using UnityEngine;

namespace IdleSpectator;

/// <summary>Unit-owned emits for deferred Phase 2 libraries (spells/items/decisions/etc.).</summary>
public static class DeferredInterestFeed
{
    public static void EmitSpell(string spellId, Actor caster)
    {
        EmitFromCatalog(
            "spell",
            spellId,
            caster,
            EventCatalog.Spell.GetOrFallback,
            related: null,
            locationOnly: false);
    }

    public static void EmitItem(string itemId, Actor craftsman)
    {
        EmitFromCatalog(
            "item",
            itemId,
            craftsman,
            EventCatalog.Item.GetOrFallback,
            related: null,
            locationOnly: false);
    }

    public static void EmitDecision(string decisionId, Actor actor)
    {
        EmitFromCatalog(
            "decision",
            decisionId,
            actor,
            EventCatalog.Decision.GetOrFallback,
            related: null,
            locationOnly: false);
    }

    public static void EmitPower(string powerId, Vector3 position, Actor nearUnit)
    {
        DiscreteEventEntry entry = EventCatalog.Power.GetOrFallback(powerId);
        if (!entry.CreatesInterest || AgentHarness.Busy)
        {
            return;
        }

        if (nearUnit != null && nearUnit.isAlive())
        {
            EmitFromCatalog("power", powerId, nearUnit, EventCatalog.Power.GetOrFallback, null, false);
            return;
        }

        if (position == Vector3.zero)
        {
            return;
        }

        EventFeedUtil.Register(
            "power:" + entry.Id,
            "power",
            entry.Category,
            EventReason.HumanizeId(entry.Id),
            entry.Id,
            entry.EventStrength,
            position,
            follow: null,
            locationOnly: true);
    }

    public static void EmitSubspeciesTrait(string traitId, Actor anchor)
    {
        EmitFromCatalog(
            "subspecies_trait",
            traitId,
            anchor,
            EventCatalog.SubspeciesTrait.GetOrFallback,
            related: null,
            locationOnly: false);
    }

    public static void EmitGene(string geneId, Actor actor)
    {
        EmitFromCatalog(
            "gene",
            geneId,
            actor,
            EventCatalog.Gene.GetOrFallback,
            related: null,
            locationOnly: false);
    }

    public static void EmitPhenotype(string phenotypeId, Actor actor)
    {
        EmitFromCatalog(
            "phenotype",
            phenotypeId,
            actor,
            EventCatalog.Phenotype.GetOrFallback,
            related: null,
            locationOnly: false);
    }

    public static void EmitWorldLaw(string lawId, Vector3 position)
    {
        if (AgentHarness.Busy || position == Vector3.zero)
        {
            return;
        }

        DiscreteEventEntry entry = EventCatalog.WorldLaw.GetOrFallback(lawId);
        if (!entry.CreatesInterest)
        {
            return;
        }

        EventFeedUtil.Register(
            "worldlaw:" + entry.Id,
            "worldlaw",
            entry.Category,
            EventReason.HumanizeId(entry.Id),
            entry.Id,
            entry.EventStrength,
            position,
            follow: null,
            locationOnly: true);
    }

    public static void EmitBiome(string biomeId, Vector3 position)
    {
        if (AgentHarness.Busy || position == Vector3.zero)
        {
            return;
        }

        DiscreteEventEntry entry = EventCatalog.Biome.GetOrFallback(biomeId);
        if (!entry.CreatesInterest)
        {
            return;
        }

        EventFeedUtil.Register(
            "biome:" + entry.Id,
            "biome",
            entry.Category,
            EventReason.HumanizeId(entry.Id),
            entry.Id,
            entry.EventStrength,
            position,
            follow: null,
            locationOnly: true);
    }

    private static void EmitFromCatalog(
        string source,
        string assetId,
        Actor subject,
        System.Func<string, DiscreteEventEntry> lookup,
        Actor related,
        bool locationOnly)
    {
        if (AgentHarness.Busy || lookup == null)
        {
            return;
        }

        DiscreteEventEntry entry = lookup(assetId);
        if (!entry.CreatesInterest)
        {
            return;
        }

        Actor follow = subject != null && subject.isAlive() ? subject : null;
        if (!locationOnly && follow == null)
        {
            return;
        }

        string label = EventReason.Library(follow, source, entry.Id);
        if (follow == null)
        {
            label = EventReason.HumanizeId(entry.Id);
        }

        string key = source + ":" + entry.Id + ":" + EventFeedUtil.SafeId(follow);
        EventFeedUtil.Register(
            key,
            source,
            entry.Category,
            label,
            entry.Id,
            entry.EventStrength,
            follow != null ? follow.current_position : Vector3.zero,
            follow,
            related: related,
            locationOnly: locationOnly);
    }
}