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/*
 * Copyright (c) 2020 Bixbit s.c. All rights reserved.
 * See LICENSE file for licensing information.
 */

package io.imunity.furms.ui.views.fenix.communites;

import com.vaadin.flow.component.Component;
import com.vaadin.flow.component.UI;
import com.vaadin.flow.component.button.Button;
import com.vaadin.flow.component.dialog.Dialog;
import com.vaadin.flow.component.grid.ColumnTextAlign;
import com.vaadin.flow.component.grid.Grid;
import com.vaadin.flow.component.orderedlayout.HorizontalLayout;
import com.vaadin.flow.router.Route;
import com.vaadin.flow.router.RouterLink;
import io.imunity.furms.api.communites.CommunityService;
import io.imunity.furms.domain.communities.CommunityId;
import io.imunity.furms.ui.community.CommunityViewModel;
import io.imunity.furms.ui.community.CommunityViewModelMapper;
import io.imunity.furms.ui.components.*;
import io.imunity.furms.ui.components.layout.BreadCrumbParameter;
import io.imunity.furms.ui.views.fenix.menu.FenixAdminMenu;

import java.util.Collections;
import java.util.List;
import java.util.Optional;

import static com.vaadin.flow.component.icon.VaadinIcon.*;
import static io.imunity.furms.ui.utils.NotificationUtils.showErrorNotification;
import static io.imunity.furms.ui.utils.VaadinExceptionHandler.getResultOrException;
import static io.imunity.furms.ui.utils.VaadinExceptionHandler.handleExceptions;
import static io.imunity.furms.ui.views.fenix.communites.CommunityConst.*;
import static java.util.Comparator.comparing;
import static java.util.stream.Collectors.toList;

@Route(value = "fenix/admin/communities", layout = FenixAdminMenu.class)
@PageTitle(key = "view.fenix-admin.communities.page.title")
public class CommunitiesView extends FurmsViewComponent {
	private final CommunityService communityService;
	private final Grid grid;

	CommunitiesView(CommunityService communityService) {
		this.communityService = communityService;

		HorizontalLayout header = createHeaderLayout();
		grid = createCommunityGrid();
		loadGridContent();

		getContent().add(header, new HorizontalLayout(grid));
	}

	private HorizontalLayout createHeaderLayout() {
		Button addButton = new Button(getTranslation("view.fenix-admin.communities.button.add"), PLUS_CIRCLE.create());
		addButton.addClickListener(x -> UI.getCurrent().navigate(CommunityFormView.class));

		return new ViewHeaderLayout(getTranslation("view.fenix-admin.communities.header"), addButton);
	}

	private Grid createCommunityGrid() {
		Grid grid = new DenseGrid<>(CommunityViewModel.class);

		grid.addComponentColumn(c -> new RouterGridLink(c.getName(), c.getId().id.toString(), CommunityView.class, PARAM_NAME,
				ADMINISTRATORS_PARAM))
			.setHeader(getTranslation("view.fenix-admin.communities.grid.column.1"))
			.setSortable(true)
			.setComparator(CommunityViewModel::getName);
		grid.addColumn(CommunityViewModel::getDescription)
			.setHeader(getTranslation("view.fenix-admin.communities.grid.column.2"))
			.setSortable(true);
		grid.addComponentColumn(this::createLastColumnContent)
			.setHeader(getTranslation("view.fenix-admin.communities.grid.column.3"))
			.setTextAlign(ColumnTextAlign.END);

		return grid;
	}

	private HorizontalLayout createLastColumnContent(CommunityViewModel c) {
		return new GridActionsButtonLayout(
			new RouterGridLink(USERS, c.getId().id.toString(), CommunityView.class, PARAM_NAME, ADMINISTRATORS_PARAM),
			new RouterGridLink(PIE_CHART, c.getId().id.toString(), CommunityView.class, PARAM_NAME, ALLOCATIONS_PARAM),
			createContextMenu(c.getId(), c.getName())
		);
	}

	private void loadGridContent() {
		List allCommunities = handleExceptions(() -> communityService.findAll())
			.orElseGet(Collections::emptySet)
			.stream()
			.map(CommunityViewModelMapper::map)
			.sorted(comparing(projectViewModel -> projectViewModel.getName().toLowerCase()))
			.collect(toList());
		grid.setItems(allCommunities);
	}

	private Component createContextMenu(CommunityId communityId, String communityName) {
		GridActionMenu contextMenu = new GridActionMenu();

		contextMenu.addItem(new MenuButton(getTranslation("view.fenix-admin.communities.menu.edit"), EDIT), event ->
			UI.getCurrent().navigate(CommunityFormView.class, communityId.id.toString())
		);

		Dialog confirmDialog = createConfirmDialog(communityId, communityName);
		contextMenu.addItem(
			new MenuButton(getTranslation("view.fenix-admin.communities.menu.delete"), TRASH),
			event -> confirmDialog.open()
		);

		MenuButton adminComp = new MenuButton(getTranslation("view.fenix-admin.communities.menu.administrators"), USERS);
		RouterLink administratorsPool = new RouterGridLink(adminComp, communityId.id.toString(), CommunityView.class, PARAM_NAME,
			ADMINISTRATORS_PARAM);
		contextMenu.addItem(administratorsPool);

		MenuButton allocationComp = new MenuButton(getTranslation("view.fenix-admin.communities.menu.allocations"), PIE_CHART);
		RouterLink allocationsPool = new RouterGridLink(allocationComp, communityId.id.toString(), CommunityView.class, PARAM_NAME
			, ALLOCATIONS_PARAM);
		contextMenu.addItem(allocationsPool);

		getContent().add(contextMenu);
		return contextMenu.getTarget();
	}

	private Dialog createConfirmDialog(CommunityId communityId, String communityName) {
		FurmsDialog furmsDialog = new FurmsDialog(getTranslation("view.fenix-admin.community.dialog.text", communityName));
		furmsDialog.addConfirmButtonClickListener(event -> {
			getResultOrException(() -> communityService.delete(communityId))
				.getException()
				.ifPresent(throwable -> showErrorNotification(getTranslation(throwable.getMessage(), communityName)));
			loadGridContent();
		});
		return furmsDialog;
	}

	@Override
	public Optional getParameter(){
		return Optional.of(new BreadCrumbParameter("", getTranslation("view.fenix-admin.communities.breadcrumb")));
	}
}