local telescope_mapper = require("alpha.telescope.mappings")

local filetype_attach = setmetatable({
	go = function(_)
		vim.cmd([[
      augroup lsp_buf_format
        au! BufWritePre <buffer>
        autocmd BufWritePre <buffer> :lua vim.lsp.buf.formatting_sync()
      augroup END
    ]])
	end,
}, {
	__index = function()
		return function() end
	end,
})

local function on_attach(client)
	local filetype = vim.api.nvim_buf_get_option(0, "filetype")
	-- keymaps for lsp
	vim.keymap.set("n", "K", vim.lsp.buf.hover, { buffer = 0 })
	vim.keymap.set("n", "<c-]>", vim.lsp.buf.definition, { buffer = 0 })
	vim.keymap.set("n", "<leader>vrn", vim.lsp.buf.rename, { buffer = 0 })
	vim.keymap.set("n", "<leader>vf", vim.lsp.buf.formatting, { buffer = 0 })
	vim.keymap.set("n", "<leader>vn", vim.lsp.diagnostic.goto_next, { buffer = 0 })
	vim.keymap.set("n", "<leader>vp", vim.lsp.diagnostic.goto_prev, { buffer = 0 })

	telescope_mapper("gr", "lsp_references", nil, true)
	telescope_mapper("<leader>pv", "find_symbol", nil, true)

	vim.api.nvim_set_keymap("n", "<leader>vo", ":LspRestart<cr>", { noremap = true })

	require("lsp_signature").on_attach()

	vim.bo.omnifunc = "v:lua.vim.lsp.omnifunc"
	-- Attach any filetype specific options to the client
	filetype_attach[filetype](client)
end

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

lsp_installer.on_server_ready(function(server)
	local opts = {}

	-- (optional) Customize the options passed to the server
	if server.name == "emmet_ls" then
		opts.filetypes = { "html", "css", "blade", "typescriptreact" }
	end

	opts.on_attach = on_attach
	-- This setup() function is exactly the same as lspconfig's setup function (:help lspconfig-quickstart)
	server:setup(opts)
	vim.cmd([[ do User LspAttachBuffers ]])
end)

vim.lsp.handlers["textDocument/publishDiagnostics"] = vim.lsp.with(vim.lsp.diagnostic.on_publish_diagnostics, {
	underline = true,
	update_in_insert = false,
	virtual_text = { spacing = 2, prefix = "●" },
	severity_sort = true,
})

local signs = { Error = " ", Warn = " ", Hint = " ", Info = " " }
for type, icon in pairs(signs) do
	local hl = "DiagnosticSign" .. type
	vim.fn.sign_define(hl, { text = icon, texthl = hl, numhl = "" })
end