session-android/app/src/main/java/org/thoughtcrime/securesms/groups/JoinCommunityFragment.kt

package org.thoughtcrime.securesms.groups

import android.animation.Animator
import android.animation.AnimatorListenerAdapter
import android.content.Context
import android.content.Intent
import android.os.Bundle
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import android.widget.Toast
import androidx.fragment.app.Fragment
import androidx.lifecycle.lifecycleScope
import com.google.android.material.tabs.TabLayoutMediator
import dagger.hilt.android.AndroidEntryPoint
import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.launch
import kotlinx.coroutines.withContext
import network.loki.messenger.R
import network.loki.messenger.databinding.FragmentJoinCommunityBinding
import org.session.libsession.messaging.MessagingModuleConfiguration
import org.session.libsession.utilities.Address
import org.session.libsession.utilities.GroupUtil
import org.session.libsession.utilities.OpenGroupUrlParser
import org.session.libsession.utilities.recipients.Recipient
import org.session.libsignal.utilities.Log
import org.thoughtcrime.securesms.conversation.start.NewConversationDelegate
import org.thoughtcrime.securesms.conversation.v2.ConversationActivityV2
import org.thoughtcrime.securesms.util.ConfigurationMessageUtilities

@AndroidEntryPoint
class JoinCommunityFragment : Fragment() {

    private lateinit var binding: FragmentJoinCommunityBinding

    lateinit var delegate: NewConversationDelegate

    override fun onCreateView(
        inflater: LayoutInflater, container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View {
        binding = FragmentJoinCommunityBinding.inflate(inflater)
        return binding.root
    }

    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)
        binding.backButton.setOnClickListener { delegate.onDialogBackPressed() }
        binding.closeButton.setOnClickListener { delegate.onDialogClosePressed() }
        fun showLoader() {
            binding.loader.visibility = View.VISIBLE
            binding.loader.animate().setDuration(150).alpha(1.0f).start()
        }

        fun hideLoader() {
            binding.loader.animate().setDuration(150).alpha(0.0f).setListener(object : AnimatorListenerAdapter() {

                override fun onAnimationEnd(animation: Animator) {
                    super.onAnimationEnd(animation)
                    binding.loader.visibility = View.GONE
                }
            })
        }
        fun joinCommunityIfPossible(url: String) {
            val openGroup = try {
                OpenGroupUrlParser.parseUrl(url)
            } catch (e: OpenGroupUrlParser.Error) {
                when (e) {
                    is OpenGroupUrlParser.Error.MalformedURL -> return Toast.makeText(activity, R.string.activity_join_public_chat_error, Toast.LENGTH_SHORT).show()
                    is OpenGroupUrlParser.Error.InvalidPublicKey -> return Toast.makeText(activity, R.string.invalid_public_key, Toast.LENGTH_SHORT).show()
                    is OpenGroupUrlParser.Error.NoPublicKey -> return Toast.makeText(activity, R.string.invalid_public_key, Toast.LENGTH_SHORT).show()
                    is OpenGroupUrlParser.Error.NoRoom -> return Toast.makeText(activity, R.string.activity_join_public_chat_error, Toast.LENGTH_SHORT).show()
                }
            }
            showLoader()
            lifecycleScope.launch(Dispatchers.IO) {
                try {
                    val sanitizedServer = openGroup.server.removeSuffix("/")
                    val openGroupID = "$sanitizedServer.${openGroup.room}"
                    OpenGroupManager.add(sanitizedServer, openGroup.room, openGroup.serverPublicKey, requireContext())
                    val storage = MessagingModuleConfiguration.shared.storage
                    storage.onOpenGroupAdded(sanitizedServer, openGroup.room)
                    val threadID = GroupManager.getOpenGroupThreadID(openGroupID, requireContext())
                    val groupID = GroupUtil.getEncodedOpenGroupID(openGroupID.toByteArray())

                    ConfigurationMessageUtilities.forceSyncConfigurationNowIfNeeded(requireContext())
                    withContext(Dispatchers.Main) {
                        val recipient = Recipient.from(requireContext(), Address.fromSerialized(groupID), false)
                        openConversationActivity(requireContext(), threadID, recipient)
                        delegate.onDialogClosePressed()
                    }
                } catch (e: Exception) {
                    Log.e("Loki", "Couldn't join open group.", e)
                    withContext(Dispatchers.Main) {
                        hideLoader()
                        Toast.makeText(activity, R.string.activity_join_public_chat_error, Toast.LENGTH_SHORT).show()
                    }
                    return@launch
                }
            }
        }
        val urlDelegate = { url: String -> joinCommunityIfPossible(url) }
        binding.viewPager.adapter = JoinCommunityFragmentAdapter(
            parentFragment = this,
            enterCommunityUrlDelegate = urlDelegate,
            scanQrCodeDelegate = urlDelegate
        )
        val mediator = TabLayoutMediator(binding.tabLayout, binding.viewPager) { tab, pos ->
            tab.text = when (pos) {
                0 -> getString(R.string.activity_join_public_chat_enter_community_url_tab_title)
                1 -> getString(R.string.activity_join_public_chat_scan_qr_code_tab_title)
                else -> throw IllegalStateException()
            }
        }
        mediator.attach()
    }

    private fun openConversationActivity(context: Context, threadId: Long, recipient: Recipient) {
        val intent = Intent(context, ConversationActivityV2::class.java)
        intent.putExtra(ConversationActivityV2.THREAD_ID, threadId)
        intent.putExtra(ConversationActivityV2.ADDRESS, recipient.address)
        context.startActivity(intent)
    }

}