using Content.Shared.Chemistry.Components;
using Content.Shared.Chemistry.Components.SolutionManager;
using Content.Shared.Chemistry.Reaction;

namespace Content.Shared.Chemistry.EntitySystems;

#region Events

/// <summary>
/// Ref event used to relay events raised on solution entities to their containers.
/// </summary>
/// <typeparam name="TEvent"></typeparam>
/// <param name="Event">The event that is being relayed.</param>
/// <param name="Solution">The container entity that the event is being relayed to.</param>
[ByRefEvent]
public record struct SolutionRelayEvent<TEvent>(TEvent Event, Entity<SolutionComponent> Solution)
{
    public readonly Entity<SolutionComponent> Solution = Solution;
    public TEvent Event = Event;
}

/// <summary>
/// Ref event used to relay events raised on solution containers to their contained solutions.
/// </summary>
/// <typeparam name="TEvent"></typeparam>
/// <param name="Event">The event that is being relayed.</param>
/// <param name="SolutionEnt">The solution entity that the event is being relayed to.</param>
/// <param name="Name">The name of the solution entity that the event is being relayed to.</param>
[ByRefEvent]
public record struct SolutionContainerRelayEvent<TEvent>(TEvent Event, Entity<SolutionComponent> SolutionEnt, string Name)
{
    public readonly Entity<SolutionComponent> SolutionEnt = SolutionEnt;
    public readonly string Name = Name;
    public TEvent Event = Event;
}

#endregion Events

public abstract partial class SharedSolutionContainerSystem
{
    protected void InitializeRelays()
    {
        SubscribeLocalEvent<ContainedSolutionComponent, ReactionAttemptEvent>(RelaySolutionRefEvent);
    }

    #region Relay Event Handlers

    private void RelaySolutionValEvent<TEvent>(EntityUid uid, ContainedSolutionComponent comp, TEvent @event)
    {
        var solution = Comp<SolutionComponent>(uid);
        var relayEvent = new SolutionRelayEvent<TEvent>(@event, (uid, solution));
        RaiseLocalEvent(comp.Container, ref relayEvent);
    }

    private void RelaySolutionRefEvent<TEvent>(Entity<ContainedSolutionComponent> entity, ref TEvent @event)
    {
        var solution = Comp<SolutionComponent>(entity);
        var relayEvent = new SolutionRelayEvent<TEvent>(@event, (entity, solution));
        RaiseLocalEvent(entity.Comp.Container, ref relayEvent);
        @event = relayEvent.Event;
    }

    private void RelaySolutionContainerEvent<TEvent>(EntityUid uid, SolutionManagerComponent comp, TEvent @event)
    {
        foreach (var (name, soln) in EnumerateSolutions((uid, comp)))
        {
            var relayEvent = new SolutionContainerRelayEvent<TEvent>(@event, soln, name!);
            RaiseLocalEvent(soln, ref relayEvent);
        }
    }

    private void RelaySolutionContainerEvent<TEvent>(Entity<SolutionManagerComponent> entity, ref TEvent @event)
    {
        foreach (var (name, soln) in EnumerateSolutions((entity.Owner, entity.Comp)))
        {
            var relayEvent = new SolutionContainerRelayEvent<TEvent>(@event, soln, name!);
            RaiseLocalEvent(soln, ref relayEvent);
            @event = relayEvent.Event;
        }
    }

    #endregion Relay Event Handlers
}