#!/bin/bash

usage() {
    echo "Usage: $0 [-h] [-m|M] [-p]" 1>&2; 
    echo "  -h: This message" 1>&2; 
    echo "  -p: Pre release" 1>&2;
    echo "  -m: Increment minor" 1>&2;
    echo "  -M: Increment major" 1>&2;
}

PRE_RELEASE=0
ALTERS=0
ALTER_NAME="release"

while getopts "hpmMr" o; do
    case "${o}" in
        p) 
            PRE_RELEASE=1
            ;;
        r)
            ALTERS=$ALTERS+1
            ALTER_NAME="release"
            ;;
        m)
            ALTERS=$ALTERS+1
            ALTER_NAME="minor"
            ;;
        M)
            ALTERS=$ALTERS+1
            ALTER_NAME="major"
            ;;
        h) 
            usage
            exit 0;
            ;;
		*)
            printerr "Unsupported option ${o}"
			usage
            exit 1;
			;;
    esac
done

if [[ $ALTERS -gt 1 ]]; then
    echo "You can specify exactly one option between m and M"
    usage
    exit 1;
fi

CURRENT_VERSION=`./latest-ver.sh`

INCREMENT_NAME=$ALTER_NAME
if [[ $PRE_RELEASE -gt 0 ]]; then
    INCREMENT_NAME="pre$INCREMENT_NAME"
fi

NEW_VERSION=`semver $CURRENT_VERSION --preid rc -i $INCREMENT_NAME`

echo "$NEW_VERSION"