/*
Some utility commands:
- `nix flake update --commit-lock-file`
- `nix flake lock update-input <input>`
- `nix build .#tegakituesday` or `nix build .`
- `nix run .#tegakituesday` or `nix run .`
*/

{
  description = "The website for the Tegaki Tuesday handwriting challenge.";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
    rust-overlay.url = "github:oxalica/rust-overlay";
  };

  outputs = { self, nixpkgs, rust-overlay }:
    let
      overlays = [ (import rust-overlay) ];
      system = "x86_64-linux";
      pkgs = import nixpkgs {
        inherit system overlays;
      };
      rust = pkgs.rust-bin.nightly.latest;
      rust-bin = rust.minimal;
      rustPlatform = pkgs.makeRustPlatform {
        cargo = rust-bin;
        rustc = rust-bin;
      };
      rustSettings = with pkgs; {
        src = ./.;
        cargoHash = nixpkgs.lib.fakeHash;
      };
      meta = with nixpkgs.lib; {
        homepage = "https://tegakituesday.com";
        #license = [ licenses.unfree ];
        platforms = [ system ];
        maintainers = with maintainers; [ elnudev ];
      };
    in {
      devShells.${system}.default = with pkgs; mkShell {
        packages = [
          (pkgs.rust-bin.nightly.latest.default.override {
            extensions = [ "rust-src" ];
          })
          cargo-edit
          bacon
        ];
        inputsFrom = with self.packages.${system}; [ tegakituesday ];
        allowUnfree = true;
      };
      packages.${system} = {
        default = self.packages.${system}.tegakituesday;
        tegakituesday = rustPlatform.buildRustPackage (rustSettings // {
          pname = "tegakituesday";
          version = "0.1.0";
          nativeBuildInputs = with pkgs; [ pkg-config dart-sass ];
          buildInputs = with pkgs; [ openssl gettext sqlite ];
          buildAndTestSubdir = "tegakituesday";
          cargoHash = "sha256-XvC5YRt9q39L+b/SHJd7e1VutrEUlKpfbVhJP75/qco=";
          postPatch = ''
            pushd tegakituesday
            sass styles/sass/style.sass:$out/share/styles/css/style.css
            if [ -d assets ]; then
              cp -r assets $out/share
            else
              mkdir -p $out/share/assets
            fi
            cp -r static $out/share
            sed -i -E "s|relative\!\(\"([^\"]+)\"\)|\"''${out}\/share\/\1\"|" src/main.rs
            popd
          '';
          meta = meta // {
            description = "The website for the Tegaki Tuesday handwriting challenge.";
          };
        });
      };
      /*
      nixosModules.default = { config, ... }: let
        lib = nixpkgs.lib;
      in {
        options.services.tegakituesday = {
          enable = lib.mkEnableOption (lib.mdDoc "tegakituesday service");
          package = lib.mkOption {
            type = lib.types.package;
            default = self.packages.${system}.tegakituesday;
            defaultText = "pkgs.tegakituesday";
            description = lib.mdDoc ''
              The tegakituesday package that should be used.
            '';
          };
          port = lib.mkOption {
            type = lib.types.port;
            default = 8000;
            description = lib.mdDoc ''
              The port at which to run.
            '';
          };
        };
        config.systemd.services.tegakituesday = let
          cfg = config.services.tegakituesday;
          pkg = self.packages.${system}.tegakituesday;
        in lib.mkIf cfg.enable {
          description = pkg.meta.description;
          after = [ "network.target" ];
          wantedBy = [ "network.target" ];
          serviceConfig = {
            ExecStart = ''
              ${cfg.package}/bin/tegakituesday --port ${builtins.toString cfg.port}
            '';
            Restart = "always";
            DynamicUser = true;
          };
        };
      };
      */
    };
}