// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
 
using System;
using System.Collections;
using System.Collections.Generic;
 
namespace Microsoft.CodeAnalysis.MSBuild;
 
internal readonly struct DiagnosticLog() : IEnumerable<DiagnosticLogItem>
{
    private readonly List<DiagnosticLogItem> _items = [];
 
    public int Count => _items.Count;
    public DiagnosticLogItem this[int index] => _items[index];
    public bool IsEmpty => _items.Count == 0;
 
    public IEnumerator<DiagnosticLogItem> GetEnumerator()
        => _items.GetEnumerator();
 
    IEnumerator IEnumerable.GetEnumerator()
        => GetEnumerator();
 
    public void Add(DiagnosticLogItem item)
        => _items.Add(item);
 
    public void Add(string message, string projectFilePath, DiagnosticLogItemKind kind = DiagnosticLogItemKind.Error)
        => _items.Add(new DiagnosticLogItem(kind, message, projectFilePath));
 
    public void Add(Exception exception, string projectFilePath, DiagnosticLogItemKind kind = DiagnosticLogItemKind.Error)
        => _items.Add(new DiagnosticLogItem(kind, exception.Message, projectFilePath));
}