/*
Copyright (c) 2015 Red Hat, Inc.
Licensed 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.ovirt.engine.sdk4.internal.services;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.net.URISyntaxException;
import java.util.Map;
import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpDelete;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.methods.HttpPut;
import org.apache.http.client.utils.URIBuilder;
import org.apache.http.entity.ByteArrayEntity;
import org.apache.http.util.EntityUtils;
import org.ovirt.api.metamodel.runtime.xml.XmlReader;
import org.ovirt.api.metamodel.runtime.xml.XmlWriter;
import org.ovirt.engine.sdk4.BaseRequest;
import org.ovirt.engine.sdk4.Error;
import org.ovirt.engine.sdk4.Service;
import org.ovirt.engine.sdk4.builders.ActionBuilder;
import org.ovirt.engine.sdk4.builders.DiskBuilder;
import org.ovirt.engine.sdk4.builders.HostBuilder;
import org.ovirt.engine.sdk4.builders.StorageDomainBuilder;
import org.ovirt.engine.sdk4.internal.HttpConnection;
import org.ovirt.engine.sdk4.internal.xml.XmlActionWriter;
import org.ovirt.engine.sdk4.internal.xml.XmlDiskReader;
import org.ovirt.engine.sdk4.internal.xml.XmlDiskWriter;
import org.ovirt.engine.sdk4.services.AssignedPermissionsService;
import org.ovirt.engine.sdk4.services.DiskService;
import org.ovirt.engine.sdk4.services.StatisticsService;
import org.ovirt.engine.sdk4.types.Action;
import org.ovirt.engine.sdk4.types.Disk;
import org.ovirt.engine.sdk4.types.Host;
import org.ovirt.engine.sdk4.types.StorageDomain;

public class DiskServiceImpl extends MeasurableServiceImpl implements DiskService {
    
    public DiskServiceImpl(HttpConnection connection, String path) {
        super(connection, path);
    }
    
    private class CopyRequestImpl extends BaseRequest<CopyRequest, CopyResponse> implements CopyRequest {
        private Boolean async;
        public CopyRequest async(Boolean async) {
            this.async = async;
            return this;
        }
        
        private Disk disk;
        public CopyRequest disk(Disk disk) {
            this.disk = disk;
            return this;
        }
        
        public CopyRequest disk(DiskBuilder disk) {
            this.disk = disk.build();
            return this;
        }
        
        private Boolean filter;
        public CopyRequest filter(Boolean filter) {
            this.filter = filter;
            return this;
        }
        
        private StorageDomain storageDomain;
        public CopyRequest storageDomain(StorageDomain storageDomain) {
            this.storageDomain = storageDomain;
            return this;
        }
        
        public CopyRequest storageDomain(StorageDomainBuilder storageDomain) {
            this.storageDomain = storageDomain.build();
            return this;
        }
        
        public CopyResponse send() {
            HttpPost request = new HttpPost(getConnection().getUrl() + getPath() + "/copy");
            try (
              ByteArrayOutputStream output = new ByteArrayOutputStream();
              XmlWriter xmlWriter = new XmlWriter(output, true)
            ) {
                ActionBuilder action = new ActionBuilder();
                action.async(async);
                action.disk(disk);
                action.filter(filter);
                action.storageDomain(storageDomain);
                XmlActionWriter.writeOne(action.build(), xmlWriter);
                xmlWriter.flush();
                request.setEntity(new ByteArrayEntity(output.toByteArray()));
            }
            catch (IOException ex) {
                throw new Error("Failed to write request", ex);
            }
            
            if (headers != null) {
                for (Map.Entry<String, String> header : headers.entrySet()) {
                    request.setHeader(header.getKey(), header.getValue());
                }
            }
            
            HttpResponse response = getConnection().send(request);
            Action action = checkAction(response);
            EntityUtils.consumeQuietly(response.getEntity());
            return new CopyResponseImpl();
        }
        
    }
    
    private class CopyResponseImpl implements CopyResponse {
    }
    
    public CopyRequest copy() {
        return new CopyRequestImpl();
    }
    
    private class ExportRequestImpl extends BaseRequest<ExportRequest, ExportResponse> implements ExportRequest {
        private Boolean async;
        public ExportRequest async(Boolean async) {
            this.async = async;
            return this;
        }
        
        private Boolean filter;
        public ExportRequest filter(Boolean filter) {
            this.filter = filter;
            return this;
        }
        
        private StorageDomain storageDomain;
        public ExportRequest storageDomain(StorageDomain storageDomain) {
            this.storageDomain = storageDomain;
            return this;
        }
        
        public ExportRequest storageDomain(StorageDomainBuilder storageDomain) {
            this.storageDomain = storageDomain.build();
            return this;
        }
        
        public ExportResponse send() {
            HttpPost request = new HttpPost(getConnection().getUrl() + getPath() + "/export");
            try (
              ByteArrayOutputStream output = new ByteArrayOutputStream();
              XmlWriter xmlWriter = new XmlWriter(output, true)
            ) {
                ActionBuilder action = new ActionBuilder();
                action.async(async);
                action.filter(filter);
                action.storageDomain(storageDomain);
                XmlActionWriter.writeOne(action.build(), xmlWriter);
                xmlWriter.flush();
                request.setEntity(new ByteArrayEntity(output.toByteArray()));
            }
            catch (IOException ex) {
                throw new Error("Failed to write request", ex);
            }
            
            if (headers != null) {
                for (Map.Entry<String, String> header : headers.entrySet()) {
                    request.setHeader(header.getKey(), header.getValue());
                }
            }
            
            HttpResponse response = getConnection().send(request);
            Action action = checkAction(response);
            EntityUtils.consumeQuietly(response.getEntity());
            return new ExportResponseImpl();
        }
        
    }
    
    private class ExportResponseImpl implements ExportResponse {
    }
    
    public ExportRequest export() {
        return new ExportRequestImpl();
    }
    
    private class GetRequestImpl extends BaseRequest<GetRequest, GetResponse> implements GetRequest {
        public GetResponse send() {
            HttpGet request = null;
            try {
                URIBuilder uriBuilder = new URIBuilder(getConnection().getUrl() + getPath());
                if (query != null) {
                    for (Map.Entry<String, String> queryParam : query.entrySet()) {
                        uriBuilder.addParameter(queryParam.getKey(), queryParam.getValue());
                    }
                }
                request = new HttpGet(uriBuilder.build());
            }
            catch (URISyntaxException ex) {
                throw new Error("Failed to build URL", ex);
            }
            
            if (headers != null) {
                for (Map.Entry<String, String> header : headers.entrySet()) {
                    request.setHeader(header.getKey(), header.getValue());
                }
            }
            
            HttpResponse response = getConnection().send(request);
            if (
              response.getStatusLine().getStatusCode() == 200
            ) {
                try (
                  XmlReader reader = new XmlReader(response.getEntity().getContent())
                ) {
                    return new GetResponseImpl(XmlDiskReader.readOne(reader));
                }
                catch (IOException ex) {
                    throw new Error("Failed to read response", ex);
                }
                finally {
                    EntityUtils.consumeQuietly(response.getEntity());
                }
            }
            else {
                checkFault(response);
                return new GetResponseImpl(null);
            }
        }
        
    }
    
    private class GetResponseImpl implements GetResponse {
        private Disk disk;
        
        public GetResponseImpl(Disk disk) {
            this.disk = disk;
        }
        
        public Disk disk() {
            return disk;
        }
        
    }
    
    public GetRequest get() {
        return new GetRequestImpl();
    }
    
    private class MoveRequestImpl extends BaseRequest<MoveRequest, MoveResponse> implements MoveRequest {
        private Boolean async;
        public MoveRequest async(Boolean async) {
            this.async = async;
            return this;
        }
        
        private Boolean filter;
        public MoveRequest filter(Boolean filter) {
            this.filter = filter;
            return this;
        }
        
        private StorageDomain storageDomain;
        public MoveRequest storageDomain(StorageDomain storageDomain) {
            this.storageDomain = storageDomain;
            return this;
        }
        
        public MoveRequest storageDomain(StorageDomainBuilder storageDomain) {
            this.storageDomain = storageDomain.build();
            return this;
        }
        
        public MoveResponse send() {
            HttpPost request = new HttpPost(getConnection().getUrl() + getPath() + "/move");
            try (
              ByteArrayOutputStream output = new ByteArrayOutputStream();
              XmlWriter xmlWriter = new XmlWriter(output, true)
            ) {
                ActionBuilder action = new ActionBuilder();
                action.async(async);
                action.filter(filter);
                action.storageDomain(storageDomain);
                XmlActionWriter.writeOne(action.build(), xmlWriter);
                xmlWriter.flush();
                request.setEntity(new ByteArrayEntity(output.toByteArray()));
            }
            catch (IOException ex) {
                throw new Error("Failed to write request", ex);
            }
            
            if (headers != null) {
                for (Map.Entry<String, String> header : headers.entrySet()) {
                    request.setHeader(header.getKey(), header.getValue());
                }
            }
            
            HttpResponse response = getConnection().send(request);
            Action action = checkAction(response);
            EntityUtils.consumeQuietly(response.getEntity());
            return new MoveResponseImpl();
        }
        
    }
    
    private class MoveResponseImpl implements MoveResponse {
    }
    
    public MoveRequest move() {
        return new MoveRequestImpl();
    }
    
    private class RefreshLunRequestImpl extends BaseRequest<RefreshLunRequest, RefreshLunResponse> implements RefreshLunRequest {
        private Host host;
        public RefreshLunRequest host(Host host) {
            this.host = host;
            return this;
        }
        
        public RefreshLunRequest host(HostBuilder host) {
            this.host = host.build();
            return this;
        }
        
        public RefreshLunResponse send() {
            HttpPost request = new HttpPost(getConnection().getUrl() + getPath() + "/refreshlun");
            try (
              ByteArrayOutputStream output = new ByteArrayOutputStream();
              XmlWriter xmlWriter = new XmlWriter(output, true)
            ) {
                ActionBuilder action = new ActionBuilder();
                action.host(host);
                XmlActionWriter.writeOne(action.build(), xmlWriter);
                xmlWriter.flush();
                request.setEntity(new ByteArrayEntity(output.toByteArray()));
            }
            catch (IOException ex) {
                throw new Error("Failed to write request", ex);
            }
            
            if (headers != null) {
                for (Map.Entry<String, String> header : headers.entrySet()) {
                    request.setHeader(header.getKey(), header.getValue());
                }
            }
            
            HttpResponse response = getConnection().send(request);
            Action action = checkAction(response);
            EntityUtils.consumeQuietly(response.getEntity());
            return new RefreshLunResponseImpl();
        }
        
    }
    
    private class RefreshLunResponseImpl implements RefreshLunResponse {
    }
    
    public RefreshLunRequest refreshLun() {
        return new RefreshLunRequestImpl();
    }
    
    private class RemoveRequestImpl extends BaseRequest<RemoveRequest, RemoveResponse> implements RemoveRequest {
        private Boolean async;
        public RemoveRequest async(Boolean async) {
            this.async = async;
            return this;
        }
        
        public RemoveResponse send() {
            HttpDelete request = null;
            try {
                URIBuilder uriBuilder = new URIBuilder(getConnection().getUrl() + getPath());
                if (async != null) {
                    uriBuilder.addParameter("async", XmlWriter.renderBoolean(async));
                }
                if (query != null) {
                    for (Map.Entry<String, String> queryParam : query.entrySet()) {
                        uriBuilder.addParameter(queryParam.getKey(), queryParam.getValue());
                    }
                }
                request = new HttpDelete(uriBuilder.build());
            }
            catch (URISyntaxException ex) {
                throw new Error("Failed to build URL", ex);
            }
            
            if (headers != null) {
                for (Map.Entry<String, String> header : headers.entrySet()) {
                    request.setHeader(header.getKey(), header.getValue());
                }
            }
            
            HttpResponse response = getConnection().send(request);
            if (
              response.getStatusLine().getStatusCode() == 200
            ) {
                EntityUtils.consumeQuietly(response.getEntity());
                return new RemoveResponseImpl();
            }
            else {
                checkFault(response);
                return new RemoveResponseImpl();
            }
        }
        
    }
    
    private class RemoveResponseImpl implements RemoveResponse {
    }
    
    public RemoveRequest remove() {
        return new RemoveRequestImpl();
    }
    
    private class SparsifyRequestImpl extends BaseRequest<SparsifyRequest, SparsifyResponse> implements SparsifyRequest {
        public SparsifyResponse send() {
            HttpPost request = new HttpPost(getConnection().getUrl() + getPath() + "/sparsify");
            try (
              ByteArrayOutputStream output = new ByteArrayOutputStream();
              XmlWriter xmlWriter = new XmlWriter(output, true)
            ) {
                ActionBuilder action = new ActionBuilder();
                XmlActionWriter.writeOne(action.build(), xmlWriter);
                xmlWriter.flush();
                request.setEntity(new ByteArrayEntity(output.toByteArray()));
            }
            catch (IOException ex) {
                throw new Error("Failed to write request", ex);
            }
            
            if (headers != null) {
                for (Map.Entry<String, String> header : headers.entrySet()) {
                    request.setHeader(header.getKey(), header.getValue());
                }
            }
            
            HttpResponse response = getConnection().send(request);
            Action action = checkAction(response);
            EntityUtils.consumeQuietly(response.getEntity());
            return new SparsifyResponseImpl();
        }
        
    }
    
    private class SparsifyResponseImpl implements SparsifyResponse {
    }
    
    public SparsifyRequest sparsify() {
        return new SparsifyRequestImpl();
    }
    
    private class UpdateRequestImpl extends BaseRequest<UpdateRequest, UpdateResponse> implements UpdateRequest {
        private Disk disk;
        public UpdateRequest disk(Disk disk) {
            this.disk = disk;
            return this;
        }
        
        public UpdateRequest disk(DiskBuilder disk) {
            this.disk = disk.build();
            return this;
        }
        
        public UpdateResponse send() {
            HttpPut request = null;
            try {
                URIBuilder uriBuilder = new URIBuilder(getConnection().getUrl() + getPath());
                if (query != null) {
                    for (Map.Entry<String, String> queryParam : query.entrySet()) {
                        uriBuilder.addParameter(queryParam.getKey(), queryParam.getValue());
                    }
                }
                request = new HttpPut(uriBuilder.build());
            }
            catch (URISyntaxException ex) {
                throw new Error("Failed to build URL", ex);
            }
            try (
              ByteArrayOutputStream output = new ByteArrayOutputStream();
              XmlWriter xmlWriter = new XmlWriter(output, true)
            ) {
                XmlDiskWriter.writeOne(disk, xmlWriter);
                xmlWriter.flush();
                request.setEntity(new ByteArrayEntity(output.toByteArray()));
            }
            catch (IOException ex) {
                throw new Error("Failed to parse response", ex);
            }
            
            if (headers != null) {
                for (Map.Entry<String, String> header : headers.entrySet()) {
                    request.setHeader(header.getKey(), header.getValue());
                }
            }
            
            HttpResponse response = getConnection().send(request);
            if (
              response.getStatusLine().getStatusCode() == 200
            ) {
                try (
                  XmlReader reader = new XmlReader(response.getEntity().getContent())
                ) {
                    return new UpdateResponseImpl(XmlDiskReader.readOne(reader));
                }
                catch (IOException ex) {
                    throw new Error("Failed to read response", ex);
                }
                finally {
                    EntityUtils.consumeQuietly(response.getEntity());
                }
            }
            else {
                checkFault(response);
                return new UpdateResponseImpl(null);
            }
        }
        
    }
    
    private class UpdateResponseImpl implements UpdateResponse {
        private Disk disk;
        
        public UpdateResponseImpl(Disk disk) {
            this.disk = disk;
        }
        
        public Disk disk() {
            return disk;
        }
        
    }
    
    public UpdateRequest update() {
        return new UpdateRequestImpl();
    }
    
    public AssignedPermissionsService permissionsService() {
        return new AssignedPermissionsServiceImpl(getConnection(), getPath() + "/permissions");
    }
    
    public StatisticsService statisticsService() {
        return new StatisticsServiceImpl(getConnection(), getPath() + "/statistics");
    }
    
    public Service service(String path) {
        if (path == null) {
            return this;
        }
        
        if (path.equals("permissions")) {
            return permissionsService();
        }
        if (path.startsWith("permissions/")) {
            return permissionsService().service(path.substring(12));
        }
        if (path.equals("statistics")) {
            return statisticsService();
        }
        if (path.startsWith("statistics/")) {
            return statisticsService().service(path.substring(11));
        }
        throw new Error("The path " + path + " doesn't correspond to any service");
    }
    
    public String toString() {
        return "DiskService:" + getPath();
    }
    
}

