#!/usr/bin/env bash

# klevstul :: 25.04

this_file_name=`basename "$0"`


if [ $# -lt 2 ]; then
    echo "error: path to file is missing."
    echo "usage: '$this_file_name [callback] [input_array]'"
    exit 1
fi

sync_dir_sym=/home/${USER}/syncDir
syncdir_env_var=SYNCDIR_${HOSTNAME}
sync_dir=${!syncdir_env_var} # '!' to use the name and not the value
cwd=$(pwd)
callback=$1

# echo
# echo ">>> ${this_file_name} <<<"
# echo
# echo "DEBUG: debugging values:"
# echo "DEBUG: input args (all):    $@"
# echo "DEBUG: input args (one by one):"
# for i in "$@"; do echo "DEBUG:                   $i"; done;
# echo "DEBUG: sync_dir_sym:  ${sync_dir_sym}"
# echo "DEBUG: sync_dir:      ${sync_dir}"
# echo "DEBUG: cwd:           ${cwd}"
# echo "DEBUG: callback:      ${callback}"
# echo

# remove the first element (the callback) from $@
# https://stackoverflow.com/questions/2701400/remove-first-element-from-in-bash
shift


# loop through all files received as an parameter array
indexA=0
for input_file in "${@}"; do
    indexA=$((indexA+1))
    # echo "- - - - - - - - - -"
    # echo "DEBUG [indexA]: ${indexA}"
    # echo "DEBUG [\$@]: $@"
    # echo "DEBUG [input_file]: ${input_file[@]}"

    # lf file manager sends multiple files as one input parameter, split by with newlines
    # https://superuser.com/questions/284187/bash-iterating-over-lines-in-a-variable
    declare -a theArray
    # reset array | https://stackoverflow.com/questions/28737493/resetting-an-array-and-filling-it-with-values-in-a-bash-script
    theArray=()
    while read -r arrayLine
    do
        theArray+=("$arrayLine")
    done <<< "$input_file"

    # echo "DEBUG [theArray]: ${theArray[@]}"

    indexB=0
    for line in "${theArray[@]}"
    do
        indexB=$((indexB+1))
        # echo "    DEBUG [indexB]: ${indexB}"
        # echo "    DEBUG [line]: ${line}"

        # if input file has no path specified
        if [[ ${line} != *"/"* ]]; then
            line="${cwd}/${line}"
        fi

        # substitute parts of the old path, from using the symlink folder, to the non-symlink folder
        # example:
        #   "/home/poq/syncDir/0_downloads/topBanner.jpg" > "/home/poq/nextcloud/syncDir/0_downloads/topBanner.jpg"
        # new_file=${original_string//old_substring/new_substring}
        new_file=${line//$sync_dir_sym/$sync_dir}

        if [[ -f "${new_file}" ]] || [[ -d "${new_file}" ]] ; then
            echo "${callback} ${new_file}"
            ${callback} ${new_file}
        else
            echo "ERROR: file not found: \"${new_file}\""
        fi

    done

done