package com.travelagency.rest.resources;

import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import io.swagger.annotations.ApiParam;
import io.swagger.annotations.ApiResponse;
import io.swagger.annotations.ApiResponses;

import java.util.List;

import javax.ws.rs.BeanParam;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;

import com.travelagency.business.StatisticService;
import com.travelagency.model.business.Statistic;
import com.travelagency.rest.errorhandling.DataNotFoundException;
import com.travelagency.rest.resources.beans.StatisticFilterBean;

/**
 * Defines the REST requests of the stastic resource.
 *
 */
@Path("/statistics")
@Api(value = "/statistics")
public class StatisticResource {

    StatisticService statisticService = new StatisticService();

    /**
     * Defines the GET request for the statistic resource. The statistic can be
     * selected via query parameters.
     *
     * @param filterBean Filter parameter.
     * @return Result of the statistic.
     */
    @ApiOperation(
            value = "Get all statistics",
            response = Statistic.class
    )
    @ApiResponses(value = {
        @ApiResponse(code = 200, message = "All statistics fetched")
        ,
    		@ApiResponse(code = 500, message = "Internal server error")
        ,
    		@ApiResponse(code = 404, message = "Statistic method not found")
    })
    @GET
    @Produces(MediaType.APPLICATION_JSON)
    public Response getStatistics(@ApiParam(value = "statistic method that needs to be fetched", required = false) @BeanParam StatisticFilterBean filterBean) {
        Statistic statistic = statisticService.getStatistic();
        if (filterBean.getFind().toLowerCase() == "mostvisitedcountries") {
            return Response.status(200).entity(statistic.getMostVisitedCountries()).build();
        }
        else if (filterBean.getFind().toLowerCase() == "mostvisistedcities") {
            return Response.status(200).entity(statistic.getMostVisitedCities()).build();
        }
        else if (filterBean.getFind().toLowerCase() == "mostbookedaccomodations") {
            return Response.status(200).entity(statistic.getMostBookedAccomodations()).build();
        }
        else if (filterBean.getFind().toLowerCase() == "mostbookedactivities") {
            return Response.status(200).entity(statistic.getMostBookedAccomodations()).build();
        }
        else if (filterBean.getFind() != null) {
            throw new DataNotFoundException("the statistic " + filterBean.getFind() + " does not exist");
        }
        else
        	return Response.status(500).entity(statistic).build();
    }
}