package melody.offline.music.activity

import android.annotation.SuppressLint
import android.view.View
import androidx.media3.common.MediaItem
import androidx.recyclerview.widget.LinearLayoutManager
import com.gyf.immersionbar.ktx.immersionBar
import kotlinx.coroutines.channels.Channel
import kotlinx.coroutines.isActive
import kotlinx.coroutines.selects.select
import melody.offline.music.App
import melody.offline.music.R
import melody.offline.music.adapter.OfflineSongsAdapter
import melody.offline.music.ads.AdPlacement
import melody.offline.music.ads.LolAdWrapper
import melody.offline.music.bean.OfflineBean
import melody.offline.music.databinding.ActivityOfflineSongsBinding
import melody.offline.music.util.AnalysisUtil
import melody.offline.music.util.LogTag
import org.json.JSONObject

class MoOfflineSongsActivity : MoBaseActivity() {
    private val requests: Channel<Request> = Channel(Channel.UNLIMITED)

    sealed class Request {
        data object TryAgain : Request()
        data object OnFavorites : Request()
        data class OnDownload(val mediaItem: MediaItem) : Request()
        data class UpdateFavorite(val id: String) : Request()
    }

    private lateinit var binding: ActivityOfflineSongsBinding
    private var adapter: OfflineSongsAdapter? = null
    private var offlineList: MutableList<OfflineBean> = mutableListOf()

    override suspend fun main() {
        binding = ActivityOfflineSongsBinding.inflate(layoutInflater)
        setContentView(binding.root)
        LolAdWrapper.shared.showAdTiming(this, AdPlacement.INST_ME_PAGE_LIST)
        initImmersionBar()
        initView()
        initAdapter()
        LolAdWrapper.shared.loadAdIfNotCached(this, AdPlacement.INST_ME_PAGE_LIST)
        initData()
        onReceive()
    }

    private fun initImmersionBar() {
        immersionBar {
            statusBarDarkFont(false)
            statusBarView(binding.view)
        }
    }

    @SuppressLint("NotifyDataSetChanged")
    private suspend fun onReceive() {
        while (isActive) {
            select<Unit> {
                requests.onReceive {
                    when (it) {
                        Request.TryAgain -> {
                            initData()
                        }

                        is Request.OnDownload -> {

                        }

                        Request.OnFavorites -> {
                            if (meController != null && meController.currentMediaItem != null) {
                                val currentMediaItem = meController.currentMediaItem
                                val jsonObject = JSONObject()
                                jsonObject.put(
                                    "song_title", "${currentMediaItem?.mediaMetadata?.title}"
                                )
                                val songMap = mutableMapOf(
                                    Pair(
                                        AnalysisUtil.PARAM_VALUE, jsonObject.toString()
                                    )
                                )
                                val currentFavoriteBean =
                                    App.appFavoriteDBManager.getFavoriteBeanByID(currentMediaItem?.mediaId!!)
                                if (currentFavoriteBean != null) {
                                    currentFavoriteBean.isFavorite = !currentFavoriteBean.isFavorite
                                    App.appFavoriteDBManager.updateFavoriteBean(currentFavoriteBean)
                                    if (currentFavoriteBean.isFavorite) {
                                        AnalysisUtil.logEvent(
                                            AnalysisUtil.PLAYER_B_LOVE_CLICK, songMap
                                        )
                                    } else {
                                        AnalysisUtil.logEvent(
                                            AnalysisUtil.PLAYER_B_UN_LOVE_CLICK, songMap
                                        )
                                    }
                                } else {
                                    insertFavoriteData(currentMediaItem)
                                    AnalysisUtil.logEvent(AnalysisUtil.PLAYER_B_LOVE_CLICK, songMap)
                                }
                                requests.trySend(Request.UpdateFavorite(currentMediaItem.mediaId))
                            }
                        }

                        is Request.UpdateFavorite -> {

                        }
                    }
                }
                events.onReceive {
                    when (it) {
                        Event.ActivityOnResume -> {
                            activityOnResume()
                        }

                        Event.AutomaticallySwitchSongs -> {
                            if (adapter != null) {
                                adapter?.notifyDataSetChanged()
                            }
                        }

                        else -> {}
                    }
                }
            }
        }
    }

    @SuppressLint("NotifyDataSetChanged")
    private fun activityOnResume() {
        addMusicPlayerViewToLayout(binding.playMusicLayout)

        if (adapter != null) {
            adapter?.notifyDataSetChanged()
        }

        LolAdWrapper.shared.loadAdShowNativeAd(
            this,
            AdPlacement.NATIVE_ME_PAGE_LIST,
            binding.frameAd,
            R.layout.ad_layout_admob_banner,
            R.layout.ad_layout_max_banner
        )
    }

    private fun initView() {
        binding.backBtn.setOnClickListener {
            finish()
        }
        binding.tryAgainBtn.setOnClickListener {
            requests.trySend(Request.TryAgain)
        }
    }

    private fun initAdapter() {
        adapter = OfflineSongsAdapter(this, offlineList)
        adapter?.setOnFavoriteClickListener(object : OfflineSongsAdapter.OnFavoriteClickListener {
            override fun onFavoriteClick(position: Int) {
                requests.trySend(Request.OnFavorites)
            }
        })
        binding.rv.layoutManager = LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false)
        binding.rv.adapter = adapter
    }

    @SuppressLint("NotifyDataSetChanged")
    private suspend fun initData() {
        showLoadingUi()

        offlineList.clear()
        val offlineBeans = App.appOfflineDBManager.getAllOfflineBeans()
        // 更新
        offlineBeans.forEach { offlineBean ->
            val favoriteBean = App.appFavoriteDBManager.getFavoriteBeanByID(offlineBean.videoId)
            if (offlineBean.id == favoriteBean?.id) {
                offlineBean.isFavorite = favoriteBean.isFavorite
                App.appOfflineDBManager.updateOfflineBean(offlineBean)
            }
        }
        val filteredBeans = offlineBeans.filter { it.bytesDownloaded?.let { bytes -> bytes > 0 } == true }
        offlineList.addAll(filteredBeans)
        if (offlineList.size > 0) {
            showDataUi()
        } else {
            showNoContentUi()
        }
        if (adapter != null) {
            adapter?.notifyDataSetChanged()
        }

    }

    private fun showDataUi() {
        binding.loadingLayout.visibility = View.GONE
        binding.noContentLayout.visibility = View.GONE
    }

    private fun showLoadingUi() {
        binding.loadingLayout.visibility = View.VISIBLE
        binding.noContentLayout.visibility = View.GONE
    }

    private fun showNoContentUi() {
        binding.loadingLayout.visibility = View.GONE
        binding.noContentLayout.visibility = View.VISIBLE
    }
}