From 58fdd68496e369558dcba53361563dadae7e37a6 Mon Sep 17 00:00:00 2001
From: eug-vs <eugene@eug-vs.xyz>
Date: Mon, 11 Apr 2022 19:18:53 +0300
Subject: feat: return meeples home on structure completion

---
 src/structure.c | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

(limited to 'src/structure.c')

diff --git a/src/structure.c b/src/structure.c
index a3039e7..3a26d23 100644
--- a/src/structure.c
+++ b/src/structure.c
@@ -31,6 +31,36 @@ void refresh_structure_groups(BoardUnit* board) {
   }
 }
 
+void complete_structures(BoardUnit* board, int* available_meeples) {
+  int completed_structures[MAX_STRUCTURES];
+  for (int i = 0; i < MAX_STRUCTURES; i++) completed_structures[i] = 1;
+
+  /* zero-out incomplete structures */
+  for (int i = 0; i < BOARD_WIDTH * BOARD_WIDTH; i++) {
+    int index = translate_coordinate(i);
+    if (board[index].feature == EMPTY) {
+      for (int k = 0; k < 4; k++) {
+        int test_index = index + 2 * NEIGHBOR_INCREMENTS[k];
+        if (test_index < BOARD_UNITS) {
+          completed_structures[board[test_index].structure_group] = 0;
+        }
+      }
+    }
+  }
+
+  /* return meeples into player pools */
+  for (int structure_group = 0; structure_group < MAX_STRUCTURES; structure_group++) {
+    if (completed_structures[structure_group] == 1) {
+      for (int i = 0; i < BOARD_UNITS; i++) {
+        if (board[i].structure_group == structure_group && board[i].meeple) {
+          available_meeples[board[i].meeple - 1]++;
+          board[i].meeple = 0;
+        }
+      }
+    }
+  }
+}
+
 int evaluate_structure(int index, BoardUnit* board) {
   int value = 0;
 
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