//     __ _____ _____ _____
//  __|  |   __|     |   | |  JSON for Modern C++ (supporting code)
// |  |  |__   |  |  | | | |  version 3.11.3
// |_____|_____|_____|_|___|  https://github.com/nlohmann/json
//
// SPDX-FileCopyrightText: 2013-2023 Niels Lohmann <https://nlohmann.me>
// SPDX-License-Identifier: MIT

#include "doctest_compatibility.h"

#include <azure/core/internal/json/json.hpp>
using Azure::Core::Json::_internal::json;
#ifdef _azure_JSON_TEST_NO_GLOBAL_UDLS
using namespace Azure::Core::Json::_internal::literals; // NOLINT(google-build-using-namespace)
#endif

#include <deque>
#include <forward_list>
#include <iomanip>
#include <iostream>
#include <list>
#include <set>
#include <sstream>
#include <unordered_map>
#include <unordered_set>

// local variable is initialized but not referenced
DOCTEST_MSVC_SUPPRESS_WARNING_PUSH
DOCTEST_MSVC_SUPPRESS_WARNING(4189)

TEST_CASE("README" * doctest::skip())
{
  {
    // redirect std::cout for the README file
    auto* old_cout_buffer = std::cout.rdbuf();
    std::ostringstream const new_stream;
    std::cout.rdbuf(new_stream.rdbuf());
    {
      // create an empty structure (null)
      json j;

      // add a number that is stored as double (note the implicit conversion of j to an object)
      j["pi"] = 3.141;

      // add a Boolean that is stored as bool
      j["happy"] = true;

      // add a string that is stored as std::string
      j["name"] = "Niels";

      // add another null object by passing nullptr
      j["nothing"] = nullptr;

      // add an object inside the object
      j["answer"]["everything"] = 42;

      // add an array that is stored as std::vector (using an initializer list)
      j["list"] = {1, 0, 2};

      // add another object (using an initializer list of pairs)
      j["object"] = {{"currency", "USD"}, {"value", 42.99}};

      // instead, you could also write (which looks very similar to the JSON above)
      json const j2
          = {{"pi", 3.141},
             {"happy", true},
             {"name", "Niels"},
             {"nothing", nullptr},
             {"answer", {{"everything", 42}}},
             {"list", {1, 0, 2}},
             {"object", {{"currency", "USD"}, {"value", 42.99}}}};
    }

    {
      // ways to express the empty array []
      json const empty_array_implicit = {{}};
      CHECK(empty_array_implicit.is_array());
      json const empty_array_explicit = json::array();
      CHECK(empty_array_explicit.is_array());

      // a way to express the empty object {}
      json const empty_object_explicit = json::object();
      CHECK(empty_object_explicit.is_object());

      // a way to express an _array_ of key/value pairs [["currency", "USD"], ["value", 42.99]]
      json array_not_object = json::array({{"currency", "USD"}, {"value", 42.99}});
      CHECK(array_not_object.is_array());
      CHECK(array_not_object.size() == 2);
      CHECK(array_not_object[0].is_array());
      CHECK(array_not_object[1].is_array());
    }

    {
      // create object from string literal
      json const j
          = "{ \"happy\": true, \"pi\": 3.141 }"_json; // NOLINT(modernize-raw-string-literal)

      // or even nicer with a raw string literal
      auto j2 = R"({
                "happy": true,
                "pi": 3.141
            })"_json;

      // or explicitly
      auto j3 = json::parse(R"({"happy": true, "pi": 3.141})");

      // explicit conversion to string
      std::string const s = j.dump(); // NOLINT(bugprone-unused-local-non-trivial-variable) //
                                      // {\"happy\":true,\"pi\":3.141}

      // serialization with pretty printing
      // pass in the amount of spaces to indent
      std::cout << j.dump(4) << std::endl; // NOLINT(performance-avoid-endl)
      // {
      //     "happy": true,
      //     "pi": 3.141
      // }

      std::cout << std::setw(2) << j << std::endl; // NOLINT(performance-avoid-endl)
    }

    {
      // create an array using push_back
      json j;
      j.push_back("foo");
      j.push_back(1);
      j.push_back(true);

      // comparison
      bool x = (j == R"(["foo", 1, true])"_json); // true
      CHECK(x == true);

      // iterate the array
      for (json::iterator it = j.begin(); it != j.end(); ++it) // NOLINT(modernize-loop-convert)
      {
        std::cout << *it << '\n';
      }

      // range-based for
      for (auto& element : j)
      {
        std::cout << element << '\n';
      }

      // getter/setter
      const auto tmp
          = j[0].get<std::string>(); // NOLINT(bugprone-unused-local-non-trivial-variable)
      j[1] = 42;
      bool foo{j.at(2)};
      CHECK(foo == true);

      // other stuff
      CHECK(j.size() == 3); // 3 entries
      CHECK_FALSE(j.empty()); // false
      CHECK(j.type() == json::value_t::array); // json::value_t::array
      j.clear(); // the array is empty again

      // create an object
      json o;
      o["foo"] = 23;
      o["bar"] = false;
      o["baz"] = 3.141;

      // find an entry
      CHECK(o.find("foo") != o.end());
      if (o.find("foo") != o.end())
      {
        // there is an entry with key "foo"
      }
    }

    {
      std::vector<int> const c_vector{1, 2, 3, 4};
      json const j_vec(c_vector);
      // [1, 2, 3, 4]

      std::deque<float> const c_deque{1.2f, 2.3f, 3.4f, 5.6f};
      json const j_deque(c_deque);
      // [1.2, 2.3, 3.4, 5.6]

      std::list<bool> const c_list{true, true, false, true};
      json const j_list(c_list);
      // [true, true, false, true]

      std::forward_list<int64_t> const c_flist{
          12345678909876, 23456789098765, 34567890987654, 45678909876543};
      json const j_flist(c_flist);
      // [12345678909876, 23456789098765, 34567890987654, 45678909876543]

      std::array<unsigned long, 4> const c_array{{1, 2, 3, 4}};
      json const j_array(c_array);
      // [1, 2, 3, 4]

      std::set<std::string> const c_set{"one", "two", "three", "four", "one"};
      json const j_set(c_set); // only one entry for "one" is used
      // ["four", "one", "three", "two"]

      std::unordered_set<std::string> const c_uset{"one", "two", "three", "four", "one"};
      json const j_uset(c_uset); // only one entry for "one" is used
      // maybe ["two", "three", "four", "one"]

      std::multiset<std::string> const c_mset{"one", "two", "one", "four"};
      json const j_mset(c_mset); // both entries for "one" are used
      // maybe ["one", "two", "one", "four"]

      std::unordered_multiset<std::string> const c_umset{"one", "two", "one", "four"};
      json const j_umset(c_umset); // both entries for "one" are used
      // maybe ["one", "two", "one", "four"]
    }

    {
      std::map<std::string, int> const c_map{{"one", 1}, {"two", 2}, {"three", 3}};
      json const j_map(c_map);
      // {"one": 1, "two": 2, "three": 3}

      std::unordered_map<const char*, float> const c_umap{
          {"one", 1.2f}, {"two", 2.3f}, {"three", 3.4f}};
      json const j_umap(c_umap);
      // {"one": 1.2, "two": 2.3, "three": 3.4}

      std::multimap<std::string, bool> const c_mmap{
          {"one", true}, {"two", true}, {"three", false}, {"three", true}};
      json const j_mmap(c_mmap); // only one entry for key "three" is used
      // maybe {"one": true, "two": true, "three": true}

      std::unordered_multimap<std::string, bool> const c_ummap{
          {"one", true}, {"two", true}, {"three", false}, {"three", true}};
      json const j_ummap(c_ummap); // only one entry for key "three" is used
      // maybe {"one": true, "two": true, "three": true}
    }

    {
      // strings
      std::string const s1 = "Hello, world!";
      json const js = s1;
      auto s2 = js.get<std::string>(); // NOLINT(bugprone-unused-local-non-trivial-variable)

      // Booleans
      bool const b1 = true;
      json const jb = b1;
      bool b2{jb};
      CHECK(b2 == true);

      // numbers
      int const i = 42;
      json const jn = i;
      double f{jn};
      CHECK(f == 42);

      // etc.

      std::string const vs
          = js.get<std::string>(); // NOLINT(bugprone-unused-local-non-trivial-variable)
      bool vb = jb.get<bool>();
      CHECK(vb == true);
      int vi = jn.get<int>();
      CHECK(vi == 42);

      // etc.
    }

    {
      // a JSON value
      json j_original = R"({
                "baz": ["one", "two", "three"],
                "foo": "bar"
            })"_json;

      // access members with a JSON pointer (RFC 6901)
      j_original["/baz/1"_json_pointer];
      // "two"

      // a JSON patch (RFC 6902)
      json const j_patch = R"([
                { "op": "replace", "path": "/baz", "value": "boo" },
                { "op": "add", "path": "/hello", "value": ["world"] },
                { "op": "remove", "path": "/foo"}
            ])"_json;

      // apply the patch
      json const j_result = j_original.patch(j_patch);
      // {
      //    "baz": "boo",
      //    "hello": ["world"]
      // }

      // calculate a JSON patch from two JSON values
      auto res = json::diff(j_result, j_original);
      // [
      //   { "op":" replace", "path": "/baz", "value": ["one", "two", "three"] },
      //   { "op":"remove","path":"/hello" },
      //   { "op":"add","path":"/foo","value":"bar" }
      // ]
    }

    // restore old std::cout
    std::cout.rdbuf(old_cout_buffer);
  }
}

DOCTEST_MSVC_SUPPRESS_WARNING_POP
