PlayerAndroid/app/src/main/java/code/name/monkey/retromusic/adapter/base/AbsMultiSelectAdapter.kt

package code.name.monkey.retromusic.adapter.base

import android.graphics.Color
import android.view.Menu
import android.view.MenuItem
import androidx.annotation.MenuRes
import androidx.fragment.app.FragmentActivity
import androidx.recyclerview.widget.RecyclerView
import code.name.monkey.retromusic.R
import code.name.monkey.retromusic.extensions.surfaceColor
import code.name.monkey.retromusic.interfaces.ICabHolder
import code.name.monkey.retromusic.util.ColorAnimUtil
import code.name.monkey.retromusic.util.RetroColorUtil
import com.afollestad.materialcab.MaterialCab
import java.util.*

abstract class AbsMultiSelectAdapter<V : RecyclerView.ViewHolder?, I>(
    open val activity: FragmentActivity, private val ICabHolder: ICabHolder?, @MenuRes menuRes: Int
) : RecyclerView.Adapter<V>(), MaterialCab.Callback {
    private var cab: MaterialCab? = null
    private val checked: MutableList<I>
    private var menuRes: Int
    override fun onCabCreated(materialCab: MaterialCab, menu: Menu): Boolean {
        // Animate the color change
        ColorAnimUtil.createColorAnimator(
            activity.surfaceColor(),
            RetroColorUtil.shiftBackgroundColor(activity.surfaceColor())
        ).apply {
            addUpdateListener {
                // Change color of status bar too
                activity.window.statusBarColor = animatedValue as Int
                materialCab.setBackgroundColor(animatedValue as Int)
            }
            start()
        }
        return true
    }

    override fun onCabFinished(materialCab: MaterialCab): Boolean {
        clearChecked()
        activity.window.statusBarColor = Color.TRANSPARENT
        return true
    }

    override fun onCabItemClicked(menuItem: MenuItem): Boolean {
        if (menuItem.itemId == R.id.action_multi_select_adapter_check_all) {
            checkAll()
        } else {
            onMultipleItemAction(menuItem, ArrayList(checked))
            cab?.finish()
            clearChecked()
        }
        return true
    }

    private fun checkAll() {
        if (ICabHolder != null) {
            checked.clear()
            for (i in 0 until itemCount) {
                val identifier = getIdentifier(i)
                if (identifier != null) {
                    checked.add(identifier)
                }
            }
            notifyDataSetChanged()
            updateCab()
        }
    }

    protected abstract fun getIdentifier(position: Int): I?
    protected open fun getName(`object`: I): String? {
        return `object`.toString()
    }

    protected fun isChecked(identifier: I): Boolean {
        return checked.contains(identifier)
    }

    protected val isInQuickSelectMode: Boolean
        get() = cab != null && cab!!.isActive

    protected abstract fun onMultipleItemAction(menuItem: MenuItem, selection: List<I>)
    protected fun setMultiSelectMenuRes(@MenuRes menuRes: Int) {
        this.menuRes = menuRes
    }

    protected fun toggleChecked(position: Int): Boolean {
        if (ICabHolder != null) {
            val identifier = getIdentifier(position) ?: return false
            if (!checked.remove(identifier)) {
                checked.add(identifier)
            }
            notifyItemChanged(position)
            updateCab()
            return true
        }
        return false
    }

    private fun clearChecked() {
        checked.clear()
        notifyDataSetChanged()
    }

    private fun updateCab() {
        if (ICabHolder != null) {
            if (cab == null || !cab!!.isActive) {
                cab = ICabHolder.openCab(menuRes, this)
            }
            val size = checked.size
            when {
                size <= 0 -> {
                    cab?.finish()
                }
                size == 1 -> {
                    cab?.setTitle(getName(checked[0]))
                }
                else -> {
                    cab?.setTitle(activity.getString(R.string.x_selected, size))
                }
            }
        }
    }

    init {
        checked = ArrayList()
        this.menuRes = menuRes
    }
}