//
// Author: Yves Lafon <ylafon@w3.org>
//
// (c) COPYRIGHT MIT, ERCIM, Keio, Beihang, 2017.
// Please first read the full copyright statement in file COPYRIGHT.html
package org.w3c.css.properties.css3.counterstyle;

import org.w3c.css.util.ApplContext;
import org.w3c.css.util.InvalidParamException;
import org.w3c.css.values.CssExpression;
import org.w3c.css.values.CssIdent;
import org.w3c.css.values.CssTypes;
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/2015/CR-css-counter-styles-3-20150611/#descdef-counter-style-pad
 */
public class CssPad extends org.w3c.css.properties.css.counterstyle.CssPad {

    /**
     * Create a new CssPad
     */
    public CssPad() {
        value = initial;  // this is wrong...
    }

    /**
     * Creates a new CssPad
     *
     * @param expression The expression for this property
     * @throws org.w3c.css.util.InvalidParamException
     *          Expressions are incorrect
     */
    public CssPad(ApplContext ac, CssExpression expression, boolean check)
            throws InvalidParamException {
        CssValue val;
        char op;
        ArrayList<CssValue> values = new ArrayList<>();
        setByUser();

        if (expression.getCount() != 2) {
            throw new InvalidParamException("unrecognize", ac);
        }
        boolean gotint = false;
        boolean gotsymbol = false;

        for (int i = 0; i < 2; i++) {
            val = expression.getValue();
            op = expression.getOperator();
            switch (val.getType()) {
                case CssTypes.CSS_URL:
                case CssTypes.CSS_IMAGE:
                case CssTypes.CSS_STRING:
                    if (gotsymbol) {
                        throw new InvalidParamException("value",
                                val.toString(),
                                getPropertyName(), ac);
                    }
                    values.add(val);
                    gotsymbol = true;
                    break;
                case CssTypes.CSS_IDENT:
                    if (CssIdent.isCssWide((CssIdent) val)) {
                        throw new InvalidParamException("value",
                                val.toString(),
                                getPropertyName(), ac);
                    }
                    if (gotsymbol) {
                        throw new InvalidParamException("value",
                                val.toString(),
                                getPropertyName(), ac);
                    }
                    values.add(val);
                    gotsymbol = true;
                    break;
                case CssTypes.CSS_NUMBER:
                    val.getCheckableValue().checkInteger(ac, this);
                    if (gotint) {
                        throw new InvalidParamException("value",
                                val.toString(),
                                getPropertyName(), ac);
                    }
                    values.add(val);
                    gotint = true;
                    break;
                default:
                    throw new InvalidParamException("value",
                            val.toString(),
                            getPropertyName(), ac);
            }
            if (op != SPACE) {
                throw new InvalidParamException("operator", op,
                        getPropertyName(), ac);
            }
            expression.next();
        }
        value = new CssValueList(values);

    }

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

}