{ config, pkgs, lib, options, ... }:
with builtins // lib;
let
  cfg = config.plato;
  toml = pkgs.formats.toml {};
  # importOption = p: (import p { inherit pkgs lib; } cfg.path).option;
in {
  options.plato = {
    enable = mkEnableOption "Plato";

    package = mkPackageOption pkgs "plato" {};

    path = mkOption {
      type = types.str;
      readOnly = true;
      internal = true;
      default = ".adds/plato";
    };

    devicePath = mkOption {
      type = types.str;
      readOnly = true;
      internal = true;
      default = "/mnt/onboard/${cfg.path}";
    };

    _allFiles = mkOption {
      type = types.package;
      readOnly = true;
      internal = true;
      default = (pkgs.callPackage ../lib/merge-files.nix {}) ([
        cfg.package
      ] ++ attrValues cfg.file);
    };

    file = mkOption {
      default = {};
      type = types.attrsOf (types.submodule (pkgs.callPackage ../lib/file-type.nix {}));
    };

    nickel = {
      enable = mkEnableOption "Add NickelMenu option" // { default = true; };
    };


    settings = mkOption {
      type = toml.type;
      default = {};
      description = ''
        Contents of Settings.toml
      '';
    };

    config = {
      hyphenation = mkEnableOption "hyphenation" // { default = true; };
      convertDictionaries = mkEnableOption "convert StartDict" // { default = true; };
      setFramebufferDepth = mkEnableOption "set framebuffer's depth" // { default = true; };
      extra = mkOption {
        type = types.lines;
        default = "";
      };
    };
    #   mkOption {
    #   type = types.lines;
    #   default = "";
    #   description = ''
    #     Contents of config.sh
    #   '';
    # };

    dictionaries = mkOption {
      type = with types; listOf package;
      default = [];
    };

    _dictionariesCombined = mkOption {
      type = types.package;
      readOnly = true;
      internal = true;
      default =
      let
        copyDicts = pkg: ''
          find ${pkg}/share/dictd/ -type f -regex '.*\.\(dict\(\.dz\)?\|index\)' -exec cp -v {} $out/ \;
        '';
      in pkgs.runCommandLocal "plato-dictionaries" {} ''
        mkdir $out
        ${concatMapStringsSep "\n" copyDicts cfg.dictionaries}
      '';
    };

    fonts = mkOption {
      type = with types; listOf package;
      default = [];
    };

    _fontsCombined = mkOption {
      type = types.package;
      readOnly = true;
      internal = true;
      default =
      let
        copyFonts = pkg: ''
          find ${pkg}/share/fonts/truetype/ -type f -regex '.*\.\(ttf\|otf\)' -exec cp -v {} $out/ \;
        '';
      in pkgs.runCommandLocal {} ''
        mkdir $out
        ${concatMapStringsSep "\n" copyFonts cfg.fonts}
      '';
    };
  };

  config = mkMerge [
    {
      plato.file = {
        "Settings.toml" = mkIf (cfg.settings != {}) {
          source = toml.generate "Settings.toml" cfg.settings;
        };

        "config.sh" =
        let
          c =  optional (!cfg.config.convertDictionaries) "unset PLATO_CONVERT_DICTIONARIES"
            ++ optional (!cfg.config.setFramebufferDepth) "unset PLATO_SET_FRAMEBUFFER_DEPTH"
            ++ optional (!cfg.config.hyphenation) "[ -d hyphenation-patters ] && rm -rf hyphenation-patterns"
            ++ optional (cfg.config.extra != "") cfg.config.extra
          ;
        in mkIf (c != []) {
          text = concatStringsSep "\n\n" c;
        };

        "_dictionaries" = {
          target = "dictionaries";
          source = cfg._dictionariesCombined;
        };

        "_fonts" = {
          target = "fonts";
          source = cfg._fontsCombined;
        };
      };

      nickel.menu.item = mkIf (cfg.enable && cfg.nickel.enable) {
        plato = singleton {
          location = "main";
          label = "Plato";
          action = "cmd_spawn";
          arg = [
            "quiet"
            "exec ${cfg.devicePath}/plato.sh"
          ];
        };
      };
    }
    # (mkIf (cfg.enable && cfg.nickelEntry.enable {
    #   nickel.menu.item =
    # })
  ];
}


#   imports = [
#     ./nickel.nix
#   ];

#   options.plato = {
#     enable = mkEnableOption "Plato";

#     path = mkOption {
#       type = types.str;
#       default = ".adds/plato";
#       description = "Relative path to Plato within src";
#     };

#     devPath = mkOption {
#       type = types.str;
#       default = "/mnt/onboard/${cfg.path}";
#       readOnly = true;
#       internal = true;
#     };

#     file = importOption ./lib/file.nix;
#     manifest = importOption ./lib/manifest.nix;

#     # file = mkOption {
#     #   type = options.file.type;
#     #   default = {};
#     #   description = "Files relative to ${cfg.path}";
#     # };

#     # manifest = mkOption {
#     #   type = options.manifest.type;
#     #   default = {};
#     #   description = "Manifest relative to ${cfg.path}";
#     # };

#     nickelEntry = mkEnableOption "Launch Plato directly from nickelMenu";

#     config = mkOption {
#       type = types.lines;
#       default = "";
#       description = "Plato config.sh";
#     };

#     hyphenation = mkEnableOption "hyphenation" // { default = true; };

#     convertDictionaries = mkEnableOption "convert StarDict" // { default = true; };

#     setFramebufferDepth = mkEnableOption "set framebuffer's depth" // { default = true; };

#     settings = mkOption {
#       type = toml.type;
#       default = {};
#       description = "Plato Settings.toml";
#     };

#     css = mkOption {
#       default = {};
#       type = with types; attrsOf lines;
#       description = ''
#         css style sheets.
#         Only use this for epub-user dictionary-user html-user
#       '';
#     };

#     scripts = mkOption {
#       default = {};
#       type = with types; attrsOf lines;
#       description = ''
#         Only use this for wifi-post-up wifi-post-down wifi-pre-up wifi-pre-down.
#       '';
#       # apply = mapAttrs (_: text: ''
#       #   #!/bin/sh

#       #   ${text}
#       # '')
#     };

#     dictionaries = mkOption {
#       type = with types; listOf package;
#       default = [];
#     };

#     allDictionaries = mkOption {
#       type = types.package;
#       readOnly = true;
#       internal = true;
#       default =  pkgs.runCommand "PlatoDictionaries" {} (''
#       mkdir -p $out
#       '' + concatMapStringsSep "\n" (pkg: ''
#       find ${pkg}/share/dictd/ -type f -regex '.*\.\(dict\(\.dz\)?\|index\)' -exec cp -v {} $out/ \;
#       '') cfg.dictionaries
#       );

#     };

#     fonts = mkOption {
#       type = with types; listOf package;
#       default = [];
#     };

#     allFonts = mkOption {
#       type = types.package;
#       readOnly = true;
#       internal = true;
#       default = pkgs.runCommand "PlatoFonts" {} (''
#       mkdir -p $out
#       '' + concatMapStringsSep "\n" (pkg: ''
#       find ${pkg}/share/fonts/truetype/ -type f -regex '.*\.\(ttf\|otf\)' -exec cp -v {} $out/ \;
#       '') cfg.fonts
#       );

#     };
#   };

#   config = mkIf cfg.enable {
#     plato = {
#       config = concatStringsSep "\n\n" (
#         optional (!cfg.convertDictionaries) ''
#           unset PLATO_CONVERT_DICTIONARIES
#         ''
#         ++
#         optional (!cfg.setFramebufferDepth) ''
#           unset PLATO_SET_FRAMEBUFFER_DEPTH
#         ''
#         ++
#         optional (!cfg.hyphenation) ''
#           [ -d hyphenation-patterns ] && rm -rf hyphenation-patterns
#         ''
#       );
#       file = mkMerge [
#         (mkIf (cfg.settings != {}) {
#           "Settings.toml".source = toml.generate "Settings.toml" cfg.settings;
#         })

#         (mkIf (cfg.config != "") {
#           "config.sh".text = cfg.config;
#         })

#         (mapAttrs' (n: text:
#         let
#           n1 = if hasPrefix "css/" n then n else "css/${n}";
#           name = if hasSuffix ".css" n1 then n1 else "{n1}.css";
#         in {
#           inherit name;
#           value = { inherit text; };
#         }) cfg.css)

#         (mapAttrs' (n: t:
#         let
#           n1 = if hasPrefix "scripts/" n then n else "scripts/${n}";
#           name = if hasSuffix ".sh" n1 then n1 else "${n1}.sh";
#           text = if hasPrefix "#!/" t then t else "#!/bin/sh\n\n${t}";
#         in {
#           inherit name;
#           value = { inherit text; };
#         }) cfg.scripts)

#         {
#           dictionaries = {
#             # directory = true;
#             source = cfg.allDictionaries;
#           };
#           fonts = {
#             # directory = true;
#             source = cfg.allFonts;
#           };
#         }
#       ];

#       manifest = {
#         "config-sample.sh".mergeTool = _: _: "echo 'not copying config-sample.sh'";
#         "Settings-sample.toml".mergeTool = _: _: "echo 'not copying Settings-sample.toml'";
#       };
#     };

#     # file = mapAttrs' (n: v: {
#     #   name = "plato-${n}";
#     #   value = v // {
#     #     target = "${cfg.path}/${v.target}";
#     #   };
#     # }) cfg.file;

#     # manifest = mapAttrs' (n: v: {
#     #   name = "plato-${n}";
#     #   value = v // {
#     #     targets = map (x: "${cfg.path}/${x}") v.targets;
#     #   };
#     # }) cfg.manifest;

#     nickel.menu.item = mkIf cfg.nickelEntry {
#       plato = singleton {
#         location = "main";
#         label = "Plato";
#         action = "cmd_spawn";
#         arg = [
#           "quiet"
#           "exec ${cfg.devPath}/plato.sh"
#         ];
#       };
#     };

#   };
# }