import type { NamespaceTable } from "./NameSpaceTable";
import { coerceNodeId, NodeId } from "./NodeId";
import { UAReference } from "./UAReference";
import { assert } from "@/util/assert";
import { XMLElem, type IToXML } from "@/util/XmlElem";
import { UARolePermission } from "./UARolePermission";
import { type IAddressSpace } from "./IAddressSpace";
import { ReferenceTypeIds } from "./opcua_node_ids";
import { UALocalizedText } from "./UALocalizedText";
export class UABaseNode implements IToXML{

    public static nullBaseNode=new UABaseNode({browseName: "", addressSpace: {} as IAddressSpace, nodeId: NodeId.nullNodeId});

    public nodeId!: NodeId;
    public nodeClass="UABaseNode";
    public browseName!: string;
    public addressSpace!: IAddressSpace
    public displayName: UALocalizedText[]=[]; 
    public description: UALocalizedText[]=[];
    public symbolicName?: string;
    public releaseStatus!: string;
    public hasNoPermissions!: boolean; 
    public writeMask!: number; 
    public userWriteMask!: number;
    public category: string[]=[];
    public documentation?: string;
    public accessRestriction?: number; 
    public rolePermissions: UARolePermission[]=[]; 
    public references: UAReference[]=[];
    
    constructor(options: UABaseNodeOptions) {
        Object.assign(this, options);  
    }


    reIndex(nst: NamespaceTable, onst: NamespaceTable) {
        const nsName=onst.getUri(this.nodeId.namespace);
        assert(nsName!=undefined)
        const newIndex=nst.getIndex(nsName);
        assert(newIndex!=undefined)
        this.nodeId.namespace=newIndex;

        for(const uaref of this.references) {
            uaref.reIndex(nst, onst);
        }
    }

    getParent(): UABaseNode|null {
        const ref=this.getParentRef();
        if(ref?.fromNode===this)
            return ref.toNode;
        if(ref?.toNode===this)
            return ref.fromNode;
        return null;
    }

    setParent(newParentNode: UABaseNode, newRefType: string) {
        const hierReferences=this.addressSpace.getSubTreeAsList("ns=0;i="+ReferenceTypeIds.HierarchicalReferences);
        let href;
        for(const r of this.references) { //find current href in references
            href=hierReferences.find((n) => {n.browseName===r.referenceType})
        }
        for(let i=this.references.length;i--;i>=0) { //remove current href from references
            const r=this.references[i];
            if(r.referenceType==href?.browseName)
                this.references.splice(i,1);
        }
        const newRefA=new UAReference(this.nodeId, newRefType, newParentNode.nodeId, true);
        newRefA.fromNode=this;
        newRefA.toNode=newParentNode;
        this.references.push(newRefA);
        const newRefB=new UAReference(newParentNode.nodeId, newRefType, this.nodeId, false); 
        newRefB.fromNode=this;
        newRefB.toNode=newParentNode;
        this.references.push(newRefB);
    }

    getParentRef(): UAReference|null{
        for(const ref of this.references) {
            switch(ref.referenceType) {
                case 'HasComponent':
                case 'HasOrderedComponent':
                case 'Organizes':
                case 'HasProperty':
                case 'HasSubtype':
                case 'HasAddIn':
                    if(ref.fromNode===this&&ref.isForward===false)
                        return ref;
                    if(ref.toNode===this&&ref.isForward===true)
                        return ref;
            }
        }
        return null;
    }

    getChildren(): UABaseNode[] {
        const children: UABaseNode[]=[];
        for(const ref of this.references) {
            switch(ref.referenceType) {
                case 'HasComponent':
                case 'HasOrderedComponent':
                case 'Organizes':
                case 'HasProperty':
                case 'HasSubtype':
                case 'HasAddIn':
                    if(ref.isForward&&ref.fromNode===this) {
                        if(!children.includes(ref.toNode))
                            children.push(ref.toNode);
                    } 
                    if(!ref.isForward&&ref.toNode===this) {
                        if(!children.includes(ref.fromNode))
                            children.push(ref.fromNode);
                    }
                    break;
                }
        }
        return children;
    }

    getModellingRule(): string|undefined{
        for(const ref of this.references) {
            if(ref.referenceType == "HasModellingRule"){
                return ref.toNode.browseName;
            }
        }
        return undefined;
    }

    resolveReferences(nm: Map<string, UABaseNode>) {
        for(const ref of this.references) {
            const fromNode=nm.get(ref.fromRef.toString()) 
            if(fromNode)
                ref.fromNode=fromNode;
            const toNode=nm.get(ref.toRef.toString()) 
            if(!toNode) 
                continue; //TODO: if we cant find the node; the parser is still incomplete or the nodeset is broken
            
            ref.toNode=toNode;
            if(ref.fromNode.nodeId.toString()===this.nodeId.toString()){ //add this reference to referenced node
                //Bug? when loading from filedrop; fromNode is a proxy; this is not.
                if(!ref.toNode.references.includes(ref))
                    ref.toNode.references.push(ref);
            } 
        }
    }

    static fromXML(xmlObject: any, addressSpace: IAddressSpace): UABaseNode{
        const references:UAReference[]=[];
        const nodeId=coerceNodeId(xmlObject['@_NodeId']);
        for(const xmlref of xmlObject['References']?.['Reference']||[]) {
            references.push(UAReference.fromXML(xmlref, nodeId));
        }
        const displayNames:UALocalizedText[]=[];
        for(const xmldn of xmlObject['DisplayName']||[]) {
            displayNames.push(UALocalizedText.fromXML("DisplayName", xmldn));
        }
        const descriptions:UALocalizedText[]=[];
        for(const desc of xmlObject['Description']||[]) {
            descriptions.push(UALocalizedText.fromXML("Description", desc));
        }        
        const permissions:UARolePermission[]=[];
        for(const perm of xmlObject['RolePermissions']?.['RolePermission']||[]) {
            permissions.push(UARolePermission.fromXML(perm));
        }
        const ua=new UABaseNode({addressSpace: addressSpace,
                                nodeId: nodeId,
                                browseName: xmlObject['@_BrowseName'], 
                                writeMask: Number(xmlObject['@_WriteMask']||0),
                                userWriteMask: Number(xmlObject['@_UserWriteMask']||0),
                                accessRestriction: xmlObject['@_AccessRestrictions'],
                                hasNoPermissions: xmlObject['@_HasNoPermissions']||false,
                                symbolicName: xmlObject['@_SymbolicName'],
                                releaseStatus: xmlObject['@_ReleaseStatus']||"Released",
                                displayName:  displayNames, 
                                description: descriptions,
                                category: xmlObject['Category'],
                                documentation: xmlObject['Documentation']?.['#text'],
                                references: references,
                                rolePermissions: permissions,
                            });
        return ua;
    }


    toXML(lnst: NamespaceTable, gnst: NamespaceTable): XMLElem {
        const nid=UABaseNode.localNodeId(this.nodeId, lnst, gnst);
        const elem =new XMLElem('UABaseNode');
        elem.attr('NodeId', nid.toString())
            .attr('BrowseName', this.browseName)
            .attr('WriteMask', this.writeMask.toString())
            .attr('UserWriteMask', this.userWriteMask.toString())
            .attr('AccessRestriction', this.accessRestriction?.toString())
            .attr('HasNoPermissions', this.hasNoPermissions)
            .attr('SymbolicName', this.symbolicName)
            .attr('ReleaseStatus',this.releaseStatus)
            .attr('Documentation', this.documentation);
        
        for(const c in this.category) {
            elem.attr('Category', c);
        }
        const refs=new XMLElem('References');
        for(const ref of this.references) {
            if(ref.fromNode.nodeId.toString()==this.nodeId.toString()) //on load resolveReferences() duplicates references to both sides. skip them for export
                refs.add(ref.toXML(lnst, gnst));
        }
        if(refs.elements.length>0)
            elem.add(refs);
        for(const dn of this.displayName)
            elem.add(dn.toXML());
        for(const desc of this.description)
            elem.add(desc.toXML());
        const perms=new XMLElem('RolePermissions')
        for(const perm of this.rolePermissions)
                perms.add(perm.toXML());
        if(perms.elements.length>0)
            elem.add(perms);
        return elem;
    }

    static localNodeId(nodeId: NodeId, lnst: NamespaceTable, gnst: NamespaceTable) {
        const ns_uri=gnst.getUri(nodeId.namespace);
        assert(ns_uri);
        const nsIdx=lnst.getIndex(ns_uri);
        assert(nsIdx);
        const tmpNode= coerceNodeId(nodeId.toString());
        tmpNode.namespace=nsIdx;
        return tmpNode;
    } 
}


export interface UABaseNodeOptions {
    addressSpace: IAddressSpace;
    nodeId: NodeId;
    browseName: string;
    writeMask?: number; 
    userWriteMask?: number;
    accessRestriction?: number; 
    hasNoPermissions?: boolean; 
    symbolicName?: string;
    releaseStatus?: string;
    displayName?: UALocalizedText[];
    description?: UALocalizedText[];
    category?: string[];
    documentation?: string;
    references?: UAReference[];
    rolePermissions?: UARolePermission[]; 
}