#!/bin/bash

function do_uninstall {
    set -x
    systemctl stop h804tun
    rm -rf /opt/h804tun
    systemctl disable h804tun
    rm /etc/systemd/system/h804tun.service
    systemctl daemon-reload
}

function do_build {
    echo "Building..."
    rm -rf build/
    mkdir -p build/
    pushd build/
    cmake -DWITH_SYSTEMD=ON ..
    cmake --build .
    if [ -f /opt/h804tun/h804tun.conf ]; then
        head -n 2 /opt/h804tun/h804tun.conf > h804tun.conf
    else
        echo "INTERFACE_NAME" > h804tun.conf
        echo "STATIC_IP" >> h804tun.conf
    fi
    echo "" >> h804tun.conf
    echo "# Interfaces: " >> h804tun.conf
    ip link | sed 's/^/# /' >> h804tun.conf
    if [ -z "$EDITOR" ]; then
        EDITOR=ed
    fi
    $EDITOR h804tun.conf
    popd
}

function do_install {
    set -x
    systemctl stop h804tun
    mkdir -p /opt/h804tun
    cp build/h804tun /opt/h804tun/h804tun
    cp build/h804tun.conf /opt/h804tun/h804tun.conf
    cp h804tun.service /etc/systemd/system
    systemctl daemon-reload
}

if [ $# == 0 ] || [ $1 == "install" ]; then
    do_build
    sudo $0 do_install
elif [ $1 == "uninstall" ]; then
    sudo $0 do_uninstall
elif [ $1 == "do_install" ]; then
    do_install
elif [ $1 == "do_uninstall" ]; then
    do_uninstall
fi