/*
 *
 * Copyright 2015, Google Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above
 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
 * distribution.
 *     * Neither the name of Google Inc. nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 */

#include "call.h"

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include "php.h"
#include "php_ini.h"
#include "ext/standard/info.h"
#include "ext/spl/spl_exceptions.h"
#include "php_grpc.h"

#include "zend_exceptions.h"

#include <stdbool.h>

#include "grpc/grpc.h"
#include "grpc/support/log.h"
#include "grpc/grpc_security.h"

#include "server.h"
#include "completion_queue.h"
#include "channel.h"
#include "server_credentials.h"

zend_class_entry *grpc_ce_server;

/* Frees and destroys an instance of wrapped_grpc_server */
void free_wrapped_grpc_server(void *object TSRMLS_DC) {
  wrapped_grpc_server *server = (wrapped_grpc_server *)object;
  if (server->wrapped != NULL) {
    grpc_server_shutdown(server->wrapped);
    grpc_server_destroy(server->wrapped);
  }
  efree(server);
}

/* Initializes an instance of wrapped_grpc_call to be associated with an object
 * of a class specified by class_type */
zend_object_value create_wrapped_grpc_server(zend_class_entry *class_type
                                                 TSRMLS_DC) {
  zend_object_value retval;
  wrapped_grpc_server *intern;

  intern = (wrapped_grpc_server *)emalloc(sizeof(wrapped_grpc_server));
  memset(intern, 0, sizeof(wrapped_grpc_server));

  zend_object_std_init(&intern->std, class_type TSRMLS_CC);
  object_properties_init(&intern->std, class_type);
  retval.handle = zend_objects_store_put(
      intern, (zend_objects_store_dtor_t)zend_objects_destroy_object,
      free_wrapped_grpc_server, NULL TSRMLS_CC);
  retval.handlers = zend_get_std_object_handlers();
  return retval;
}

/**
 * Constructs a new instance of the Server class
 * @param CompletionQueue $queue The completion queue to use with the server
 * @param array $args The arguments to pass to the server (optional)
 */
PHP_METHOD(Server, __construct) {
  wrapped_grpc_server *server =
      (wrapped_grpc_server *)zend_object_store_get_object(getThis() TSRMLS_CC);
  zval *queue_obj;
  zval *args_array = NULL;
  grpc_channel_args args;
  /* "O|a" == 1 Object, 1 optional array */
  if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "O|a", &queue_obj,
                            grpc_ce_completion_queue, &args_array) == FAILURE) {
    zend_throw_exception(spl_ce_InvalidArgumentException,
                         "Server expects a CompletionQueue and an array",
                         1 TSRMLS_CC);
    return;
  }
  add_property_zval(getThis(), "completion_queue", queue_obj);
  wrapped_grpc_completion_queue *queue =
      (wrapped_grpc_completion_queue *)zend_object_store_get_object(
          queue_obj TSRMLS_CC);
  if (args_array == NULL) {
    server->wrapped = grpc_server_create(queue->wrapped, NULL);
  } else {
    php_grpc_read_args_array(args_array, &args);
    server->wrapped = grpc_server_create(queue->wrapped, &args);
    efree(args.args);
  }
}

/**
 * Request a call on a server. Creates a single GRPC_SERVER_RPC_NEW event.
 * @param long $tag_new The tag to associate with the new request
 * @param long $tag_cancel The tag to use if the call is cancelled
 * @return Void
 */
PHP_METHOD(Server, request_call) {
  grpc_call_error error_code;
  wrapped_grpc_server *server =
      (wrapped_grpc_server *)zend_object_store_get_object(getThis() TSRMLS_CC);
  long tag_new;
  /* "l" == 1 long */
  if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "l", &tag_new) ==
      FAILURE) {
    zend_throw_exception(spl_ce_InvalidArgumentException,
                         "request_call expects a long", 1 TSRMLS_CC);
    return;
  }
  error_code = grpc_server_request_call_old(server->wrapped, (void *)tag_new);
  MAYBE_THROW_CALL_ERROR(request_call, error_code);
}

/**
 * Add a http2 over tcp listener.
 * @param string $addr The address to add
 * @return true on success, false on failure
 */
PHP_METHOD(Server, add_http2_port) {
  wrapped_grpc_server *server =
      (wrapped_grpc_server *)zend_object_store_get_object(getThis() TSRMLS_CC);
  const char *addr;
  int addr_len;
  /* "s" == 1 string */
  if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s", &addr, &addr_len) ==
      FAILURE) {
    zend_throw_exception(spl_ce_InvalidArgumentException,
                         "add_http2_port expects a string", 1 TSRMLS_CC);
    return;
  }
  RETURN_LONG(grpc_server_add_http2_port(server->wrapped, addr));
}

PHP_METHOD(Server, add_secure_http2_port) {
  wrapped_grpc_server *server =
      (wrapped_grpc_server *)zend_object_store_get_object(getThis() TSRMLS_CC);
  const char *addr;
  int addr_len;
  zval *creds_obj;
  /* "sO" == 1 string, 1 object */
  if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s", &addr, &addr_len,
                            &creds_obj, grpc_ce_server_credentials) ==
      FAILURE) {
    zend_throw_exception(
        spl_ce_InvalidArgumentException,
        "add_http2_port expects a string and a ServerCredentials", 1 TSRMLS_CC);
    return;
  }
  wrapped_grpc_server_credentials *creds =
      (wrapped_grpc_server_credentials *)zend_object_store_get_object(
          creds_obj TSRMLS_CC);
  RETURN_LONG(grpc_server_add_secure_http2_port(server->wrapped, addr,
                                                creds->wrapped));
}

/**
 * Start a server - tells all listeners to start listening
 * @return Void
 */
PHP_METHOD(Server, start) {
  wrapped_grpc_server *server =
      (wrapped_grpc_server *)zend_object_store_get_object(getThis() TSRMLS_CC);
  grpc_server_start(server->wrapped);
}

static zend_function_entry server_methods[] = {
    PHP_ME(Server, __construct, NULL, ZEND_ACC_PUBLIC | ZEND_ACC_CTOR)
    PHP_ME(Server, request_call, NULL, ZEND_ACC_PUBLIC)
    PHP_ME(Server, add_http2_port, NULL, ZEND_ACC_PUBLIC)
    PHP_ME(Server, add_secure_http2_port, NULL, ZEND_ACC_PUBLIC)
    PHP_ME(Server, start, NULL, ZEND_ACC_PUBLIC) PHP_FE_END};

void grpc_init_server(TSRMLS_D) {
  zend_class_entry ce;
  INIT_CLASS_ENTRY(ce, "Grpc\\Server", server_methods);
  ce.create_object = create_wrapped_grpc_server;
  grpc_ce_server = zend_register_internal_class(&ce TSRMLS_CC);
}