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The XSLT and XQuery Processor
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////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Copyright (c) 2018-2023 Saxonica Limited
// This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0.
// If a copy of the MPL was not distributed with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
// This Source Code Form is "Incompatible With Secondary Licenses", as defined by the Mozilla Public License, v. 2.0.
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

package net.sf.saxon.style;

import net.sf.saxon.om.*;
import net.sf.saxon.trans.XPathException;
import net.sf.saxon.type.SchemaType;
import net.sf.saxon.type.Type;

/**
 * An xsl:stylesheet or xsl:transform element in the stylesheet. 

 * Note this element represents a stylesheet module, not necessarily
 * the whole stylesheet. However, much of the functionality (and the fields)
 * are relevant only to the top-level module.
 */

public class XSLStylesheet extends XSLModuleRoot {

    @Override
    public void initialise(NodeName elemName, SchemaType elementType, AttributeMap atts, NodeInfo parent, int sequenceNumber) {
        super.initialise(elemName, elementType, atts, parent, sequenceNumber);
        processDefaultCollationAttribute();
    }

    @Override
    protected boolean mayContainParam() {
        return true;
    }


    /**
     * Prepare the attributes on the stylesheet element
     */

    @Override
    protected void prepareAttributes() {

        processDefaultCollationAttribute();
        processDefaultMode();
        String inputTypeAnnotationsAtt = null;
        for (AttributeInfo att : attributes()) {
            NodeName attName = att.getNodeName();
            String f = attName.getDisplayName();
            String value = att.getValue();
            switch (f) {
                case "version":
                    // already processed
                    break;
                case "id":
                    //
                    break;
                case "extension-element-prefixes":
                    //
                    break;
                case "exclude-result-prefixes":
                    //
                    break;
                case "input-type-annotations":
                    inputTypeAnnotationsAtt = value;
                    break;
                default:
                    checkUnknownAttribute(attName);
                    break;
            }
        }
        if (version == -1 && (getParent() == null || getParent().getNodeKind() == Type.DOCUMENT)) {
            reportAbsence("version");
        }

        if (inputTypeAnnotationsAtt != null) {
            switch (inputTypeAnnotationsAtt) {
                case "strip":
                    //setInputTypeAnnotations(ANNOTATION_STRIP);
                    break;
                case "preserve":
                    //setInputTypeAnnotations(ANNOTATION_PRESERVE);
                    break;
                case "unspecified":
                    //
                    break;
                default:
                    invalidAttribute("input-type-annotations", "strip|preserve|unspecified");
                    break;
            }
        }

    }

    /**
     * Validate this element
     *
     * @param decl Not used
     */

    @Override
    public void validate(ComponentDeclaration decl) throws XPathException {
        if (validationError != null) {
            compileError(validationError);
        }
        if (getParent() != null && getParent().getNodeKind() != Type.DOCUMENT) {
            compileError(getDisplayName() + " must be the outermost element", "XTSE0010");
        }

        for (NodeInfo curr : children()) {
            if (curr.getNodeKind() == Type.TEXT ||
                    (curr instanceof StyleElement && ((StyleElement) curr).isDeclaration()) ||
                    curr instanceof DataElement) {
                // all is well
            } else if (curr instanceof StyleElement) {
                if (!((StyleElement)curr).isInXsltNamespace() && !((StyleElement)curr).getNodeName().hasURI(NamespaceUri.NULL)) {
                    // elements in other namespaces are allowed and ignored
                } else if (curr instanceof AbsentExtensionElement && ((StyleElement) curr).forwardsCompatibleModeIsEnabled()) {
                    // this is OK: an unknown XSLT element is allowed in forwards compatibility mode
                } else if (((StyleElement) curr).isInXsltNamespace()) {
                    ((StyleElement) curr).compileError("Element " + curr.getDisplayName() +
                                                               " must not appear directly within " + getDisplayName(), "XTSE0010");
                } else {
                    ((StyleElement) curr).compileError("Element " + curr.getDisplayName() +
                                                               " must not appear directly within " + getDisplayName() +
                                                               " because it is not in a namespace", "XTSE0130");
                }
            }
        }
    }





}