using System.Diagnostics.CodeAnalysis;
using FluentValidation;
using Microsoft.Extensions.DependencyInjection;
using Svrnty.CQRS.Abstractions;
using Svrnty.CQRS.Configuration;

namespace Svrnty.CQRS.FluentValidation;

/// <summary>
/// Extension methods for CqrsBuilder to support FluentValidation
/// </summary>
public static class CqrsBuilderExtensions
{
    /// <summary>
    /// Adds a command handler with FluentValidation validator to the CQRS pipeline
    /// </summary>
    public static CqrsBuilder AddCommand<TCommand, [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] TCommandHandler, [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] TValidator>(
        this CqrsBuilder builder)
        where TCommand : class
        where TCommandHandler : class, ICommandHandler<TCommand>
        where TValidator : class, IValidator<TCommand>
    {
        // Add the command handler
        builder.AddCommand<TCommand, TCommandHandler>();

        // Add the validator
        builder.Services.AddTransient<IValidator<TCommand>, TValidator>();

        return builder;
    }

    /// <summary>
    /// Adds a command handler with result and FluentValidation validator to the CQRS pipeline
    /// </summary>
    public static CqrsBuilder AddCommand<TCommand, TResult, [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] TCommandHandler, [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] TValidator>(
        this CqrsBuilder builder)
        where TCommand : class
        where TCommandHandler : class, ICommandHandler<TCommand, TResult>
        where TValidator : class, IValidator<TCommand>
    {
        // Add the command handler
        builder.AddCommand<TCommand, TResult, TCommandHandler>();

        // Add the validator
        builder.Services.AddTransient<IValidator<TCommand>, TValidator>();

        return builder;
    }

    /// <summary>
    /// Adds a query handler with FluentValidation validator to the CQRS pipeline
    /// </summary>
    public static CqrsBuilder AddQuery<TQuery, TResult, [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] TQueryHandler, [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] TValidator>(
        this CqrsBuilder builder)
        where TQuery : class
        where TQueryHandler : class, IQueryHandler<TQuery, TResult>
        where TValidator : class, IValidator<TQuery>
    {
        // Add the query handler
        builder.AddQuery<TQuery, TResult, TQueryHandler>();

        // Add the validator
        builder.Services.AddTransient<IValidator<TQuery>, TValidator>();

        return builder;
    }
}