// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.

#nullable disable

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Microsoft.Extensions.Internal;

namespace Microsoft.AspNetCore.Razor.Language.Legacy;

internal class TagHelperPrefixDirectiveChunkGenerator : SpanChunkGenerator
{
    public TagHelperPrefixDirectiveChunkGenerator(string prefix, string directiveText, List<RazorDiagnostic> diagnostics)
    {
        Prefix = prefix;
        DirectiveText = directiveText;
        Diagnostics = diagnostics;
    }

    public string Prefix { get; }

    public string DirectiveText { get; }

    public List<RazorDiagnostic> Diagnostics { get; }

    /// <inheritdoc />
    public override bool Equals(object obj)
    {
        var other = obj as TagHelperPrefixDirectiveChunkGenerator;
        return base.Equals(other) &&
            Enumerable.SequenceEqual(Diagnostics, other.Diagnostics) &&
            string.Equals(Prefix, other.Prefix, StringComparison.Ordinal) &&
            string.Equals(DirectiveText, other.DirectiveText, StringComparison.Ordinal);
    }

    /// <inheritdoc />
    public override int GetHashCode()
    {
        var combiner = HashCodeCombiner.Start();
        combiner.Add(base.GetHashCode());
        combiner.Add(Prefix, StringComparer.Ordinal);
        combiner.Add(DirectiveText, StringComparer.Ordinal);

        return combiner.CombinedHash;
    }

    public override string ToString()
    {
        var builder = new StringBuilder("TagHelperPrefix:{");
        builder.Append(Prefix);
        builder.Append(';');
        builder.Append(DirectiveText);
        builder.Append('}');

        if (Diagnostics.Count > 0)
        {
            builder.Append(" [");
            var ids = string.Join(", ", Diagnostics.Select(diagnostic => $"{diagnostic.Id}{diagnostic.Span}"));
            builder.Append(ids);
            builder.Append(']');
        }

        return builder.ToString();
    }
}