// $Id$
// Author: Yves Lafon <ylafon@w3.org>
//
// (c) COPYRIGHT MIT, ERCIM and Keio University, 2012.
// Please first read the full copyright statement in file COPYRIGHT.html
package org.w3c.css.properties.css1;

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.CssNumber;
import org.w3c.css.values.CssTypes;
import org.w3c.css.values.CssValue;

/**
 * @spec http://www.w3.org/TR/2008/REC-CSS1-20080411/#font-weight
 */
public class CssFontWeight extends org.w3c.css.properties.css.CssFontWeight {

    public static final CssIdent[] allowed_values;
    static final String[] _allowed_values = {"normal", "bold", "bolder", "lighter"};

    static {
        allowed_values = new CssIdent[_allowed_values.length];
        for (int i = 0; i < allowed_values.length; i++) {
            allowed_values[i] = CssIdent.getIdent(_allowed_values[i]);
        }
    }

    public static final CssIdent getAllowedValue(CssIdent ident) {
        for (CssIdent id : allowed_values) {
            if (id.equals(ident)) {
                return id;
            }
        }
        return null;
    }

    /**
     * Create a new CssFontWeight
     */
    public CssFontWeight() {
    }

    /**
     * Creates a new CssFontWeight
     *
     * @param expression The expression for this property
     * @throws org.w3c.css.util.InvalidParamException
     *          Expressions are incorrect
     */
    public CssFontWeight(ApplContext ac, CssExpression expression, boolean check)
            throws InvalidParamException {
        if (check && expression.getCount() > 1) {
            throw new InvalidParamException("unrecognize", ac);
        }
        setByUser();

        CssValue val;
        char op;

        val = expression.getValue();
        op = expression.getOperator();

        switch (val.getType()) {
            case CssTypes.CSS_NUMBER:
                CssNumber num = (CssNumber) val;
                switch (num.getInt()) {
                    case 100:
                    case 200:
                    case 300:
                    case 400:
                    case 500:
                    case 600:
                    case 700:
                    case 800:
                    case 900:
                        value = num;
                        break;
                    default:
                        throw new InvalidParamException("value",
                                val.toString(),
                                getPropertyName(), ac);
                }
                break;
            case CssTypes.CSS_IDENT:
                value = getAllowedValue((CssIdent) val);
                if (value == null) {
                    throw new InvalidParamException("value",
                            val.toString(),
                            getPropertyName(), ac);
                }
                break;
            default:
                throw new InvalidParamException("value",
                        expression.getValue().toString(),
                        getPropertyName(), ac);
        }
        expression.next();
    }

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

}