using System;

using System.Collections.Generic;

using System.Linq;

using System.Reflection;

using SharpRepository.Repository.Helpers;

namespace SharpRepository.Repository

{

public static class DefaultRepositoryConventions

{

public static string PrimaryKeySuffix = "Id";

public static string CachePrefix = "#Repo";

public static Func<Type, string> GetPrimaryKeyName = entityType =>

{

var propInfo = entityType.GetRuntimeProperties().FirstOrDefault(x => x.HasAttribute<RepositoryPrimaryKeyAttribute>());

if (propInfo != null) return propInfo.Name;

foreach (var propertyName in GetPrimaryKeyNameChecks(entityType))

{

propInfo = GetPropertyCaseInsensitive(entityType, propertyName);

if (propInfo != null) return propInfo.Name;

}

return null;

};

private static readonly Func<Type, IEnumerable<string>> GetPrimaryKeyNameChecks = type =>

{

var suffix = PrimaryKeySuffix;

return new[] {suffix, type.Name + suffix};

};

private static PropertyInfo GetPropertyCaseInsensitive(Type type, string propertyName)

{

return type.GetRuntimeProperties().Where(pi => pi.Name.ToLowerInvariant() == propertyName.ToLowerInvariant()).FirstOrDefault();

}

}

}