#!/bin/bash
set -euo pipefail

PROG_NAME="kindle-cmd"

print_usage() {
	echo "$PROG_NAME <command>"
}

print_help() {
	print_usage

	echo -e "\nCOMMANDS:"
	echo -e "\tmount       Mount the device"
	echo -e "\tumount      Unmount the device"
	echo -e "\tls          List files on device"
	echo -e "\tadd <file>  Add file to device"
	echo -e "\trm <file>   Remove file from device"
	echo -e "\thelp        Show this help information"
}

if [ $# -lt 1 ]
then
	>&2 echo "No commands given. Use 'help' for information."
	print_usage
	exit 1
fi

COMMAND="$1"
shift

case "$COMMAND" in
	"mount")
		gio mount "mtp://Amazon_Kindle_G093KM075467019V/"
		;;
	"umount")
		gio mount -u "mtp://Amazon_Kindle_G093KM075467019V/"
		;;
	"ls")
		gio list "mtp://Amazon_Kindle_G093KM075467019V/Internal Storage/documents" | grep -v ".sdr"
		;;
	"add")
		if [ $# -ne 1 ]
		then
			>&2 echo "Wrong number of arguments. Use 'help' for information."
			exit 1
		fi
		FILE="$1"
		gio copy "$FILE" "mtp://Amazon_Kindle_G093KM075467019V/Internal Storage/documents/"
		;;
	"rm")
		if [ $# -ne 1 ]
		then
			>&2 echo "Wrong number of arguments. Use 'help' for information."
			exit 1
		fi
		FILE="$1"
		gio remove "mtp://Amazon_Kindle_G093KM075467019V/Internal Storage/documents/$FILE"
		;;
	"help")
		print_help
		;;
	*)
		>&2 echo "Unknown command '$COMMAND'. Use 'help' for information."
		exit 1
		;;
esac