package org.mian.gitnex.activities;

import android.content.Intent;
import android.os.Bundle;
import android.text.method.ScrollingMovementMethod;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import androidx.annotation.NonNull;
import com.google.android.material.dialog.MaterialAlertDialogBuilder;
import com.vdurmont.emoji.EmojiParser;
import java.util.Objects;
import org.gitnex.tea4j.v2.models.CreateWikiPageOptions;
import org.gitnex.tea4j.v2.models.WikiPage;
import org.mian.gitnex.R;
import org.mian.gitnex.clients.RetrofitClient;
import org.mian.gitnex.databinding.ActivityWikiBinding;
import org.mian.gitnex.fragments.BottomSheetWikiFragment;
import org.mian.gitnex.fragments.WikiFragment;
import org.mian.gitnex.helpers.AlertDialogs;
import org.mian.gitnex.helpers.AppUtil;
import org.mian.gitnex.helpers.Markdown;
import org.mian.gitnex.helpers.Toasty;
import org.mian.gitnex.helpers.contexts.RepositoryContext;
import org.mian.gitnex.structs.BottomSheetListener;
import retrofit2.Call;
import retrofit2.Callback;
import retrofit2.Response;

/**
 * @author M M Arif
 */
public class WikiActivity extends BaseActivity implements BottomSheetListener {

	private ActivityWikiBinding binding;
	private String pageName;
	private String action;
	private RepositoryContext repository;
	private boolean renderMd = true;

	@Override
	public void onCreate(Bundle savedInstanceState) {

		super.onCreate(savedInstanceState);

		binding = ActivityWikiBinding.inflate(getLayoutInflater());
		repository = RepositoryContext.fromIntent(getIntent());

		setContentView(binding.getRoot());
		setSupportActionBar(binding.toolbar);

		if (getIntent().getStringExtra("action") != null) {
			action = getIntent().getStringExtra("action");
		} else {
			action = "";
		}
		pageName = getIntent().getStringExtra("pageName");
		binding.close.setOnClickListener(view -> finish());

		binding.toolbarTitle.setMovementMethod(new ScrollingMovementMethod());
		binding.toolbarTitle.setText(pageName);

		if (action.equalsIgnoreCase("edit")) {
			getWikiPageContents();
			binding.renderWiki.setVisibility(View.GONE);
			binding.wikiTitle.setText(pageName);
		} else if (action.equalsIgnoreCase("add")) {
			binding.renderWiki.setVisibility(View.GONE);
			binding.progressBar.setVisibility(View.GONE);
			binding.toolbarTitle.setText(R.string.createWikiPage);
			binding.createWiki.setVisibility(View.VISIBLE);
		} else {
			getWikiPageContents();
			binding.renderWiki.setVisibility(View.VISIBLE);
			binding.createWiki.setVisibility(View.GONE);
		}
	}

	private void processWiki() {

		String wikiTitle =
				binding.wikiTitle.getText() != null ? binding.wikiTitle.getText().toString() : "";
		String wikiContent =
				binding.wikiContent.getText() != null
						? binding.wikiContent.getText().toString()
						: "";

		if (wikiTitle.isEmpty() || wikiContent.isEmpty()) {
			Toasty.error(ctx, getString(R.string.wikiPageNameAndContentError));
			return;
		}

		if (action.equalsIgnoreCase("edit")) {
			patchWiki(wikiTitle, wikiContent);
		} else if (action.equalsIgnoreCase("add")) {
			addWiki(wikiTitle, wikiContent);
		}
	}

	private void addWiki(String wikiTitle, String wikiContent) {

		CreateWikiPageOptions createWikiPageOptions = new CreateWikiPageOptions();
		createWikiPageOptions.setTitle(wikiTitle);
		createWikiPageOptions.setContentBase64(AppUtil.encodeBase64(wikiContent));

		Call<WikiPage> call =
				RetrofitClient.getApiInterface(ctx)
						.repoCreateWikiPage(
								repository.getOwner(), repository.getName(), createWikiPageOptions);

		call.enqueue(
				new Callback<>() {

					@Override
					public void onResponse(
							@NonNull Call<WikiPage> call,
							@NonNull retrofit2.Response<WikiPage> response) {

						if (response.isSuccessful()) {
							if (response.code() == 201) {

								Toasty.success(ctx, getString(R.string.wikiCreated));
								WikiFragment.resumeWiki = true;
								finish();
							} else {

								switch (response.code()) {
									case 401:
										runOnUiThread(
												() ->
														AlertDialogs
																.authorizationTokenRevokedDialog(
																		ctx));
										break;
									case 403:
										runOnUiThread(
												() ->
														Toasty.error(
																ctx,
																ctx.getString(
																		R.string.authorizeError)));
										break;
									case 404:
										runOnUiThread(
												() ->
														Toasty.warning(
																ctx,
																ctx.getString(
																		R.string.apiNotFound)));
										break;
									default:
										runOnUiThread(
												() ->
														Toasty.error(
																ctx,
																getString(R.string.genericError)));
								}
							}
						}
					}

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

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

	private void patchWiki(String wikiTitle, String wikiContent) {

		CreateWikiPageOptions createWikiPageOptions = new CreateWikiPageOptions();
		createWikiPageOptions.setTitle(wikiTitle);
		createWikiPageOptions.setContentBase64(AppUtil.encodeBase64(wikiContent));

		Call<WikiPage> call =
				RetrofitClient.getApiInterface(ctx)
						.repoEditWikiPage(
								repository.getOwner(),
								repository.getName(),
								pageName,
								createWikiPageOptions);

		call.enqueue(
				new Callback<>() {

					@Override
					public void onResponse(
							@NonNull Call<WikiPage> call,
							@NonNull retrofit2.Response<WikiPage> response) {

						if (response.isSuccessful()) {
							if (response.code() == 200) {

								Toasty.success(ctx, getString(R.string.wikiUpdated));
								WikiFragment.resumeWiki = true;
								finish();
							} else {

								switch (response.code()) {
									case 401:
										runOnUiThread(
												() ->
														AlertDialogs
																.authorizationTokenRevokedDialog(
																		ctx));
										break;
									case 403:
										runOnUiThread(
												() ->
														Toasty.error(
																ctx,
																ctx.getString(
																		R.string.authorizeError)));
										break;
									case 404:
										runOnUiThread(
												() ->
														Toasty.warning(
																ctx,
																ctx.getString(
																		R.string.apiNotFound)));
										break;
									default:
										runOnUiThread(
												() ->
														Toasty.error(
																ctx,
																getString(R.string.genericError)));
								}
							}
						}
					}

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

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

	private void getWikiPageContents() {

		Call<WikiPage> call =
				RetrofitClient.getApiInterface(ctx)
						.repoGetWikiPage(repository.getOwner(), repository.getName(), pageName);

		call.enqueue(
				new Callback<>() {

					@Override
					public void onResponse(
							@NonNull Call<WikiPage> call,
							@NonNull retrofit2.Response<WikiPage> response) {

						if (response.isSuccessful()) {
							if (response.code() == 200) {

								WikiPage wikiPage = response.body();

								runOnUiThread(
										() -> {
											assert wikiPage != null;
											String pageContents =
													AppUtil.decodeBase64(
															wikiPage.getContentBase64());
											binding.contents.setContent(pageContents, "md");

											if (renderMd) {
												Markdown.render(
														ctx,
														EmojiParser.parseToUnicode(pageContents),
														binding.markdown,
														repository);

												binding.markdownFrame.setVisibility(View.VISIBLE);
												binding.contents.setVisibility(View.GONE);
											} else {
												binding.markdownFrame.setVisibility(View.GONE);
												binding.contents.setVisibility(View.VISIBLE);
											}

											if (action.equalsIgnoreCase("edit")) {
												binding.wikiContent.setText(pageContents);
											}
										});
							} else {

								switch (response.code()) {
									case 401:
										runOnUiThread(
												() ->
														AlertDialogs
																.authorizationTokenRevokedDialog(
																		ctx));
										break;
									case 403:
										runOnUiThread(
												() ->
														Toasty.error(
																ctx,
																ctx.getString(
																		R.string.authorizeError)));
										break;
									case 404:
										runOnUiThread(
												() ->
														Toasty.warning(
																ctx,
																ctx.getString(
																		R.string.apiNotFound)));
										break;
									default:
										runOnUiThread(
												() ->
														Toasty.error(
																ctx,
																getString(R.string.genericError)));
								}
							}

							binding.progressBar.setVisibility(View.GONE);
						}
					}

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

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

	private void deleteWiki(final String owner, final String repo, final String pageName) {

		MaterialAlertDialogBuilder materialAlertDialogBuilder =
				new MaterialAlertDialogBuilder(ctx)
						.setTitle(
								String.format(ctx.getString(R.string.deleteGenericTitle), pageName))
						.setMessage(ctx.getString(R.string.deleteWikiPageMessage, pageName))
						.setNeutralButton(R.string.cancelButton, null)
						.setPositiveButton(
								R.string.menuDeleteText,
								(dialog, whichButton) ->
										RetrofitClient.getApiInterface(ctx)
												.repoDeleteWikiPage(owner, repo, pageName)
												.enqueue(
														new Callback<>() {

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

																if (response.isSuccessful()) {
																	Toasty.success(
																			ctx,
																			getString(
																					R.string
																							.wikiPageDeleted));
																	WikiFragment.resumeWiki = true;
																	finish();
																} else if (response.code() == 403) {
																	Toasty.error(
																			ctx,
																			ctx.getString(
																					R.string
																							.authorizeError));
																} else {
																	Toasty.error(
																			ctx,
																			ctx.getString(
																					R.string
																							.genericError));
																}
															}

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

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

		materialAlertDialogBuilder.create().show();
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {

		MenuInflater inflater = getMenuInflater();
		inflater.inflate(R.menu.markdown_switcher, menu);
		if (action.equalsIgnoreCase("edit") || action.equalsIgnoreCase("add")) {
			inflater.inflate(R.menu.save, menu);
		} else {
			if (repository.getPermissions().isPush()) {
				inflater.inflate(R.menu.generic_nav_dotted_menu, menu);
			}
		}

		return true;
	}

	@Override
	public void onButtonClicked(String text) {
		switch (text) {
			case "editWiki":
				Intent intent = new Intent(ctx, WikiActivity.class);
				intent.putExtra("pageName", pageName);
				intent.putExtra("action", "edit");
				intent.putExtra(RepositoryContext.INTENT_EXTRA, repository);
				ctx.startActivity(intent);
				finish();
				break;
			case "delWiki":
				deleteWiki(repository.getOwner(), repository.getName(), pageName);
				break;
		}
	}

	@Override
	public boolean onOptionsItemSelected(MenuItem item) {

		int id = item.getItemId();

		if (id == android.R.id.home) {

			finish();
			return true;
		} else if (id == R.id.genericMenu) {

			BottomSheetWikiFragment bottomSheet = new BottomSheetWikiFragment();
			bottomSheet.show(getSupportFragmentManager(), "wikiBottomSheet");
			return true;
		} else if (id == R.id.save) {

			processWiki();
			return true;
		} else if (id == R.id.markdown) {

			if (action.equalsIgnoreCase("edit") || action.equalsIgnoreCase("add")) {
				if (renderMd) {
					Markdown.render(
							ctx,
							EmojiParser.parseToUnicode(
									String.valueOf(
											Objects.requireNonNull(
															binding.contentLayout.getEditText())
													.getText())),
							binding.markdownPreview,
							repository);

					binding.markdownPreview.setVisibility(View.VISIBLE);
					binding.contentLayout.setVisibility(View.GONE);
					renderMd = false;
				} else {
					binding.markdownPreview.setVisibility(View.GONE);
					binding.contentLayout.setVisibility(View.VISIBLE);
					renderMd = true;
				}
			} else {

				if (!renderMd) {

					if (binding.markdown.getAdapter() == null) {
						Markdown.render(
								ctx,
								EmojiParser.parseToUnicode(binding.contents.getContent()),
								binding.markdown,
								repository);
					}

					binding.contents.setVisibility(View.GONE);
					binding.markdownFrame.setVisibility(View.VISIBLE);

					renderMd = true;
				} else {
					binding.markdownFrame.setVisibility(View.GONE);
					binding.contents.setVisibility(View.VISIBLE);

					renderMd = false;
				}
			}

			return true;
		} else {
			return super.onOptionsItemSelected(item);
		}
	}
}