import { ElementType, isTag as isTagRaw } from "domelementtype";
/**
 * This object will be used as the prototype for Nodes when creating a
 * DOM-Level-1-compliant structure.
 */
export class Node {
    constructor() {
        /** Parent of the node */
        this.parent = null;
        /** Previous sibling */
        this.prev = null;
        /** Next sibling */
        this.next = null;
        /** The start index of the node. Requires `withStartIndices` on the handler to be `true. */
        this.startIndex = null;
        /** The end index of the node. Requires `withEndIndices` on the handler to be `true. */
        this.endIndex = null;
    }
    // Read-write aliases for properties
    /**
     * Same as {@link parent}.
     * [DOM spec](https://dom.spec.whatwg.org)-compatible alias.
     */
    get parentNode() {
        return this.parent;
    }
    set parentNode(parent) {
        this.parent = parent;
    }
    /**
     * Same as {@link prev}.
     * [DOM spec](https://dom.spec.whatwg.org)-compatible alias.
     */
    get previousSibling() {
        return this.prev;
    }
    set previousSibling(prev) {
        this.prev = prev;
    }
    /**
     * Same as {@link next}.
     * [DOM spec](https://dom.spec.whatwg.org)-compatible alias.
     */
    get nextSibling() {
        return this.next;
    }
    set nextSibling(next) {
        this.next = next;
    }
    /**
     * Clone this node, and optionally its children.
     *
     * @param recursive Clone child nodes as well.
     * @returns A clone of the node.
     */
    cloneNode(recursive = false) {
        return cloneNode(this, recursive);
    }
}
/**
 * A node that contains some data.
 */
export class DataNode extends Node {
    /**
     * @param data The content of the data node
     */
    constructor(data) {
        super();
        this.data = data;
    }
    /**
     * Same as {@link data}.
     * [DOM spec](https://dom.spec.whatwg.org)-compatible alias.
     */
    get nodeValue() {
        return this.data;
    }
    set nodeValue(data) {
        this.data = data;
    }
}
/**
 * Text within the document.
 */
export class Text extends DataNode {
    constructor() {
        super(...arguments);
        this.type = ElementType.Text;
    }
    get nodeType() {
        return 3;
    }
}
/**
 * Comments within the document.
 */
export class Comment extends DataNode {
    constructor() {
        super(...arguments);
        this.type = ElementType.Comment;
    }
    get nodeType() {
        return 8;
    }
}
/**
 * Processing instructions, including doc types.
 */
export class ProcessingInstruction extends DataNode {
    constructor(name, data) {
        super(data);
        this.name = name;
        this.type = ElementType.Directive;
    }
    get nodeType() {
        return 1;
    }
}
/**
 * A `Node` that can have children.
 */
export class NodeWithChildren extends Node {
    /**
     * @param children Children of the node. Only certain node types can have children.
     */
    constructor(children) {
        super();
        this.children = children;
    }
    // Aliases
    /** First child of the node. */
    get firstChild() {
        var _a;
        return (_a = this.children[0]) !== null && _a !== void 0 ? _a : null;
    }
    /** Last child of the node. */
    get lastChild() {
        return this.children.length > 0
            ? this.children[this.children.length - 1]
            : null;
    }
    /**
     * Same as {@link children}.
     * [DOM spec](https://dom.spec.whatwg.org)-compatible alias.
     */
    get childNodes() {
        return this.children;
    }
    set childNodes(children) {
        this.children = children;
    }
}
export class CDATA extends NodeWithChildren {
    constructor() {
        super(...arguments);
        this.type = ElementType.CDATA;
    }
    get nodeType() {
        return 4;
    }
}
/**
 * The root node of the document.
 */
export class Document extends NodeWithChildren {
    constructor() {
        super(...arguments);
        this.type = ElementType.Root;
    }
    get nodeType() {
        return 9;
    }
}
/**
 * An element within the DOM.
 */
export class Element extends NodeWithChildren {
    /**
     * @param name Name of the tag, eg. `div`, `span`.
     * @param attribs Object mapping attribute names to attribute values.
     * @param children Children of the node.
     */
    constructor(name, attribs, children = [], type = name === "script"
        ? ElementType.Script
        : name === "style"
            ? ElementType.Style
            : ElementType.Tag) {
        super(children);
        this.name = name;
        this.attribs = attribs;
        this.type = type;
    }
    get nodeType() {
        return 1;
    }
    // DOM Level 1 aliases
    /**
     * Same as {@link name}.
     * [DOM spec](https://dom.spec.whatwg.org)-compatible alias.
     */
    get tagName() {
        return this.name;
    }
    set tagName(name) {
        this.name = name;
    }
    get attributes() {
        return Object.keys(this.attribs).map((name) => {
            var _a, _b;
            return ({
                name,
                value: this.attribs[name],
                namespace: (_a = this["x-attribsNamespace"]) === null || _a === void 0 ? void 0 : _a[name],
                prefix: (_b = this["x-attribsPrefix"]) === null || _b === void 0 ? void 0 : _b[name],
            });
        });
    }
}
/**
 * @param node Node to check.
 * @returns `true` if the node is a `Element`, `false` otherwise.
 */
export function isTag(node) {
    return isTagRaw(node);
}
/**
 * @param node Node to check.
 * @returns `true` if the node has the type `CDATA`, `false` otherwise.
 */
export function isCDATA(node) {
    return node.type === ElementType.CDATA;
}
/**
 * @param node Node to check.
 * @returns `true` if the node has the type `Text`, `false` otherwise.
 */
export function isText(node) {
    return node.type === ElementType.Text;
}
/**
 * @param node Node to check.
 * @returns `true` if the node has the type `Comment`, `false` otherwise.
 */
export function isComment(node) {
    return node.type === ElementType.Comment;
}
/**
 * @param node Node to check.
 * @returns `true` if the node has the type `ProcessingInstruction`, `false` otherwise.
 */
export function isDirective(node) {
    return node.type === ElementType.Directive;
}
/**
 * @param node Node to check.
 * @returns `true` if the node has the type `ProcessingInstruction`, `false` otherwise.
 */
export function isDocument(node) {
    return node.type === ElementType.Root;
}
/**
 * @param node Node to check.
 * @returns `true` if the node has children, `false` otherwise.
 */
export function hasChildren(node) {
    return Object.prototype.hasOwnProperty.call(node, "children");
}
/**
 * Clone a node, and optionally its children.
 *
 * @param recursive Clone child nodes as well.
 * @returns A clone of the node.
 */
export function cloneNode(node, recursive = false) {
    let result;
    if (isText(node)) {
        result = new Text(node.data);
    }
    else if (isComment(node)) {
        result = new Comment(node.data);
    }
    else if (isTag(node)) {
        const children = recursive ? cloneChildren(node.children) : [];
        const clone = new Element(node.name, { ...node.attribs }, children);
        children.forEach((child) => (child.parent = clone));
        if (node.namespace != null) {
            clone.namespace = node.namespace;
        }
        if (node["x-attribsNamespace"]) {
            clone["x-attribsNamespace"] = { ...node["x-attribsNamespace"] };
        }
        if (node["x-attribsPrefix"]) {
            clone["x-attribsPrefix"] = { ...node["x-attribsPrefix"] };
        }
        result = clone;
    }
    else if (isCDATA(node)) {
        const children = recursive ? cloneChildren(node.children) : [];
        const clone = new CDATA(children);
        children.forEach((child) => (child.parent = clone));
        result = clone;
    }
    else if (isDocument(node)) {
        const children = recursive ? cloneChildren(node.children) : [];
        const clone = new Document(children);
        children.forEach((child) => (child.parent = clone));
        if (node["x-mode"]) {
            clone["x-mode"] = node["x-mode"];
        }
        result = clone;
    }
    else if (isDirective(node)) {
        const instruction = new ProcessingInstruction(node.name, node.data);
        if (node["x-name"] != null) {
            instruction["x-name"] = node["x-name"];
            instruction["x-publicId"] = node["x-publicId"];
            instruction["x-systemId"] = node["x-systemId"];
        }
        result = instruction;
    }
    else {
        throw new Error(`Not implemented yet: ${node.type}`);
    }
    result.startIndex = node.startIndex;
    result.endIndex = node.endIndex;
    if (node.sourceCodeLocation != null) {
        result.sourceCodeLocation = node.sourceCodeLocation;
    }
    return result;
}
function cloneChildren(childs) {
    const children = childs.map((child) => cloneNode(child, true));
    for (let i = 1; i < children.length; i++) {
        children[i].prev = children[i - 1];
        children[i - 1].next = children[i];
    }
    return children;
}