local function on_attach(_, bufnr)
	local nmap = function(keys, func, desc)
		if desc then
			desc = 'LSP: ' .. desc
		end
		vim.keymap.set('n', keys, func, { buffer = bufnr, desc = desc })
	end

	nmap('<leader>rn', vim.lsp.buf.rename, '[R]e[n]ame')
	nmap('<leader>ca', vim.lsp.buf.code_action, '[C]ode [A]ction')

	nmap('gd', require('telescope.builtin').lsp_definitions, '[G]oto [D]efinition')
	nmap('gr', require('telescope.builtin').lsp_references, '[G]oto [R]eferences')
	nmap('gI', require('telescope.builtin').lsp_implementations, '[G]oto [I]mplementation')
	nmap('<leader>D', require('telescope.builtin').lsp_type_definitions, 'Type [D]efinition')
	nmap('<leader>ds', require('telescope.builtin').lsp_document_symbols, '[D]ocument [S]ymbols')
	nmap('<leader>ws', require('telescope.builtin').lsp_dynamic_workspace_symbols, '[W]orkspace [S]ymbols')

	-- See `:help K` for why this keymap
	nmap('K', vim.lsp.buf.hover, 'Hover Documentation')
	nmap('<C-k>', vim.lsp.buf.signature_help, 'Signature Documentation')

	-- Lesser used LSP functionality
	nmap('gD', vim.lsp.buf.declaration, '[G]oto [D]eclaration')
	nmap('<leader>wa', vim.lsp.buf.add_workspace_folder, '[W]orkspace [A]dd Folder')
	nmap('<leader>wr', vim.lsp.buf.remove_workspace_folder, '[W]orkspace [R]emove Folder')
	nmap('<leader>wl', function()
		print(vim.inspect(vim.lsp.buf.list_workspace_folders()))
	end, '[W]orkspace [L]ist Folders')

	-- Create a command `:Format` local to the LSP buffer
	vim.api.nvim_buf_create_user_command(bufnr, 'Format', function(_)
		vim.lsp.buf.format()
	end, { desc = 'Format current buffer with LSP' })
end

local function config()
	local mason = require 'mason'
	local mason_lspconfig = require 'mason-lspconfig'
	local neodev = require 'neodev'

	mason.setup()
	neodev.setup()

	local servers = {
		-- clangd = {},
		-- pyright = {},
		-- rust_analyzer = {},
		-- tsserver = {},
		-- html = { filetypes = { 'html', 'twig', 'hbs'} },
		gopls = {},
		lua_ls = {
			Lua = {
				workspace = { checkThirdParty = false },
				telemetry = { enable = false },
			},
		},
	}

	local capabilities = vim.lsp.protocol.make_client_capabilities()
	capabilities = require('cmp_nvim_lsp').default_capabilities(capabilities)

	mason_lspconfig.setup {
		ensure_installed = vim.tbl_keys(servers),
	}

	mason_lspconfig.setup_handlers {
		function(server_name)
			require('lspconfig')[server_name].setup {
				capabilities = capabilities,
				on_attach = on_attach,
				settings = servers[server_name],
				filetypes = (servers[server_name] or {}).filetypes,
			}
		end,
	}
end

return {
	-- LSP Configuration & Plugins
	'neovim/nvim-lspconfig',
	config = config,
	dependencies = {
		-- Automatically install LSPs to stdpath for neovim
		'williamboman/mason.nvim',
		'williamboman/mason-lspconfig.nvim',
		-- Useful status updates for LSP
		{ 'j-hui/fidget.nvim', tag = 'legacy', opts = {} },
		-- Additional lua configuration, makes nvim stuff amazing!
		'folke/neodev.nvim',
		'folke/trouble.nvim',
	},
}