package com.jantuomi.interpreter.main.exception;


import java.util.HashMap;
import java.util.Map;

/**
 * Created by jan on 12.6.2016.
 */
public class InterpreterException extends Exception {

    public enum ExceptionType {
        IllegalTokenError,
        UnknownOperatorError,
        SyntaxError,
        TypeError,
        ArgumentError,
        UndeclaredSymbolError
    }

    public static Map<ExceptionType, String> errorTexts = new HashMap<>();

    static {
        errorTexts.put(ExceptionType.IllegalTokenError, "Illegal token %s found.");
        errorTexts.put(ExceptionType.UnknownOperatorError, "Unexpected operator %s found.");
        errorTexts.put(ExceptionType.SyntaxError, "Unexpected %s.");
        errorTexts.put(ExceptionType.TypeError, "Incompatible types %s and %s.");
        errorTexts.put(ExceptionType.ArgumentError, "Function %s requires %s arguments.");
        errorTexts.put(ExceptionType.UndeclaredSymbolError, "No symbol %s defined.");
    }

    private ExceptionType exceptionType;

    public InterpreterException(ExceptionType exceptionType, int line, String... args) {
        super(formatMessage(exceptionType.toString() + ": " + what(exceptionType), line, args), null, false, false);
        this.exceptionType = exceptionType;
    }

    private static String formatMessage(String message, int line, String... args) {

        message = String.format(message, args);
        return String.format("\nline %d: ", line) + message;
    }

    public static String what(ExceptionType type) {
        return errorTexts.get(type);
    }
}