local lsp = vim.lsp
local util = lsp.util
local nutils = require('navigator.util')
local api = vim.api
local log = nutils.log
local M = {}

function M.handler(_, result, ctx, config)
  config = config or {}
  config.focus_id = ctx.method
  if api.nvim_get_current_buf() ~= ctx.bufnr then
    -- Ignore result since buffer changed. This happens for slow language servers.
    return
  end
  if not (result and result.contents) then
    if config.silent ~= true then
      vim.notify('No information available')
    end
    vim.schedule(function()
      -- fallback to signature help
      vim.lsp.buf.signature_help()
    end)
    return
  end
  local format = 'markdown'
  local contents ---@type string[]
  if type(result.contents) == 'table' and result.contents.kind == 'plaintext' then
    format = 'plaintext'
    contents = vim.split(result.contents.value or '', '\n', { trimempty = true })
  else
    contents = util.convert_input_to_markdown_lines(result.contents)
  end
  if vim.tbl_isempty(contents) then
    if config.silent ~= true then
      vim.notify('No information available')
    end
    return
  end
  return util.open_floating_preview(contents, format, config)
end

return M