#include "HD44780.h"
#include "dht.h"
#include <esp_err.h>
#include <esp_log.h>
#include <freertos/FreeRTOS.h>
#include <freertos/task.h>
#include <stdint.h>
#include <stdio.h>

#define DHT_PIN 25

#define LCD_ADDR 0x27
#define SDA_PIN 21
#define SCL_PIN 22
#define LCD_ROWS 16
#define LCD_COLS 2

float convertValue(int16_t val);
float converTemp(int16_t celsius);

void app_main(void) {

  const char *tag = "TEMP_HUMID";
  int16_t temp, humid;
  char tempStr[32], humidStr[32];
  ESP_LOGI(tag, "Starting our temp/humidity readings");
  LCD_init(LCD_ADDR, SDA_PIN, SCL_PIN, LCD_COLS, LCD_ROWS);

  while (1) {
    LCD_clearScreen();

    esp_err_t err = dht_read_data(DHT_TYPE_AM2301, DHT_PIN, &humid, &temp);

    if (err != ESP_OK) {
      ESP_LOGE(tag, "Error: could not read DHT22 Sensor");
    } else {
      // printf("Temp: %d.%d C\n", temp / 10, temp % 10);
      // printf("Humidity: %d.%d%%\n", humid / 10, humid % 10);
      //
      float celsius = convertValue(temp);
      float humidity = convertValue(humid);
      float fahrenheit = converTemp(celsius);

      sprintf(tempStr, "T: %.1fC / %.1fF", celsius, fahrenheit);
      sprintf(humidStr, "Humidity: %.1f%%", humidity);
      LCD_writeStr(tempStr);
      LCD_setCursor(0, 1);
      LCD_writeStr(humidStr);
    }

    vTaskDelay(5000 / portTICK_PERIOD_MS);
  }
}

float convertValue(int16_t val) { return val / 10.0f; }

float converTemp(int16_t celsius) { return celsius * (9.0f / 5.0f) + 32.0f; }