#include <WiFi.h>
#include <HTTPClient.h>
#include "SPI.h"
#include "Adafruit_GFX.h"
#include "Adafruit_ILI9341.h"
#include "time.h"

#define TFT_CS    10
#define TFT_DC    12
#define TFT_RST   11
#define TFT_MOSI  13
#define TFT_CLK   14

Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC, TFT_MOSI, TFT_CLK, TFT_RST);

struct Sinav { char ad[15]; int g; int a; };
Sinav sinavlar[] = {
  {"Turkce", 30, 3}, {"Fen Bil.", 31, 3}, {"Ingilizce", 1, 4},
  {"Sosyal Bil.", 2, 4}, {"Matematik", 3, 4}, {"Din Kult.", 6, 4}
};

const char* program[5][7] = {
  {"Turkce", "Turkce", "Mat", "Mat", "Fen", "Sosyal", "Ing"},
  {"Fen", "Fen", "Turkce", "Sosyal", "Sosyal", "Din", "Din"},
  {"Mat", "Mat", "Ing", "Ing", "Turkce", "Gorsel", "Muzik"},
  {"Beden", "Beden", "Fen", "Fen", "Mat", "Turkce", "Turkce"},
  {"Rehber", "Sosyal", "Ing", "Ing", "TekTas", "TekTas", "Bilisim"}
};

String safDerece = "--";
unsigned long sonHavaGuncelleme = 0;
int sonSaniye = -1;

void havaDurumuAl() {
  if(WiFi.status() == WL_CONNECTED) {
    HTTPClient http;
    http.begin("http://wttr.in/Safranbolu?format=%t"); 
    int httpCode = http.GET();
    if(httpCode > 0) {
      String hamVeri = http.getString();
      safDerece = ""; 
      for(int j=0; j<hamVeri.length(); j++){
        if(isdigit(hamVeri[j])) safDerece += hamVeri[j];
      }
    }
    http.end();
  }
}

void setup() {
  tft.begin();
  tft.setRotation(0); 
  tft.fillScreen(ILI9341_BLACK);
  
  WiFi.begin("Wokwi-GUEST", "");
  while (WiFi.status() != WL_CONNECTED) delay(100);
  
  configTime(10800, 0, "pool.ntp.org"); 
  havaDurumuAl();
  
  tft.fillScreen(ILI9341_BLACK);
  
  // EKRANI İLK AÇILIŞTA TAM DOLDUR
  struct tm ti;
  while(!getLocalTime(&ti)) delay(10);
  
  sabitleriCiz(); 
  dinamikIcerikCiz(&ti); 
}

void loop() {
  struct tm ti;
  if(!getLocalTime(&ti)) return;

  if (ti.tm_sec != sonSaniye) {
    sonSaniye = ti.tm_sec;
    saatGuncelle(&ti);
    // Saat gece yarısı olduğunda veya her saat başı listeleri tazele
    if (ti.tm_min == 0 && ti.tm_sec == 0) dinamikIcerikCiz(&ti);
  }

  if (millis() - sonHavaGuncelleme > 1800000) {
    havaDurumuAl();
    sonHavaGuncelleme = millis();
    sabitleriCiz(); 
  }
}

void saatGuncelle(struct tm *ti) {
  tft.fillRect(5, 5, 120, 25, 0x000F); 
  tft.setTextColor(ILI9341_WHITE);
  tft.setTextSize(2);
  tft.setCursor(10, 10);
  tft.printf("%02d:%02d:%02d", ti->tm_hour, ti->tm_min, ti->tm_sec);
}

void sabitleriCiz() {
  tft.fillRect(0, 0, 240, 35, 0x000F);
  tft.setCursor(170, 10);
  tft.setTextColor(ILI9341_WHITE);
  tft.setTextSize(2);
  tft.print(safDerece); tft.print(" C");

  // Necmettin - Gözlük çizgisi olmadan
  int nx = 195, ny = 280;
  tft.fillCircle(nx, ny, 25, ILI9341_YELLOW); 
  tft.fillCircle(nx-9, ny-6, 4, ILI9341_BLACK); 
  tft.fillCircle(nx+9, ny-6, 4, ILI9341_BLACK); 
  tft.drawCircle(nx, ny+5, 10, ILI9341_BLACK); 
  tft.fillRect(nx-12, ny-2, 24, 10, ILI9341_YELLOW);
}

void dinamikIcerikCiz(struct tm *ti) {
  // YAZILI PROGRAMI (30 Mart Türkçe, 31 Mart Fen)
  tft.setCursor(5, 45);
  tft.setTextColor(ILI9341_CYAN);
  tft.setTextSize(2);
  tft.println("YAZILI PROGRAMI");
  tft.setTextSize(1);
  for(int i=0; i<6; i++) {
    int sGun = (sinavlar[i].a == 3) ? sinavlar[i].g : (31 + sinavlar[i].g);
    int bGun = ((ti->tm_mon + 1) == 3) ? ti->tm_mday : (31 + ti->tm_mday);
    int kalan = sGun - bGun;
    tft.setCursor(5, 65 + (i*13));
    if(kalan == 0) tft.setTextColor(ILI9341_YELLOW);
    else if(kalan < 0) tft.setTextColor(0x7BEF);
    else tft.setTextColor(ILI9341_WHITE);
    tft.printf("%s: %d Gun Kaldi", sinavlar[i].ad, (kalan < 0 ? 0 : kalan));
  }

  // DERS PROGRAMI (7-C Programı)
  tft.drawFastHLine(5, 150, 230, ILI9341_WHITE);
  tft.setCursor(5, 158);
  tft.setTextColor(ILI9341_GREEN);
  tft.setTextSize(2);
  tft.println("DERS PROGRAMI");
  tft.setTextSize(1);
  tft.setTextColor(ILI9341_WHITE);
  int gun = ti->tm_wday - 1; 
  if(gun >= 0 && gun <= 4) {
    for(int d=0; d<7; d++) {
      tft.setCursor(10, 178 + (d*12));
      tft.printf("%d. %s", d+1, program[gun][d]);
    }
  } else {
    tft.setCursor(10, 185);
    tft.println("Haftasonu! Dinlen :)");
  }
}