#!/bin/bash

INSTALLER=""
INSTALL_PACKAGES=(tmux pv)

echo_install_method() {
    echo "Found ${1}, using ${1} to install packages"
}

install_method_centos() {

    # Steamcmd requirements
    INSTALL_PACKAGES+=(glibc.i686 libstdc++.i686)

    if which dnf >/dev/null 2>&1; then
        INSTALLER="dnf -y install"
        echo_install_method "dnf"
    elif which yum >/dev/null 2>&1; then
        INSTALLER="yum -y install"
        echo_install_method "yum"
    else
        echo "Unable to determine installer!"
        return 1
    fi
    echo "Installing epel-release, NOT fully configured..., see: https://docs.fedoraproject.org/en-US/epel/"
    sleep 3
    "$("${INSTALLER}" epel-release)"
}

install_method_ubuntu() {

    # Steamcmd requirements
    INSTALL_PACKAGES+=(lib32gcc1)

    if which apt >/dev/null 2>&1; then
        INSTALLER="apt install -y"
        echo_install_method "apt"
    elif which apt-get >/dev/null 2>&1; then
        INSTALLER="apt-get install -y"
        echo_install_method "apt-get"
    else
        echo "Unable to determine installer!"
        return 1
    fi
}

main() {
    # Auto exit is /etc/os-release does not exist, we depend upon this to determine os name
    if [[ ! -f "/etc/os-release" ]]; then
        echo "Unable to continue, cannot determine os release as /etc/os-release does not exist"
        exit 1
    fi

    # This gets the unquoted os-release name
    OS_RELEASE="$(grep ^NAME= /etc/os-release | cut -d "=" -f2 | tr -d '"')"

    if [[ "${OS_RELEASE}" = "CentOS Linux" ]]; then
        install_method_centos || exit
    elif [[ "${OS_RELEASE}" = "Ubuntu" ]]; then
        install_method_ubuntu || exit
    else
        echo "${OS_RELEASE} is not a supported distribution, attempt a manual installation."
        exit 1
    fi

    if [[ -z "${INSTALLER}" ]]; then
        echo "No installer found, exiting..."
        exit 1
    fi

    for pkg in "${INSTALL_PACKAGES[@]}"; do
        echo "Installing ${pkg}"
        "$("${INSTALLER}" "${pkg}")"
    done

    echo "Finished installing general module items"
}

main "${@}"