// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "base/message_loop/message_loop.h"
#include "chrome/browser/local_discovery/privet_local_printer_lister.h"
#include "chrome/browser/local_discovery/test_service_discovery_client.h"
#include "net/url_request/test_url_fetcher_factory.h"
#include "net/url_request/url_request_test_util.h"

#include "testing/gmock/include/gmock/gmock.h"
#include "testing/gtest/include/gtest/gtest.h"

using testing::StrictMock;
using testing::_;

namespace local_discovery {

namespace {

const uint8 kAnnouncePacket[] = {
  // Header
  0x00, 0x00,               // ID is zeroed out
  0x80, 0x00,               // Standard query response, no error
  0x00, 0x00,               // No questions (for simplicity)
  0x00, 0x05,               // 5 RR (answers)
  0x00, 0x00,               // 0 authority RRs
  0x00, 0x00,               // 0 additional RRs

  0x08, '_', 'p', 'r', 'i', 'n', 't', 'e', 'r',
  0x04, '_', 's', 'u', 'b',
  0x07, '_', 'p', 'r', 'i', 'v', 'e', 't',
  0x04, '_', 't', 'c', 'p',
  0x05, 'l', 'o', 'c', 'a', 'l',
  0x00,
  0x00, 0x0c,        // TYPE is PTR.
  0x00, 0x01,        // CLASS is IN.
  0x00, 0x00,        // TTL (4 bytes) is 32768 second.
  0x10, 0x00,
  0x00, 0x0c,        // RDLENGTH is 12 bytes.
  0x09, 'm', 'y', 'S', 'e', 'r', 'v', 'i', 'c', 'e',
  0xc0, 0x0c,

  0x09, 'm', 'y', 'S', 'e', 'r', 'v', 'i', 'c', 'e',
  0xc0, 0x0c,
  0x00, 0x10,        // TYPE is TXT.
  0x00, 0x01,        // CLASS is IN.
  0x00, 0x00,        // TTL (4 bytes) is 32768 seconds.
  0x01, 0x00,
  0x00, 0x37,        // RDLENGTH is 55 bytes.
  0x06, 'i', 'd', '=', 'r', 'e', 'g',
  0x10, 't', 'y', '=', 'S', 'a', 'm', 'p', 'l', 'e', ' ',
        'd', 'e', 'v', 'i', 'c', 'e',
  0x1e, 'n', 'o', 't', 'e', '=',
        'S', 'a', 'm', 'p', 'l', 'e', ' ', 'd', 'e', 'v', 'i', 'c', 'e', ' ',
        'd', 'e', 's', 'c', 'r', 'i', 'p', 't', 'i', 'o', 'n',

  0x09, 'm', 'y', 'S', 'e', 'r', 'v', 'i', 'c', 'e',
  0xc0, 0x0c,
  0x00, 0x21,        // Type is SRV
  0x00, 0x01,        // CLASS is IN
  0x00, 0x00,        // TTL (4 bytes) is 32768 second.
  0x10, 0x00,
  0x00, 0x17,        // RDLENGTH is 23
  0x00, 0x00,
  0x00, 0x00,
  0x22, 0xb8,        // port 8888
  0x09, 'm', 'y', 'S', 'e', 'r', 'v', 'i', 'c', 'e',
  0x05, 'l', 'o', 'c', 'a', 'l',
  0x00,

  0x09, 'm', 'y', 'S', 'e', 'r', 'v', 'i', 'c', 'e',
  0x05, 'l', 'o', 'c', 'a', 'l',
  0x00,
  0x00, 0x01,        // Type is A
  0x00, 0x01,        // CLASS is IN
  0x00, 0x00,        // TTL (4 bytes) is 32768 second.
  0x10, 0x00,
  0x00, 0x04,        // RDLENGTH is 4
  0x01, 0x02, 0x03, 0x04,  // 1.2.3.4

  0x09, 'm', 'y', 'S', 'e', 'r', 'v', 'i', 'c', 'e',
  0x05, 'l', 'o', 'c', 'a', 'l',
  0x00,
  0x00, 0x1C,        // Type is AAAA
  0x00, 0x01,        // CLASS is IN
  0x00, 0x00,        // TTL (4 bytes) is 32768 second.
  0x10, 0x00,
  0x00, 0x10,        // RDLENGTH is 16
  0x01, 0x02, 0x03, 0x04,  // 1.2.3.4
  0x01, 0x02, 0x03, 0x04,
  0x01, 0x02, 0x03, 0x04,
  0x01, 0x02, 0x03, 0x04,
};

const char kInfoIsLocalPrinter[] = "{"
    "\"api\" : [ \"/privet/printer/submitdoc\" ],"
    "\"x-privet-token\" : \"sample\""
    "}";

const char kInfoIsNotLocalPrinter[] = "{"
    "\"api\" : [ \"/privet/register\" ],"
    "\"x-privet-token\" : \"sample\""
    "}";

const char kServiceName[] = "myService._printer._sub._privet._tcp.local";

const char kPrivetInfoURL[] = "http://1.2.3.4:8888/privet/info";

class MockLocalPrinterListerDelegate
    : public PrivetLocalPrinterLister::Delegate {
 public:
  MockLocalPrinterListerDelegate() {
  }

  virtual ~MockLocalPrinterListerDelegate() {
  }

  MOCK_METHOD4(LocalPrinterChanged, void(bool added,
                                         const std::string& name,
                                         bool has_local_printing,
                                         const DeviceDescription& description));

  MOCK_METHOD1(LocalPrinterRemoved, void(const std::string& name));

  MOCK_METHOD0(LocalPrinterCacheFlushed, void());
};

class PrivetLocalPrinterListerTest : public testing::Test {
 public:
  PrivetLocalPrinterListerTest() {
    test_service_discovery_client_ = new TestServiceDiscoveryClient();
    test_service_discovery_client_->Start();
    url_request_context_ = new net::TestURLRequestContextGetter(
        base::MessageLoopProxy::current());
    local_printer_lister_.reset(new PrivetLocalPrinterLister(
        test_service_discovery_client_.get(),
        url_request_context_.get(),
        &delegate_));
  }

  ~PrivetLocalPrinterListerTest() {
  }

  bool SuccessfulResponseToURL(const GURL& url,
                               const std::string& response) {
    net::TestURLFetcher* fetcher = fetcher_factory_.GetFetcherByID(0);
    EXPECT_TRUE(fetcher);
    EXPECT_EQ(url, fetcher->GetOriginalURL());

    if (!fetcher || url != fetcher->GetOriginalURL())
      return false;

    fetcher->SetResponseString(response);
    fetcher->set_status(net::URLRequestStatus(net::URLRequestStatus::SUCCESS,
                                              net::OK));
    fetcher->set_response_code(200);
    fetcher->delegate()->OnURLFetchComplete(fetcher);
    return true;
  }

  void SimulateReceive(const uint8* packet, size_t size) {
    test_service_discovery_client_->SimulateReceive(packet, size);
    message_loop_.RunUntilIdle();
  }

  void ExpectAnyPacket() {
    EXPECT_CALL(*test_service_discovery_client_, OnSendTo(_))
        .Times(2);
  }

 protected:
  base::MessageLoop message_loop_;
  scoped_refptr<TestServiceDiscoveryClient> test_service_discovery_client_;
  scoped_refptr<net::TestURLRequestContextGetter> url_request_context_;
  scoped_ptr<PrivetLocalPrinterLister> local_printer_lister_;
  net::TestURLFetcherFactory fetcher_factory_;
  StrictMock<MockLocalPrinterListerDelegate> delegate_;
};

TEST_F(PrivetLocalPrinterListerTest, PrinterAddedTest) {
  ExpectAnyPacket();

  local_printer_lister_->Start();

  SimulateReceive(kAnnouncePacket, sizeof(kAnnouncePacket));

  EXPECT_CALL(delegate_, LocalPrinterChanged(true, kServiceName, true, _));

  EXPECT_TRUE(SuccessfulResponseToURL(
      GURL(kPrivetInfoURL),
      std::string(kInfoIsLocalPrinter)));
};

TEST_F(PrivetLocalPrinterListerTest, NonPrinterAddedTest) {
  ExpectAnyPacket();

  local_printer_lister_->Start();

  SimulateReceive(kAnnouncePacket, sizeof(kAnnouncePacket));

  EXPECT_CALL(delegate_, LocalPrinterChanged(true, kServiceName, false, _));

  EXPECT_TRUE(SuccessfulResponseToURL(
      GURL(kPrivetInfoURL),
      std::string(kInfoIsNotLocalPrinter)));
};

}  // namespace

}  // namespace local_discovery