From b2d9bb670aefb8b1c8511df73c0c02e7e008dafe Mon Sep 17 00:00:00 2001
From: Ilan Schemoul <ilanschemoul@gmail.com>
Date: Sun, 16 Mar 2025 02:22:14 +0100
Subject: [PATCH] nerf SAM (#258)

More costly (start at 1.5M), increase cost cap (4.5M), biggest timeout
(5s->10s), much lower chance to stop hydrogen (70%->10%), triple
construction time (10s->30s) otherwise it's trivial to build a SAM right
before a nuke hits
---
 src/core/configuration/DefaultConfig.ts    |  6 +++---
 src/core/execution/SAMLauncherExecution.ts |  2 +-
 src/core/execution/SAMMissileExecution.ts  | 14 +++++++++++++-
 3 files changed, 17 insertions(+), 5 deletions(-)

diff --git a/src/core/configuration/DefaultConfig.ts b/src/core/configuration/DefaultConfig.ts
index bcd7cbec1..8ad7f7fee 100644
--- a/src/core/configuration/DefaultConfig.ts
+++ b/src/core/configuration/DefaultConfig.ts
@@ -261,13 +261,13 @@ export class DefaultConfig implements Config {
             p.type() == PlayerType.Human && this.infiniteGold()
               ? 0
               : Math.min(
-                  1_000_000,
+                  1_500_000 * 3,
                   (p.unitsIncludingConstruction(UnitType.SAMLauncher).length +
                     1) *
-                    1_000_000,
+                    1_500_000,
                 ),
           territoryBound: true,
-          constructionDuration: this.instantBuild() ? 0 : 10 * 10,
+          constructionDuration: this.instantBuild() ? 0 : 30 * 10,
         };
       case UnitType.City:
         return {
diff --git a/src/core/execution/SAMLauncherExecution.ts b/src/core/execution/SAMLauncherExecution.ts
index c5403e292..cbf2f583a 100644
--- a/src/core/execution/SAMLauncherExecution.ts
+++ b/src/core/execution/SAMLauncherExecution.ts
@@ -22,7 +22,7 @@ export class SAMLauncherExecution implements Execution {
 
   private searchRange = 100;
 
-  private missileAttackRate = 50;
+  private missileAttackRate = 100; // 10 seconds
   private lastMissileAttack = 0;
 
   private pseudoRandom: PseudoRandom;
diff --git a/src/core/execution/SAMMissileExecution.ts b/src/core/execution/SAMMissileExecution.ts
index df7d22682..218f755f1 100644
--- a/src/core/execution/SAMMissileExecution.ts
+++ b/src/core/execution/SAMMissileExecution.ts
@@ -24,7 +24,9 @@ export class SAMMissileExecution implements Execution {
     private mg: Game,
     private pseudoRandom: number,
     private speed: number = 6,
+    // Regular atom bomb or warhead of MIRV
     private hittingChance: number = 0.75,
+    private hittingChanceHydrogen: number = 0.1,
   ) {}
 
   init(mg: Game, ticks: number): void {
@@ -61,7 +63,17 @@ export class SAMMissileExecution implements Execution {
       switch (result.type) {
         case PathFindResultType.Completed:
           this.active = false;
-          if (this.pseudoRandom < this.hittingChance) {
+          let hit = false;
+          if (
+            this.target.type() == UnitType.HydrogenBomb &&
+            this.pseudoRandom < this.hittingChanceHydrogen
+          ) {
+            hit = true;
+          } else if (this.pseudoRandom < this.hittingChance) {
+            hit = true;
+          }
+
+          if (hit) {
             this.target.delete();
 
             this.mg.displayMessage(