Add weather rules and streamline setup

src/rules-scoring.ts

@@ -28,6 +28,48 @@ function getLeafCounts(state: GameState) {
   return counts;
 }
 
+function getColumnPresence(state: GameState, column: number) {
+  const owners = new Set<PlayerId>();
+
+  for (let row = 0; row < state.config.rows; row += 1) {
+    const ownerId = state.nodes.get(keyFor(row, column))?.ownerId;
+    if (ownerId !== undefined) {
+      owners.add(ownerId);
+    }
+  }
+
+  return [...owners];
+}
+
+function applyColumnBaseEnergy(state: GameState, scores: number[], ownerId: PlayerId, playersPresent: PlayerId[]) {
+  const contested = playersPresent.length > 1;
+
+  if (!contested) {
+    scores[ownerId] += 1;
+    return;
+  }
+
+  if (state.activeRoundEffects.includes("stalemate")) {
+    return;
+  }
+
+  if (state.activeRoundEffects.includes("split_light")) {
+    playersPresent.forEach((playerId) => {
+      scores[playerId] += 0.5;
+    });
+    return;
+  }
+
+  if (state.activeRoundEffects.includes("shared_light")) {
+    playersPresent.forEach((playerId) => {
+      scores[playerId] += 1;
+    });
+    return;
+  }
+
+  scores[ownerId] += 1;
+}
+
 function applyWeatherEffects(state: GameState, scores: number[], energySimulation: EnergySimulation) {
   if (state.activeRoundEffects.length === 0) {
     return;
@@ -132,6 +174,7 @@ export function buildEnergySimulation(state: GameState): EnergySimulation {
         terminalRow: state.config.rows - 1,
         intercepted: false,
         ownerId: null,
+        playersPresent: [],
         hitNode: null,
         rootKey: null,
         branchNodes: [],
@@ -142,6 +185,7 @@ export function buildEnergySimulation(state: GameState): EnergySimulation {
 
     const hitNode = parseKey(hitNodeKey);
     const ownerId = state.nodes.get(hitNodeKey)?.ownerId as PlayerId;
+    const playersPresent = getColumnPresence(state, column);
     const branchNodes = [hitNode];
     const branchEdges = [];
     let cursor = hitNodeKey;
@@ -153,12 +197,13 @@ export function buildEnergySimulation(state: GameState): EnergySimulation {
       cursor = parentKey;
     }
 
-    scores[ownerId] += 1;
+    applyColumnBaseEnergy(state, scores, ownerId, playersPresent);
     columns.push({
       column,
       terminalRow: hitNode.row,
       intercepted: true,
       ownerId,
+      playersPresent,
       hitNode,
       rootKey: cursor,
       branchNodes,