package com.lofiradio.ui

import android.os.Bundle
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import android.widget.Toast
import androidx.fragment.app.Fragment
import androidx.fragment.app.viewModels
import coil.load
import com.lofiradio.R
import com.lofiradio.databinding.FragmentPlayerBinding
import com.lofiradio.player.AudioPlayer
import com.lofiradio.util.Preferences

class PlayerFragment : Fragment() {
    private var _binding: FragmentPlayerBinding? = null
    private val binding get() = _binding!!
    private val viewModel: LofiViewModel by viewModels()

    override fun onCreateView(
        inflater: LayoutInflater,
        container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View {
        _binding = FragmentPlayerBinding.inflate(inflater, container, false)
        return binding.root
    }

    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)

        setupControls()
        observeViewModel()
    }

    private fun setupControls() {
        binding.btnPlayPause.setOnClickListener {
            when (viewModel.playerState.value) {
                LofiViewModel.PlayerState.PLAYING -> viewModel.pausePlayback()
                LofiViewModel.PlayerState.PAUSED -> viewModel.resumePlayback()
                LofiViewModel.PlayerState.IDLE -> {
                    val channel = viewModel.currentChannel.value
                    if (channel != null) {
                        viewModel.playChannel(channel)
                    }
                }
                else -> {
                    val channel = viewModel.currentChannel.value
                    if (channel != null) {
                        viewModel.playChannel(channel)
                    }
                }
            }
        }

        binding.btnNext.setOnClickListener {
            viewModel.playNext()
        }

        binding.btnPrevious.setOnClickListener {
            viewModel.playPrevious()
        }

        binding.volumeSlider.setOnSeekBarChangeListener(object : android.widget.SeekBar.OnSeekBarChangeListener {
            override fun onProgressChanged(seekBar: android.widget.SeekBar?, progress: Int, fromUser: Boolean) {
                if (fromUser) {
                    viewModel.setVolume(progress / 100f)
                    binding.volumeValue.text = "$progress%"
                }
            }
            override fun onStartTrackingTouch(seekBar: android.widget.SeekBar?) {}
            override fun onStopTrackingTouch(seekBar: android.widget.SeekBar?) {}
        })

        binding.btnRetry.setOnClickListener {
            viewModel.retry()
        }
    }

    private fun observeViewModel() {
        viewModel.currentChannel.observe(viewLifecycleOwner) { channel ->
            channel?.let {
                binding.playerChannelName.text = it.name
                binding.playerVideoTitle.text = it.description
                val thumbUrl = it.liveThumbnail ?: it.thumbnail
                if (!thumbUrl.isNullOrBlank()) {
                    binding.playerThumbnail.load(thumbUrl) {
                        crossfade(true)
                    }
                }
                binding.playerMode.text = when (viewModel.getStreamingMode()) {
                    Preferences.StreamingMode.SERVER -> "Server Mode"
                    Preferences.StreamingMode.DIRECT -> "Direct Mode"
                }
            } ?: run {
                binding.playerChannelName.text = "No Channel Selected"
                binding.playerVideoTitle.text = ""
                binding.playerMode.text = ""
            }
        }

        viewModel.playerState.observe(viewLifecycleOwner) { state ->
            updatePlayerUi(state)
        }

        viewModel.isLoading.observe(viewLifecycleOwner) { loading ->
            if (loading) {
                binding.playerState.text = "Loading stream..."
                binding.playerProgress.isIndeterminate = true
            } else {
                binding.playerProgress.isIndeterminate = false
            }
        }

        viewModel.error.observe(viewLifecycleOwner) { error ->
            if (error != null) {
                binding.errorContainer.visibility = View.VISIBLE
                binding.errorMessage.text = error
            } else {
                binding.errorContainer.visibility = View.GONE
            }
        }
    }

    private fun updatePlayerUi(state: LofiViewModel.PlayerState) {
        binding.playerState.text = when (state) {
            LofiViewModel.PlayerState.IDLE -> "No stream playing"
            LofiViewModel.PlayerState.PLAYING -> "Playing"
            LofiViewModel.PlayerState.PAUSED -> "Paused"
            LofiViewModel.PlayerState.BUFFERING -> "Buffering..."
            LofiViewModel.PlayerState.ERROR -> "Error"
            LofiViewModel.PlayerState.ENDED -> "Stream ended"
        }

        binding.btnPlayPause.setImageResource(
            when (state) {
                LofiViewModel.PlayerState.PLAYING -> android.R.drawable.ic_media_pause
                else -> android.R.drawable.ic_btn_now_playing
            }
        )

        binding.playerProgress.visibility = if (state == LofiViewModel.PlayerState.BUFFERING) {
            View.VISIBLE
        } else {
            View.INVISIBLE
        }
    }

    override fun onDestroyView() {
        super.onDestroyView()
        _binding = null
    }
}