#!/usr/bin/env bash

set -e

echo "making release"

if [[ "$OSTYPE" == "linux-gnu" ]];
then
    major=$(cat mix.exs | grep "version: " | sed -re 's/version: "([0-9]*)\.([0-9]*)\.([0-9]*)-?[0-9]*",/\1/g' | sed -r 's/ //g')
    minor=$(cat mix.exs | grep "version: " | sed -re 's/version: "([0-9]*)\.([0-9]*)\.([0-9]*)-?[0-9]*",/\2/g'| sed -r 's/ //g')
    patch=$(cat mix.exs | grep "version: " | sed -re 's/version: "([0-9]*)\.([0-9]*)\.([0-9]*)-?[0-9]*",/\3/g'| sed -r 's/ //g')
    pre_release=$(cat mix.exs | grep "version: " | grep "-" | sed -re 's/version: "([0-9]*)\.([0-9]*)\.([0-9]*)-([0-9]*)",/\4/g'| sed -r 's/ //g')

    echo "major: $major"
    echo "minor: $minor"
    echo "patch: $patch"
    echo "pre-release: $pre_release"

    if [ "$pre_release" == "" ]
    then
        next_pre_release="0"
        prev_version="$major.$minor.$patch"
        version="$major.$minor.$patch-$next_pre_release"
    else
        next_pre_release=$((pre_release+1))
        echo "next pre release: $next_pre_release"
        prev_version="$major.$minor.$patch-$pre_release"
        echo "prev version: $prev_version"
        version="$major.$minor.$patch-$next_pre_release"
        echo "version: $version"
    fi


    echo "Updating version in mix file from ${prev_version} to ${version}"

    if [ "$major.$minor.$patch" == ".." ]
    then
        echo "no prev version.. skipping"
    else
        sed -i "/version/s/$prev_version/$version/g" mix.exs
    fi
elif [[ "$OSTYPE" == "darwin"* ]];
then
    echo "DIY dear MACOS friend"
elif [[ "$OSTYPE" == "msys" ]];
then
    major=$(cat mix.exs | grep "version: " | sed -re 's/version: "([0-9]*)\.([0-9]*)\.([0-9]*)-?[0-9]*",/\1/g' | sed -r 's/ //g')
    minor=$(cat mix.exs | grep "version: " | sed -re 's/version: "([0-9]*)\.([0-9]*)\.([0-9]*)-?[0-9]*",/\2/g'| sed -r 's/ //g')
    patch=$(cat mix.exs | grep "version: " | sed -re 's/version: "([0-9]*)\.([0-9]*)\.([0-9]*)-?[0-9]*",/\3/g'| sed -r 's/ //g')
    pre_release=$(cat mix.exs | grep "version: " | grep "-" | sed -re 's/version: "([0-9]*)\.([0-9]*)\.([0-9]*)-([0-9]*)",/\4/g'| sed -r 's/ //g')

    echo "major: $major"
    echo "minor: $minor"
    echo "patch: $patch"
    echo "pre-release: $pre_release"

    if [ "x$pre_release" == "x" ]
    then
        next_pre_release="0"
        prev_version="$major.$minor.$patch"
        version="$major.$minor.$patch-$next_pre_release"
    else
        next_pre_release=$((pre_release+1))
        echo "next pre release: $next_pre_release"
        prev_version="$major.$minor.$patch-$pre_release"
        echo "prev version: $prev_version"
        version="$major.$minor.$patch-$next_pre_release"
        echo "version: $version"
    fi


    echo "Updating version in mix file from ${prev_version} to ${version}"

    if [ "$major.$minor.$patch" == ".." ]
    then
        echo "no prev version.. skipping"
    else
        sed -i "/version/s/$prev_version/$version/g" mix.exs
    fi
else
    echo "We are on dishwasher. Can't start"
    exit 1
fi

echo "Pushing git tag:"

git add mix.exs
git commit -m "Update version in mix.exs to $version"
git push origin master

git tag "v$version"
git push --tags