#!/bin/bash
#
# Stage the selected file to git bare repo
#
# @params
# Globals
#   ${mydir}: string, current directory of the executing script
#   ${new_file}: new file path to stage
#   ${new_folder}: new folder to stage
#   ${stage_file}: changed file to stage

set -e

mydir="${0%/*}"
source "${mydir}"/../helper/search_file
source "${mydir}"/../helper/set_variable

function usage() {
  echo -e "Usage: dotbare fadd [-h] [-f] [-d] ...\n"
  echo -e "Stage the selected file to the dotfile gitbare repo"
  echo -e "Press escape to stop staging file\n"
  echo -e "optional arguments:"
  echo -e "  -h\t\tshow this help message and exit"
  echo -e "  -f\t\tselect a file in current directory and stage it"
  echo -e "  -d\t\tselect a entire folder to stage"
}

function stage_file() {
  local file=$1
  if [[ -z "${file}" ]]
  then
    exit 0
  else
    /usr/bin/git --git-dir="${DOTBARE_DIR}" --work-tree="${DOTBARE_TREE}" add "${file}"
    echo "${file} staged successfully"
  fi
}

new_file=''
new_folder=''

while getopts ":fhd" opt
do
  case "$opt" in
    f)
      new_file=$(search_file 'f')
      [[ -z "${new_file}" ]] && exit 1
      break
      ;;
    h)
      usage
      exit 0
      ;;
    d)
      new_folder=$(search_file 'd')
      [[ -z "${new_folder}" ]] && exit 1
      break
      ;;
    *) 
      echo "Invalid option: ${OPTARG}" >&2
      usage
      exit 1
      ;;
  esac
done

if [[ -n "${new_file}" ]]; then
  while IFS= read -r line; do
    stage_file "${line}"
  done <<< "${new_file}"
elif [[ -n "${new_folder}" ]]; then
  while IFS= read -r line; do
    stage_file "${line}"
  done <<< "${new_folder}"
else
  selected_files=$(/usr/bin/git --git-dir="${DOTBARE_DIR}" --work-tree="${DOTBARE_TREE}" diff --name-status | \
    awk '{print "\033[31m" $1 " " $2}' | \
    fzf --header='select files to stage' --multi --preview "echo {} | awk '{print \$2}' | \
      xargs -I __ /usr/bin/git --git-dir=${DOTBARE_DIR} --work-tree=${DOTBARE_TREE} diff --color=always ${DOTBARE_TREE}/__" | \
    awk -v home="${DOTBARE_TREE}" '{print home "/" $2}')
  while IFS= read -r line; do
    stage_file "${line}"
  done <<< "${selected_files}"
fi