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# Copyright 2025 Shota FUJI
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
# SPDX-License-Identifier: Apache-2.0

{
  description = "Plac for GTK4";

  inputs = {
    nixpkgs = {
      url = "github:nixos/nixpkgs/nixpkgs-unstable";
    };
  };

  outputs =
    { nixpkgs, ... }:
    let
      systems = [
        "x86_64-linux"
        "aarch64-linux"
        "x86_64-darwin"
        "aarch64-darwin"
      ];

      forEachSystems =
        f:
        nixpkgs.lib.genAttrs systems (
          system:
          f {
            inherit system;
            pkgs = nixpkgs.legacyPackages.${system};
          }
        );
    in
    rec {
      packages = forEachSystems (
        { pkgs, ... }:
        {
          default = pkgs.callPackage ./nix/package.nix { };
        }
      );

      homeManagerModules.default =
        {
          config,
          lib,
          pkgs,
          ...
        }:
        {
          options = {
            programs.plac-gtk = {
              enable = lib.mkOption {
                type = lib.types.bool;
                default = true;
                description = "Whether to enable Plac for GTK4.";
              };

              settings = {
                discovery-udp-port = lib.mkOption {
                  type = lib.types.ints.u16;
                  default = 0;
                  description = "UDP port number to use for Roon Server scanning. Set 0 to pick a random empty port at runtime.";
                };

                show-browse-item-separators = lib.mkOption {
                  type = lib.types.bool;
                  default = false;
                  description = "Whether to display separator between browse item rows.";
                };

                show-seek-by-10secs = lib.mkOption {
                  type = lib.types.bool;
                  default = false;
                  description = "Whether to display buttons that seek forwards/backwards by 10 seconds.";
                };
              };
            };
          };

          config =
            let
              cfg = config.programs.plac-gtk;
            in
            {
              home.packages = lib.mkIf cfg.enable [ packages.${pkgs.stdenv.system}.default ];

              dconf.settings."jp/pocka/plac/gtk-adwaita" = lib.mkIf cfg.enable {
                discovery-udp-port = lib.hm.gvariant.mkUint32 cfg.settings.discovery-udp-port;
                show-browse-item-separators = cfg.settings.show-browse-item-separators;
                show-seek-by-10secs = cfg.settings.show-seek-by-10secs;
              };
            };
        };

      devShells = forEachSystems (
        { pkgs, system }:
        {
          default = pkgs.mkShell {
            buildInputs = [
              packages.${system}.default.nativeBuildInputs
              packages.${system}.default.buildInputs
            ];

            packages =
              with pkgs;
              [
                # > Source Code Beautifier for C, C++, C#, ObjectiveC, D, Java, Pawn and VALA
                # https://uncrustify.sourceforge.net/
                uncrustify

                # For text editors, optional.
                # > ZLS is a non-official implementation of the Language Server Protocol for Zig
                # https://github.com/zigtools/zls
                zls

                # For text editors, optional.
                # >  Code Intelligence for Vala & Genie
                # https://github.com/vala-lang/vala-language-server
                vala-language-server

                # Code formatter
                # Called by treefmt
                # https://dprint.dev/
                dprint

                # Code formatter
                # https://github.com/numtide/treefmt
                treefmt

                # Copyright and license linter based on SPDX
                # https://github.com/fsfe/reuse-tool
                reuse

                # Official formatter for Nix code
                # https://github.com/NixOS/nixfmt
                nixfmt
              ]
              # Non macOS packages (not supported, broken, etc.)
              ++ (lib.optionals (!stdenv.isDarwin) [
                # For debugging, optional.
                # > Valgrind is an instrumentation framework for building dynamic analysis tools
                # https://valgrind.org/
                valgrind
              ]);

            # "pkgs.zig" incorrectly sets $ZIG_GLOBAL_CACHE_DIR unconditionally.
            # This prevents running zig command due to permission error.
            # https://github.com/NixOS/nixpkgs/issues/270415
            # https://github.com/NixOS/nixpkgs/pull/473413
            shellHook = ''
              unset ZIG_GLOBAL_CACHE_DIR
            '';
          };
        }
      );
    };
}