#!/usr/bin/env bash

# Copyright 2021 Josh Holbrook
#
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at https://mozilla.org/MPL/2.0/.

set -e

DEBUG="${DEBUG:-}"

function log-info {
  if [ ! -z "${DEBUG}" ]; then
    echo "info: $1" 1>&2
  fi
}

function log-warn {
  echo "warn: $1" 1>&2
}

function log-error {
  echo "ERROR: $1" 1>&2
}

function log-help {
  log-info "Preview files in the terminal!"
  log-info ""
  log-info "USAGE:"
  log-info "  kbprev <path>"
}

log-info "Korben's Cool Babysitter's File Preview 🦜"
log-info "programmed while changing Korby Jr's diaper"
log-info "it worked if it ends with ok"

ARGS="$@"
FILE=$(IFS=, ; echo "${ARGS[*]}")

if [ -d "${FILE}" ]; then
  ls -l
  exit 0
elif [ ! -f "${FILE}" ]; then
  log-help
  log-error "not ok"
  exit 1
fi

EXTENSION="${FILE##*.}"

case $EXTENSION in 
  pdf)
    echo "# pdf file"
    if [ ! -z "$(command -v pdftotext)" ]; then
      pdftotext -layout -eol unix -nopgbrk "${FILE}" -
    fi
    ;;
  jpg|jpeg|gif|png)
    if [ ! -z "$(command -v viu)" ]; then
      viu "${FILE}"
    else
      echo "# image file"
    fi
    ;;
  *)
    if [ -z "$(command -v bat)" ]; then
      cat "${FILE}"
    else
      bat -f "${FILE}"
    fi
    ;;
esac

log-info "ok"
