#!/bin/bash

GITHUB_PACKAGE=Anuken/Mindustry
MATCH=server-release.jar

cd /mnt/server

if [ -z ${DOWNLOAD_LINK} ]; then
    if [ -z "${GITHUB_USER}" ] && [ -z "${GITHUB_OAUTH_TOKEN}" ] ; then
        echo -e "using anon api call"
    else
        echo -e "user and oauth token set"
        alias curl='curl -u ${GITHUB_USER}:${GITHUB_OAUTH_TOKEN} '
    fi

    ## get release info and download links
    LATEST_JSON=$(curl --silent "https://api.github.com/repos/${GITHUB_PACKAGE}/releases/latest")
    RELEASES=$(curl --silent "https://api.github.com/repos/${GITHUB_PACKAGE}/releases")

    if [ -z "${VERSION}" ] || [ "${VERSION}" == "latest" ]; then
        DOWNLOAD_LINK=$(echo ${LATEST_JSON} | jq -r '.assets | .[].browser_download_url' | grep -i ${MATCH})
    else
        VERSION_CHECK=$(echo ${RELEASES} | jq -r --arg VERSION "${VERSION}" '.[] | select(.tag_name==$VERSION) | .tag_name')
        if [ "${VERSION}" == "${VERSION_CHECK}" ]; then
            DOWNLOAD_LINK=$(echo ${RELEASES} | jq -r --arg VERSION "${VERSION}" '.[] | select(.tag_name==$VERSION) | .assets[].browser_download_url' | grep -i ${MATCH})
        else
            echo -e "defaulting to latest release"
            DOWNLOAD_LINK=$(echo ${LATEST_JSON} | jq .assets | jq -r .[].browser_download_url)
        fi
    fi
else
    echo -e "Checking supplied download link"
    if curl --output /dev/null --silent --head --fail ${DOWNLOAD_LINK}; then
        echo -e "link is valid. setting download link to ${DOWNLOAD_LINK}"
    else
        echo -e "link is invalid closing out"
        exit 2
    fi
fi

echo -e "running: wget ${DOWNLOAD_LINK}"
wget ${DOWNLOAD_LINK}

## install end
echo "-----------------------------------------"
echo "Installation completed..."
echo "-----------------------------------------"