local config = require('cosmic.core.user')
local augroup_name = 'CosmicNvimLspFormat'
local group = vim.api.nvim_create_augroup(augroup_name, { clear = true })
local M = {}

local auto_format_lock = false

function M.on_attach(client, bufnr)
  local function buf_set_option(...)
    vim.api.nvim_buf_set_option(bufnr, ...)
  end

  -- Enable completion triggered by <c-x><c-o>
  buf_set_option('omnifunc', 'v:lua.vim.lsp.omnifunc')

  if config.lsp.format_on_save then
    local format_filetypes = ''
    if vim.tbl_islist(config.lsp.format_on_save) then
      for _, ft in pairs(config.lsp.format_on_save) do
        format_filetypes = format_filetypes .. '*' .. ft
      end
    else
      format_filetypes = '*'
    end

    vim.api.nvim_create_autocmd(string.format('BufWritePre %s', format_filetypes), {
      callback = function()
        vim.lsp.buf.format({
          timeout_ms = config.lsp.format_timeout,
          -- check user config to see if we can format on save
          filter = function(clients)
            return vim.tbl_filter(function(ct)
              if config.lsp.can_client_format(ct.name) then
                return ct.name
              end
            end, clients)
          end,
        })
      end,
      group = group,
      nested = true,
    })
  end

  require('cosmic.lsp.mappings').init(client, bufnr)
end

M.flags = {
  debounce_text_changes = 150,
}

M.capabilities = {}

M.root_dir = function(fname)
  local util = require('lspconfig').util
  return util.root_pattern('.git')(fname)
    or util.root_pattern('tsconfig.base.json')(fname)
    or util.root_pattern('package.json')(fname)
    or util.root_pattern('.eslintrc.js')(fname)
    or util.root_pattern('.eslintrc.json')(fname)
    or util.root_pattern('tsconfig.json')(fname)
end

M.autostart = true

M.single_file_support = true

return M