#include <Adafruit_GFX.h>      // include Adafruit graphics library
#include <Adafruit_ILI9341.h>   // include Adafruit ILI9341 TFT library
// ILI9341 TFT module connections
#define TFT_RST 4
#define TFT_CS  5
#define TFT_DC  2
Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC, TFT_RST);
#include <WiFi.h>
#include <HTTPClient.h>
#include <ArduinoJson.h>

const char* ssid = "Wokwi-GUEST";
const char* password = "";

const char* host = "api.openweathermap.org";

String cityName = "Caino";
String appKey = "";
int flagScreen = 0;
int flagFirstData = 1;
int state = 0;
unsigned long measureDelayInternalCycle = 10000; // 10s
unsigned long lastTimeRanInternalCycle;
unsigned long measureDelayExternalCycle = 60000; // 60s
unsigned long measureDelayExternalCycleVariable;
unsigned long lastTimeRanExternalCycle;
String line = "";
String tempNow0 = "";
String pressure0 = "";
String humNow0 = "";
String weatherNow0 = "";
String dateNow0 = "";
String tempNow1 = "";
String pressure1 = "";
String humNow1 = "";
String weatherNow1 = "";
String dateNow1 = "";
String tempNow2 = "";
String pressure2 = "";
String humNow2 = "";
String weatherNow2 = "";
String dateNow2 = "";
String tempNow3 = "";
String pressure3 = "";
String humNow3 = "";
String weatherNow3 = "";
String dateNow3 = "";
String tempNow4 = "";
String pressure4 = "";
String humNow4 = "";
String weatherNow4 = "";
String dateNow4 = "";

void testfillrects(uint16_t color1, uint16_t color2) {
  tft.fillScreen(ILI9341_BLACK);
  for (int16_t x = tft.width() - 1; x > 6; x -= 6) {
    tft.fillRect(tft.width() / 2 - x / 2, tft.height() / 2 - x / 2, x, x, color1);
    tft.drawRect(tft.width() / 2 - x / 2, tft.height() / 2 - x / 2, x, x, color2);
  }
}

void tftConnecting() {
  tft.setCursor(0, 0);
  tft.setRotation(0);
  tft.setTextColor(ILI9341_RED);
  tft.setTextSize(2);
  tft.println("Connecting...");
  delay(1500);
}

void tftConnected() {
  tft.setCursor(0, 0);
  tft.setRotation(0);
  tft.setTextColor(ILI9341_GREEN);
  tft.setTextSize(2);
  tft.println("Connected!");
  delay(2000);
  tft.fillScreen(ILI9341_BLACK);
}

void setup(void) {
  Serial.begin(115200);
  delay(2000);
  tft.begin();
  tft.fillScreen(ILI9341_BLACK);
  testfillrects(ILI9341_YELLOW, ILI9341_MAGENTA);
  WiFi.begin(ssid, password);
  tft.fillScreen(ILI9341_BLACK);
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting...");
    tftConnecting();
  }
  if (WiFi.status() == WL_CONNECTED) {
    Serial.println("CONNECTED");
    tft.fillScreen(ILI9341_BLACK);
    tftConnected();
  }
}

void loop() {
  WiFiClient client;
  if (flagFirstData == 1) {
    measureDelayExternalCycleVariable = 2000;
    tft.setCursor(0, 0);
    tft.setRotation(0);
    tft.setTextWrap(true);
    tft.setTextColor(ILI9341_RED);
    tft.setTextSize(2);
    tft.println("Wait a few seconds.");
    tft.println();
    tft.println("I'm receiving the first data.");
  } else {
    measureDelayExternalCycleVariable = measureDelayExternalCycle;
  }
  if (millis() > lastTimeRanExternalCycle + measureDelayExternalCycleVariable) {
    Serial.printf("\n[Connecting to %s ... ", host);
    if (client.connect(host, 80)) {
      client.println("GET /data/2.5/forecast?q=" + cityName + "&APPID=" + appKey + "&mode=json&units=metric&cnt=7 HTTP/1.1");
      client.println("Host: api.openweathermap.org");
      client.println("User-Agent: ArduinoWiFi/1.1");
      client.println("Connection: close");
      client.println();
      while (client.connected() || client.available()) {
        if (client.available()) {
          line = client.readStringUntil('\n');
        }
      }
      client.stop();
    } else {
      Serial.println("connection failed!]");
      client.stop();
    }
    Serial.println("\n");
    Serial.println("-----------------------------------");
    Serial.println(line);
    Serial.println("-----------------------------------");
    int sizeResponse = line.length();
    DynamicJsonDocument doc(sizeResponse);
    deserializeJson(doc, line);
    JsonObject obj = doc.as<JsonObject>();
    String responseCode = obj["cod"];
    if (responseCode == "200") {
      tempNow0 = String(obj["list"][0]["main"]["temp"]);
      humNow0 = String(obj["list"][0]["main"]["humidity"]);
      pressure0 = String(obj["list"][0]["main"]["pressure"]);
      weatherNow0 = String(obj["list"][0]["weather"][0]["description"]);
      dateNow0 = String(obj["list"][0]["dt_txt"]);
      tempNow1 = String(obj["list"][1]["main"]["temp"]);
      humNow1 = String(obj["list"][1]["main"]["humidity"]);
      pressure1 = String(obj["list"][1]["main"]["pressure"]);
      weatherNow1 = String(obj["list"][1]["weather"][0]["description"]);
      dateNow1 = String(obj["list"][1]["dt_txt"]);
      tempNow2 = String(obj["list"][2]["main"]["temp"]);
      humNow2 = String(obj["list"][2]["main"]["humidity"]);
      pressure2 = String(obj["list"][2]["main"]["pressure"]);
      weatherNow2 = String(obj["list"][2]["weather"][0]["description"]);
      dateNow2 = String(obj["list"][2]["dt_txt"]);
      tempNow3 = String(obj["list"][3]["main"]["temp"]);
      humNow3 = String(obj["list"][3]["main"]["humidity"]);
      pressure3 = String(obj["list"][3]["main"]["pressure"]);
      weatherNow3 = String(obj["list"][3]["weather"][0]["description"]);
      dateNow3 = String(obj["list"][3]["dt_txt"]);
      tempNow4 = String(obj["list"][4]["main"]["temp"]);
      humNow4 = String(obj["list"][4]["main"]["humidity"]);
      pressure4 = String(obj["list"][4]["main"]["pressure"]);
      weatherNow4 = String(obj["list"][4]["weather"][0]["description"]);
      dateNow4 = String(obj["list"][4]["dt_txt"]);
    } else {
      tft.fillScreen(ILI9341_BLACK);
      tft.setCursor(0, 0);
      tft.setRotation(0);
      tft.setTextWrap(true);
      tft.setTextColor(ILI9341_RED);
      tft.setTextSize(2);
      tft.println("Something went wrong!");
      return;
    }
    flagFirstData = 0;
    lastTimeRanExternalCycle = millis();
  }
  String dateMod = "";
  if (millis() > lastTimeRanInternalCycle + measureDelayInternalCycle)  {
    switch (state) {
      case 0:
        tft.fillScreen(ILI9341_BLACK);
        tft.setCursor(0, 0);
        tft.setRotation(0);
        tft.setTextColor(ILI9341_GREEN);
        tft.setTextSize(2);
        tft.println(cityName);
        tft.print("T: " + tempNow0);
        tft.println(" C");
        tft.print("H: " + humNow0);
        tft.print(" %");
        tft.println();
        tft.print("P: " + pressure0);
        tft.print(" hP");
        tft.println("\nWeather: ");
        tft.print(weatherNow0);
        tft.println();
        tft.println();
        for (int i = 5; i < dateNow0.length() - 3; i++) {
          dateMod += dateNow0[i];
        }
        dateMod.replace("-", "/");
        tft.println(dateMod);
        state = 1;
        break;
      case 1:
        tft.fillScreen(ILI9341_BLACK);
        tft.setCursor(0, 0);
        tft.setRotation(0);
        tft.setTextColor(ILI9341_GREEN);
        tft.setTextSize(2);
        tft.println(cityName);
        tft.print("T: " + tempNow1);
        tft.println(" C");
        tft.print("H: " + humNow1);
        tft.print(" %");
        tft.println();
        tft.print("P: " + pressure1);
        tft.print(" hP");
        tft.println("\nWeather: ");
        tft.print(weatherNow1);
        tft.println();
        tft.println();
        for (int i = 5; i < dateNow1.length() - 3; i++) {
          dateMod += dateNow1[i];
        }
        dateMod.replace("-", "/");
        tft.println(dateMod);
        state = 2;
        break;
      case 2:
        tft.fillScreen(ILI9341_BLACK);
        tft.setCursor(0, 0);
        tft.setRotation(0);
        tft.setTextColor(ILI9341_GREEN);
        tft.setTextSize(2);
        tft.println(cityName);
        tft.print("T: " + tempNow2);
        tft.println(" C");
        tft.print("H: " + humNow2);
        tft.print(" %");
        tft.println();
        tft.print("P: " + pressure2);
        tft.print(" hP");
        tft.println("\nWeather: ");
        tft.print(weatherNow2);
        tft.println();
        tft.println();
        for (int i = 5; i < dateNow2.length() - 3; i++) {
          dateMod += dateNow2[i];
        }
        dateMod.replace("-", "/");
        tft.println(dateMod);
        state = 3;
        break;
      case 3:
        tft.fillScreen(ILI9341_BLACK);
        tft.setCursor(0, 0);
        tft.setRotation(0);
        tft.setTextColor(ILI9341_GREEN);
        tft.setTextSize(2);
        tft.println(cityName);
        tft.print("T: " + tempNow3);
        tft.println(" C");
        tft.print("H: " + humNow3);
        tft.print(" %");
        tft.println();
        tft.print("P: " + pressure3);
        tft.print(" hP");
        tft.println("\nWeather: ");
        tft.print(weatherNow3);
        tft.println();
        tft.println();
        for (int i = 5; i < dateNow3.length() - 3; i++) {
          dateMod += dateNow3[i];
        }
        dateMod.replace("-", "/");
        tft.println(dateMod);
        state = 4;
        break;
      case 4:
        tft.fillScreen(ILI9341_BLACK);
        tft.setCursor(0, 0);
        tft.setRotation(0);
        tft.setTextColor(ILI9341_GREEN);
        tft.setTextSize(2);
        tft.println(cityName);
        tft.print("T: " + tempNow4);
        tft.println(" C");
        tft.print("H: " + humNow4);
        tft.print(" %");
        tft.println();
        tft.print("P: " + pressure4);
        tft.print(" hP");
        tft.println("\nWeather: ");
        tft.print(weatherNow4);
        tft.println();
        tft.println();
        for (int i = 5; i < dateNow4.length() - 3; i++) {
          dateMod += dateNow4[i];
        }
        dateMod.replace("-", "/");
        tft.println(dateMod);
        state = 0;
        break;
      default:
        tft.setCursor(0, 0);
        tft.setRotation(0);
        tft.setTextWrap(true);
        tft.setTextColor(ILI9341_RED);
        tft.setTextSize(2);
        tft.println("Undefined option");
        break;
    }

    lastTimeRanInternalCycle = millis();
  }
}
// https://www.techrm.com/weather-station-project-with-esp8266-and-tft-display-real-time-monitoring-of-weather-forecasts/