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package io.netty.handler.codec.http;

import io.netty.util.ReferenceCounted;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;

public class Routed implements ReferenceCounted {
  protected final boolean                   notFound404;
  protected final HttpRequest               request;
  protected final String                    path;
  protected final Map       pathParams;
  protected final Map> queryParams;

  protected final ReferenceCounted requestAsReferenceCounted;

  //----------------------------------------------------------------------------

  public Routed(
      boolean                   notFound404,
      HttpRequest               request,
      String                    path,
      Map       pathParams,
      Map> queryParams)
  {
    this.notFound404 = notFound404;
    this.request     = request;
    this.path        = path;
    this.pathParams  = pathParams;
    this.queryParams = queryParams;

    requestAsReferenceCounted = (request instanceof ReferenceCounted)? (ReferenceCounted) request : null;
  }

  public boolean notFound404() {
    return notFound404;
  }

  public HttpRequest request() {
    return request;
  }

  public String path() {
    return path;
  }

  public Map pathParams() {
    return pathParams;
  }

  public Map> queryParams() {
    return queryParams;
  }

  //----------------------------------------------------------------------------
  // Utilities to get params.

  /**
   * @return The first query param, or null
   */
  public String queryParam(String name) {
    List values = queryParams.get(name);
    return (values == null)? null : values.get(0);
  }

  /** @return Uses path param first, then falls back to the first query param, or null */
  public String param(String name) {
    String pathValue = pathParams.get(name);
    return (pathValue == null)? queryParam(name) : pathValue;
  }

  /**
   * Both path param and query params are returned.
   * Empty list is returned if there are no such params.
   */
  public List params(String name) {
    List values = queryParams.get(name);
    if (values == null) values = new ArrayList();

    String value = pathParams.get(name);
    if (value != null) values.add(value);

    return values;
  }

  //----------------------------------------------------------------------------

  @Override
  public int refCnt() {
    return (requestAsReferenceCounted == null)? 0 : requestAsReferenceCounted.refCnt();
  }

  @Override
  public boolean release() {
    return (requestAsReferenceCounted == null)? true : requestAsReferenceCounted.release();
  }

  @Override
  public boolean release(int arg0) {
    return (requestAsReferenceCounted == null)? true : requestAsReferenceCounted.release(arg0);
  }

  @Override
  public ReferenceCounted retain() {
    if (requestAsReferenceCounted != null) requestAsReferenceCounted.retain();
    return this;
  }

  @Override
  public ReferenceCounted retain(int arg0) {
    if (requestAsReferenceCounted != null) requestAsReferenceCounted.retain(arg0);
    return this;
  }
}