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

let
  cfg = config.theme;
in
{
  # https://github.com/Theaninova/TheaninovOS/blob/master/modules/home-manager/theme/md3-evo.nix
  options.theme = with lib; with types; {
    enable = mkEnableOption "theme";

    configDir = mkOption {
      type = str;
      default = "${config.xdg.configHome}/theme";
      description = "The path to the theme config directory.";
    };

    wallpaper = mkOption {
      type = path;
      description = "The path to the default wallpaper";
    };

    extraConfig = mkOption {
      type = lines;
      default = "";
      description = "Extra configuration lines to add to the theme script.";
    };

    flavour = mkOption {
      type = enum [
        "content"
        "expressive"
        "fidelity"
        "fruit-salad"
        "monochrome"
        "neutral"
        "rainbow"
        "tonal-spot"
      ];
      default = "tonal-spot";
      description = "The flavour of the theme.";
    };

    contrast = mkOption {
      type = numbers.between (-1) 1;
      default = 0;
      description = "Use a modified contrast.";
    };

    opacity = mkOption {
      type = numbers.between 0 1;
      default = 1;
      description = "The opacity of apps.";
    };

    radius = mkOption {
      type = ints.unsigned;
      default = 24;
      description = "The radius of corners.";
    };

    padding = mkOption {
      type = ints.unsigned;
      default = 12;
      description = "The padding of windows.";
    };

    blur = mkOption {
      type = ints.unsigned;
      default = 0;
      description = "The blur amount of windows.";
    };

    color = {
      semantic = {
        blend = mkOption {
          type = bool;
          default = false;
          description = "Blend the colors.";
        };

        danger = mkOption {
          type = str;
          default = "#ff0000";
          description = "The color of danger.";
        };

        warning = mkOption {
          type = str;
          default = "#ffff00";
          description = "The color of warning.";
        };

        success = mkOption {
          type = str;
          default = "#00ff00";
          description = "The color of success.";
        };

        info = mkOption {
          type = str;
          default = "#0000ff";
          description = "The color of info.";
        };
      };

      syntax = {
        blend = mkOption {
          type = bool;
          default = true;
          description = "Blend the colors.";
        };

        keywords = mkOption {
          type = str;
          default = "#ff8000";
          description = "The color of keywords.";
        };

        functions = mkOption {
          type = str;
          default = "#0000ff";
          description = "The color of functions.";
        };

        properties = mkOption {
          type = str;
          default = "#ff00ff";
          description = "The color of properties.";
        };

        constants = mkOption {
          type = str;
          default = "#ff00ff";
          description = "The color of constants.";
        };

        strings = mkOption {
          type = str;
          default = "#00ff00";
          description = "The color of variables.";
        };

        numbers = mkOption {
          type = str;
          default = "#00ffff";
          description = "The color of numbers.";
        };

        structures = mkOption {
          type = str;
          default = "#ffff00";
          description = "The color of structures.";
        };

        types = mkOption {
          type = str;
          default = "#00ffff";
          description = "The color of types.";
        };
      };

      ansi = {
        blend = mkOption {
          type = bool;
          default = true;
          description = "Blend the colors.";
        };

        red = mkOption {
          type = str;
          default = "#ff0000";
          description = "The color of red.";
        };

        green = mkOption {
          type = str;
          default = "#00ff00";
          description = "The color of green.";
        };

        yellow = mkOption {
          type = str;
          default = "#ffff00";
          description = "The color of yellow.";
        };

        orange = mkOption {
          type = str;
          default = "#ff8000";
          description = "The color of orange.";
        };

        blue = mkOption {
          type = str;
          default = "#0000ff";
          description = "The color of blue.";
        };

        magenta = mkOption {
          type = str;
          default = "#ff00ff";
          description = "The color of magenta.";
        };

        cyan = mkOption {
          type = str;
          default = "#00ffff";
          description = "The color of cyan.";
        };
      };
    };

    cursor = {
      package = mkOption {
        type = package;
        default = pkgs.gnome.adwaita-icon-theme;
        description = "The package providing the cursor theme.";
      };

      name = mkOption {
        type = str;
        default = "Adwaita";
        description = "The cursor name within the package.";
      };

      size = mkOption {
        type = ints.positive;
        default = 32;
        description = "The cursor size.";
      };
    };
  };

  config =
    let
      name = "theme-init";
      init = pkgs.writeShellApplication {
        inherit name;
        runtimeInputs = with pkgs; [ coreutils-full ];
        text =
          let
            wallpaperPath = "${cfg.configDir}/wallpaper";
          in
          ''
            if [ ! -L "${wallpaperPath}" ]; then
              ln -sf "${cfg.wallpaper}" "${wallpaperPath}"
            fi

            ${cfg.extraConfig}
          '';
      };
    in
    lib.mkIf cfg.enable {
      home = {
        packages = [ init ];

        pointerCursor = {
          inherit (cfg.cursor) package name size;
          gtk.enable = true;
          x11.enable = true;
        };
      };

      wayland.windowManager.hyprland.settings.exec-once = "${init}/bin/${name}";
    };
}