LibreTube/app/src/main/java/com/github/libretube/ChannelFragment.kt

package com.github.libretube

import android.os.Bundle
import android.util.Log
import androidx.fragment.app.Fragment
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import android.widget.ImageView
import android.widget.TextView
import androidx.lifecycle.lifecycleScope
import androidx.recyclerview.widget.GridLayoutManager
import androidx.recyclerview.widget.RecyclerView
import com.github.libretube.adapters.ChannelAdapter
import com.github.libretube.adapters.TrendingAdapter
import com.squareup.picasso.Picasso
import retrofit2.HttpException
import java.io.IOException

// TODO: Rename parameter arguments, choose names that match
// the fragment initialization parameters, e.g. ARG_ITEM_NUMBER

/**
 * A simple [Fragment] subclass.
 * Use the [ChannelFragment.newInstance] factory method to
 * create an instance of this fragment.
 */
class ChannelFragment : Fragment() {
    // TODO: Rename and change types of parameters
    private var channel_id: String? = null
    private val TAG = "ChannelFragment"
    lateinit var recyclerView: RecyclerView

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        arguments?.let {
            channel_id = it.getString("channel_id")
        }
    }

    override fun onCreateView(
        inflater: LayoutInflater, container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View? {
        // Inflate the layout for this fragment
        return inflater.inflate(R.layout.fragment_channel, container, false)
    }

    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)
        channel_id = channel_id!!.replace("/channel/","")
        view.findViewById<TextView>(R.id.channel_name).text=channel_id
        recyclerView = view.findViewById(R.id.channel_recView)
        recyclerView.layoutManager = GridLayoutManager(view.context, 1)
        fetchChannel(view)
    }

    private fun fetchChannel(view: View){
        fun run() {
            lifecycleScope.launchWhenCreated {
                val response = try {
                    RetrofitInstance.api.getChannel(channel_id!!)
                }catch(e: IOException) {
                    println(e)
                    Log.e(TAG, "IOException, you might not have internet connection")
                    return@launchWhenCreated
                } catch (e: HttpException) {
                    Log.e(TAG, "HttpException, unexpected response")
                    return@launchWhenCreated
                }
                runOnUiThread {
                    view.findViewById<TextView>(R.id.channel_name).text=response.name
                    view.findViewById<TextView>(R.id.channel_subs).text=response.subscriberCount.videoViews() + " subscribers"
                    view.findViewById<TextView>(R.id.channel_description).text=response.description
                    val bannerImage = view.findViewById<ImageView>(R.id.channel_banner)
                    val channelImage = view.findViewById<ImageView>(R.id.channel_image)
                    Picasso.get().load(response.bannerUrl).into(bannerImage)
                    Picasso.get().load(response.avatarUrl).into(channelImage)
                    recyclerView.adapter = ChannelAdapter(response.relatedStreams!!)
                }
            }
        }
        run()
    }
    private fun Fragment?.runOnUiThread(action: () -> Unit) {
        this ?: return
        if (!isAdded) return // Fragment not attached to an Activity
        activity?.runOnUiThread(action)
    }
}