{ config, pkgs, inputs, ... }:

{
  imports = [
    ./hardware-configuration.nix
    inputs.noctalia-greeter.nixosModules.default
  ];

  # Custom EDID firmware loading for monitor
  hardware.firmware = [
    (pkgs.runCommand "custom-edid" {} ''
      mkdir -p $out/lib/firmware/edid
      cp ${./mi_edid.bin} $out/lib/firmware/edid/mi_edid.bin
    '')
  ];

  fileSystems."/mnt/giga" = {
    device = "/dev/disk/by-uuid/bfed3a37-05e1-465b-a4b7-d74cd31bf937";
    fsType = "ext4";
    options = [ "defaults" "user" "rw" ];
  };

  # --- Mullvad VPN daemon ---
  services.mullvad-vpn = {
    enable = true;
    package = pkgs.mullvad-vpn;
  };

  services.resolved = {
    enable = true;
    dnssec = "true";
    dnsovertls = "true";
    domains = [ "~." ];
    settings = {
      Resolve = {
        DNS = "194.242.2.4#base.dns.mullvad.net 2a07:e340::4#base.dns.mullvad.net";
        FallbackDNS = "";
      };
    };
  };

  # Restrict systemd log size and retention
  services.journald.extraConfig = ''
    SystemMaxUse=50M
    MaxRetentionSec=1month
  '';

  # --- AUTOSTART USER SERVICES ---
  systemd.user.services.swingmusic = {
    description = "Swing Music Local Server";
    wantedBy = [ "graphical-session.target" ];
    after = [ "graphical-session.target" ];
    serviceConfig = {
      ExecStart = "/home/seraphim/.swingmusic/swingmusic";
      Restart = "on-failure";
      WorkingDirectory = "/home/seraphim";
      # --- Systemd Hardening Options ---
      NoNewPrivileges = true;
      PrivateTmp = true;
      ProtectSystem = "strict";
      ProtectHome = "false";    
      RestrictAddressFamilies = [ "AF_INET" "AF_INET6" ];
    };
  };

  # --- MPD-MPRIS (Для работы Waybar) ---
  systemd.user.services.mpd-mpris = {
    description = "MPD MPRIS Service for Waybar";
    wantedBy = [ "default.target" ];
    after = [ "graphical-session.target" ];
    serviceConfig = {
      ExecStart = "${pkgs.mpd-mpris}/bin/mpd-mpris -network tcp -host 127.0.0.1 -port 6600";
      Restart = "on-failure";
    };
  };

  systemd.user.services.niri.enableDefaultPath = false;
  qt = {
    enable = true;
    platformTheme = "qt5ct";
    style = "breeze";
  };

  boot.kernelParams = [
    "drm.edid_firmware=DP-1:edid/mi_edid.bin"
    "video=DP-1:2560x1440@180"
  ];

  # Bootloader configuration (systemd-boot)
  boot.loader.systemd-boot.enable = true;
  boot.loader.efi.canTouchEfiVariables = true;

  # --- NETWORK AND ENCRYPTED DNS ---
  networking.hostName = "opus";
  networking.networkmanager.enable = true;

  # --- TIMEZONE AND LOCALIZATION ---
  time.timeZone = "Etc/GMT-7";
  i18n.defaultLocale = "en_US.UTF-8";

  # Forcing all extra locales to English to clear the Perl warnings
  i18n.extraLocaleSettings = {
    LC_ADDRESS = "en_US.UTF-8";
    LC_IDENTIFICATION = "en_US.UTF-8";
    LC_MEASUREMENT = "en_US.UTF-8";
    LC_MONETARY = "en_US.UTF-8";
    LC_NAME = "en_US.UTF-8";
    LC_NUMERIC = "en_US.UTF-8";
    LC_PAPER = "en_US.UTF-8";
    LC_TELEPHONE = "en_US.UTF-8";
    LC_TIME = "en_US.UTF-8";
  };

  # Allow unfree packages (NVIDIA, Steam, etc.)
  nixpkgs.config.allowUnfree = true;

  # Experimental Nix features
  nix.settings.experimental-features = [ "nix-command" "flakes" ];

  # Dynamic binary execution & FHS environment compatibility
  programs.nix-ld.enable = true;
  services.envfs.enable = true;

  # Shell and CLI enhancements
  programs.starship.enable = true;

  # Throne configuration
  programs.throne = {
    enable = true;
    tunMode.enable = true;
  };

  # Privilege elevation (doas)
  security.doas.enable = true;
  security.doas.extraRules = [
    {
      users = [ "seraphim" ];
      keepEnv = true;
      persist = true;
    }
  ];

  # --- GRAPHICS AND NVIDIA ---
  hardware.graphics.enable = true;
  hardware.graphics.enable32Bit = true;
  services.xserver.videoDrivers = [ "nvidia" ];
  hardware.nvidia = {
    modesetting.enable = true;
    powerManagement.enable = false;
    open = false;
    nvidiaSettings = true;
    package = config.boot.kernelPackages.nvidiaPackages.latest;
  };

  # --- NIRI WAYLAND COMPOSITOR ---
  programs.niri.enable = true;

  # --- NOCTALIA GREETER ---
  programs.noctalia-greeter = {
    enable = true;
    settings = {
      cursor = {
        theme = "Bibata-Modern-Ice";
        size = 24;
        path = "${pkgs.bibata-cursors}/share/icons";
       };
     };
   };

  # --- SYSTEM SERVICES FOR FILE MANAGEMENT ---
  services.gvfs.enable = true;
  services.tumbler.enable = true;
  services.gnome.gnome-keyring.enable = true;
  programs.dconf.enable = true;

  # --- XDG DESKTOP PORTALS (NIRI / WAYLAND) ---
  xdg.portal = {
    enable = true;
    extraPortals = [
      pkgs.xdg-desktop-portal-gnome
      pkgs.xdg-desktop-portal-gtk
    ];
  };

  # --- AUDIO (PIPEWIRE) ---
  security.rtkit.enable = true;
  services.pipewire = {
    enable = true;
    alsa.enable = true;
    alsa.support32Bit = true;
    pulse.enable = true;
  };
  fonts.fontconfig.enable = true;

  environment.variables = {
    SSL_CERT_FILE = "/etc/ssl/certs/ca-certificates.crt";
    NIX_SSL_CERT_FILE = "/etc/ssl/certs/ca-certificates.crt";
  };

  # --- GAMING (STEAM) ---
  programs.steam = {
    enable = true;
    remotePlay.openFirewall = true;
    dedicatedServer.openFirewall = true;
  };

  # --- ENVIRONMENT VARIABLES FOR WAYLAND + NVIDIA ---
  environment.sessionVariables = {
    LIBVA_DRIVER_NAME = "nvidia";
    XCURSOR_THEME = "Bibata-Modern-Ice";
    XCURSOR_SIZE = "20";
    # GBM_BACKEND = "nvidia-drm";
    __GLX_VENDOR_LIBRARY_NAME = "nvidia";
    NIXOS_OZONE_WL = "1";
    CC = "gcc";
    ELECTRON_OZONE_PLATFORM_HINT = "auto";
    GSK_RENDERER = "ngl";
    QT_QPA_PLATFORM = "wayland;xcb";
    QT_ENABLE_HIGHDPI_SCALING = "1";
    QT_AUTO_SCREEN_SCALE_FACTOR = "1";
    QT_SCREEN_SCALE_FACTORS = "1.5";
  };

  # --- FONTS ---
  fonts.packages = with pkgs;
  [
    font-awesome
    nerd-fonts.jetbrains-mono
    nerd-fonts.symbols-only
    jetbrains-mono
  ];

  # --- USER CONFIGURATION ---
  users.users."seraphim" = {
    isNormalUser = true;
    description = "seraphim";
    extraGroups = [ "networkmanager" "wheel" ];
    packages = with pkgs; [];
  };

  programs.fish = {
    enable = true;
    shellAliases = {
      ls = "eza -al --icons=auto";
      ll = "eza -al --icons=auto";
    };
  };

# --- MPD SERVER ---
  services.mpd = {
    enable = true;
    user = "seraphim";
    musicDirectory = "/mnt/giga/music";
    network.listenAddress = "any";
    network.port = 6600;
    
    settings = {
      auto_update = "yes";
      
      audio_output = [
        {
          type = "pulse";              # Возвращаем pulse
          name = "PipeWire Output";
          mixer_type = "hardware";     # Моментальная регулировка потока!
        }
      ];
    };
  };

  # Разрешаем системному MPD видеть звук пользователя seraphim
  systemd.services.mpd.environment = {
      XDG_RUNTIME_DIR = "/run/user/1000"; # 1000 — это ID твоего пользователя
  };

 # --- SYSTEM PACKAGES ---
  environment.systemPackages = with pkgs;
  [
    inputs.noctalia.packages.${pkgs.stdenv.hostPlatform.system}.default
    (pkgs.btop.override { cudaSupport = true; })
    
    # Terminals & Shell Utilities
    fastfetch
    fzf
    ghostty
    kitty
    ghfetch
    cacert
    
    # Music
    pkgs.mpd
    pkgs.rmpc
    mpc
    playerctl
    pkgs.mpd-mpris # <-- ДОБАВЛЕНО СЮДА
    
    # Text Editors
    micro
    neovim
    (pkgs.emacs-pgtk.override {
      withNativeCompilation = true;
    })
    # File Managers & Archiving
    nautilus
    loupe
    sushi
    file-roller
    yazi
    kdePackages.ark
    kdePackages.qt6ct
    stow
    # Utils
    cryptsetup
    util-linux
    eza
    pkgs.yt-dlp
    pkgs.caligula
    
    # GStreamer codecs
    gst_all_1.gst-plugins-base
    gst_all_1.gst-plugins-good
    gst_all_1.gst-plugins-bad
    gst_all_1.gst-plugins-ugly

    # Wayland & Niri Desktop Tools
    cliphist
    bibata-cursors
    fuzzel
    grim
    hyprpolkitagent
    noctalia-shell
    slurp
    wl-clipboard
    wtype
    xwayland-satellite

    # Audio & Brightness Controls
    brightnessctl
    pamixer
    pavucontrol

    # Desktop Applications
    keepassxc
    telegram-desktop
    vesktop
    nvidia-vaapi-driver
    pkgs.opencode
    pkgs.claude-code
    
    # Software Development & Toolchains
    black
    cargo
    clang
    clippy
    git
    pyright
    python3
    rust-analyzer
    rustc
    gnumake
    tree-sitter
    nodejs
  ];

  system.stateVersion = "26.05";
}