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/* Author: Wim Meeussen */

#include <string>
#include <gtest/gtest.h>
#include "urdf/model.h"

// Including ros, just to be able to call ros::init(), to remove unwanted
// args from command-line.
#include <ros/ros.h>

using namespace urdf;

int g_argc;
char** g_argv;

class TestParser : public testing::Test
{
public:

  bool checkModel(urdf::Model & robot)
  {
    // get root link
    boost::shared_ptr<const Link> root_link = robot.getRoot();
    if (!root_link)
    {
      ROS_ERROR("no root link %s", robot.getName().c_str());
      return false;
    }

    // go through entire tree
    return this->traverse_tree(root_link);

  };

protected:
  /// constructor
  // num_links starts at 1 because traverse_tree doesn't count the root node
  TestParser() : num_joints(0), num_links(1)
  {
  }


  /// Destructor
  ~TestParser()
  {
  }

  bool traverse_tree(boost::shared_ptr<const Link> link,int level = 0)
  {
    ROS_INFO("Traversing tree at level %d, link size %lu", level, link->child_links.size());
    level+=2;
    bool retval = true;
    for (std::vector<boost::shared_ptr<Link> >::const_iterator child = link->child_links.begin(); child != link->child_links.end(); child++)
    {
      ++num_links;
      if (*child && (*child)->parent_joint)
      {
        ++num_joints;
        // check rpy
        double roll,pitch,yaw;
        (*child)->parent_joint->parent_to_joint_origin_transform.rotation.getRPY(roll,pitch,yaw);

        if (isnan(roll) || isnan(pitch) || isnan(yaw))
        {
          ROS_ERROR("getRPY() returned nan!");
          return false;
        }
        // recurse down the tree
        retval &= this->traverse_tree(*child,level);
      }
      else
      {
        ROS_ERROR("root link: %s has a null child!",link->name.c_str());
        return false;
      }
    }
    // no more children
    return retval;
  };

  size_t num_joints;
  size_t num_links;
};




TEST_F(TestParser, test)
{
  ASSERT_GE(g_argc, 3);
  std::string folder = std::string(g_argv[1]) + "/test/";
  ROS_INFO("Folder %s",folder.c_str());
  std::string file = std::string(g_argv[2]);
  bool expect_success = (file.substr(0,5)  != "fail_");
  urdf::Model robot;
  ROS_INFO("Parsing file %s, expecting %d",(folder + file).c_str(), expect_success);
  if (!expect_success) {
    ASSERT_FALSE(robot.initFile(folder + file));
    return;
  }

  ASSERT_EQ(g_argc, 7);
  std::string robot_name = std::string(g_argv[3]);
  std::string root_name = std::string(g_argv[4]);
  size_t expected_num_joints = atoi(g_argv[5]);
  size_t expected_num_links = atoi(g_argv[6]);

  ASSERT_TRUE(robot.initFile(folder + file));

  EXPECT_EQ(robot.getName(), robot_name);
  boost::shared_ptr<const urdf::Link> root = robot.getRoot();
  ASSERT_TRUE(root);
  EXPECT_EQ(root->name, root_name);

  ASSERT_TRUE(checkModel(robot));
  EXPECT_EQ(num_joints, expected_num_joints);
  EXPECT_EQ(num_links, expected_num_links);
  EXPECT_EQ(robot.joints_.size(), expected_num_joints);
  EXPECT_EQ(robot.links_.size(), expected_num_links);

  // test reading from parameter server
  ASSERT_TRUE(robot.initParam("robot_description"));
  ASSERT_FALSE(robot.initParam("robot_description_wim"));
  SUCCEED();
}




int main(int argc, char** argv)
{
  // Calling ros::init(), just to remove unwanted args from command-line.
  ros::init(argc, argv, "test", ros::init_options::AnonymousName);
  testing::InitGoogleTest(&argc, argv);
  g_argc = argc;
  g_argv = argv;
  return RUN_ALL_TESTS();
}
