package frontend.ast.func;

import java.util.ArrayList;

import frontend.ast.Node;
import frontend.ast.SyntaxType;
import frontend.lexer.TokenStream;
import frontend.lexer.TokenType;
import error.Errors;
import error.Error;
import error.ErrorType;
import frontend.ast.token.TokenNode;
import frontend.ast.exp.Exp;
import midend.symbol.FuncSymbol;

public class FuncRParams extends Node {
    public FuncRParams(TokenStream ts) {
        super(SyntaxType.FUNC_REAL_PARAM_S, ts);
    }

    public void parse(Errors errors) {
        while (true) {
            Exp ep = new Exp(ts);
            ep.parse(errors);
            addChild(ep);
            if (getCurrToken().getType() == TokenType.COMMA) {
                addChild(new TokenNode(ts)); // comma
            } else {
                break;
            }
        }
    }

    public int getParamNum() {
        return (getChildren().size() + 1) / 2;
    }

    public void checkParamType(FuncSymbol funcSymbol, Errors errors, int line) {
        int fparaNum = funcSymbol.getParamNum();
        int rparaNum = getParamNum();
        int size = rparaNum < fparaNum ? rparaNum : fparaNum;
        for (int i = 0; i < size; i++) {
            Exp exp = (Exp) getChild(i * 2);
            if (exp.getType() != funcSymbol.getParamType(i)) {
                errors.addError(new Error(line, ErrorType.e));
            }
        }
    }

    public ArrayList<Exp> getParamList() {
        ArrayList<Exp> paramList = new ArrayList<Exp>();
        for (int i = 0; i < getChildren().size(); i += 2) {
            paramList.add((Exp) getChild(i));
        }
        return paramList;
    }
}