PlayerAndroid/app/src/main/java/code/name/monkey/retromusic/fragments/base/AbsRecyclerViewFragment.kt

/*
 * Copyright (c) 2020 Hemanth Savarla.
 *
 * Licensed under the GNU General Public License v3
 *
 * This is free software: you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details.
 *
 */
package code.name.monkey.retromusic.fragments.base

import android.os.Bundle
import android.view.Menu
import android.view.MenuInflater
import android.view.MenuItem
import android.view.View
import androidx.annotation.NonNull
import androidx.annotation.StringRes
import androidx.core.text.HtmlCompat
import androidx.core.view.doOnPreDraw
import androidx.core.view.updatePadding
import androidx.navigation.fragment.findNavController
import androidx.recyclerview.widget.RecyclerView
import code.name.monkey.appthemehelper.ThemeStore
import code.name.monkey.appthemehelper.common.ATHToolbarActivity
import code.name.monkey.appthemehelper.util.ToolbarContentTintHelper
import code.name.monkey.retromusic.R
import code.name.monkey.retromusic.dialogs.CreatePlaylistDialog
import code.name.monkey.retromusic.dialogs.ImportPlaylistDialog
import code.name.monkey.retromusic.helper.MusicPlayerRemote
import code.name.monkey.retromusic.util.DensityUtil
import code.name.monkey.retromusic.util.ThemedFastScroller.create
import com.google.android.material.appbar.AppBarLayout
import kotlinx.android.synthetic.main.fragment_main_recycler.*
import me.zhanghai.android.fastscroll.FastScroller
import me.zhanghai.android.fastscroll.FastScrollerBuilder

abstract class AbsRecyclerViewFragment<A : RecyclerView.Adapter<*>, LM : RecyclerView.LayoutManager> :
    AbsMainActivityFragment(R.layout.fragment_main_recycler),
    AppBarLayout.OnOffsetChangedListener {

    override fun onActivityCreated(savedInstanceState: Bundle?) {
        super.onActivityCreated(savedInstanceState)
        setHasOptionsMenu(true)
    }

    protected var adapter: A? = null
    protected var layoutManager: LM? = null

    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)
        postponeEnterTransition()
        view.doOnPreDraw { startPostponedEnterTransition() }
        mainActivity.setBottomBarVisibility(View.VISIBLE)
        mainActivity.setSupportActionBar(toolbar)
        mainActivity.supportActionBar?.title = null
        initLayoutManager()
        initAdapter()
        setUpRecyclerView()
        setupTitle()
    }

    private fun setupTitle() {
        toolbar.setNavigationOnClickListener {
            findNavController().navigate(
                R.id.searchFragment,
                null,
                navOptions
            )
        }
        val color = ThemeStore.accentColor(requireContext())
        val hexColor = String.format("#%06X", 0xFFFFFF and color)
        val appName = HtmlCompat.fromHtml(
            "Retro <span  style='color:$hexColor';>Music</span>",
            HtmlCompat.FROM_HTML_MODE_COMPACT
        )
        appNameText.text = appName
    }

    private fun setUpRecyclerView() {
        recyclerView.apply {
            layoutManager = this@AbsRecyclerViewFragment.layoutManager
            adapter = this@AbsRecyclerViewFragment.adapter
            val fastScroller = create(this)

        }
        checkForPadding()
    }

    protected open fun createFastScroller(recyclerView: RecyclerView): FastScroller {
        return FastScrollerBuilder(recyclerView).useMd2Style().build()
    }

    private fun initAdapter() {
        adapter = createAdapter()
        adapter?.registerAdapterDataObserver(object : RecyclerView.AdapterDataObserver() {
            override fun onChanged() {
                super.onChanged()
                checkIsEmpty()
                checkForPadding()
            }
        })
    }

    protected open val emptyMessage: Int
        @StringRes get() = R.string.empty

    private fun getEmojiByUnicode(unicode: Int): String {
        return String(Character.toChars(unicode))
    }

    private fun checkIsEmpty() {
        emptyText.setText(emptyMessage)
        empty.visibility = if (adapter!!.itemCount == 0) View.VISIBLE else View.GONE
    }

    private fun checkForPadding() {
        val itemCount: Int = adapter?.itemCount ?: 0

        if (itemCount > 0 && MusicPlayerRemote.playingQueue.isNotEmpty()) {
            val height = DensityUtil.dip2px(requireContext(), 112f)
            recyclerView.updatePadding(0, 0, 0, height)
        } else {
            val height = DensityUtil.dip2px(requireContext(), 56f)
            recyclerView.updatePadding(0, 0, 0, height)
        }
    }

    private fun initLayoutManager() {
        layoutManager = createLayoutManager()
    }

    protected abstract fun createLayoutManager(): LM

    @NonNull
    protected abstract fun createAdapter(): A

    override fun onOffsetChanged(p0: AppBarLayout?, i: Int) {
        /*recyclerView.setPadding(
            recyclerView.paddingLeft,
            recyclerView.paddingTop,
            recyclerView.paddingRight,
            i
        )*/
    }

    override fun onQueueChanged() {
        super.onQueueChanged()
        checkForPadding()
    }

    override fun onServiceConnected() {
        super.onServiceConnected()
        checkForPadding()
    }

    protected fun invalidateLayoutManager() {
        initLayoutManager()
        recyclerView.layoutManager = layoutManager
    }

    protected fun invalidateAdapter() {
        initAdapter()
        checkIsEmpty()
        recyclerView.adapter = adapter
    }

    fun recyclerView(): RecyclerView {
        return recyclerView
    }

    override fun onPrepareOptionsMenu(menu: Menu) {
        super.onPrepareOptionsMenu(menu)
        ToolbarContentTintHelper.handleOnPrepareOptionsMenu(requireActivity(), toolbar)
    }

    override fun onCreateOptionsMenu(menu: Menu, inflater: MenuInflater) {
        super.onCreateOptionsMenu(menu, inflater)
        inflater.inflate(R.menu.menu_main, menu)
        ToolbarContentTintHelper.handleOnCreateOptionsMenu(
            requireContext(),
            toolbar,
            menu,
            ATHToolbarActivity.getToolbarBackgroundColor(toolbar)
        )
    }

    override fun onOptionsItemSelected(item: MenuItem): Boolean {
        when (item.itemId) {
            R.id.action_settings -> findNavController().navigate(
                R.id.settingsActivity,
                null,
                navOptions
            )
            R.id.action_import_playlist -> ImportPlaylistDialog().show(
                childFragmentManager,
                "ImportPlaylist"
            )
            R.id.action_add_to_playlist -> CreatePlaylistDialog.create(emptyList()).show(
                childFragmentManager,
                "ShowCreatePlaylistDialog"
            )
        }
        return super.onOptionsItemSelected(item)
    }
}