using System.Collections;
using System.Reflection;
using UnityEngine;

namespace IdleSpectator;

/// <summary>Registers plot interest from Harmony hooks and World.plots polling.</summary>
public static class PlotInterestFeed
{
    public static void Emit(string plotAssetId, Actor subject, string phase)
    {
        if (AgentHarness.Busy)
        {
            return;
        }

        DiscreteEventEntry entry = PlotInterestCatalog.GetOrFallback(plotAssetId);
        if (!entry.CreatesInterest)
        {
            return;
        }

        Actor follow = subject;
        if (follow == null || !follow.isAlive())
        {
            // Plot without a living author: skip rather than invent a stranger.
            return;
        }

        string name = EventFeedUtil.SafeName(follow);
        string label = entry.MakeLabel(name, phase ?? "");
        string key = "plot:" + entry.Id + ":" + (phase ?? "active") + ":" + EventFeedUtil.SafeId(follow);
        EventFeedUtil.Register(
            key,
            "plot",
            entry.Category,
            label,
            entry.Id,
            entry.EventStrength,
            entry.OwnsCamera,
            follow.current_position,
            follow);
    }

    public static void EmitFromPlot(object plot, string phase)
    {
        if (plot == null)
        {
            return;
        }

        string assetId = ReadPlotAssetId(plot);
        Actor author = ReadPlotAuthor(plot);
        Emit(assetId, author, phase);
    }

    public static void Tick()
    {
        if (AgentHarness.Busy)
        {
            return;
        }

        IEnumerable plots = ResolvePlotsEnumerable();
        if (plots == null)
        {
            return;
        }

        int registered = 0;
        foreach (object plot in plots)
        {
            if (plot == null || registered >= 8)
            {
                break;
            }

            EmitFromPlot(plot, "active");
            registered++;
        }
    }

    private static IEnumerable ResolvePlotsEnumerable()
    {
        try
        {
            object world = World.world;
            if (world == null)
            {
                return null;
            }

            object plots = world.GetType().GetField("plots")?.GetValue(world)
                           ?? world.GetType().GetProperty("plots")?.GetValue(world, null);
            if (plots is IEnumerable direct)
            {
                return direct;
            }

            object manager = world.GetType().GetField("plots_manager")?.GetValue(world)
                             ?? world.GetType().GetProperty("plots_manager")?.GetValue(world, null)
                             ?? typeof(PlotManager);
            if (manager is System.Type)
            {
                manager = null;
            }

            object mapBox = MapBox.instance;
            if (manager == null && mapBox != null)
            {
                manager = mapBox.GetType().GetField("plots")?.GetValue(mapBox)
                          ?? mapBox.GetType().GetProperty("plots")?.GetValue(mapBox, null);
            }

            if (manager == null)
            {
                return null;
            }

            MethodInfo getAll = manager.GetType().GetMethod("getSimpleList")
                                ?? manager.GetType().GetMethod("getList")
                                ?? manager.GetType().GetMethod("getPlots");
            if (getAll != null)
            {
                return getAll.Invoke(manager, null) as IEnumerable;
            }

            return manager as IEnumerable;
        }
        catch
        {
            return null;
        }
    }

    private static string ReadPlotAssetId(object plot)
    {
        try
        {
            object asset = plot.GetType().GetField("asset")?.GetValue(plot)
                           ?? plot.GetType().GetProperty("asset")?.GetValue(plot, null)
                           ?? plot.GetType().GetMethod("getAsset")?.Invoke(plot, null);
            if (asset != null)
            {
                object id = asset.GetType().GetField("id")?.GetValue(asset)
                            ?? asset.GetType().GetProperty("id")?.GetValue(asset, null);
                if (id != null)
                {
                    return id.ToString();
                }
            }

            object typeId = plot.GetType().GetField("type")?.GetValue(plot)
                            ?? plot.GetType().GetProperty("type")?.GetValue(plot, null);
            return typeId?.ToString() ?? "unknown";
        }
        catch
        {
            return "unknown";
        }
    }

    private static Actor ReadPlotAuthor(object plot)
    {
        try
        {
            object author = plot.GetType().GetField("author")?.GetValue(plot)
                            ?? plot.GetType().GetProperty("author")?.GetValue(plot, null)
                            ?? plot.GetType().GetMethod("getAuthor")?.Invoke(plot, null)
                            ?? plot.GetType().GetField("founder")?.GetValue(plot);
            return author as Actor;
        }
        catch
        {
            return null;
        }
    }
}