PixelDroid-App-Android/app/src/main/java/org/pixeldroid/app/posts/feeds/uncachedFeeds/comments/CommentFragment.kt

package org.pixeldroid.app.posts.feeds.uncachedFeeds.comments

import android.content.Intent
import android.os.Bundle
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import androidx.lifecycle.ViewModelProvider
import androidx.lifecycle.lifecycleScope
import androidx.paging.ExperimentalPagingApi
import androidx.paging.PagingDataAdapter
import androidx.recyclerview.widget.DiffUtil
import androidx.recyclerview.widget.RecyclerView
import org.pixeldroid.app.R
import org.pixeldroid.app.databinding.CommentBinding
import org.pixeldroid.app.posts.PostActivity
import org.pixeldroid.app.posts.feeds.uncachedFeeds.FeedViewModel
import org.pixeldroid.app.posts.feeds.uncachedFeeds.UncachedFeedFragment
import org.pixeldroid.app.posts.feeds.uncachedFeeds.ViewModelFactory
import org.pixeldroid.app.posts.parseHTMLText
import org.pixeldroid.app.utils.api.objects.Status
import org.pixeldroid.app.utils.setProfileImageFromURL


/**
 * Fragment to show a list of [Status]s, in form of comments
 */
class CommentFragment : UncachedFeedFragment<Status>() {

    private lateinit var id: String
    private lateinit var domain: String

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

        id = arguments?.getSerializable(COMMENT_STATUS_ID) as String
        domain = arguments?.getSerializable(COMMENT_DOMAIN) as String

        adapter = CommentAdapter()
    }

    @OptIn(ExperimentalPagingApi::class)
    override fun onCreateView(
        inflater: LayoutInflater, container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View? {


        val view = super.onCreateView(inflater, container, savedInstanceState)

        // get the view model
        @Suppress("UNCHECKED_CAST")
        viewModel = ViewModelProvider(
            requireActivity(), ViewModelFactory(
                CommentContentRepository(
                    apiHolder.setToCurrentUser(),
                    id
                )
            )
        )["commentFragment", FeedViewModel::class.java] as FeedViewModel<Status>

        launch()
        initSearch()

        return view
    }
    companion object {
        const val COMMENT_STATUS_ID = "PostActivityCommentsId"
        const val COMMENT_DOMAIN = "PostActivityCommentsDomain"
    }


    private val UIMODEL_COMPARATOR = object : DiffUtil.ItemCallback<Status>() {
        override fun areItemsTheSame(oldItem: Status, newItem: Status): Boolean {
            return oldItem.id == newItem.id
        }

        override fun areContentsTheSame(oldItem: Status, newItem: Status): Boolean =
            oldItem.content == newItem.content
    }

    inner class CommentAdapter : PagingDataAdapter<Status, RecyclerView.ViewHolder>(
        UIMODEL_COMPARATOR
    ) {
        fun create(parent: ViewGroup): CommentViewHolder {
            val itemBinding = CommentBinding.inflate(
                LayoutInflater.from(parent.context), parent, false
            )
            return CommentViewHolder(itemBinding)
        }

        override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): RecyclerView.ViewHolder {
            return create(parent)
        }

        override fun onBindViewHolder(holder: RecyclerView.ViewHolder, position: Int) {
            val post = getItem(position)

            post?.let {
                (holder as CommentViewHolder).bind(it)
            }
        }
    }


    inner class CommentViewHolder(val binding: CommentBinding) :
        RecyclerView.ViewHolder(binding.root) {

        fun bind(comment: Status) {

            setProfileImageFromURL(
                binding.profilePic,
                comment.account!!.anyAvatar(),
                binding.profilePic
            )
            binding.user.text = comment.account.username
            binding.commentText.text = parseHTMLText(
                comment.content!!,
                comment.mentions.orEmpty(),
                apiHolder,
                itemView.context,
                lifecycleScope
            )

            binding.postDomain.text =
                comment.getStatusDomain(domain, binding.postDomain.context)

            if (comment.replies_count == 0 || comment.replies_count == null) {
                binding.replies.visibility = View.GONE
            } else {
                binding.replies.visibility = View.VISIBLE
                binding.replies.text = itemView.context.resources.getQuantityString(
                    R.plurals.replies_count,
                    comment.replies_count,
                    comment.replies_count
                )
            }

            binding.comment.setOnClickListener { openComment(comment) }
            binding.profilePic.setOnClickListener { comment.account.openProfile(itemView.context) }
            binding.user.setOnClickListener { comment.account.openProfile(itemView.context) }
        }

        private fun openComment(comment: Status) {
            val intent = Intent(itemView.context, PostActivity::class.java).apply {
                putExtra(Status.POST_TAG, comment)
            }
            itemView.context.startActivity(intent)
        }
    }
}