-- local ts_utils = require 'nvim-treesitter.ts_utils'
local utils = require("go.utils")

local gorename = "gorename"
local vfn = vim.fn

local lsprename = function()

  local guihua = utils.load_plugin("guihua.lua", "guihua.floating")
  local input = vim.ui.input

  if guihua then
    vim.ui.input = require('guihua.input').input
  end
  vim.lsp.buf.rename()
  return vim.defer_fn(function()
    vim.ui.input = input
  end, 1000)

end

local run = function(to_identifier, ...)
  require("go.install").install(gorename)
  local fname = vfn.expand("%:p") -- %:p:h ? %:p

  local old_identifier = vfn.expand("<cword>")

  local prompt = vfn.printf("GoRename '%s' to (may take a while) :", old_identifier)
  to_identifier = to_identifier or vfn.input(prompt, old_identifier)
  local byte_offset = vfn.wordcount().cursor_bytes

  local clients = vim.lsp.get_active_clients() or {}
  if #clients > 0 then
    -- TODO check gopls?
    return lsprename()
  end

  local offset = string.format("%s:#%i", fname, byte_offset)

  local setup = { gorename, "-offset", offset, "-to", to_identifier }

  vfn.jobstart(setup, {
    on_stdout = function(_, data, _)
      data = utils.handle_job_data(data)
      if not data then
        return
      end
      -- local result = vfn.json_decode(data)
      local result = vim.json.decode(data)
      if result.errors ~= nil or result.lines == nil or result["start"] == nil or result["start"] == 0 then
        vim.notify("failed to rename" .. vim.inspect(result), vim.log.levels.ERROR)
      end
      vim.notify("renamed to " .. to_identifier, vim.log.levels.DEBUG)
    end,
  })
end
return { run = run, lsprename = lsprename }