/********************************************************************
 * This file includes the top-level function of this library
 * which reads an XML modeling OpenFPGA architecture to the associated
 * data structures
 *******************************************************************/
#include <string>

/* Headers from pugi XML library */
#include "pugixml.hpp"
#include "pugixml_util.hpp"

/* Headers from libarchfpga */
#include "arch_error.h"
#include "read_xml_util.h"

#include "read_xml_circuit_library.h"
#include "read_xml_openfpga_arch.h"

/********************************************************************
 * Top-level function to parse an XML file and load data to :
 * 1. circuit library
 *******************************************************************/
OpenFPGAArch read_xml_openfpga_arch(const char* arch_file_name) {
  OpenFPGAArch openfpga_arch;

  pugi::xml_node Next;

  /* Parse the file */
  pugi::xml_document doc;
  pugiutil::loc_data loc_data;

  try {
    loc_data = pugiutil::load_xml(doc, arch_file_name);

    /* Root node should be <circuit_settings> */
    auto xml_circuit_settings = get_single_child(doc, "openfpga_architecture", loc_data); 

    /* Parse circuit_models to circuit library 
     * under the node <module_circuit_models> 
     */
    auto xml_circuit_models = get_single_child(xml_circuit_settings, "circuit_library", loc_data);
    openfpga_arch.circuit_lib = read_xml_circuit_library(xml_circuit_models, loc_data);

    /* Build the internal links for the circuit library */
    openfpga_arch.circuit_lib.build_model_links();
  
    /* Build the timing graph inside the circuit library */
    openfpga_arch.circuit_lib.build_timing_graphs();

  } catch (pugiutil::XmlError& e) {
    archfpga_throw(arch_file_name, e.line(),
                   "%s", e.what());
  }

  return openfpga_arch;
}