package com.example.livestreaming;

import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

import androidx.annotation.NonNull;
import androidx.recyclerview.widget.DiffUtil;
import androidx.recyclerview.widget.ListAdapter;
import androidx.recyclerview.widget.RecyclerView;

import com.example.livestreaming.databinding.ItemConversationBinding;

public class ConversationsAdapter extends ListAdapter<ConversationItem, ConversationsAdapter.VH> {

    public interface OnConversationClickListener {
        void onConversationClick(ConversationItem item);
    }

    private final OnConversationClickListener onConversationClickListener;

    public ConversationsAdapter(OnConversationClickListener onConversationClickListener) {
        super(DIFF);
        this.onConversationClickListener = onConversationClickListener;
    }

    @NonNull
    @Override
    public VH onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        ItemConversationBinding binding = ItemConversationBinding.inflate(LayoutInflater.from(parent.getContext()), parent, false);
        return new VH(binding, onConversationClickListener);
    }

    @Override
    public void onBindViewHolder(@NonNull VH holder, int position) {
        holder.bind(getItem(position));
    }

    static class VH extends RecyclerView.ViewHolder {

        private final ItemConversationBinding binding;
        private final OnConversationClickListener onConversationClickListener;

        VH(ItemConversationBinding binding, OnConversationClickListener onConversationClickListener) {
            super(binding.getRoot());
            this.binding = binding;
            this.onConversationClickListener = onConversationClickListener;
        }

        void bind(ConversationItem item) {
            binding.title.setText(item != null && item.getTitle() != null ? item.getTitle() : "");
            binding.lastMessage.setText(item != null && item.getLastMessage() != null ? item.getLastMessage() : "");
            binding.timeText.setText(item != null && item.getTimeText() != null ? item.getTimeText() : "");

            int unread = item != null ? item.getUnreadCount() : 0;
            if (unread > 0) {
                binding.unreadBadge.setVisibility(View.VISIBLE);
                binding.unreadBadge.setText(unread > 99 ? "99+" : String.valueOf(unread));
            } else {
                binding.unreadBadge.setVisibility(View.GONE);
            }

            if (item != null && item.isMuted()) {
                binding.muteIcon.setVisibility(View.VISIBLE);
            } else {
                binding.muteIcon.setVisibility(View.GONE);
            }

            binding.getRoot().setOnClickListener(v -> {
                if (item == null) return;
                if (onConversationClickListener != null) onConversationClickListener.onConversationClick(item);
            });
        }
    }

    private static final DiffUtil.ItemCallback<ConversationItem> DIFF = new DiffUtil.ItemCallback<ConversationItem>() {
        @Override
        public boolean areItemsTheSame(@NonNull ConversationItem oldItem, @NonNull ConversationItem newItem) {
            String o = oldItem.getId();
            String n = newItem.getId();
            return o != null && o.equals(n);
        }

        @Override
        public boolean areContentsTheSame(@NonNull ConversationItem oldItem, @NonNull ConversationItem newItem) {
            return oldItem.equals(newItem);
        }
    };
}