using System;
using System.Collections.Generic;
using System.Text;

namespace sharpcomparer
{
    public class ProcedureParameterComparison : Comparison<ProcedureParameter>
    {
        public ProcedureParameterComparison(ProcedureParameter leftItem, ProcedureParameter rightItem, Comparison<ProcedureParameter>.ComparisonDifference difference)
            : base(leftItem, rightItem, difference)
        {
        }

        public static List<ProcedureParameterComparison> Compare(List<ProcedureParameter> left, List<ProcedureParameter> right)
        {
            left.Sort(delegate(ProcedureParameter p1, ProcedureParameter p2)
            {
                return p1.OrdinalPosition.CompareTo(p2.OrdinalPosition);
            });
            right.Sort(delegate(ProcedureParameter p1, ProcedureParameter p2)
            {
                return p1.OrdinalPosition.CompareTo(p2.OrdinalPosition);
            });

            List<ProcedureParameterComparison> comparison = new List<ProcedureParameterComparison>();
            foreach (ProcedureParameter item in left)
            {
                ProcedureParameter result = right.Find(
                    delegate(ProcedureParameter find)
                    {
                        return find.ParameterName == item.ParameterName;
                    }
                );
                if (result != null)
                {
                    if (item != result)
                    {
                        comparison.Add(new ProcedureParameterComparison(item, result, ComparisonDifference.Different));
                    }
                    else
                    {
                        comparison.Add(new ProcedureParameterComparison(item, result, ComparisonDifference.None));
                    }
                }
                else
                {
                    comparison.Add(new ProcedureParameterComparison(item, null, ComparisonDifference.LeftOnly));
                }
            }
            foreach (ProcedureParameter item in right)
            {
                ProcedureParameter result = left.Find(
                    delegate(ProcedureParameter find)
                    {
                        return find.ParameterName == item.ParameterName;
                    }
                );
                if (result == null)
                {
                    comparison.Add(new ProcedureParameterComparison(null, item, ComparisonDifference.RightOnly));
                }
            }
            return comparison;
        }
    }
}