getVertx();
              vertx.executeBlocking(handler -> executeAsync(supplier, retry, handler), false,
                  getAsyncResultHandler(retry));
            }

        );
  }

  private void executeAsync(ThrowableSupplier supplier, int retry,
      Future> blockingHandler) {
    ResponseBlockingExecution
        .executeRetryAndCatchAsync(methodId, supplier, blockingHandler, errorHandler,
            onFailureRespond, errorMethodHandler, vxmsShared, failure, retry, timeout,
            circuitBreakerTimeout, delay);
  }

  private Handler>> getAsyncResultHandler(int retry) {
    return value -> {
      if (!value.failed()) {
        ExecutionResult result = value.result();
        if (!result.handledError()) {
          respond(result.getResult());
        } else {
          respond(result.getResult(), httpErrorCode);
        }
      } else {
        checkAndCloseResponse(retry);
      }
    };
  }

}