# github.com/brianmcgee has lots of great ideas for going above and beyond for this
{
  description = "Greg's homepage";
  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
    devshell.url = "github:numtide/devshell";
    flake-parts.url = "github:hercules-ci/flake-parts";
    flake-root.url = "github:srid/flake-root";
    hooks.url = "github:cachix/git-hooks.nix";
    naersk.url = "github:nix-community/naersk";
  };

  outputs =
    { flake-parts, ... }@inputs:
    flake-parts.lib.mkFlake { inherit inputs; } {
      imports = [
        inputs.devshell.flakeModule
        inputs.flake-root.flakeModule
        #inputs.process-compose.flakeModule
      ];
      flake = {
        # Universal things
        # final: prev:
        overlays.default = _: _: { };
      };
      systems = [
        "x86_64-linux"
        "aarch64-linux"
        "aarch64-darwin"
      ];
      perSystem =
        { pkgs, ... }@inputs':
        let
          naersk-lib = pkgs.callPackage inputs.naersk { };
        in
        {
          _module.args.pkgs = import inputs.nixpkgs {
            inherit (inputs') system;
            overlays = [ ];
          };
          # https://numtide.github.io/devshell/intro.html
          devshells.default = rec {
            # These commands will be shown in the motd that users read
            # upon entering the shell
            packages = with pkgs; [
              expat
              fontconfig
              freetype
              freetype.dev
              libGL
              pkg-config
              xorg.libX11
              xorg.libXcursor
              xorg.libXi
              xorg.libXrandr
              wayland
              libxkbcommon
            ];
            
            env = [
              {
                name = "LD_LIBRARY_PATH";
                value = builtins.foldl' (a: b: "${a}:${b}/lib") "${pkgs.vulkan-loader}/lib" packages;
              }
            ];
            commands = [
              {
                package = pkgs.cargo;
                category = "tools";
                help = "Rust build and package tool";
              }
              {
                package = pkgs.rustc;
                category = "languages";
                help = "Rust compiler";
              }
              {
                package = pkgs.rustfmt;
                category = "tools";
                help = "Standard Rust formatting tool";
              }
              {
                package = pkgs.clippy;
                category = "tools";
                help = "Rust linter";
              }
              {
                package = pkgs.stdenv.cc;
                category = "languages";
                help = "C compiler to help with building native code";
              }
              {
                package = pkgs.pre-commit;
                category = "tools";
                help = "Tool to help enforce commits make sense";
              }
            ];
          };

          checks = {
            pre-commit-check = inputs.hooks.lib.${inputs'.system}.run {
              src = ./.;
              hooks = {
                check-added-large-files.enable = true;
                check-case-conflicts.enable = true;
                check-merge-conflicts.enable = true;
                check-symlinks.enable = true;
                deadnix.enable = true;
                end-of-file-fixer.enable = true;
                fix-byte-order-marker.enable = true;
                mixed-line-endings.enable = true;
                nixfmt-rfc-style.enable = true;
                trim-trailing-whitespace.enable = true;
                # Rust hooks
                cargo-check.enable = true;
                clippy.enable = true;
                rustfmt.enable = true;
              };
            };
          };

          # This is not special, this is just flakes
          packages = {
            rustpkg = naersk-lib.buildPackage ./.;
          };
        };
    };
}