package io.heckel.ntfy.ui

import android.app.AlertDialog
import android.content.Intent
import android.os.Bundle
import android.text.Html
import android.util.Log
import android.view.Menu
import android.view.MenuItem
import android.view.View
import android.widget.TextView
import android.widget.Toast
import androidx.activity.viewModels
import androidx.appcompat.app.AppCompatActivity
import androidx.recyclerview.widget.RecyclerView
import com.android.volley.toolbox.StringRequest
import com.android.volley.toolbox.Volley
import io.heckel.ntfy.R
import io.heckel.ntfy.app.Application
import io.heckel.ntfy.data.Notification
import io.heckel.ntfy.data.topicShortUrl
import io.heckel.ntfy.data.topicUrl
import java.util.*


class DetailActivity : AppCompatActivity() {
    private val viewModel by viewModels<DetailViewModel> {
        DetailViewModelFactory((application as Application).repository)
    }
    private var subscriptionId: Long = 0L // Set in onCreate()
    private var subscriptionBaseUrl: String = "" // Set in onCreate()
    private var subscriptionTopic: String = "" // Set in onCreate()

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.detail_activity)
        supportActionBar?.setDisplayHomeAsUpEnabled(true) // Show 'Back' button

        // Get extras required for the return to the main activity
        subscriptionId = intent.getLongExtra(MainActivity.EXTRA_SUBSCRIPTION_ID, 0)
        subscriptionBaseUrl = intent.getStringExtra(MainActivity.EXTRA_SUBSCRIPTION_BASE_URL) ?: return
        subscriptionTopic = intent.getStringExtra(MainActivity.EXTRA_SUBSCRIPTION_TOPIC) ?: return

        // Set title
        val subscriptionBaseUrl = intent.getStringExtra(MainActivity.EXTRA_SUBSCRIPTION_BASE_URL) ?: return
        val topicUrl = topicShortUrl(subscriptionBaseUrl, subscriptionTopic)
        title = topicUrl

        // Set "how to instructions"
        val howToExample: TextView = findViewById(R.id.detail_how_to_example)
        howToExample.linksClickable = true

        val howToText = getString(R.string.detail_how_to_example, topicUrl)
        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.N) {
            howToExample.text = Html.fromHtml(howToText, Html.FROM_HTML_MODE_LEGACY)
        } else {
            howToExample.text = Html.fromHtml(howToText)
        }

        // Update main list based on viewModel (& its datasource/livedata)
        val noEntriesText: View = findViewById(R.id.detail_no_notifications)
        val adapter = DetailAdapter { notification -> onNotificationClick(notification) }
        val mainList: RecyclerView = findViewById(R.id.detail_notification_list)
        mainList.adapter = adapter

        viewModel.list(subscriptionId).observe(this) {
            it?.let {
                adapter.submitList(it as MutableList<Notification>)
                if (it.isEmpty()) {
                    mainList.visibility = View.GONE
                    noEntriesText.visibility = View.VISIBLE
                } else {
                    mainList.visibility = View.VISIBLE
                    noEntriesText.visibility = View.GONE
                }
            }
        }
    }

    override fun onCreateOptionsMenu(menu: Menu): Boolean {
        menuInflater.inflate(R.menu.detail_action_bar_menu, menu)
        return true
    }

    override fun onOptionsItemSelected(item: MenuItem): Boolean {
        return when (item.itemId) {
            R.id.detail_menu_test -> {
                onTestClick()
                true
            }
            R.id.detail_menu_unsubscribe -> {
                onDeleteClick()
                true
            }
            else -> super.onOptionsItemSelected(item)
        }
    }

    private fun onTestClick() {
        val url = topicUrl(subscriptionBaseUrl, subscriptionTopic)
        Log.d(TAG, "Sending test notification to $url")

        val queue = Volley.newRequestQueue(this) // This should be a Singleton :-O
        val stringRequest = object : StringRequest(
            Method.PUT,
            url,
            { _ -> /* Do nothing */ },
            { error ->
                Toast
                    .makeText(this, getString(R.string.detail_test_message_error, error.message), Toast.LENGTH_LONG)
                    .show()
            }
        ) {
            override fun getBody(): ByteArray {
                return getString(R.string.detail_test_message, Date().toString()).toByteArray()
            }
        }
        queue.add(stringRequest)
    }

    private fun onDeleteClick() {
        Log.d(TAG, "Deleting subscription ${topicShortUrl(subscriptionBaseUrl, subscriptionTopic)}")

        val builder = AlertDialog.Builder(this)
        builder
            .setMessage(R.string.detail_delete_dialog_message)
            .setPositiveButton(R.string.detail_delete_dialog_permanently_delete) { _, _ ->
                // Return to main activity
                val result = Intent()
                    .putExtra(MainActivity.EXTRA_SUBSCRIPTION_ID, subscriptionId)
                    .putExtra(MainActivity.EXTRA_SUBSCRIPTION_TOPIC, subscriptionTopic)
                setResult(RESULT_OK, result)
                finish()

                // Delete notifications
                viewModel.removeAll(subscriptionId)
            }
            .setNegativeButton(R.string.detail_delete_dialog_cancel) { _, _ -> /* Do nothing */ }
            .create()
            .show()
    }

    private fun onNotificationClick(notification: Notification) {
        // TODO Do something
    }

    companion object {
        const val TAG = "NtfyDetailActivity"
    }
}