{lib, ...}: {
  programs.nixvim = {
    globals = {
      mapleader = " ";
      maplocalleader = " ";
    };
    maps = let
      normal_and_insert = {
        "<Esc>" = {
          action = "<cmd>noh<CR><Esc>";
          desc = "Disable the search highlighting and send Escape";
        };
      };
    in {
      insert =
        lib.recursiveUpdate {
          "hh" = {
            action = ''
              function()
                local cmp = require('cmp');
                local luasnip = require('luasnip');

                if cmp.visible() then
                    cmp.select_next_item()
                elseif luasnip.expand_or_locally_jumpable() then
                    luasnip.expand_or_jump()
                end
              end
            '';
            lua = true;
            desc = "completion trigger/ forward in completen menu";
          };
          "<S-Tab>" = {
            action = ''
              function()
                local cmp = require('cmp');
                cmp.confirm()
              end
            '';
            lua = true;
            desc = "confirm the selected item";
          };
        }
        normal_and_insert;
      normalVisualOp = {
        # yank/ cut to the system clipboard
        "<leader>y" = "\"+y";
        "<leader>Y" = "\"+Y";

        # Unmap some old keys
        #"s" = "'<Nop>'";
        #"t" = "'<Nop>'";
        "<Up>" = "<Nop>";
        "<Down>" = "<Nop>";
        "<Left>" = "<Nop>";
        "<Right>" = "<Nop>";

        # Center the cursor vertically when moving to the next word during a search.
        "l" = "nzzzv";
        "L" = "Nzzzv";
        # remap the other keys to dvorak
        "k" = "t";
        "K" = "T";
        "j" = "k";
        "J" = "K";

        # Change Vim-keys
        "h" = "<left>";
        "t" = "g<down>";
        "n" = "g<up>";
        "s" = "<right>";

        # Move display lines
        "0" = "g0";
        "$" = "g$";
      };
      normal =
        lib.recursiveUpdate {
          "<Tab>" = {
            action = ":";
            desc = "jump to command line";
          };

          "\\f" = {
            action = "function() require('lf').start() end";
            lua = true;
            desc = "open lf in a floating window";
          };

          # Splits
          "<C-t>" = {
            action = "<C-w>p";
            desc = "go to previous split";
          };
          "<C-n>" = {
            action = "<C-w>w";
            desc = "go to next split";
          };
          "<leader>-" = {
            action = "<C-W>s";
            desc = "New horizontal split";
          };
          "<leader>|" = {
            action = "<C-W>v";
            desc = "New vertical split";
          };

          # Exit insert mode after creating a new line above or below the current line.";
          "o" = "o<Esc>";
          "O" = "O<Esc>";

          "<leader>p" = {
            action = "\"_dP";
            desc = "keep the cut thing in the base register";
          };

          "<leader>d" = {
            action = "\"_d";
            desc = "delete without saving to register";
          };
          "dd" = {
            action = ''
              function()
                if vim.api.nvim_get_current_line():match("^%s*$") then
                  return '"_dd'
                else
                  return "dd"
                end
              end
            '';
            lua = true;
            desc = "Pipe all blank line deletions to the blackhole register";
            expr = true;
            silent = true;
          };

          "<leader>s" = {
            action = ":%s/\\<<C-r><C-w>\\>/<C-r><C-w>/gI<Left><Left><Left>";
            desc = "replace for the word under the cursor";
          };

          "<C-s>" = {
            action = "<cmd>mksession! <CR>";
            desc = "to overwrite/create a session";
          };

          "<leader>X" = {
            action = "[[!!$SHELL <cr>]]";
            desc = "Read the current line and execute that line in your $SHELL. The resulting output will replace the curent line that was being executed.";
          };
        }
        normal_and_insert;
      terminal = {
        "<Esc><Esc>" = {
          action = "<C-\\><C-n>";
          desc = "Exit terminal mode with <Esc><Esc>";
        };
      };
      visual = {
        # move selected lines in visual mode
        "T" = ":m '>+1<CR>gv=gv";
        "N" = ":m '<-2<CR>gv=gv";
      };
    };
  };
}