{
description = "Aether - web server configuration";

inputs = {
  nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
  nixos-raspberrypi.url = "github:nvmd/nixos-raspberrypi/main";

  agenix.url = "github:ryantm/agenix";
  agenix.inputs.nixpkgs.follows = "nixpkgs";
  agenix.inputs.darwin.follows = "";

  forgejo-tokyo-night.url = "https://git.tokinanpa.dev/toki/forgejo-tokyo-night/archive/main.tar.gz";
  forgejo-tokyo-night.flake = false;
};

nixConfig = {
  extra-substituters = [
    "https://nixos-raspberrypi.cachix.org"
  ];
  extra-trusted-public-keys = [
    "nixos-raspberrypi.cachix.org-1:4iMO9LXa8BqhU+Rpg6LQKiGa2lsNh/j2oiYLNOQ5sPI="
  ];
};

outputs = inputs@{ self, nixpkgs, nixos-raspberrypi, agenix, ... }:
  let
    inherit (nixpkgs) lib;

    # Extra config applied to each module
    # (Mostly used for injecting flake inputs)
    extraConfig = {
      deploy-rpi5 = {
        imports = with nixos-raspberrypi.nixosModules; [
          raspberry-pi-5.base
          raspberry-pi-5.page-size-16k
          raspberry-pi-5.display-vc4
        ];
      };
    };

    moduleNames =
      let sub = builtins.readDir ./modules;
      in builtins.filter
        (d: sub.${d} == "directory")
        (builtins.attrNames sub);

    deployNames =
      let sub = builtins.readDir ./deploy;
      in builtins.map (d: "deploy-${d}")
        (builtins.filter
          (d: sub.${d} == "directory")
          (builtins.attrNames sub));

    modules = lib.genAttrs moduleNames
      (name: ./modules/${name});
    deployments = lib.genAttrs deployNames
      (name: ./deploy/${lib.removePrefix "deploy-" name});

    modulesWithCfg = builtins.mapAttrs (k: v: {
      imports = [ v (extraConfig.${k} or {}) ];
    }) modules;
    deploymentsWithCfg = builtins.mapAttrs (k: v: {
      imports = [ v (extraConfig.${k} or {}) ];
    }) deployments;
  in {
    nixosModules =
      modulesWithCfg // deploymentsWithCfg // {
        all.imports = lib.attrValues modulesWithCfg;
      };

    nixosConfigurations."toki-aether" =
      nixos-raspberrypi.lib.nixosSystem {
        specialArgs = inputs // {
          aether = self.nixosModules;
        };
        modules = [
          agenix.nixosModules.default
          ./aether/hardware-configuration.nix
          ./aether/config.nix
        ];
      };
    nixosConfigurations.default = self.nixosConfigurations."toki-aether";
  };
}