local lsp = require("lsp-zero")

lsp.preset("recommended")

local language_servers = {
	'tsserver',
	'eslint',
	'gopls',
}

local linux_language_servers = {
  'sumneko_lua',
  'rust_analyzer',
  'clangd',
}

if io.popen("uname"):read("*a") == "Linux" then
	for key, val in pairs(linux_language_servers) do
		language_servers[key] = val
	end
end

lsp.ensure_installed(language_servers)

-- Fix Undefined global 'vim'
lsp.configure('sumneko_lua', {
    settings = {
        Lua = {
            diagnostics = {
                globals = { 'vim' }
            }
        }
    }
})


local cmp = require('cmp')
local cmp_select = {behavior = cmp.SelectBehavior.Select}
local cmp_mappings = lsp.defaults.cmp_mappings({
  ['<C-p>'] = cmp.mapping.select_prev_item(cmp_select),
  ['<C-n>'] = cmp.mapping.select_next_item(cmp_select),
  ['<C-y>'] = cmp.mapping.confirm({ select = true }),
  ["<C-Space>"] = cmp.mapping.complete(),
})

-- disable completion with tab
-- this helps with copilot setup
cmp_mappings['<Tab>'] = nil
cmp_mappings['<S-Tab>'] = nil

lsp.setup_nvim_cmp({
	preselect = 'none',
	mapping = cmp_mappings,
	completion = {
		completeopt = 'menu,menuone,noinsert,noselect'
	}
})

lsp.set_preferences({
    suggest_lsp_servers = false,
    sign_icons = {
        error = 'E',
        warn = 'W',
        hint = 'H',
        info = 'I'
    }
})

lsp.on_attach(function(client, bufnr)
  local opts = {buffer = bufnr, remap = false}

  if client.name == "eslint" then
      vim.cmd.LspStop('eslint')
      return
  end

  local nmap = function(keys, func, desc)
      if desc then
          desc = 'LSP: ' .. desc
      end

      vim.keymap.set('n', keys, func, { buffer = bufnr, desc = desc })
  end

  -- goto defintion
  -- vim.keymap.set("n", "gd", vim.lsp.buf.definition, opts)
  -- hover docs
  vim.keymap.set("n", "K", vim.lsp.buf.hover, opts)

  nmap('<leader>rn', vim.lsp.buf.rename, '[R]e[n]ame')
  nmap('<leader>ca', vim.lsp.buf.code_action, '[C]ode [A]ction')
  nmap("<leader>gr", vim.lsp.buf.references, '[G]oto [R]eferences')
  nmap('gd', vim.lsp.buf.definition, '[G]oto [D]efinition')

  nmap('gI', vim.lsp.buf.implementation, '[G]oto [I]mplementation')
  nmap('<leader>D', vim.lsp.buf.type_definition, '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')



  -- vim.keymap.set("n", "<leader>vws", vim.lsp.buf.workspace_symbol, opts)
  -- vim.keymap.set("n", "<leader>vd", vim.diagnostic.open_float, opts)
  -- vim.keymap.set("n", "[d", vim.diagnostic.goto_next, opts)
  -- vim.keymap.set("n", "]d", vim.diagnostic.goto_prev, opts)
  -- vim.keymap.set("n", "<leader>vca", vim.lsp.buf.code_action, opts)
  -- vim.keymap.set("n", "<leader>vrn", vim.lsp.buf.rename, opts)
  -- vim.keymap.set("i", "<C-h>", vim.lsp.buf.signature_help, opts)
end)

lsp.setup()

vim.diagnostic.config({
    virtual_text = true,
})