/* ArduinoJson - https://arduinojson.org

  This example shows how to deserialize a JSON document with ArduinoJson.
  Section 3.2 of ArduinoJSON book
  See VSCode C++ 3.2_deserializing.cpp for C++ version

  8/5/25 CM:
    Working!!!
  8/7/25 CM:
    Not working exactly as C++ verson.
    Tried on EPS8266 and received the same output as on Wokwi.



*/

#include <ArduinoJson.h>

void setup() {
  Serial.begin(9600);

  JsonDocument myDoc; // Allocate the JSON document

  // JSON input string.
  //const char* json =
  //    "{\"sensor\":\"gps\",\"time\":1351824120,\"data\":[48.756080,2.302038]}";
  
  // When you have a line break you must end a line with " and start the next line with "
  const char* input =
      "{\"name\":\"ArduinoJson\", \"stargazers\":{\"totalCount\":6287}, \"issues\":{\"totalCount\":22}, \"myNum\":1234}";
  /* // This works too!
  const char* input =
      "{\"name\":\"ArduinoJson\","
      "\"stargazers\":{\"totalCount\":6287},"
      "\"issues\":{\"totalCount\":22},"
      "\"myNum\":1234}";
  */


  // Deserialize the JSON document
  DeserializationError error = deserializeJson(myDoc, input);

  // Test if parsing succeeds
  if (error) {
    Serial.print(F("deserializeJson() failed: "));
    Serial.println(error.f_str()); // works with error.c_str() as well
  }
  else {
    Serial.print(F("deserializeJson() passed: "));
    Serial.println(error.f_str()); // works with error.c_str() as well
  }

  //Serial.print("myDoc: ");
  //Serial.println(myDoc); // Error message on this line, won't print 'myDoc'

  // Fetch the values
  // Most of the time, you can rely on the implicit casts.
  // In other case, you can do doc["time"].as<long>();
  const char* name = myDoc["name"];
  String name2 = myDoc["name"]; // alternative way to display a string

  int stars = myDoc["stargazers"]["totalCount"];
  uint16_t stars2 = myDoc["stargazers"]["totalCount"];

  uint8_t issues = myDoc["issues"]["totalCount"];
  unsigned char issues2 = myDoc["issues"]["totalCount"];
  short issues3 = myDoc["issues"]["totalCount"];

  // Using '|' OR if the value returns null or '0'
  uint16_t myNum = myDoc["myNum"] | 80;


  // Print the values
  Serial.println(name);
  Serial.println(name2);
  Serial.println(stars);
  Serial.println(stars2);
  Serial.println(issues);
  Serial.println(issues2);
  Serial.println(issues3);
  Serial.println(myNum);

  /*
    >>>>>>>>>> JsonObject <<<<<<<<<<
    Now that we have a JsonObject, we can look at all the keys and their associated values. In ArduinoJson, a key-value pair is represented by the JsonPair class.
    We can enumerate all pairs with a simple for loop:
  
    JsonObject is similar to a smart pointer. It wraps a pointer with a class that is easy to use.
    When you modify the JsonObject, you also alter the JsonDocument
  */
  JsonObject myObject = myDoc.as<JsonObject>();

  // Now that we have a JsonObject, we can look at all the keys and their associated values.
  // In ArduinoJson, a key-value pair is represented by the JsonPair class.
  // Loop through all the key-value pairs in myObject...
  for (JsonPair p : myObject) {
    p.key(); // is a JsonString
    p.value(); // is a JsonVariant
  
    // and determine... Is it a string?
    if (p.value().is <const char*> ()) { // Can use 'string' in place of 'const char*'
      const char* isString = p.value(); // We can get the value via implicit cast:
      Serial.print("Value is string: "); Serial.println(isString);
    }
    else if (p.value().is <JsonObject> ()) {
      JsonObject isObject = p.value();
      Serial.print("Value is JsonObject: "); Serial.println(isObject);
    }
    else if (p.value().is <int> ()) {
      int isInt = p.value();
      Serial.print("Value is Integer: "); Serial.println(isInt);
    }
    else {
      Serial.println("Not a string or integer");
    }
  }
}

void loop() {
  // not used in this example
}