PixelDroid-App-Android/mediaEditor/src/main/java/org/pixeldroid/media_editor/photoEdit/FilterListFragment.kt

package org.pixeldroid.media_editor.photoEdit

import android.graphics.Bitmap
import android.os.Bundle
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import androidx.fragment.app.Fragment
import androidx.lifecycle.Lifecycle
import androidx.lifecycle.lifecycleScope
import androidx.lifecycle.repeatOnLifecycle
import androidx.recyclerview.widget.LinearLayoutManager
import com.zomato.photofilters.FilterPack
import com.zomato.photofilters.imageprocessors.Filter
import com.zomato.photofilters.utils.ThumbnailItem
import com.zomato.photofilters.utils.ThumbnailsManager
import kotlinx.coroutines.launch
import org.pixeldroid.media_editor.R
import org.pixeldroid.media_editor.databinding.FragmentFilterListBinding

class FilterListFragment : Fragment() {

    private lateinit var binding: FragmentFilterListBinding

    private var listener : ((Filter) -> Unit)? = null
    internal lateinit var adapter: ThumbnailAdapter
    private lateinit var tbItemList: MutableList<ThumbnailItem>

    override fun onCreateView(
        inflater: LayoutInflater, container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View {
        // Inflate the layout for this fragment
        binding = FragmentFilterListBinding.inflate(inflater, container, false)

        tbItemList = ArrayList()

        binding.recyclerView.layoutManager = LinearLayoutManager(activity, LinearLayoutManager.HORIZONTAL, false)

        adapter = ThumbnailAdapter(requireActivity(), tbItemList, this)
        binding.recyclerView.adapter = adapter

        return binding.root
    }

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

    private fun displayImage() {
        viewLifecycleOwner.lifecycleScope.launch {
            viewLifecycleOwner.lifecycle.repeatOnLifecycle(Lifecycle.State.RESUMED) {
                val tbImage: Bitmap = bitmapFromUri(requireActivity().contentResolver,
                    PhotoEditActivity.imageUri
                )
                setupFilter(tbImage)

                tbItemList.addAll(ThumbnailsManager.processThumbs(context))
                adapter.notifyDataSetChanged()
            }
        }
    }

    private fun setupFilter(tbImage: Bitmap?) {
        ThumbnailsManager.clearThumbs()
        tbItemList.clear()

        val tbItem = ThumbnailItem()
        tbItem.image = tbImage
        tbItem.filter.name = getString(R.string.normal_filter)
        tbItem.filterName = tbItem.filter.name
        ThumbnailsManager.addThumb(tbItem)

        val filters = FilterPack.getFilterPack(context)

        for (filter in filters) {
            val item = ThumbnailItem()
            item.image = tbImage
            item.filter = filter
            item.filterName = filter.name
            ThumbnailsManager.addThumb(item)
        }
    }

    fun resetSelectedFilter(){
        adapter.resetSelected()
    }

    fun onFilterSelected(filter: Filter) {
        listener?.invoke(filter)
    }

    fun setListener(listFragmentListener: (filter: Filter) -> Unit) {
        this.listener = listFragmentListener
    }
}