/*
 * Copyright 2010-2013 Ning, Inc.
 *
 * Ning 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.killbill.billing.jaxrs.resources;

import java.io.IOException;
import java.io.OutputStream;
import java.util.UUID;

import javax.inject.Inject;
import javax.servlet.http.HttpServletRequest;
import javax.ws.rs.GET;
import javax.ws.rs.HeaderParam;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.Produces;
import javax.ws.rs.WebApplicationException;
import javax.ws.rs.core.StreamingOutput;

import org.killbill.billing.account.api.AccountUserApi;
import org.killbill.billing.jaxrs.util.Context;
import org.killbill.billing.jaxrs.util.JaxrsUriBuilder;
import org.killbill.billing.payment.api.PaymentApi;
import org.killbill.billing.util.api.AuditUserApi;
import org.killbill.billing.util.api.CustomFieldUserApi;
import org.killbill.billing.util.api.ExportUserApi;
import org.killbill.billing.util.api.TagUserApi;
import org.killbill.billing.util.callcontext.CallContext;
import org.killbill.clock.Clock;
import org.killbill.commons.metrics.TimedResource;

import com.google.inject.Singleton;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import io.swagger.annotations.ApiResponse;
import io.swagger.annotations.ApiResponses;

import static javax.ws.rs.core.MediaType.TEXT_PLAIN;

@Singleton
@Path(JaxrsResource.EXPORT_PATH)
@Api(value = JaxrsResource.EXPORT_PATH, description = "Export endpoints")
public class ExportResource extends JaxRsResourceBase {

    private final ExportUserApi exportUserApi;

    @Inject
    public ExportResource(final ExportUserApi exportUserApi,
                          final JaxrsUriBuilder uriBuilder,
                          final TagUserApi tagUserApi,
                          final CustomFieldUserApi customFieldUserApi,
                          final AuditUserApi auditUserApi,
                          final AccountUserApi accountUserApi,
                          final PaymentApi paymentApi,
                          final Clock clock,
                          final Context context) {
        super(uriBuilder, tagUserApi, customFieldUserApi, auditUserApi, accountUserApi, paymentApi, null, clock, context);
        this.exportUserApi = exportUserApi;
    }

    @TimedResource
    @GET
    @Path("/{accountId:" + UUID_PATTERN + "}")
    @Produces(TEXT_PLAIN)
    @ApiOperation(value = "Export account data", response = String.class)
    @ApiResponses(value = {@ApiResponse(code = 400, message = "Invalid account id supplied"),
                           @ApiResponse(code = 404, message = "Account not found")})
    public StreamingOutput exportDataForAccount(@PathParam("accountId") final String accountIdStr
            ,
                                                @HeaderParam(HDR_CREATED_BY) final String createdBy,
                                                @HeaderParam(HDR_REASON) final String reason,
                                                @HeaderParam(HDR_COMMENT) final String comment,
                                                @javax.ws.rs.core.Context final HttpServletRequest request) {
        final UUID accountId = UUID.fromString(accountIdStr);
        final CallContext callContext = context.createCallContextWithAccountId(accountId, createdBy, reason, comment, request);
        return new StreamingOutput() {
            @Override
            public void write(final OutputStream output) throws IOException, WebApplicationException {
                // CSV by default for now
                exportUserApi.exportDataAsCSVForAccount(accountId, output, callContext);
            }
        };
    }
}
