using UnityEngine;

namespace IdleSpectator;

/// <summary>
/// World skull hover highlight + click → Lore (no separate grave window).
/// </summary>
public static class GraveHover
{
    private const float HitRadius = 1.35f;

    /// <summary>Stack key under mouse - drives skull hover flicker.</summary>
    public static long HighlightStackKey { get; private set; }

    public static void Update()
    {
        HighlightStackKey = 0;
        if (!ModSettings.Enabled || !ModSettings.GravestonesEnabled)
        {
            return;
        }

        if (GraveMarkers.StackCount <= 0)
        {
            return;
        }

        bool overUi = false;
        try
        {
            overUi = World.world != null && World.world.isOverUI();
        }
        catch
        {
            overUi = false;
        }

        if (overUi
            && !ChronicleHud.IsPointerOverPanel()
            && !WatchCaption.IsPointerOverPanel())
        {
            // Pointer on other game UI - no hover highlight / click.
        }
        else
        {
            GraveMarkers.GraveStack hover = ResolveHoverStack();
            if (hover != null)
            {
                HighlightStackKey = hover.Key;
            }
        }

        HandleWorldClick();
    }

    private static void HandleWorldClick()
    {
        if (!InputHelpers.GetMouseButtonDown(0))
        {
            return;
        }

        if (ChronicleHud.IsPointerOverPanel() || WatchCaption.IsPointerOverInteractive())
        {
            return;
        }

        try
        {
            if (World.world != null && World.world.isOverUI())
            {
                return;
            }
        }
        catch
        {
            return;
        }

        GraveMarkers.GraveStack stack = ResolveHoverStack();
        if (stack == null || stack.Entries.Count == 0)
        {
            return;
        }

        InspectUi.MarkGraveSession();
        ChronicleHud.OpenGraveStack(stack.TileX, stack.TileY, pauseIdle: true);
    }

    private static GraveMarkers.GraveStack ResolveHoverStack()
    {
        try
        {
            WorldTile tile = World.world.getMouseTilePosCachedFrame() ?? World.world.getMouseTilePos();
            if (tile != null && GraveMarkers.TryGetStack(tile.x, tile.y, out GraveMarkers.GraveStack atTile))
            {
                return atTile;
            }

            Vector2 mouse = World.world.getMousePos();
            return GraveMarkers.FindNearestStack(mouse, HitRadius);
        }
        catch
        {
            return null;
        }
    }
}