#!/bin/sh
set -eu

site=${GITPOCKET_URL:-https://gitpocket.io}
visibility=secret
description=
name=

usage() {
	echo "usage: gist [-p] [-d description] [-n name] [file ...]" >&2
	echo "reads stdin when no file is given, GITPOCKET_TOKEN must hold a token scoped gist or all" >&2
	exit 2
}

enc() {
	printf %s "$1" | od -An -tx1 -v | tr -d ' \n' | sed 's/../%&/g'
}

while getopts pd:n:h opt; do
	case $opt in
	p) visibility=public ;;
	d) description=$OPTARG ;;
	n) name=$OPTARG ;;
	*) usage ;;
	esac
done
shift $((OPTIND - 1))

token=${GITPOCKET_TOKEN:-}
[ -n "$token" ] || usage
api="$site/api/gists"
auth="Authorization: Bearer $token"

if [ $# -eq 0 ]; then
	exec curl -sS --fail-with-body -H "$auth" --data-binary @- \
		"$api?name=$(enc "$name")&visibility=$visibility&description=$(enc "$description")"
fi

first=$1
shift
if ! url=$(curl -sS --fail-with-body -H "$auth" --data-binary @"$first" \
	"$api?name=$(enc "${name:-$(basename "$first")}")&visibility=$visibility&description=$(enc "$description")"); then
	echo "$url" >&2
	exit 1
fi
id=${url##*/}
for file in "$@"; do
	curl -sS --fail-with-body -o /dev/null -X PUT -H "$auth" --data-binary @"$file" \
		"$api/$id/files/$(enc "$(basename "$file")")"
done
echo "$url"