/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package com.epam.dlab.backendapi.service.aws;

import com.epam.dlab.auth.UserInfo;
import com.epam.dlab.backendapi.dao.aws.AwsBillingDAO;
import com.epam.dlab.backendapi.resources.dto.BillingFilter;
import com.epam.dlab.backendapi.service.BillingService;
import com.epam.dlab.backendapi.util.CSVFormatter;
import com.epam.dlab.model.aws.ReportLine;
import com.google.inject.Singleton;
import lombok.extern.slf4j.Slf4j;
import org.bson.Document;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.List;

@Slf4j
@Singleton
public class AwsBillingService extends BillingService {

	@Override
	public String getReportFileName(UserInfo userInfo, BillingFilter filter) {
		return "aws-billing-report.csv";
	}

	public String getFirstLine(Document document) throws ParseException {

		SimpleDateFormat from = new SimpleDateFormat("yyyy-MM-dd");
		SimpleDateFormat to = new SimpleDateFormat("MMM dd, yyyy");

		return String.format("Service base name: %s  " +
						"Resource tag ID: %s  " +
						"Available reporting period from: %s to: %s",
				document.get(AwsBillingDAO.SERVICE_BASE_NAME), document.get(AwsBillingDAO.TAG_RESOURCE_ID),
				to.format(from.parse((String) document.get(AwsBillingDAO.USAGE_DATE_START))),
				to.format(from.parse((String) document.get(AwsBillingDAO.USAGE_DATE_END))));

	}

	public List<String> getHeadersList(boolean full) {
		List<String> headers = new ArrayList<>();

		if (full) {
			headers.add("USER");
		}

		headers.add("PROJECT");
		headers.add("ENVIRONMENT NAME");
		headers.add("RESOURCE TYPE");
		headers.add("SHAPE");
		headers.add("SERVICE");
		headers.add("SERVICE CHARGES");

		return headers;
	}

	public String getLine(boolean full, Document document) {
		List<String> items = new ArrayList<>();

		if (full) {
			items.add(getValueOrEmpty(document, ReportLine.FIELD_USER_ID));
		}

		items.add(getValueOrEmpty(document, ReportLine.FIELD_PROJECT));
		items.add(getValueOrEmpty(document, ReportLine.FIELD_DLAB_ID));
		items.add(getValueOrEmpty(document, AwsBillingDAO.DLAB_RESOURCE_TYPE));
		items.add(getValueOrEmpty(document, AwsBillingDAO.SHAPE).replace(System.lineSeparator(), " "));
		items.add(getValueOrEmpty(document, ReportLine.FIELD_PRODUCT));

		items.add(getValueOrEmpty(document, ReportLine.FIELD_COST)
				+ " " + getValueOrEmpty(document, ReportLine.FIELD_CURRENCY_CODE));

		return CSVFormatter.formatLine(items, CSVFormatter.SEPARATOR);
	}

	public String getTotal(boolean full, Document document) {
		int padding = getHeadersList(full).size() - 1;

		List<String> items = new ArrayList<>();
		while (padding-- > 0) {
			items.add("");
		}

		items.add(String.format("Total: %s %s", getValueOrEmpty(document, AwsBillingDAO.COST_TOTAL),
				getValueOrEmpty(document, ReportLine.FIELD_CURRENCY_CODE)));

		return CSVFormatter.formatLine(items, CSVFormatter.SEPARATOR);

	}
}