session-android/app/src/main/java/org/thoughtcrime/securesms/conversation/v2/ConversationActivityV2.kt

package org.thoughtcrime.securesms.conversation.v2

import android.database.Cursor
import android.os.Bundle
import android.util.Log
import androidx.loader.app.LoaderManager
import androidx.loader.content.Loader
import androidx.recyclerview.widget.ItemTouchHelper
import androidx.recyclerview.widget.LinearLayoutManager
import kotlinx.android.synthetic.main.activity_conversation_v2.*
import kotlinx.android.synthetic.main.activity_conversation_v2_action_bar.*
import network.loki.messenger.R
import org.thoughtcrime.securesms.PassphraseRequiredActionBarActivity
import org.thoughtcrime.securesms.database.DatabaseFactory
import org.thoughtcrime.securesms.mms.GlideApp

class ConversationActivityV2 : PassphraseRequiredActionBarActivity() {
    private var threadID: Long = -1

    private val adapter by lazy {
        val cursor = DatabaseFactory.getMmsSmsDatabase(this).getConversation(threadID)
        val adapter = ConversationAdapter(this, cursor)
        adapter.setHasStableIds(true)
        adapter
    }

    private val thread by lazy {
        DatabaseFactory.getThreadDatabase(this).getRecipientForThreadId(threadID)!!
    }

    private val glide by lazy { GlideApp.with(this) }

    // region Settings
    companion object {
        const val THREAD_ID = "thread_id"
    }
    // endregion

    // region Lifecycle
    override fun onCreate(savedInstanceState: Bundle?, isReady: Boolean) {
        super.onCreate(savedInstanceState, isReady)
        setContentView(R.layout.activity_conversation_v2)
        threadID = intent.getLongExtra(THREAD_ID, -1)
        setUpRecyclerView()
        setUpToolbar()
    }

    private fun setUpRecyclerView() {
        conversationRecyclerView.adapter = adapter
        val layoutManager = LinearLayoutManager(this)
        layoutManager.reverseLayout = true
        layoutManager.stackFromEnd = true
        conversationRecyclerView.layoutManager = layoutManager
        // Workaround for the fact that CursorRecyclerViewAdapter doesn't actually auto-update automatically (even though it says it will)
        LoaderManager.getInstance(this).restartLoader(0, null, object : LoaderManager.LoaderCallbacks<Cursor> {

            override fun onCreateLoader(id: Int, bundle: Bundle?): Loader<Cursor> {
                return ConversationLoader(threadID, this@ConversationActivityV2)
            }

            override fun onLoadFinished(loader: Loader<Cursor>, cursor: Cursor?) {
                adapter.changeCursor(cursor)
            }

            override fun onLoaderReset(cursor: Loader<Cursor>) {
                adapter.changeCursor(null)
            }
        })
        val touchHelperCallback = ConversationTouchHelperCallback(adapter, this) { reply(it) }
        val touchHelper = ItemTouchHelper(touchHelperCallback)
        touchHelper.attachToRecyclerView(conversationRecyclerView)
    }

    private fun setUpToolbar() {
        val actionBar = supportActionBar!!
        actionBar.setCustomView(R.layout.activity_conversation_v2_action_bar)
        actionBar.setDisplayShowCustomEnabled(true)
        conversationTitleView.text = thread.toShortString()
        profilePictureView.glide = glide
        profilePictureView.update(thread, threadID)
    }
    // endregion

    // region Interaction
    private fun showConversationSettings() {
        // TODO: Implement
    }

    private fun reply(messagePosition: Int) {
        Log.d("Loki", "Reply to message at position: $messagePosition.")
    }
    // endregion
}