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 *
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 * in the documentation and/or other materials provided with the
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#import <UIKit/UIKit.h>
#import <XCTest/XCTest.h>

#import <gRPC/GRPCCall.h>
#import <gRPC/GRPCMethodName.h>
#import <gRPC/GRXWriter+Immediate.h>
#import <gRPC/GRXWriteable.h>
#import <RemoteTest/Messages.pbobjc.h>

@interface RemoteTests : XCTestCase
@end

@implementation RemoteTests

- (void)testConnectionToRemoteServer {
  __weak XCTestExpectation *expectation = [self expectationWithDescription:@"Server reachable."];

  // This method isn't implemented by the remote server.
  GRPCMethodName *method = [[GRPCMethodName alloc] initWithPackage:@"grpc.testing"
                                                         interface:@"TestService"
                                                            method:@"Nonexistent"];

  id<GRXWriter> requestsWriter = [GRXWriter writerWithValue:[NSData data]];

  GRPCCall *call = [[GRPCCall alloc] initWithHost:@"grpc-test.sandbox.google.com"
                                           method:method
                                   requestsWriter:requestsWriter];

  id<GRXWriteable> responsesWriteable = [[GRXWriteable alloc] initWithValueHandler:^(NSData *value) {
    XCTFail(@"Received unexpected response: %@", value);
  } completionHandler:^(NSError *errorOrNil) {
    XCTAssertNotNil(errorOrNil, @"Finished without error!");
    // TODO(jcanizales): The server should return code 12 UNIMPLEMENTED, not 5 NOT FOUND.
    XCTAssertEqual(errorOrNil.code, 5, @"Finished with unexpected error: %@", errorOrNil);
    [expectation fulfill];
  }];

  [call startWithWriteable:responsesWriteable];

  [self waitForExpectationsWithTimeout:2. handler:nil];
}

- (void)testEmptyRPC {
  __weak XCTestExpectation *response = [self expectationWithDescription:@"Empty response received."];
  __weak XCTestExpectation *completion = [self expectationWithDescription:@"Empty RPC completed."];

  GRPCMethodName *method = [[GRPCMethodName alloc] initWithPackage:@"grpc.testing"
                                                         interface:@"TestService"
                                                            method:@"EmptyCall"];

  id<GRXWriter> requestsWriter = [GRXWriter writerWithValue:[NSData data]];

  GRPCCall *call = [[GRPCCall alloc] initWithHost:@"grpc-test.sandbox.google.com"
                                           method:method
                                   requestsWriter:requestsWriter];

  id<GRXWriteable> responsesWriteable = [[GRXWriteable alloc] initWithValueHandler:^(NSData *value) {
    XCTAssertNotNil(value, @"nil value received as response.");
    XCTAssertEqual([value length], 0, @"Non-empty response received: %@", value);
    [response fulfill];
  } completionHandler:^(NSError *errorOrNil) {
    XCTAssertNil(errorOrNil, @"Finished with unexpected error: %@", errorOrNil);
    [completion fulfill];
  }];

  [call startWithWriteable:responsesWriteable];

  [self waitForExpectationsWithTimeout:2. handler:nil];
}

- (void)testSimpleProtoRPC {
  __weak XCTestExpectation *response = [self expectationWithDescription:@"Response received."];
  __weak XCTestExpectation *expectedResponse =
  [self expectationWithDescription:@"Expected response."];
  __weak XCTestExpectation *completion = [self expectationWithDescription:@"RPC completed."];

  GRPCMethodName *method = [[GRPCMethodName alloc] initWithPackage:@"grpc.testing"
                                                         interface:@"TestService"
                                                            method:@"UnaryCall"];

  RMTSimpleRequest *request = [[RMTSimpleRequest alloc] init];
  request.responseSize = 100;
  request.fillUsername = YES;
  request.fillOauthScope = YES;
  id<GRXWriter> requestsWriter = [GRXWriter writerWithValue:[request data]];

  GRPCCall *call = [[GRPCCall alloc] initWithHost:@"grpc-test.sandbox.google.com"
                                           method:method
                                   requestsWriter:requestsWriter];

  id<GRXWriteable> responsesWriteable = [[GRXWriteable alloc] initWithValueHandler:^(NSData *value) {
    XCTAssertNotNil(value, @"nil value received as response.");
    [response fulfill];
    XCTAssertGreaterThan(value.length, 0, @"Empty response received.");
    RMTSimpleResponse *response = [RMTSimpleResponse parseFromData:value];
    // We expect empty strings, not nil:
    XCTAssertNotNil(response.username, @"Response's username is nil.");
    XCTAssertNotNil(response.oauthScope, @"Response's OAuth scope is nil.");
    [expectedResponse fulfill];
  } completionHandler:^(NSError *errorOrNil) {
    XCTAssertNil(errorOrNil, @"Finished with unexpected error: %@", errorOrNil);
    [completion fulfill];
  }];

  [call startWithWriteable:responsesWriteable];

  [self waitForExpectationsWithTimeout:2. handler:nil];
}

@end