// 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.Collections.Immutable;
using System.Diagnostics;
using System.Threading;
using System.Threading.Tasks;
using Microsoft.CodeAnalysis.CodeActions;
using Microsoft.CodeAnalysis.CodeFixes;
using Microsoft.CodeAnalysis.Editing;
using Microsoft.CodeAnalysis.EmbeddedLanguages;
using Microsoft.CodeAnalysis.Shared.Extensions;

namespace Microsoft.CodeAnalysis.Features.EmbeddedLanguages.Json.LanguageServices;

/// <summary>
/// Code fix impl for embedded json strings.
/// </summary>
internal abstract class AbstractJsonDetectionCodeFixProvider : SyntaxEditorBasedCodeFixProvider
{
    private readonly EmbeddedLanguageInfo _info;

    protected AbstractJsonDetectionCodeFixProvider(
        EmbeddedLanguageInfo info)
    {
        _info = info;
    }

    protected abstract void AddComment(SyntaxEditor editor, SyntaxToken stringLiteral, string commentContents);

    public override ImmutableArray<string> FixableDiagnosticIds
        => [AbstractJsonDetectionAnalyzer.DiagnosticId];

    public override Task RegisterCodeFixesAsync(CodeFixContext context)
    {
        RegisterCodeFix(context, FeaturesResources.Enable_all_JSON_editor_features, nameof(FeaturesResources.Enable_all_JSON_editor_features));
        return Task.CompletedTask;
    }

    public void Fix(SyntaxEditor editor, Diagnostic diagnostic, CancellationToken cancellationToken)
    {
        var stringLiteral = diagnostic.Location.FindToken(cancellationToken);
        Debug.Assert(_info.IsAnyStringLiteral(stringLiteral.RawKind));

        var commentContents = diagnostic.Properties.ContainsKey(AbstractJsonDetectionAnalyzer.StrictKey)
            ? "lang=json,strict"
            : "lang=json";

        this.AddComment(editor, stringLiteral, commentContents);
    }

    protected override Task FixAllAsync(
        Document document, ImmutableArray<Diagnostic> diagnostics,
        SyntaxEditor editor, CancellationToken cancellationToken)
    {
        foreach (var diagnostic in diagnostics)
            Fix(editor, diagnostic, cancellationToken);

        return Task.CompletedTask;
    }
}
