#region License Information
/* HeuristicLab
 * Copyright (C) 2002-2017 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
 *
 * This file is part of HeuristicLab.
 *
 * HeuristicLab is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * HeuristicLab 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 Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
 */
#endregion

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;

namespace HeuristicLab.Problems.Instances.CFSAP {
  public class BozejkoCFSAPParser {
    public int Jobs { get; private set; }
    public int[] Machines { get; private set; }
    public int Nests { get; private set; }
    public List<int[][]> ProcessingTimes { get; private set; }
    public List<int[][][]> SetupTimes { get; private set; }

    public void Parse(Stream stream) {
      using (var reader = new StreamReader(stream)) {
        Nests = GetNextInteger(reader);
        Jobs = GetNextInteger(reader);
        Machines = Enumerable.Range(0, Nests).Select(x => GetNextInteger(reader)).ToArray();
        ProcessingTimes = new List<int[][]>(Nests);
        SetupTimes = new List<int[][][]>(Nests);

        for (var n = 0; n < Nests; n++) {
          var machines = Machines[n];
          var pr = new int[machines][];
          for (var m = 0; m < machines; m++) {
            pr[m] = new int[Jobs];
            for (var j = 0; j < Jobs; j++) {
              pr[m][j] = GetNextInteger(reader);
            }
          }
          ProcessingTimes.Add(pr);
        }
        for (var n = 0; n < Nests; n++) {
          var machines = Machines[n];
          var sp = new int[machines][][];
          for (var m = 0; m < machines; m++) {
            sp[m] = new int[Jobs][];
            for (var j = 0; j < Jobs; j++) {
              sp[m][j] = new int[Jobs];
              for (var i = 0; i < Jobs; i++) {
                sp[m][j][i] = GetNextInteger(reader);
              }
            }
          }
          SetupTimes.Add(sp);
        }
        reader.Close();
        stream.Close();
      }
    }

    private int GetNextInteger(StreamReader reader) {
      var builder = new StringBuilder();
      int r = reader.Read();
      while (r >= 0) {
        var c = (char)r;
        if ((c == ' ' || c == '\t' || c == '\r' || c == '\n') && builder.Length > 0)
          return int.Parse(builder.ToString());
        if (c == 'N' || c == 'M') {
          // consume the whole line
          reader.ReadLine();
          r = reader.Read();
          continue;
        }
        if (char.IsNumber(c)) builder.Append(c);
        r = reader.Read();
        if (r == -1 && builder.Length > 0) return int.Parse(builder.ToString());
      }
      throw new InvalidOperationException("Stream does not contain more numbers");
    }
  }
}