package org.mian.gitnex.viewmodels;

import android.content.Context;
import androidx.annotation.NonNull;
import androidx.lifecycle.LiveData;
import androidx.lifecycle.MutableLiveData;
import androidx.lifecycle.ViewModel;
import java.util.List;
import org.gitnex.tea4j.v2.models.TimelineComment;
import org.mian.gitnex.R;
import org.mian.gitnex.adapters.IssueCommentsAdapter;
import org.mian.gitnex.clients.RetrofitClient;
import org.mian.gitnex.helpers.Constants;
import org.mian.gitnex.helpers.Toasty;
import retrofit2.Call;
import retrofit2.Callback;
import retrofit2.Response;

/**
 * @author M M Arif
 */
public class IssueCommentsViewModel extends ViewModel {

	private MutableLiveData<List<TimelineComment>> issueComments;
	private int resultLimit;

	public LiveData<List<TimelineComment>> getIssueCommentList(
			String owner, String repo, int index, Context ctx) {

		issueComments = new MutableLiveData<>();
		resultLimit = Constants.getCurrentResultLimit(ctx);
		loadIssueComments(owner, repo, index, ctx, null);
		return issueComments;
	}

	public void loadIssueComments(
			String owner, String repo, int index, Context ctx, Runnable onLoadingFinished) {

		Call<List<TimelineComment>> call =
				RetrofitClient.getApiInterface(ctx)
						.issueGetCommentsAndTimeline(
								owner, repo, (long) index, null, 1, resultLimit, null);

		call.enqueue(
				new Callback<>() {

					@Override
					public void onResponse(
							@NonNull Call<List<TimelineComment>> call,
							@NonNull Response<List<TimelineComment>> response) {

						if (response.isSuccessful()) {

							if (response.body() != null) {

								issueComments.postValue(response.body());
								if (onLoadingFinished != null) {
									onLoadingFinished.run();
								}
							}
						} else {
							Toasty.error(ctx, ctx.getString(R.string.genericError));
						}
					}

					@Override
					public void onFailure(
							@NonNull Call<List<TimelineComment>> call, @NonNull Throwable t) {

						Toasty.error(ctx, ctx.getString(R.string.genericServerResponseError));
					}
				});
	}

	public void loadMoreIssueComments(
			String owner,
			String repo,
			int index,
			Context ctx,
			int page,
			IssueCommentsAdapter adapter) {

		Call<List<TimelineComment>> call =
				RetrofitClient.getApiInterface(ctx)
						.issueGetCommentsAndTimeline(
								owner, repo, (long) index, null, page, resultLimit, null);

		call.enqueue(
				new Callback<>() {

					@Override
					public void onResponse(
							@NonNull Call<List<TimelineComment>> call,
							@NonNull Response<List<TimelineComment>> response) {

						if (response.isSuccessful()) {

							if (response.body() != null) {

								List<TimelineComment> list = issueComments.getValue();
								assert list != null;
								assert response.body() != null;

								if (!response.body().isEmpty()) {
									list.addAll(response.body());
									adapter.updateList(list);
								} else {
									adapter.setMoreDataAvailable(false);
								}
							} else {
								adapter.setMoreDataAvailable(false);
							}
						} else {
							Toasty.error(ctx, ctx.getString(R.string.genericError));
						}
					}

					@Override
					public void onFailure(
							@NonNull Call<List<TimelineComment>> call, @NonNull Throwable t) {
						Toasty.error(ctx, ctx.getString(R.string.genericServerResponseError));
					}
				});
	}
}