#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include "mjs.h"

char* read_file_to_str(char* fname) {
    char * buffer = 0;
    long length;
    FILE * f = fopen(fname, "rb");
    if (f) {
        fseek(f, 0, SEEK_END);
        length = ftell (f);
        fseek(f, 0, SEEK_SET);
        buffer = malloc(length+1);
        if (buffer) {
            fread (buffer, 1, length, f);
        }
        fclose (f);
    }
    buffer[length] = 0;
    return buffer;
}

void foo(int x) {
    printf("Hello %d!\n", x);
}

void *my_dlsym(void *handle, const char *name) {
    if (strcmp(name, "foo") == 0) return foo;
    return NULL;
}

int main(int argc, char** argv) {
    if (argc < 2) {
      printf("usage: %s <js_file>\n", argv[0]);
      exit(1);
    }
    char* content = read_file_to_str(argv[1]);
    // printf("content:\t%s\n", content);
    struct mjs *mjs = mjs_create();
    mjs_set_ffi_resolver(mjs, my_dlsym);
    mjs_err_t res = mjs_exec(mjs, content, NULL);
    // printf("exec res is : %d\n", res);
    mjs_destroy(mjs);
    free(content);
    return res;
}