#include "arg.h"
#include "cgen.h"
#include "lex.h"
#include "parse.h"
#include <errno.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>

int main(int argc, char *argv[])
{
    const char *fname = "<standard input>";
    struct args args = {.name = *argv};
    struct lex l = {0};
    struct ast a = {0};
    struct cgen c = {0};
    FILE *f = stdin;
    int ret = EXIT_FAILURE;

    if (argc == 1)
    {
        fprintf(stderr, "%s [options ...] file\n", *argv);
        goto end;
    }

    arg_defaults(&args);

    for (int i = 1; i < argc; i++)
        if (arg(&args, argv[i]))
            goto end;

    if (args.src)
    {
        if (!(f = fopen(args.src, "rb")))
        {
            fprintf(stderr, "%s: fopen(3) %s: %s\n", *argv, args.src,
                strerror(errno));
            goto end;
        }

        fname = args.src;
    }

    l.loc.f = fname;
    l.args = a.args = &args;

    if (lex(&l, f) || parse(&l, &a) || cgen(&a, &c))
        goto end;

    ret = EXIT_SUCCESS;

end:
    if (f && f != stdin && fclose(f))
    {
        perror("fclose(3)");
        ret = EXIT_FAILURE;
    }

    cgen_free(&c);
    ast_free(&a);
    lex_free(&l);
    arg_free(&args);
    return ret;
}