class MainActivity : AppCompatActivity() {

    var menu: Menu? = null

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        recycleView_main.layoutManager = LinearLayoutManager(this)

        fetchAndBuildList()

    }

    private fun fetchAndBuildList() {
        val request = Request.Builder().url("http://192.168.2.101/api/v1/user").build()
        val client = OkHttpClient()

        client.newCall(request).enqueue(object : Callback {
            override fun onFailure(call: Call, e: IOException) {
                TODO("not implemented")
            }

            override fun onResponse(call: Call, response: Response) {
                val gson = GsonBuilder().create()
                val userList = gson.fromJson(response.body()?.string(), Array<SimpleUser>::class.java)

                runOnUiThread {
                    val adapter = MainListAdapter(userList)

                    recycleView_main.adapter = adapter

                    setMenuFiltering(adapter)
                }
            }

        })
    }

    private fun setMenuFiltering(adapter: MainListAdapter) {
        val searchView = menu?.findItem(R.id.menu_search)?.actionView as SearchView

        searchView.setOnQueryTextListener(object : SearchView.OnQueryTextListener {

            override fun onQueryTextSubmit(string: String?) = true

            override fun onQueryTextChange(string: String?): Boolean {
                adapter.filter.filter(string)
                return true
            }

        })
    }

    override fun onCreateOptionsMenu(menu: Menu?): Boolean {

        menuInflater.inflate(R.menu.main, menu)

        this.menu = menu

        return super.onCreateOptionsMenu(menu)
    }
}