vim.opt.completeopt = 'menu,menuone,noselect'
-- make 'kind' readable with dichromatic colorscheme
vim.cmd('highlight! CmpItemKindDefault guibg=NONE guifg=#000000')

local cmp = require('cmp')
cmp.setup({
	snippet = {
		expand = function(args)
			require('luasnip').lsp_expand(args.body)
		end,
	},
	formatting = {
		format = function(entry, vim_item)
			vim_item.menu = ({
				buffer = '[Buffer]',
				luasnip = '[Snippet]',
			})[entry.source.name]
			return vim_item
		end,
	},
	mapping = cmp.mapping.preset.insert({
		['<C-b>'] = cmp.mapping.scroll_docs(-4),
		['<C-f>'] = cmp.mapping.scroll_docs(4),
		['<C-Space>'] = cmp.mapping.complete(),
		['<C-e>'] = cmp.mapping.abort(),
		['<CR>'] = cmp.mapping.confirm({ select = true }), -- Accept currently selected item. Set `select` to `false` to only confirm explicitly selected items.
	}),
	sources = cmp.config.sources({
		{ name = 'nvim_lsp', keyword_length = 3 },
		{ name = 'luasnip', keyword_length = 2 },
	}, {
		{ name = 'buffer', keyword_length = 3 },
	})
})

-- configure completion for specific filetype
cmp.setup.filetype('gitcommit', {
	sources = cmp.config.sources({
		{ name = 'buffer' },
	}),
})

-- use buffer source for `/` and `?` (if you enabled `native_menu`, this won't
-- work anymore)
cmp.setup.cmdline({ '/', '?' }, {
	mapping = cmp.mapping.preset.cmdline(),
	sources = {
		{ name = 'buffer' }
	},
})

-- use cmdline & path source for ':' (if you enabled `native_menu`, this won't
-- work anymore).
cmp.setup.cmdline(':', {
	mapping = cmp.mapping.preset.cmdline(),
	sources = cmp.config.sources({
		{ name = 'path' }
	}, {
		{ name = 'cmdline' }
	}),
})