using System;
using System.Text;
using HeuristicLab.Problems.QuadraticAssignment;

namespace HeuristicLab.Services.ProblemInstances.QAPInitializer {
  class Program {
    static void Main(string[] args) {
      QuadraticAssignmentProblem qap = new QuadraticAssignmentProblem();
      using (ProblemInstancesEntities context = new ProblemInstancesEntities()) {
        foreach (string instance in qap.EmbeddedInstances) {
          qap.LoadEmbeddedInstance(instance);
          // transform matrices into jagged arrays
          double[][] weights = new double[qap.Weights.Rows][];
          double[][] distances = new double[qap.Weights.Rows][];
          for (int i = 0; i < weights.Length; i++) {
            weights[i] = new double[weights.Length];
            distances[i] = new double[weights.Length];
            for (int j = 0; j < weights.Length; j++) {
              weights[i][j] = qap.Weights[i, j];
              distances[i][j] = qap.Distances[i, j];
            }
          }

          QAPInstance dbInstance = context.CreateObject<QAPInstance>();
          dbInstance.name = qap.Name;
          dbInstance.description = qap.Description;
          dbInstance.maximization = qap.Maximization.Value;
          dbInstance.weights = PrimitiveSerializer.SerializeDoubleMatrix(weights);
          dbInstance.weights_sha1 = GetSHA1Hash(dbInstance.weights);
          dbInstance.distances = PrimitiveSerializer.SerializeDoubleMatrix(distances);
          dbInstance.distances_sha1 = GetSHA1Hash(dbInstance.distances);
          dbInstance.problemsize = qap.Weights.Rows;

          context.QAPInstances.AddObject(dbInstance);
        }
        context.SaveChanges();
      }
    }

    public static string GetSHA1Hash(string text) {
      var SHA1 = new System.Security.Cryptography.SHA1CryptoServiceProvider();

      byte[] arrayData;
      byte[] arrayResult;
      string result = null;
      string temp = null;

      arrayData = Encoding.ASCII.GetBytes(text);
      arrayResult = SHA1.ComputeHash(arrayData);
      for (int i = 0; i < arrayResult.Length; i++) {
        temp = Convert.ToString(arrayResult[i], 16);
        if (temp.Length == 1)
          temp = "0" + temp;
        result += temp;
      }
      return result;
    }
  }
}