{
  config,
  pkgs,
  lib,
  ...
}:

let

  cfg = config.programs.hyprlock;

in
{
  meta.maintainers = with lib.maintainers; [
    khaneliman
    fufexan
  ];

  options.programs.hyprlock = {
    enable = lib.mkEnableOption "" // {
      description = ''
        Whether to enable Hyprlock, Hyprland's GPU-accelerated lock screen
        utility.

        Note that PAM must be configured to enable hyprlock to perform
        authentication. The package installed through home-manager will *not* be
        able to unlock the session without this configuration.

        On NixOS, it can be enabled using:

        ```nix
        security.pam.services.hyprlock = {};
        ```
      '';
    };

    package = lib.mkPackageOption pkgs "hyprlock" { nullable = true; };

    settings = lib.mkOption {
      type =
        with lib.types;
        let
          valueType =
            nullOr (oneOf [
              bool
              int
              float
              str
              path
              (attrsOf valueType)
              (listOf valueType)
            ])
            // {
              description = "Hyprlock configuration value";
            };
        in
        valueType;
      default = { };
      example = lib.literalExpression ''
        {
          general = {
            disable_loading_bar = true;
            grace = 300;
            hide_cursor = true;
            no_fade_in = false;
          };

          background = [
            {
              path = "screenshot";
              blur_passes = 3;
              blur_size = 8;
            }
          ];

          input-field = [
            {
              size = "200, 50";
              position = "0, -80";
              monitor = "";
              dots_center = true;
              fade_on_empty = false;
              font_color = "rgb(202, 211, 245)";
              inner_color = "rgb(91, 96, 120)";
              outer_color = "rgb(24, 25, 38)";
              outline_thickness = 5;
              placeholder_text = '\'<span foreground="##cad3f5">Password...</span>'\';
              shadow_passes = 2;
            }
          ];
        }
      '';
      description = ''
        Hyprlock configuration written in Nix. Entries with the same key should
        be written as lists. Variables' and colors' names should be quoted. See
        <https://wiki.hyprland.org/Hypr-Ecosystem/hyprlock/> for more examples.
      '';
    };

    extraConfig = lib.mkOption {
      type = lib.types.lines;
      default = "";
      description = ''
        Extra configuration lines to add to `~/.config/hypr/hyprlock.conf`.
      '';
    };

    sourceFirst =
      lib.mkEnableOption ''
        putting source entries at the top of the configuration
      ''
      // {
        default = true;
      };

    importantPrefixes = lib.mkOption {
      type = with lib.types; listOf str;
      default = [
        "$"
        "bezier"
        "monitor"
        "size"
      ] ++ lib.optionals cfg.sourceFirst [ "source" ];
      example = [
        "$"
        "bezier"
        "monitor"
        "size"
      ];
      description = ''
        List of prefix of attributes to source at the top of the config.
      '';
    };
  };

  config = lib.mkIf cfg.enable {
    home.packages = lib.mkIf (cfg.package != null) [ cfg.package ];

    xdg.configFile."hypr/hyprlock.conf" =
      let
        shouldGenerate = cfg.extraConfig != "" || cfg.settings != { };
      in
      lib.mkIf shouldGenerate {
        text =
          lib.optionalString (cfg.settings != { }) (
            lib.hm.generators.toHyprconf {
              attrs = cfg.settings;
              inherit (cfg) importantPrefixes;
            }
          )
          + lib.optionalString (cfg.extraConfig != null) cfg.extraConfig;
      };
  };
}
