// Include the most common headers from the C standard library
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>

// Include the main libnx system header, for Switch development
#include <switch.h>

// Main program entrypoint
int main(int argc, char* argv[])
{
    // This example uses a text console, as a simple way to output text to the screen.
    // If you want to write a software-rendered graphics application,
    //   take a look at the graphics/simplegfx example, which uses the libnx Framebuffer API instead.
    // If on the other hand you want to write an OpenGL based application,
    //   take a look at the graphics/opengl set of examples, which uses EGL instead.
    consoleInit(NULL);

    // Other initialization goes here.
    printf("Hello World!\n");
    printf("This is a stopwatch\n\n\n");
    printf("**Press 'B' to start.\n");
    printf("**Press 'A' to pause.\n");
    printf("**Press '+' to exit.\n");
    int nSec;
    int nMin;
    int nHrs;
    int nDay;

    struct timespec start_time, end_time;
    clock_gettime(CLOCK_REALTIME, &start_time);

    // Main loop
    while (appletMainLoop()) // Start loop A
    {
        hidScanInput();
        // hidKeysDown returns information about which buttons have been
        // just pressed in this frame compared to the previous one
        u64 kDown = hidKeysDown(CONTROLLER_P1_AUTO);    // define kDown (press a button)
        u64 kHeld = hidKeysHeld(CONTROLLER_P1_AUTO);    // define kHeld (hold a button)

        //Exit:
        if (kDown & KEY_PLUS) // If + is pressed then:
            break;            // End loop A and exit application

        // Start:
        if (kDown & KEY_B) // If B is pressed
            {
                while (1) // Start loop B
                {
                    hidScanInput();
                    u64 kDown = hidKeysDown(CONTROLLER_P1_AUTO); // define kDown (press a button)
                    u64 kHeld = hidKeysHeld(CONTROLLER_P1_AUTO); // define kHeld (hold a button)

                    clock_gettime(CLOCK_REALTIME, &end_time);
                    nSec =  (end_time.tv_sec - start_time.tv_sec) + (end_time.tv_nsec - start_time.tv_nsec) /1000000000.0;
                    nMin =  (nSec/60);
                    nHrs =  (nMin/60);
                    nDay =  (nHrs/24);
                    printf("\r");   // Print new line
                    printf("Elapsed: %i Days & %i:%i:%f \r", nDay, nHrs%24, nMin%60, nSec%60); // Print new time
                    consoleUpdate(NULL);// Update the console, sending a new frame to the display
                    // Stop:
                    if (kDown & KEY_A)  // If A is pressed then
                        break;          // End loop B and return to loop A
                } // End loop B

                if (kDown & KEY_B)
                {
                    printf("Lap time: %f\n", (nSec/60) % 60); // Print time
                    if (kDown); // Wait for input
                }
                else break; // End loop B and exit application if B is not pressed
            }; // Stop timer
        printf("Final Time %f\r", nSec); //display final time

        consoleUpdate(NULL);    // Update the console, sending a new frame to the display
    } // End loop A



/* =============================== END ======================================= */

    printf("\n Goodbye."); // Say goodbye before exiting. (very important!)
    consoleUpdate(NULL);
    svcSleepThread(1e+9L);
    // Deinitialize and clean up resources used by the console (important!)
    consoleExit(NULL);
    return 0;
}