dotfiles/hm/vim/default.nix

{ pkgs, lib, config, ... }:
{
  # config = lib.mkIf config.programs.nixvim.enable { # Somehow this is infinite recursion?
  config = {
    home.sessionVariables = {
      EDITOR = "nvim";
    } // lib.optionalAttrs config.frogeye.desktop.xorg {
      VISUAL = "nvim";
    };
    programs.bash.shellAliases = {
      vi = "nvim";
      vim = "nvim";
    };
    programs.nixvim = {
      # Setting a custom base16 theme via nixvim is required so feline works, and
      # because stylix makes a config that otherwise only works with dark
      # polarity.
      colorschemes.base16.colorscheme = "solarized-${config.frogeye.polarity}";
      options = {
        ignorecase = true;
        smartcase = true;
        gdefault = true;

        tabstop = 4;
        shiftwidth = 4;
        expandtab = true;

        splitbelow = true;
        visualbell = true;

        updatetime = 250;
        undofile = true;

        wildmode = "longest:full,full";
        wildmenu = true;
      };
      globals = {
        netrw_fastbrowse = 0; # Close the file explorer once you select a file
      };
      plugins = {
        # Go to whatever
        telescope = {
          enable = true;
          keymaps = {
            gF = "find_files";
            gf = "git_files";
            gB = "buffers";
            gl = "current_buffer_fuzzy_find";
            gL = "live_grep";
            gT = "tags";
            gt = "treesitter";
            gm = "marks";
            gh = "oldfiles";
            gH = "command_history";
            gS = "search_history";
            gC = "commands";
            gr = "lsp_references";
            ge = "diagnostics";
            # ga = "lsp_code_actions";
            # gE = "lsp_workspace_diagnostics";
            # TODO Above makes nvim crash on startup, action is not provided
            gd = "lsp_definitions";
            gs = "lsp_document_symbols";
          };
          defaults = {
            vimgrep_arguments = [
              "${pkgs.ripgrep}/bin/rg"
              "--color=never"
              "--no-heading"
              "--with-filename"
              "--line-number"
              "--column"
              "--smart-case"
            ];
          };
          extensions.fzf-native = {
            enable = true;
            caseMode = "smart_case";
            fuzzy = true;
            overrideFileSorter = true;
            overrideGenericSorter = true;
          };
        };

        # Surrounding pairs
        surround.enable = true; # Change surrounding pairs (e.g. brackets, quotes)

        undotree.enable = true; # Navigate edition history

        # Git
        fugitive.enable = true; # Git basics
        gitsigns.enable = true; # Show changed lines in the gutter

      };
      extraPlugins = with pkgs.vimPlugins; [
        # Search/replace
        vim-abolish # Regex for words, with case in mind
        vim-easy-align # Aligning lines around a certain character

        # Surrounding pairs
        targets-vim # Better interaction with surrounding pairs

        # Registers
        registers-nvim # Show register content when pressing "
        # TODO Doesn't work. Didn't work on Arch either

        # Tags
        vim-gutentags # Generate tags
        symbols-outline-nvim # Show a symbol panel on the right
        # TODO Fails on startup. Same on Arch. Config issue?

        # Git
        fugitive-gitlab-vim # Open files in GitLab
        # TODO Connect it!

        # Language-specific
        tcomment_vim # Language-aware (un)commenting
      ] ++ lib.optionals config.frogeye.extra [
        vim-LanguageTool # Check grammar for human languages
      ] ++ lib.optionals config.programs.pandoc.enable [
        vim-pandoc # Pandoc-specific stuff because there's no LSP for it
        vim-pandoc-syntax
      ] ++ lib.optionals config.frogeye.dev.ansible [
        ansible-vim # TODO Doesn't have snippets
      ];
      extraConfigLua = builtins.readFile ./symbols-outline-nvim.lua;
      extraConfigVim = ''
        " GENERAL

        " Avoid showing message extra message when using completion
        set shortmess+=c

        command Reload source $MYVIMRC

        " PLUGINS

        " vim-gutentags
        let g:gutentags_cache_dir = expand('~/.cache/nvim/tags')
      '' + lib.optionalString config.frogeye.extra ''
        " languagetool
        let g:languagetool_cmd = "${pkgs.languagetool}/bin/languagetool-commandline"
        " TODO Doesn't work

      '' + lib.optionalString config.programs.pandoc.enable ''
        " vim-pandox
        let g:pandoc#modules#disabled = ["folding"]
        let g:pandoc#spell#enabled = 0
        let g:pandoc#syntax#conceal#use = 0

      '';
      autoCmd = [
        # vim-easy-align: Align Markdown tables
        { event = "FileType"; pattern = "markdown"; command = "vmap <Bar> :EasyAlign*<Bar><Enter>"; }
      ];

      userCommands = {
        # Reload = { command = "source $MYVIRMC"; };
        # TODO Is not working, options is set to nil even though it shouldn't
      };

      keymaps = [
        # GENERAL

        # Allow saving of files as sudo when I forgot to start vim using sudo.
        # From https://stackoverflow.com/a/7078429
        { mode = "c"; key = "w!!"; action = "w !sudo tee > /dev/null %"; }

        { mode = "i"; key = "jk"; action = "<Esc>"; }
        { mode = "v"; key = "<Enter>"; action = "<Esc>"; }
        { key = "<Enter>"; action = "o<Esc>"; }

        # { key = "<C-H>"; action = ":bp<CR>"; }
        # { key = "<C-L>"; action = ":bn<CR>"; }
        { key = "<C-K>"; action = "kkkkkkkkkkkkkkkkkkkkk"; }
        { key = "<C-J>"; action = "jjjjjjjjjjjjjjjjjjjjj"; }

        # \s to replace globally the word under the cursor
        { key = "<Leader>s"; action = ":%s/\\<<C-r><C-w>\\>/"; }

        # PLUGINS

        # symbols-outline-nvim
        { key = "<Space>s"; action = "<Cmd>SymbolsOutline<CR>"; options = { silent = true; }; }

        # undotree
        { key = "<Space>u"; action = "<Cmd>UndotreeToggle<CR>"; options = { silent = true; }; }

      ];
    };
  };

  imports = [
    ./code.nix
    ./completion.nix
    ./decoration.nix
    ./lsp.nix
  ];
}