// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
 
using System.CommandLine;
 
namespace Aspire.Cli.Templating;
 
internal class CallbackTemplate(
    string name,
    string description,
    Func<CliExecutionContext, string, string> pathDeriverCallback,
    Action<Command> applyOptionsCallback,
    Func<CallbackTemplate, TemplateInputs, ParseResult, CancellationToken, Task<TemplateResult>> applyTemplateCallback,
    TemplateRuntime runtime = TemplateRuntime.DotNet,
    string? languageId = null,
    Func<string, bool>? supportsLanguageCallback = null,
    IReadOnlyList<string>? selectableAppHostLanguages = null,
    bool isEmpty = false,
    bool showInPrompt = true) : ITemplate
{
    public string Name => name;
 
    public string Description => description;
 
    public bool IsEmpty => isEmpty;
 
    public bool ShowInPrompt => showInPrompt;
 
    public TemplateRuntime Runtime => runtime;
 
    public Func<CliExecutionContext, string, string> PathDeriver => pathDeriverCallback;
 
    public string? LanguageId => languageId;
 
    public IReadOnlyList<string> SelectableAppHostLanguages { get; } = selectableAppHostLanguages ?? [];
 
    public bool SupportsLanguage(string languageId)
    {
        if (supportsLanguageCallback is not null)
        {
            return supportsLanguageCallback(languageId);
        }
 
        return LanguageId is null || LanguageId.Equals(languageId, StringComparison.OrdinalIgnoreCase);
    }
 
    public void ApplyOptions(Command command)
    {
        applyOptionsCallback?.Invoke(command);
    }
 
    public Task<TemplateResult> ApplyTemplateAsync(TemplateInputs inputs, ParseResult parseResult, CancellationToken cancellationToken)
    {
        return applyTemplateCallback(this, inputs, parseResult, cancellationToken);
    }
}