using System;
using System.Collections.Generic;
using System.Linq;
using Svrnty.CQRS.Events.Abstractions.Discovery;

namespace Svrnty.CQRS.Events.Discovery;

/// <summary>
/// Default implementation of IEventDiscovery.
/// </summary>
public sealed class EventDiscovery : IEventDiscovery
{
    private readonly IEnumerable<IEventMeta> _eventMetas;

    public EventDiscovery(IEnumerable<IEventMeta> eventMetas)
    {
        _eventMetas = eventMetas;
    }

    public IEnumerable<IEventMeta> GetEvents() => _eventMetas;

    public IEventMeta? GetEvent(string name) =>
        _eventMetas.FirstOrDefault(e => e.Name == name);

    public IEventMeta? GetEvent(Type eventType) =>
        _eventMetas.FirstOrDefault(e => e.EventType == eventType);
}