// Environment_t.cxx

#include "dataset_util/Environment.h"
#include <iostream>
#include <cassert>
#include "dataset_util/XmlElement.h"

using std::cout;
using std::endl;

void msg(const char* msg) {
  cout << "----- ";
  cout << msg;
  cout << " -----" << endl;
}

int Environment_t() {

  msg("Empty");
  {
    Environment env;
    assert( env.size() == 0 );
  }

  msg("System");
  {
    Environment sysenv;
    sysenv.sysfill();
    cout << sysenv << endl;
  }

  msg("Build environment");
  {
    Environment env;
    assert( env.size() == 0 );
    assert( ! env.has("BB") );
    assert( env.value("BB") == "" );
    env["A"] = "Avalue";
    env["BB"] = "BB value";
    env["CPATH"] = "Cval1:Cval2:Cval3";
    cout << env << endl;
    assert( env.size() == 3 );
    assert( env.has("BB") );
    assert( env.value("BB") == "BB value" );
    msg("Fetch env table");
    {
      const char* const* cenv = env.env();
      assert( cenv != 0 );
      int ienv;
      for ( ienv=0; ienv<10; ++ienv ) {
        if ( cenv[ienv] == 0 ) break;
        cout << cenv[ienv] << endl;
      }
      assert( ienv == 3 );
      msg("Create new environment from table");
      Environment env2;
      env2.fill(cenv);
      cout << env2 << endl;
      assert( env2 == env );
    }
    msg("Fetch unsafe env table");
    {
      char* const* cenv = env.unsafe_env();
      msg("Create new environment from table");
      Environment env2;
      env2.fill(cenv);
      cout << env2 << endl;
      assert( env2 == env );
    }
    msg("Write to XML");
    const XmlElement* pele = env.xml();
    cout << *pele << endl;
    assert( pele->name() == Environment::xml_name() );
    msg("Read from xml");
    Environment env3(*pele);
    cout << env3 << endl;
    assert( env3 == env );
  }
    
  msg("Check system environment");
  {
    Environment env;
    env.sysfill();
    assert( env == Environment::initial() );
    assert( env == Environment::current() );
  }

  msg("All tests passed.");
  return 0;
}

#ifdef CTEST_MAIN
int main() {
  return Environment_t();
}
#endif