#include "skein.h"
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>

static uint8_t *read_file(const char *path, size_t *length) {
    FILE *file = fopen(path, "rb");
    if (file == NULL) {
        return NULL;
    }
    fseek(file, 0, SEEK_END);
    long size = ftell(file);
    rewind(file);
    uint8_t *bytes = malloc((size_t)size);
    if (size < 0 || bytes == NULL ||
        fread(bytes, 1, (size_t)size, file) != (size_t)size) {
        return NULL;
    }
    fclose(file);
    *length = (size_t)size;
    return bytes;
}

int main(void) {
    size_t message_len;
    size_t rust_hash_len;
    uint8_t *message = read_file("fixtures/message.bin", &message_len);
    uint8_t *rust_hash = read_file("fixtures/rust-skein256.bin", &rust_hash_len);
    if (message == NULL || rust_hash == NULL || rust_hash_len != 32) {
        fprintf(stderr, "Could not read Skein fixtures\n");
        return 1;
    }

    uint8_t extension_hash[32];
    Skein_256_Ctxt_t context;
    Skein_256_Init(&context, 256);
    Skein_256_Update(&context, message, message_len);
    Skein_256_Final(&context, extension_hash);

    int equal = 1;
    for (size_t i = 0; i < sizeof(extension_hash); i++) {
        if (extension_hash[i] != rust_hash[i]) {
            equal = 0;
            break;
        }
    }
    printf("PHP-Skein-Hash output matches Contractless Rust: %s\n",
           equal ? "true" : "false");

    free(rust_hash);
    free(message);
    return equal ? 0 : 2;
}