<?php
/*
 *
 * 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.
 *
 */

require dirname(__FILE__) . '/../vendor/autoload.php';
require dirname(__FILE__) . '/route_guide.php';

define('COORD_FACTOR', 1e7);

$client = new routeguide\RouteGuideClient(
  new Grpc\BaseStub('localhost:50051', []));

function printFeature($feature) {
  $name = $feature->getName();
  if (!$name) {
    $name_str = "no feature";
  } else {
    $name_str = "feature called $name";
  }
  print sprintf("Found %s \n  at %f, %f\n", $name_str,
                $feature->getLocation()->getLatitude() / COORD_FACTOR,
                $feature->getLocation()->getLongitude() / COORD_FACTOR);
}

/**
 * Run the getFeature demo. Calls getFeature with a point known to have a
 * feature and a point known not to have a feature.
 */
function runGetFeature() {
  print "Running GetFeature...\n";
  global $client;

  $point = new routeguide\Point();
  $points = array(
    array(409146138, -746188906),
    array(0, 0),
  );

  foreach ($points as $p) {
    $point->setLatitude($p[0]);
    $point->setLongitude($p[1]);
    // make a unary grpc call
    list($feature, $status) = $client->GetFeature($point)->wait();
    printFeature($feature);
  }
}

/**
 * Run the listFeatures demo. Calls listFeatures with a rectangle
 * containing all of the features in the pre-generated
 * database. Prints each response as it comes in.
 */
function runListFeatures() {
  print "Running ListFeatures...\n";
  global $client;

  $lo_point = new routeguide\Point();
  $hi_point = new routeguide\Point();

  $lo_point->setLatitude(400000000);
  $lo_point->setLongitude(-750000000);
  $hi_point->setLatitude(420000000);
  $hi_point->setLongitude(-730000000);

  $rectangle = new routeguide\Rectangle();
  $rectangle->setLo($lo_point);
  $rectangle->setHi($hi_point);

  $call = $client->ListFeatures($rectangle);
  // an iterator over the server streaming responses
  $features = $call->responses();
  foreach ($features as $feature) {
    printFeature($feature);
  }
}

/**
 * Run the recordRoute demo. Sends several randomly chosen points from the
 * pre-generated feature database with a variable delay in between. Prints
 * the statistics when they are sent from the server.
 */
function runRecordRoute() {
  print "Running RecordRoute...\n";
  global $client, $argv;

  $db = json_decode(file_get_contents($argv[1]), true);
  $points_iter = function($db) {
    $num_points_in_db = count($db);
    $num_points = 10;
    for ($i = 0; $i < $num_points; $i++) {
      $point = new routeguide\Point();
      $index = rand(0, $num_points_in_db - 1);
      $lat = $db[$index]['location']['latitude'];
      $long = $db[$index]['location']['longitude'];
      $feature_name = $db[$index]['name'];
      $point->setLatitude($lat);
      $point->setLongitude($long);
      print sprintf("Visiting point %f, %f,\n  with feature name: %s\n",
                    $lat / COORD_FACTOR, $long / COORD_FACTOR,
                    $feature_name ? $feature_name : '<empty>');
      usleep(rand(300000, 800000));
      yield $point;
    }
  };
  // $points_iter is an iterator simulating client streaming
  list($route_summary, $status) =
    $client->RecordRoute($points_iter($db))->wait();
  print sprintf("Finished trip with %d points\nPassed %d features\n".
                "Travelled %d meters\nIt took %d seconds\n",
                $route_summary->getPointCount(),
                $route_summary->getFeatureCount(),
                $route_summary->getDistance(),
                $route_summary->getElapsedTime());
}

/**
 * Run the routeChat demo. Send some chat messages, and print any chat
 * messages that are sent from the server.
 */
function runRouteChat() {
  print "Running RouteChat...\n";
  global $client;

  // start the bidirectional streaming call
  $call = $client->RouteChat();

  $notes = array(
    array(1, 1, 'first message'),
    array(1, 2, 'second message'),
    array(2, 1, 'third message'),
    array(1, 1, 'fourth message'),
    array(1, 1, 'fifth message'),
  );

  foreach ($notes as $n) {
    $point = new routeguide\Point();
    $point->setLatitude($lat = $n[0]);
    $point->setLongitude($long = $n[1]);

    $route_note = new routeguide\RouteNote();
    $route_note->setLocation($point);
    $route_note->setMessage($message = $n[2]);

    print sprintf("Sending message: '%s' at (%d, %d)\n",
                  $message, $lat, $long);
    // send a bunch of messages to the server
    $call->write($route_note);
  }
  $call->writesDone();

  // read from the server until there's no more
  while ($route_note_reply = $call->read()) {
    print sprintf("Previous left message at (%d, %d): '%s'\n",
                  $route_note_reply->getLocation()->getLatitude(),
                  $route_note_reply->getLocation()->getLongitude(),
                  $route_note_reply->getMessage());
  }
}

/**
 * Run all of the demos in order
 */
function main() {
  runGetFeature();
  runListFeatures();
  runRecordRoute();
  runRouteChat();
}

if (empty($argv[1])) {
  print "Usage: php -d extension=grpc.so route_guide_client.php " .
        "<path to route_guide_db.json>\n";
  exit(1);
}
main();