#!/usr/bin/env bash

FLAKE_DIR="/home/john/.config/home-manager/jsl-dendritic"

is_in_array() {
    local needle="$1"
    shift
    local arr=("$@")
    [[ " ${arr[*]} " == *" ${needle} "* ]] && echo true || echo false
}

hostname_exists() {
    NIX_EVAL_CMD="nix eval --json --no-warn-dirty --apply builtins.attrNames"
    mapfile -t HOME_CONFIGS < <(${NIX_EVAL_CMD} ${FLAKE_DIR}#homeConfigurations | jq -r '.[]')
    is_in_array "$(hostname)" "${HOME_CONFIGS[@]}"
}

HOSTNAME=$(hostname)
if [[ "$(hostname_exists)" == "true" ]]; then
    home-manager switch --flake "${FLAKE_DIR}#${HOSTNAME}"
else
    echo "No homeConfiguration found for hostname '${HOSTNAME}'." >&2
    exit 1
fi