#!/bin/bash

declare DEBUG=0
declare HELP=0
declare EDITOR=0
declare WORKDIR="$(dirname $(readlink -f $0))"
declare GODOT_SRC="https://downloads.tuxfamily.org/godotengine/4.0/alpha1/Godot_v4.0-alpha1_linux.64.zip"
declare OUTZIP="$WORKDIR/Godot.zip"
declare OPTION=""

function msg_debug()
{
   if [ $DEBUG -ne 0 ]
   then
     echo "### DEBUG : $*" >&2
   fi
}

function msg_info()
{
   echo "--- INFO : $*" >&2
}

function msg_error()
{
   echo "*** ERROR : $*" >&2
}

function download()
{
  local package="$1"
  local out="$2"
  if [ -f $2 ]
  then
    return 0
  fi
  which curl 1>/dev/null 2>/dev/null
  if [ $? -eq 0 ]
  then
    curl -o $out $package
    if [ $? -eq 0 ]
    then
      msg_info "Package GODOT downloaded"
      return 0
    fi
  fi
  which wget 1>/dev/null 2>/dev/null
  if [ $? -eq 0 ]
  then
    wget $package -O $out
    if [ $? -eq 0 ]
    then
      msg_info "Package GODOT downloaded"
      return 0
    fi
  fi
  msg_error "Impossible to download"
  exit 2
}

function extract()
{
  local compressed_file="$1"
  which unzip 1>/dev/null 2>/dev/null
  if [ $? -eq 0 ]
  then
    unzip -u $compressed_file -d $WORKDIR 1>&2
    if [ $? -eq 0 ]
    then
      msg_info "Uncompressed GODOT"
      unzip -Z1 $compressed_file
      return 0
    fi
  fi
  msg_error "Impossible to extract"
  exit 2
}


while getopts hdeo:s: flag
do
    case "${flag}" in
        h) HELP=1;;
        d) DEBUG=1;;
        e) EDITOR=1;;
        o) OUTZIP=${OPTARG};;
        s) GODOT_SRC=${OPTARG};;
        *) HELP=1;;
    esac
done

if [[ $HELP -ne 0 ]]
then
   cat << EOF
$(basename $0) [Option] : Donwload Launch Godot
  Option:
     -h : Show help
     -d : Show debug message
     -e : Start Godot in editor mode
     -o <File> : target godot file (downloaded)
     -s <Url> : Url to download a specific godot version
EOF
  exit 1
fi

msg_info "Start"
msg_debug "WORKDIR:$WORKDIR OUTZIP:$OUTZIP GODOT_SRC:$GODOT_SRC"
download "$GODOT_SRC" "$OUTZIP"
EXE=$(extract "$OUTZIP")
msg_info "Prg:$EXE"

if [ $EDITOR -ne 0 ]
then
   OPTION="$OPTION -e"
fi

$WORKDIR/$EXE $OPTION


msg_info "End"