{ config, pkgs, ... }:
{
  #################### Git configuration ####################
  programs.git = {
    enable = true;
    lfs.enable = true;
    config = {
      user = {
        email = "vili.m.sinerva@gmail.com";
        name = "Vili Sinervä";
        signingkey = "DF8FEAF54EFAC996!";
      };
      merge = {
        ff = "true";
      };
      pull = {
        ff = "only";
      };
      commit.gpgsign = "true";
    };
  };

  #################### Packages ####################
  environment.systemPackages = with pkgs; [
    nodejs-slim
    nixfmt-rfc-style
    nixd
  ];

  #################### Neovim configuration ####################
  programs.neovim = {
    enable = true;
    defaultEditor = true;
    vimAlias = true;
    configure = {
      packages.myVimPackage = with pkgs.vimPlugins; {
        start = [
          nerdtree
          nerdtree-git-plugin
          vim-gitgutter
          vim-fugitive
          vim-tmux-navigator
          vim-sleuth
          coc-nvim
          coc-pairs
          coc-clangd
          coc-cmake
          coc-docker
          coc-json
          coc-markdownlint
          coc-pyright
          coc-rust-analyzer
          coc-sh
          coc-toml
          coc-tsserver
          coc-yaml
        ];
      };
      customRC =
        let
          coc-config = "${pkgs.writeTextDir "coc-settings.json" ''
            {
              "workspace.ignoredFolders": [
                "$HOME",
                "$HOME/.cargo/**",
                "$HOME/.rustup/**"
              ],
              rust-analyzer.inlayHints.bindingModeHints.enable: true,
              rust-analyzer.inlayHints.closureReturnTypeHints.enable: "always",
              rust-analyzer.inlayHints.discriminantHints.enable: "always",
              rust-analyzer.inlayHints.expressionAdjustmentHints.enable: "always",
              rust-analyzer.inlayHints.expressionAdjustmentHints.hideOutsideUnsafe: true,
              rust-analyzer.inlayHints.lifetimeElisionHints.enable: "always",
              rust-analyzer.inlayHints.lifetimeElisionHints.useParameterNames: true,
              
              "languageserver": {
                "nix": {
                  "command": "nixd",
                  "filetypes": ["nix"]
                }
              }
            }
          ''}";
        in
        ''
          syntax on
          set foldmethod=syntax

          set number
          set colorcolumn=100
          set signcolumn=yes
          let NERDTreeShowLineNumbers=1

          set background=dark

          set showcmd
          set scrolloff=16

          filetype plugin indent on
          set autoindent
          set shiftwidth=3
          set tabstop=3

          " Some servers have issues with backup files, see #649
          set nobackup
          set nowritebackup
          " Having longer updatetime (default is 4000 ms = 4s) leads to noticeable
          " delays and poor user experience
          set updatetime=300

          " Make <CR> to accept selected completion item or notify coc.nvim to format
          " <C-g>u breaks current undo, please make your own choice.
          inoremap <silent><expr> <CR> coc#pum#visible() ? coc#pum#confirm()
          \: "\<C-g>u\<CR>\<c-r>=coc#on_enter()\<CR>"
          " Navigate suggestion list with tab and shift-tab
          inoremap <expr> <Tab> coc#pum#visible() ? coc#pum#next(1) : "\<Tab>"
          inoremap <expr> <S-Tab> coc#pum#visible() ? coc#pum#prev(1) : "\<S-Tab>"

          " If another buffer tries to replace NERDTree, put it in the other window, and bring back NERDTree.
          autocmd BufEnter * if winnr() == winnr('h') && bufname('#') =~ 'NERD_tree_\d\+' && bufname('%') !~ 'NERD_tree_\d\+' && winnr('$') > 1 |
          \ let buf=bufnr() | buffer# | execute "normal! \<C-W>w" | execute 'buffer'.buf | endif

          " Start NERDTree. If a file is specified, move the cursor to its window.
          autocmd StdinReadPre * let s:std_in=1
          autocmd VimEnter * NERDTree | if argc() > 0 || exists('s:std_in') | wincmd p | endif

          let g:coc_config_home = "${coc-config}"

          let g:tmux_navigator_no_mappings = 1
          noremap <silent> <C-h> :<C-U>TmuxNavigateLeft<cr>
          noremap <silent> <C-j> :<C-U>TmuxNavigateDown<cr>
          noremap <silent> <C-k> :<C-U>TmuxNavigateUp<cr>
          noremap <silent> <C-l> :<C-U>TmuxNavigateRight<cr>

          augroup nixcmd
             autocmd!
             autocmd BufWritePre *.nix mkview
             autocmd BufWritePre *.nix %!nixfmt
             autocmd BufWritePost *.nix loadview
          augroup END
        '';
    };
  };
}