local nvim_lsp = require('lspconfig')

-- Use a loop to conveniently call 'setup' on multiple servers and
-- map buffer local keybindings when the language server attaches
local servers = {
	-- npm i -g bash-language-server
	-- TODO - don't run for sh files but have something else instead - shellcheck?
	-- no formatting support
	'bashls',

	-- npm i -g vscode-langservers-extracted
	-- no formatting support
	'cssls',

	-- npm install -g intelephense
	-- suports formatting
	'intelephense',

	--   https://phpactor.readthedocs.io/en/master/usage/standalone.html
	'phpactor',

	-- npm install -g pyright
	-- static type checker
	'pyright',

	-- https://github.com/neovim/nvim-lspconfig/wiki
	-- 'tailwindcss',
	-- npm install -g  typescript typescript-language-server
	-- supports formatting
	'tsserver',

	-- npm install -g vim-language-server
	-- no formatting support
	'vimls',

	-- vue
	-- use vetur

	'yamlls',
	-- no formatting support
}

-- Use an on_attach function to only map the following keys
-- after the language server attaches to the current buffer
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

  -- Enable completion triggered by <c-x><c-o>
  buf_set_option('omnifunc', 'v:lua.vim.lsp.omnifunc')
  -- Mappings.
  local opts = { noremap=true, silent=true }
  -- See `:help vim.lsp.*` for documentation on any of the below functions
  buf_set_keymap('n', '[d', '<cmd>lua vim.diagnostic.goto_prev({float = {...}})<CR>', opts)
  buf_set_keymap('n', ']d', '<cmd>lua vim.diagnostic.goto_next({float = {...}})<CR>', opts)
  buf_set_keymap('n', 'gd', '<cmd>lua vim.lsp.buf.definition()<CR>', opts)
  buf_set_keymap('n', 'gD', '<cmd>lua vim.lsp.buf.declaration()<CR>', opts)
  buf_set_keymap('n', 'gi', '<cmd>lua vim.lsp.buf.implementation()<CR>', opts)
  buf_set_keymap('n', 'gr', '<cmd>lua vim.lsp.buf.references()<CR>', opts)
  buf_set_keymap('n', 'gl', '<cmd>lua vim.diagnostic.open_float(buffer, {{opts}, scope="line", pos=17})<CR>', opts)
  buf_set_keymap('n', 'gh', '<cmd>lua vim.lsp.buf.hover()<CR>', opts)
  buf_set_keymap('n', '<C-k>', '<cmd>lua vim.lsp.buf.signature_help()<CR>', opts)
  buf_set_keymap('n', '<space>T', '<cmd>lua vim.lsp.buf.type_definition()<CR>', opts)
  buf_set_keymap('n', '<space>l', '<cmd>lua vim.diagnostic.setloclist()<CR>', opts)
  buf_set_keymap('n', '<space>q', '<cmd>lua vim.diagnostic.setqflist()<CR>', opts)
  buf_set_keymap('n', '<space>ca', '<cmd>lua vim.lsp.buf.code_action()<CR>', opts)
  buf_set_keymap('n', '<space>rn', '<cmd>lua vim.lsp.buf.rename()<CR>', opts)
  -- buf_set_keymap('n', '<space>f', '<cmd>lua vim.lsp.buf.formatting()<CR>', opts)
  -- buf_set_keymap('n', '<space>wa', '<cmd>lua vim.lsp.buf.add_workspace_folder()<CR>', opts)
  -- buf_set_keymap('n', '<space>wr', '<cmd>lua vim.lsp.buf.remove_workspace_folder()<CR>', opts)
  -- buf_set_keymap('n', '<space>wl', '<cmd>lua print(vim.inspect(vim.lsp.buf.list_workspace_folders()))<CR>', opts)

	if client.name == 'tsserver' or client.name == 'intelephense' then
		client.resolved_capabilities.document_formatting = false;
	end

  if client.resolved_capabilities.document_formatting then
    vim.cmd [[augroup lsp_formatting]]
    vim.cmd [[autocmd!]]
		vim.cmd [[autocmd BufWritePre <buffer> :lua vim.lsp.buf.formatting_seq_sync({}, 3000)]]
    vim.cmd [[augroup END]]
  end
end

local capabilities = vim.lsp.protocol.make_client_capabilities()
capabilities = require('cmp_nvim_lsp').update_capabilities(capabilities)
capabilities.textDocument.completion.completionItem.snippetSupport = true

for _, lsp in ipairs(servers) do
  nvim_lsp[lsp].setup {
    on_attach = on_attach,
		capabilities = capabilities,
    flags = {
      debounce_text_changes = 150,
    }
  }
end

local runtime_path = vim.split(package.path, ';')
table.insert(runtime_path, "lua/?.lua")
table.insert(runtime_path, "lua/?/init.lua")

require'lspconfig'.sumneko_lua.setup {
  settings = {
    Lua = {
      runtime = {
        -- Tell the language server which version of Lua you're using (most likely LuaJIT in the case of Neovim)
        version = 'LuaJIT',
        -- Setup your lua path
        path = runtime_path,
      },
      diagnostics = {
        -- Get the language server to recognize the `vim` global
        globals = {'vim'},
      },
      workspace = {
        -- Make the server aware of Neovim runtime files
        library = vim.api.nvim_get_runtime_file("", true),
      },
      -- Do not send telemetry data containing a randomized but unique identifier
      telemetry = {
        enable = false,
      },
    },
  },
}