package frontend.ast.decl;

import error.Errors;
import error.ErrorType;

import java.util.ArrayList;

import error.Error;
import frontend.ast.Node;
import frontend.ast.SyntaxType;
import frontend.ast.token.TokenNode;
import frontend.lexer.TokenStream;
import frontend.lexer.TokenType;

public class ConstDecl extends Node {
    public ConstDecl(TokenStream ts) {
        super(SyntaxType.CONST_DECL, ts);
    }

    public void parse(Errors errors) {
        TokenNode constkk = new TokenNode(this.ts);
        addChild(constkk);
        TokenNode intkk = new TokenNode(this.ts);
        addChild(intkk);
        while (true) {
            ConstDef cdef = new ConstDef(this.ts);
            cdef.parse(errors);
            addChild(cdef);
            if (getCurrToken().getType() != TokenType.COMMA) {
                break;
            } else {
                TokenNode comma = new TokenNode(this.ts);
                addChild(comma);
            }
        }
        if (getCurrToken().getType() != TokenType.SEMICN) {
            errors.addError(new Error(this.ts.peek(-1).getLine(), ErrorType.i));
        } else {
            TokenNode semicoln = new TokenNode(this.ts);
            addChild(semicoln);
        }
    }

    public ArrayList<ConstDef> GetConstDefs() {
        ArrayList<ConstDef> constDefs = new ArrayList<>();
        for (int i = 2; i < getChildren().size(); i += 2) {
            constDefs.add((ConstDef) getChild(i));
        }
        return constDefs;
    }
}