#!/usr/bin/env bash

set -e

echo "making release"

if [[ "$OSTYPE" == "darwin"* ]];
then
    prev_version=$(cat mix.exs| grep "version: " | sed -e 's/.*version: "\(.*\)",/\1/')

    if [ "$prev_version" == "" ]
    then
        minor="1"
    else
        prev_minor=$(echo "$prev_version" | cut -d . -f 2)
        minor=$((prev_minor+1))
    fi

    major=$(echo $prev_version| awk '{ print substr($1, 0, index($1, ".")) }')

    version="$major$minor.0"

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

    if [ "$prev_version" == "" ]
    then
        echo "no prev version.. skipping"
    else
        sed -i '' -e "/version/s/${prev_version/v/}/${version/v/}/g" mix.exs
    fi
elif [[ "$OSTYPE" == "msys" ]];
then
    prev_version=$(cat mix.exs| grep "version: " | sed -e 's/.*version: "\(.*\)",/\1/')
    
    if [ "$prev_version" == "" ]
    then
        minor="1"
    else
        prev_minor=$(echo "$prev_version" | cut -d . -f 2)
        minor=$((prev_minor+1))
    fi


    minor=$(echo $prev_version| awk '{ print substr($1, 0, index($1, ".")) }')
    version="$minor.$patch"

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

    if [ "$prev_version" == "" ]
    then
        echo "no prev version.. skipping"
    else
        sed -i "/version/s/${prev_version/v/}/${version/v/}/g" mix.exs
    fi
elif [[ "$OSTYPE" == "linux-gnu" ]];
then
    major=$(cat mix.exs | grep "version: " | sed -re 's/version: "([0-9]*)\.([0-9]*)\.([0-9]*)",/\1/g' | sed -r 's/ //g')
    minor=$(cat mix.exs | grep "version: " | sed -re 's/version: "([0-9]*)\.([0-9]*)\.([0-9]*)",/\2/g'| sed -r 's/ //g')
    patch=$(cat mix.exs | grep "version: " | sed -re 's/version: "([0-9]*)\.([0-9]*)\.([0-9]*)",/\3/g'| sed -r 's/ //g')

    if [ "$minor" == "" ]
    then
        next_minor="0"
    else
        next_minor=$((minor+1))
    fi

    prev_version="$major.$minor.$patch"
    version="$major.$next_minor.0"

    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
fi

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

echo "set tag"

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