#!/bin/bash
# Deno Bot Installation Script
#
# Server Files: /mnt/server

apt update
apt install -y git curl jq file unzip

mkdir -p /mnt/server
cd /mnt/server

if [ "${USER_UPLOAD}" == "true" ] || [ "${USER_UPLOAD}" == "1" ]; then
    echo -e "assuming user knows what they are doing have a good day."
    exit 0
fi

## add git ending if it's not on the address
if [[ ${GIT_ADDRESS} != *.git ]]; then
    GIT_ADDRESS=${GIT_ADDRESS}.git
fi

if [ -z "${USERNAME}" ] && [ -z "${ACCESS_TOKEN}" ]; then
    echo -e "using anon api call"
else
    GIT_ADDRESS="https://${USERNAME}:${ACCESS_TOKEN}@$(echo -e ${GIT_ADDRESS} | cut -d/ -f3-)"
fi

## pull git js bot repo
if [ "$(ls -A /mnt/server)" ]; then
    echo -e "/mnt/server directory is not empty."
    if [ -d .git ]; then
        echo -e ".git directory exists"
        if [ -f .git/config ]; then
            echo -e "loading info from git config"
            ORIGIN=$(git config --get remote.origin.url)
        else
            echo -e "files found with no git config"
            echo -e "closing out without touching things to not break anything"
            exit 10
        fi
    fi

    if [ "${ORIGIN}" == "${GIT_ADDRESS}" ]; then
        echo "pulling latest from github"
        git pull
    fi
else
    echo -e "/mnt/server is empty.\ncloning files into repo"
    if [ -z ${BRANCH} ]; then
        echo -e "cloning default branch"
        git clone ${GIT_ADDRESS} .
    else
        echo -e "cloning ${BRANCH}'"
        git clone --single-branch --branch ${BRANCH} ${GIT_ADDRESS} .
    fi

fi

## get deno
GITHUB_PACKAGE=denoland/deno
MATCH=linux

## 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_URL=$(echo ${LATEST_JSON} | jq .assets | jq -r .[].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

if [ ! -z "${DOWNLOAD_URL}" ]; then
    if curl --output /dev/null --silent --head --fail ${DOWNLOAD_URL}; then
        echo -e "link is valid. setting download link to ${DOWNLOAD_URL}"
        DOWNLOAD_LINK=${DOWNLOAD_URL}
    else
        echo -e "link is invalid closing out"
        exit 2
    fi
fi

curl -sSL $DOWNLOAD_LINK -o ${DOWNLOAD_LINK##*/}

FILETYPE=$(file -F ',' ${DOWNLOAD_LINK##*/} | cut -d',' -f2 | cut -d' ' -f2)
if [ "$FILETYPE" == "gzip" ]; then
    tar xzvf ${DOWNLOAD_LINK##*/}
elif [ "$FILETYPE" == "Zip" ]; then
    unzip -o ${DOWNLOAD_LINK##*/}
elif [ "$FILETYPE" == "XZ" ]; then
    tar xvf ${DOWNLOAD_LINK##*/}
else
    echo -e "unknown filetype. Exiting"
    exit 2
fi

## cleaning up downloaded file
rm -f ${DOWNLOAD_LINK##*/}

echo -e "install complete"
exit 0