#include <stdio.h>

#include "as_tokenizer.h"
#include "as_analyzer.h"
#include "as_parser.h"
#include "as_codegen.h"
#include "utils.h"

result main_impl(int argc, char** argv) {
    if (argc != 3) {
        return err("usage: fvm-as <input_file> <output_file>");
    }
    struct allocator * alct = new_allocator();
    FILE *fp = fopen(argv[1], "r");
    token_stream * ts = new_token_stream(alct, fp);
    prog* prog = unwrap(parse_prog(alct, ts));
    sym_table symtbl = analyze_prog(alct, prog);
    bytearray* output = unwrap(codegen(alct, prog, symtbl));
    fclose(fp);

    fp = fopen(argv[2], "wb");
    if (fp == NULL) {
        return err("open output file failed.");
    }
    int ret  =fwrite(output->buf, 1, output->len, fp);
    if (ret != output->len) {
        return err("write output file failed.");
    }
    fclose(fp);

    delete_allocator(alct);
    return ok(NULL);
}

int main(int argc, char** argv) {
    result result = main_impl(argc, argv);
    if (result.errmsg != NULL) {
        fprintf(stderr, "%s\n", result.errmsg);
        return -1;
    }
    return 0;
}