/*
 * 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 org.apache.fineract.cn.reporting.service.rest;

import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import org.apache.fineract.cn.reporting.api.v1.EventConstants;
import org.apache.fineract.cn.reporting.api.v1.PermittableGroupIds;
import org.apache.fineract.cn.reporting.api.v1.domain.ReportDefinition;
import org.apache.fineract.cn.reporting.api.v1.domain.ReportPage;
import org.apache.fineract.cn.reporting.api.v1.domain.ReportRequest;
import org.apache.fineract.cn.reporting.service.ServiceConstants;
import org.apache.fineract.cn.reporting.service.internal.provider.ReportSpecificationProvider;
import org.apache.fineract.cn.reporting.service.spi.ReportSpecification;
import java.util.List;
import java.util.Optional;
import org.apache.fineract.cn.anubis.annotation.AcceptedTokenType;
import org.apache.fineract.cn.anubis.annotation.Permittable;
import org.apache.fineract.cn.lang.ApplicationName;
import org.apache.fineract.cn.lang.ServiceException;
import org.apache.fineract.cn.lang.TenantContextHolder;
import org.apache.fineract.cn.lang.config.TenantHeaderFilter;
import org.slf4j.Logger;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.jms.core.JmsTemplate;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;

@SuppressWarnings("unused")
@RestController
@RequestMapping("/")
public class ReportingRestController {

  private final Logger logger;
  private final ReportSpecificationProvider reportSpecificationProvider;
  private final ApplicationName applicationName;
  private final JmsTemplate jmsTemplate;

  @Autowired
  public ReportingRestController(@Qualifier(ServiceConstants.LOGGER_NAME) final Logger logger,
                                 final ReportSpecificationProvider reportSpecificationProvider,
                                 final ApplicationName applicationName,
                                 final JmsTemplate jmsTemplate) {
    super();
    this.logger = logger;
    this.reportSpecificationProvider = reportSpecificationProvider;
    this.applicationName = applicationName;
    this.jmsTemplate = jmsTemplate;
  }

  @Permittable(value = AcceptedTokenType.SYSTEM)
  @RequestMapping(
      value = "/initialize",
      method = RequestMethod.POST,
      consumes = MediaType.ALL_VALUE,
      produces = MediaType.APPLICATION_JSON_VALUE
  )
  public
  @ResponseBody
  ResponseEntity<Void> initialize() {
    final Gson gson = new GsonBuilder().create();
    this.jmsTemplate.convertAndSend(
        gson.toJson(this.applicationName.getVersionString()),
        message -> {
          if (TenantContextHolder.identifier().isPresent()) {
            message.setStringProperty(
                TenantHeaderFilter.TENANT_HEADER,
                TenantContextHolder.checkedGetIdentifier());
          }
          message.setStringProperty(
              EventConstants.SELECTOR_NAME,
              EventConstants.INITIALIZE
          );
          return message;
        }
    );

    return ResponseEntity.ok().build();
  }

  @Permittable(value = AcceptedTokenType.TENANT, groupId = PermittableGroupIds.REPORT_MANAGEMENT)
  @RequestMapping(
      value = "/categories",
      method = RequestMethod.GET,
      produces = MediaType.APPLICATION_JSON_VALUE,
      consumes = MediaType.ALL_VALUE
  )
  public
  ResponseEntity<List<String>> fetchCategories() {
    return ResponseEntity.ok(this.reportSpecificationProvider.getAvailableCategories());
  }

  @Permittable(value = AcceptedTokenType.TENANT, groupId = PermittableGroupIds.REPORT_MANAGEMENT)
  @RequestMapping(
      value = "categories/{category}",
      method = RequestMethod.GET,
      produces = MediaType.APPLICATION_JSON_VALUE,
      consumes = MediaType.ALL_VALUE)
  public
  ResponseEntity<List<ReportDefinition>> fetchReportDefinitions(@PathVariable("category") final String category) {
    return ResponseEntity.ok(this.reportSpecificationProvider.getAvailableReports(category));
  }

  @Permittable(value = AcceptedTokenType.TENANT, groupId = PermittableGroupIds.REPORT_MANAGEMENT)
  @RequestMapping(
      value = "/categories/{category}/reports/{identifier}",
      method = RequestMethod.POST,
      produces = MediaType.APPLICATION_JSON_VALUE,
      consumes = MediaType.APPLICATION_JSON_VALUE
  )
  public
  ResponseEntity<ReportPage> generateReport(@PathVariable("category") final String category,
                                           @PathVariable("identifier") final String identifier,
                                           @RequestBody final ReportRequest reportRequest,
                                           @RequestParam(value = "pageIndex", required = false) final Integer pageIndex,
                                           @RequestParam(value = "size", required = false) final Integer size) {

    final Optional<ReportSpecification> optionalReportSpecification =
        this.reportSpecificationProvider.getReportSpecification(category, identifier);
    if (optionalReportSpecification.isPresent()) {
      final ReportSpecification reportSpecification = optionalReportSpecification.get();

      try {
        reportSpecification.validate(reportRequest);
      } catch (final IllegalArgumentException iaex) {
        throw ServiceException.badRequest(iaex.getMessage());
      }

      return ResponseEntity.ok(reportSpecification.generateReport(reportRequest, pageIndex, size));
    } else {
      throw ServiceException.notFound("Report {0} not found.", identifier);
    }
  }

  @Permittable(value = AcceptedTokenType.TENANT, groupId = PermittableGroupIds.REPORT_MANAGEMENT)
  @RequestMapping(
      value = "categories/{category}/definitions/{identifier}",
      method = RequestMethod.GET,
      produces = MediaType.APPLICATION_JSON_VALUE,
      consumes = MediaType.ALL_VALUE)
  public
  ResponseEntity<ReportDefinition> findReportDefinition(
      @PathVariable("category") final String category,
      @PathVariable("identifier") final String identifier) {
    return ResponseEntity.ok(
        this.reportSpecificationProvider.findReportDefinition(category, identifier)
            .orElseThrow(() -> ServiceException.notFound("Report definition {0} not found.", identifier))
    );
  }
}