Have trains produce more gold (#1759)

## Description:

During the play test, trains did not produce enough gold. So increase
gold, and give 4x bonus for allies.

## Please complete the following:

- [x] I have added screenshots for all UI updates
- [x] I process any text displayed to the user through translateText()
and I've added it to the en.json file
- [x] I have added relevant tests to the test directory
- [x] I confirm I have thoroughly tested these changes and take full
responsibility for any bugs introduced
- [x] I have read and accepted the CLA agreement (only required once).

## Please put your Discord username so you can be contacted if a bug or
regression is found:

evan

src/core/configuration/Config.ts

@@ -130,7 +130,7 @@ export interface Config {
   unitInfo(type: UnitType): UnitInfo;
   tradeShipGold(dist: number, numPorts: number): Gold;
   tradeShipSpawnRate(numberOfPorts: number): number;
-  trainGold(): Gold;
+  trainGold(isFriendly: boolean): Gold;
   trainSpawnRate(numberOfStations: number): number;
   trainStationMinRange(): number;
   trainStationMaxRange(): number;

src/core/configuration/DefaultConfig.ts

@@ -328,9 +328,10 @@ export class DefaultConfig implements Config {
   trainSpawnRate(numberOfStations: number): number {
     return Math.min(1400, Math.round(40 * Math.pow(numberOfStations, 0.5)));
   }
-  trainGold(): Gold {
-    return BigInt(4_000);
+  trainGold(isFriendly: boolean): Gold {
+    return isFriendly ? 100_000n : 25_000n;
   }
+
   trainStationMinRange(): number {
     return 15;
   }

src/core/game/TrainStation.ts

@@ -18,19 +18,18 @@ interface TrainStopHandler {
  * Behavior to be defined
  */
 class CityStopHandler implements TrainStopHandler {
-  private factor: bigint = BigInt(2);
   onStop(
     mg: Game,
     station: TrainStation,
     trainExecution: TrainExecution,
   ): void {
     const level = BigInt(station.unit.level() + 1);
-    let goldBonus = (mg.config().trainGold() * level) / this.factor;
     const stationOwner = station.unit.owner();
     const trainOwner = trainExecution.owner();
+    const isFriendly = stationOwner.isFriendly(trainOwner);
+    const goldBonus = mg.config().trainGold(isFriendly) * level;
     // Share revenue with the station owner if it's not the current player
-    if (stationOwner.isFriendly(trainOwner)) {
-      goldBonus += BigInt(1_000); // Bonus for everybody when trading with an ally!
+    if (isFriendly) {
       stationOwner.addGold(goldBonus, station.tile());
     }
     trainOwner.addGold(goldBonus, station.tile());
@@ -38,7 +37,6 @@ class CityStopHandler implements TrainStopHandler {
 }
 
 class PortStopHandler implements TrainStopHandler {
-  private factor: bigint = BigInt(2);
   constructor(private random: PseudoRandom) {}
   onStop(
     mg: Game,
@@ -46,12 +44,12 @@ class PortStopHandler implements TrainStopHandler {
     trainExecution: TrainExecution,
   ): void {
     const level = BigInt(station.unit.level() + 1);
-    let goldBonus = (mg.config().trainGold() * level) / this.factor;
     const stationOwner = station.unit.owner();
     const trainOwner = trainExecution.owner();
-    // Share revenue with the station owner if it's not the current player
-    if (stationOwner.isFriendly(trainOwner)) {
-      goldBonus += BigInt(1_000); // Bonus for everybody when trading with an ally!
+    const isFriendly = stationOwner.isFriendly(trainOwner);
+    const goldBonus = mg.config().trainGold(isFriendly) * level;
+
+    if (isFriendly) {
       stationOwner.addGold(goldBonus, station.tile());
     }
     trainOwner.addGold(goldBonus, station.tile());
@@ -59,18 +57,17 @@ class PortStopHandler implements TrainStopHandler {
 }
 
 class FactoryStopHandler implements TrainStopHandler {
-  private factor: bigint = BigInt(2);
   onStop(
     mg: Game,
     station: TrainStation,
     trainExecution: TrainExecution,
   ): void {
-    let goldBonus = mg.config().trainGold();
     const stationOwner = station.unit.owner();
     const trainOwner = trainExecution.owner();
+    const isFriendly = stationOwner.isFriendly(trainOwner);
+    const goldBonus = mg.config().trainGold(isFriendly);
     // Share revenue with the station owner if it's not the current player
-    if (stationOwner.isFriendly(trainOwner)) {
-      goldBonus += BigInt(1_000); // Bonus for everybody when trading with an ally!
+    if (isFriendly) {
       stationOwner.addGold(goldBonus, station.tile());
     }
     trainOwner.addGold(goldBonus, station.tile());

tests/core/game/TrainStation.test.ts

@@ -16,7 +16,8 @@ describe("TrainStation", () => {
     game = {
       ticks: jest.fn().mockReturnValue(123),
       config: jest.fn().mockReturnValue({
-        trainGold: () => BigInt(4000),
+        trainGold: (isFriendly: boolean) =>
+          isFriendly ? BigInt(1000) : BigInt(500),
       }),
       addUpdate: jest.fn(),
       addExecution: jest.fn(),
@@ -50,7 +51,7 @@ describe("TrainStation", () => {
 
     station.onTrainStop(trainExecution);
 
-    expect(unit.owner().addGold).toHaveBeenCalledWith(4000n, unit.tile());
+    expect(unit.owner().addGold).toHaveBeenCalledWith(1000n, unit.tile());
   });
 
   it("handles allied trade", () => {
@@ -60,9 +61,9 @@ describe("TrainStation", () => {
 
     station.onTrainStop(trainExecution);
 
-    expect(unit.owner().addGold).toHaveBeenCalledWith(5000n, unit.tile());
+    expect(unit.owner().addGold).toHaveBeenCalledWith(2000n, unit.tile());
     expect(trainExecution.owner().addGold).toHaveBeenCalledWith(
-      5000n,
+      2000n,
       unit.tile(),
     );
   });