#!/bin/bash

. /etc/profile

# -- Config & Setup --
# Destination file
if [[ -z "$1" ]] && [[ -z "$2" ]]; then
  echo "Usage: mapper.txt [gamecontrollerdb.txt] [controlfolder]"
  exit -1
fi

CONTROLLER_DB="$1"
controlfolder="$2"

#Scrub the CONTROLLER_DB file
echo "" > ${CONTROLLER_DB}

# Where the emulationstation configuration file is
ES_CONFIG="${HOME}/.config/emulationstation/es_input.cfg"

#Set layout via Emulation Station
ACTIVE_GAME=""
GAME="${ACTIVE_GAME##*/}"
CONTROLLER_LAYOUT=$(get_setting port_controller_layout ports "${GAME}")

#Default to nintendo if no value assigned
if [ ! -n "${CONTROLLER_LAYOUT}" ]; then
  CONTROLLER_LAYOUT="nintendo"
fi

scriptdir="controller_layout"

if [ ! -d "${controlfolder}/${scriptdir}" ]; then
    mkdir -p "${controlfolder}/${scriptdir}"
fi

echo -e "# Xbox Layout\nABUT=\"b\"\nBBUT=\"a\"\nXBUT=\"y\"\nYBUT=\"x\"" >  "${controlfolder}/${scriptdir}/xbox_layout.txt"
echo -e "# Nintendo Layout\nABUT=\"a\"\nBBUT=\"b\"\nXBUT=\"x\"\nYBUT=\"y\"" >  "${controlfolder}/${scriptdir}/nintendo_layout.txt"
if [[ ! -e "${controlfolder}/${scriptdir}/custom_layout.txt" ]]; then
  echo -e "# Custom Layout\nABUT=\"a\"\nBBUT=\"b\"\nXBUT=\"x\"\nYBUT=\"y\"" >  "${controlfolder}/${scriptdir}/custom_layout.txt"
fi

source "${controlfolder}/${scriptdir}/${CONTROLLER_LAYOUT}_layout.txt"

# -- Helper function --
# Map the actual button/hat/axis
function map {
  INPUT_NAME=$1
  TYPE=$2
  ID=$3
  VALUE=$4

  map_x_result=""
  case "${INPUT_NAME}" in
    "a")                TR_NAME="${ABUT}";;
    "b")                TR_NAME="${BBUT}";;
    "x")                TR_NAME="${XBUT}";;
    "y")                TR_NAME="${YBUT}";;
    "hotkeyenable")     TR_NAME="guide";;
    "up")               TR_NAME="dpup";;
    "down")             TR_NAME="dpdown";;
    "left")             TR_NAME="dpleft";;
    "right")            TR_NAME="dpright";;
    "leftshoulder")     TR_NAME="leftshoulder";;
    "leftthumb")        TR_NAME="leftstick";;
    "lefttrigger")      TR_NAME="lefttrigger";;
    "rightshoulder")    TR_NAME="rightshoulder";;
    "rightthumb")       TR_NAME="rightstick";;
    "righttrigger")     TR_NAME="righttrigger";;
    "select")           TR_NAME="back";;
    "start")            TR_NAME="start";;
    "leftanalogup")     TR_NAME="-lefty";;
    "leftanalogleft")   TR_NAME="-leftx";;
    "leftanalogdown")   TR_NAME="+lefty";;
    "leftanalogright")  TR_NAME="+leftx";;
    "rightanalogup")    TR_NAME="-righty";;
    "rightanalogleft")  TR_NAME="-rightx";;
    "rightanalogdown")  TR_NAME="+righty";;
    "rightanalogright") TR_NAME="+rightx";;
    *)
      echo "Invalid mapping ${INPUT_NAME}."
      return
      ;;
  esac

  case "${TYPE}" in
  "axis")
    if (( $VALUE < 0 )); then
      map_x_result="${TR_NAME}:${map_x_result}-a${ID},"
    else
      # Most (save for a few misbehaved children...) triggers are [0, 1] instead of [-1, 1]
      # Shitty workaround for an emulationstation issue
      if [[ $INPUT_NAME =~ .*"trigger" ]]; then
        map_x_result="${TR_NAME}:${map_x_result}a${ID},"
      else
        map_x_result="${TR_NAME}:${map_x_result}+a${ID},"
      fi
    fi
    ;;
  "button")
    map_x_result="${TR_NAME}:${map_x_result}b${ID},"
    ;;
  "hat")
    map_x_result="${TR_NAME}:${map_x_result}h${ID}.${VALUE},"
    ;;
  *)
    echo "Invalid entry ${TYPE}"
    ;;
  esac
}

function get_map_suffix {
  map_suffix="platform:Linux,"
}

function get_map_prefix {
  map_prefix="${GUID},${NAME},"
}

# query controllers mapped in emulationstation, ignore devices without a GUID
ES_QUERY="$(xmlstarlet sel -T -t -m "inputList/inputConfig[@deviceGUID!='']" -n -v "concat(@deviceName,';',@deviceGUID)" $ES_CONFIG)"
printf "# ${CONTROLLER_LAYOUT} layout\n" >> "${CONTROLLER_DB}"

echo "## ES Dev Mapper ##"
while IFS=";" read -r NAME GUID; do
  echo "$NAME :: $GUID"
  # Ignore keyboards
  if [[ "${GUID}" == -1 ]]; then
    continue
  fi

    # Query this specific GUID on the mappings
    MAPPING_CFG=$(xmlstarlet sel -T -t -m "//inputConfig[@deviceGUID = '${GUID}']/input" -n -v "concat(@name,';',@type,';',@id,';',@value)" $ES_CONFIG)

    MAPPING=""
    while IFS=";" read -r -e INPUT_NAME TYPE ID VALUE; do
      # Map the controller
      map "${INPUT_NAME}" "${TYPE}" "${ID}" "${VALUE}"

      # Only concatenate valid mappings
      if [[ ! -z ${map_x_result} ]]; then
        MAPPING="${MAPPING}${map_x_result}"
      fi
    done <<< ${MAPPING_CFG:1}

    get_map_prefix
    get_map_suffix
    if [[ ! -z "${MAPPING}" ]]; then
      echo "${map_prefix}${MAPPING}${map_suffix}" >> "${CONTROLLER_DB}"
    else
      echo "Failed to map anything."
    fi
done <<< ${ES_QUERY:1}

#Reset file for next run
sed -i '/^ACTIVE_GAME=/c\ACTIVE_GAME=""' /storage/.config/PortMaster/mapper.txt