#include <stdio.h>
#include "freertos/FreeRTOS.h"
#include "driver/gpio.h"
#include "freertos/task.h"


// Define the GPIO pins
#define BUTTON_PIN 22 // Connected to the push button (equivalent to D7)
#define RELAY_PIN 2   // Connected to the relay module (equivalent to D1)

// Debounce parameters
#define DEBOUNCE_DELAY_MS 50

int relayState = 0; // Current state of the relay (0 = off, 1 = on)

void initialize_gpio() {
    // Configure GPIO pins
    esp_rom_gpio_pad_select_gpio(BUTTON_PIN);
    gpio_set_direction(BUTTON_PIN, GPIO_MODE_INPUT);
    gpio_set_pull_mode(BUTTON_PIN, GPIO_PULLUP_ONLY);

    esp_rom_gpio_pad_select_gpio(RELAY_PIN);
    gpio_set_direction(RELAY_PIN, GPIO_MODE_OUTPUT);
    printf("\n\ngpio initialization is completed\n");
}

void debounce_delay() {
    vTaskDelay(DEBOUNCE_DELAY_MS / portTICK_PERIOD_MS);
}

void app_main() {
    // Initialize GPIO pins
    initialize_gpio();

    int lastButtonState = 1; // Previous state of the button (initialized to HIGH)
    int currentButtonState;  // Current state of the button

    while (1) {
        // Read the current state of the button
        currentButtonState = gpio_get_level(BUTTON_PIN);

        // Check for button press
        if (currentButtonState != lastButtonState) {
            // Delay for debounce
            debounce_delay();

            // Read the button state again to confirm
            currentButtonState = gpio_get_level(BUTTON_PIN);

            // If the button state is stable (after debounce), proceed
            if (currentButtonState != lastButtonState) {
                // Button state has changed
                lastButtonState = currentButtonState;

                // If the button is pressed
                if (currentButtonState == 0) {
                    // Toggle relay state
                    relayState = !relayState;

                    // Control relay
                    gpio_set_level(RELAY_PIN, relayState);

                    // Print message
                    printf("The button is pressed\n");
                }
            }
        }

        // Update last button state
        lastButtonState = currentButtonState;

        // Delay before next iteration
        vTaskDelay(10 / portTICK_PERIOD_MS); // Poll button state
    }
}