#include "token.h"

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

int main(int argc, const char **argv) {
    if (argc < 2) {
        printf("Not enough args!\n");
        return 1;
    }
    FILE *in = fopen(argv[1], "r");
    fseek(in, 0, SEEK_END);
    off_t length = ftello(in);
    rewind(in);
    char *text = malloc(length);
    fread(text, 1, length, in);
    fclose(in);
    TokenStream stream;
    ParseError err;
    Token token;
    token_stream_init(&stream, text, length);
    while (!token_stream_is_eof(&stream)) {
        token_stream_next(&stream, &token, &err);
        if (parse_error_is_set(&err)) {
            printf("Error at %zu:%zu: %s\n", err.pos.line, err.pos.column,
                   err.message);
            free(text);
            return 1;
        } else {
            char *ts = malloc(token.length + 1);
            memcpy(ts, &text[token.pos.offset], token.length);
            ts[token.length] = '\0';
            printf("%s: %s\n", token_type_to_string(token.type), ts);
            free(ts);
        }
    }
    free(text);
    return 0;
}