#!/usr/bin/env sh
#
# Adds call to gitignore.sh api to automatically
# generate a .gitignore file with the individual arguments
# passed in included as ignored packages.
#
# Pass in -f as first argument to save the file as .gitignore
# in the current directory in addition to printing to stdout.
# Will *overwrite* any previous .gitignore file that exists in
# current directory.
#
# When called without arguments will load all possible arguments
# as fzf searchable list if fzf is in path.
#
# Enables completion for zsh in git/.config/shell/zshrc.d/_gitignore_completions.zsh

__get_items() {
  if [ "$1" = "" ]; then
    echo "gitignore definition generation needs at least one argument."
    exit 1
  fi
  if [ "$savetofile" = "true" ]; then
    __call_url "$@" >>.gitignore
  else
    __call_url "$@"
  fi
}

__call_url() {
  IFS=","
  curl -L -s https://www.gitignore.io/api/"$*"
}

gitignore() {
  if [ "$1" = "-h" ] || [ "$1" = "--help" ]; then
    usage
    exit 0
  # just print to stdout or save locally?
  elif [ "$1" = "-f" ] || [ "$1" = "--file" ]; then
    savetofile=true
    shift
  fi

  IFS=","
  if [ "$#" -eq 0 ]; then
    if type fzf >/dev/null 2>&1; then
      for item in $(__get_items list); do
        echo "$item"
      done | fzf --multi --ansi | paste -s -d "," - |
        { read -r result && __get_items "$result"; }
    else
      usage
    fi
  else
    __get_items "$@"
  fi
}

usage() {
  printf "%s\n" \
    "" \
    " gitignore     Quickly generate a gitignore definition." \
    "" \
    " Usage: gitignore [-h] [vim] [linux] [javascript] [...]" \
    "" \
    " Arguments:" \
    "" \
    "     -h | --help       Print out this help." \
    "" \
    "     -f | --file       Append gitignore definition to .gitignore file" \
    "                       instead of stdout." \
    "" \
    "     Arguments will be passed along to gitignore.io for parsing and " \
    "     gitignore definition generation. By default only prints to stdout." \
    "" \
    ""
}

gitignore "$@"
