{
  pkgs,
  config,
  lib,
  ...
}:
with lib; let
  cfg = config.plugins.harpoon;
  helpers = import ../helpers.nix {inherit lib;};

  projectConfigModule = types.submodule {
    options = {
      termCommands = helpers.mkNullOrOption (types.listOf types.str) ''
        List of predefined terminal commands for this project.
      '';

      marks = helpers.mkNullOrOption (types.listOf types.str) ''
        List of predefined marks (filenames) for this project.
      '';
    };
  };
in {
  options.plugins.harpoon =
    helpers.extraOptionsOptions
    // {
      enable = mkEnableOption "harpoon";

      package = helpers.mkPackageOption "harpoon" pkgs.vimPlugins.harpoon;

      keymapsSilent = mkOption {
        type = types.bool;
        description = "Whether harpoon keymaps should be silent.";
        default = false;
      };

      keymaps = {
        addFile = helpers.mkNullOrOption types.str ''
          Keymap for marking the current file.";
        '';

        toggleQuickMenu = helpers.mkNullOrOption types.str ''
          Keymap for toggling the quick menu.";
        '';

        navFile = helpers.mkNullOrOption (types.attrsOf types.str) ''
          Keymaps for navigating to marks.

          Examples:
          navFile = {
            "1" = "<C-j>";
            "2" = "<C-k>";
            "3" = "<C-l>";
            "4" = "<C-m>";
          };
        '';

        navNext = helpers.mkNullOrOption types.str ''
          Keymap for navigating to next mark.";
        '';

        navPrev = helpers.mkNullOrOption types.str ''
          Keymap for navigating to previous mark.";
        '';

        gotoTerminal = helpers.mkNullOrOption (types.attrsOf types.str) ''
          Keymaps for navigating to terminals.

          Examples:
          gotoTerminal = {
            "1" = "<C-j>";
            "2" = "<C-k>";
            "3" = "<C-l>";
            "4" = "<C-m>";
          };
        '';

        cmdToggleQuickMenu = helpers.mkNullOrOption types.str ''
          Keymap for toggling the cmd quick menu.
        '';

        tmuxGotoTerminal = helpers.mkNullOrOption (types.attrsOf types.str) ''
          Keymaps for navigating to tmux windows/panes.
          Attributes can either be tmux window ids or pane identifiers.

          Examples:
          tmuxGotoTerminal = {
            "1" = "<C-1>";
            "2" = "<C-2>";
            "{down-of}" = "<leader>g";
          };
        '';
      };

      saveOnToggle = helpers.defaultNullOpts.mkBool false ''
        Sets the marks upon calling `toggle` on the ui, instead of require `:w`.
      '';

      saveOnChange = helpers.defaultNullOpts.mkBool true ''
        Saves the harpoon file upon every change. disabling is unrecommended.
      '';

      enterOnSendcmd = helpers.defaultNullOpts.mkBool false ''
        Sets harpoon to run the command immediately as it's passed to the terminal when calling `sendCommand`.
      '';

      tmuxAutocloseWindows = helpers.defaultNullOpts.mkBool false ''
        Closes any tmux windows harpoon that harpoon creates when you close Neovim.
      '';

      excludedFiletypes = helpers.defaultNullOpts.mkNullable (types.listOf types.str) "['harpoon']" ''
        Filetypes that you want to prevent from adding to the harpoon list menu.
      '';

      markBranch = helpers.defaultNullOpts.mkBool false ''
        Set marks specific to each git branch inside git repository.
      '';

      projects = mkOption {
        default = {};
        description = ''
          Predefined projetcs. The keys of this attrs should be the path to the project.
          $HOME is working.
        '';
        example = ''
          projects = {
            "$HOME/personal/vim-with-me/server" = {
              term.cmds = [
                  "./env && npx ts-node src/index.ts"
              ];
            };
          };
        '';
        type = types.attrsOf projectConfigModule;
      };

      menu = {
        width = helpers.defaultNullOpts.mkInt 60 ''
          Menu window width
        '';

        height = helpers.defaultNullOpts.mkInt 10 ''
          Menu window height
        '';

        borderChars =
          helpers.defaultNullOpts.mkNullable (types.listOf types.str)
          "[ \"─\" \"│\" \"─\" \"│\" \"╭\" \"╮\" \"╯\" \"╰\" ]"
          "Border characters";
      };
    };

  config = let
    projects =
      builtins.mapAttrs
      (
        name: value: {
          term.cmds = value.termCommands;
          mark.marks = map (mark: {filename = mark;}) value.marks;
        }
      )
      cfg.projects;

    options =
      {
        global_settings = {
          save_on_toggle = cfg.saveOnToggle;
          save_on_change = cfg.saveOnChange;
          enter_on_sendcmd = cfg.enterOnSendcmd;
          tmux_autoclose_windows = cfg.tmuxAutocloseWindows;
          excluded_filetypes = cfg.excludedFiletypes;
          mark_branch = cfg.markBranch;
        };

        inherit projects;

        menu = {
          inherit (cfg.menu) width height;
          borderchars = cfg.menu.borderChars;
        };
      }
      // cfg.extraOptions;
  in
    mkIf cfg.enable {
      extraPlugins = [cfg.package];

      extraConfigLua = ''
        require('harpoon').setup(${helpers.toLuaObject options})
      '';

      maps.normal = let
        silent = cfg.keymapsSilent;
        km = cfg.keymaps;

        simpleMappings = mkMerge (
          mapAttrsToList
          (
            optionName: luaFunc: let
              key = km.${optionName};
            in
              mkIf (key != null) {
                ${key} = {
                  action = luaFunc;
                  lua = true;
                  inherit silent;
                };
              }
          )
          {
            addFile = "require('harpoon.mark').add_file";
            toggleQuickMenu = "require('harpoon.ui').toggle_quick_menu";
            navNext = "require('harpoon.ui').nav_next";
            navPrev = "require('harpoon.ui').nav_prev";
            cmdToggleQuickMenu = "require('harpoon.cmd-ui').toggle_quick_menu()";
          }
        );

        mkNavMappings = name: genLuaFunc: let
          mappingsAttrs = km.${name};
        in
          mkIf
          (mappingsAttrs != null)
          (
            mapAttrs'
            (id: key: {
              name = key;
              value = {
                action = genLuaFunc id;
                lua = true;
                inherit silent;
              };
            })
            mappingsAttrs
          );
      in
        mkMerge [
          simpleMappings
          (
            mkNavMappings
            "navFile"
            (id: "function() require('harpoon.ui').nav_file(${id}) end")
          )
          (
            mkNavMappings
            "gotoTerminal"
            (id: "function() require('harpoon.term').gotoTerminal(${id}) end")
          )
          (
            mkNavMappings
            "tmuxGotoTerminal"
            (id: "function() require('harpoon.tmux').gotoTerminal(${id}) end")
          )
        ];
    };
}