From 713cc937218fd1f0e4aacaea601dd1a8121a216e Mon Sep 17 00:00:00 2001
From: Jerry Jiang <jerryjiang1128@gmail.com>
Date: Tue, 31 Mar 2020 23:10:47 -0700
Subject: [PATCH] Add ability for a debug start.

---
 .../com/tpcstld/twozerogame/DebugTools.java   | 56 +++++++++++++++++++
 .../com/tpcstld/twozerogame/MainGame.java     | 11 +++-
 2 files changed, 66 insertions(+), 1 deletion(-)
 create mode 100644 2048/base/src/main/java/com/tpcstld/twozerogame/DebugTools.java

diff --git a/2048/base/src/main/java/com/tpcstld/twozerogame/DebugTools.java b/2048/base/src/main/java/com/tpcstld/twozerogame/DebugTools.java
new file mode 100644
index 0000000..1f7a594
--- /dev/null
+++ b/2048/base/src/main/java/com/tpcstld/twozerogame/DebugTools.java
@@ -0,0 +1,56 @@
+package com.tpcstld.twozerogame;
+
+import android.support.annotation.Nullable;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Tools and hooks for debugging.
+ *
+ * Note to self: when making a custom build, set the versionCode in
+ * installed/build.gradle to 1.
+ */
+class DebugTools {
+    private static final boolean DEBUG_ENABLED = false;
+
+    private static final int[][] PREMADE_MAP = {
+        {128, 256, 32768, 131072},
+        {8, 16, 0, 2},
+        {0, 0, 0, 2},
+        {0, 0, 0, 0},
+    };
+    private static final long STARTING_SCORE = 2529244L;
+
+    @Nullable
+    static List<Tile> generatePremadeMap() {
+        if (!DEBUG_ENABLED) {
+            return null;
+        }
+
+        if (PREMADE_MAP == null) {
+            return null;
+        }
+
+        List<Tile> result = new ArrayList<>();
+        for (int yy = 0; yy < PREMADE_MAP.length; yy++) {
+            for (int xx = 0; xx < PREMADE_MAP[0].length; xx++) {
+                if (PREMADE_MAP[yy][xx] == 0) {
+                    continue;
+                }
+
+                result.add(new Tile(xx, yy, PREMADE_MAP[yy][xx]));
+            }
+        }
+
+        return result;
+    }
+
+    static long getStartingScore() {
+        if (!DEBUG_ENABLED) {
+            return 0;
+        }
+
+        return STARTING_SCORE;
+    }
+}
diff --git a/2048/base/src/main/java/com/tpcstld/twozerogame/MainGame.java b/2048/base/src/main/java/com/tpcstld/twozerogame/MainGame.java
index 32ac437..949e52d 100644
--- a/2048/base/src/main/java/com/tpcstld/twozerogame/MainGame.java
+++ b/2048/base/src/main/java/com/tpcstld/twozerogame/MainGame.java
@@ -2,6 +2,7 @@
 
 import android.content.Context;
 import android.content.SharedPreferences;
+import android.os.Debug;
 import android.preference.PreferenceManager;
 import android.support.annotation.NonNull;
 
@@ -70,7 +71,7 @@ void newGame() {
             highScore = score;
             recordHighScore();
         }
-        score = 0;
+        score = DebugTools.getStartingScore();
         gameState = GAME_NORMAL;
         addStartTiles();
         mView.showHelp = firstRun();
@@ -80,6 +81,14 @@ void newGame() {
     }
 
     private void addStartTiles() {
+        List<Tile> debugTiles = DebugTools.generatePremadeMap();
+        if (debugTiles != null) {
+            for (Tile tile : debugTiles) {
+                this.spawnTile(tile);
+            }
+            return;
+        }
+
         int startTiles = 2;
         for (int xx = 0; xx < startTiles; xx++) {
             this.addRandomTile();