#!/bin/bash
#
# Author: Arnold Doray
# Date: 15 Nov 2023
# Compiles Smojo VM (Java) and runs any app.
# Requires Java 8+.
#
ARGS="${@:3}"
function missing(){
 if [ -z "$1" ]; then
   echo "Missing $2"
   exit 1
 fi
}
CURL=$(which curl)
missing "$CURL" "Curl"
JAVA=$(which java)
missing "$JAVA" "Java Runtime (java)"
JAVAC=$(which javac)
missing "$JAVAC" "Java Compiler (javac)"
JAR=$(which jar)
missing "$JAR" "Java Archiver (jar)"
function help(){
echo -ne "
Usage:
    -c                   -- to grab and compile the latest Java SmojoVM
    -r username/program  -- to run a program from a user.
    -h                   -- this help.
"
}
TEMP=.
function compile(){
   echo "javac=\"${JAVAC}\"" > smojo.txt
   echo "classpath=\"${TEMP}/smojo.jar\"" >> smojo.txt
   cd $TEMP
   URL=https://app.smojo.org/arnold/vm.java
   echo "Using: ${URL}"
   $CURL -k $URL > SmojoVM.java
   mkdir ./smojo
   rm ./smojo/*.class 2> /dev/null
   $JAVAC -d ./smojo SmojoVM.java
   $JAR cfe smojo.jar SmojoVM -C ./smojo .
   rm SmojoVM.java
   rm ./smojo/*.class 2> /dev/null
}
function run(){
   $JAVA -cp $TEMP/smojo.jar smojo.ai.SmojoVM https://app.smojo.org/$1.json $ARGS
}
# Check for smojo.jar and compile immediately if not found.
if [ ! -f $TEMP/smojo.jar ]; then
   compile
fi
while getopts chr:x: flag
do
   case "${flag}" in
       h) help;;
       c) compile;;
       r) run "$OPTARG";;
       x) compile "$OPTARG";;
   esac
done