#!/usr/bin/env sh
set -eu

SCRIPT_DIR="$(CDPATH= cd -- "$(dirname -- "$0")" && pwd)"
SERVER_DIR="$(CDPATH= cd -- "$SCRIPT_DIR/.." && pwd)"
SYSTEMD_DIR="${SYSTEMD_DIR:-/etc/systemd/system}"
ENV_DIR="${ENV_DIR:-/etc/qsfera}"
ENV_FILE="${ENV_FILE:-$ENV_DIR/rpi-production-check.env}"
RUN_NOW="${RUN_NOW:-true}"

if [ "$(id -u)" -eq 0 ]; then
    SUDO=""
else
    SUDO="${SUDO:-sudo}"
fi

run_privileged() {
    if [ -n "$SUDO" ]; then
        "$SUDO" "$@"
    else
        "$@"
    fi
}

install_unit() {
    source_path="$1"
    target_path="$2"
    run_privileged install -m 0644 "$source_path" "$target_path"
}

tmp_env="$(mktemp)"
cleanup() {
    rm -f "$tmp_env"
}
trap cleanup EXIT INT TERM

run_privileged install -d -m 0755 "$SYSTEMD_DIR" "$ENV_DIR"

if [ ! -f "$ENV_FILE" ]; then
    {
        echo "QSFERA_SERVER_DIR=$SERVER_DIR"
        grep -v '^QSFERA_SERVER_DIR=' "$SERVER_DIR/systemd/rpi-production-check.env.example"
    } >"$tmp_env"
    run_privileged install -m 0640 "$tmp_env" "$ENV_FILE"
    echo "Created $ENV_FILE"
else
    echo "Keeping existing $ENV_FILE"
fi

install_unit "$SERVER_DIR/systemd/qsfera-rpi-production-check.service" "$SYSTEMD_DIR/qsfera-rpi-production-check.service"
install_unit "$SERVER_DIR/systemd/qsfera-rpi-production-check.timer" "$SYSTEMD_DIR/qsfera-rpi-production-check.timer"
install_unit "$SERVER_DIR/systemd/qsfera-rpi-production-check-alert@.service" "$SYSTEMD_DIR/qsfera-rpi-production-check-alert@.service"

run_privileged systemctl daemon-reload
run_privileged systemctl enable --now qsfera-rpi-production-check.timer

if [ "$RUN_NOW" = "true" ]; then
    run_privileged systemctl start qsfera-rpi-production-check.service
fi

run_privileged systemctl --no-pager status qsfera-rpi-production-check.timer
run_privileged systemctl --no-pager show qsfera-rpi-production-check.service -p Result -p ExecMainStatus -p ActiveState