local lsp_installer = require("nvim-lsp-installer")

local on_attach = function(client, bufnr)
	local function buf_set_keymap(...)
		vim.api.nvim_buf_set_keymap(bufnr, ...)
	end
	local function buf_set_option(...)
		vim.api.nvim_buf_set_option(bufnr, ...)
	end

	buf_set_option("omnifunc", "v:lua.vim.lsp.omnifunc")

	local opts = { noremap = true, silent = true }

	buf_set_keymap("n", "gd", ":lua vim.lsp.buf.definition()<CR>", opts) --> jumps to the definition of the symbol under the cursor
	buf_set_keymap("n", "<leader>lh", ":lua vim.lsp.buf.hover()<CR>", opts) --> information about the symbol under the cursos in a floating window
	buf_set_keymap("n", "gi", ":lua vim.lsp.buf.implementation()<CR>", opts) --> lists all the implementations for the symbol under the cursor in the quickfix window
	buf_set_keymap("n", "<leader>rn", ":lua vim.lsp.util.rename()<CR>", opts) --> renaname old_fname to new_fname
	buf_set_keymap("n", "<leader>ca", ":lua vim.lsp.buf.code_action()<CR>", opts) --> selects a code action available at the current cursor position
	buf_set_keymap("n", "gr", ":lua vim.lsp.buf.references()<CR>", opts) --> lists all the references to the symbl under the cursor in the quickfix window
	buf_set_keymap("n", "<leader>ld", ":lua vim.diagnostic.open_float()<CR>", opts)
	buf_set_keymap("n", "[d", ":lua vim.diagnostic.goto_prev()<CR>", opts)
	buf_set_keymap("n", "]d", ":lua vim.diagnostic.goto_next()<CR>", opts)
	buf_set_keymap("n", "<leader>lq", ":lua vim.diagnostic.setloclist()<CR>", opts)
	buf_set_keymap("n", "<leader>lf", ":lua vim.lsp.buf.formatting()<CR>", opts) --> formats the current buffer
end

local servers = {
	--"bashls",
	--"cssls",
	--"eslint",
	--"ltex",
	"sumneko_lua",
	--"tsserver",
	--"pyright",
	"jedi_language_server",
}

---@diagnostic disable-next-line: undefined-global 
local capabilities = vim.lsp.protocol.make_client_capabilities()
capabilities = require("cmp_nvim_lsp").default_capabilities(capabilities)

for _, name in pairs(servers) do
	local server_is_found, server = lsp_installer.get_server(name)
	if server_is_found then
		if not server:is_installed() then
			print("Installing " .. name)
			server:install()
		end
	end
end

lsp_installer.on_server_ready(function(server)
	-- Specify the default options which we'll use to setup all servers
	local default_opts = {
		on_attach = on_attach,
		capabilities = capabilities,
	}

	server:setup(default_opts)
end)