package com.simplemobiletools.smsmessenger.adapters

import android.view.Menu
import android.view.View
import android.view.ViewGroup
import com.bumptech.glide.Glide
import com.bumptech.glide.load.engine.DiskCacheStrategy
import com.bumptech.glide.load.resource.bitmap.FitCenter
import com.bumptech.glide.load.resource.bitmap.RoundedCorners
import com.bumptech.glide.load.resource.drawable.DrawableTransitionOptions
import com.bumptech.glide.request.RequestOptions
import com.simplemobiletools.commons.adapters.MyRecyclerViewAdapter
import com.simplemobiletools.commons.dialogs.ConfirmationDialog
import com.simplemobiletools.commons.extensions.*
import com.simplemobiletools.commons.helpers.ensureBackgroundThread
import com.simplemobiletools.commons.views.FastScroller
import com.simplemobiletools.commons.views.MyRecyclerView
import com.simplemobiletools.smsmessenger.R
import com.simplemobiletools.smsmessenger.activities.SimpleActivity
import com.simplemobiletools.smsmessenger.extensions.deleteMessage
import com.simplemobiletools.smsmessenger.helpers.*
import com.simplemobiletools.smsmessenger.models.Message
import com.simplemobiletools.smsmessenger.models.ThreadDateTime
import com.simplemobiletools.smsmessenger.models.ThreadError
import com.simplemobiletools.smsmessenger.models.ThreadItem
import kotlinx.android.synthetic.main.item_received_message.view.*
import kotlinx.android.synthetic.main.item_thread_date_time.view.*

class ThreadAdapter(
    activity: SimpleActivity, var messages: ArrayList<ThreadItem>,
    recyclerView: MyRecyclerView,
    fastScroller: FastScroller,
    itemClick: (Any) -> Unit
) : MyRecyclerViewAdapter(activity, recyclerView, fastScroller, itemClick) {

    private val roundedCornersRadius = resources.getDimension(R.dimen.normal_margin).toInt()

    init {
        setupDragListener(true)
    }

    override fun getActionMenuId() = R.menu.cab_thread

    override fun prepareActionMode(menu: Menu) {
        val isOneItemSelected = isOneItemSelected()
        menu.apply {
            findItem(R.id.cab_copy_to_clipboard).isVisible = isOneItemSelected
            findItem(R.id.cab_share).isVisible = isOneItemSelected
        }
    }

    override fun actionItemPressed(id: Int) {
        if (selectedKeys.isEmpty()) {
            return
        }

        when (id) {
            R.id.cab_copy_to_clipboard -> copyToClipboard()
            R.id.cab_share -> shareText()
            R.id.cab_select_all -> selectAll()
            R.id.cab_delete -> askConfirmDelete()
        }
    }

    override fun getSelectableItemCount() = messages.filter { it is Message }.size

    override fun getIsItemSelectable(position: Int) = !isThreadDateTime(position)

    override fun getItemSelectionKey(position: Int) = (messages.getOrNull(position) as? Message)?.id

    override fun getItemKeyPosition(key: Int) = messages.indexOfFirst { (it as? Message)?.id == key }

    override fun onActionModeCreated() {}

    override fun onActionModeDestroyed() {}

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
        val layout = when (viewType) {
            THREAD_DATE_TIME -> R.layout.item_thread_date_time
            THREAD_RECEIVED_MESSAGE -> R.layout.item_received_message
            THREAD_SENT_MESSAGE_ERROR -> R.layout.item_thread_error
            else -> R.layout.item_sent_message
        }
        return createViewHolder(layout, parent)
    }

    override fun onBindViewHolder(holder: ViewHolder, position: Int) {
        val item = messages[position]
        holder.bindView(item, true, item is Message) { itemView, layoutPosition ->
            if (item is ThreadDateTime) {
                setupDateTime(itemView, item)
            } else if (item !is ThreadError) {
                setupView(itemView, item as Message)
            }
        }
        bindViewHolder(holder)
    }

    override fun getItemCount() = messages.size

    override fun getItemViewType(position: Int): Int {
        val item = messages[position]
        return when {
            item is ThreadDateTime -> THREAD_DATE_TIME
            (messages[position] as? Message)?.isReceivedMessage() == true -> THREAD_RECEIVED_MESSAGE
            item is ThreadError -> THREAD_SENT_MESSAGE_ERROR
            else -> THREAD_SENT_MESSAGE
        }
    }

    private fun copyToClipboard() {
        val firstItem = getSelectedItems().first() as? Message ?: return
        activity.copyToClipboard(firstItem.body)
    }

    private fun shareText() {
        val firstItem = getSelectedItems().first() as? Message ?: return
        activity.shareTextIntent(firstItem.body)
    }

    private fun askConfirmDelete() {
        val itemsCnt = selectedKeys.size
        val items = resources.getQuantityString(R.plurals.delete_messages, itemsCnt, itemsCnt)

        val baseString = R.string.deletion_confirmation
        val question = String.format(resources.getString(baseString), items)

        ConfirmationDialog(activity, question) {
            ensureBackgroundThread {
                deleteMessages()
            }
        }
    }

    private fun deleteMessages() {
        if (selectedKeys.isEmpty()) {
            return
        }

        val messagesToRemove = messages.filter { selectedKeys.contains((it as? Message)?.id ?: 0) } as ArrayList<ThreadItem>
        val positions = getSelectedItemPositions()
        messagesToRemove.forEach {
            activity.deleteMessage((it as Message).id)
        }
        messages.removeAll(messagesToRemove)

        activity.runOnUiThread {
            if (messages.filter { it is Message }.isEmpty()) {
                activity.finish()
            } else {
                removeSelectedItems(positions)
            }
            refreshMessages()
        }
    }

    private fun getSelectedItems() = messages.filter { selectedKeys.contains((it as? Message)?.id ?: 0) } as ArrayList<ThreadItem>

    private fun isThreadDateTime(position: Int) = messages.getOrNull(position) is ThreadDateTime

    private fun setupView(view: View, message: Message) {
        view.apply {
            thread_message_body.text = message.body

            if (message.isReceivedMessage()) {
                thread_message_body.setTextColor(textColor)
            } else {
                val background = context.getAdjustedPrimaryColor()
                thread_message_body.background.applyColorFilter(background.adjustAlpha(0.8f))
                thread_message_body.setTextColor(background.getContrastColor())
            }

            if (message.attachment != null) {
                if (message.attachment.type.startsWith("image/")) {
                    val options = RequestOptions()
                        .diskCacheStrategy(DiskCacheStrategy.NONE)
                        .transform(FitCenter(), RoundedCorners(roundedCornersRadius))

                    Glide.with(context)
                        .load(message.attachment.uri)
                        .transition(DrawableTransitionOptions.withCrossFade())
                        .apply(options)
                        .into(thread_message_image)
                }
            }
        }
    }

    private fun setupDateTime(view: View, dateTime: ThreadDateTime) {
        view.apply {
            thread_date_time.text = dateTime.date.formatDateOrTime(context, false)
            thread_date_time.setTextColor(textColor)
        }
    }
}