#include <WiFi.h>
#include <Ticker.h>
#include <GxEPD2_BW.h>
#include <Fonts/FreeMonoBold18pt7b.h>
#include <Fonts/FreeMonoBold9pt7b.h>
#include <dht.h>

#define WIFI_SSID "Wokwi-GUEST"
#define WIFI_PASS ""
#define TZ_INFO "HST10"
#define NTP_SRV "pool.ntp.org"

#define GxEPD2_DRIVER_CLASS GxEPD2_290
#define GxEPD2_DISPLAY_CLASS GxEPD2_BW
#define GxEPD2_BW_IS_GxEPD2_BW true
#define MAX_DISPLAY_BUFFER_SIZE 65536ul
#define MAX_HEIGHT(EPD) (EPD::HEIGHT <= MAX_DISPLAY_BUFFER_SIZE / (EPD::WIDTH / 8) ? EPD::HEIGHT : MAX_DISPLAY_BUFFER_SIZE / (EPD::WIDTH / 8))
#define EPD_CS SS

#define DHT_TYPE DHT_TYPE_AM2301
#define DHT_GPIO (gpio_num_t)19

GxEPD2_BW<GxEPD2_290, GxEPD2_290::HEIGHT> display(GxEPD2_290(/*CS=*/ 5, /*DC=*/ 17, /*RST=*/ 16, /*BUSY=*/ 4));
Ticker tkSecond;
Ticker tkMinute;

int16_t temperature = 0;
int16_t humidity = 0;

void every_second() {
  Serial.println("every second");
  display.setFont(&FreeMonoBold18pt7b);
  display.setTextColor(GxEPD_BLACK);
  display.fillRect(0, 0, 180, 50, GxEPD_WHITE);
  display.setCursor(10,40);

  time_t now;
  struct tm* timeinfo;
  char timestr[9];
  time(&now);
  timeinfo = localtime(&now);
  strftime(timestr, 9, "%T", timeinfo);

//  display.setFullWindow();
  display.fillRect(0, 0, 180, 60, GxEPD_WHITE);
  display.setFont(&FreeMonoBold18pt7b);
  display.setCursor(10,40);
  display.print(timestr);
  display.displayWindow(0,0,180,50);
}

void every_minute() {
  Serial.println("every minute");
  dht_read_data(DHT_TYPE, DHT_GPIO, &humidity, &temperature);
  display.setFont(&FreeMonoBold9pt7b);
  display.fillRect(0, 51, 180, 105, GxEPD_WHITE);
  display.setCursor(0,70);
  Serial.printf("Temp: %dC\n Humidity: %d%%", temperature / 10, humidity / 10);
  display.printf("Temp: %dC\n Humidity: %d%%", temperature / 10, humidity / 10);
  display.displayWindow(0,51,180,105);
}

void setup() {
  Serial.begin(115200);
  display.init(0, false, 2, false);
  display.setRotation(3);
  display.setTextColor(GxEPD_BLACK);
  Serial.println("display init");
  WiFi.begin(WIFI_SSID, WIFI_PASS);
  Serial.println("Wifi");
  display.clearScreen();
  Serial.println("clear screen");
  WiFi.waitForConnectResult();

  configTzTime(TZ_INFO, NTP_SRV);
  every_minute();
  tkMinute.attach(3600, every_minute);

  struct tm now;
  getLocalTime(&now, 10000);
  //display.init(0, false, 2, false);
  tkSecond.attach(1, every_second);
}

void loop() {
  delay(-1);
}