From c8fc9152fd8756bc1418b7489228153b769a4cfd Mon Sep 17 00:00:00 2001
From: Felix Buehler <account@buehler.rocks>
Date: Mon, 1 Sep 2025 23:45:41 +0200
Subject: [PATCH] hardware/action-on-low-power: init

---
 machines/thinkman/hardware-configuration.nix  |  1 +
 .../hardware/action-on-low-power/default.nix  | 45 +++++++++++++++++++
 modules/hardware/default.nix                  |  1 +
 3 files changed, 47 insertions(+)
 create mode 100644 modules/hardware/action-on-low-power/default.nix

diff --git a/machines/thinkman/hardware-configuration.nix b/machines/thinkman/hardware-configuration.nix
index af5463d..79c605c 100644
--- a/machines/thinkman/hardware-configuration.nix
+++ b/machines/thinkman/hardware-configuration.nix
@@ -15,6 +15,7 @@ in
   services.tlp.enable = true;
 
   my.hardware = {
+    action-on-low-power.enable = true;
     bluetooth.enable = true;
     debug.enable = true;
     drive-monitor.enable = true;
diff --git a/modules/hardware/action-on-low-power/default.nix b/modules/hardware/action-on-low-power/default.nix
new file mode 100644
index 0000000..e600778
--- /dev/null
+++ b/modules/hardware/action-on-low-power/default.nix
@@ -0,0 +1,45 @@
+# low power action
+{
+  config,
+  lib,
+  options,
+  pkgs,
+  ...
+}:
+let
+  cfg = config.my.hardware.action-on-low-power;
+in
+{
+  options.my.hardware.action-on-low-power = {
+    enable = lib.mkEnableOption "action on low power";
+
+    action = lib.mkOption {
+      type = lib.types.enum [
+        "hibernate"
+        "hybrid-sleep"
+        "poweroff"
+        "sleep"
+        "suspend-then-hibernate"
+        "suspend"
+      ];
+      default = "sleep";
+      description = ''
+        Action to take when power is low.
+      '';
+    };
+
+    powerInPercent = lib.mkOption {
+      type = lib.types.int;
+      default = 10;
+      description = ''
+        Power percentage threshold to trigger the action.
+      '';
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    services.udev.extraRules = ''
+      SUBSYSTEM=="power_supply", ATTR{status}=="Discharging", ATTR{capacity}=="${toString cfg.powerInPercent}", RUN+="${config.systemd.package}/bin/systemctl ${cfg.action}"
+    '';
+  };
+}
diff --git a/modules/hardware/default.nix b/modules/hardware/default.nix
index 11dc7e9..50b9dbe 100644
--- a/modules/hardware/default.nix
+++ b/modules/hardware/default.nix
@@ -2,6 +2,7 @@
 { ... }:
 {
   imports = [
+    ./action-on-low-power
     ./bluetooth
     ./debug
     ./drive-monitor