calculate average guesses and fix divide by 0 bug

wordle

@@ -23,7 +23,6 @@ declare -gr UP1=$'\e[1F'
 declare -gr HIDE_CURSOR=$'\e[?25l'
 declare -gr SHOW_CURSOR=$'\e[?25h'
 declare -gr GOHOME=$'\e[H'
-declare -gr DOWN1=$'\e[1E'
 declare -gr INDENT=$'\e[1C'
 
 function main() {
@@ -156,7 +155,6 @@ function set_options() {
           if [[ "${HM}" =~ ^[Yy]$ ]]; then
             HARD_MODE=1
 
-            declare SHM
             echo -en "${NEWLINE}"
             read -r -p "Do you want to enable strict hard mode [y/N]? " -n 1 HM
 
@@ -352,6 +350,7 @@ function reveal_row() {
 }
 
 function load_game() {
+  # shellcheck source=/dev/null
   source "${PROGRESS_FILE}"
 }
 
@@ -420,6 +419,21 @@ function update_stats() {
   [[ $WIN != 5 ]] && STREAK=0
   [[ $LONGEST_STREAK -lt $STREAK ]] && LONGEST_STREAK=$(( LONGEST_STREAK+1 ))
 
+  declare num=0
+  declare den=0
+  for (( i=0; i<${#GAME_HIST[@]}; i++)); do
+    ((den += ${GAME_HIST[$i]}))
+    (( num += ${GAME_HIST[$i]}*(i+1) ))
+
+  done
+  if [[ "${den}" != 0 ]]; then
+    result=$(( (num * 100) / den ))
+    integer_part=$(( result / 100 ))
+    decimal_part=$(( result % 100 ))
+
+    AVERAGE="${integer_part}.${decimal_part}"
+  fi
+
   : > "${STATS_SOURCE}"
   {
     echo "GAMES_PLAYED=${GAMES_PLAYED}"
@@ -428,6 +442,7 @@ function update_stats() {
     echo "GAME_HIST=(${GAME_HIST[*]})"
     echo "STREAK=${STREAK}"
     echo "LONGEST_STREAK=${LONGEST_STREAK}"
+    echo "AVERAGE=${AVERAGE}"
   } >> "${STATS_SOURCE}"
 
   render_stats
@@ -436,10 +451,12 @@ function update_stats() {
 function create_stats() {
     { 
       echo "GAMES_PLAYED=0"
-      echo -e "WINS=0\\nLOSSES=0"
+      echo "WINS=0"
+      echo "LOSSES=0"
       echo "GAME_HIST=(0 0 0 0 0 0)"
       echo "STREAK=0"
       echo "LONGEST_STREAK=0"
+      echo "AVERAGE=0"
     }  >> "${STATS_SOURCE}"
 }
 
@@ -458,7 +475,11 @@ function render_stats() {
 
   for (( i=0; i<HEIGHT; i++ )); do
     value="${GAME_HIST[$i]}"
-    bar_length=$(( value * max_width / highest ))
+    if [[ "${highest}" == 0 ]]; then
+      bar_length=0
+    else
+      bar_length=$(( value * max_width / highest ))
+    fi
     
     bar='▇'
 
@@ -484,6 +505,7 @@ function render_stats() {
     echo "Losses: ${LOSSES}"
     echo "Streak: ${STREAK}"
     echo "Longest Streak: ${LONGEST_STREAK}"
+    echo "Average: ${AVERAGE}"
   } >> "${STATS_FILE}"
 }