#include <stdlib.h>
#include <stdio.h>

#include "finalize.h"
#include "lexer.h"
#include "parser.h"

void
printHeader(FILE *out)
{
    fprintf(out, "\\documentclass[preview, margin=0.2cm]{standalone}\n");
    fprintf(out, "\\usepackage{amsmath}\n");
    fprintf(out, "\\usepackage{forest}\n");
    fprintf(out, "\\begin{document}\n");
}

void
printFooter(FILE *out)
{
    fprintf(out, "\\end{document}\n");
}

void
usage(const char *prg)
{
    fprintf(stderr, "usage: %s [out]\n", prg);
    finalizeExit(1);
}

int
main(int argc, char *argv[])
{
    FILE *out = 0;

    if (argc > 2) {
        usage(argv[0]);
    } else if (argc == 2) {
        out = fopen(argv[1], "w");
        if (!out) {
            fprintf(stderr, "can not open output file %s\n", argv[1]);
            finalizeExit(1);
        }
    }

    if (out) {
        setParserLog(out);
        printHeader(out);
    }

    getToken();
    parse();

    if (out) {
        printFooter(out);
        fclose(out);
    }
    finalize();
}