From 8f09f910ef50efa56e0c08701c5a31ac5b489160 Mon Sep 17 00:00:00 2001
From: Florian Fischer <florian.fischer@muhq.space>
Date: Thu, 7 Aug 2025 18:01:30 +0200
Subject: highlight reachable tiles in hover info

---
 go/ui/hoverable.go | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/go/ui/hoverable.go b/go/ui/hoverable.go
index c70340bb..75c04fe8 100644
--- a/go/ui/hoverable.go
+++ b/go/ui/hoverable.go
@@ -1,6 +1,7 @@
 package ui
 
 import (
+	"golang.org/x/exp/slices"
 	"muhq.space/muhqs-game/go/game"
 )
 
@@ -31,7 +32,11 @@ func (h *hoverWidget) showHint(x, y int) {
 	}
 
 	h.c.AddWidget(hint)
+	oldReset := h.reset
 	h.reset = func() {
+		if oldReset != nil {
+			oldReset()
+		}
 		h.c.RemoveWidget(hint)
 	}
 }
@@ -97,6 +102,27 @@ func (h *hoverPermInfo) init(mv *MapView, c *Collection) {
 			return nil
 		}
 
+		if unit, ok := obj.(*game.Unit); ok {
+			reachableRange := unit.Attack.MaxRange() + unit.Movement.Range
+			movable := unit.MoveRangeTiles()
+			for _, t := range movable {
+				mv.AddHighlightTile(t, HighlightMovementColor)
+			}
+
+			// TODO: only show actually reachable tiles
+			attackable := game.TilesInRange(mv.gameState.Map(), perm, reachableRange)
+			for _, t := range attackable {
+				if slices.Contains(movable, t) {
+					continue
+				}
+				mv.AddHighlightTile(t, HighlightAttackColor)
+			}
+
+			h.reset = func() {
+				mv.ClearTileHighlights()
+			}
+		}
+
 		hint := NewPermInfo(x+TILE_WIDTH, y, perm)
 
 		wx, wy := x, y
-- 
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