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

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

require("luasnip/loaders/from_vscode").lazy_load()

local check_backspace = function()
  local col = vim.fn.col "." - 1
  return col == 0 or vim.fn.getline("."):sub(col, col):match "%s"
end

local kind_icons = {
  Text = "",
  Method = "m",
  Function = "",
  Constructor = "",
  Field = "",
  Variable = "",
  Class = "",
  Interface = "",
  Module = "",
  Property = "",
  Unit = "",
  Value = "",
  Enum = "",
  Keyword = "",
  Snippet = "",
  Color = "",
  File = "",
  Reference = "",
  Folder = "",
  EnumMember = "",
  Constant = "",
  Struct = "",
  Event = "",
  Operator = "",
  TypeParameter = "",
}

cmp.setup({
  snippet = {
	expand = function(args)
	  luasnip.lsp_expand(args.body)
	end,
  },
  mapping = {
	['<C-b>'] = cmp.mapping(cmp.mapping.scroll_docs(-4), { 'i', 'c' }),
	['<C-f>'] = cmp.mapping(cmp.mapping.scroll_docs(4), { 'i', 'c' }),
	['<C-Space>'] = cmp.mapping(cmp.mapping.complete(), { 'i', 'c' }),
	['<C-y>'] = cmp.config.disable, -- Specify `cmp.config.disable` if you want to remove the default `<C-y>` mapping.
	['<C-e>'] = cmp.mapping({
	  i = cmp.mapping.abort(),
	  c = cmp.mapping.close(),
	}),
	['<CR>'] = cmp.mapping.confirm({ select = false }), -- Accept currently selected item. Set `select` to `false` to only confirm explicitly selected items.
	["<Tab>"] = cmp.mapping(function(fallback)
      if cmp.visible() then
        cmp.select_next_item()
      elseif luasnip.expandable() then
        luasnip.expand()
      elseif luasnip.expand_or_jumpable() then
        luasnip.expand_or_jump()
      elseif check_backspace() then
        fallback()
      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" },
	{ name = "nvim_lua" },
	{ name = "luasnip" },
	{ name = "buffer" },
	{ name = "path" },
  }),
  formatting = {
	fields = { "kind", "abbr", "menu" },
	format = function(entry, vim_item)
	  vim_item.kind = string.format("%s", kind_icons[vim_item.kind])
	  vim_item.menu = ({
		nvim_lsp = "[LSP]",
		nvim_lua = "[NVIM_LUA]",
		luasnip = "[Snippet]",
		buffer = "[Buffer]",
		path = "[Path]",
	  })[entry.source.name]
	  return vim_item
	end,
  },
  confirm_opts = {
	behavior = cmp.ConfirmBehavior.Replace,
	select = false,
  },
  window = {
	documentation = {
	  border = { "╭", "─", "╮", "│", "╯", "─", "╰", "│" },
	},
  },
  experimental = {
	-- ghost_text = true, 
  },
})