technik-logger-app/app/src/main/java/com/cyb3rko/techniklogger/ProjectActivity.kt

package com.cyb3rko.techniklogger

import android.os.Bundle
import android.view.Menu
import android.view.MenuItem
import android.view.View
import android.widget.TextView
import android.widget.Toast

import androidx.appcompat.app.AppCompatActivity
import androidx.recyclerview.widget.LinearLayoutManager

import com.afollestad.materialdialogs.MaterialDialog
import com.afollestad.materialdialogs.input.getInputField
import com.afollestad.materialdialogs.input.input
import com.cyb3rko.techniklogger.recycler.ProjectTechnikerViewHolder
import com.cyb3rko.techniklogger.recycler.ProjectTechnikerViewState
import com.google.firebase.database.*

import java.lang.IndexOutOfBoundsException

import me.ibrahimyilmaz.kiel.adapter.RecyclerViewAdapter.Companion.adapterOf

import kotlinx.android.synthetic.main.activity_project.*
import kotlinx.android.synthetic.main.activity_project.recycler_view

class ProjectActivity : AppCompatActivity() {

    private var childKey = ""
    private val techniker: MutableList<ProjectTechnikerViewState.ProjectTechniker> = mutableListOf()
    private lateinit var databaseReference: DatabaseReference

    override fun onCreate(savedInstanceState: Bundle?) {
        childKey = intent.extras?.getString("childKey").toString()
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_project)

        supportActionBar?.setDisplayHomeAsUpEnabled(true)

        databaseReference = FirebaseDatabase.getInstance().getReference(childKey)

        val adapter = adapterOf<ProjectTechnikerViewState> {
            register(
                layoutResource = R.layout.item_recycler_techniker,
                viewHolder = ::ProjectTechnikerViewHolder,
                onBindBindViewHolder = { vh, _, text ->
                    vh.textView.text = text.name
                    vh.itemView.setOnClickListener {
                    }
                }
            )
        }

        val listener = object: ChildEventListener {
            override fun onChildAdded(snapshot: DataSnapshot, previousChildName: String?) {
                techniker.add(techniker.size, ProjectTechnikerViewState.ProjectTechniker(snapshot.value.toString()))
                techniker.sortBy { it.name }
                recycler_view.scheduleLayoutAnimation()
                adapter.notifyDataSetChanged()
                showDivider()
            }

            override fun onChildChanged(snapshot: DataSnapshot, previousChildName: String?) {
            }

            override fun onChildRemoved(snapshot: DataSnapshot) {
                techniker.remove(ProjectTechnikerViewState.ProjectTechniker(snapshot.value.toString()))
                recycler_view.scheduleLayoutAnimation()
                adapter.notifyDataSetChanged()
                emptyCheck()
            }

            override fun onChildMoved(snapshot: DataSnapshot, previousChildName: String?) {
            }

            override fun onCancelled(error: DatabaseError) {
                Toast.makeText(applicationContext, "Abruf fehlgeschlagen", Toast.LENGTH_SHORT).show()
            }
        }

        adapter.submitList(techniker as List<ProjectTechnikerViewState>?)
        recycler_view.layoutManager = LinearLayoutManager(applicationContext)
        recycler_view.adapter = adapter

        databaseReference.child("techniker").addChildEventListener(listener)

        setValueEventListener("name", title_view)
        setValueEventListener("location", location_view)
        setValueEventListener("date", date_view)

        add_button.setOnClickListener {
            MaterialDialog(this)
                .show {
                    message(0, "Möchtest du dich als involvierter Techniker eintragen?")
                    positiveButton(0, "Ja") {
                        val name = getSharedPreferences("Safe", 0).getString("name", "invalid")
                        databaseReference.child("techniker").push().setValue(name)
                    }
                    negativeButton(0, "Abbrechen")
                }
        }

        emptyCheck()
    }

    private fun setValueEventListener(childName: String, textView: TextView) {
        val valueEventListener = object: ValueEventListener {
            override fun onDataChange(snapshot: DataSnapshot) {
                textView.text = snapshot.value.toString()
            }

            override fun onCancelled(error: DatabaseError) {
            }
        }
        databaseReference.child(childName).addListenerForSingleValueEvent(valueEventListener)
    }

    private fun showDivider() {
        divider.visibility = View.VISIBLE
    }

    private fun emptyCheck() {
        if (techniker.isEmpty()) {
            divider.visibility = View.GONE
        }
    }

    private fun showNameDialog() {
        val currentName = getSharedPreferences("Safe", 0).getString("name", "")

        MaterialDialog(this)
            .cancelable(false)
            .title(0, "Bitte gebe deinen Namen ein")
            .show {
                input(hint = "Dein Name", prefill = currentName, waitForPositiveButton = false) { dialog, inputName ->
                    try {
                        if (!inputName[0].isUpperCase()) {
                            dialog.getInputField().error = "Der Anfangsbuchstabe sollte groß sein"
                        }
                    } catch (ignored: IndexOutOfBoundsException) {
                    }

                    positiveButton {
                        getSharedPreferences("Safe", 0).edit().putString("name", inputName.toString()).apply()
                    }
                }
                positiveButton(0, "Speichern")
            }
    }

    override fun onCreateOptionsMenu(menu: Menu): Boolean {
        // Inflate the menu; this adds items to the action bar if it is present.
        menuInflater.inflate(R.menu.menu_main, menu)
        return true
    }

    override fun onOptionsItemSelected(item: MenuItem): Boolean {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        when (item.itemId) {
            android.R.id.home -> finish()
            R.id.action_rename -> showNameDialog()
//            R.id.action_icons -> setContentView(AboutIcons(applicationContext, R.drawable::class.java).setTitle("Benutzte Icons").get())
//            R.id.action_libraries -> LibsBuilder().start(this)
//            R.id.action_privacy_policy ->
//            R.id.action_terms_of_use ->
        }

        return super.onOptionsItemSelected(item)
    }
}