must build port before destroyer

src/core/execution/NukeExecution.ts

@@ -1,4 +1,4 @@
-import { Cell, Execution, Items, MutableGame, MutablePlayer, PlayerID, Tile } from "../game/Game";
+import { Cell, Execution, BuildItems, MutableGame, MutablePlayer, PlayerID, Tile } from "../game/Game";
 import { PseudoRandom } from "../PseudoRandom";
 import { bfs, dist, euclideanDist, manhattanDist } from "../Util";
 
@@ -26,12 +26,12 @@ export class NukeExecution implements Execution {
     }
 
     tick(ticks: number): void {
-        if (this.sender.gold() < Items.Nuke.cost) {
+        if (this.sender.gold() < BuildItems.Nuke.cost) {
             console.warn(`player ${this.sender} insufficient gold for nuke`)
             this.active = false
             return
         }
-        this.sender.removeGold(Items.Nuke.cost)
+        this.sender.removeGold(BuildItems.Nuke.cost)
 
         const rand = new PseudoRandom(this.mg.ticks())
         const tile = this.mg.tile(this.cell)

src/core/game/Game.ts

@@ -26,19 +26,22 @@ export enum GameMap {
 }
 
 export enum UnitType {
-    TransportShip,
-    Destroyer,
-    Port
+    TransportShip = "Transport",
+    Destroyer = "Destroyer",
+    Port = "Port",
+    Nuke = "Nuke",
 }
 
 export class Item {
-    constructor(public readonly name: string, public readonly cost: Gold) { }
+    constructor(public readonly type: UnitType,
+        public readonly cost: Gold
+    ) { }
 }
 
-export const Items = {
-    Nuke: new Item("Nuke", 1_000_000),
-    Destroyer: new Item("Destroyer", 10),
-    Port: new Item("Port", 0)
+export const BuildItems = {
+    Nuke: new Item(UnitType.Nuke, 1_000_000),
+    Destroyer: new Item(UnitType.Destroyer, 10),
+    Port: new Item(UnitType.Port, 0)
 } as const;
 
 export class Nation {