#!/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

EDITOR="${EDITOR:-nano}"
DEBUG="${DEBUG:-}"

function log-debug {
  if [ ! -z "${DEBUG}" ]; then
    echo "debug: $1"
  fi
}

function log-info {
  echo "info:" "$@"
}

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

log-info "Korby Jr. The File/Url Opener 🦜"
log-info "programmed entirely while eating a spider plant"
log-info '"open up or else!"'
log-debug "it worked if it ends with ok"

function log-help {
  log-info "Open files and URLs with default and mime-appropriate XDG applications"
  log-info ""
  log-info "USAGE:"
  log-info "  kbopen <path-or-url>"
}

PATH_OR_URL="${1:-}"

if [ -z "${PATH_OR_URL}" ]; then
  log-help
  log-error "not ok"
  exit 1
fi

if [ ! -z "$(command -v open)" ]; then
  OPEN_CMD="open"
  log-debug "Found open"
elif [ ! -z "$(command -v gio)" ]; then
  OPEN_CMD="gio open"
  log-debug "Found gio"
elif [ ! -z "$(command -v xdg-open)" ]; then
  OPEN_CMD="xdg-open"
  log-debug "Found xdg-open"
else
  log-error "Could not find one of: gio, open, xdg-open"
  log-error "not ok"
  exit 1
fi

while [ -d "${PATH_OR_URL}" ]; do
  log-debug "Searching in ${PATH_OR_URL} with fzf"
  PATH_OR_URL="$(find "${PATH_OR_URL}" | fzf --preview "kbprev '{}'")"
done

log-debug "Path or URL: ${PATH_OR_URL}"

PROTOCOL="$(echo "${PATH_OR_URL}" | grep '://' | sed -e 's,^\(.*://\).*,\1,g')"

if [ -z "${PROTOCOL}" ]; then
  PROTOCOL="file://"
fi

log-debug "Protocol: ${PROTOCOL}"

MIME_TYPE="url"

if [[ "${PROTOCOL}" == "file://" ]]; then
  MIME_TYPE="$(file -b --mime-type ${PATH_OR_URL})"
fi

log-debug "Mime Type: ${MIME_TYPE}"

case $MIME_TYPE in
  url)
    eval "${OPEN_CMD} '${PATH_OR_URL}'"
    ;;
  text/plain|text/x-tex)
    eval "${EDITOR} '$PATH_OR_URL'"
    ;;
  *)
    eval "${OPEN_CMD} '${PATH_OR_URL}'"
esac

log-debug "ok"
