dotfiles/hm/vim/decoration.nix

{ pkgs, lib, config, ... }:
{
  config = {
    programs.nixvim = {
      autoCmd = [
        # Turn off relativenumber only for insert mode
        { event = "InsertEnter"; pattern = "*"; command = "set norelativenumber"; }
        { event = "InsertLeave"; pattern = "*"; command = "set relativenumber"; }
      ];
      extraPlugins = with pkgs.vimPlugins; [
        nvim-scrollview # Scroll bar
      ];
      keymaps = [
        # barbar
        { key = "<C-H>"; action = "<Cmd>BufferPrevious<CR>"; options = { silent = true; }; }
        { key = "<C-L>"; action = "<Cmd>BufferNext<CR>"; options = { silent = true; }; }
        # TODO https://www.reddit.com/r/neovim/comments/mbj8m5/how_to_setup_ctrlshiftkey_mappings_in_neovim_and/
        { key = "<Space><C-H>"; action = "<Cmd>BufferMovePrevious<CR>"; options = { silent = true; }; }
        { key = "<Space><C-L>"; action = "<Cmd>BufferMoveNext<CR>"; options = { silent = true; }; }
        # TODO gotos don't work
        { key = "<C-1>"; action = "<Cmd>BufferGoto 1<CR>"; options = { silent = true; }; }
        { key = "<C-2>"; action = "<Cmd>BufferGoto 2<CR>"; options = { silent = true; }; }
        { key = "<C-3>"; action = "<Cmd>BufferGoto 3<CR>"; options = { silent = true; }; }
        { key = "<C-4>"; action = "<Cmd>BufferGoto 4<CR>"; options = { silent = true; }; }
        { key = "<C-5>"; action = "<Cmd>BufferGoto 5<CR>"; options = { silent = true; }; }
        { key = "<C-6>"; action = "<Cmd>BufferGoto 6<CR>"; options = { silent = true; }; }
        { key = "<C-7>"; action = "<Cmd>BufferGoto 7<CR>"; options = { silent = true; }; }
        { key = "<C-8>"; action = "<Cmd>BufferGoto 8<CR>"; options = { silent = true; }; }
        { key = "<C-9>"; action = "<Cmd>BufferGoto 9<CR>"; options = { silent = true; }; }
        { key = "<C-0>"; action = "<Cmd>BufferLast<CR>"; options = { silent = true; }; }
        { key = "gb"; action = "<Cmd>BufferPick<CR>"; options = { silent = true; }; }
        # TODO Other useful options?
      ];
      options = {
        showmode = false;
        number = true;
        relativenumber = true;
        title = true;
      };
      plugins = {
        # Tabline
        barbar.enable = true;
        # TODO Investigate bufferline?
        # Status line
        lualine = with config.lib.stylix.colors.withHashtag; let
          normal = { fg = base05; bg = base01; };
          inverted = { fg = base00; bg = base03; };
          normal_ina = { fg = base02; bg = base01; };
          inverted_ina = { fg = base00; bg = base02; };
        in
        rec {
          enable = true;
          inactiveSections = sections;
          sections = {
            lualine_a = [{
              name = ''string.format('%d', vim.fn.line('$'))'';
            }];
            lualine_b = [
              "mode"
            ];
            lualine_c = [{
              name = "filename";
              color = {
                __raw = ''
                  function(section)
                    return { fg = vim.bo.modified and '${base08}' or '${normal.fg}' }
                  end
                '';
              };
              extraConfig = {
                path = 1; # Relative path
                symbols = {
                  modified = "●";
                  newfile = "󰻭";
                  readonly = "󰏯";
                  unnamed = "󱀶";
                };
              };
            }
              "location"];
            lualine_x = [{
              name = ''(next(vim.lsp.buf_get_clients()) == nil) and "󰒲 " or ""'';
              extraConfig.separator = { left = ""; right = ""; };
            }] ++ (lib.mapAttrsToList
              (diag_name: diag_color: {
                name = "diagnostics";
                extraConfig = {
                  color.bg = diag_color;
                  colored = false;
                  separator = { left = ""; right = ""; };
                  sections = [ diag_name ];
                };
              })
              {
                error = base08;
                warn = base0A;
                hint = base0C;
                info = base0B;
              });
            lualine_y = [{
              name = "diff";
              extraConfig = {
                diff_color = {
                  added.fg = base0B;
                  modified.fg = base0A;
                  removed.fg = base08;
                };
                symbols = {
                  added = " ";
                  modified = " ";
                  removed = " ";
                };
              };
            }
              "branch"];
            lualine_z = [
              "filetype"
              "fileformat"
              "encoding"
            ];
          };
          theme = (lib.mapAttrs
            (mode_name: mode_color: {
              a = inverted;
              b = inverted // { bg = mode_color; gui = "bold"; };
              c = normal;
              x = inverted;
              y = normal;
              z = inverted // { bg = mode_color; };
            })
            {
              normal = base0D;
              insert = base0B;
              visual = base0F;
              replace = base08;
              command = base0E;
            }) // {
            inactive = {
              a = inverted_ina;
              b = normal_ina // { bg = base00; gui = "bold"; };
              c = normal_ina;
              x = inverted_ina;
              y = normal_ina;
              z = normal_ina // { bg = base00; };
            };
          };
        };
        # Show context on top if scrolled out
        treesitter-context = {
          enable = true;
          maxLines = 5;
        };
      };
    };
  };
}