/*
 * Copyright (c) 2011-2019, The DART development contributors
 * All rights reserved.
 *
 * The list of contributors can be found at:
 *   https://github.com/dartsim/dart/blob/master/LICENSE
 *
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 *   without modification, are permitted provided that the following
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 *     notice, this list of conditions and the following disclaimer.
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 *     disclaimer in the documentation and/or other materials provided
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#include <gtest/gtest.h>
#include "dart/common/Uri.hpp"
#include "TestHelpers.hpp"

using dart::common::Uri;

TEST(UriHelpers, fromString_ValidUri_ReturnsTrue)
{
  // These examples are from Section 1.1.2 of RFC 3986.
  Uri uri;

  ASSERT_TRUE(uri.fromString("ftp://ftp.is.co.za/rfc/rfc1808.txt"));
  ASSERT_TRUE(uri.mScheme);
  ASSERT_TRUE(uri.mAuthority);
  ASSERT_TRUE(uri.mPath);
  EXPECT_FALSE(uri.mQuery);
  EXPECT_FALSE(uri.mFragment);
  EXPECT_EQ("ftp", *uri.mScheme);
  EXPECT_EQ("ftp.is.co.za", *uri.mAuthority);
  EXPECT_EQ("/rfc/rfc1808.txt", *uri.mPath);

  ASSERT_TRUE(uri.fromString("http://www.ietf.org/rfc/rfc2396.txt"));
  ASSERT_TRUE(uri.mScheme);
  ASSERT_TRUE(uri.mAuthority);
  ASSERT_TRUE(uri.mPath);
  EXPECT_FALSE(uri.mQuery);
  EXPECT_FALSE(uri.mFragment);
  EXPECT_EQ("http", *uri.mScheme);
  EXPECT_EQ("www.ietf.org", *uri.mAuthority);
  EXPECT_EQ("/rfc/rfc2396.txt", *uri.mPath);

  ASSERT_TRUE(uri.fromString("ldap://[2001:db8::7]/c=GB?objectClass?one"));
  ASSERT_TRUE(uri.mScheme);
  ASSERT_TRUE(uri.mAuthority);
  ASSERT_TRUE(uri.mPath);
  ASSERT_TRUE(uri.mQuery);
  EXPECT_FALSE(uri.mFragment);
  EXPECT_EQ("ldap", *uri.mScheme);
  EXPECT_EQ("[2001:db8::7]", *uri.mAuthority);
  EXPECT_EQ("/c=GB", *uri.mPath);
  EXPECT_EQ("objectClass?one", *uri.mQuery);

  ASSERT_TRUE(uri.fromString("mailto:John.Doe@example.com"));
  ASSERT_TRUE(uri.mScheme);
  ASSERT_FALSE(uri.mAuthority);
  ASSERT_TRUE(uri.mPath);
  ASSERT_FALSE(uri.mQuery);
  EXPECT_FALSE(uri.mFragment);
  EXPECT_EQ("mailto", *uri.mScheme);
  EXPECT_EQ("John.Doe@example.com", *uri.mPath);

  ASSERT_TRUE(uri.fromString("news:comp.infosystems.www.servers.unix"));
  ASSERT_TRUE(uri.mScheme);
  ASSERT_FALSE(uri.mAuthority);
  ASSERT_TRUE(uri.mPath);
  ASSERT_FALSE(uri.mQuery);
  EXPECT_FALSE(uri.mFragment);
  EXPECT_EQ("news", *uri.mScheme);
  EXPECT_EQ("comp.infosystems.www.servers.unix", *uri.mPath);

  ASSERT_TRUE(uri.fromString("tel:+1-816-555-1212"));
  ASSERT_TRUE(uri.mScheme);
  ASSERT_FALSE(uri.mAuthority);
  ASSERT_TRUE(uri.mPath);
  ASSERT_FALSE(uri.mQuery);
  EXPECT_FALSE(uri.mFragment);
  EXPECT_EQ("tel", *uri.mScheme);
  EXPECT_EQ("+1-816-555-1212", *uri.mPath);

  ASSERT_TRUE(uri.fromString("telnet://192.0.2.16:80/"));
  ASSERT_TRUE(uri.mScheme);
  ASSERT_TRUE(uri.mAuthority);
  ASSERT_TRUE(uri.mPath);
  ASSERT_FALSE(uri.mQuery);
  EXPECT_FALSE(uri.mFragment);
  EXPECT_EQ("telnet", *uri.mScheme);
  EXPECT_EQ("192.0.2.16:80", *uri.mAuthority);
  EXPECT_EQ("/", *uri.mPath);

  ASSERT_TRUE(
      uri.fromString("urn:oasis:names:specification:docbook:dtd:xml:4.1.2"));
  ASSERT_TRUE(uri.mScheme);
  ASSERT_FALSE(uri.mAuthority);
  ASSERT_TRUE(uri.mPath);
  ASSERT_FALSE(uri.mQuery);
  EXPECT_FALSE(uri.mFragment);
  EXPECT_FALSE(uri.mAuthority);
  EXPECT_EQ("oasis:names:specification:docbook:dtd:xml:4.1.2", *uri.mPath);
}

TEST(UriHelpers, fromPath_PathNotUri_ReturnsFileURIwithEmptyAuthority)
{
#ifdef _WIN32
  std::vector<std::string> testPaths = {
      "C:\\foo",
      "C:\\foo\\",
      "C:\\foo\\bar",
  };
#else
  std::vector<std::string> testPaths = {"/foo", "/foo/", "/foo/bar"};
#endif

  Uri uri;

  ASSERT_TRUE(uri.fromPath(testPaths[0]));
  ASSERT_TRUE(uri.mScheme);
  ASSERT_TRUE(uri.mAuthority);
  ASSERT_TRUE(uri.mPath);
  ASSERT_FALSE(uri.mQuery);
  EXPECT_FALSE(uri.mFragment);
  EXPECT_EQ("file", *uri.mScheme);
  EXPECT_EQ("", *uri.mAuthority);
  EXPECT_EQ(testPaths[0], uri.getFilesystemPath());

  ASSERT_TRUE(uri.fromPath(testPaths[1]));
  ASSERT_TRUE(uri.mScheme);
  ASSERT_TRUE(uri.mAuthority);
  ASSERT_TRUE(uri.mPath);
  ASSERT_FALSE(uri.mQuery);
  EXPECT_FALSE(uri.mFragment);
  EXPECT_EQ("file", *uri.mScheme);
  EXPECT_EQ("", *uri.mAuthority);
  EXPECT_EQ(testPaths[1], uri.getFilesystemPath());

  ASSERT_TRUE(uri.fromPath(testPaths[2]));
  ASSERT_TRUE(uri.mScheme);
  ASSERT_TRUE(uri.mAuthority);
  ASSERT_TRUE(uri.mPath);
  ASSERT_FALSE(uri.mQuery);
  EXPECT_FALSE(uri.mFragment);
  EXPECT_EQ("file", *uri.mScheme);
  EXPECT_EQ("", *uri.mAuthority);
  EXPECT_EQ(testPaths[2], uri.getFilesystemPath());
}

TEST(UriHelpers, fromStringOrPath_UriNotPathNorFileUri_ReturnsUriNotFileUri)
{
  std::vector<std::string> testUris
      = {"ftp://ftp.is.co.za/rfc/rfc1808.txt",
         "http://www.ietf.org/rfc/rfc2396.txt",
         "ldap://[2001:db8::7]/c=GB?objectClass?one",
         "mailto:John.Doe@example.com",
         "news:comp.infosystems.www.servers.unix",
         "tel:+1-816-555-1212",
         "telnet://192.0.2.16:80/",
         "urn:oasis:names:specification:docbook:dtd:xml:4.1.2"};

  Uri uri;

  for (const std::string& testUri : testUris)
  {
    uri.fromStringOrPath(testUri);

    EXPECT_NE("file", *uri.mScheme);
    EXPECT_EQ(testUri, uri.toString());
  }
}

TEST(UriHelpers, fromString_InputIsUri_DoesNotChange)
{
  Uri uri;

  ASSERT_TRUE(uri.fromString("ftp://ftp.is.co.za/rfc/rfc1808.txt"));
  ASSERT_TRUE(uri.mScheme);
  ASSERT_TRUE(uri.mAuthority);
  ASSERT_TRUE(uri.mPath);
  EXPECT_FALSE(uri.mQuery);
  EXPECT_FALSE(uri.mFragment);
  EXPECT_EQ("ftp", *uri.mScheme);
  EXPECT_EQ("ftp.is.co.za", *uri.mAuthority);
  EXPECT_EQ("/rfc/rfc1808.txt", *uri.mPath);
}

TEST(UriHelpers, getUri_InputIsUri_DoesNotChange)
{
  std::vector<std::string> testUris
      = {"ftp://ftp.is.co.za/rfc/rfc1808.txt",
         "http://www.ietf.org/rfc/rfc2396.txt",
         "ldap://[2001:db8::7]/c=GB?objectClass?one",
         "mailto:John.Doe@example.com",
         "news:comp.infosystems.www.servers.unix",
         "tel:+1-816-555-1212",
         "telnet://192.0.2.16:80/",
         "urn:oasis:names:specification:docbook:dtd:xml:4.1.2"};

  for (const std::string& testUri : testUris)
    EXPECT_EQ(testUri, Uri::createFromString(testUri).toString());
}

TEST(UriHelpers, getUri_InputIsPath_AppendsFileSchema)
{
#ifdef _WIN32
  std::vector<std::string> testPaths = {
      "C:\\foo",
      "C:\\foo\\",
      "C:\\foo\\bar",
  };
#else
  std::vector<std::string> testPaths = {"/foo", "/foo/", "/foo/bar"};
#endif

  for (const std::string& testPath : testPaths)
  {
#ifdef _WIN32
    // On Windows, an absolute path does not begin with forward slash but a
    // file URI needs it to represent an empty authority,
    const std::string testUri = "file:///" + testPath;
#else
    // wherease on Unix systems the additional forward slash is not required
    // since an absolute path already has it.
    const std::string testUri = "file://" + testPath;
#endif
    EXPECT_EQ(testUri, Uri::getUri(testPath));
  }
}

TEST(UriHelpers, getRelativeUri)
{
  std::vector<std::pair<std::string, std::string> > testPairs = {
      // RFC 3986, Section 5.4.1.: Normal Examples
      {"g:h", "g:h"},
      {"g", "http://a/b/c/g"},
      {"./g", "http://a/b/c/g"},
      {"g/", "http://a/b/c/g/"},
      {"/g", "http://a/g"},
      {"//g", "http://g"},
      {"?y", "http://a/b/c/d;p?y"},
      {"g?y", "http://a/b/c/g?y"},
      {"#s", "http://a/b/c/d;p?q#s"},
      {"g#s", "http://a/b/c/g#s"},
      {"g?y#s", "http://a/b/c/g?y#s"},
      {";x", "http://a/b/c/;x"},
      {"g;x", "http://a/b/c/g;x"},
      {"g;x?y#s", "http://a/b/c/g;x?y#s"},
      {"", "http://a/b/c/d;p?q"},
      {".", "http://a/b/c/"},
      {"./", "http://a/b/c/"},
      {"..", "http://a/b/"},
      {"../", "http://a/b/"},
      {"../g", "http://a/b/g"},
      {"../..", "http://a/"},
      {"../../", "http://a/"},
      {"../../g", "http://a/g"},
      // RFC 3986, Section 5.4.2.: Abnormal Examples
      {"../../../g", "http://a/g"},
      {"../../../../g", "http://a/g"},
      {"/./g", "http://a/g"},
      {"/../g", "http://a/g"},
      {"g.", "http://a/b/c/g."},
      {".g", "http://a/b/c/.g"},
      {"g..", "http://a/b/c/g.."},
      {"..g", "http://a/b/c/..g"},
      {"./../g", "http://a/b/g"},
      {"./g/.", "http://a/b/c/g/"},
      {"g/./h", "http://a/b/c/g/h"},
      {"g/../h", "http://a/b/c/h"},
      {"g;x=1/./y", "http://a/b/c/g;x=1/y"},
      {"g;x=1/../y", "http://a/b/c/y"},
      {"g?y/./x", "http://a/b/c/g?y/./x"},
      {"g?y/../x", "http://a/b/c/g?y/../x"},
      {"g#s/./x", "http://a/b/c/g#s/./x"},
      {"g#s/../x", "http://a/b/c/g#s/../x"},
  };

  Uri baseUri, relativeUri, mergedUri;
  ASSERT_TRUE(baseUri.fromString("http://a/b/c/d;p?q"));

  for (const auto& it : testPairs)
  {
    const std::string& expectedUri = it.second;

    ASSERT_TRUE(relativeUri.fromString(it.first));

    // Strict mode
    ASSERT_TRUE(mergedUri.fromRelativeUri(baseUri, relativeUri, true));
    EXPECT_EQ(expectedUri, mergedUri.toString());

    // Backwards compatability mode
    ASSERT_TRUE(mergedUri.fromRelativeUri(baseUri, relativeUri, false));
    EXPECT_EQ(expectedUri, mergedUri.toString());
  }

  // Strict mode behavior.
  ASSERT_TRUE(relativeUri.fromString("http:g"));
  ASSERT_TRUE(mergedUri.fromRelativeUri(baseUri, "http:g", true));
  EXPECT_EQ("http:g", mergedUri.toString());

  // TODO: I'm not sure what we have to do to implement this. The approach
  // described in the RFC doesn't seem to produce the expected result.
#if 0
  // Backwards compatability mode behavior.
  ASSERT_TRUE(relativeUri.fromString("http:g"));
  ASSERT_TRUE(mergedUri.fromRelativeUri(baseUri, "http:g", false));
  EXPECT_EQ("http://a/b/c/g", mergedUri.toString());
#endif
}
