import java.nio.file.Files;
import java.nio.file.Paths;
import frontend.lexer.Lexer;
import frontend.lexer.TokenStream;
import frontend.parser.Parser;
import midend.Midend;
import midend.errorhandle.ErrorHandler;

import error.Errors;
import midend.symbol.SymbolManager;

public class Compiler {
    public static void main(String[] args) {
        Errors errors = new Errors();
        try {
            String content = new String(Files.readAllBytes(Paths.get("testfile.txt")));
            String llvmFile = "llvm_ir.txt";
            String errorFile = "error.txt";
            Lexer lexer = new Lexer(content);
            lexer.lex(errors);
            TokenStream ts = new TokenStream(lexer.getTokens());
            Parser parser = new Parser(ts);
            parser.parse(errors);
            ErrorHandler errorHandler = new ErrorHandler(parser.getCompUnit());
            errorHandler.visit(errors);
            // for (int i : SymbolManager.getSequence()) {
            //     System.out.print(i + " ");
            // }
            // System.out.println();  // TODO:debug
            if (errors.size() > 0) {
                StringBuilder sb = errors.toStringBuilder();
                Files.write(Paths.get(errorFile), sb.toString().getBytes());
            } else {
                Midend midend = new Midend(parser.getCompUnit());
                midend.generateLLvmIr();
                midend.writeToFile(llvmFile);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}