/* --------------------------------------------------------------
   Application: 01 - Rev1
   Release Type: Baseline Multitask Skeleton Starter Code 
   Class: Real Time Systems - Su 2025
   Modifications: Added timing verification, test cases, and healthcare theme
---------------------------------------------------------------*/
#include <stdio.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "driver/gpio.h"

#define LED_PIN GPIO_NUM_2

// [MODIFIED BY AI] - Added timestamp logging
void blink_task(void *pvParameters) {
    bool led_on = false;
    while (1) {
        gpio_set_level(LED_PIN, led_on ? 1 : 0);
        
        // [ADDED BY AI] - Timing verification and healthcare theme
        printf("HEARTBEAT %s at %lums\n",   // [ADDED BY AI] - Medical context
              led_on ? "ON" : "OFF", 
              (unsigned long)(xTaskGetTickCount() * portTICK_PERIOD_MS));
        
        led_on = !led_on;
        vTaskDelay(pdMS_TO_TICKS(250));
    }
    vTaskDelete(NULL);
}

// [MODIFIED BY AI] - Added healthcare context and timing info
void print_task(void *pvParameters) {
    while (1) {
        // [ADDED BY AI] - Healthcare-themed message with timestamp
        printf("PATIENT STATUS: HR=72bpm, BP=120/80 (System Time: %lums)\n",
              xTaskGetTickCount()*portTICK_PERIOD_MS);
        
        vTaskDelay(pdMS_TO_TICKS(10000));

        // [ADDED BY AI] - Test case (uncomment to simulate priority inversion)
        // vTaskDelay(pdMS_TO_TICKS(5000)); // Extra delay test
    }
    vTaskDelete(NULL);
}

void app_main() {
    gpio_reset_pin(LED_PIN);
    gpio_set_direction(LED_PIN, GPIO_MODE_OUTPUT);
    
    // [MODIFIED BY AI] - Added priority test case (try priority=2 for print task)
    xTaskCreate(blink_task, "Heartbeat Monitor", 2048, NULL, 1, NULL); // [ADDED BY AI] - Renamed for theme
    xTaskCreate(print_task, "Vitals Logger", 2048, NULL, 1, NULL);     // [ADDED BY AI] - Renamed for theme
}

/* [ADDED BY AI] ************************************************
   Superloop Test Implementation (for comparison)
   Uncomment to demonstrate timing failures:
   
   #include "esp_timer.h"
   void app_main() {
       bool led_on = false;
       uint64_t last_blink = 0;
       uint64_t last_print = 0;
       
       gpio_reset_pin(LED_PIN);
       gpio_set_direction(LED_PIN, GPIO_MODE_OUTPUT);
       
       while(1) {
           uint64_t now = esp_timer_get_time() / 1000;
           
           if(now - last_blink >= 250) {
               gpio_set_level(LED_PIN, led_on ? 1 : 0);
               led_on = !led_on;
               last_blink = now;
           }
           
           if(now - last_print >= 10000) {
               printf("Patient vitals...\n");
               // for(int i=0; i<1e6; i++) {} // [ADDED BY AI] - Uncomment to break timing
               last_print = now;
           }
       }
   }
*****************************************************************/