inputs:
{ config, lib, pkgs, ... }:
with lib;
let
  cfg = config.colors;

  pow = n: i: if i == 1 then n else if i == 0 then 1 else n * pow n (i - 1);

  alf = [ "0" "1" "2" "3" "4" "5" "6" "7" "8" "9" "a" "b" "c" "d" "e" "f" ];
  fil = c: lib.imap0 (n: x: if (lib.toLower x) == c then n else null) alf;
  fin = c: builtins.elemAt (builtins.filter (x: x != null) (fil c)) 0;
  add = l: lib.foldr ({ n, x }: c: (x * (pow 16 n)) + c) 0 (lib.imap0 (n: x: { inherit n x; }) l);
  calc = s: add (builtins.map fin (builtins.filter (x: builtins.isString x && builtins.stringLength x == 1) (builtins.split "" s)));

  splitHex = c:
    let
      s' = builtins.match "(..)(..)(..)|(.)(.)(.)" c;
      ss = builtins.elemAt s';
      o = if ss 0 == null then 3 else 0;
    in {
        r = ss (0 + o);
        g = ss (1 + o);
        b = ss (2 + o);
      };

  hexToRgb = c: builtins.mapAttrs (_: calc) (splitHex c);

  hexToAlphaCss = c: a: with hexToRgb c; "rgba(${r}, ${g}, ${b}, ${a})";

  makeScheme = base16: lib.mapAttrs' (k: v: lib.nameValuePair "${k}-hex" v) base16 //
    lib.mapAttrs' (k: v: lib.nameValuePair "${k}-hex-r" (splitHex v).r) base16 //
    lib.mapAttrs' (k: v: lib.nameValuePair "${k}-hex-g" (splitHex v).g) base16 //
    lib.mapAttrs' (k: v: lib.nameValuePair "${k}-hex-b" (splitHex v).b) base16 //
    lib.mapAttrs' (k: v: lib.nameValuePair "${k}-rgb-r" (hexToRgb v).r) base16 //
    lib.mapAttrs' (k: v: lib.nameValuePair "${k}-rgb-g" (hexToRgb v).g) base16 //
    lib.mapAttrs' (k: v: lib.nameValuePair "${k}-rgb-b" (hexToRgb v).b) base16 //
    lib.mapAttrs' (k: v: lib.nameValuePair "${k}-dec-r" ((hexToRgb v).r / 255.0)) base16 //
    lib.mapAttrs' (k: v: lib.nameValuePair "${k}-dec-g" ((hexToRgb v).g / 255.0)) base16 //
    lib.mapAttrs' (k: v: lib.nameValuePair "${k}-dec-b" ((hexToRgb v).b / 255.0)) base16;

  mustache = scheme: name: src:
    pkgs.stdenv.mkDerivation (
      {
        name = lib.strings.sanitizeDerivationName name;
        inherit src;
        data = pkgs.writeText "${name}-data" (builtins.toJSON scheme);
        phases = [ "buildPhase" ];
        buildPhase = "${pkgs.mustache-go}/bin/mustache $data $src > $out";
      }
    );

  genTheme = repo: mustache (makeScheme cfg.base16 // {
    scheme-name = cfg.favColors.name;
    scheme-slug = "idk";
    scheme-author = "nixos";
  }) cfg.favColors.name "${repo}/templates/default.mustache";
in
{
  options.colors = {
    enable = mkEnableOption "Enable automatic colors";

    i3BarColors = mkOption {
      description = "Exported color attrset for i3bar/swaybar";
      default = {};
    };

    waybarCss = mkOption {
      description = "Exported CSS for waybar";
      default = "";
    };

    base16Rgb = mkOption {
      readOnly = true;
      type = types.attrsOf (types.attrsOf types.int);
    };

    base16 = mkOption {
      readOnly = true;
      type = types.attrsOf types.str;
    };

    favColors = mkOption {
      description = "Your favourite color scheme";
      default = {};
      type = types.submodule {
        options = {
          name = mkOption {
            type = types.str;
            default = "Monokai";
            description = "Name of your color scheme";
          };
          base16 = mkOption {
            type = types.attrsOf types.str;
            default = {
              base00 = "272822";
              base01 = "383830";
              base02 = "49483e";
              base03 = "75715e";
              base04 = "a59f85";
              base05 = "f8f8f2";
              base06 = "f5f4f1";
              base07 = "f9f8f5";
              base08 = "f92672";
              base09 = "fd971f";
              base0A = "f4bf75";
              base0B = "a6e22e";
              base0C = "a1efe4";
              base0D = "66d9ef";
              base0E = "ae81ff";
              base0F = "cc6633";
            };
            description = "BASE16 color scheme";
          };
        };
      };
    };
  };

  config =
    let
      i3config = {
        config = {
          colors = {
            background = "#${cfg.favColors.base16.base07}";
            focused = {
              border = "#${cfg.favColors.base16.base05}";
              background = "#${cfg.favColors.base16.base0D}";
              text = "#${cfg.favColors.base16.base00}";
              indicator = "#${cfg.favColors.base16.base0D}";
              childBorder = "#${cfg.favColors.base16.base0D}";
            };
            focusedInactive = {
              border = "#${cfg.favColors.base16.base01}";
              background = "#${cfg.favColors.base16.base01}";
              text = "#${cfg.favColors.base16.base05}";
              indicator = "#${cfg.favColors.base16.base03}";
              childBorder = "#${cfg.favColors.base16.base01}";
            };
            unfocused = {
              border = "#${cfg.favColors.base16.base01}";
              background = "#${cfg.favColors.base16.base00}";
              text = "#${cfg.favColors.base16.base05}";
              indicator = "#${cfg.favColors.base16.base01}";
              childBorder = "#${cfg.favColors.base16.base01}";
            };
            urgent = {
              border = "#${cfg.favColors.base16.base08}";
              background = "#${cfg.favColors.base16.base08}";
              text = "#${cfg.favColors.base16.base00}";
              indicator = "#${cfg.favColors.base16.base08}";
              childBorder = "#${cfg.favColors.base16.base08}";
            };
            placeholder = {
              border = "#${cfg.favColors.base16.base00}";
              background = "#${cfg.favColors.base16.base00}";
              text = "#${cfg.favColors.base16.base05}";
              indicator = "#${cfg.favColors.base16.base00}";
              childBorder = "#${cfg.favColors.base16.base00}";
            };
          };
        };
      };

      elementTheme = {
        name = "Nix colors 11";
        is_dark = true;
        colors = {
          "accent-color" = "#${cfg.favColors.base16.base02}";
          "primary-color" = "#${cfg.favColors.base16.base08}";
          "warning-color" = "#${cfg.favColors.base16.base0F}";

          "sidebar-color" = "#${cfg.favColors.base16.base01}";
          "roomlist-background-color" = "#${cfg.favColors.base16.base00}";
          "roomlist-text-color" = "#${cfg.favColors.base16.base05}";
          "roomlist-text-secondary-color" = "${cfg.favColors.base16.base06}";
          "roomlist-highlights-color" = "#${cfg.favColors.base16.base02}";
          "roomlist-separator-color" = "#${cfg.favColors.base16.base05}";

          "timeline-background-color" = "#${cfg.favColors.base16.base00}";
          "timeline-text-color" = "#${cfg.favColors.base16.base07}";
          "timeline-text-secondary-color" = "#${cfg.favColors.base16.base05}";
          "timeline-highlights-color" = "#${cfg.favColors.base16.base02}";
          "reaction-row-button-selected-bg-color" = "#${cfg.favColors.base16.base0B}";
        };
      };

      elementConfig = {
        settingDefaults.custom_themes = [ elementTheme ];

        settingDefaults.theme = "custom-${elementTheme.name}";
        default_theme = "custom-${elementTheme.name}";

        showLabsSettings = true;
      };
    in
      mkIf cfg.enable {
        # Read only utility attributes
        colors.base16 = cfg.favColors.base16;
        colors.base16Rgb = builtins.mapAttrs hexToRgb cfg.favColors.base16;

        # Element
        xdg.configFile."Riot/config.json".text = builtins.toJSON elementConfig;
        xdg.configFile."Element/config.json".text = builtins.toJSON elementConfig;
        xdg.configFile."element_theme.json".text = builtins.toJSON elementTheme;

        # Mako
        programs.mako = {
          backgroundColor = "#${cfg.favColors.base16.base00}";
          textColor = "#${cfg.favColors.base16.base07}";
          borderColor = "#${cfg.favColors.base16.base08}";
          progressColor = "over #${cfg.favColors.base16.base0D}";
        };

        # I3/sway
        wayland.windowManager.sway = i3config;
        xsession.windowManager.i3 = i3config;
        colors.i3BarColors = {
          background = "#${cfg.favColors.base16.base00}";
          separator = "#${cfg.favColors.base16.base01}";
          statusline = "#${cfg.favColors.base16.base04}";

          focusedWorkspace = {
            border = "#${cfg.favColors.base16.base05}";
            background = "#${cfg.favColors.base16.base0D}";
            text = "#${cfg.favColors.base16.base00}";
          };
          activeWorkspace = {
            border = "#${cfg.favColors.base16.base05}";
            background = "#${cfg.favColors.base16.base03}";
            text = "#${cfg.favColors.base16.base00}";
          };
          inactiveWorkspace = {
            border = "#${cfg.favColors.base16.base03}";
            background = "#${cfg.favColors.base16.base01}";
            text = "#${cfg.favColors.base16.base05}";
          };
          urgentWorkspace = {
            border = "#${cfg.favColors.base16.base08}";
            background = "#${cfg.favColors.base16.base08}";
            text = "#${cfg.favColors.base16.base00}";
          };
          bindingMode = {
            border = "#${cfg.favColors.base16.base00}";
            background = "#${cfg.favColors.base16.base0A}";
            text = "#${cfg.favColors.base16.base00}";
          };
        };

        # Waybar
        colors.waybarCss =
          "\n" + (
            (import ../data/waybar-base16.nix)
              cfg.favColors.name
              cfg.base16
          );

        # Dunst
        services.dunst = {
          settings = {
            global = {
              frame_color = "#${cfg.favColors.base16.base09}";
              separator_color = "#${cfg.favColors.base16.base05}";
            };

            urgency_low = {
              background = "#${cfg.favColors.base16.base01}";
              foreground = "#${cfg.favColors.base16.base03}";
            };

            urgency_normal = {
              background = "#${cfg.favColors.base16.base02}";
              foreground = "#${cfg.favColors.base16.base05}";
            };

            urgency_critical = {
              background = "#${cfg.favColors.base16.base08}";
              foreground = "#${cfg.favColors.base16.base06}";
            };
          };
        };

        # Rofi
        programs.rofi.theme = "${genTheme inputs.base16-rofi}";

        # Kitty
        programs.kitty.extraConfig = ''
          include ${genTheme inputs.base16-kitty}
        '';

        # neovim
        xdg.configFile."nvim/colors/base16.vim".text = import ../data/vim-base16.nix cfg.favColors.name cfg.favColors.base16;
        programs.neovim.extraConfig = ''
          colorscheme base16
          set termguicolors
        '';

        # GTK
        gtk = {
          enable = true;
          theme =
            let
              materia_colors = pkgs.writeText "gtk-generated-colors" ''
                BG=${cfg.favColors.base16.base00}
                FG=${cfg.favColors.base16.base07}
                BTN_BG=${cfg.favColors.base16.base00}
                BTN_FG=${cfg.favColors.base16.base07}
                MENU_BG=${cfg.favColors.base16.base00}
                MENU_FG=${cfg.favColors.base16.base07}
                ACCENT_BG=${cfg.favColors.base16.base02}
                SEL_BG=${cfg.favColors.base16.base0D}
                SEL_FG=${cfg.favColors.base16.base00}
                TXT_BG=${cfg.favColors.base16.base00}
                TXT_FG=${cfg.favColors.base16.base07}
                HDR_BTN_BG=${cfg.favColors.base16.base00}
                HDR_BTN_FG=${cfg.favColors.base16.base07}
                WM_BORDER_FOCUS=${cfg.favColors.base16.base02}
                WM_BORDER_UNFOCUS=${cfg.favColors.base16.base01}
                MATERIA_STYLE_COMPACT=True
                MATERIA_COLOR_VARIANT=dark
                UNITY_DEFAULT_LAUNCHER_STYLE=False
                NAME=generated
              '';

              generated-gtk-theme = pkgs.stdenv.mkDerivation {
                name = "generated-gtk-theme";
                src = pkgs.materia-theme.src;
                buildInputs = with pkgs; [ sassc bc which inkscape optipng ];
                installPhase = ''
                  HOME=/build
                  chmod 777 -R .
                  patchShebangs .
                  mkdir -p $out/share/themes
                  substituteInPlace change_color.sh --replace "\$HOME/.themes" "$out/share/themes"
                  echo "Changing colours:"
                  ./change_color.sh -o Generated ${materia_colors}
                  chmod 555 -R .
                '';
              };
            in
              {
                name = "Generated";
                package = generated-gtk-theme;
              };
          gtk2.extraConfig = (
            (import ../data/gtk2-base16.nix)
              cfg.favColors.name
              cfg.favColors.base16
          );
        };

        # Codium/VSCODE
        programs.vscode.userSettings = {
          "workbench.colorTheme" = "nix colors";
        };

        home.file = lib.mkMerge
          [
            (
              mkIf config.programs.vscode.enable {
                ".vscode-oss/extensions/base16-1.0.0/themes/nix-colors.json".text = (import ../data/codium-base16.nix) cfg.favColors.name cfg.favColors.base16;
                ".vscode-oss/extensions/base16-1.0.0/package.json".text = builtins.toJSON {
                  name = "nix colors";
                  displayName = "Automatic Nix-generated base16 colors";
                  version = "1.0.0";
                  publisher = "colors";
                  author = {
                    name = "ezpc usr";
                    email = "usr@ezpc";
                  };
                  engines.vscode = "^1.11.1";
                  categories = "Themes";
                  contributes.themes = [
                    {
                      label = "nix colors";
                      uiTheme = "vs-dark";
                      path = "./themes/nix-colors.json";
                    }
                  ];
                };
              }
            )
          ];
      };
}