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package info.bliki.wiki.template;

import info.bliki.wiki.model.IWikiModel;

import java.util.List;

/**
 * A template parser function for {{ #tag: ... }} syntax.
 *
 * See Magic
 * words-Miscellaneous
 */
public class Tag extends AbstractTemplateFunction {
    public final static ITemplateFunction CONST = new Tag();

    @Override
    public String parseFunction(List list, IWikiModel model, char[] src, int beginIndex, int endIndex, boolean isSubst) {
        if (list.size() > 0) {
            String tagName = isSubst ? list.get(0) : parseTrim(list.get(0), model);
            if (list.size() <= 1) {
                return "<" + tagName + "/>";
            } else {
                StringBuilder builder = new StringBuilder(list.size() * 32 + tagName.length() + 10);
                builder.append("<");
                builder.append(tagName);
                String second = isSubst ? list.get(1) : parseTrim(list.get(1), model);
                String attrName;
                String attrValue;
                String content = null;

                int index = second.indexOf('=');
                if (index >= 0) {
                    attrName = second.substring(index + 1).trim();
                    attrValue = second.substring(index + 1).trim();
                    builder.append(" ");
                    builder.append(attrName);
                    builder.append("=\"");
                    builder.append(attrValue);
                    builder.append("\"");
                } else {
                    content = second;
                }

                for (int i = 2; i < list.size(); i++) {
                    String temp = isSubst ? list.get(i) : parseTrim(list.get(i), model);
                    index = temp.indexOf('=');
                    if (index >= 0) {
                        attrName = temp.substring(index + 1).trim();
                        attrValue = temp.substring(index + 1).trim();
                        builder.append(" ");
                        builder.append(attrName);
                        builder.append("=\"");
                        builder.append(attrValue);
                        builder.append("\"");
                    }
                }
                if (content == null) {
                    builder.append("/>");
                } else {
                    builder.append(">");
                    builder.append(content);
                    builder.append("");
                }
                return builder.toString();
            }
        }
        return null;
    }

}