using System;

using System.Collections;

using System.Collections.Generic;

using System.Dynamic;

using System.Linq;

using System.Text;

using Simple.Data.Extensions;

namespace Simple.Data

{

static class BinderHelper

{

private static IDictionary<string, object> NamedArgumentsToDictionary(IEnumerable<string> argumentNames, IEnumerable<object> args)

{

return argumentNames

.Reverse()

.Zip(args.Reverse(), (k, v) => new KeyValuePair<string, object>(k, v))

.Reverse()

.ToDictionary(StringComparer.InvariantCultureIgnoreCase);

}

private static IDictionary<string, object> ArgumentsToDictionary(IEnumerable<String> argumentNames, IEnumerable<object> args)

{

var argsArray = args.ToArray();

if (argsArray.Length == 1 && argsArray[0] is IDictionary<string, object>)

return (IDictionary<string, object>)argsArray[0];

return argsArray.Reverse()

.Zip(argumentNames.Reverse().ExtendInfinite(), (v, k) => new KeyValuePair<string, object>(k, v))

.Reverse()

.Select((kvp, i) => kvp.Key == null ? new KeyValuePair<string, object>("_" + i.ToString(), kvp.Value ?? DBNull.Value) : kvp)

.ToDictionary(StringComparer.InvariantCultureIgnoreCase);

}

internal static IDictionary<string, object> NamedArgumentsToDictionary(this InvokeMemberBinder binder, IEnumerable<object> args)

{

return NamedArgumentsToDictionary(binder.CallInfo.ArgumentNames, args);

}

public static IDictionary<string, object> ArgumentsToDictionary(this InvokeMemberBinder binder, IEnumerable<object> args)

{

return ArgumentsToDictionary(binder.CallInfo.ArgumentNames, args);

}

internal static IDictionary<string, object> NamedArgumentsToDictionary(this InvokeBinder binder, IEnumerable<object> args)

{

return NamedArgumentsToDictionary(binder.CallInfo.ArgumentNames, args);

}

public static IDictionary<string, object> ArgumentsToDictionary(this InvokeBinder binder, IEnumerable<object> args)

{

return ArgumentsToDictionary(binder.CallInfo.ArgumentNames, args);

}

}

}