janken.bash

#!/bin/bash
set -eux

player_hand=$(
zenity --list \
  --title "あなたの手は？" \
  --column="手" \
  "グー" \
  "チョキ" \
  "パー"
)

cpu_candidates=("グー" "チョキ" "パー")
h=$((RANDOM % 3))
cpu_hand="${cpu_candidates[h]}"

if [[ "${player_hand}" = "${cpu_hand}" ]]
then
  zenity --error --text="あいこです"
else
  if [[ "${player_hand}" = "グー" && "${cpu_hand}" = "チョキ" ]] || [[ "${player_hand}" = "チョキ" && "${cpu_hand}" = "パー" ]] || [[ "${player_hand}" = "パー" && "${cpu_hand}" = "グー" ]]
  then
    zenity --info --text="あなたは${player_hand}、CPUは${cpu_hand}。あなたの勝ちです!"
  else
    zenity --warning --text="あなたは${player_hand}、CPUは${cpu_hand}。あなたの負けです..."
  fi
fi