DotFiles/nvim/lua/plugins/autocompletion.lua

return {
	"hrsh7th/nvim-cmp",
	dependencies = {
		-- Snippet Engine & its associated nvim-cmp source
		{
			"L3MON4D3/LuaSnip",
			build = (function()
				-- Build Step is needed for regex support in snippets.
				-- This step is not supported in many windows environments.
				-- Remove the below condition to re-enable on windows.
				if vim.fn.has("win32") == 1 or vim.fn.executable("make") == 0 then
					return
				end
				return "make install_jsregexp"
			end)(),
			dependencies = {
				-- `friendly-snippets` contains a variety of premade snippets.
				--    See the README about individual language/framework/plugin snippets:
				--    https://github.com/rafamadriz/friendly-snippets
				{
					"rafamadriz/friendly-snippets",
					config = function()
						require("luasnip.loaders.from_vscode").lazy_load()
					end,
				},
			},
		},
		"saadparwaiz1/cmp_luasnip",

		-- Adds other completion capabilities.
		--  nvim-cmp does not ship with all sources by default. They are split
		--  into multiple repos for maintenance purposes.
		"hrsh7th/cmp-nvim-lsp",
		"hrsh7th/cmp-buffer",
		"hrsh7th/cmp-path",
	},
	config = function()
		-- See `:help cmp`
		local cmp = require("cmp")
		local luasnip = require("luasnip")
		luasnip.config.setup({})

		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,
			},
			completion = { completeopt = "menu,menuone,noselect" },
			preselect = cmp.PreselectMode.None,

			-- For an understanding of why these mappings were
			-- chosen, you will need to read `:help ins-completion`
			--
			-- No, but seriously. Please read `:help ins-completion`, it is really good!
			mapping = cmp.mapping.preset.insert({
				-- Select the [n]ext item
				["<C-n>"] = cmp.mapping.select_next_item(),
				-- Select the [p]revious item
				["<C-p>"] = cmp.mapping.select_prev_item(),

				-- Scroll the documentation window [b]ack / [f]orward
				["<C-b>"] = cmp.mapping.scroll_docs(-4),
				["<C-f>"] = cmp.mapping.scroll_docs(4),

				-- Accept ([y]es) the completion.
				--  This will auto-import if your LSP supports it.
				--  This will expand snippets if the LSP sent a snippet.
				["<C-l>"] = cmp.mapping.confirm({ select = true }),

				-- If you prefer more traditional completion keymaps,
				-- you can uncomment the following lines
				--['<CR>'] = cmp.mapping.confirm { select = true },
				--['<Tab>'] = cmp.mapping.select_next_item(),
				--['<S-Tab>'] = cmp.mapping.select_prev_item(),

				-- Manually trigger a completion from nvim-cmp.
				--  Generally you don't need this, because nvim-cmp will display
				--  completions whenever it has completion options available.
				["<C-Space>"] = cmp.mapping.complete({}),

				-- Think of <c-l> as moving to the right of your snippet expansion.
				--  So if you have a snippet that's like:
				--  function $name($args)
				--    $body
				--  end
				--
				-- <c-l> will move you to the right of each of the expansion locations.
				-- <c-h> is similar, except moving you backwards.
				-- ['<C-l>'] = cmp.mapping(function()
				--   if luasnip.expand_or_locally_jumpable() then
				--     luasnip.expand_or_jump()
				--   end
				-- end, { 'i', 's' }),
				-- ['<C-h>'] = cmp.mapping(function()
				--   if luasnip.locally_jumpable(-1) then
				--     luasnip.jump(-1)
				--   end
				-- end, { 'i', 's' }),
			}),
			sources = {
				{
					name = "lazydev",
					-- set group index to 0 to skip loading LuaLS completions as lazydev recommends it
					group_index = 0,
				},
				{ name = "nvim_lsp" },
				{ 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]",
						luasnip = "[Snippet]",
						buffer = "[Buffer]",
						path = "[Path]",
					})[entry.source.name]
					return vim_item
				end,
			},
		})
	end,
}