#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;
    }

    /*
    //struct lexer *lex = lex_create("x* sin  (x  ^ 2) * 5.5e+2* cosh (x )");
    //struct lexer *lex = lex_create("-1 + -2 - 3 + 4");
    */
    lex = lex_create(argv[1]);

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

    //if (node) {
    //    double x;
    //    node_debug_print(node);
    //    printf("polygon(");
    //    for (x = -10.0; x < 10.0; x += 0.1) {
    //        printf("(%.2f,%.2f),", x, node_eval(node, x));
    //    }
    //    printf("(10, -1000),(-10,-1000))\n");
    //}

    if (node) {
        FILE *file;
        struct graph_range graph;
        //graph.xmin = -10.0;
        //graph.xmax = 10.0;
        //graph.ymin = -10.0;
        //graph.ymax = 10.0;
        //graph.step = 0.1;

        graph.xmin = -3.14;
        graph.xmax = 3.14;
        graph.ymin = -1;
        graph.ymax = 1;
        graph.step = 0.01;


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

    node_free(node);

    return 0;
}