#include "runner.h"


int main(int argc, char *argv[]) {
    char *check_input;
    int token;
    //check_input can be compared to INVALID_ARG and DIFF_ARG to determine if -tok and holds the generated file name if it is
    check_input = is_tok(argc, argv);
    FILE * output = fopen(check_input, "w");

    if (check_input == INVALID_ARG) {
        return -1;
    }
    
    while (0 != (token = yylex())) {
        if (check_input != DIFF_ARG) {
            fprintf(output, "%d %d %3d \"%s\"\n", line_number, column_number, token, yytext);
        }        
    }

    return 0;
}

char *is_tok(int argc, char *argv[]) {
    if (argc == 3 && strcmp("-tok", argv[1])) {
        char *input_prog = argv[2];
        int file_len = strlen(input);
        //check that input program is a .alpha file
        if (strcmp(".alpha", input_prog[file_len - ALPHA_OFFSET]) != 0) {
            return INVALID_ARG;
        }
        char *FILE_tok[file_len - ALPHA_OFFSET + TOK_LEN]; 
        strncpy(input, FILE_tok, file_len - ALPHA_OFFSET); //copy name of prog before .alpha
        strcpy(".tok", FILE_tok[file_len - ALPHA_OFFSET]); //add .tok to end of file name
        return FILE_tok;
    }
    return DIFF_ARG;
}