// Learn about the ESP32 WiFi simulation in
// https://docs.wokwi.com/guides/esp32-wifi

#include <WiFi.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <HTTPClient.h>
#include <ArduinoJson.h>

#define I2C_ADDR    0x27
#define LCD_COLUMNS 16
#define LCD_LINES   2

LiquidCrystal_I2C LCD = LiquidCrystal_I2C(I2C_ADDR, LCD_COLUMNS, LCD_LINES);

#define NTP_SERVER     "pool.ntp.org"
#define UTC_OFFSET     -7
#define UTC_OFFSET_DST -8

#define CMC_URL "https://pro-api.coinmarketcap.com/v1/cryptocurrency/quotes/latest?slug=dero&convert=USD&CMC_PRO_API_KEY=b52902d2-277c-4e9f-8442-18a02ec33ca4"

void spinner() {
  static int8_t counter = 0;
  const char* glyphs = "\xa1\xa5\xdb";
  LCD.setCursor(15, 1);
  LCD.print(glyphs[counter++]);
  if (counter == strlen(glyphs)) {
    counter = 0;
  }
}

void printPrice(char *lineOne, char *lineTwo) {
  struct tm timeinfo;
  if (!getLocalTime(&timeinfo)) {
    LCD.setCursor(0, 1);
    LCD.println("Connection Err");
    return;
  }
  Serial.println(lineOne);
  Serial.println(lineTwo);
  LCD.setCursor(8, 0);
  //LCD.println(&timeinfo, "%H:%M:%S");
  LCD.println(lineOne);

  LCD.setCursor(0, 1);
  LCD.println(lineTwo);
  
  //LCD.println(&timeinfo, "%m/%d/%Y   %Z");
}

void printLocalTime() {
  struct tm timeinfo;
  if (!getLocalTime(&timeinfo)) {
    LCD.setCursor(0, 1);
    LCD.println("Connection Err");
    return;
  }

  LCD.setCursor(8, 0);
  LCD.println(&timeinfo, "%H:%M:%S");

  LCD.setCursor(0, 1);
  LCD.println(&timeinfo, "%m/%d/%Y   %Z");
}

WiFiClientSecure client;  // or WiFiClientSecure for HTTPS
HTTPClient http;
char buffer[40];

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

  LCD.init();
  LCD.backlight();
  LCD.setCursor(0, 0);
  LCD.print("Connecting to ");
  LCD.setCursor(0, 1);
  LCD.print("WiFi ");

  WiFi.begin("Wokwi-GUEST", "", 6);
  while (WiFi.status() != WL_CONNECTED) {
    delay(250);
    spinner();
  }

  Serial.println("");
  Serial.println("WiFi connected");
  Serial.print("IP address: ");
  Serial.println(WiFi.localIP());

  LCD.clear();
  LCD.setCursor(0, 0);
  LCD.println("Online");
  LCD.setCursor(0, 1);
  LCD.println("Updating time...");

  client.setInsecure();

  configTime(UTC_OFFSET, UTC_OFFSET_DST, NTP_SERVER);
}

void loop() {
  //printLocalTime();

  LCD.setCursor(0, 1);
  LCD.println("Fetching...    ");
  /*
  // Send request
  http.useHTTP10(true);
  http.begin(client, CMC_URL);
  http.GET();

  // Parse response
  DynamicJsonDocument doc(2048);
  DeserializationError error = deserializeJson(doc, http.getStream());

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

  // Read values
  double price = doc["data"]["2665"]["quote"]["USD"]["price"].as<double>();
  double change = doc["data"]["2665"]["quote"]["USD"]["percent_change_24h"].as<double>();
  const char* updated = doc["data"]["2665"]["quote"]["USD"]["last_updated"].as<const char*>();
  
  */
  double price = 0.00;
  double change = -0.0;
  struct tm timeinfo = {0};
  char buf[100];
  // Convert to tm struct
  //strptime("2022-11-04T23:08:00.000Z", "%Y-%m-%dT%H:%M:%S.%fZ", &timeinfo);
  if (getLocalTime(&timeinfo)) {
    strftime(buf, sizeof(buf), "%H:%M:%S", &timeinfo);
    Serial.println(buf);
  }

  if(change > 0) {
    sprintf(buffer, "$%2.2f +%2.2f%%", price, change);
  } else if (change < 0) {
    sprintf(buffer, "$%2.2f %2.2f%%", price, change);
  } else {
    sprintf(buffer, "Unchanged");
  }
  printPrice(buf, buffer);

  delay(60000);

  // Disconnect
  http.end();
}