vim.bo.expandtab = true
vim.bo.tabstop = 4
vim.bo.shiftwidth = 4

require'lsphelp'

local jdtls_home = os.getenv('HOME') .. '/Projects/lsp/eclipse.jdt.ls/org.eclipse.jdt.ls.product/target/repository'
local project_name = vim.fn.fnamemodify(vim.fn.getcwd(), ':p:h:t')
local jdtls = require'jdtls'

-- The on_attach function is used to set key maps after the language server
-- attaches to the current buffer
local on_attach = function(client, bufnr)
	default_on_attach(client, bufnr)

	-- Java extensions provided by jdtls
	nnoremap("<C-o>", jdtls.organize_imports, bufopts, "Organize imports")
	nnoremap("<space>ev", jdtls.extract_variable, bufopts, "Extract variable")
	nnoremap("<space>ec", jdtls.extract_constant, bufopts, "Extract constant")
	vim.keymap.set('v', "<space>em", [[<ESC><CMD>lua require('jdtls').extract_method(true)<CR>]],
		{ noremap=true, silent=true, buffer=bufnr, desc = "Extract method" })
end

-- See `:help vim.lsp.start_client` for an overview of the supported `config` options.
local config = {
  on_attach = on_attach,  -- We pass our on_attach keybindings to the configuration map
  flags = {
    debounce_text_changes = 150,
  },

  -- The command that starts the language server
  -- See: https://github.com/eclipse/eclipse.jdt.ls#running-from-the-command-line
  cmd = {
    'java',

    '-Declipse.application=org.eclipse.jdt.ls.core.id1',
    '-Dosgi.bundles.defaultStartLevel=4',
    '-Declipse.product=org.eclipse.jdt.ls.core.product',
    '-Dlog.protocol=true',
    '-Dlog.level=ALL',
    '-Xms1g',
    '--add-modules=ALL-SYSTEM',
    '--add-opens', 'java.base/java.util=ALL-UNNAMED',
    '--add-opens', 'java.base/java.lang=ALL-UNNAMED',

    '-jar', jdtls_home .. '/plugins/org.eclipse.equinox.launcher_1.6.900.v20240613-2009.jar',
    '-configuration', jdtls_home .. '/config_linux',
    '-data', os.getenv('HOME') .. '/.cache/jdtls/' .. project_name
  },

  -- This is the default if not provided, you can remove it. Or adjust as needed.
  -- One dedicated LSP server & client will be started per unique root_dir
  root_dir = vim.fs.root(0, {'.git', 'mvnw', 'gradlew', 'build.gradle'}),

  -- Here you can configure eclipse.jdt.ls specific settings
  -- See https://github.com/eclipse/eclipse.jdt.ls/wiki/Running-the-JAVA-LS-server-from-the-command-line#initialize-request
  -- for a list of options
  settings = {
    java = {
      signatureHelp = { enabled = true },
      jdt = {
        ls = {
          androidSupport = { enabled = true },
        }
      }
    }
  },

  -- Language server `initializationOptions`
  -- You need to extend the `bundles` with paths to jar files
  -- if you want to use additional eclipse.jdt.ls plugins.
  --
  -- See https://github.com/mfussenegger/nvim-jdtls#java-debug-installation
  --
  -- If you don't plan on using the debugger or other eclipse.jdt.ls plugins you can remove this
  init_options = {
    bundles = {}
  },
}
-- This starts a new client & server,
-- or attaches to an existing client & server depending on the `root_dir`.
jdtls.start_or_attach(config)