{
  config,
  lib,
  pkgs,
  ...
}:
with lib;
let
  cfg = config.aviallon.desktop;
  generalCfg = config.aviallon.general;

  filterConfig = pkgs.callPackage ./pipewire/pipewire-noise-filter.conf.nix {
    noiseFilterStrength = cfg.audio.noise-filter.strength;
  };

  airplayConfig = pkgs.callPackage ./pipewire/pipewire-airplay.conf.nix { };

  # Multimedia Packages

  ffmpeg-full-unfree =
    let
      withUnfree = pkgs.unstable.ffmpeg-full.override {
        withUnfree = true;
        withTensorflow = false;
      };
    in
    withUnfree;

in
{
  config = mkIf (cfg.enable && !generalCfg.minimal) {
    environment.systemPackages = with pkgs; [
      ffmpeg-full-unfree
      krita
      (pkgs.wrapOBS {
        plugins = with obs-studio-plugins; [
          obs-pipewire-audio-capture
        ];
      })

      #scribus
      yt-dlp
      #jellyfin-media-player # https://github.com/NixOS/nixpkgs/issues/437865 https://github.com/jellyfin/jellyfin-media-player/issues/282
      jellyfin-mpv-shim

      #jamesdsp # Audio post-processing
    ];

    nixpkgs.overlays = [
      (final: prev: {
        inherit ffmpeg-full-unfree;
      })
    ];

    # Enable sound.
    services.pulseaudio.enable = false;
    services.pipewire = {
      enable = true;
      pulse.enable = true;
      jack.enable = true;
      alsa.enable = true;
      alsa.support32Bit = mkDefault true;
      wireplumber.enable = true;
    };

    hardware.bluetooth.enable = true;
    hardware.bluetooth.settings = {
      General = {
        Experimental = true;
        KernelExperimental = concatStringsSep "," [
          "6fbaf188-05e0-496a-9885-d6ddfdb4e03e" # BlueZ Experimental ISO socket
        ];
      };
      Policy = {
        ResumeDelay = 4;
      };
    };

    services.pipewire.extraConfig.pipewire = {
      "10-combined-outputs" = {
        "context.modules" = [
          {
            name = "libpipewire-module-combine-stream";
            args = {
              "combine.mode" = "sink";
              "node.name" = "combine_sink";
              "node.description" = "Sortie combinée";
              "combine.latency-compensate" = true;
              "combine.props" = {
                "audio.position" = [
                  "FL"
                  "FR"
                ];
              };
              "stream.props" = { };
              "stream.rules" = [
                {
                  matches = [
                    # any of the items in matches needs to match, if one does,
                    # actions are emited.
                    {
                      # all keys must match the value. ! negates. ~ starts regex.
                      #node.name = "~alsa_input.*"
                      "media.class" = "Audio/Sink";
                    }
                  ];
                  actions.create-stream = { };
                }
              ];
            };
          }
        ];
      };
    };

    # https://pipewire.pages.freedesktop.org/wireplumber/daemon/configuration/bluetooth.html
    services.pipewire.wireplumber.extraConfig = {
      "monitor.bluez.properties" = {
        "bluez5.enable-sbc-xq" = true; # Should be default now
        "bluez5.enable-msbc" = true; # Default
        "bluez5.enable-hw-volume" = true; # Default
        "bluez5.headset-roles" = [
          "hsp_hs"
          "hsp_ag"
          "hfp_hf"
          "hfp_ag"
        ];
      };
    };

    security.rtkit.enable = true; # Real-time support for pipewire

    aviallon.programs.allowUnfreeList = [
      "ffmpeg-full" # Because of unfree codecs
    ];

    # Hardware-agnostic audio denoising
    systemd.user.services =
      let
        mkPipewireModule =
          { conf, description }:
          {
            unitConfig = {
              Slice = "session.slice";
            };
            serviceConfig = {
              ExecStart = [
                "${getBin config.services.pipewire.package}/bin/pipewire -c ${conf}"
              ];
              Type = "simple";
              Restart = "on-failure";
            };
            bindsTo = [ "pipewire.service" ];
            after = [ "pipewire.service" ];
            environment = {
              PIPEWIRE_DEBUG = "3";
            };
            wantedBy = [ "pipewire.service" ];
            inherit description;
          };
      in
      {
        pipewire-noise-filter = mkIf cfg.audio.noise-filter.enable (
          (mkPipewireModule {
            conf = filterConfig;
            description = "Pipewire Noise Filter";
          })
          // {
            enable = cfg.audio.noise-filter.strength > 0.0;
          }
        );
        pipewire-airplay-sink = mkIf cfg.audio.airplay.enable (mkPipewireModule {
          conf = airplayConfig;
          description = "Pipewire Airplay Sink";
        });
      };

  };
}