package com.futbollibre.tv

import android.content.Context
import android.graphics.drawable.Drawable
import android.view.ViewGroup
import androidx.core.content.ContextCompat
import androidx.leanback.widget.ImageCardView
import androidx.leanback.widget.Presenter
import coil.imageLoader
import coil.request.ImageRequest
import com.futbollibre.tv.model.Channel

/**
 * Presenter for displaying agenda items as cards in the Leanback UI.
 */
class ChannelCardPresenter(
    private val context: Context,
    private val cardWidth: Int = 300,
    private val cardHeight: Int = 200
) : Presenter() {

    companion object {
        private const val TAG = "ChannelCardPresenter"
    }

    private var defaultCardImage: Drawable? = null
    private var selectedBackgroundColor: Int = 0
    private var defaultBackgroundColor: Int = 0

    init {
        initColors()
    }

    private fun initColors() {
        defaultBackgroundColor = ContextCompat.getColor(context, R.color.card_background)
        selectedBackgroundColor = ContextCompat.getColor(context, R.color.card_selected_background)
        defaultCardImage = ContextCompat.getDrawable(context, R.drawable.ic_channel_default)
    }

    override fun onCreateViewHolder(parent: ViewGroup): ViewHolder {
        val cardView = ImageCardView(context).apply {
            cardType = ImageCardView.CARD_TYPE_INFO_UNDER
            isFocusable = true
            isFocusableInTouchMode = true
            setMainImageDimensions(cardWidth, cardHeight)

            // Set background colors
            setBackgroundColor(defaultBackgroundColor)
        }

        return ViewHolder(cardView)
    }

    override fun onBindViewHolder(viewHolder: ViewHolder, item: Any) {
        val channel = item as Channel
        val cardView = viewHolder.view as ImageCardView

        cardView.titleText = channel.name

        val contentText = channel.summary ?: if (channel.streamUrls.isNotEmpty()) {
            "${channel.streamUrls.size} opciones"
        } else {
            "Sin opciones"
        }
        cardView.contentText = contentText

        cardView.setBackgroundColor(defaultBackgroundColor)

        if (!channel.logoUrl.isNullOrEmpty()) {
            loadChannelLogo(cardView, channel.logoUrl)
        } else {
            cardView.mainImage = defaultCardImage
        }
    }

    override fun onUnbindViewHolder(viewHolder: ViewHolder) {
        val cardView = viewHolder.view as ImageCardView
        cardView.badgeImage = null
        cardView.mainImage = null
    }

    override fun onViewAttachedToWindow(viewHolder: ViewHolder) {
        super.onViewAttachedToWindow(viewHolder)
    }

    private fun loadChannelLogo(cardView: ImageCardView, logoUrl: String) {
        cardView.mainImage = defaultCardImage
        loadImageAsync(cardView, logoUrl)
    }

    private fun loadImageAsync(cardView: ImageCardView, url: String) {
        val imageLoader = context.imageLoader
        val request = ImageRequest.Builder(context)
            .data(url)
            .target(
                onStart = {
                    cardView.mainImage = defaultCardImage
                },
                onSuccess = { drawable ->
                    cardView.mainImage = drawable
                },
                onError = {
                    cardView.mainImage = defaultCardImage
                }
            )
            .build()

        imageLoader.enqueue(request)
    }

    fun onItemSelected(viewHolder: ViewHolder) {
        val cardView = viewHolder.view as ImageCardView
        cardView.setBackgroundColor(selectedBackgroundColor)
    }

    fun onItemUnselected(viewHolder: ViewHolder) {
        val cardView = viewHolder.view as ImageCardView
        cardView.setBackgroundColor(defaultBackgroundColor)
    }
}