local ok, fzf = pcall(require, 'fzf-lua')
 if not ok then 
     vim.notify("missing module fzf-lua", vim.log.levels.WARN)
     return
 end

 local M = {}

 local function fzf_display_bookmarks(bookmarks)

   local fzf_exec_opts = {
     previewer = "builtin",
     fzf_opts = {
       ['--preview'] = fzf.shell.action(function(items)
         local contents = {}
         vim.tbl_map(function (x)
           table.insert(contents, x)
         end, items)
         return contents
       end)
     }
   }

   fzf.fzf_exec(function(fzf_cb)
     for _, bookmark in ipairs(bookmarks) do
       -- P(bookmark.text)
       local entry_text = string.gsub(bookmark.text, "\t", "")
       entry_text = string.format("%-40s", entry_text)
       fzf_cb(entry_text)   
       fzf_cb()
     end
   end, fzf_exec_opts)
 end

 local function get_bookmarks(files, opts)
     opts = opts or {}
     local bookmarks = {}

     for _,file in ipairs(files) do
         for _,line in ipairs(vim.fn['bm#all_lines'](file)) do
             local bookmark = vim.fn['bm#get_bookmark_by_line'](file, line)

             local text = bookmark.annotation ~= "" and "Annotation: " .. bookmark.annotation or bookmark.content
             if text == "" then
                 text = "(empty line)"
             end

             local only_annotated = opts.only_annotated or false

             P(only_annotated)
             if not (only_annotated and bookmark.annotation == "") then
                 table.insert(bookmarks, {
                     filename = file,
                     lnum = tonumber(line),
                     col=1,
                     text = text,
                     sign_idx = bookmark.sign_idx,
                 })
             end
         end
     end

     return bookmarks
 end

 M.all = function(opts)
   opts = opts or {}
   local files = vim.fn['bm#all_files']()
   bookmarks = get_bookmarks(files)
   fzf_display_bookmarks(bookmarks)
 end

 -- M.all()
 -- return M