/**
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this file,
 * You can obtain one at http://mozilla.org/MPL/2.0/.
 */
package org.mifosplatform.batch.command.internal;

import javax.ws.rs.core.UriInfo;

import org.mifosplatform.batch.command.CommandStrategy;
import org.mifosplatform.batch.domain.BatchRequest;
import org.mifosplatform.batch.domain.BatchResponse;
import org.mifosplatform.batch.exception.ErrorHandler;
import org.mifosplatform.batch.exception.ErrorInfo;
import org.mifosplatform.portfolio.loanaccount.api.LoanChargesApiResource;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

/**
 * Implements {@link org.mifosplatform.batch.command.CommandStrategy} and
 * Collect Charges for a Loan. It passes the contents of the body from the
 * BatchRequest to
 * {@link org.mifosplatform.portfolio.client.api.LoanChargesApiResource} and
 * gets back the response. This class will also catch any errors raised by
 * {@link org.mifosplatform.portfolio.client.api.LoanChargesApiResource} and map
 * those errors to appropriate status codes in BatchResponse.
 * 
 * @author Rishabh Shukla
 * 
 * @see org.mifosplatform.batch.command.CommandStrategy
 * @see org.mifosplatform.batch.domain.BatchRequest
 * @see org.mifosplatform.batch.domain.BatchResponse
 */
@Component
public class CollectChargesCommandStrategy implements CommandStrategy {

    private final LoanChargesApiResource loanChargesApiResource;

    @Autowired
    public CollectChargesCommandStrategy(final LoanChargesApiResource loanChargesApiResource) {
        this.loanChargesApiResource = loanChargesApiResource;
    }

    @Override
    public BatchResponse execute(BatchRequest request, UriInfo uriInfo) {

        final BatchResponse response = new BatchResponse();
        final String responseBody;

        response.setRequestId(request.getRequestId());
        response.setHeaders(request.getHeaders());

        final String[] pathParameters = request.getRelativeUrl().split("/");

        // Pluck out the loanId out of the relative path
        Long loanId = Long.parseLong(pathParameters[1]);

        // Try-catch blocks to map exceptions to appropriate status codes
        try {

            // Calls 'retrieveAllLoanCharges' function from
            // 'LoanChargesApiResource' to Collect
            // Charges for a loan
            responseBody = loanChargesApiResource.retrieveAllLoanCharges(loanId, uriInfo);

            response.setStatusCode(200);
            // Sets the body of the response after Charges have been
            // successfully collected
            response.setBody(responseBody);

        } catch (RuntimeException e) {

            // Gets an object of type ErrorInfo, containing information about
            // raised exception
            ErrorInfo ex = ErrorHandler.handler(e);

            response.setStatusCode(ex.getStatusCode());
            response.setBody(ex.getMessage());
        }

        return response;
    }
}