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

#define LED_PIN  5
#define SWITCH1_PIN 25
#define SWITCH2_PIN 26

SemaphoreHandle_t accessSemaphore;

void switch1_isr_handler(void* arg) 
{
    xSemaphoreGiveFromISR(accessSemaphore, NULL);
}

void switch2_isr_handler(void* arg) 
{
    xSemaphoreGiveFromISR(accessSemaphore, NULL);
}
void task1(void* pvParameters) 
{
    while(1) 
    {
        if (gpio_get_level(SWITCH1_PIN)) 
        {
            if (xSemaphoreTake(accessSemaphore, portMAX_DELAY)==pdTRUE) 
            {
            	 
                gpio_set_level(LED_PIN, 1);
                printf("LED turning ON...\n");
                vTaskDelay(pdMS_TO_TICKS(5000));
                gpio_set_level(LED_PIN, 0);
                printf("LED turning OFF...\n");
                xSemaphoreGive(accessSemaphore);
            }
        }
        
        vTaskDelay(pdMS_TO_TICKS(1000));
    }
    
}

void task2(void* pvParameters) 
{
    while(1) 
    {
        if (gpio_get_level(SWITCH2_PIN)) 
        {
            if (xSemaphoreTake(accessSemaphore, portMAX_DELAY)==pdTRUE) 
            {
                for (int i = 0; i < 6; i++) 
                {
                    gpio_set_level(LED_PIN, 1);
                    vTaskDelay(pdMS_TO_TICKS(1000));
                    gpio_set_level(LED_PIN, 0);
                    vTaskDelay(pdMS_TO_TICKS(1000));
                }
                xSemaphoreGive(accessSemaphore);
            }
        }
        vTaskDelay(pdMS_TO_TICKS(100));
    }
}

void app_main() 
{
    accessSemaphore = xSemaphoreCreateMutex();

    esp_rom_gpio_pad_select_gpio(LED_PIN);
    esp_rom_gpio_pad_select_gpio(SWITCH1_PIN);
    esp_rom_gpio_pad_select_gpio(SWITCH2_PIN);
    gpio_set_direction(LED_PIN, GPIO_MODE_OUTPUT);
    gpio_set_direction(SWITCH1_PIN, GPIO_MODE_INPUT);
    gpio_set_direction(SWITCH2_PIN, GPIO_MODE_INPUT);

    gpio_set_pull_mode(SWITCH1_PIN, GPIO_PULLUP_ONLY);
    gpio_set_pull_mode(SWITCH2_PIN, GPIO_PULLUP_ONLY);

    gpio_install_isr_service(ESP_INTR_FLAG_LEVEL1);
    gpio_isr_handler_add(SWITCH1_PIN, switch1_isr_handler, NULL);

    xTaskCreate(task1, "Task1", 1024, NULL, 1, NULL);
    xTaskCreate(task2, "Task2", 1024, NULL, 2, NULL);
}