feat(combat): resolve all natural melee weapons in full_attack

src/pf1e_simulator/combat.py

@@ -2295,13 +2295,13 @@ class CombatEngine:
             return
         if target is None:
             return
-        weapon = self.weapon_for(state, target)
-        if weapon is None:
-            return
         if kind == "attack":
+            weapon = self.weapon_for(state, target)
+            if weapon is None:
+                return
             self._single_attack(state, target, weapon)
         elif kind == "full_attack":
-            self._full_attack(state, target, weapon)
+            self._full_attack(state, target)
     def _execute_charge(self, state: CombatantState, target: CombatantState | None) -> None:
         if target is None or not target.active:
             return
@@ -2819,8 +2819,30 @@ class CombatEngine:
         self._resolve_swing(attacker, target, weapon, label=weapon.name)
 
     def _full_attack(
+        self, attacker: CombatantState, target: CombatantState
+    ) -> None:
+        melee_weapons = [
+            w
+            for w in attacker.usable_attacks()
+            if w.kind == "melee" and self._melee_weapon_usable(attacker, target, w)
+        ]
+        if not melee_weapons:
+            # No melee weapon reaches: fall back to weapon_for (ranged/touch),
+            # preserving the pre-L3 single-weapon behavior.
+            weapon = self.weapon_for(attacker, target)
+            if weapon is None:
+                return
+            self._full_attack_weapon(attacker, target, weapon)
+            return
+        for weapon in melee_weapons:
+            if not attacker.active or not target.active:
+                return
+            self._full_attack_weapon(attacker, target, weapon)
+
+    def _full_attack_weapon(
         self, attacker: CombatantState, target: CombatantState, weapon: AttackSpec
     ) -> None:
+        """Resolve one weapon's full-attack swings (count swings or BAB iteratives)."""
         if weapon.count > 1:
             self._attack(attacker, target, weapon)
             return
@@ -2831,6 +2853,8 @@ class CombatEngine:
         for i in range(n):
             if not attacker.active:
                 return
+            if not target.active:
+                return
             if self._check_provoked_aoo(attacker, weapon):
                 return
             label = weapon.name if n == 1 else f"{weapon.name} #{i + 1}"
@@ -2840,6 +2864,20 @@ class CombatEngine:
             ):
                 return
 
+    def _melee_weapon_usable(
+        self, attacker: CombatantState, target: CombatantState, weapon: AttackSpec
+    ) -> bool:
+        """True if ``weapon`` (a melee weapon) can reach ``target`` with clear LoE."""
+        if not has_line_of_effect_cells(
+            self._grid, attacker.occupied_cells(), target.occupied_cells()
+        ):
+            return False
+        dist_ft = self.creature_distance(attacker, target) * _SQUARE_FT
+        effective_reach_ft = _effective_reach_ft(attacker, weapon)
+        if weapon.reach_ft > _SQUARE_FT:
+            return _SQUARE_FT < dist_ft <= effective_reach_ft
+        return dist_ft <= effective_reach_ft
+
     def _step5(self, state: CombatantState, target: CombatantState) -> None:
         if state.moved_this_turn:
             return