import std.stdio;
import std.string;
import std.file;
import std.conv;
import std.getopt;

/*
import parser;
import dbg;
import chunk;
import compiler;
*/
import vm;
import dbg;

/*
import compiler;
import obj;
import dbg;
import chunk;
import vm;
*/


void repl(bool noCore) {
    REPL = true;
    VM vm = new VM();
    interpret(getCore(noCore), vm);
	while(true) {

		write("> ");
		string input = strip(stdin.readln());

        if (input.length == 0) {
            continue;
        }

        interpret(input, vm);
	}
}

string readFile(string fname) {

        File f = File(fname, "r");

        char[] ret = [];
        while (!f.eof()) {
                ret = ret ~ f.readln();
        }
        f.close();
        return to!string(ret);
}

string getCore(bool noCore) {
    if (noCore) {
        return "";
    } else {
        return readFile("core.neb");
    }
}

int main(string[] args) {
    bool noCore = false;
    getopt(args, "no-core", &noCore, "d", &DEBUG);

    if (args.length <= 1) {
        repl(noCore);
    } else {
        string fname = args[1];

        if (!exists(fname)) {
                writeln("file doesn't exist: ", fname);
                return 1;
        }

        VM vm = new VM();
        interpret(getCore(noCore), vm);

        string data = readFile(fname);

        interpret(data, vm);
    }
    return 0;
}