-- English comments only.

local ok_cmp, cmp = pcall(require, "cmp")
if not ok_cmp then
  return
end

local ok_snip, luasnip = pcall(require, "luasnip")
if not ok_snip then
  return
end

cmp.setup({
  snippet = {
    expand = function(args)
      luasnip.lsp_expand(args.body)
    end,
  },
  window = {
    completion = cmp.config.window.bordered(),
    documentation = cmp.config.window.bordered(),
  },
  mapping = cmp.mapping.preset.insert({
    ["<C-Space>"] = cmp.mapping.complete(),
    ["<CR>"] = cmp.mapping.confirm({ select = true }),

    ["<Tab>"] = cmp.mapping(function(fallback)
      if cmp.visible() then
        cmp.select_next_item()
      elseif luasnip.expand_or_jumpable() then
        luasnip.expand_or_jump()
      else
        fallback()
      end
    end, { "i", "s" }),

    ["<S-Tab>"] = cmp.mapping(function(fallback)
      if cmp.visible() then
        cmp.select_prev_item()
      elseif luasnip.jumpable(-1) then
        luasnip.jump(-1)
      else
        fallback()
      end
    end, { "i", "s" }),
  }),
  sources = cmp.config.sources({
    { name = "nvim_lsp" },
  }),
})