// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT License.
// Code generated by Microsoft (R) TypeSpec Code Generator.

package azure.clientgenerator.core.nextlinkverb.implementation;

import com.azure.core.annotation.ExpectedResponses;
import com.azure.core.annotation.HeaderParam;
import com.azure.core.annotation.Host;
import com.azure.core.annotation.HostParam;
import com.azure.core.annotation.PathParam;
import com.azure.core.annotation.Post;
import com.azure.core.annotation.ReturnType;
import com.azure.core.annotation.ServiceInterface;
import com.azure.core.annotation.ServiceMethod;
import com.azure.core.annotation.UnexpectedResponseExceptionType;
import com.azure.core.exception.ClientAuthenticationException;
import com.azure.core.exception.HttpResponseException;
import com.azure.core.exception.ResourceModifiedException;
import com.azure.core.exception.ResourceNotFoundException;
import com.azure.core.http.HttpPipeline;
import com.azure.core.http.HttpPipelineBuilder;
import com.azure.core.http.policy.RetryPolicy;
import com.azure.core.http.policy.UserAgentPolicy;
import com.azure.core.http.rest.PagedFlux;
import com.azure.core.http.rest.PagedIterable;
import com.azure.core.http.rest.PagedResponse;
import com.azure.core.http.rest.PagedResponseBase;
import com.azure.core.http.rest.RequestOptions;
import com.azure.core.http.rest.Response;
import com.azure.core.http.rest.RestProxy;
import com.azure.core.util.BinaryData;
import com.azure.core.util.Context;
import com.azure.core.util.FluxUtil;
import com.azure.core.util.serializer.JacksonAdapter;
import com.azure.core.util.serializer.SerializerAdapter;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;
import reactor.core.publisher.Mono;

/**
 * Initializes a new instance of the NextLinkVerbClient type.
 */
public final class NextLinkVerbClientImpl {
    /**
     * The proxy service used to perform REST calls.
     */
    private final NextLinkVerbClientService service;

    /**
     * Service host.
     */
    private final String endpoint;

    /**
     * Gets Service host.
     * 
     * @return the endpoint value.
     */
    public String getEndpoint() {
        return this.endpoint;
    }

    /**
     * The HTTP pipeline to send requests through.
     */
    private final HttpPipeline httpPipeline;

    /**
     * Gets The HTTP pipeline to send requests through.
     * 
     * @return the httpPipeline value.
     */
    public HttpPipeline getHttpPipeline() {
        return this.httpPipeline;
    }

    /**
     * The serializer to serialize an object into a string.
     */
    private final SerializerAdapter serializerAdapter;

    /**
     * Gets The serializer to serialize an object into a string.
     * 
     * @return the serializerAdapter value.
     */
    public SerializerAdapter getSerializerAdapter() {
        return this.serializerAdapter;
    }

    /**
     * Initializes an instance of NextLinkVerbClient client.
     * 
     * @param endpoint Service host.
     */
    public NextLinkVerbClientImpl(String endpoint) {
        this(new HttpPipelineBuilder().policies(new UserAgentPolicy(), new RetryPolicy()).build(),
            JacksonAdapter.createDefaultSerializerAdapter(), endpoint);
    }

    /**
     * Initializes an instance of NextLinkVerbClient client.
     * 
     * @param httpPipeline The HTTP pipeline to send requests through.
     * @param endpoint Service host.
     */
    public NextLinkVerbClientImpl(HttpPipeline httpPipeline, String endpoint) {
        this(httpPipeline, JacksonAdapter.createDefaultSerializerAdapter(), endpoint);
    }

    /**
     * Initializes an instance of NextLinkVerbClient client.
     * 
     * @param httpPipeline The HTTP pipeline to send requests through.
     * @param serializerAdapter The serializer to serialize an object into a string.
     * @param endpoint Service host.
     */
    public NextLinkVerbClientImpl(HttpPipeline httpPipeline, SerializerAdapter serializerAdapter, String endpoint) {
        this.httpPipeline = httpPipeline;
        this.serializerAdapter = serializerAdapter;
        this.endpoint = endpoint;
        this.service
            = RestProxy.create(NextLinkVerbClientService.class, this.httpPipeline, this.getSerializerAdapter());
    }

    /**
     * The interface defining all the services for NextLinkVerbClient to be used by the proxy service to perform REST
     * calls.
     */
    @Host("{endpoint}")
    @ServiceInterface(name = "NextLinkVerbClient")
    public interface NextLinkVerbClientService {
        @Post("/azure/client-generator-core/next-link-verb/items")
        @ExpectedResponses({ 200 })
        @UnexpectedResponseExceptionType(value = ClientAuthenticationException.class, code = { 401 })
        @UnexpectedResponseExceptionType(value = ResourceNotFoundException.class, code = { 404 })
        @UnexpectedResponseExceptionType(value = ResourceModifiedException.class, code = { 409 })
        @UnexpectedResponseExceptionType(HttpResponseException.class)
        Mono<Response<BinaryData>> listItems(@HostParam("endpoint") String endpoint,
            @HeaderParam("Accept") String accept, RequestOptions requestOptions, Context context);

        @Post("/azure/client-generator-core/next-link-verb/items")
        @ExpectedResponses({ 200 })
        @UnexpectedResponseExceptionType(value = ClientAuthenticationException.class, code = { 401 })
        @UnexpectedResponseExceptionType(value = ResourceNotFoundException.class, code = { 404 })
        @UnexpectedResponseExceptionType(value = ResourceModifiedException.class, code = { 409 })
        @UnexpectedResponseExceptionType(HttpResponseException.class)
        Response<BinaryData> listItemsSync(@HostParam("endpoint") String endpoint, @HeaderParam("Accept") String accept,
            RequestOptions requestOptions, Context context);

        @Post("{nextLink}")
        @ExpectedResponses({ 200 })
        @UnexpectedResponseExceptionType(value = ClientAuthenticationException.class, code = { 401 })
        @UnexpectedResponseExceptionType(value = ResourceNotFoundException.class, code = { 404 })
        @UnexpectedResponseExceptionType(value = ResourceModifiedException.class, code = { 409 })
        @UnexpectedResponseExceptionType(HttpResponseException.class)
        Mono<Response<BinaryData>> listItemsNext(@PathParam(value = "nextLink", encoded = true) String nextLink,
            @HostParam("endpoint") String endpoint, @HeaderParam("Accept") String accept, RequestOptions requestOptions,
            Context context);

        @Post("{nextLink}")
        @ExpectedResponses({ 200 })
        @UnexpectedResponseExceptionType(value = ClientAuthenticationException.class, code = { 401 })
        @UnexpectedResponseExceptionType(value = ResourceNotFoundException.class, code = { 404 })
        @UnexpectedResponseExceptionType(value = ResourceModifiedException.class, code = { 409 })
        @UnexpectedResponseExceptionType(HttpResponseException.class)
        Response<BinaryData> listItemsNextSync(@PathParam(value = "nextLink", encoded = true) String nextLink,
            @HostParam("endpoint") String endpoint, @HeaderParam("Accept") String accept, RequestOptions requestOptions,
            Context context);
    }

    /**
     * The listItems operation.
     * <p><strong>Response Body Schema</strong></p>
     * 
     * <pre>
     * {@code
     * {
     *     id: String (Required)
     * }
     * }
     * </pre>
     * 
     * @param requestOptions The options to configure the HTTP request before HTTP client sends it.
     * @throws HttpResponseException thrown if the request is rejected by server.
     * @throws ClientAuthenticationException thrown if the request is rejected by server on status code 401.
     * @throws ResourceNotFoundException thrown if the request is rejected by server on status code 404.
     * @throws ResourceModifiedException thrown if the request is rejected by server on status code 409.
     * @return paged response model along with {@link PagedResponse} on successful completion of {@link Mono}.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    private Mono<PagedResponse<BinaryData>> listItemsSinglePageAsync(RequestOptions requestOptions) {
        final String accept = "application/json";
        return FluxUtil.withContext(context -> service.listItems(this.getEndpoint(), accept, requestOptions, context))
            .map(res -> new PagedResponseBase<>(res.getRequest(), res.getStatusCode(), res.getHeaders(),
                getValues(res.getValue(), "items"), getNextLink(res.getValue(), "nextLink"), null));
    }

    /**
     * The listItems operation.
     * <p><strong>Response Body Schema</strong></p>
     * 
     * <pre>
     * {@code
     * {
     *     id: String (Required)
     * }
     * }
     * </pre>
     * 
     * @param requestOptions The options to configure the HTTP request before HTTP client sends it.
     * @throws HttpResponseException thrown if the request is rejected by server.
     * @throws ClientAuthenticationException thrown if the request is rejected by server on status code 401.
     * @throws ResourceNotFoundException thrown if the request is rejected by server on status code 404.
     * @throws ResourceModifiedException thrown if the request is rejected by server on status code 409.
     * @return paged response model as paginated response with {@link PagedFlux}.
     */
    @ServiceMethod(returns = ReturnType.COLLECTION)
    public PagedFlux<BinaryData> listItemsAsync(RequestOptions requestOptions) {
        RequestOptions requestOptionsForNextPage = new RequestOptions();
        requestOptionsForNextPage.setContext(
            requestOptions != null && requestOptions.getContext() != null ? requestOptions.getContext() : Context.NONE);
        return new PagedFlux<>(() -> listItemsSinglePageAsync(requestOptions),
            nextLink -> listItemsNextSinglePageAsync(nextLink, requestOptionsForNextPage));
    }

    /**
     * The listItems operation.
     * <p><strong>Response Body Schema</strong></p>
     * 
     * <pre>
     * {@code
     * {
     *     id: String (Required)
     * }
     * }
     * </pre>
     * 
     * @param requestOptions The options to configure the HTTP request before HTTP client sends it.
     * @throws HttpResponseException thrown if the request is rejected by server.
     * @throws ClientAuthenticationException thrown if the request is rejected by server on status code 401.
     * @throws ResourceNotFoundException thrown if the request is rejected by server on status code 404.
     * @throws ResourceModifiedException thrown if the request is rejected by server on status code 409.
     * @return paged response model along with {@link PagedResponse}.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    private PagedResponse<BinaryData> listItemsSinglePage(RequestOptions requestOptions) {
        final String accept = "application/json";
        Response<BinaryData> res = service.listItemsSync(this.getEndpoint(), accept, requestOptions, Context.NONE);
        return new PagedResponseBase<>(res.getRequest(), res.getStatusCode(), res.getHeaders(),
            getValues(res.getValue(), "items"), getNextLink(res.getValue(), "nextLink"), null);
    }

    /**
     * The listItems operation.
     * <p><strong>Response Body Schema</strong></p>
     * 
     * <pre>
     * {@code
     * {
     *     id: String (Required)
     * }
     * }
     * </pre>
     * 
     * @param requestOptions The options to configure the HTTP request before HTTP client sends it.
     * @throws HttpResponseException thrown if the request is rejected by server.
     * @throws ClientAuthenticationException thrown if the request is rejected by server on status code 401.
     * @throws ResourceNotFoundException thrown if the request is rejected by server on status code 404.
     * @throws ResourceModifiedException thrown if the request is rejected by server on status code 409.
     * @return paged response model as paginated response with {@link PagedIterable}.
     */
    @ServiceMethod(returns = ReturnType.COLLECTION)
    public PagedIterable<BinaryData> listItems(RequestOptions requestOptions) {
        RequestOptions requestOptionsForNextPage = new RequestOptions();
        requestOptionsForNextPage.setContext(
            requestOptions != null && requestOptions.getContext() != null ? requestOptions.getContext() : Context.NONE);
        return new PagedIterable<>(() -> listItemsSinglePage(requestOptions),
            nextLink -> listItemsNextSinglePage(nextLink, requestOptionsForNextPage));
    }

    /**
     * Get the next page of items.
     * <p><strong>Response Body Schema</strong></p>
     * 
     * <pre>
     * {@code
     * {
     *     id: String (Required)
     * }
     * }
     * </pre>
     * 
     * @param nextLink The URL to get the next list of items.
     * @param requestOptions The options to configure the HTTP request before HTTP client sends it.
     * @throws HttpResponseException thrown if the request is rejected by server.
     * @throws ClientAuthenticationException thrown if the request is rejected by server on status code 401.
     * @throws ResourceNotFoundException thrown if the request is rejected by server on status code 404.
     * @throws ResourceModifiedException thrown if the request is rejected by server on status code 409.
     * @return paged response model along with {@link PagedResponse} on successful completion of {@link Mono}.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    private Mono<PagedResponse<BinaryData>> listItemsNextSinglePageAsync(String nextLink,
        RequestOptions requestOptions) {
        final String accept = "application/json";
        return FluxUtil
            .withContext(
                context -> service.listItemsNext(nextLink, this.getEndpoint(), accept, requestOptions, context))
            .map(res -> new PagedResponseBase<>(res.getRequest(), res.getStatusCode(), res.getHeaders(),
                getValues(res.getValue(), "items"), getNextLink(res.getValue(), "nextLink"), null));
    }

    /**
     * Get the next page of items.
     * <p><strong>Response Body Schema</strong></p>
     * 
     * <pre>
     * {@code
     * {
     *     id: String (Required)
     * }
     * }
     * </pre>
     * 
     * @param nextLink The URL to get the next list of items.
     * @param requestOptions The options to configure the HTTP request before HTTP client sends it.
     * @throws HttpResponseException thrown if the request is rejected by server.
     * @throws ClientAuthenticationException thrown if the request is rejected by server on status code 401.
     * @throws ResourceNotFoundException thrown if the request is rejected by server on status code 404.
     * @throws ResourceModifiedException thrown if the request is rejected by server on status code 409.
     * @return paged response model along with {@link PagedResponse}.
     */
    @ServiceMethod(returns = ReturnType.SINGLE)
    private PagedResponse<BinaryData> listItemsNextSinglePage(String nextLink, RequestOptions requestOptions) {
        final String accept = "application/json";
        Response<BinaryData> res
            = service.listItemsNextSync(nextLink, this.getEndpoint(), accept, requestOptions, Context.NONE);
        return new PagedResponseBase<>(res.getRequest(), res.getStatusCode(), res.getHeaders(),
            getValues(res.getValue(), "items"), getNextLink(res.getValue(), "nextLink"), null);
    }

    private List<BinaryData> getValues(BinaryData binaryData, String path) {
        try {
            Map<?, ?> obj = binaryData.toObject(Map.class);
            List<?> values = (List<?>) obj.get(path);
            return values.stream().map(BinaryData::fromObject).collect(Collectors.toList());
        } catch (RuntimeException e) {
            return null;
        }
    }

    private String getNextLink(BinaryData binaryData, String path) {
        try {
            Map<?, ?> obj = binaryData.toObject(Map.class);
            return (String) obj.get(path);
        } catch (RuntimeException e) {
            return null;
        }
    }
}
