#!/bin/bash

function lines_2_str () {
  [[ ! -f "$1" ]] && return 1
  local str=''
  # echo the lines: $lines >&2
  # lines="$(cat "$1")"
  while read line; do
  [[ "$line" =~ ^[[:space:]]*# ]] && continue
    # echo line: "${line}" >&2
    str="$str ${line}"
   # echo str: $str >&2
done < $1
  # for line in $lines ; do
  #    str+='"'$line'" '
  # done
  echo $str
  # set +o noglob
  return 0
}

function super_find () {
  # echo super_find $@ >&2
#  USAGE
# all option arguments that contain globs/wildcards must be quoted to avoid expansion
# f sets path and file excludes from a supplied file path
# all lines ending in /  will be treated as directory names to ignore, otherwise files
# p option explictly excludes paths(directories)
# d option sets the directory depth which is current directy by default, 0 is all
# x excitly excludes file globs as a string
# n inclucdes only file globs otherwise it's all except .files
# if no directory is given it will attempt to source the present working directory
# example:
# source_dir -p "archive" -x '"*.off" "*.md"'  -d 0 # $DIR/$SUBDIR
declare OPTION
declare OPTARG
declare OPTIND
local EXCLUDE_FILE
local PATHS
local NAMES
local ENAMES
local DEPTH=1
local VERBOSE=0

while getopts 'p:d:e:n:f:' OPTION; do
case "$OPTION" in
  f)
    EXCLUDE_FILE=$OPTARG
    # echo EXCLUDE FILE $EXCLUDE_FILE >&2
    ;;
  p)
    # PATHS=("$OPTARG")
    IFS=',' read -r -a PATHS <<< "$OPTARG"
    # echo EXCLUDING THESE PATHS ${PATHS[*]}
    ;;
  e)
    IFS=',' read -r -a ENAMES <<< "${OPTARG}"
    # echo EXCLUDING THESE FILE NAMES ${ENAMES[*]}
    ;;
  n)
    # NAMES=("$OPTARG")
    IFS=',' read -r -a NAMES <<< "${OPTARG}"
    # echo INCLUDING ONLY THESE FILE NAMES ${NAMES[*]}
    ;;
  d)
    DEPTH=$OPTARG
    # echo "SOURCING TO DEPTH (0=any)" "$DEPTH"
    ;;
  *)
    echo unknown option $OPTION
    ;;
esac
done

shift $(( OPTIND - 1 ))

local DIR
DIR="$*"
if [ ! "$DIR" ]; then
  if [ -v PS1 ]; then
  echo no directory to source provided
  echo sourcing present working directory $(pwd)
  read -p "Do you want to continue? " -n 1 -r
  [[ $REPLY =~ ^[Yy]$ ]] && DIR=$(pwd) || return 1
  else
    return 1
  fi
fi

[ ! -d "$DIR" ] && echo " directory $DIR does not exist, aborting" && return 1

# echo dir $DIR

local FIND
FIND="find $DIR"
FIND+=$([ ! $DEPTH == 0 ] && echo " -maxdepth $DEPTH ")
# ignore all .name and .path by default
FIND+=" -type f ! -path \"*/.*/*\" ! -name \".*\" "

local name
local path

if [[ -f $EXCLUDE_FILE ]]; then
  local ignores=$(lines_2_str "$EXCLUDE_FILE")
  # echo ignores: $ignores >&2
  for exclude in $ignores ; do
    # echo exclude: ${exclude} >&2
    [[ "$exclude" == */ ]] && PATHS+=("${exclude::-1}") || ENAMES+=("$exclude")
  done
fi

# echo paths ${PATHS[@]} >&2
# echo exclude names ${ENAMES[@]} >&2

if [[ ${PATHS[0]} ]]; then
  for path in ${PATHS[@]}; do
     # echo excluding $path
     FIND+=$(echo ' ! -path "*/'$path'/*"')
  done
fi

if [[ ${ENAMES[0]} ]]; then
  for name in ${ENAMES[@]}; do
     # echo excluding name $name
     FIND+=$(echo ' ! -name "'${name}'"')
  done
fi

if [[ ${NAMES[0]} ]]; then
  for name in ${NAMES[@]}; do
     # echo only finding $name
     FIND+=$(echo " -name ${name}")
  done
fi

# echo
# echo find dir: $DIR >&2
# echo find command: $FIND >&2

local FILES
FILES=$(eval $FIND | sort)
echo $FILES
return 0
}

source_dir () {
  # echo passed: $*
  local FILES
  FILES=$(super_find "$@")
  [[ $? -ne 0 ]] && return 1
    for f in $FILES; do
    # echo sourcing: $f
    source "$f"
  done

}