#include <iostream>
#include <string>
#include <fstream>

#include "Parser.h"
#include "Optimizer.h"
#include "AssemblyGenerator.h"

using namespace std;
using zp::Parser;
using zp::Optimizer;
using zp::AssemblyGenerator;


int main(int argc, char** argv)
{
    string filename = "";
    for (int i = 1; i < argc; i++) {
        string arg = argv[i];
        if (arg == "") {
        }
        else if (arg[0] == '-') {
        }
        else {
            filename = arg;
        }
    }

    istream* in = &cin;
    ostream* out = &cout;

    if (filename != "") {
        in = new ifstream{filename.c_str(), fstream::in};
        out = new ofstream{(filename + ".s").c_str(), fstream::out};
    }

    Parser parser{ *in };
    unique_ptr<zp::Block> ast;

    try {
        ast = parser.parse();
    }
    catch(zp::ParserException& pe) {
        cerr << "Error: " << pe.what() << endl;
        return 1;
    }

    Optimizer optimizer;
    auto ir = ast->accept(optimizer);

    AssemblyGenerator ag{ *out };
    ir->accept(ag);
    ag.finish();

    if (filename != "") {
        dynamic_cast<ifstream*> (in)->close();
        dynamic_cast<ofstream*> (out)->close();
        delete in;
        delete out;
        in = &cin;
        out = &cout;
    }
}