// <copyright file="MyClassWithRedactionEnumerator.cs" company="OpenTelemetry Authors">
// Copyright The OpenTelemetry Authors
//
// 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
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// </copyright>

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

namespace Redaction
{
    internal class MyClassWithRedactionEnumerator : IReadOnlyList<KeyValuePair<string, object>>
    {
        private readonly IReadOnlyList<KeyValuePair<string, object>> state;

        public MyClassWithRedactionEnumerator(IReadOnlyList<KeyValuePair<string, object>> state)
        {
            this.state = state;
        }

        public int Count => this.state.Count;

        public KeyValuePair<string, object> this[int index]
        {
            get
            {
                var item = this.state[index];
                var entryVal = item.Value;
                if (entryVal != null && entryVal.ToString() != null && entryVal.ToString().Contains("<secret>"))
                {
                    return new KeyValuePair<string, object>(item.Key, "newRedactedValueHere");
                }

                return item;
            }
        }

        public IEnumerator<KeyValuePair<string, object>> GetEnumerator()
        {
            for (var i = 0; i < this.Count; i++)
            {
                yield return this[i];
            }
        }

        IEnumerator IEnumerable.GetEnumerator()
        {
            return this.GetEnumerator();
        }
    }
}
