{ pkgs, lib, ... }:
let
  abbrevJSON = lib.importJSON ../abbrev.json;
  toEnvAbbrev = aj:
    lib.concatLines (map (e:
      "iabbrev <buffer> ${e.alias} \\begin{${e.target}}<CR><CR>\\end{${e.target}}<Esc>ki"
    ) aj.env);
  toMathAbbrev = aj:
    lib.concatLines (map (e:
      "iabbrev <buffer> m${e.alias} ${e.target}"
    ) aj.math);
  toGenericAbbrev = aj:
    lib.concatLines (map (e:
      "iabbrev <buffer> ${e.alias} ${e.target}"
    ) aj.generic);
in
pkgs.vim-full.customize {
  name = "vim";
  vimrcConfig = {
    packages.myPackages = with pkgs.vimPlugins; {
      start = [
        vim-eskk
        vimtex
      ];
      opt = [];
    };
    customRC = ''
      filetype plugin indent on
      set encoding=utf-8
      set autoindent
      set smartindent
      set expandtab
      set shiftwidth=4
      set tabstop=4
      set wrap
      set number relativenumber
      set nospell
      set ruler
      set cursorline
      set mousehide
      syntax enable

      let g:vimtex_view_method = 'general'
      let g:vimtex_view_general_viewer = 'okular'
      let g:vimtex_view_general_options = '--unique file:@pdf\#src:@line@tex'
      let g:vimtex_compiler_method = 'latexmk'
      let maplocalleader = ","

      let g:eskk#directory = "~/.config/eskk"
      let g:eskk#dictionary = { 'path': "~/.config/eskk/jisyo", 'sorted': 1, 'encoding': 'utf-8', }
      let g:eskk#large_dictionary = { 'path': "${pkgs.skkDictionaries.l}/share/skk/SKK-JISYO.L", 'sorted': 1, 'encoding': 'euc-jp', }
      let g:eskk#kakutei_when_unique_candidate = 0
      let g:eskk#enable_completion = 0
      let g:eskk#no_default_mappings = 1
      let g:eskk#keep_state = 0
      let g:eskk#egg_like_newline = 1
      let g:toggle_latex_eskk = 1

      function! s:latex_eskk() abort
          if &filetype == 'tex' && g:toggle_latex_eskk ==# 1
              call eskk#enable()
          endif
      endfunction

      function! s:latex_eskk_toggle() abort
          let g:toggle_latex_eskk = g:toggle_latex_eskk == 1 ? 0 : 1
          if g:toggle_latex_eskk ==# 1
              echomsg 'LaTeX Japanese Input Enabled'
          else
              echomsg 'LaTeX Japanese Input Disabled'
          endif
      endfunction

      augroup vimrc_eskk
          autocmd!
          autocmd Filetype tex nnoremap <buffer><silent> <F1> :call <SID>latex_eskk_toggle()<CR>
          autocmd User eskk-enable-post lmap <buffer> l <Plug>(eskk:disable)
      augroup END

      imap jk <Plug>(eskk:toggle)
      cmap jk <Plug>(eskk:toggle)

      imap jj <C-]>

      augroup latex_abbr
      ${toEnvAbbrev abbrevJSON}

      ${toGenericAbbrev abbrevJSON}

      ${toMathAbbrev abbrevJSON}
      augroup END
    '';
  };
}