#!/usr/bin/env bash

confirm() {
  while [ 1 ]; do
    read -p "$1" -n 1 -r
    echo
    if [[ "$REPLY" =~ ^[Yy] ]]; then
      return 0
    elif [[ "$REPLY" =~ ^[Nn] ]]; then
      return 1
    fi
  done
}

remove() {
  echo "Remove $1"
  rm -f "$1"
}

remove_line() {
  src=$(readlink "$1")
  if [ $? -eq 0 ]; then
    echo "Remove from $1 ($src):"
  else
    src=$1
    echo "Remove from $1:"
  fi

  shift
  line_no=1
  match=0
  while [ -n "$1" ]; do
    line=$(sed -n "$line_no,\$p" "$src" | \grep -m1 -nF "$1")
    if [ $? -ne 0 ]; then
      shift
      line_no=1
      continue
    fi
    line_no=$(( $(sed 's/:.*//' <<< "$line") + line_no - 1 ))
    content=$(sed 's/^[0-9]*://' <<< "$line")
    match=1
    echo    "  - Line #$line_no: $content"
    [ "$content" = "$1" ] || confirm "    - Remove (y/n) ? "
    if [ $? -eq 0 ]; then
      awk -v n=$line_no 'NR == n {next} {print}' "$src" > "$src.bak" &&
        mv "$src.bak" "$src" || break
      echo  "      - Removed"
    else
      echo  "      - Skipped"
      line_no=$(( line_no + 1 ))
    fi
  done
  [ $match -eq 0 ] && echo "  - Nothing found"
  echo
}

for shell in bash zsh; do
  remove ~/.fzf.${shell}
  remove_line ~/.${shell}rc \
    "[ -f ~/.fzf.${shell} ] && source ~/.fzf.${shell}" \
    "source ~/.fzf.${shell}"
done

bind_file=~/.config/fish/functions/fish_user_key_bindings.fish
if [ -f "$bind_file" ]; then
  remove_line "$bind_file" "fzf_key_bindings"
fi

if [ -d ~/.config/fish/functions ]; then
  remove ~/.config/fish/functions/fzf.fish

  if [ "$(ls -A ~/.config/fish/functions)" ]; then
    echo "Can't delete non-empty directory: \"~/.config/fish/functions\""
  else
    rmdir ~/.config/fish/functions
  fi
fi