// -*- Mode: C++ -*-
//
// Copyright (C) 2013-2015 Red Hat, Inc.
//
// This file is part of the GNU Application Binary Interface Generic
// Analysis and Instrumentation Library (libabigail).  This library is
// free software; you can redistribute it and/or modify it under the
// terms of the GNU Lesser General Public License as published by the
// Free Software Foundation; either version 3, or (at your option) any
// later version.

// This library is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// General Lesser Public License for more details.

// You should have received a copy of the GNU Lesser General Public
// License along with this program; see the file COPYING-LGPLV3.  If
// not, see <http://www.gnu.org/licenses/>.

/// @file read an XML corpus file (in the native Abigail XML format),
/// save it back and diff the resulting XML file against the input
/// file.  They should be identical.

#include <string>
#include <fstream>
#include <iostream>
#include <cstdlib>
#include "abg-ir.h"
#include "abg-reader.h"
#include "abg-writer.h"
#include "abg-tools-utils.h"
#include "test-utils.h"

using std::string;
using std::ofstream;
using std::cerr;

using abigail::tools_utils::file_type;
using abigail::tools_utils::check_file;
using abigail::tools_utils::guess_file_type;
using abigail::translation_unit;
using abigail::corpus_sptr;
using abigail::xml_reader::read_translation_unit_from_file;
using abigail::xml_reader::read_corpus_from_native_xml_file;
using abigail::xml_writer::write_translation_unit;
using abigail::xml_writer::write_corpus_to_native_xml;

/// This is an aggregate that specifies where a test shall get its
/// input from, and where it shall write its ouput to.
struct InOutSpec
{
  const char* in_path;
  const char* out_path;
};// end struct InOutSpec


InOutSpec in_out_specs[] =
{
  {
    "data/test-read-write/test0.xml",
    "output/test-read-write/test0.xml"
  },
  {
    "data/test-read-write/test1.xml",
    "output/test-read-write/test1.xml"
  },
  {
    "data/test-read-write/test2.xml",
    "output/test-read-write/test2.xml"
  },
  {
    "data/test-read-write/test3.xml",
    "output/test-read-write/test3.xml"
  },
  {
    "data/test-read-write/test4.xml",
    "output/test-read-write/test4.xml"
  },
  {
    "data/test-read-write/test5.xml",
    "output/test-read-write/test5.xml"
  },
  {
    "data/test-read-write/test6.xml",
    "output/test-read-write/test6.xml"
  },
  {
    "data/test-read-write/test7.xml",
    "output/test-read-write/test7.xml"
  },
  {
    "data/test-read-write/test8.xml",
    "output/test-read-write/test8.xml"
  },
  {
    "data/test-read-write/test9.xml",
    "output/test-read-write/test9.xml"
  },
  {
    "data/test-read-write/test10.xml",
    "output/test-read-write/test10.xml"
  },
  {
    "data/test-read-write/test11.xml",
    "output/test-read-write/test11.xml"
  },
  {
    "data/test-read-write/test12.xml",
    "output/test-read-write/test12.xml"
  },
  {
    "data/test-read-write/test13.xml",
    "output/test-read-write/test13.xml"
  },
  {
    "data/test-read-write/test14.xml",
    "output/test-read-write/test14.xml"
  },
  {
    "data/test-read-write/test15.xml",
    "output/test-read-write/test15.xml"
  },
  {
    "data/test-read-write/test16.xml",
    "output/test-read-write/test16.xml"
  },
  {
    "data/test-read-write/test17.xml",
    "output/test-read-write/test17.xml"
  },
  {
    "data/test-read-write/test18.xml",
    "output/test-read-write/test18.xml"
  },
  {
    "data/test-read-write/test19.xml",
    "output/test-read-write/test19.xml"
  },
  {
    "data/test-read-write/test20.xml",
    "output/test-read-write/test20.xml"
  },
  {
    "data/test-read-write/test21.xml",
    "output/test-read-write/test21.xml"
  },
  {
    "data/test-read-write/test22.xml",
    "output/test-read-write/test22.xml"
  },
  {
    "data/test-read-write/test23.xml",
    "output/test-read-write/test23.xml"
  },
  {
    "data/test-read-write/test24.xml",
    "output/test-read-write/test24.xml"
  },
  {
    "data/test-read-write/test25.xml",
    "output/test-read-write/test25.xml"
  },
  {
    "data/test-read-write/test26.xml",
    "output/test-read-write/test26.xml"
  },
  // This should be the last entry.
  {NULL, NULL}
};

/// Walk the array of InOutSpecs above, read the input files it points
/// to, write it into the output it points to and diff them.
int
main()
{
  unsigned result = 1;

  bool is_ok = true;
  string in_path, out_path;
  for (InOutSpec* s = in_out_specs; s->in_path; ++s)
    {
      string input_suffix(s->in_path);
      in_path = abigail::tests::get_src_dir() + "/tests/" + input_suffix;

      if (!check_file(in_path, cerr))
	return true;

      translation_unit tu(in_path);
      corpus_sptr corpus;

      bool read = false;
      file_type t = guess_file_type(in_path);
      if (t == abigail::tools_utils::FILE_TYPE_NATIVE_BI)
	read = read_translation_unit_from_file(tu);
      else if (t == abigail::tools_utils::FILE_TYPE_XML_CORPUS)
	  read = (corpus = read_corpus_from_native_xml_file(in_path));
      else
	abort();
      if (!read)
	{
	  cerr << "failed to read " << in_path << "\n";
	  is_ok = false;
	  continue;
	}

      string output_suffix(s->out_path);
      out_path = abigail::tests::get_build_dir() + "/tests/" + output_suffix;
      if (!abigail::tools_utils::ensure_parent_dir_created(out_path))
	{
	  cerr << "Could not create parent director for " << out_path;
	  is_ok = false;
	  return result;
	}

      ofstream of(out_path.c_str(), std::ios_base::trunc);
      if (!of.is_open())
	{
	  cerr << "failed to read " << out_path << "\n";
	  is_ok = false;
	  continue;
	}

      bool r = false;

      if (t == abigail::tools_utils::FILE_TYPE_XML_CORPUS)
	r = write_corpus_to_native_xml(corpus, /*indent=*/0, of);
      else if (t == abigail::tools_utils::FILE_TYPE_NATIVE_BI)
	r = write_translation_unit(tu, /*indent=*/0, of);
      else
	abort();

      is_ok = (is_ok && r);
      of.close();
      string cmd = "diff -u " + in_path + " " + out_path;
      if (system(cmd.c_str()))
	is_ok = false;
    }

  return !is_ok;
}