#include <stdio.h>
#include <stdlib.h>
#include "lex.h"
#include "parser.h"
#include "ps_graph.h"

int main(int argc, char *argv[]) { 

    struct lexer *lex;
    struct expr_node *node;

    if (argc < 2) {
        printf("Usage: %s <expression>\n", argv[0]);
        return 1;
    }

    lex = lex_create(argv[1]);

    node = parse_expression(lex);
    lex_free(lex);

    if (node) {
        FILE *file;
        struct graph_range graph;

        graph.xmin = -20.0;
        graph.xmax = 20.0;
        graph.ymin = -20.0;
        graph.ymax = 20.0;
        graph.step = 0.01;

        file = fopen("out.ps", "w");
        ps_export_graph(file, node, &graph);
        fclose(file);

        file = fopen("graph.dot", "w");
        node_debug_print_gv(node, file);
        fclose(file);

        node_free(node);
    }


    return 0;
}