local previewers = require("telescope.previewers")
local Job = require("plenary.job")
local new_maker = function(filepath, bufnr, opts)
  filepath = vim.fn.expand(filepath)
  Job:new({
    command = "file",
    args = { "--mime-type", "-b", filepath },
    on_exit = function(j)
      local mime_type = vim.split(j:result()[1], "/")[1]
      if mime_type == "text" then
        previewers.buffer_previewer_maker(filepath, bufnr, opts)
      else
        -- maybe we want to write something to the buffer here
        vim.schedule(function()
          vim.api.nvim_buf_set_lines(bufnr, 0, -1, false, { "BINARY" })
        end)
      end
    end
  }):sync()
end

require("telescope").setup {
  defaults = {
    preview = {
      mime_hook = function(filepath, bufnr, opts)
        local is_image = function(filepath)
          local image_extensions = {'png','jpg'}   -- Supported image formats
          local split_path = vim.split(filepath:lower(), '.', {plain=true})
          local extension = split_path[#split_path]
          return vim.tbl_contains(image_extensions, extension)
        end
        if is_image(filepath) then
          local term = vim.api.nvim_open_term(bufnr, {})
          local function send_output(_, data, _ )
            for _, d in ipairs(data) do
              vim.api.nvim_chan_send(term, d..'\r\n')
            end
          end
          vim.fn.jobstart(
            {
              'catimg', filepath  -- Terminal image viewer command
            },
            {on_stdout=send_output, stdout_buffered=true})
        else
          require("telescope.previewers.utils").set_preview_message(bufnr, opts.winid, "Binary cannot be previewed")
        end
      end
    },
    buffer_previewer_maker = new_maker,
  }
}