modularized all the things

part one (?)

modules/pwrMgmt/default.nix

@@ -0,0 +1,73 @@
+{
+  config,
+  lib,
+  ...
+}: let
+  # Define a more flexible power management module
+  cfg = config.pwrMgnt;
+in {
+  # Define options for customizable power management
+  options.pwrMgnt = {
+    enable = lib.mkEnableOption "Custom power management configuration";
+
+    cpuFreqGovernor = lib.mkOption {
+      type = lib.types.enum [
+        "performance"
+        "powersave"
+        "ondemand"
+        "conservative"
+      ];
+      default = "performance";
+      description = "CPU frequency scaling governor to use";
+    };
+
+    # PowerTop Configuration
+    powertop = {
+      enable = lib.mkEnableOption "PowerTop power management tool";
+
+      autotuneOnBoot = lib.mkOption {
+        type = lib.types.bool;
+        default = false;
+        description = "Automatically tune power settings on boot";
+      };
+    };
+
+    # Battery-specific settings (for laptops)
+    battery = {
+      enable = lib.mkEnableOption "Battery-specific power management";
+
+      startChargeThreshold = lib.mkOption {
+        type = lib.types.int;
+        default = 20;
+        description = "Percentage at which to start charging";
+      };
+
+      stopChargeThreshold = lib.mkOption {
+        type = lib.types.int;
+        default = 80;
+        description = "Percentage at which to stop charging";
+      };
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    powerManagement = {
+      enable = true;
+      cpuFreqGovernor = cfg.cpuFreqGovernor;
+    };
+
+    services.powertop.enable = cfg.powertop.enable;
+    systemd.services.battery-charge-threshold = lib.mkIf cfg.battery.enable {
+      description = "Set battery charge thresholds";
+      wantedBy = ["multi-user.target"];
+      script = ''
+        if [ -f /sys/class/power_supply/BAT0/charge_start_threshold ]; then
+          echo ${toString cfg.battery.startChargeThreshold} > /sys/class/power_supply/BAT0/charge_start_threshold
+        fi
+        if [ -f /sys/class/power_supply/BAT0/charge_stop_threshold ]; then
+          echo ${toString cfg.battery.stopChargeThreshold} > /sys/class/power_supply/BAT0/charge_stop_threshold
+        fi
+      '';
+    };
+  };
+}