# shellcheck shell=bash

fatal() {
  remainder=${*:2}
  if [ -z "$remainder" ]; then
    log "🛑" "${@}"
  else
    log "${@}"
  fi
  exit 1
}

log() {
  emoji=$1
  remainder=${*:2}
  if [ -z "${NO_EMOJI}" ]; then
    echo "[ ${0} ] ${*}"
  else
    # if remainder is empty that means no emoji was passed
    if [ -z "$remainder" ]; then
      echo "[ ${0} ] ${*}"
    else # emoji was passed, but we ignore it
      echo "[ ${0} ] ${remainder}"
    fi
  fi
}

debug() {
  message=$1
  if [ -z "${DOCKBOX_DEBUG}" ]; then
    return
  fi
  log "🐛" "${message}"
}

usage() {
  description=$1
  arg_names=$2
  pre_hook=$3
  post_hook=$4
  echo "usage: ${0} [-h] ${arg_names}"
  if [ -n "${description}" ]; then
    echo
    echo "DESCRIPTION"
    echo "    ${description}"
  fi
  if [ -n "${pre_hook}" ] || [ -n "${post_hook}" ]; then
    echo
    echo "HOOKS"
    if [ -n "${pre_hook}" ]; then
      echo "    ${pre_hook} - if present, called before the main action"
    fi
    if [ -n "${post_hook}" ]; then
      echo "    ${post_hook} - if present, called after the main action"
    fi
  fi
  exit 0
}

usage_on_help() {
  description=$1
  arg_names=$2
  pre_hook=$3
  post_hook=$4
  # These are the args passed to the invocation so this
  # function can determine if the user requested help
  cli_args=( "${@:5}" ) 

  for arg in "${cli_args[@]}"; do
    if [ "${arg}" = "-h" ] || [ "${arg}" = "--help" ]; then
      usage "${description}" "${arg_names}" "${pre_hook}" "${post_hook}"
    fi
  done
}

# Read user input into the variable 'INPUT'
#
# Args:
#
# [1] - an emoji to use for messages
# [2] - the message explaining what input is being requested
# [3] - a default value to use if no value is provided
#
# Respects NO_EMOJI when outputing messages to the user
user_input() {
  emoji=$1
  message=$2
  default=$3
  prompt=$4

  if [ -z "$message" ]; then
    echo "user_input requires a message"
    exit 1
  fi

  INPUT=

  if [ -z "${prompt}" ]; then
    prompt=$(log "${emoji}" "Value: ")
    if [ -n "${default}" ]; then
      prompt=$(log "${emoji}" "Value (or hit return to use '${default}'): ")
    fi
  fi

  while [ -z "${INPUT}" ]; do

    log "$emoji" "$message"
    read -r -p "${prompt}" INPUT
    if [ -z "$INPUT" ]; then
      INPUT=$default
    fi
    if [ -z "$INPUT" ]; then
      log "😶", "You must provide a value"
    fi
  done
}

user_confirm() {
  user_input "$1" "$2" "$3" "y/n> "
}

require_not_exist() {
  file=$1
  message=$2
  if [ -e "${file}" ]; then
    fatal "$message"
  fi
}
require_exist() {
  file=$1
  message=$2
  if [ ! -e "${file}" ]; then
    fatal "$message"
  fi
}

require_command() {
  command_name=$1
  if ! command -v "${command_name}" >/dev/null 2>&1; then
    fatal "Command '${command_name}' not found - it is required for this script to run"
  fi
}

# vim: ft=bash