#include <WiFi.h>
#include <WiFiMulti.h>
WiFiMulti wifiMulti;

#include <HTTPClient.h>

#include <ArduinoJson.h>
String jsonBuffer;

const int pinLED = 2;

#include "secrets.h"

//Buzy Wait Timers
// unsigned long t_lastRead = 0;
// unsigned long T_read = 10000;

void setup() {
  Serial.begin(115200);
  delay(10);

  Serial.println("CS452 Rapid API");

  WiFi.mode(WIFI_MODE_STA);

  for (int i = 0; i < sizeof(wifi_cred) / sizeof(wifi_cred_t); i++) {
    if (wifi_cred[i].password == NULL) {
      wifiMulti.addAP(wifi_cred[i].ssid);
    } else {
      wifiMulti.addAP(wifi_cred[i].ssid, wifi_cred[i].password);
    }
  }

  Serial.println("Connecting...");
  connectWiFi();
}

//**** NEED to use the %20 for the space character ' '
// String dish = "chicken%20soup";

void loop() {
  // unsigned long t_now = millis();

  // if (t_now >= t_lastRead + T_read) {
  //   t_lastRead = t_now;

  //read line from console
  //message buffer
  char message[256];
  int i_msg = Serial.readBytesUntil('\n', message, 255);
  message[i_msg] = '\0';

  char dish[768];
  urlencode(dish, message);

  if (i_msg > 0) {
    if (WiFi.status() == WL_CONNECTED) {
      //**** NEEDS SERVER PATH
      String serverPath =
        String("https://spoonacular-recipe-food-nutrition-v1.p.rapidapi.com?q=") +
        dish;

      Serial.println(serverPath);
      jsonBuffer = httpGETRequest(serverPath.c_str());
      Serial.println(jsonBuffer);

      // Allocate the JSON jsonDocument
      //
      // Inside the brackets, 200 is the capacity of the memory pool in bytes.
      // Don't forget to change this value to match your JSON jsonDocument.
      // Use arduinojson.org/v6/assistant to compute the capacity.
      StaticJsonDocument<2048> jsonDoc;

      // Deserialize the JSON jsonDocument
      DeserializationError error = deserializeJson(jsonDoc, jsonBuffer);

      // Test if parsing succeeds.
      if (error) {
        Serial.print(F("deserializeJson() failed: "));
        Serial.println(error.c_str());
        return;
      }

      // double temperature = jsonDoc["main"]["temp"]; //we directly convert it to double without checking
      // double pressure = jsonDoc["main"]["pressure"];
      // double humidity = jsonDoc["main"]["humidity"];
      // double windSpeed = jsonDoc["wind"]["speed"];
      // String windDir = jsonDoc["wind"]["deg"];      //we are using a String for this
      // String windForce = jsonDoc["wind"]["force"];  //this is not there

      // Serial.print("Temperature: ");
      // Serial.println(temperature);
      // Serial.print("Pressure: ");
      // Serial.println(pressure);
      // Serial.print("Humidity: ");
      // Serial.println(humidity);
      // Serial.print("Wind Speed: ");
      // Serial.println(windSpeed);
      // Serial.print("Wind Direction: ");
      // Serial.println(windDir);
      // Serial.print("Wind Force: ");
      // if (windForce != "null") //here we check for null
      //   Serial.println(windForce);
      // else
      //   Serial.print("joson field not found");

      String ing = jsonDoc["ingredients"];
      Serial.println("Ingredients are: ");
      Serial.println(ing);
    } else {
      Serial.println("WiFi Disconnected");
      connectWiFi();
    }
  }
}

String httpGETRequest(const char* serverName) {
  HTTPClient http;

  // Your IP address with path or Domain name with URL path
  http.begin(serverName);

  //**** NEEDS FOLLOWING HEADERS
  // http.addHeader("Accept", "application/json");
  http.addHeader("X-RapidAPI-Key", RapidApiKey);
  http.addHeader("X-RapidAPI-Host", "spoonacular-recipe-food-nutrition-v1.p.rapidapi.com");

  // Send HTTP POST request
  int httpResponseCode = http.GET();

  String payload = "{}";

  if (httpResponseCode > 0) {
    Serial.print("HTTP Response code: ");
    Serial.println(httpResponseCode);
    payload = http.getString();
  }
  else {
    Serial.print("Error code: ");
    Serial.println(httpResponseCode);
  }
  // Free resources
  http.end();

  return payload;
}

void connectWiFi() {
  Serial.print("MAC: ");
  Serial.println(WiFi.macAddress());

  while (wifiMulti.run() != WL_CONNECTED) {
    delay(250);
    Serial.print(".");
    digitalWrite(pinLED, !digitalRead(pinLED));
  }

  digitalWrite(pinLED, HIGH);

  Serial.println();
  Serial.println();
  Serial.print("Connected to ");
  Serial.println(WiFi.SSID());
  Serial.print("IP address: ");
  Serial.println(WiFi.localIP());
}

inline char hex_digit(char c) {  
  return "01234567890ABCDEF"[c & 0x0F];
}

char *urlencode(char *dst,char *src) {  
  const char specials[] = "$&+,/:;=?@ \"<>#%{}|\^~[]'"; /* String containing chars you want encoded */

  char c;
  char*d = dst;
  while (c = *src++) {  
    if (strchr(specials,c)) {
      *d++ = '%';
      *d++ = hex_digit(c >> 4);
      c = hex_digit(c);
    }
    *d++ = c;
  }
  *d = '\0';
  return dst;
}