package com.simplemobiletools.smsmessenger.adapters

import android.graphics.Typeface
import android.os.Parcelable
import android.util.TypedValue
import android.view.View
import android.view.ViewGroup
import android.widget.TextView
import androidx.recyclerview.widget.DiffUtil
import androidx.recyclerview.widget.RecyclerView
import com.bumptech.glide.Glide
import com.qtalk.recyclerviewfastscroller.RecyclerViewFastScroller
import com.simplemobiletools.commons.adapters.MyRecyclerViewListAdapter
import com.simplemobiletools.commons.extensions.*
import com.simplemobiletools.commons.helpers.SimpleContactsHelper
import com.simplemobiletools.commons.helpers.ensureBackgroundThread
import com.simplemobiletools.commons.views.MyRecyclerView
import com.simplemobiletools.smsmessenger.R
import com.simplemobiletools.smsmessenger.activities.SimpleActivity
import com.simplemobiletools.smsmessenger.extensions.*
import com.simplemobiletools.smsmessenger.models.Conversation
import kotlinx.android.synthetic.main.item_conversation.view.*

@Suppress("LeakingThis")
abstract class BaseConversationsAdapter(
    activity: SimpleActivity, recyclerView: MyRecyclerView, onRefresh: () -> Unit, itemClick: (Any) -> Unit
) : MyRecyclerViewListAdapter<Conversation>(activity, recyclerView, ConversationDiffCallback(), itemClick, onRefresh),
    RecyclerViewFastScroller.OnPopupTextUpdate {
    private var fontSize = activity.getTextSize()
    private var drafts = HashMap<Long, String?>()

    private var recyclerViewState: Parcelable? = null

    init {
        setupDragListener(true)
        ensureBackgroundThread {
            fetchDrafts(drafts)
        }
        setHasStableIds(true)

        registerAdapterDataObserver(object : RecyclerView.AdapterDataObserver() {
            override fun onChanged() = restoreRecyclerViewState()
            override fun onItemRangeMoved(fromPosition: Int, toPosition: Int, itemCount: Int) = restoreRecyclerViewState()
            override fun onItemRangeInserted(positionStart: Int, itemCount: Int) = restoreRecyclerViewState()
        })
    }

    fun updateFontSize() {
        fontSize = activity.getTextSize()
        notifyDataSetChanged()
    }

    fun updateConversations(newConversations: ArrayList<Conversation>, commitCallback: (() -> Unit)? = null) {
        saveRecyclerViewState()
        submitList(newConversations.toList(), commitCallback)
    }

    fun updateDrafts() {
        ensureBackgroundThread {
            val newDrafts = HashMap<Long, String?>()
            fetchDrafts(newDrafts)
            if (drafts.hashCode() != newDrafts.hashCode()) {
                drafts = newDrafts
                activity.runOnUiThread {
                    notifyDataSetChanged()
                }
            }
        }
    }

    override fun getSelectableItemCount() = itemCount

    protected fun getSelectedItems() = currentList.filter { selectedKeys.contains(it.hashCode()) } as ArrayList<Conversation>

    override fun getIsItemSelectable(position: Int) = true

    override fun getItemSelectionKey(position: Int) = currentList.getOrNull(position)?.hashCode()

    override fun getItemKeyPosition(key: Int) = currentList.indexOfFirst { it.hashCode() == key }

    override fun onActionModeCreated() {}

    override fun onActionModeDestroyed() {}

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int) = createViewHolder(R.layout.item_conversation, parent)

    override fun onBindViewHolder(holder: ViewHolder, position: Int) {
        val conversation = getItem(position)
        holder.bindView(conversation, allowSingleClick = true, allowLongClick = true) { itemView, _ ->
            setupView(itemView, conversation)
        }
        bindViewHolder(holder)
    }

    override fun getItemId(position: Int) = getItem(position).threadId

    override fun onViewRecycled(holder: ViewHolder) {
        super.onViewRecycled(holder)
        if (!activity.isDestroyed && !activity.isFinishing) {
            Glide.with(activity).clear(holder.itemView.conversation_image)
        }
    }

    private fun fetchDrafts(drafts: HashMap<Long, String?>) {
        drafts.clear()
        for ((threadId, draft) in activity.getAllDrafts()) {
            drafts[threadId] = draft
        }
    }

    private fun setupView(view: View, conversation: Conversation) {
        view.apply {
            setupViewBackground(activity)
            val smsDraft = drafts[conversation.threadId]
            draft_indicator.beVisibleIf(smsDraft != null)
            draft_indicator.setTextColor(properPrimaryColor)

            pin_indicator.beVisibleIf(activity.config.pinnedConversations.contains(conversation.threadId.toString()))
            pin_indicator.applyColorFilter(textColor)

            conversation_frame.isSelected = selectedKeys.contains(conversation.hashCode())

            conversation_address.apply {
                text = conversation.title
                setTextSize(TypedValue.COMPLEX_UNIT_PX, fontSize * 1.2f)
            }

            conversation_body_short.apply {
                text = smsDraft ?: conversation.snippet
                setTextSize(TypedValue.COMPLEX_UNIT_PX, fontSize * 0.9f)
            }

            conversation_date.apply {
                text = conversation.date.formatDateOrTime(context, true, false)
                setTextSize(TypedValue.COMPLEX_UNIT_PX, fontSize * 0.8f)
            }

            val style = if (conversation.read) {
                conversation_body_short.alpha = 0.7f
                if (conversation.isScheduled) Typeface.ITALIC else Typeface.NORMAL
            } else {
                conversation_body_short.alpha = 1f
                if (conversation.isScheduled) Typeface.BOLD_ITALIC else Typeface.BOLD

            }
            conversation_address.setTypeface(null, style)
            conversation_body_short.setTypeface(null, style)

            arrayListOf<TextView>(conversation_address, conversation_body_short, conversation_date).forEach {
                it.setTextColor(textColor)
            }

            // at group conversations we use an icon as the placeholder, not any letter
            val placeholder = if (conversation.isGroupConversation) {
                SimpleContactsHelper(context).getColoredGroupIcon(conversation.title)
            } else {
                null
            }

            SimpleContactsHelper(context).loadContactImage(conversation.photoUri, conversation_image, conversation.title, placeholder)
        }
    }

    override fun onChange(position: Int) = currentList.getOrNull(position)?.title ?: ""

    private fun saveRecyclerViewState() {
        recyclerViewState = recyclerView.layoutManager?.onSaveInstanceState()
    }

    private fun restoreRecyclerViewState() {
        recyclerView.layoutManager?.onRestoreInstanceState(recyclerViewState)
    }

    private class ConversationDiffCallback : DiffUtil.ItemCallback<Conversation>() {
        override fun areItemsTheSame(oldItem: Conversation, newItem: Conversation): Boolean {
            return Conversation.areItemsTheSame(oldItem, newItem)
        }

        override fun areContentsTheSame(oldItem: Conversation, newItem: Conversation): Boolean {
            return Conversation.areContentsTheSame(oldItem, newItem)
        }
    }
}