#!/bin/bash

declare DEBUG=0
declare HELP=0
declare EDITOR=0
declare FORCE=0
declare IMPORT=0
declare ERASEIMPORT=0
declare WORKDIR="$(dirname $(readlink -f $0))"
declare GODOT_SRC="https://downloads.tuxfamily.org/godotengine/4.1.3/Godot_v4.1.3-stable_linux.x86_64.zip"
declare OUTZIP="$WORKDIR/$(basename $GODOT_SRC)"
declare CLIENTDIR="$WORKDIR/client"
declare OPTION=""
declare NEWPRG=0
declare DISABLEAUTODETECTCARD=0

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 [[ $FORCE -eq 0 && -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 [ $? -eq 0 ]
  then
    fileout=$(unzip -Z1 $compressed_file)
    if [[ $FORCE -eq 0 && -f $fileout ]]
    then
       echo $fileout
       return 0
    fi
    unzip -u $compressed_file -d $WORKDIR 1>&2
    if [ $? -eq 0 ]
    then
      msg_info "Uncompressed GODOT"
      echo $fileout
      NEWPRG=1
      return 0
    fi
  fi
  msg_error "Impossible to extract"
  exit 2
}


while getopts hdeo:s:fix flag
do
    case "${flag}" in
        h) HELP=1;;
        d) DEBUG=1;;
        e) EDITOR=1;;
        o) OUTZIP=${OPTARG};;
        s) GODOT_SRC=${OPTARG};;
        f) FORCE=1;;
        i) IMPORT=1;;
        x) ERASEIMPORT=1;;
        y) DISABLEAUTODETECTCARD=1;;
        *) 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
     -f : force download & uncompress
     -i : force import data
     -x : erase import data
     -y : Disable auto detect host (OS/CPU/GPU)
     -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 [ $NEWPRG -ne 0 ]
then
  echo "--- New program detected"
  ERASEIMPORT=1
  IMPORT=1
elif [ $DISABLEAUTODETECTCARD -eq 0 ]
then
  echo "--- Check host"
  $WORKDIR/$EXE --script precheck.gd > $WORKDIR/.current_version.tmp
  if [ -f $WORKDIR/.current_version ]
  then
     diff $WORKDIR/.current_version.tmp $WORKDIR/.current_version >/dev/null 
     if [ $? -ne 0 ]
     then
       ERASEIMPORT=1
       IMPORT=1
       mv $WORKDIR/.current_version.tmp $WORKDIR/.current_version
     else
       rm $WORKDIR/.current_version.tmp
     fi
  else
    ERASEIMPORT=1
    IMPORT=1
    mv $WORKDIR/.current_version.tmp $WORKDIR/.current_version
  fi
fi

if [ $ERASEIMPORT -ne 0 ]
then
  echo "--- Erase imported data"
  rm -f $WORKDIR/.godot/imported/*
fi

if [[ ($IMPORT -ne 0) || (! -d $WORKDIR/.godot) ]]
then
  echo "--- Launch import (please wait)"
  $WORKDIR/$EXE  --editor --quit
  echo "--- Import finished"
fi

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

cd $CLIENTDIR
$WORKDIR/$EXE $OPTION

msg_info "End"