my-tv/app/src/main/java/com/lizongying/mytv/CardAdapter.kt

package com.lizongying.mytv

import android.util.Log
import android.view.KeyEvent
import android.view.LayoutInflater
import android.view.MotionEvent
import android.view.View
import android.view.ViewConfiguration
import android.view.ViewGroup
import android.view.animation.ScaleAnimation
import androidx.core.view.marginTop
import androidx.core.view.setPadding
import androidx.recyclerview.widget.RecyclerView
import com.bumptech.glide.Glide
import com.lizongying.mytv.databinding.CardBinding
import com.lizongying.mytv.models.TVListViewModel
import com.lizongying.mytv.models.TVViewModel
import kotlin.math.abs


class CardAdapter(
    private val recyclerView: RecyclerView,
    private val mainFragment: MainFragment,
    private var tvListViewModel: TVListViewModel,
) :
    RecyclerView.Adapter<CardAdapter.ViewHolder>() {

    private var listener: ItemListener? = null
    private var focused: View? = null

    var focusable = false

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
        val inflater = LayoutInflater.from(parent.context)
        val binding = CardBinding.inflate(inflater, parent, false)

        val application = mainFragment.requireActivity().applicationContext as MyTVApplication

        binding.card.layoutParams.width = application.px2Px(binding.card.layoutParams.width)
        binding.card.layoutParams.height = application.px2Px(binding.card.layoutParams.height)
        binding.icon.layoutParams.height = application.px2Px(binding.icon.layoutParams.height)
        binding.icon.setPadding(application.px2Px(binding.icon.paddingTop))
        binding.main.layoutParams.height = application.px2Px(binding.main.layoutParams.height)
        binding.main.setPadding(application.px2Px(binding.main.paddingTop))
        binding.title.textSize = application.px2PxFont(binding.title.textSize)
        binding.desc.textSize = application.px2PxFont(binding.desc.textSize)
        val layoutParams = binding.desc.layoutParams as ViewGroup.MarginLayoutParams
        layoutParams.topMargin = application.px2Px(binding.desc.marginTop)
        binding.desc.layoutParams = layoutParams

        val cardView = binding.root
        cardView.isClickable = true
        cardView.isFocusable = true
        cardView.isFocusableInTouchMode = true
        return ViewHolder(cardView, binding)
    }

    fun clear() {
        focused?.clearFocus()
        recyclerView.invalidate()
    }

    private fun startScaleAnimation(view: View) {
        val scaleAnimation = ScaleAnimation(
            0.9f, 1.0f,
            0.9f, 1.0f,
            ScaleAnimation.RELATIVE_TO_SELF, 0.5f,
            ScaleAnimation.RELATIVE_TO_SELF, 0.5f
        )
        scaleAnimation.duration = 200
        scaleAnimation.fillAfter = false
        view.startAnimation(scaleAnimation)
    }

    override fun onBindViewHolder(viewHolder: ViewHolder, position: Int) {
        val item = tvListViewModel.getTVViewModel(position)

        val tvViewModel = item as TVViewModel
        val cardView = viewHolder.view
        cardView.tag = tvViewModel

        val onFocusChangeListener = View.OnFocusChangeListener { view, hasFocus ->
            if (hasFocus) {
                listener?.onItemHasFocus(item)
                focused = cardView

                if (focusable) {
                    startScaleAnimation(cardView)
                    viewHolder.focus(true)
                }
            } else {
                viewHolder.focus(false)
            }
        }

        cardView.onFocusChangeListener = onFocusChangeListener

        cardView.setOnClickListener { _ ->
            listener?.onItemClicked(item)
        }

        var downX = 0f
        var downY = 0f
        val touchSlop = ViewConfiguration.get(cardView.context).scaledTouchSlop

        cardView.setOnTouchListener { _, event ->
            when (event.action) {
                MotionEvent.ACTION_DOWN -> {
                    downX = event.x
                    downY = event.y
                    true
                }

                MotionEvent.ACTION_UP -> {
                    val upX = event.x
                    val upY = event.y
                    val deltaX = abs(upX - downX)
                    val deltaY = abs(upY - downY)
                    if (deltaX < touchSlop && deltaY < touchSlop) {
                        // 如果位移量小于阈值，则执行点击操作
                        cardView.performClick()
                    }
                    true
                }

                else -> false
            }
        }

        cardView.setOnKeyListener { _, keyCode, event: KeyEvent? ->
            if (event?.action == KeyEvent.ACTION_DOWN) {
                return@setOnKeyListener listener?.onKey(keyCode) ?: false
            }
            false
        }

        viewHolder.binding.title.text = tvViewModel.getTV().title

        viewHolder.binding.icon.let {
            Glide.with(viewHolder.view.context)
                .load(tvViewModel.getTV().logo)
                .centerInside()
                .into(it)
        }

        val epg = tvViewModel.epg.value?.filter { it.beginTime < Utils.getDateTimestamp() }
        if (!epg.isNullOrEmpty()) {
            viewHolder.binding.desc.text = epg.last().title
        } else {
            viewHolder.binding.desc.text = ""
        }
    }

    override fun getItemCount() = tvListViewModel.size()

    class ViewHolder(itemView: View, var binding: CardBinding) : RecyclerView.ViewHolder(itemView) {
        val view = itemView

        fun focus(hasFocus: Boolean) {
            if (hasFocus) {
                binding.main.setBackgroundResource(R.drawable.rounded_light_bottom)
            } else {
                binding.main.setBackgroundResource(R.drawable.rounded_dark_bottom)
            }
        }
    }

    fun updateEPG() {
        for (i in 0 until recyclerView.childCount) {
            val childView = recyclerView.getChildAt(i)

            val viewHolder = recyclerView.getChildViewHolder(childView) as ViewHolder

            if (viewHolder.view.tag != null && viewHolder.view.tag is TVViewModel) {
                val tvViewModel = viewHolder.view.tag as TVViewModel

                val epg = tvViewModel.epg.value?.filter { it.beginTime < Utils.getDateTimestamp() }

                if (!epg.isNullOrEmpty()) {
                    val title = epg.last().title
                    if (viewHolder.binding.desc.text != title) {
                        viewHolder.binding.desc.text = title
                        Log.i(TAG, "updateEPG $title")
                    }
                } else {
                    if (viewHolder.binding.desc.text != "") {
                        viewHolder.binding.desc.text = ""
                        Log.i(TAG, "updateEPG")
                    }
                }
            }
        }
    }

    fun toPosition(position: Int) {
        recyclerView.post {
            recyclerView.scrollToPosition(position)
            recyclerView.getChildAt(position)?.isSelected
            recyclerView.getChildAt(position)?.requestFocus()
        }
    }

    interface ItemListener {
        fun onItemHasFocus(tvViewModel: TVViewModel)
        fun onItemClicked(tvViewModel: TVViewModel)
        fun onKey(keyCode: Int): Boolean
    }

    fun setItemListener(listener: ItemListener) {
        this.listener = listener
    }

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