{
  lib,
  helpers,
  ...
}: let
  inherit
    (lib)
    map
    mapAttrsToList
    toUpper
    substring
    mapCartesianProduct
    toLower
    ;

  inherit (lib.marleyvim) keys;
  inherit (helpers) mkRaw;
in {
  globals = {
    mapleader = " ";
    maplocalleader = "\\";
  };

  keymaps =
    #
    # Disable Arrow Key Movement - - - - - - - - - - - - - - - - - - - - - - - -
    (map (d: keys.mk' ["i" "n"] d "<NOP>") ["<DOWN>" "<UP>" "<LEFT>" "<RIGHT>"])
    #
    # Better Up/Down - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
    ++ (
      mapAttrsToList
      (d: k:
        keys.mkWithOpts ["n" "x"] k "v:count == 0 ? 'g${k}' : '${k}'" d
        {
          expr = true;
          silent = true;
        })
      {
        Down = "j";
        Up = "k";
      }
    )
    #
    # Resize Windows - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
    ++ (
      mapAttrsToList
      (
        k: d: let
          s =
            if (d == "Increase")
            then "+"
            else "-";
        in
          keys.mk ["n"] "<C-${k}>" "<CMD>resize ${s}4<CR>" "${d} Window Height"
      )
      {
        Up = "Increase";
        Down = "Decrease";
        Left = "Decrease";
        Right = "Increase";
      }
    )
    #
    # Buffers - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
    ++ (
      mapAttrsToList (
        k: d: let
          # previous -> Prev
          prettyDir = (toUpper (substring 0 1 d)) + (substring 1 3 d);
        in
          keys.mk ["n"] k "<CMD>b${d}<CR>" "${prettyDir} Buffer"
      )
      {
        "<S-H>" = "previous";
        "<S-L>" = "next";
        "[b" = "previous";
        "]b" = "next";
      }
    )
    ++ [(keys.mk ["n"] "<LEADER>bD" "<CMD>bd<CR>" "Delete Buffer and Window")]
    #
    # Clear Search/Diff Update/Redraw - - - - - - - - - - - - - - - - - - - - -
    ++ [
      (keys.mk ["i" "n"] "<ESC>" "<CMD>noh<CR><ESC>" "Escape and Clear hlsearch")
      (
        keys.mk ["n"] "<LEADER>ur"
        "<CMD>nohlsearch<BAR>diffupdate<BAR>normal! <C-l><CR>"
        "Redraw / Clear hlsearch / Diff Update"
      )
    ]
    #
    # Better n & N - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
    ++ (
      mapCartesianProduct (
        {
          m,
          d,
        }: let
          k =
            if (d == "Next")
            then "n"
            else "N";
          nn =
            if (d == "Next")
            then "Nn"
            else "nN";
          zv =
            if (m == "n")
            then ".'zv'"
            else "";
        in
          keys.mkWithOpts [m] k "'${nn}'[v:searchforward]${zv}"
          "${d} Search Result" {expr = true;}
      )
      {
        m = ["n" "x" "o"];
        d = ["Next" "Prev"];
      }
    )
    #
    # Undo Break-Points - - - - - - - - - - - - - - - - - - - - - - - - - - - -
    ++ (map (c: keys.mk' ["i"] c "${c}<C-g>u") ["," "." ";"])
    #
    # Search Docs (keywordprog) - - - - - - - - - - - - - - - - - - - - - - - -
    # https://til.codeinthehole.com/posts/about-how-to-use-keywordprg-effectively/
    ++ [(keys.mk ["n"] "<LEADER>K" "<CMD>norm! K<CR>" "Search <KEYWORDPROG> for word")]
    #
    # Better Indenting - - - - - - - - - - - - - - - - - - - - - - - - - - - -
    ++ (map (c: keys.mk' ["v"] c "${c}gv") ["<" ">"])
    #
    # Commenting - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
    ++ (
      mapAttrsToList (
        k: d:
          keys.mk ["n"] "gc${k}" "${k}<ESC>Vcx<ESC><CMD>normal gcc<CR>fxa<BS>"
          "Add Comment ${d}"
      )
      {
        o = "Below";
        O = "Above";
      }
    )
    #
    # New File - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
    ++ [(keys.mk ["n"] "<LEADER>fn" "<CMD>enew<CR>" "New File")]
    #
    # Locations/Quickfixes - - - - - - - - - - - - - - - - - - - - - - - - - - -
    ++ [
      (keys.mk ["n"] "<LEADER>xl" "<CMD>lopen<CR>" "Location List")
      (keys.mk ["n"] "<LEADER>xq" "<CMD>copen<CR>" "Quickfix list")
    ]
    ++ (
      mapAttrsToList (
        k: d: let
          cmd = substring 0 4 (toLower d);
        in
          keys.mk ["n"] "${k}q" "<CMD>c${cmd}<CR>" "${d} Quickfix"
      )
      {
        "[" = "Previous";
        "]" = "Next";
      }
    )
    #
    # Diagnostics - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
    ++ [
      (keys.mk ["n"] "<LEADER>cd" (
        mkRaw
        # lua
        "function() vim.diagnostic.open_float() end"
      ) "Line Diagnostics")
    ]
    ++ (
      mapCartesianProduct (
        {
          dir,
          key,
        }: let
          kmap = "${
            if (dir == "Next")
            then "]"
            else "["
          }${key}";

          sevs = {
            d = {
              key = "nil";
              desc = "Diagnostic";
            };
            e = {
              key = "vim.diagnostic.severity.ERROR";
              desc = "Error";
            };
            w = {
              key = "vim.diagnostic.severity.WARN";
              desc = "Warning";
            };
          };

          cmd = toLower dir;
          sev = sevs."${key}".key;
        in
          keys.mk ["n"] kmap
          (
            mkRaw
            # lua
            "function() vim.diagnostic.goto_${cmd}({ severity = ${sev} }) end"
          )
          "${dir} ${sevs."${key}".desc}"
      )
      {
        dir = ["Next" "Prev"];
        key = ["d" "e" "w"];
      }
    )
    #
    # Quit - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
    ++ [(keys.mk ["n"] "<LEADER>qq" "<CMD>qa<CR>" "Quit All")]
    #
    # Inspect - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
    ++ [(keys.mk ["n"] "<LEADER>ui" (mkRaw "vim.show_pos") "Inspect Position")]
    #
    # Window Management - - - - - - - - - - - - - - - - - - - - - - - - - - - -
    ++ [
      (keys.mkWithOpts ["n"] "<LEADER>w" "<C-w>" "Windows" {remap = true;})
      (keys.mkWithOpts ["n"] "<LEADER>-" "<C-w>s" "Split Window Below" {remap = true;})
      (keys.mkWithOpts ["n"] "<LEADER>|" "<C-w>v" "Split Window Right" {remap = true;})
      (keys.mkWithOpts ["n"] "<LEADER>wd" "<C-w>c" "Delete Window" {remap = true;})
    ]
    #
    # Tab Management - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
    ++ (
      mapAttrsToList (
        k: a: let
          desc =
            if (a == "Only")
            then "Close Other Tabs"
            else "${a} Tab";
        in
          keys.mk ["n"] "<LEADER><TAB>${k}" "<CMD>tab${toLower a}<CR>" desc
      )
      {
        l = "Last";
        o = "Only";
        f = "First";
        "<TAB>" = "New";
        "]" = "Next";
        d = "Close";
        "[" = "Previous";
      }
    );
}