#!/bin/bash
#
# Entrypoint script should be pure bash.
#

# Debugging helpers:
#PS4=':${LINENO}+'  # Show line numbers
#set -x             # Trace commands

#
# Support arguments (this recommend but not required):
#   -f <file>               Execute file on host, print the result and exit
#   -c <command>            [Not recommended to use] Execute command on host, print the result and exit
#   -C <command in base64>  Execute command on host, print the result and exit
#   -v <level>              Verbose mode: 1 - verbose, 2 - super verbose
#   -e <NAME=B64> -e ...    Environement variables (B64 is base64 encoded string)
#   -b <BASE64> -b ...      Base64 encoded bash command
#   -H <HOME path>          HOME path. Will be $HOME on the host.
#   -X <XDG path>           XDG_* path (https://specifications.freedesktop.org/basedir-spec/basedir-spec-latest.html)
#

while getopts f:c:C:v:e:b:H:X: option
do
case "${option}"
in
f) EXECUTE_FILE=${OPTARG};;
c) EXECUTE_COMMAND=${OPTARG};;
C) EXECUTE_COMMAND_B64=${OPTARG};;
v) VERBOSE=${OPTARG};;
e) ENV+=("$OPTARG");;
b) EBASH+=("$OPTARG");;
H) HOMEPATH=${OPTARG};;
X) XDGPATH=${OPTARG};;
esac
done

if [[ $VERBOSE != '' ]]; then
  export XXH_VERBOSE=$VERBOSE
fi

for env in "${ENV[@]}"; do
  name="$( cut -d '=' -f 1 <<< "$env" )";
  val="$( cut -d '=' -f 2- <<< "$env" )";
  val=`echo $val | base64 -d`

  if [[ $XXH_VERBOSE == '1' || $XXH_VERBOSE == '2' ]]; then
    echo Environment variable "$env": name=$name, value=$val
  fi

  export $name="$val"
done

for eb in "${EBASH[@]}"; do
  bash_command=`echo $eb | base64 -d`

  if [[ $XXH_VERBOSE == '1' || $XXH_VERBOSE == '2' ]]; then
    echo Entrypoint bash execute: $bash_command
  fi
  eval $bash_command
done

## Example disabling option:
#if [[ $EXECUTE_COMMAND ]]; then
#  echo '<THIS> entrypoint is not support command execution.'
#  exit 1
#fi

## Example command:
if [[ $EXECUTE_COMMAND ]]; then
  EXECUTE_COMMAND=(-c "${EXECUTE_COMMAND}")
fi

if [[ $EXECUTE_COMMAND_B64 ]]; then
  EXECUTE_COMMAND=`echo $EXECUTE_COMMAND_B64 | base64 -d`
  if [[ $XXH_VERBOSE == '1' || $XXH_VERBOSE == '2' ]]; then
    echo Execute command base64: $EXECUTE_COMMAND_B64
    echo Execute command: $EXECUTE_COMMAND
  fi

  EXECUTE_COMMAND=(-c "${EXECUTE_COMMAND}")
fi


if [[ $EXECUTE_FILE ]]; then
  EXECUTE_COMMAND=""
fi

# Example of adding argument `-f` before
EXECUTE_FILE=`[ $EXECUTE_FILE ] && echo -n "-f $EXECUTE_FILE" || echo -n ""`


#
# Move to current directory
#
CURRENT_DIR="$(cd "$(dirname "$0")" && pwd)"
cd $CURRENT_DIR

export XXH_HOME=`readlink -f $CURRENT_DIR/../../../..`

#if [[ ! -d $XXH_HOME/.local/share/<yourshell> ]]; then
#  mkdir -p $XXH_HOME/.local/share/<yourshell>
#fi

if [[ $HOMEPATH != '' ]]; then
  homerealpath=`readlink -f $HOMEPATH`
  if [[ -d $homerealpath ]]; then
    export HOME=$homerealpath
  else
    echo "Home path not found: $homerealpath"
    echo "Set HOME to $XXH_HOME"
    export HOME=$XXH_HOME
  fi
else
  export HOME=$XXH_HOME
fi

if [[ $XDGPATH != '' ]]; then
  xdgrealpath=`readlink -f $XDGPATH`
  if [[ ! -d $xdgrealpath ]]; then
    echo "XDG path not found: $xdgrealpath"
    echo "Set XDG path to $XXH_HOME"
    export XDGPATH=$XXH_HOME
  fi
else
  export XDGPATH=$XXH_HOME
fi

export XDG_CONFIG_HOME=$XDGPATH/.config
export XDG_DATA_HOME=$XDGPATH/.local/share
export XDG_CACHE_HOME=$XDGPATH/.cache

#
# Init prerun plugins
#
for pluginrc_file in $(find $CURRENT_DIR/../../../plugins/xxh-plugin-*/build -type f -name '*prerun.sh' -printf '%f\t%p\n' 2>/dev/null | sort -k1 | cut -f2); do
  if [[ -f $pluginrc_file ]]; then
    if [[ $XXH_VERBOSE == '1' ]]; then
      echo Load plugin $pluginrc_file
    fi
    #cd $(dirname $pluginrc_file)
    source $pluginrc_file
  fi
done

#
# Run the portable shell
#
./your_portable_shell # $EXECUTE_FILE "${EXECUTE_COMMAND[@]}"