using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using HeuristicLab.Data;
using HeuristicLab.Core;
using HeuristicLab.Persistence.Default.Xml;
using System.IO;
using HeuristicLab.OKB.AlgorithmHost.OKBRunner;

namespace HeuristicLab.OKB.AlgorithmHost {
  public static class OKBExtensions {

    public static void AddParameterValue(this Algorithm a, string name, object value) {      
      if (value == null) return;
      if (value is StringValue) {
        value = ((StringValue)value).Value;
      } else if (value is IntValue) {
        value = ((IntValue)value).Value;
      } else if (value is DoubleValue) {
        value = ((DoubleValue)value).Value;
      } else if (value is BoolValue) {
        value = ((BoolValue)value).Value;
      }
      Type t = value.GetType();
      Parameter p = new Parameter() {
        DataType = new DataType() { ClrName = t.FullName },
        Name = name
      };
      if (t == typeof(int)) {
        p.IntParameterValues = new List<IntParameterValue>() { new IntParameterValue() { Value = (int)value } };
      } else if (t == typeof(double)) {
        p.FloatParameterValues = new List<FloatParameterValue>() { new FloatParameterValue() { Value = (double)value } };
      } else if (t == typeof(string)) {
        p.CharParameterValues = new List<CharParameterValue>() { new CharParameterValue() { Value = (string)value } };      
      } else if (t == typeof(bool)) {
        p.IntParameterValues = new List<IntParameterValue>() { new IntParameterValue() { Value = ((bool)value) ? 1 : 0 } };
      } else if (value is Item) {
        byte[] data;
        using (var stream = new MemoryStream()) {
          XmlGenerator.Serialize(value, stream);
          data = stream.ToArray();
        }
        p.DataType.ClrName = "IOperator";
        p.OperatorParameterValues = new List<OperatorParameterValue>() {
          new OperatorParameterValue() {
            DataType = new DataType() { ClrName = t.FullName },
            Value = new Binary() { Bytes = data },
          },
        };
        if (value is IParameterizedItem) {
          foreach (var param in ((IParameterizedItem)value).Parameters) {
            try {
              a.AddParameterValue(string.Format("{0}:{1}.{2}", name, t.Name, param.Name), param.ActualValue);
            } catch (Exception x) {              
              // swallow exceptions
            }
          }
        }
      } else {
        throw new ArgumentException("invalid parameter data type" + t.ToString());
      }      
      if (a.Algorithm_Parameters.Any(ap => ap.Parameter.Name == name)) {
        throw new ArgumentException("duplicate parameter " + name);
      }
      a.Algorithm_Parameters.Add(new Algorithm_Parameter() {
        Algorithm = a,
        Parameter = p,
      });            
    }

    public static void AddResultValue(this Algorithm a, string name, object value) {
      if (value == null) return;
      if (value is StringValue) {
        value = ((StringValue)value).Value;
      } else if (value is IntValue) {
        value = ((IntValue)value).Value;
      } else if (value is DoubleValue) {
        value = ((DoubleValue)value).Value;
      } else if (value is BoolValue) {
        value = ((BoolValue)value).Value;
      }
      Type t = value.GetType();
      Result r = new Result() {
        DataType = new DataType() { ClrName = t.FullName },
        Name = name
      };
      if (t == typeof(int)) {
        r.IntResultValues = new List<IntResultValue>() { new IntResultValue() { Value = (int)value } };
      } else if (t == typeof(double)) {
        r.FloatResultValues = new List<FloatResultValue>() { new FloatResultValue() { Value = (double)value } };
      } else if (t == typeof(string)) {
        r.CharResultValues = new List<CharResultValue>() { new CharResultValue() { Value = (string)value } };
      } else if (value is Item) {
        byte[] data;
        using (var stream = new MemoryStream()) {
          XmlGenerator.Serialize(value, stream);
          data = stream.ToArray();
        }
        r.BlobResultValues = new List<BlobResultValue>() {
          new BlobResultValue() {
            Value = new Binary() { Bytes = data },
          } 
        };
      } else {
        throw new ArgumentException("unsupported result data type" + t.ToString());
      }
      a.Algorithm_Results.Add(new Algorithm_Result() {
        Algorithm = a,
        Result = r,
      });
    }
  }
}