using Content.Shared.Bed.Sleep;
using Content.Shared.StatusEffect;
using Robust.Shared.Random;

namespace Content.Server.Traits.Assorted;

/// <summary>
/// This handles narcolepsy, causing the affected to fall asleep uncontrollably at a random interval.
/// </summary>
public sealed class NarcolepsySystem : EntitySystem
{
    private const string StatusEffectKey = "ForcedSleep"; // Same one used by N2O and other sleep chems.

    [Dependency] private readonly StatusEffectsSystem _statusEffects = default!;
    [Dependency] private readonly IRobustRandom _random = default!;

    /// <inheritdoc/>
    public override void Initialize()
    {
        SubscribeLocalEvent<NarcolepsyComponent, ComponentStartup>(SetupNarcolepsy);
    }

    private void SetupNarcolepsy(EntityUid uid, NarcolepsyComponent component, ComponentStartup args)
    {
        component.NextIncidentTime =
            _random.NextFloat(component.TimeBetweenIncidents.X, component.TimeBetweenIncidents.Y);
    }

    public override void Update(float frameTime)
    {
        base.Update(frameTime);

        foreach (var narcolepsy in EntityQuery<NarcolepsyComponent>())
        {
            narcolepsy.NextIncidentTime -= frameTime;

            if (narcolepsy.NextIncidentTime >= 0)
                continue;

            // Set the new time.
            narcolepsy.NextIncidentTime +=
                _random.NextFloat(narcolepsy.TimeBetweenIncidents.X, narcolepsy.TimeBetweenIncidents.Y);

            var duration = _random.NextFloat(narcolepsy.DurationOfIncident.X, narcolepsy.DurationOfIncident.Y);

            // Make sure the sleep time doesn't cut into the time to next incident.
            narcolepsy.NextIncidentTime += duration;

            _statusEffects.TryAddStatusEffect<ForcedSleepingComponent>(narcolepsy.Owner, StatusEffectKey,
                TimeSpan.FromSeconds(duration), false);
        }
    }
}