#include <stdio.h>
#include "pico/stdlib.h"
#include "pico/time.h"

#define LED_PIN 26
#define BUTTON_PIN 14 // GPIO 14 for the button

int main() {
    stdio_init_all();
    gpio_init(LED_PIN);
    gpio_set_dir(LED_PIN, GPIO_OUT);
    gpio_init(BUTTON_PIN);
    gpio_set_dir(BUTTON_PIN, GPIO_IN);
    gpio_pull_up(BUTTON_PIN);

    uint32_t start_time = to_ms_since_boot(get_absolute_time());
    uint32_t current_time = start_time;
    uint32_t elapsed_time = 0;
    uint32_t blink_count = 0;
    uint32_t interval = 1000; // 1 second interval
    uint32_t blink_target[] = {30, 20, 10}; // Blink targets for each minute
    bool reverse = false; // Flag to reverse blinking pattern

    while (1) {
        current_time = to_ms_since_boot(get_absolute_time());
        elapsed_time = current_time - start_time;
        uint32_t minute = elapsed_time / (60 * 1000); // Time in minutes

        if (minute >= 3) // Stop after 3 minutes
            break;

        // Check if button is pressed to reverse blinking pattern
        if (gpio_get(BUTTON_PIN) == 0) {
            reverse = !reverse;
            while (gpio_get(BUTTON_PIN) == 0); // Wait until button is released
            // Reset start time and blink count for next minute
            start_time = to_ms_since_boot(get_absolute_time());
            blink_count = 0;
        }

        uint32_t target_index = reverse ? (2 - minute) : minute; // Index for blink_target

        if (blink_count < blink_target[target_index]) {
            gpio_put(LED_PIN, 1); // LED ON
            sleep_ms(100); // LED ON time
            gpio_put(LED_PIN, 0); // LED OFF
            sleep_ms(100); // LED OFF time
            blink_count++;
        } else {
            // Reset start time and blink count for next minute
            start_time = to_ms_since_boot(get_absolute_time());
            blink_count = 0;
        }
    }

    return 0;
}