{ config, options, lib, pkgs, ... }:

with lib;
with lib.my;
let cfg = config.modules.editors.vim;
in {
  options.modules.editors.vim = {
    enable = mkBoolOpt false;
  };

  config = mkIf cfg.enable {
    user.packages = with pkgs; [
      editorconfig-core-c
      unstable.neovim
    ];

    # options.users
    home-manager.users.anish.programs.neovim = {
      enable = true;

    # = TODO something like this n00b.
    # builtins.concatStringsSep "\n" [
    #   (lib.strings.fileContents ./base.vim)
    #   (lib.strings.fileContents ./plugins.vim)
    #   (lib.strings.fileContents ./lsp.vim)

    #   # this allows you to add lua config files
    #   ''
    #     lua << EOF
    #     ${lib.strings.fileContents ./config.lua}
    #     ${lib.strings.fileContents ./lsp.lua}
    #     EOF
    #   ''
    # ];

    #home-manager.programs.nvim = {
    #  extraConfig = ''
    #    set tabstop=2
    #    set showmatch
    #    set shiftwidth=2
    #    set noexpandtab
    #    set autoindent
    #    
    #    set foldmethod=indent   " fold based on indent
    #    set number
    #    set nocompatible
    #    set relativenumber
    #    set showtabline=2
    #    set autowriteall
    #    		syntax on
    #    set list lcs=tab:\|\ 
    #    filetype plugin on
    #    
    #    set termguicolors
    #    let ayucolor="dark"
    #    colorscheme ayu
    #    
    #    " window
    #    nmap <leader>wh  :topleft  vnew<CR>
    #    nmap <leader>wl :botright vnew<CR>
    #    nmap <leader>wk    :topleft  new<CR>
    #    nmap <leader>wj  :botright new<CR>
    #    
    #    let mapleader = "\<Space>"
    #    
    #    " lightline colorscheme
    #    let g:lightline = {
    #    			\ 'colorscheme': 'seoul256',
    #    			\ }
    #    
    #    " moving splits with vim movements.
    #    :tnoremap <A-h> <C-\><C-N><C-w>h
    #    :tnoremap <A-j> <C-\><C-N><C-w>j
    #    :tnoremap <A-k> <C-\><C-N><C-w>k
    #    :tnoremap <A-l> <C-\><C-N><C-w>l
    #    :inoremap <A-h> <C-\><C-N><C-w>h
    #    :inoremap <A-j> <C-\><C-N><C-w>j
    #    :inoremap <A-k> <C-\><C-N><C-w>k
    #    :inoremap <A-l> <C-\><C-N><C-w>l
    #    :nnoremap <A-h> <leader>h
    #    :nnoremap <A-j> <leader>j
    #    :nnoremap <A-k> <leader>k
    #    :nnoremap <A-l> <leader>l
    #    :nnoremap <F5> "=strftime("%Y-%m-%d %H:%M:")
    #    :inoremap <F5> <C-R>=strftime("%Y-%m-%d %H:%M:")
    #    
    #    " exit normal mode in terminal
    #    :tnoremap <C-n> <C-\><C-n>
    #    
    #    let g:syntastic_always_populate_loc_list = 1
    #    let g:syntastic_auto_loc_list = 1
    #    let g:syntastic_check_on_open = 1
    #    let g:syntastic_check_on_wq = 0
    #    
    #    let g:rainbow_active = 0
    #    autocmd BufReadPost,BufNewFile c,py,nix RainbowParenthesesToggleAll
    #    
    #    " keyboard commands
    #    map <leader>t :NERDTreeToggle<CR>
    #    map <leader>s :w<CR>
    #    map <leader>q :wq<CR>
    #    map <leader>r :RainbowParenthesesToggleAll<CR>
    #    map <leader>zs :ZettelSearch<CR>
    #    map <leader>zo :ZettelOpen<CR>
    #    map <leader>zn :ZettelNew<CR>
    #    
    #    
    #    " NERDTree 
    #    " open on directory
    #    autocmd StdinReadPre * let s:std_in=1
    #    
    #    " coc
    #    "
    #    " if hidden is not set, TextEdit might fail.
    #    set hidden
    #    
    #    " Some servers have issues with backup files, see #649
    #    set nobackup
    #    set nowritebackup
    #    
    #    " Better display for messages
    #    set cmdheight=2
    #    
    #    " You will have bad experience for diagnostic messages when it's default 4000.
    #    set updatetime=300
    #    
    #    " don't give |ins-completion-menu| messages.
    #    set shortmess+=c
    #    
    #    " always show signcolumns
    #    set signcolumn=yes
    #    
    #    " Use tab for trigger completion with characters ahead and navigate.
    #    " Use command ':verbose imap <tab>' to make sure tab is not mapped by other plugin.
    #    inoremap <silent><expr> <TAB>
    #    			\ pumvisible() ? "\<C-n>" :
    #    			\ <SID>check_back_space() ? "\<TAB>" :
    #    			\ coc#refresh()
    #    inoremap <expr><S-TAB> pumvisible() ? "\<C-p>" : "\<C-h>"
    #    
    #    function! s:check_back_space() abort
    #    	let col = col('.') - 1
    #    	return !col || getline('.')[col - 1]  =~# '\s'
    #    endfunction
    #    
    #    " Use <c-space> to trigger completion.
    #    inoremap <silent><expr> <c-space> coc#refresh()
    #    
    #    " Use <cr> to confirm completion, `<C-g>u` means break undo chain at current position.
    #    " Coc only does snippet and additional edit on confirm.
    #    inoremap <expr> <cr> pumvisible() ? "\<C-y>" : "\<C-g>u\<CR>"
    #    " Or use `complete_info` if your vim support it, like:
    #    " inoremap <expr> <cr> complete_info()["selected"] != "-1" ? "\<C-y>" : "\<C-g>u\<CR>"
    #    
    #    " Use `[g` and `]g` to navigate diagnostics
    #    nmap <silent> [g <Plug>(coc-diagnostic-prev)
    #    nmap <silent> ]g <Plug>(coc-diagnostic-next)
    #    
    #    " Remap keys for gotos
    #    nmap <silent> gd <Plug>(coc-definition)
    #    nmap <silent> gy <Plug>(coc-type-definition)
    #    nmap <silent> gi <Plug>(coc-implementation)
    #    nmap <silent> gr <Plug>(coc-references)
    #    
    #    " Use K to show documentation in preview window
    #    nnoremap <silent> K :call <SID>show_documentation()<CR>
    #    
    #    function! s:show_documentation()
    #    	if (index(['vim','help'], &filetype) >= 0)
    #    		execute 'h '.expand('<cword>')
    #    	else
    #    		call CocAction('doHover')
    #    	endif
    #    endfunction
    #    
    #    " Highlight symbol under cursor on CursorHold
    #    autocmd CursorHold * silent call CocActionAsync('highlight')
    #    
    #    " Remap for rename current word
    #    nmap <leader>rn <Plug>(coc-rename)
    #    
    #    " Remap for format selected region
    #    xmap <leader>f  <Plug>(coc-format-selected)
    #    nmap <leader>f  <Plug>(coc-format-selected)
    #    
    #    augroup mygroup
    #    	autocmd!
    #    	" Setup formatexpr specified filetype(s).
    #    	autocmd FileType typescript,json setl formatexpr=CocAction('formatSelected')
    #    	" Update signature help on jump placeholder
    #    	autocmd User CocJumpPlaceholder call CocActionAsync('showSignatureHelp')
    #    augroup end
    #    
    #    " Remap for do codeAction of selected region, ex: `<leader>aap` for current paragraph
    #    xmap <leader>a  <Plug>(coc-codeaction-selected)
    #    nmap <leader>a  <Plug>(coc-codeaction-selected)
    #    
    #    " Remap for do codeAction of current line
    #    nmap <leader>ac  <Plug>(coc-codeaction)
    #    " Fix autofix problem of current line
    #    nmap <leader>qf  <Plug>(coc-fix-current)
    #    
    #    " Create mappings for function text object, requires document symbols feature of languageserver.
    #    xmap if <Plug>(coc-funcobj-i)
    #    xmap af <Plug>(coc-funcobj-a)
    #    omap if <Plug>(coc-funcobj-i)
    #    omap af <Plug>(coc-funcobj-a)
    #    
    #    " Use <C-d> for select selections ranges, needs server support, like: coc-tsserver, coc-python
    #    nmap <silent> <C-d> <Plug>(coc-range-select)
    #    xmap <silent> <C-d> <Plug>(coc-range-select)
    #    
    #    " Use `:Format` to format current buffer
    #    command! -nargs=0 Format :call CocAction('format')
    #    
    #    " Use `:Fold` to fold current buffer
    #    command! -nargs=? Fold :call     CocAction('fold', <f-args>)
    #    
    #    " use `:OR` for organize import of current buffer
    #    command! -nargs=0 OR   :call     CocAction('runCommand', 'editor.action.organizeImport')
    #    
    #    " Add status line support, for integration with other plugin, checkout `:h coc-status`
    #    " set statusline^=%{coc#status()}%{get(b:,'coc_current_function',"")}
    #    
    #    " Using CocList
    #    " Show all diagnostics
    #    nnoremap <silent> <space>a  :<C-u>CocList diagnostics<cr>
    #    " Manage extensions
    #    nnoremap <silent> <space>e  :<C-u>CocList extensions<cr>
    #    " Show commands
    #    nnoremap <silent> <space>c  :<C-u>CocList commands<cr>
    #    " Find symbol of current document
    #    nnoremap <silent> <space>o  :<C-u>CocList outline<cr>
    #    " Search workspace symbols
    #    nnoremap <silent> <space>s  :<C-u>CocList -I symbols<cr>
    #    " Do default action for next item.
    #    nnoremap <silent> <space>j  :<C-u>CocNext<CR>
    #    " Do default action for previous item.
    #    nnoremap <silent> <space>k  :<C-u>CocPrev<CR>
    #    " Resume latest coc list
    #    nnoremap <silent> <space>p  :<C-u>CocListResume<CR>
    #    
    #    au BufNewFile,BufRead *.frag,*.vert,*.fp,*.vp,*.glsl setf glsl
    #  '';

    #  extraPackages = with pkgs.vimPlugins; [
    #    vim-nix
    #    fzf-vim
    #    vim-elixir
    #    emmet-vim
    #    nerdtree
    #    goyo-vim
    #    vim-sneak
    #    lightline-vim
    #    csv-vim
    #    vimwiki
    #    coc-nvim
    #    coc-json
    #    coc-python
    #    coc-pairs
    #    coc-emmet
    #    emmet-vim
    #    LanguageClient-neovim
    #    ayu-vim
    #    rainbow_parentheses-vim
    #    vim-surround
    #    vim-fugitive
    #    #iron-nvim
    #    #nvim-colorizer
    #    vim-devicons
    #    # testing
    #    #vim-processing
    #    #vim-tidal
    #    taskwiki
    #    #vim-zettel
    #  ];
    #};

    environment.shellAliases = {
      vim = "nvim";
      v   = "nvim";
      k   = "vim -c :VimwikiIndex";
      kz  = "vim -c :VimwikiIndex -c :ZettelNew";
    };
  };
}