package com.lagradost.cloudstream3.ui.download

import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import android.widget.ImageView
import android.widget.TextView
import androidx.cardview.widget.CardView
import androidx.core.widget.ContentLoadingProgressBar
import androidx.recyclerview.widget.RecyclerView
import com.lagradost.cloudstream3.R
import com.lagradost.cloudstream3.utils.AppUtils.getNameFull
import com.lagradost.cloudstream3.utils.DataStoreHelper.fixVisual
import com.lagradost.cloudstream3.utils.DataStoreHelper.getViewPos
import com.lagradost.cloudstream3.utils.VideoDownloadHelper
import kotlinx.android.synthetic.main.download_child_episode.view.*
import java.util.*

const val DOWNLOAD_ACTION_PLAY_FILE = 0
const val DOWNLOAD_ACTION_DELETE_FILE = 1
const val DOWNLOAD_ACTION_RESUME_DOWNLOAD = 2
const val DOWNLOAD_ACTION_PAUSE_DOWNLOAD = 3
const val DOWNLOAD_ACTION_DOWNLOAD = 4
const val DOWNLOAD_ACTION_LONG_CLICK = 5

data class VisualDownloadChildCached(
    val currentBytes: Long,
    val totalBytes: Long,
    val data: VideoDownloadHelper.DownloadEpisodeCached,
)

data class DownloadClickEvent(val action: Int, val data: EasyDownloadButton.IMinimumData)

class DownloadChildAdapter(
    var cardList: List<VisualDownloadChildCached>,
    private val clickCallback: (DownloadClickEvent) -> Unit,
) : RecyclerView.Adapter<RecyclerView.ViewHolder>() {

    private val mBoundViewHolders: HashSet<DownloadButtonViewHolder> = HashSet()
    private fun getAllBoundViewHolders(): Set<DownloadButtonViewHolder?>? {
        return Collections.unmodifiableSet(mBoundViewHolders)
    }

    fun killAdapter() {
        getAllBoundViewHolders()?.forEach { view ->
            view?.downloadButton?.dispose()
        }
    }

    override fun onViewDetachedFromWindow(holder: RecyclerView.ViewHolder) {
        if (holder is DownloadButtonViewHolder) {
            holder.downloadButton.dispose()
        }
    }

    override fun onViewRecycled(holder: RecyclerView.ViewHolder) {
        if (holder is DownloadButtonViewHolder) {
            holder.downloadButton.dispose()
            mBoundViewHolders.remove(holder)
        }
    }

    override fun onViewAttachedToWindow(holder: RecyclerView.ViewHolder) {
        if (holder is DownloadButtonViewHolder) {
            holder.reattachDownloadButton()
        }
    }

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): RecyclerView.ViewHolder {
        return DownloadChildViewHolder(
            LayoutInflater.from(parent.context).inflate(R.layout.download_child_episode, parent, false),
            clickCallback
        )
    }

    override fun onBindViewHolder(holder: RecyclerView.ViewHolder, position: Int) {
        when (holder) {
            is DownloadChildViewHolder -> {
                holder.bind(cardList[position])
                mBoundViewHolders.add(holder)
            }
        }
    }

    override fun getItemCount(): Int {
        return cardList.size
    }

    class DownloadChildViewHolder
    constructor(
        itemView: View,
        private val clickCallback: (DownloadClickEvent) -> Unit,
    ) : RecyclerView.ViewHolder(itemView), DownloadButtonViewHolder {
        override var downloadButton = EasyDownloadButton()

        private val title: TextView = itemView.download_child_episode_text
        private val extraInfo: TextView = itemView.download_child_episode_text_extra
        private val holder: CardView = itemView.download_child_episode_holder
        private val progressBar: ContentLoadingProgressBar = itemView.download_child_episode_progress
        private val progressBarDownload: ContentLoadingProgressBar = itemView.download_child_episode_progress_downloaded
        private val downloadImage: ImageView = itemView.download_child_episode_download

        private var localCard: VisualDownloadChildCached? = null

        fun bind(card: VisualDownloadChildCached) {
            localCard = card
            val d = card.data

            val posDur = getViewPos(d.id)
            if (posDur != null) {
                val visualPos = posDur.fixVisual()
                progressBar.max = (visualPos.duration / 1000).toInt()
                progressBar.progress = (visualPos.position / 1000).toInt()
                progressBar.visibility = View.VISIBLE
            } else {
                progressBar.visibility = View.GONE
            }

            title.text = title.context.getNameFull(d.name, d.episode, d.season)
            title.isSelected = true // is needed for text repeating

            downloadButton.setUpButton(
                card.currentBytes,
                card.totalBytes,
                progressBarDownload,
                downloadImage,
                extraInfo,
                card.data,
                clickCallback
            )

            holder.setOnClickListener {
                clickCallback.invoke(DownloadClickEvent(DOWNLOAD_ACTION_PLAY_FILE, d))
            }
        }

        override fun reattachDownloadButton() {
            downloadButton.dispose()
            val card = localCard
            if (card != null) {
                downloadButton.setUpButton(
                    card.currentBytes,
                    card.totalBytes,
                    progressBarDownload,
                    downloadImage,
                    extraInfo,
                    card.data,
                    clickCallback
                )
            }
        }
    }
}