import ast.Program;
import errorhandler.ErrorHandler;
import introspector.model.IntrospectorModel;
import introspector.view.IntrospectorTree;
import org.antlr.v4.runtime.CharStream;
import org.antlr.v4.runtime.CharStreams;
import org.antlr.v4.runtime.CommonTokenStream;
import parser.CmmLexer;
import parser.CmmParser;
import visitor.codegeneration.*;
import visitor.identification.IdentificationVisitor;
import visitor.semantic.TypeCheckingVisitor;

public class Main {

    public static void main(String... args) throws Exception {
        if (args.length < 1) {
            System.err.println("Please, pass me the input file.");
            return;
        }

        // create a lexer that feeds off of input CharStream
        CharStream input = CharStreams.fromFileName(args[0]);
        CmmLexer lexer = new CmmLexer(input);
        // create a parser that feeds off the tokens buffer
        CommonTokenStream tokens = new CommonTokenStream(lexer);
        CmmParser parser = new CmmParser(tokens);
        //parser.program();

        Program ast = parser.program().ast;

        ast.accept(new IdentificationVisitor(), null);
        ast.accept(new TypeCheckingVisitor(), null);
        ast.accept(new OffsetVisitor(), null);

        CodeGenerator cg = new CodeGenerator(args[0], args[1]);
        ExecuteCGVisitor execute = new ExecuteCGVisitor(cg);
        ValueCGVisitor value = new ValueCGVisitor(cg);
        AddressCGVisitor address = new AddressCGVisitor(cg);

        execute.setExecuteCGVisitor(execute);
        execute.setValueCGVisitor(value);
        execute.setAddressCGVisitor(address);

        value.setExecuteCGVisitor(execute);
        value.setValueCGVisitor(value);
        value.setAddressCGVisitor(address);

        address.setExecuteCGVisitor(execute);
        address.setValueCGVisitor(value);
        address.setAddressCGVisitor(address);

        ast.accept(execute, null);

        if (ErrorHandler.getInstance().anyError())
            ErrorHandler.getInstance().showErrors(System.err);
        else {
            IntrospectorModel model = new IntrospectorModel("Program", ast);
            new IntrospectorTree("Introspector", model);
        }
    }


}