feat: allow loading game from text file

1 files changed, 18 insertions, 9 deletions

diff --git a/src/main.c b/src/main.c
index 3468405..78fd66b 100644
--- a/src/main.c
+++ b/src/main.c
@@ -174,14 +174,14 @@ void index_to_notation(int index, char notation[2]) {
   notation[1] = (index >> 4) + '1';
 }
 
-Move input_move() {
-  Move move;
+Move input_move(FILE* stream) {
+  Move move = { 0, 0, 0 };
   char file;
   int rank;
   char file_destination;
   int rank_destination;
 
-  scanf(" %c%i %c%i", &file, &rank, &file_destination, &rank_destination);
+  fscanf(stream, " %c%i%c%i", &file, &rank, &file_destination, &rank_destination);
 
   move.origin = notation_to_index(file, rank);
   move.destination = notation_to_index(file_destination, rank_destination);
@@ -630,7 +630,8 @@ Move minimax_search(int* board, int color, int depth, int alpha, int beta, int*
 }
 
 int main() {
-  FILE* record;
+  FILE* record = fopen(FILENAME, "r");
+  int is_reading = 1;
 
   int board[128];
   parse_FEN(DEFAULT_FEN, board);
@@ -656,9 +657,15 @@ int main() {
     printf("##### Ply %i #####\n", ply);
     printf("Current evaluation: %.2f\n", (double)evaluate_position(board, 0, WHITE) / 10);
 
-    if (color == PLAYER) {
+    if (is_reading) {
+      move = input_move(record);
+      if (move.origin == move.destination) { // EOF
+        fclose(record);
+        is_reading = 0;
+      }
+    } else if (color == PLAYER) {
       printf("Enter a move for %s:\n", COLORS[color]);
-      move = input_move();
+      move = input_move(stdin);
       index_to_notation(move.origin, move_in_notation);
       index_to_notation(move.destination, move_in_notation + 2);
     } else {
@@ -687,9 +694,11 @@ int main() {
       make_move(move, board);
       print_board(board);
 
-      record = fopen("record.txt", "a");
-      fprintf(record, "%s ", move_in_notation);
-      fclose(record);
+      if (!is_reading) {
+        record = fopen("record.txt", "a");
+        fprintf(record, "%s ", move_in_notation);
+        fclose(record);
+      }
 
       ply++;
     }