//
// Author: Yves Lafon <ylafon@w3.org>
//
// (c) COPYRIGHT MIT, ERCIM, Keio, Beihang, 2021.
// Please first read the full copyright statement in file COPYRIGHT.html
package org.w3c.css.properties.css3;

import org.w3c.css.util.ApplContext;
import org.w3c.css.util.InvalidParamException;
import org.w3c.css.values.CssExpression;
import org.w3c.css.values.CssValue;
import org.w3c.css.values.CssValueList;

import java.util.ArrayList;

import static org.w3c.css.values.CssOperator.SPACE;

/**
 * @spec https://www.w3.org/TR/2018/WD-css-logical-1-20180827/#propdef-inset
 */
public class CssInset extends org.w3c.css.properties.css.CssInset {

    /**
     * Create a new CssInset
     */
    public CssInset() {
        value = initial;
    }

    /**
     * Creates a new CssInset
     *
     * @param expression The expression for this property
     * @throws InvalidParamException Expressions are incorrect
     */
    public CssInset(ApplContext ac, CssExpression expression, boolean check)
            throws InvalidParamException {
        if (check && expression.getCount() > 4) {
            throw new InvalidParamException("unrecognize", ac);
        }
        setByUser();
        CssValue val;
        char op;
        ArrayList<CssValue> v = new ArrayList<>();

        op = expression.getOperator();
        while(!expression.end()) {
            v.add(CssTop.parseTop(ac, expression, false, this));
            if (op != SPACE) {
                throw new InvalidParamException("operator",
                        Character.toString(op), ac);
            }
        }

        if (v.size() == 1) {
            value = v.get(0);
        } else {
            if (v.contains(inherit)) {
                throw new InvalidParamException("value", inherit.toString(),
                        getPropertyName(), ac);
            }
            value = new CssValueList(v);
        }
    }


    public CssInset(ApplContext ac, CssExpression expression)
            throws InvalidParamException {
        this(ac, expression, false);
    }
}