#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <time.h>
#include <unistd.h>
#include <xmmintrin.h>
#include <errno.h>
#include <immintrin.h>
#include <stdint.h>
#include <getopt.h>

#include "helper.h"

// The file "testfile" should lead to this hash: fc982e558db259f298b43cd4c1241c66

void md2_checksum(size_t len, uint8_t* buf) {

}

void md2_hash(size_t len, const uint8_t buf[len], uint8_t out[16]) {

}

static uint8_t* read_file(const char* path, size_t* size) {
    // Read the contents of the file specified by path into a heap-allocated
    // buffer and return a pointer to that buffer.
    FILE* f = fopen(path, "r");
    if(f == NULL) {
        printf("Fopen error: %d\n", errno);
        fclose(f);
        return NULL;
    }

    struct stat statOfFile;
    int status = fstat(fileno(f), &statOfFile);
    if(status == -1) {
        printf("Fstat error: %d\n", errno);
        fclose(f);
        return NULL;
    };

    if((statOfFile.st_mode & S_IFMT) != S_IFREG){
        printf("File is not a regular file!\n");
        fclose(f);
        return NULL;
    }

    uint8_t* data = malloc(statOfFile.st_size);

    size_t bytesRead = fread(data, statOfFile.st_blksize, statOfFile.st_blocks, f);
    // Or: size_t bytesRead = fread(data, sizeof(char), statOfFile.st_size, f);
    if(bytesRead != 0 && !feof(f)) {
        printf("Error reading file!\n");
        fclose(f);
        return NULL;
    }

    fclose(f);

    (*size) = bytesRead;
    return data;
}

int main(int argc, char** argv) {
     
    struct configuration c;
    enum argumentParseResult result = parseArguments(argc, argv, &c);

    switch (result)
    {
    case RESULT_EXIT_SUCCESS:
        return EXIT_SUCCESS;
    case RESULT_EXIT_FAILURE:
        return EXIT_FAILURE;
    default:
        break;
    }

    printf("Hashing file: %s\nUsing implementation: %d, doing benchmark: %d, benchmark cycles: %d\n", c.filename, c.implementationToUse, c.doBenchmark, c.benchmarkingCycles);

    return 0;
}