package org.mian.gitnex.fragments;

import android.content.Context;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import androidx.annotation.NonNull;
import androidx.fragment.app.Fragment;
import org.mian.gitnex.R;
import org.mian.gitnex.adapters.DiffFilesAdapter;
import org.mian.gitnex.clients.RetrofitClient;
import org.mian.gitnex.databinding.FragmentDiffFilesBinding;
import org.mian.gitnex.helpers.AlertDialogs;
import org.mian.gitnex.helpers.FileDiffView;
import org.mian.gitnex.helpers.ParseDiff;
import org.mian.gitnex.helpers.Toasty;
import org.mian.gitnex.helpers.contexts.IssueContext;
import java.io.IOException;
import java.util.List;
import retrofit2.Call;
import retrofit2.Response;

/**
 * @author opyale
 */

public class DiffFilesFragment extends Fragment {

	private FragmentDiffFilesBinding binding;
	private Context ctx;

	public DiffFilesFragment() {}

	public static DiffFilesFragment newInstance() {
		return new DiffFilesFragment();
	}

	@Override
	public View onCreateView(@NonNull LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

		if(binding != null) {
			ctx = requireContext();
			return binding.getRoot();
		}

		binding = FragmentDiffFilesBinding.inflate(inflater, container, false);
		ctx = requireContext();
		IssueContext issue = IssueContext.fromIntent(requireActivity().getIntent());

		binding.progressBar.setVisibility(View.VISIBLE);
		binding.toolbarTitle.setText(R.string.processingText);
		binding.close.setOnClickListener(v -> requireActivity().finish());

		binding.diffFiles.setOnItemClickListener((parent, view, position, id) -> requireActivity().getSupportFragmentManager()
			.beginTransaction()
			.replace(R.id.fragment_container, DiffFragment.newInstance((FileDiffView) parent.getItemAtPosition(position), issue))
			.commit());

		getPullDiffFiles(issue.getRepository().getOwner(), issue.getRepository().getName(), String.valueOf(issue.getIssueIndex()));

		return binding.getRoot();

	}

	private void getPullDiffFiles(String owner, String repo, String pullIndex) {

		Thread thread = new Thread(() -> {

			Call<String> call = RetrofitClient.getApiInterface(ctx).repoDownloadPullDiffOrPatch(owner, repo, Long.valueOf(pullIndex), "diff", null);

			try {

				Response<String> response = call.execute();
				if(response.body() == null) {
					Toasty.error(requireContext(), getString(R.string.genericError));
					requireActivity().finish();
					return;
				}

				switch(response.code()) {

					case 200:
						List<FileDiffView> fileDiffViews = ParseDiff.getFileDiffViewArray(response.body());

						int filesCount = fileDiffViews.size();

						String toolbarTitleText = (filesCount > 1) ?
							getResources().getString(R.string.fileDiffViewHeader, Integer.toString(filesCount)) :
							getResources().getString(R.string.fileDiffViewHeaderSingle, Integer.toString(filesCount));

						DiffFilesAdapter adapter = new DiffFilesAdapter(ctx, fileDiffViews);

						requireActivity().runOnUiThread(() -> {
							binding.progressBar.setVisibility(View.GONE);
							binding.diffFiles.setAdapter(adapter);
							binding.toolbarTitle.setText(toolbarTitleText);
						});
						break;

					case 401:
						requireActivity().runOnUiThread(() -> AlertDialogs.authorizationTokenRevokedDialog(ctx));
						break;

					case 403:
						requireActivity().runOnUiThread(() -> Toasty.error(ctx, ctx.getString(R.string.authorizeError)));
						break;

					case 404:
						requireActivity().runOnUiThread(() -> Toasty.warning(ctx, ctx.getString(R.string.apiNotFound)));
						break;

					default:
						requireActivity().runOnUiThread(() -> Toasty.error(ctx, getString(R.string.genericError)));

				}
			} catch(IOException ignored) {}

		});

		thread.start();

	}

}