// This is brl/bpro/core/vil_pro/processes/vil_load_image_view_binary_process.cxx
#include <iostream>
#include <string>
#include <bprb/bprb_func_process.h>
//:
// \file

#include <bprb/bprb_parameters.h>
#ifdef _MSC_VER
#  include "vcl_msvc_warnings.h"
#endif
#include "vil/vil_image_view_base.h"
#include <vil/io/vil_io_image_view_base.h>

//: Constructor
bool vil_load_image_view_binary_process_cons(bprb_func_process& pro)
{
  //input
  bool ok=false;
  std::vector<std::string> input_types;
  input_types.emplace_back("vcl_string");
  ok = pro.set_input_types(input_types);
  if (!ok) return ok;

  //output
  std::vector<std::string> output_types;
  output_types.emplace_back("vil_image_view_base_sptr");
  ok = pro.set_output_types(output_types);
  if (!ok) return ok;
  return true;
}


//: Execute the process
bool vil_load_image_view_binary_process(bprb_func_process& pro)
{
  // Sanity check
  if (pro.n_inputs()< 1) {
    std::cout << "vil_load_image_view_binary_process: The input number should be 1" << std::endl;
    return false;
  }

  // get the inputs
  unsigned i=0;
  std::string image_filename = pro.get_input<std::string>(i++);

  vsl_b_ifstream is(image_filename);
  vil_image_view_base_sptr loaded_image;
  vsl_b_read(is, loaded_image);
  is.close();

  if ( !loaded_image ) {
    std::cerr << "Failed to load image file: " << image_filename << std::endl;
    return false;
  }

  pro.set_output_val<vil_image_view_base_sptr>(0, loaded_image);
  return true;
}