flake.nix


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{
  description = "NixOS configuration for multiple machines with modular home-manager and rice support";

  inputs = {
    # Core
    nixpkgs.url = "github:nixos/nixpkgs/nixos-25.11";
    nixpkgs-unstable.url = "github:nixos/nixpkgs/nixos-unstable";

    # Home Manager
    home-manager = {
      url = "github:nix-community/home-manager/release-25.11";
      inputs.nixpkgs.follows = "nixpkgs";
    };

    # Theming - centralized color management
    stylix = {
      url = "github:danth/stylix/release-25.11";
      inputs.nixpkgs.follows = "nixpkgs";
    };

    # Rust toolchain
    fenix = {
      url = "github:nix-community/fenix";
      inputs.nixpkgs.follows = "nixpkgs";
    };

    # Rust build system for Nix
    crane.url = "github:ipetkov/crane";

    nixcord.url = "github:FlameFlag/nixcord";
  };

  outputs = {
    self,
    nixpkgs,
    nixpkgs-unstable,
    home-manager,
    stylix,
    fenix,
    crane,
    nixcord,
    ...
  } @ inputs: let
    system = "x86_64-linux";

    # Overlays for the system
    overlays = [
      # Access unstable packages via pkgs.unstable.*
      (final: prev: {
        unstable = import nixpkgs-unstable {
          inherit system;
          config.allowUnfree = true;
        };
      })
      # Fenix Rust overlay
      fenix.overlays.default
      # Local TeXLive packages
      (final: prev: {
        scpzine-texlive = final.callPackage ./pkgs/scpzine-texlive.nix {};
      })
    ];

    # Per-host home-manager configuration
    mkHomeManagerModule = hostname: rice: {
      home-manager = {
        useGlobalPkgs = true;
        useUserPackages = true;
        extraSpecialArgs = {
          inherit inputs;
          inherit hostname;
          inherit rice;
        };
        users.mun = {
          imports = [
            ./home/mun
            ./home/rices/${rice}/home.nix
          ];
        };
      };
    };

    # Helper to create a NixOS system with rice
    mkSystem = hostname: rice:
      nixpkgs.lib.nixosSystem {
        inherit system;
        specialArgs = {inherit inputs;};
        modules = [
          # Apply overlays via nixpkgs module
          {
            nixpkgs = {
              inherit overlays;
              config.allowUnfree = true;
            };
          }
          ./hosts/${hostname}/configuration.nix
          ./system
          ./home/rices/${rice}/system.nix
          home-manager.nixosModules.home-manager
          stylix.nixosModules.stylix
          (mkHomeManagerModule hostname rice)
        ];
      };
  in {
    nixosConfigurations = {
      kronos = mkSystem "kronos" "schrottkatze";
      herra = mkSystem "herra" "cinnamon";
      mystra = mkSystem "mystra" "nord-blue";
    };
  };
}