with import <nixpkgs> {};

let
  neovim = pkgs.neovim.override {
    configure = {
      customRC = ''
        set autoread
        "" Theming

        set background=light

        "" General settings

        " Undo over sessions
        set undofile
        set undodir=~/.cache/nvimundo

        " Automatically save sessions on exit and load them on start
        function! MakeSession()
        let b:sessiondir = $HOME . "/.config/nvim/sessions" . getcwd()
        if (filewritable(b:sessiondir) != 2)
        exe 'silent !mkdir -p ' b:sessiondir
        redraw!
        endif
        let b:filename = b:sessiondir . '/session.vim'
        exe "mksession! " . b:filename
        endfunction

        function! LoadSession()
        let b:sessiondir = $HOME . "/.config/nvim/sessions" . getcwd()
        let b:sessionfile = b:sessiondir . "/session.vim"
        if (filereadable(b:sessionfile))
        exe 'source ' b:sessionfile
        else
        echo "No session loaded."
        endif
        endfunction
        if(argc() == 0)
        au VimEnter * nested :call LoadSession()
        endif
        au VimLeave * :call MakeSession()

        "" Filetype configuration

        " Base settings for all files

        syntax enable
        set number
        set showcmd
        set scrolloff=8
        set expandtab
        set tabstop=4
        set shiftwidth=4
        set linebreak

        set list
        set listchars=tab:·\ ,trail:·
        set inccommand=split
        set clipboard=unnamedplus

        filetype plugin indent on

        " Filetype specific settings

        autocmd FileType javascript call TwoSpaces()
        autocmd FileType less call TwoSpaces()
        autocmd FileType css call TwoSpaces()
        autocmd FileType scss call TwoSpaces()
        autocmd FileType html call TwoSpaces()
        autocmd FileType ruby call TwoSpaces()
        autocmd FileType yaml call TwoSpaces()
        autocmd FileType eruby call TwoSpaces()
        autocmd FileType haskell call TwoSpaces()
        autocmd FileType json call TwoSpaces()
        autocmd FileType typescript call TwoSpaces()

        function TwoSpaces()
        setlocal tabstop=2
        setlocal shiftwidth=2
        setlocal softtabstop=2
        endfunction

        "" Plugin configuration

        function! s:completedFiles(winid, filename, ...) abort
        bdelete!
        call win_gotoid(a:winid)
        if filereadable(a:filename)
        let lines = readfile(a:filename)
        if !empty(lines)
            exe ':e ' . lines[0]
        endif
        call delete(a:filename)
        endif
        endfunction

        function! FzyFiles()
        let file = tempname()
        let winid = win_getid()
        let cmd = split(&shell) + split(&shellcmdflag) + ["${pkgs.ripgrep.out}/bin/rg --files --hidden -g '!/.git' --smart-case | ${pkgs.fzy.out}/bin/fzy > " . file]
        let F = function('s:completedFiles', [winid, file])
        botright 10 new
        call termopen(cmd, {'on_exit': F})
        startinsert
        endfunction

        function! s:completedGrep(winid, filename, ...) abort
        bdelete!
        call win_gotoid(a:winid)
        if filereadable(a:filename)
        let lines = readfile(a:filename)
        if !empty(lines)
            let list = split(lines[0], ':')
            let file = list[0]
            let line = list[1]
            exe ':e ' . file
            exe line
        endif
        call delete(a:filename)
        endif
        endfunction

        function! FzyGrep()
        let file = tempname()
        let winid = win_getid()
        let cmd = split(&shell) + split(&shellcmdflag) + ["${pkgs.ripgrep.out}/bin/rg --vimgrep --hidden -g '!/.git' '^' | ${pkgs.fzy.out}/bin/fzy > " . file]
        let F = function('s:completedGrep', [winid, file])
        botright 10 new
        call termopen(cmd, {'on_exit': F})
        startinsert
        endfunction

        nnoremap <C-f> :call FzyFiles()<CR>
        nnoremap <C-g> :call FzyGrep()<CR>
      '';

      vam.knownPlugins = pkgs.vimPlugins;
      vam.pluginDictionaries = [
        {
          names = [
            "vim-ledger"
            "vim-nix"
          ];
        }
      ];
    };
  };
in
  {
    home-manager.users.charlotte = { pkgs, ... }: {
      nixpkgs = {
        config = {
          packageOverrides = pkgs: {
            neovim = neovim;
          };
        };
      };
      home.packages = [ pkgs.neovim ];
    };
  }