// $Id$
// @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.parser.CssStyle;
import org.w3c.css.properties.css.CssBorderBottomColor;
import org.w3c.css.properties.css.CssBorderLeftColor;
import org.w3c.css.properties.css.CssBorderRightColor;
import org.w3c.css.properties.css.CssBorderTopColor;
import org.w3c.css.util.ApplContext;
import org.w3c.css.util.InvalidParamException;
import org.w3c.css.values.CssExpression;
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 http://www.w3.org/TR/2008/REC-CSS1-20080411/#border-color
 */
public class CssBorderColor extends org.w3c.css.properties.css.CssBorderColor {

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

    /**
     * Set the value of the property<br/>
     * Does not check the number of values
     *
     * @param expression The expression for this property
     * @throws org.w3c.css.util.InvalidParamException
     *          The expression is incorrect
     */
    public CssBorderColor(ApplContext ac, CssExpression expression)
            throws InvalidParamException {
        this(ac, expression, false);
    }

    /**
     * Set the value of the property
     *
     * @param expression The expression for this property
     * @param check      set it to true to check the number of values
     * @throws org.w3c.css.util.InvalidParamException
     *          The expression is incorrect
     */
    public CssBorderColor(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> res = new ArrayList<CssValue>();
        while (res.size() < 4 && !expression.end()) {
            val = expression.getValue();
            op = expression.getOperator();

            switch (val.getType()) {
                case CssTypes.CSS_HASH_IDENT:
                    org.w3c.css.values.CssColor c = new org.w3c.css.values.CssColor();
                    c.setShortRGBColor(ac, val.toString());
                    res.add(c);
                    break;
                case CssTypes.CSS_COLOR:
                    res.add(val);
                    break;
                case CssTypes.CSS_IDENT:
                    if (inherit.equals(val)) {
                        res.add(inherit);
                        break;
                    }
                    res.add(new org.w3c.css.values.CssColor(ac, (String) val.get()));
                    break;
                default:
                    throw new InvalidParamException("unrecognize", ac);
            }
            expression.next();
            if (op != SPACE) {
                throw new InvalidParamException("operator",
                        Character.toString(op),
                        ac);
            }
        }
        // check that inherit is alone
        if (res.size() > 1 && res.contains(inherit)) {
            throw new InvalidParamException("unrecognize", ac);
        }
        value = (res.size() == 1) ? res.get(0) : new CssValueList(res);

        // now assign the computed values...
        // as the property des not exist, we use the defined superclass
        top = new CssBorderTopColor();
        right = new CssBorderRightColor();
        bottom = new CssBorderBottomColor();
        left = new CssBorderLeftColor();

        switch (res.size()) {
            case 1:
                top.value = left.value = right.value = bottom.value = res.get(0);
                break;
            case 2:
                top.value = bottom.value = res.get(0);
                right.value = left.value = res.get(1);
                break;
            case 3:
                top.value = res.get(0);
                right.value = left.value = res.get(1);
                bottom.value = res.get(2);
                break;
            case 4:
                top.value = res.get(0);
                right.value = res.get(1);
                bottom.value = res.get(2);
                left.value = res.get(3);
                break;
            default:
                // can't happen
                throw new InvalidParamException("unrecognize", ac);
        }
    }

    /**
     * Add this property to the CssStyle
     *
     * @param style The CssStyle
     */
    public void addToStyle(ApplContext ac, CssStyle style) {
        org.w3c.css.properties.css.CssBorder cssBorder = ((Css1Style) style).cssBorder;
        cssBorder.borderColor.byUser = byUser;
        if (cssBorder.borderColor.shorthand) {
            style.addRedefinitionWarning(ac, this);
        }
        cssBorder.borderColor.value = value;
        cssBorder.borderColor.top = top;
        cssBorder.borderColor.left = left;
        cssBorder.borderColor.right = right;
        cssBorder.borderColor.bottom = bottom;
        cssBorder.borderColor.shorthand = shorthand;
    }
}