/*
 * 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.activities.base

import android.content.res.ColorStateList
import android.graphics.Color
import android.os.Bundle
import android.view.View
import android.view.ViewGroup
import android.view.ViewTreeObserver
import android.widget.FrameLayout
import androidx.core.animation.doOnEnd
import androidx.core.view.ViewCompat
import androidx.core.view.WindowInsetsCompat
import androidx.core.view.isVisible
import androidx.fragment.app.Fragment
import androidx.fragment.app.commit
import code.name.monkey.appthemehelper.util.ATHUtil
import code.name.monkey.appthemehelper.util.ColorUtil
import code.name.monkey.retromusic.R
import code.name.monkey.retromusic.RetroBottomSheetBehavior
import code.name.monkey.retromusic.databinding.SlidingMusicPanelLayoutBinding
import code.name.monkey.retromusic.extensions.*
import code.name.monkey.retromusic.fragments.LibraryViewModel
import code.name.monkey.retromusic.fragments.NowPlayingScreen
import code.name.monkey.retromusic.fragments.NowPlayingScreen.*
import code.name.monkey.retromusic.fragments.base.AbsPlayerFragment
import code.name.monkey.retromusic.fragments.other.MiniPlayerFragment
import code.name.monkey.retromusic.fragments.player.adaptive.AdaptiveFragment
import code.name.monkey.retromusic.fragments.player.blur.BlurPlayerFragment
import code.name.monkey.retromusic.fragments.player.card.CardFragment
import code.name.monkey.retromusic.fragments.player.cardblur.CardBlurFragment
import code.name.monkey.retromusic.fragments.player.circle.CirclePlayerFragment
import code.name.monkey.retromusic.fragments.player.classic.ClassicPlayerFragment
import code.name.monkey.retromusic.fragments.player.color.ColorFragment
import code.name.monkey.retromusic.fragments.player.fit.FitFragment
import code.name.monkey.retromusic.fragments.player.flat.FlatPlayerFragment
import code.name.monkey.retromusic.fragments.player.full.FullPlayerFragment
import code.name.monkey.retromusic.fragments.player.gradient.GradientPlayerFragment
import code.name.monkey.retromusic.fragments.player.material.MaterialFragment
import code.name.monkey.retromusic.fragments.player.normal.PlayerFragment
import code.name.monkey.retromusic.fragments.player.peak.PeakPlayerFragment
import code.name.monkey.retromusic.fragments.player.plain.PlainPlayerFragment
import code.name.monkey.retromusic.fragments.player.simple.SimplePlayerFragment
import code.name.monkey.retromusic.fragments.player.tiny.TinyPlayerFragment
import code.name.monkey.retromusic.fragments.queue.PlayingQueueFragment
import code.name.monkey.retromusic.helper.MusicPlayerRemote
import code.name.monkey.retromusic.model.CategoryInfo
import code.name.monkey.retromusic.util.PreferenceUtil
import code.name.monkey.retromusic.util.RetroUtil
import com.google.android.material.bottomsheet.BottomSheetBehavior.*
import org.koin.androidx.viewmodel.ext.android.viewModel

abstract class AbsSlidingMusicPanelActivity : AbsMusicServiceActivity() {
    companion object {
        val TAG: String = AbsSlidingMusicPanelActivity::class.java.simpleName
    }

    private var windowInsets: WindowInsetsCompat? = null
    protected val libraryViewModel by viewModel<LibraryViewModel>()
    private lateinit var bottomSheetBehavior: RetroBottomSheetBehavior<FrameLayout>
    private var playerFragment: AbsPlayerFragment? = null
    private var miniPlayerFragment: MiniPlayerFragment? = null
    private var nowPlayingScreen: NowPlayingScreen? = null
    private var taskColor: Int = 0
    private var paletteColor: Int = Color.WHITE
    protected abstract fun createContentView(): SlidingMusicPanelLayoutBinding
    private val panelState: Int
        get() = bottomSheetBehavior.state
    private lateinit var binding: SlidingMusicPanelLayoutBinding
    private val bottomSheetCallbackList = object : BottomSheetCallback() {

        override fun onSlide(bottomSheet: View, slideOffset: Float) {
            setMiniPlayerAlphaProgress(slideOffset)
        }

        override fun onStateChanged(bottomSheet: View, newState: Int) {
            when (newState) {
                STATE_EXPANDED -> {
                    onPanelExpanded()
                }
                STATE_COLLAPSED -> {
                    onPanelCollapsed()
                }
                else -> {
                    println("Do something")
                }
            }
        }
    }

    fun getBottomSheetBehavior() = bottomSheetBehavior

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        binding = createContentView()
        setContentView(binding.root)
        ViewCompat.setOnApplyWindowInsetsListener(
            binding.root
        ) { _, insets ->
            windowInsets = insets
            insets
        }
        bottomNavigationView.drawAboveSystemBarsWithPadding()
        if (RetroUtil.isLandscape()) {
            binding.slidingPanel.drawAboveSystemBarsWithPadding(true)
        }
        chooseFragmentForTheme()
        setupSlidingUpPanel()
        setupBottomSheet()
        updateColor()
        binding.slidingPanel.backgroundTintList = ColorStateList.valueOf(darkAccentColor())
        bottomNavigationView.backgroundTintList = ColorStateList.valueOf(darkAccentColor())
    }

    private fun setupBottomSheet() {
        bottomSheetBehavior = from(binding.slidingPanel) as RetroBottomSheetBehavior
        bottomSheetBehavior.addBottomSheetCallback(bottomSheetCallbackList)
        bottomSheetBehavior.isHideable = false
        setMiniPlayerAlphaProgress(0F)
    }

    override fun onResume() {
        super.onResume()
        if (nowPlayingScreen != PreferenceUtil.nowPlayingScreen) {
            postRecreate()
        }
        if (bottomSheetBehavior.state == STATE_EXPANDED) {
            setMiniPlayerAlphaProgress(1f)
        }
    }

    override fun onDestroy() {
        super.onDestroy()
        bottomSheetBehavior.removeBottomSheetCallback(bottomSheetCallbackList)
    }

    protected fun wrapSlidingMusicPanel(): SlidingMusicPanelLayoutBinding {
        return SlidingMusicPanelLayoutBinding.inflate(layoutInflater)
    }

    fun collapsePanel() {
        bottomSheetBehavior.state = STATE_COLLAPSED
    }

    fun expandPanel() {
        bottomSheetBehavior.state = STATE_EXPANDED
    }

    private fun setMiniPlayerAlphaProgress(progress: Float) {
        if (progress < 0) return
        val alpha = 1 - progress
        miniPlayerFragment?.view?.alpha = 1 - (progress / 0.2F)
        miniPlayerFragment?.view?.visibility = if (alpha == 0f) View.GONE else View.VISIBLE
        binding.bottomNavigationView.translationY = progress * 500
        binding.bottomNavigationView.alpha = alpha
        binding.playerFragmentContainer.alpha = (progress - 0.2F) / 0.2F
    }

    open fun onPanelCollapsed() {
        setMiniPlayerAlphaProgress(0F)
        // restore values
        setLightStatusBarAuto(surfaceColor())
        setLightNavigationAuto()
        setTaskDescriptionColor(taskColor)
    }

    open fun onPanelExpanded() {
        setMiniPlayerAlphaProgress(1F)
        onPaletteColorChanged()
    }

    private fun setupSlidingUpPanel() {
        binding.slidingPanel.viewTreeObserver.addOnGlobalLayoutListener(object :
            ViewTreeObserver.OnGlobalLayoutListener {
            override fun onGlobalLayout() {
                binding.slidingPanel.viewTreeObserver.removeOnGlobalLayoutListener(this)
                if (nowPlayingScreen != Peak) {
                    val params = binding.slidingPanel.layoutParams as ViewGroup.LayoutParams
                    params.height = ViewGroup.LayoutParams.MATCH_PARENT
                    binding.slidingPanel.layoutParams = params
                }
                when (panelState) {
                    STATE_EXPANDED -> onPanelExpanded()
                    STATE_COLLAPSED -> onPanelCollapsed()
                    else -> {
                        // playerFragment!!.onHide()
                    }
                }
            }
        })
    }

    val bottomNavigationView get() = binding.bottomNavigationView

    override fun onServiceConnected() {
        super.onServiceConnected()
        if (MusicPlayerRemote.playingQueue.isNotEmpty()) {
            binding.slidingPanel.viewTreeObserver.addOnGlobalLayoutListener(object :
                ViewTreeObserver.OnGlobalLayoutListener {
                override fun onGlobalLayout() {
                    binding.slidingPanel.viewTreeObserver.removeOnGlobalLayoutListener(this)
                    hideBottomSheet(false)
                }
            })
        } // don't call hideBottomSheet(true) here as it causes a bug with the SlidingUpPanelLayout
    }

    override fun onQueueChanged() {
        super.onQueueChanged()
        // Mini player should be hidden in Playing Queue
        // it may pop up if hideBottomSheet is called
        if (currentFragment(R.id.fragment_container) !is PlayingQueueFragment &&
            bottomSheetBehavior.state != STATE_EXPANDED
        ) {
            hideBottomSheet(MusicPlayerRemote.playingQueue.isEmpty())
        }
    }

    override fun onBackPressed() {
        if (!handleBackPress()) super.onBackPressed()
    }

    private fun handleBackPress(): Boolean {
        if (bottomSheetBehavior.peekHeight != 0 && playerFragment!!.onBackPressed()) return true
        if (panelState == STATE_EXPANDED) {
            collapsePanel()
            return true
        }

        return false
    }

    private fun onPaletteColorChanged() {
        if (panelState == STATE_EXPANDED) {
            setTaskDescColor(paletteColor)
            val isColorLight = ColorUtil.isColorLight(paletteColor)
            if (PreferenceUtil.isAdaptiveColor && (nowPlayingScreen == Normal || nowPlayingScreen == Flat)) {
                setLightNavigationBar(true)
                setLightStatusBar(isColorLight)
            } else if (nowPlayingScreen == Card || nowPlayingScreen == Blur || nowPlayingScreen == BlurCard) {
                setLightStatusBar(false)
                setLightNavigationBar(true)
            } else if (nowPlayingScreen == Color || nowPlayingScreen == Tiny || nowPlayingScreen == Gradient) {
                setLightNavigationBar(isColorLight)
                setLightStatusBar(isColorLight)
            } else if (nowPlayingScreen == Full) {
                setLightNavigationBar(isColorLight)
                setLightStatusBar(false)
            } else if (nowPlayingScreen == Classic) {
                setLightStatusBar(false)
            } else if (nowPlayingScreen == Fit) {
                setLightStatusBar(false)
            } else {
                setLightStatusBar(
                    ColorUtil.isColorLight(
                        ATHUtil.resolveColor(
                            this,
                            android.R.attr.windowBackground
                        )
                    )
                )
                setLightNavigationBar(true)
            }
        }
    }

    private fun setTaskDescColor(color: Int) {
        taskColor = color
        if (panelState == STATE_COLLAPSED) {
            setTaskDescriptionColor(color)
        }
    }

    fun updateTabs() {
        binding.bottomNavigationView.menu.clear()
        val currentTabs: List<CategoryInfo> = PreferenceUtil.libraryCategory
        for (tab in currentTabs) {
            if (tab.visible) {
                val menu = tab.category
                binding.bottomNavigationView.menu.add(0, menu.id, 0, menu.stringRes)
                    .setIcon(menu.icon)
            }
        }
        if (binding.bottomNavigationView.menu.size() == 1) {
            binding.bottomNavigationView.hide()
        }
    }

    private fun updateColor() {
        libraryViewModel.paletteColor.observe(this, { color ->
            this.paletteColor = color
            onPaletteColorChanged()
        })
    }

    fun setBottomNavVisibility(visible: Boolean, animate: Boolean = false) {
        binding.bottomNavigationView.translateYAnimate(if (visible) 0F else dip(R.dimen.bottom_nav_height).toFloat() + windowInsets.safeGetBottomInsets())
            .apply {
                doOnEnd {
                    binding.bottomNavigationView.bringToFront()
                }
                hideBottomSheet(
                    hide = MusicPlayerRemote.playingQueue.isEmpty(),
                    animate = animate,
                    isBottomNavVisible = visible
                )
            }
    }

    fun hideBottomSheet(
        hide: Boolean,
        animate: Boolean = false,
        isBottomNavVisible: Boolean = bottomNavigationView.isVisible
    ) {
        val heightOfBar =
            windowInsets.safeGetBottomInsets() +
                    if (MusicPlayerRemote.isCasting) dip(R.dimen.cast_mini_player_height) else dip(R.dimen.mini_player_height)
        val heightOfBarWithTabs = heightOfBar + dip(R.dimen.bottom_nav_height)
        if (hide) {
            bottomSheetBehavior.peekHeight = -windowInsets.safeGetBottomInsets()
            bottomSheetBehavior.state = STATE_COLLAPSED
            libraryViewModel.setFabMargin(if (isBottomNavVisible) dip(R.dimen.bottom_nav_height) else 0)
            ViewCompat.setElevation(binding.slidingPanel, 0f)
            ViewCompat.setElevation(binding.bottomNavigationView, 10f)
        } else {
            if (MusicPlayerRemote.playingQueue.isNotEmpty()) {
                ViewCompat.setElevation(binding.slidingPanel, 10f)
                ViewCompat.setElevation(binding.bottomNavigationView, 10f)
                if (isBottomNavVisible) {
                    println("List")
                    if (animate) {
                        bottomSheetBehavior.peekHeightAnimate(heightOfBarWithTabs)
                    } else {
                        bottomSheetBehavior.peekHeight = heightOfBarWithTabs
                    }
                    binding.bottomNavigationView.bringToFront()
                    libraryViewModel.setFabMargin(dip(R.dimen.mini_player_height_expanded))
                } else {
                    println("Details")
                    if (animate) {
                        bottomSheetBehavior.peekHeightAnimate(heightOfBar).doOnEnd {
                            binding.slidingPanel.bringToFront()
                        }
                    } else {
                        bottomSheetBehavior.peekHeight = heightOfBar
                        binding.slidingPanel.bringToFront()
                    }
                    libraryViewModel.setFabMargin(dip(R.dimen.mini_player_height))
                }
            }
        }
    }

    fun setAllowDragging(allowDragging: Boolean) {
        bottomSheetBehavior.setAllowDragging(allowDragging)
        hideBottomSheet(false)
    }

    private fun chooseFragmentForTheme() {
        nowPlayingScreen = PreferenceUtil.nowPlayingScreen

        val fragment: Fragment = when (nowPlayingScreen) {
            Blur -> BlurPlayerFragment()
            Adaptive -> AdaptiveFragment()
            Normal -> PlayerFragment()
            Card -> CardFragment()
            BlurCard -> CardBlurFragment()
            Fit -> FitFragment()
            Flat -> FlatPlayerFragment()
            Full -> FullPlayerFragment()
            Plain -> PlainPlayerFragment()
            Simple -> SimplePlayerFragment()
            Material -> MaterialFragment()
            Color -> ColorFragment()
            Gradient -> GradientPlayerFragment()
            Tiny -> TinyPlayerFragment()
            Peak -> PeakPlayerFragment()
            Circle -> CirclePlayerFragment()
            Classic -> ClassicPlayerFragment()
            else -> PlayerFragment()
        } // must implement AbsPlayerFragment
        supportFragmentManager.commit {
            replace(R.id.playerFragmentContainer, fragment)
        }
        supportFragmentManager.executePendingTransactions()
        playerFragment = whichFragment<AbsPlayerFragment>(R.id.playerFragmentContainer)
        miniPlayerFragment = whichFragment<MiniPlayerFragment>(R.id.miniPlayerFragment)
        miniPlayerFragment?.view?.setOnClickListener { expandPanel() }
    }
}