// Copyright 2016 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 "components/ntp_snippets/remote/remote_suggestion.h"

#include <utility>

#include "base/json/json_reader.h"
#include "base/strings/utf_string_conversions.h"
#include "base/time/time.h"
#include "base/values.h"
#include "components/ntp_snippets/remote/proto/ntp_snippets.pb.h"
#include "components/ntp_snippets/time_serialization.h"
#include "testing/gmock/include/gmock/gmock.h"
#include "testing/gtest/include/gtest/gtest.h"

namespace ntp_snippets {
namespace {

using ::testing::ElementsAre;
using ::testing::Eq;
using ::testing::IsNull;
using ::testing::NotNull;

SnippetProto TestSnippetProto() {
  SnippetProto proto;
  proto.add_ids("foo");
  proto.add_ids("bar");
  proto.set_title("a suggestion title");
  proto.set_snippet("the snippet describing the suggestion.");
  proto.set_salient_image_url("http://google.com/logo/");
  proto.set_image_dominant_color(4289379276);
  proto.set_publish_date(1476095492);
  proto.set_expiry_date(1476354691);
  proto.set_score(1.5f);
  proto.set_dismissed(false);
  proto.set_remote_category_id(1);
  proto.set_fetch_date(1476364691);
  proto.set_content_type(SnippetProto_ContentType_VIDEO);
  auto* source = proto.mutable_source();
  source->set_url("http://cool-suggestions.com/");
  source->set_publisher_name("Great Suggestions Inc.");
  source->set_amp_url("http://cdn.ampproject.org/c/foo/");
  proto.set_rank(7);
  return proto;
}

base::DictionaryValue TestSnippetJsonValue() {
  const char kJsonStr[] = R"(
    {
      "ids" : ["foo", "bar"],
      "title" : "a suggestion title",
      "snippet" : "the snippet describing the suggestion.",
      "fullPageUrl" : "http://cool-suggestions.com/",
      "creationTime" : "2016-06-30T11:01:37.000Z",
      "expirationTime" : "2016-07-01T11:01:37.000Z",
      "attribution" : "Great Suggestions Inc.",
      "imageUrl" : "http://google.com/logo/",
      "ampUrl" : "http://cdn.ampproject.org/c/foo/",
      "faviconUrl" : "http://localhost/favicon.ico",
      "score": 1.5,
      "notificationInfo": {
        "shouldNotify": true,
        "deadline": "2016-06-30T13:01:37.000Z"
      },
      "imageDominantColor": 4289379276
    }
  )";

  auto json_parsed = base::JSONReader::ReadAndReturnValueWithError(
      kJsonStr, base::JSON_PARSE_RFC);
  CHECK(json_parsed.value) << "error_message: " << json_parsed.error_message;
  auto dict = base::DictionaryValue::From(
      std::make_unique<base::Value>(std::move(json_parsed).value.value()));
  return std::move(*dict);
}

TEST(RemoteSuggestionTest, FromContentSuggestionsDictionary) {
  base::DictionaryValue snippet_dict = TestSnippetJsonValue();
  const base::Time fetch_date = DeserializeTime(1466634774L);
  std::unique_ptr<RemoteSuggestion> snippet =
      RemoteSuggestion::CreateFromContentSuggestionsDictionary(
          snippet_dict, kArticlesRemoteId, fetch_date);
  ASSERT_THAT(snippet, NotNull());

  EXPECT_EQ(snippet->id(), "foo");
  EXPECT_THAT(snippet->GetAllIDs(), ElementsAre("foo", "bar"));
  EXPECT_EQ(snippet->title(), "a suggestion title");
  EXPECT_EQ(snippet->snippet(), "the snippet describing the suggestion.");
  EXPECT_EQ(snippet->salient_image_url(), GURL("http://google.com/logo/"));
  ASSERT_TRUE(snippet->optional_image_dominant_color().has_value());
  EXPECT_EQ(*snippet->optional_image_dominant_color(), 4289379276u);
  EXPECT_EQ(1.5, snippet->score());
  auto unix_publish_date = snippet->publish_date() - base::Time::UnixEpoch();
  auto expiry_duration = snippet->expiry_date() - snippet->publish_date();
  EXPECT_FLOAT_EQ(unix_publish_date.InSecondsF(), 1467284497.000000f);
  EXPECT_FLOAT_EQ(expiry_duration.InSecondsF(), 86400.000000f);

  EXPECT_EQ(snippet->publisher_name(), "Great Suggestions Inc.");
  EXPECT_EQ(snippet->url(), GURL("http://cool-suggestions.com/"));
  EXPECT_EQ(snippet->amp_url(), GURL("http://cdn.ampproject.org/c/foo/"));

  EXPECT_TRUE(snippet->should_notify());
  auto notification_duration =
      snippet->notification_deadline() - snippet->publish_date();
  EXPECT_EQ(7200.0f, notification_duration.InSecondsF());
  EXPECT_EQ(fetch_date, snippet->fetch_date());
}

TEST(RemoteSuggestionTest,
     FromContentSuggestionsDictionaryWithoutImageOrSnippet) {
  base::DictionaryValue snippet_dict = TestSnippetJsonValue();
  ASSERT_TRUE(snippet_dict.RemovePath("imageUrl"));
  ASSERT_TRUE(snippet_dict.RemovePath("snippet"));
  const base::Time fetch_date = DeserializeTime(1466634774L);
  std::unique_ptr<RemoteSuggestion> snippet =
      RemoteSuggestion::CreateFromContentSuggestionsDictionary(
          snippet_dict, kArticlesRemoteId, fetch_date);
  ASSERT_THAT(snippet, NotNull());

  EXPECT_EQ(GURL(), snippet->salient_image_url());
  EXPECT_EQ("", snippet->snippet());
}

TEST(RemoteSuggestionTest, CreateFromProtoToProtoRoundtrip) {
  SnippetProto proto = TestSnippetProto();

  std::unique_ptr<RemoteSuggestion> snippet =
      RemoteSuggestion::CreateFromProto(proto);
  ASSERT_THAT(snippet, NotNull());
  // The snippet database relies on the fact that the first id in the protocol
  // buffer is considered the unique id.
  EXPECT_EQ(snippet->id(), "foo");
  // Unfortunately, we only have MessageLite protocol buffers in Chrome, so
  // comparing via DebugString() or MessageDifferencer is not working.
  // So we either need to compare field-by-field (maintenance heavy) or
  // compare the binary version (unusable diagnostic). Deciding for the latter.
  std::string proto_serialized, round_tripped_serialized;
  proto.SerializeToString(&proto_serialized);
  snippet->ToProto().SerializeToString(&round_tripped_serialized);
  EXPECT_EQ(proto_serialized, round_tripped_serialized);
}

TEST(RemoteSuggestionTest, CreateFromProtoIgnoreMissingFetchDate) {
  SnippetProto proto = TestSnippetProto();
  proto.clear_fetch_date();

  std::unique_ptr<RemoteSuggestion> snippet =
      RemoteSuggestion::CreateFromProto(proto);
  ASSERT_THAT(snippet, NotNull());
  EXPECT_EQ(snippet->fetch_date(), base::Time());
}

TEST(RemoteSuggestionTest, CreateFromProtoIgnoreMissingImageDominantColor) {
  SnippetProto proto = TestSnippetProto();
  proto.clear_image_dominant_color();
  std::unique_ptr<RemoteSuggestion> snippet =
      RemoteSuggestion::CreateFromProto(proto);
  ASSERT_THAT(snippet, NotNull());
  // The snippet database relies on the fact that the first id in the protocol
  // buffer is considered the unique id.
  EXPECT_EQ(snippet->id(), "foo");
  EXPECT_FALSE(snippet->optional_image_dominant_color().has_value());
}

TEST(RemoteSuggestionTest, CreateFromProtoIgnoreMissingSalientImageAndSnippet) {
  SnippetProto proto = TestSnippetProto();
  proto.clear_salient_image_url();
  proto.clear_snippet();
  std::unique_ptr<RemoteSuggestion> snippet =
      RemoteSuggestion::CreateFromProto(proto);
  ASSERT_THAT(snippet, NotNull());
  // The snippet database relies on the fact that the first id in the protocol
  // buffer is considered the unique id.
  EXPECT_EQ(snippet->id(), "foo");
  EXPECT_EQ(GURL(), snippet->salient_image_url());
  EXPECT_EQ("", snippet->snippet());
}

TEST(RemoteSuggestionTest, NotifcationInfoAllSpecified) {
  auto json = TestSnippetJsonValue();
  json.SetBoolean("notificationInfo.shouldNotify", true);
  json.SetString("notificationInfo.deadline", "2016-06-30T13:01:37.000Z");
  auto snippet = RemoteSuggestion::CreateFromContentSuggestionsDictionary(
      json, 0, base::Time());
  EXPECT_TRUE(snippet->should_notify());
  EXPECT_EQ(7200.0f,
            (snippet->notification_deadline() - snippet->publish_date())
                .InSecondsF());
}

TEST(RemoteSuggestionTest, NotificationInfoDeadlineInvalid) {
  auto json = TestSnippetJsonValue();
  json.SetBoolean("notificationInfo.shouldNotify", true);
  json.SetString("notificationInfo.deadline", "abcd");
  auto snippet = RemoteSuggestion::CreateFromContentSuggestionsDictionary(
      json, 0, base::Time());
  EXPECT_TRUE(snippet->should_notify());
  EXPECT_EQ(base::Time::Max(), snippet->notification_deadline());
}

TEST(RemoteSuggestionTest, NotificationInfoDeadlineAbsent) {
  auto json = TestSnippetJsonValue();
  json.SetBoolean("notificationInfo.shouldNotify", true);
  json.RemovePath("notificationInfo.deadline");
  auto snippet = RemoteSuggestion::CreateFromContentSuggestionsDictionary(
      json, 0, base::Time());
  EXPECT_TRUE(snippet->should_notify());
  EXPECT_EQ(base::Time::Max(), snippet->notification_deadline());
}

TEST(RemoteSuggestionTest, NotificationInfoShouldNotifyInvalid) {
  auto json = TestSnippetJsonValue();
  json.SetString("notificationInfo.shouldNotify", "non-bool");
  auto snippet = RemoteSuggestion::CreateFromContentSuggestionsDictionary(
      json, 0, base::Time());
  EXPECT_FALSE(snippet->should_notify());
}

TEST(RemoteSuggestionTest, NotificationInfoAbsent) {
  auto json = TestSnippetJsonValue();
  json.SetBoolean("notificationInfo.shouldNotify", false);
  auto snippet = RemoteSuggestion::CreateFromContentSuggestionsDictionary(
      json, 0, base::Time());
  EXPECT_FALSE(snippet->should_notify());
}

TEST(RemoteSuggestionTest, ToContentSuggestionWithoutNotificationInfo) {
  auto json = TestSnippetJsonValue();
  json.RemovePath("notificationInfo");
  const base::Time fetch_date = DeserializeTime(1466634774L);
  auto snippet = RemoteSuggestion::CreateFromContentSuggestionsDictionary(
      json, 0, fetch_date);
  ASSERT_THAT(snippet, NotNull());
  ContentSuggestion sugg = snippet->ToContentSuggestion(
      Category::FromKnownCategory(KnownCategories::ARTICLES));

  EXPECT_THAT(sugg.id().category(),
              Eq(Category::FromKnownCategory(KnownCategories::ARTICLES)));
  EXPECT_THAT(sugg.id().id_within_category(), Eq("foo"));
  EXPECT_THAT(sugg.url(), Eq(GURL("http://cdn.ampproject.org/c/foo/")));
  EXPECT_THAT(sugg.title(), Eq(u"a suggestion title"));
  EXPECT_THAT(sugg.snippet_text(),
              Eq(u"the snippet describing the suggestion."));
  EXPECT_THAT(sugg.publish_date().ToJavaTime(), Eq(1467284497000));
  EXPECT_THAT(sugg.publisher_name(), Eq(u"Great Suggestions Inc."));
  EXPECT_THAT(sugg.score(), Eq(1.5));
  EXPECT_THAT(sugg.salient_image_url(), Eq(GURL("http://google.com/logo/")));
  EXPECT_THAT(sugg.notification_extra(), IsNull());
  EXPECT_THAT(sugg.fetch_date(), Eq(fetch_date));
}

TEST(RemoteSuggestionTest, ToContentSuggestionWithNotificationInfo) {
  auto json = TestSnippetJsonValue();
  auto snippet = RemoteSuggestion::CreateFromContentSuggestionsDictionary(
      json, 0, base::Time());
  ASSERT_THAT(snippet, NotNull());
  ContentSuggestion sugg = snippet->ToContentSuggestion(
      Category::FromKnownCategory(KnownCategories::ARTICLES));

  EXPECT_THAT(sugg.id().category(),
              Eq(Category::FromKnownCategory(KnownCategories::ARTICLES)));
  EXPECT_THAT(sugg.id().id_within_category(), Eq("foo"));
  EXPECT_THAT(sugg.url(), Eq(GURL("http://cdn.ampproject.org/c/foo/")));
  EXPECT_THAT(sugg.title(), Eq(u"a suggestion title"));
  EXPECT_THAT(sugg.snippet_text(),
              Eq(u"the snippet describing the suggestion."));
  EXPECT_THAT(sugg.publish_date().ToJavaTime(), Eq(1467284497000));
  EXPECT_THAT(sugg.publisher_name(), Eq(u"Great Suggestions Inc."));
  EXPECT_THAT(sugg.score(), Eq(1.5));
  ASSERT_THAT(sugg.notification_extra(), NotNull());
  EXPECT_THAT(sugg.notification_extra()->deadline.ToJavaTime(),
              Eq(1467291697000));
}

TEST(RemoteSuggestionTest, ToContentSuggestionWithContentTypeVideo) {
  auto json = TestSnippetJsonValue();
  json.SetString("contentType", "VIDEO");
  auto snippet = RemoteSuggestion::CreateFromContentSuggestionsDictionary(
      json, 0, base::Time());
  ASSERT_THAT(snippet, NotNull());
  ContentSuggestion content_suggestion = snippet->ToContentSuggestion(
      Category::FromKnownCategory(KnownCategories::ARTICLES));

  EXPECT_THAT(content_suggestion.is_video_suggestion(), Eq(true));
}

TEST(RemoteSuggestionTest, ToContentSuggestionWithContentTypeUnknown) {
  auto json = TestSnippetJsonValue();
  json.SetString("contentType", "UNKNOWN");
  auto snippet = RemoteSuggestion::CreateFromContentSuggestionsDictionary(
      json, 0, base::Time());
  ASSERT_THAT(snippet, NotNull());
  ContentSuggestion content_suggestion = snippet->ToContentSuggestion(
      Category::FromKnownCategory(KnownCategories::ARTICLES));

  EXPECT_THAT(content_suggestion.is_video_suggestion(), Eq(false));
}

TEST(RemoteSuggestionTest, ToContentSuggestionWithMissingContentType) {
  auto json = TestSnippetJsonValue();
  auto snippet = RemoteSuggestion::CreateFromContentSuggestionsDictionary(
      json, 0, base::Time());
  ASSERT_THAT(snippet, NotNull());
  ContentSuggestion content_suggestion = snippet->ToContentSuggestion(
      Category::FromKnownCategory(KnownCategories::ARTICLES));

  EXPECT_THAT(content_suggestion.is_video_suggestion(), Eq(false));
}

TEST(RemoteSuggestionTest, ToContentSuggestionWithLargeImageDominantColor) {
  auto json = TestSnippetJsonValue();
  // JSON does not support unsigned types. As a result the value is parsed as
  // int if it fits and as double otherwise.
  json.SetDouble("imageDominantColor", 4289379276.);
  auto snippet = RemoteSuggestion::CreateFromContentSuggestionsDictionary(
      json, 0, base::Time());
  ASSERT_THAT(snippet, NotNull());
  ContentSuggestion content_suggestion = snippet->ToContentSuggestion(
      Category::FromKnownCategory(KnownCategories::ARTICLES));

  ASSERT_TRUE(content_suggestion.optional_image_dominant_color().has_value());
  EXPECT_THAT(*content_suggestion.optional_image_dominant_color(),
              Eq(4289379276u));
}

TEST(RemoteSuggestionTest, ToContentSuggestionWithSmallImageDominantColor) {
  auto json = TestSnippetJsonValue();
  // JSON does not support unsigned types. As a result the value is parsed as
  // int if it fits and as double otherwise.
  json.SetInteger("imageDominantColor", 16777216 /*=0x1000000*/);
  auto snippet = RemoteSuggestion::CreateFromContentSuggestionsDictionary(
      json, 0, base::Time());
  ASSERT_THAT(snippet, NotNull());
  ContentSuggestion content_suggestion = snippet->ToContentSuggestion(
      Category::FromKnownCategory(KnownCategories::ARTICLES));

  ASSERT_TRUE(content_suggestion.optional_image_dominant_color().has_value());
  EXPECT_THAT(*content_suggestion.optional_image_dominant_color(),
              Eq(16777216u));
}

TEST(RemoteSuggestionTest, ToContentSuggestionWithoutImageDominantColor) {
  auto json = TestSnippetJsonValue();
  json.RemovePath("imageDominantColor");
  auto snippet = RemoteSuggestion::CreateFromContentSuggestionsDictionary(
      json, 0, base::Time());
  ASSERT_THAT(snippet, NotNull());
  ContentSuggestion content_suggestion = snippet->ToContentSuggestion(
      Category::FromKnownCategory(KnownCategories::ARTICLES));

  EXPECT_FALSE(content_suggestion.optional_image_dominant_color().has_value());
}

}  // namespace
}  // namespace ntp_snippets