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

package com.cyb3rko.techniklogger.fragments

import android.content.Context
import android.content.SharedPreferences
import android.os.Bundle
import android.util.Log
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import androidx.fragment.app.Fragment
import androidx.navigation.fragment.findNavController
import androidx.recyclerview.widget.LinearLayoutManager
import com.cyb3rko.techniklogger.*
import com.cyb3rko.techniklogger.CURRENT_YEAR
import com.cyb3rko.techniklogger.CURRENT_YEAR_NAME
import com.cyb3rko.techniklogger.SHARED_PREFERENCE
import com.cyb3rko.techniklogger.data.ParseController
import com.cyb3rko.techniklogger.data.objects.Year
import com.cyb3rko.techniklogger.databinding.FragmentYearsBinding
import com.cyb3rko.techniklogger.recycler.YearAdapter
import com.google.android.material.dialog.MaterialAlertDialogBuilder
import com.parse.ParseObject
import es.dmoral.toasty.Toasty

class YearsFragment : Fragment() {
    private var _binding: FragmentYearsBinding? = null
    private lateinit var myContext: Context

    private var adminMode: Boolean? = null
    private lateinit var yearAdapter: YearAdapter
    private var data: List<Year> = mutableListOf()
    private lateinit var sharedPref: SharedPreferences
    private lateinit var sharedPrefEditor: SharedPreferences.Editor

    // This property is only valid between onCreateView and onDestroyView.
    private val binding get() = _binding!!

    override fun onCreateView(
        inflater: LayoutInflater,
        container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View {
        _binding = FragmentYearsBinding.inflate(inflater, container, false)
        val root = binding.root
        myContext = requireContext()
        return root
    }

    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)

        sharedPref = myContext.getSharedPreferences(SHARED_PREFERENCE, Context.MODE_PRIVATE)
        sharedPrefEditor = sharedPref.edit()

        binding.loadingAnimation.playAnimation()

        yearAdapter = YearAdapter { year ->
            sharedPrefEditor.putString(CURRENT_YEAR, year.objectId)
            sharedPrefEditor.putString(CURRENT_YEAR_NAME, year.name).commit()
            findNavController().navigate(R.id.navigation_listing)
        }
        binding.recyclerView.apply {
            layoutManager = LinearLayoutManager(myContext)
            adapter = yearAdapter
        }

        loadEntries()

        binding.swipeRefreshLayout.apply {
            setProgressBackgroundColorSchemeResource(R.color.refreshLayoutBackground)
            setColorSchemeResources(R.color.refreshLayoutArrow)
            setOnRefreshListener {
                loadEntries()
            }
        }

        binding.fab.setOnClickListener {
            val current = yearAdapter.currentList[0]
            val currentYear = current.name.split("/")[1]
            val new = "$currentYear/${currentYear.toInt() + 1}"
            MaterialAlertDialogBuilder(myContext)
                .setTitle("Neues Schuljahr")
                .setMessage("Möchtest du das Schuljahr $new hinzufügen?")
                .setPositiveButton(android.R.string.ok) { _, _ ->
                    ParseObject("Jahr").apply {
                        put("name", new)
                        save()
                        loadEntries()
                    }
                }
                .show()
        }

        if (adminMode == null && sharedPref.getString("name", "") != "") {
            updateAdminStatus()
        } else if (adminMode != null && adminMode!!) {
            binding.fab.visibility = View.VISIBLE
        }
    }

    private fun loadEntries() {
        ParseController.fetchYears { years, e ->
            if (e == null) {
                data = years
                showAnimation(false)
                binding.swipeRefreshLayout.isRefreshing = false
                yearAdapter.submitList(years)
                (requireActivity() as MainActivity).setActionBarSubtitle(years.size.toString())
            } else {
                if (e.message != null) {
                    if (e.message != "results not cached") {
                        binding.swipeRefreshLayout.isRefreshing = false
                        if (data.isEmpty()) {
                            showAnimation(true, false)
                        }
                        Toasty.error(myContext, "Abruf fehlgeschlagen", Toasty.LENGTH_SHORT).show()
                        Log.e("TechnikLogger.JahrSuche", e.message.toString())
                        e.printStackTrace()
                    } else {
                        Log.d("TechnikLogger.EinsSuche", "Empty cache, fetching data immediately.")
                    }
                }
            }
        }
    }

    private fun updateAdminStatus() {
        ParseController.fetchAdminStatus(sharedPref.getString("name", "")) { objectId, admin, e ->
            if (e == null) {
                if (admin!!) {
                    adminMode = true
                    sharedPrefEditor.putBoolean("admin", adminMode!!)
                    binding.fab.visibility = View.VISIBLE
                } else {
                    adminMode = false
                    sharedPrefEditor.putBoolean("admin", adminMode!!)
                    binding.fab.visibility = View.INVISIBLE
                }
                sharedPrefEditor.putString("technikerId", objectId).apply()
            } else {
                binding.fab.visibility = View.INVISIBLE
                adminMode = false
                sharedPrefEditor.putString("technikerId", "")
                sharedPrefEditor.putBoolean("admin", adminMode!!).apply()
                Toasty.error(myContext, "Adminstatus unbekannt", Toasty.LENGTH_SHORT).show()
                Log.e("TechnikLogger.TechSuche", e.message.toString())
            }
        }
    }

    private fun showAnimation(show: Boolean, connected: Boolean = true) {
        val viewVisibility = if (show) View.VISIBLE else View.INVISIBLE
        val newSpeed = if (!connected) 1.2f else 1.5f
        val animation = if (connected) "loading.json" else "no-connection.json"
        binding.apply {
            loadingAnimation.apply {
                setAnimation(animation)
                speed = newSpeed
                visibility = viewVisibility
                playAnimation()
            }
        }
    }
}