// Copyright (c) Microsoft Open Technologies, Inc.
// All Rights Reserved
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// THIS CODE IS PROVIDED *AS IS* BASIS, WITHOUT WARRANTIES OR
// CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING
// WITHOUT LIMITATION ANY IMPLIED WARRANTIES OR CONDITIONS OF
// TITLE, FITNESS FOR A PARTICULAR PURPOSE, MERCHANTABLITY OR
// NON-INFRINGEMENT.
// See the Apache 2 License for the specific language governing
// permissions and limitations under the License.

using System.Collections.Generic;
using System.Linq;

namespace Microsoft.AspNet.Identity
{
    /// <summary>
    ///     Represents the result of an identity operation
    /// </summary>
    public class IdentityResult
    {
        private static readonly IdentityResult _success = new IdentityResult(true);

        /// <summary>
        ///     Failure constructor that takes error messages
        /// </summary>
        /// <param name="errors"></param>
        public IdentityResult(params string[] errors) : this((IEnumerable<string>) errors)
        {
        }

        /// <summary>
        ///     Failure constructor that takes error messages
        /// </summary>
        /// <param name="errors"></param>
        public IdentityResult(IEnumerable<string> errors)
        {
            if (errors == null || !errors.Any())
            {
                errors = new[] {Resources.DefaultError};
            }
            Succeeded = false;
            Errors = errors;
        }

        private IdentityResult(bool success)
        {
            Succeeded = success;
            Errors = new string[0];
        }

        /// <summary>
        ///     True if the operation was successful
        /// </summary>
        public bool Succeeded { get; private set; }

        /// <summary>
        ///     List of errors
        /// </summary>
        public IEnumerable<string> Errors { get; private set; }

        /// <summary>
        ///     Static success result
        /// </summary>
        /// <returns></returns>
        public static IdentityResult Success
        {
            get { return _success; }
        }

        /// <summary>
        ///     Failed helper method
        /// </summary>
        /// <param name="errors"></param>
        /// <returns></returns>
        public static IdentityResult Failed(params string[] errors)
        {
            return new IdentityResult(errors);
        }
    }
}