// 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/autofill/core/browser/legal_message_line.h"

#include <string>
#include <utility>

#include "base/json/json_reader.h"
#include "base/memory/scoped_ptr.h"
#include "base/strings/utf_string_conversions.h"
#include "base/values.h"
#include "testing/gmock/include/gmock/gmock.h"
#include "testing/gtest/include/gtest/gtest.h"

namespace autofill {

using Link = LegalMessageLine::Link;

// A legal message line that allows for modifications.
class TestLegalMessageLine : public LegalMessageLine {
 public:
  TestLegalMessageLine() {}

  TestLegalMessageLine(const std::string& ascii_text) { set_text(ascii_text); }

  TestLegalMessageLine(const std::string& ascii_text,
                       const std::vector<Link>& links) {
    set_text(ascii_text);
    set_links(links);
  }

  ~TestLegalMessageLine() override {}

  void set_text(const std::string& ascii_text) {
    text_ = base::ASCIIToUTF16(ascii_text);
  }

  void set_links(const std::vector<Link>& links) { links_ = links; }

 private:
  DISALLOW_COPY_AND_ASSIGN(TestLegalMessageLine);
};

// A test case.
struct TestCase {
  std::string message_json;
  LegalMessageLines expected_lines;
};

// Prints out a legal message |line| to |os|.
std::ostream& operator<<(std::ostream& os, const LegalMessageLine& line) {
  os << "{text: '" << line.text() << "', links: [";
  for (const Link& link : line.links()) {
    os << "{range: (" << link.range.start() << ", " << link.range.end()
       << "), url: '" << link.url << "'}";
  }

  os << "]}";
  return os;
}

// Prints out legal message |lines| to |os|.
std::ostream& operator<<(std::ostream& os, const LegalMessageLines& lines) {
  os << "[";
  for (const LegalMessageLine& line : lines)
    os << line;

  os << "]";
  return os;
}

// Prints out |test_case| to |os|.
std::ostream& operator<<(std::ostream& os, const TestCase& test_case) {
  os << "{message_json: '" << test_case.message_json
     << "', expected_lines: " << test_case.expected_lines << "}";
  return os;
}

// Compares two legal message lines |lhs| and |rhs|.
bool operator==(const LegalMessageLine& lhs, const LegalMessageLine& rhs) {
  if (lhs.text() != rhs.text() || lhs.links().size() != rhs.links().size())
    return false;

  for (size_t i = 0; i < lhs.links().size(); ++i) {
    if (lhs.links()[i].range != rhs.links()[i].range)
      return false;

    if (lhs.links()[i].url != rhs.links()[i].url)
      return false;
  }

  return true;
}

class LegalMessageLineTest : public ::testing::TestWithParam<TestCase> {
 public:
  LegalMessageLineTest() {}
  ~LegalMessageLineTest() override {}
};

// Verifies that legal message parsing is correct.
TEST_P(LegalMessageLineTest, Parsing) {
  scoped_ptr<base::Value> value(
      base::JSONReader::Read(GetParam().message_json));
  ASSERT_TRUE(value);
  base::DictionaryValue* dictionary = nullptr;
  EXPECT_TRUE(value->GetAsDictionary(&dictionary));
  ASSERT_TRUE(dictionary);
  LegalMessageLines actual_lines;
  LegalMessageLine::Parse(*dictionary, &actual_lines);

  EXPECT_EQ(GetParam().expected_lines, actual_lines);
};

INSTANTIATE_TEST_CASE_P(
    TestCases,
    LegalMessageLineTest,
    testing::Values(
        TestCase{"{"
                 "  \"line\" : [ {"
                 "     \"template\": \"This is the entire message.\""
                 "  } ]"
                 "}",
                 {TestLegalMessageLine("This is the entire message.")}},
        TestCase{
            "{"
            "  \"line\" : [ {"
            "     \"template\": \"Panda {0}.\","
            "     \"template_parameter\": [ {"
            "        \"display_text\": \"bears are fuzzy\","
            "        \"url\": \"http://www.example.com\""
            "     } ]"
            "  } ]"
            "}",
            {TestLegalMessageLine{"Panda bears are fuzzy.",
                                  {Link(6, 21, "http://www.example.com")}}}},
        // Legal message is invalid, so lines should be empty.
        TestCase{"{"
                 "  \"line\" : [ {"
                 "     \"template\": \"Panda {0}.\","
                 "     \"template_parameter\": [ {"
                 "        \"display_text\": \"bear\""
                 "     } ]"
                 "  } ]"
                 "}",
                 LegalMessageLines()},
        TestCase{"{"
                 "  \"line\" : [ {"
                 "    \"template\": \"Panda {0}.\","
                 "    \"template_parameter\": [ {"
                 "      \"url\": \"http://www.example.com\""
                 "     } ]"
                 "  } ]"
                 "}",
                 // Legal message is invalid, so lines should be empty.
                 LegalMessageLines()},
        TestCase{
            "{"
            "  \"line\" : [ {"
            "    \"template\": \"Panda '{'{0}'}' '{1}' don't $1.\","
            "    \"template_parameter\": [ {"
            "      \"display_text\": \"bears\","
            "      \"url\": \"http://www.example.com\""
            "     } ]"
            "  } ]"
            "}",
            {TestLegalMessageLine("Panda {bears} {1} don't $1.",
                                  {Link(7, 12, "http://www.example.com")})}},
        // Consecutive dollar signs do not expand correctly (see comment in
        // ReplaceTemplatePlaceholders() in legal_message_line.cc). If this is
        // fixed and this test starts to fail, please update the "Caveats"
        // section of the LegalMessageLine::Parse() header file comment.
        TestCase{"{"
                 "  \"line\" : [ {"
                 "     \"template\": \"$$\""
                 "  } ]"
                 "}",
                 {TestLegalMessageLine("$$$")}},
        // "${" does not expand correctly (see comment in
        // ReplaceTemplatePlaceholders() in legal_message_line.cc). If this is
        // fixed and this test starts to fail, please update the "Caveats"
        // section of the LegalMessageLine::Parse() header file comment.
        TestCase{"{"
                 "  \"line\" : [ {"
                 "    \"template\": \"${0}\","
                 "    \"template_parameter\": [ {"
                 "      \"display_text\": \"bears\","
                 "      \"url\": \"http://www.example.com\""
                 "    } ]"
                 "  } ]"
                 "}",
                 LegalMessageLines()},
        TestCase{
            "{"
            "  \"line\" : [ {"
            "    \"template\": \"Panda {0} like {2} eat {1}.\","
            "    \"template_parameter\": [ {"
            "      \"display_text\": \"bears\","
            "      \"url\": \"http://www.example.com/0\""
            "    }, {"
            "      \"display_text\": \"bamboo\","
            "      \"url\": \"http://www.example.com/1\""
            "    }, {"
            "      \"display_text\": \"to\","
            "      \"url\": \"http://www.example.com/2\""
            "    } ]"
            "  } ]"
            "}",
            {TestLegalMessageLine("Panda bears like to eat bamboo.",
                                  {Link(6, 11, "http://www.example.com/0"),
                                   Link(24, 30, "http://www.example.com/1"),
                                   Link(17, 19, "http://www.example.com/2")})}},
        TestCase{"{"
                 "  \"line\" : [ {"
                 "    \"template\": \"Panda {0}\","
                 "    \"template_parameter\": [ {"
                 "      \"display_text\": \"bears\","
                 "      \"url\": \"http://www.example.com/line_0_param_0\""
                 "    } ]"
                 "  }, {"
                 "    \"template\": \"like {1} eat {0}.\","
                 "    \"template_parameter\": [ {"
                 "      \"display_text\": \"bamboo\","
                 "      \"url\": \"http://www.example.com/line_1_param_0\""
                 "    }, {"
                 "      \"display_text\": \"to\","
                 "      \"url\": \"http://www.example.com/line_1_param_1\""
                 "    } ]"
                 "  }, {"
                 "    \"template\": \"The {0}.\","
                 "    \"template_parameter\": [ {"
                 "      \"display_text\": \"end\","
                 "      \"url\": \"http://www.example.com/line_2_param_0\""
                 "    } ]"
                 "  } ]"
                 "}",
                 {TestLegalMessageLine(
                      "Panda bears",
                      {Link(6, 11, "http://www.example.com/line_0_param_0")}),
                  TestLegalMessageLine(
                      "like to eat bamboo.",
                      {Link(12, 18, "http://www.example.com/line_1_param_0"),
                       Link(5, 7, "http://www.example.com/line_1_param_1")}),
                  TestLegalMessageLine(
                      "The end.",
                      {Link(4, 7, "http://www.example.com/line_2_param_0")})

                 }},
        TestCase{
            "{"
            "  \"line\" : [ {"
            "    \"template\": \"Panda {0}\nlike {2} eat {1}.\nThe {3}.\","
            "    \"template_parameter\": [ {"
            "      \"display_text\": \"bears\","
            "      \"url\": \"http://www.example.com/0\""
            "    }, {"
            "      \"display_text\": \"bamboo\","
            "      \"url\": \"http://www.example.com/1\""
            "    }, {"
            "      \"display_text\": \"to\","
            "      \"url\": \"http://www.example.com/2\""
            "    }, {"
            "      \"display_text\": \"end\","
            "      \"url\": \"http://www.example.com/3\""
            "    } ]"
            "  } ]"
            "}",
            {TestLegalMessageLine("Panda bears\nlike to eat bamboo.\nThe end.",
                                  {Link(6, 11, "http://www.example.com/0"),
                                   Link(24, 30, "http://www.example.com/1"),
                                   Link(17, 19, "http://www.example.com/2"),
                                   Link(36, 39, "http://www.example.com/3")})}},
        TestCase{"{"
                 "  \"line\" : [ {"
                 "    \"template\": \"a{0} b{1} c{2} d{3} e{4} f{5} g{6}\","
                 "    \"template_parameter\": [ {"
                 "      \"display_text\": \"A\","
                 "      \"url\": \"http://www.example.com/0\""
                 "    }, {"
                 "      \"display_text\": \"B\","
                 "      \"url\": \"http://www.example.com/1\""
                 "    }, {"
                 "      \"display_text\": \"C\","
                 "      \"url\": \"http://www.example.com/2\""
                 "    }, {"
                 "      \"display_text\": \"D\","
                 "      \"url\": \"http://www.example.com/3\""
                 "    }, {"
                 "      \"display_text\": \"E\","
                 "      \"url\": \"http://www.example.com/4\""
                 "    }, {"
                 "      \"display_text\": \"F\","
                 "      \"url\": \"http://www.example.com/5\""
                 "    }, {"
                 "      \"display_text\": \"G\","
                 "      \"url\": \"http://www.example.com/6\""
                 "    } ]"
                 "  } ]"
                 "}",
                 {TestLegalMessageLine(
                     "aA bB cC dD eE fF gG",
                     {Link(1, 2, "http://www.example.com/0"),
                      Link(4, 5, "http://www.example.com/1"),
                      Link(7, 8, "http://www.example.com/2"),
                      Link(10, 11, "http://www.example.com/3"),
                      Link(13, 14, "http://www.example.com/4"),
                      Link(16, 17, "http://www.example.com/5"),
                      Link(19, 20, "http://www.example.com/6")})}}));

}  // namespace autofill