eCourt-note/lib/lib-tmpl.ts

import { generateHmacSha256, signEd25519, sortObjectKeys, verifyEd25519, verifyHmacSha256 } from '@/lib/lib-utils';
import createReport from 'docx-templates';
import PizzaZip from "pizzip";
import {
  DOMParser,
  XMLSerializer,
  type Document as XmlDocument,
  type Element as XmlElement,
  type Node as XmlNode,
  type Attr as XmlAttr,
} from "@xmldom/xmldom";
import xpath from "xpath";
const WORD_NS =
  "http://schemas.openxmlformats.org/wordprocessingml/2006/main";

export interface ExtractedData {
  [tagName: string]: string;
}

const asXpathNode = (node: XmlNode): globalThis.Node =>
  node as unknown as globalThis.Node;

function createSelector() {
  return xpath.useNamespaces({ w: WORD_NS });
}


/**
 * ฟังก์ชันสำหรับดึงข้อมูลจาก docx ออกมาเป็น JSON โดยอิงจาก Bookmark (w:bookmarkStart)
 */
export function extractBookmark(docxBuffer: Buffer,): ExtractedData {
    const zip = new PizzaZip(docxBuffer);
    const docXmlFile = zip.file("word/document.xml");

    if (!docXmlFile) {
      throw new Error("Invalid docx file: word/document.xml not found.");
    }
    const docXmlText: string = docXmlFile.asText();
    
    // 3. Parse ข้อความ XML ให้เป็น DOM Object
    const parser = new DOMParser();
    const doc = parser.parseFromString(docXmlText, "text/xml");
    
    // 4. ตั้งค่า Namespace ของ Word XML เพื่อใช้ค้นหาด้วย XPath
    const select = xpath.useNamespaces({
        'w': 'http://schemas.openxmlformats.org/wordprocessingml/2006/main'
    });

    const result: ExtractedData = {};
    
    // ค้นหา Bookmark หรือ Tag ที่ใช้แบ่ง Section 
    // const bookmarks = select('//w:bookmarkStart', doc  as unknown as globalThis.Node) as Element[];
    const bookmarks = select(
        "//w:bookmarkStart",
        doc as unknown as globalThis.Node
    ) as unknown as XmlElement[];

    bookmarks.forEach((bookmark: XmlElement) => {
        const sectionName = bookmark.getAttribute('w:name');
        const bookmarkId = bookmark.getAttribute('w:id');
        
        // กรองเอาเฉพาะ Bookmark ที่เราสนใจ (ไม่เอาพวกระบบสร้างเองอย่าง _GoBack)
        if (sectionName && !sectionName.startsWith('_')) {
            let extractedText = "";
            let currentNode: XmlNode | null = bookmark.nextSibling;

            // วนลูปอ่าน Node ถัดไปเรื่อยๆ จนกว่าจะเจอจุดสิ้นสุดของ Bookmark
            while (currentNode) {
                // ถ้าเจอจุดจบของ Bookmark ตัวเอง ให้หยุด
                if (
                    currentNode.nodeType === 1 && // Element node
                    (currentNode as XmlElement).nodeName === 'w:bookmarkEnd' && 
                    (currentNode as XmlElement).getAttribute('w:id') === bookmarkId
                ) {
                    break;
                }

                // ดึง Text (w:t) ที่อยู่ภายใน Node ปัจจุบัน
                const textNodes = select('.//w:t/text()', currentNode  as unknown as globalThis.Node) as unknown as XmlNode[];
                textNodes.forEach((textNode: XmlNode) => {
                    if (textNode.nodeValue) {
                        extractedText += textNode.nodeValue;
                    }
                });

                currentNode = currentNode.nextSibling;
            }

            // บันทึกลงผลลัพธ์ JSON
            result[sectionName] = extractedText.trim();
        }
    });

    return result;
}



/**
 * อ่าน Content Control (w:sdt) จาก DOCX Buffer
 * ปัจจุบันอ่านจาก word/document.xml ตาม logic ของโค้ดต้นฉบับ
 */
export function extractContentControls(
  docxBuffer: Buffer,
): ExtractedData {
  const zip = new PizzaZip(docxBuffer);
  const docXmlFile = zip.file("word/document.xml");

  if (!docXmlFile) {
    throw new Error("Invalid docx file: word/document.xml not found.");
  }

  const parser = new DOMParser();
  const doc = parser.parseFromString(docXmlFile.asText(), "text/xml");
  const select = createSelector();
  const result: ExtractedData = {};

  const sdtNodes = select(
    "//w:sdt",
    asXpathNode(doc),
  ) as unknown as XmlElement[];

  sdtNodes.forEach((sdt) => {
    const tagAttr = select(
      "./w:sdtPr/w:tag/@w:val",
      asXpathNode(sdt),
      true,
    ) as unknown as XmlAttr | undefined;

    const tagName = tagAttr?.value;

    if (!tagName) return;

    const sdtContent = select(
      "./w:sdtContent",
      asXpathNode(sdt),
      true,
    ) as unknown as XmlElement | undefined;

    if (!sdtContent) {
      result[tagName] = "";
      return;
    }

    const nodes = select(
      ".//w:p | .//w:t | .//w:tab | .//w:br | .//w:noBreakHyphen | .//w:softHyphen | .//w:sym",
      asXpathNode(sdtContent),
    ) as unknown as XmlElement[];

    let extractedText = "";

    nodes.forEach((node) => {
      switch (node.nodeName) {
        case "w:p":
          if (
            extractedText.length > 0 &&
            !extractedText.endsWith("\n")
          ) {
            extractedText += "\n\n";
          }
          break;

        case "w:t":
          extractedText += node.textContent || "";
          break;

        case "w:tab":
          extractedText += "\t";
          break;

        case "w:br":
          extractedText += "\n";
          break;

        case "w:noBreakHyphen":
          extractedText += "\u2011";
          break;

        case "w:softHyphen":
          extractedText += "\u00ad";
          break;

        case "w:sym": {
          const charAttr = node.getAttribute("w:char");
          if (charAttr) {
            const charCode = Number.parseInt(charAttr, 16);
            extractedText += String.fromCharCode(charCode);
          }
          break;
        }
      }
    });

    result[tagName] = extractedText;
  });

  return result;
}

type SdtControlType = "plain" | "rich" | "other";
type SdtStructure = "block" | "inline";

function detectSdtControlType(
  sdt: XmlElement,
  select: xpath.XPathSelect,
): { type: SdtControlType; multiLine: boolean } {
  const sdtPr = select(
    "./w:sdtPr",
    asXpathNode(sdt),
    true,
  ) as unknown as XmlElement | undefined;

  if (!sdtPr) {
    return { type: "other", multiLine: false };
  }

  const textEl = select(
    "./w:text",
    asXpathNode(sdtPr),
    true,
  ) as unknown as XmlElement | undefined;

  if (textEl) {
    const multiLineAttr = select(
      "./@w:multiLine",
      asXpathNode(textEl),
      true,
    ) as unknown as XmlAttr | undefined;

    return {
      type: "plain",
      multiLine:
        multiLineAttr?.value === "1" ||
        multiLineAttr?.value === "true",
    };
  }

  const richTextEl = select(
    "./w:richText",
    asXpathNode(sdtPr),
    true,
  ) as unknown as XmlElement | undefined;

  if (richTextEl) {
    return { type: "rich", multiLine: true };
  }

  const otherTypeTags = [
    "w:date",
    "w:dropDownList",
    "w:comboBox",
    "w:checkbox",
    "w:citation",
    "w:group",
    "w:docPartObj",
    "w:docPartList",
  ];

  for (const tag of otherTypeTags) {
    const found = select(
      `./${tag}`,
      asXpathNode(sdtPr),
      true,
    ) as unknown as XmlElement | undefined;

    if (found) {
      return { type: "other", multiLine: false };
    }
  }

  return { type: "rich", multiLine: true };
}

function detectSdtStructure(
  sdtContent: XmlElement,
  select: xpath.XPathSelect,
): SdtStructure {
  const directP = select(
    "./w:p",
    asXpathNode(sdtContent),
  ) as unknown as XmlElement[];

  return directP.length > 0 ? "block" : "inline";
}

function buildRunChildren(
  doc: XmlDocument,
  text: string,
): XmlElement[] {
  const nodes: XmlElement[] = [];
  const tokens = text.split(/(\t|\n)/);

  tokens.forEach((token) => {
    if (token === "") return;

    if (token === "\t") {
      nodes.push(doc.createElementNS(WORD_NS, "w:tab"));
    } else if (token === "\n") {
      nodes.push(doc.createElementNS(WORD_NS, "w:br"));
    } else {
      const t = doc.createElementNS(WORD_NS, "w:t");
      t.setAttribute("xml:space", "preserve");
      t.textContent = token;
      nodes.push(t);
    }
  });

  if (nodes.length === 0) {
    const t = doc.createElementNS(WORD_NS, "w:t");
    t.setAttribute("xml:space", "preserve");
    t.textContent = "";
    nodes.push(t);
  }

  return nodes;
}

function buildRun(
  doc: XmlDocument,
  text: string,
  rPr?: XmlElement,
): XmlElement {
  const run = doc.createElementNS(WORD_NS, "w:r");

  if (rPr) {
    run.appendChild(rPr.cloneNode(true));
  }

  buildRunChildren(doc, text).forEach((node) =>
    run.appendChild(node),
  );

  return run;
}

function insertInlineContent(
  doc: XmlDocument,
  sdtContent: XmlElement,
  select: xpath.XPathSelect,
  text: string,
  allowLineBreak: boolean,
): void {
  const safeText = allowLineBreak
    ? text
    : text.replace(/\n/g, " ");

  const existingRuns = select(
    "./w:r",
    asXpathNode(sdtContent),
  ) as unknown as XmlElement[];

  const firstRPr =
    existingRuns.length > 0
      ? (select(
        "./w:rPr",
        asXpathNode(existingRuns[0]),
        true,
      ) as unknown as XmlElement | undefined)
      : undefined;

  existingRuns.forEach((r) => {
    if (r.parentNode) r.parentNode.removeChild(r);
  });

  sdtContent.appendChild(
    buildRun(doc, safeText, firstRPr),
  );
}

// ในฟังก์ชัน insertBlockContent()
function insertBlockContent(
  doc: XmlDocument,
  sdtContent: XmlElement,
  select: xpath.XPathSelect,
  text: string,
  allowMultiParagraph: boolean,
): void {
  const allParagraphs = select(
    "./w:p",
    asXpathNode(sdtContent),
  ) as unknown as XmlElement[];

  if (allParagraphs.length === 0) {
    const p = doc.createElementNS(WORD_NS, "w:p");
    sdtContent.appendChild(p);
    allParagraphs.push(p);
  }

  const firstP = allParagraphs[0];

  const firstPPr = select(
    "./w:pPr",
    asXpathNode(firstP),
    true,
  ) as unknown as XmlElement | undefined;

  const firstRun = select(
    "./w:r",
    asXpathNode(firstP),
    true,
  ) as unknown as XmlElement | undefined;

  const firstRPr = firstRun
    ? (select(
        "./w:rPr",
        asXpathNode(firstRun),
        true,
      ) as unknown as XmlElement | undefined)
    : undefined;

  // ลบย่อหน้าเดิมทั้งหมดยกเว้นย่อหน้าแรก
  allParagraphs.forEach((p) => {
    if (p !== firstP && p.parentNode) {
      p.parentNode.removeChild(p);
    }
  });

  // ลบ Run เดิมออกจากย่อหน้าแรก
  const existingRuns = select(
    "./w:r",
    asXpathNode(firstP),
  ) as unknown as XmlElement[];

  existingRuns.forEach((r) => {
    if (r.parentNode) r.parentNode.removeChild(r);
  });

  if (!allowMultiParagraph) {
    // ถ้าไม่ใช่ออกแบบให้ข้ามย่อหน้าได้ ให้เปลี่ยน \n ทั้งหมดเป็น Space หรือ buildRun ปกติ
    firstP.appendChild(buildRun(doc, text.replace(/\n+/g, "\n"), firstRPr));
    return;
  }

  // แยกด้วย \n\n สำหรับ Paragraph Break (w:p)
  const paragraphs = text.split("\n\n");

  paragraphs.forEach((pText, index) => {
    let targetP: XmlElement;

    if (index === 0) {
      targetP = firstP;
    } else {
      targetP = doc.createElementNS(WORD_NS, "w:p");
      if (firstPPr) {
        targetP.appendChild(firstPPr.cloneNode(true));
      }
      sdtContent.appendChild(targetP);
    }

    const run = doc.createElementNS(WORD_NS, "w:r");
    if (firstRPr) {
      run.appendChild(firstRPr.cloneNode(true));
    }

    // pText จะมี \n เดี่ยวๆ หลงเหลืออยู่ ซึ่ง buildRunChildren จะแปลงเป็น w:br ให้โดยอัตโนมัติ
    buildRunChildren(doc, pText).forEach((node) =>
      run.appendChild(node),
    );

    targetP.appendChild(run);
  });
}

function insertFallbackContent(
  sdtContent: XmlElement,
  select: xpath.XPathSelect,
  text: string,
): void {
  const textNodes = select(
    ".//w:t",
    asXpathNode(sdtContent),
  ) as unknown as XmlElement[];

  if (textNodes.length === 0) return;

  textNodes[0].textContent = text;

  for (let i = 1; i < textNodes.length; i++) {
    textNodes[i].textContent = "";
  }
}

export type PropData = Record<string, unknown>;
export type DocumentTemplate = {info?:PropData,dc?:PropData,cc:PropData,};

function normalizeValue(value: unknown): string {
  if (value === null || value === undefined) {
    return "";
  }

  if (typeof value === "string") {
    return value;
  }

  if (
    typeof value === "number" ||
    typeof value === "boolean" ||
    typeof value === "bigint"
  ) {
    return String(value);
  }

  // รองรับ JSON ที่ส่ง array/object มา แต่ Content Control ต้องการ text
  return JSON.stringify(value);
}

/**
 * นำ JSON data ไปแทนค่า Content Control ใน DOCX template
 * คืนค่าเป็น Buffer ของ DOCX ที่สร้างเสร็จแล้ว
 */
export function templateContentControls(
  templateBuffer: Buffer|Uint8Array<ArrayBufferLike>,
  data: PropData,
): Buffer {
  const zip = new PizzaZip(templateBuffer);
  const docXmlFile = zip.file("word/document.xml");

  if (!docXmlFile) {
    throw new Error("Invalid docx file: word/document.xml not found.");
  }

  const parser = new DOMParser();
  const doc = parser.parseFromString(docXmlFile.asText(), "text/xml");
  const select = createSelector();

  const sdtNodes = select(
    "//w:sdt",
    asXpathNode(doc),
  ) as unknown as XmlElement[];

  sdtNodes.forEach((sdt) => {
    const tagAttr = select(
      "./w:sdtPr/w:tag/@w:val",
      asXpathNode(sdt),
      true,
    ) as unknown as XmlAttr | undefined;

    const tagName = tagAttr?.value;

    if (!tagName || !Object.prototype.hasOwnProperty.call(data, tagName)) {
      return;
    }

    const newValue = normalizeValue(data[tagName]);

    const sdtContent = select(
      "./w:sdtContent",
      asXpathNode(sdt),
      true,
    ) as unknown as XmlElement | undefined;

    if (!sdtContent) return;

    const { type: controlType, multiLine } =
      detectSdtControlType(sdt, select);

    const structure = detectSdtStructure(sdtContent, select);

    if (controlType === "other") {
      insertFallbackContent(sdtContent, select, newValue);
      return;
    }

    if (structure === "inline") {
      const allowLineBreak =
        controlType === "plain" ? multiLine : true;

      insertInlineContent(
        doc,
        sdtContent,
        select,
        newValue,
        allowLineBreak,
      );
    } else {
      insertBlockContent(
        doc,
        sdtContent,
        select,
        newValue,
        controlType === "rich",
      );
    }
  });

  const serializer = new XMLSerializer();
  zip.file(
    "word/document.xml",
    serializer.serializeToString(doc),
  );

  return zip.generate({
    type: "nodebuffer",
    compression: "DEFLATE",
  });
}


const CUSTOM_NS =
  "http://schemas.openxmlformats.org/officeDocument/2006/custom-properties";

const VT_NS =
  "http://schemas.openxmlformats.org/officeDocument/2006/docPropsVTypes";

const REL_NS =
  "http://schemas.openxmlformats.org/package/2006/relationships";

const CONTENT_TYPES_NS =
  "http://schemas.openxmlformats.org/package/2006/content-types";

const XMLNS_NS = "http://www.w3.org/2000/xmlns/";

const CUSTOM_REL_TYPE =
  "http://schemas.openxmlformats.org/officeDocument/2006/relationships/custom-properties";

const CUSTOM_CONTENT_TYPE =
  "application/vnd.openxmlformats-officedocument.custom-properties+xml";

const CUSTOM_FMTID =
  "{D5CDD505-2E9C-101B-9397-08002B2CF9AE}";

const CUSTOM_PATH = "docProps/custom.xml";

type CustomPropertyValue =
  | string
  | number
  | boolean
  | Date
  | null
  | undefined;

function parseXml(xml: string, fileName: string): XmlDocument {
  const errors: string[] = [];

  const parser = new DOMParser();

  const doc = parser.parseFromString(
    xml,
    "application/xml",
  ) as XmlDocument;

  if (errors.length > 0 || !doc.documentElement) {
    throw new Error(
      `Invalid ${fileName}: ${errors.join("; ")}`,
    );
  }

  return doc;
}

function assertRoot(
  doc: XmlDocument,
  namespace: string,
  localName: string,
  fileName: string,
): XmlElement {
  const root = doc.documentElement;

  if (root===null ||
    root.localName !== localName ||
    root.namespaceURI !== namespace
  ) {
    throw new Error(`Invalid root element in ${fileName}`);
  }

  return root;
}

function createCustomXml(): XmlDocument {
  const xml = [
    '<?xml version="1.0" encoding="UTF-8" standalone="yes"?>',
    `<Properties xmlns="${CUSTOM_NS}" xmlns:vt="${VT_NS}"/>`,
  ].join("");

  return parseXml(xml, CUSTOM_PATH);
}

function createValueElement(
  doc: XmlDocument,
  value: unknown,
): XmlElement {
  let tagName: string;
  let text: string;

  if (value == null) {
    // null และ undefined เก็บเป็น String ว่าง
    tagName = "vt:lpwstr";
    text = "";
  } else if (typeof value === "string") {
    tagName = "vt:lpwstr";
    text = value;
  } else if (typeof value === "boolean") {
    tagName = "vt:bool";
    text = value ? "true" : "false";
  } else if (typeof value === "number") {
    if (!Number.isFinite(value)) {
      throw new TypeError(
        `Invalid numeric property value: ${value}`,
      );
    }

    if (Number.isInteger(value)) {
      if (!Number.isSafeInteger(value)) {
        throw new TypeError(
          `Integer property exceeds safe integer range: ${value}`,
        );
      }

      tagName = "vt:i8";
    } else {
      tagName = "vt:r8";
    }

    text = String(value);
  } else if (value instanceof Date) {
    if (Number.isNaN(value.getTime())) {
      throw new TypeError("Invalid Date property value");
    }

    tagName = "vt:filetime";
    text = value.toISOString();
  } else {
    throw new TypeError(
      `Unsupported custom property type: ${
        Object.prototype.toString.call(value)
      }`,
    );
  }

  const element = doc.createElementNS(VT_NS, tagName);

  element.appendChild(doc.createTextNode(text));

  return element;
}

function ensureCustomRelationship(zip: PizzaZip): void {
  const fileName = "_rels/.rels";
  const file = zip.file(fileName);

  if (!file) {
    throw new Error(`DOCX is missing ${fileName}`);
  }

  const doc = parseXml(file.asText(), fileName);

  const root = assertRoot(
    doc,
    REL_NS,
    "Relationships",
    fileName,
  );

  const relationships = Array.from(
    root.getElementsByTagNameNS(REL_NS, "Relationship"),
  ) as XmlElement[];

  const existing = relationships.find(
    (item) => item.getAttribute("Type") === CUSTOM_REL_TYPE,
  );

  if (existing) {
    if (existing.getAttribute("Target") !== CUSTOM_PATH) {
      throw new Error(
        "Existing custom-properties relationship has an unexpected Target",
      );
    }

    return;
  }

  const ids = new Set(
    relationships.map((item) => item.getAttribute("Id")),
  );

  let index = 1;
  let relationshipId = `rId${index}`;

  while (ids.has(relationshipId)) {
    index++;
    relationshipId = `rId${index}`;
  }

  const relationship = doc.createElementNS(
    REL_NS,
    "Relationship",
  );

  relationship.setAttribute("Id", relationshipId);
  relationship.setAttribute("Type", CUSTOM_REL_TYPE);
  relationship.setAttribute("Target", CUSTOM_PATH);

  root.appendChild(relationship);

  zip.file(
    fileName,
    new XMLSerializer().serializeToString(doc),
  );
}

function ensureCustomContentType(zip: PizzaZip): void {
  const fileName = "[Content_Types].xml";
  const file = zip.file(fileName);

  if (!file) {
    throw new Error(`DOCX is missing ${fileName}`);
  }

  const doc = parseXml(file.asText(), fileName);

  const root = assertRoot(
    doc,
    CONTENT_TYPES_NS,
    "Types",
    fileName,
  );

  const overrides = Array.from(
    root.getElementsByTagNameNS(
      CONTENT_TYPES_NS,
      "Override",
    ),
  ) as XmlElement[];

  const existing = overrides.find(
    (item) => item.getAttribute("PartName") === "/docProps/custom.xml",
  );

  if (existing) {
    existing.setAttribute("ContentType", CUSTOM_CONTENT_TYPE);
  } else {
    const override = doc.createElementNS(
      CONTENT_TYPES_NS,
      "Override",
    );

    override.setAttribute(
      "PartName",
      "/docProps/custom.xml",
    );

    override.setAttribute(
      "ContentType",
      CUSTOM_CONTENT_TYPE,
    );

    root.appendChild(override);
  }

  zip.file(
    fileName,
    new XMLSerializer().serializeToString(doc),
  );
}
/** how to use
const templateBuffer = readFileSync("template.docx");
const outputBuffer = setDocPropsCustom(templateBuffer, {
  DocumentCode: "DOC-2026-001",
  Department: "ฝ่ายเทคโนโลยีสารสนเทศ",
  Revision: 2,
  IsApproved: true,
  PublishedAt: new Date(),
});
writeFileSync("output.docx", outputBuffer);
 */
export function setCustomDocProps(
  docxBuffer: Buffer | Uint8Array<ArrayBufferLike>,
  data: Record<string, unknown>,
): Buffer {
  const zip = new PizzaZip(docxBuffer);

  // อ่าน Custom Properties เดิม หรือสร้างใหม่หากไม่มี
  const customFile = zip.file(CUSTOM_PATH);

  const doc = customFile
    ? parseXml(customFile.asText(), CUSTOM_PATH)
    : createCustomXml();

  const root = assertRoot(
    doc,
    CUSTOM_NS,
    "Properties",
    CUSTOM_PATH,
  );

  // รับรองว่ามี Namespace vt สำหรับ Value Elements
  root.setAttributeNS(XMLNS_NS, "xmlns:vt", VT_NS);

  const properties = Array.from(
    root.getElementsByTagNameNS(CUSTOM_NS, "property"),
  ) as XmlElement[];

  const propertyMap = new Map<string, XmlElement>();
  const usedPids = new Set<number>();

  for (const property of properties) {
    const name = property.getAttribute("name");
    const pidText = property.getAttribute("pid");
    const pid = Number(pidText);

    if (!name) {
      throw new Error(
        "Custom property is missing its name attribute",
      );
    }

    if (propertyMap.has(name)) {
      throw new Error(`Duplicate custom property name: ${name}`);
    }

    if (pidText === null ||
      !/^[1-9]\d*$/.test(pidText) ||
      !Number.isSafeInteger(pid) ||
      pid < 2
    ) {
      throw new Error(
        `Invalid custom property pid for "${name}": ${pidText}`,
      );
    }

    if (usedPids.has(pid)) {
      throw new Error(`Duplicate custom property pid: ${pid}`);
    }

    propertyMap.set(name, property);
    usedPids.add(pid);
  }

  let nextPid = 2;

  for (const [name, value] of Object.entries(data)) {
    if (!name.trim()) {
      throw new Error("Custom property name must not be empty");
    }

    let property = propertyMap.get(name);

    if (!property) {
      while (usedPids.has(nextPid)) {
        nextPid++;
      }

      property = doc.createElementNS(
        CUSTOM_NS,
        "property",
      );

      property.setAttribute("fmtid", CUSTOM_FMTID);
      property.setAttribute("pid", String(nextPid));
      property.setAttribute("name", name);

      usedPids.add(nextPid);
      nextPid++;

      root.appendChild(property);
      propertyMap.set(name, property);
    }

    // สร้างค่าใหม่ก่อนแก้ไข Property เดิม
    const valueElement = createValueElement(doc, value);

    while (property.firstChild) {
      property.removeChild(property.firstChild);
    }

    property.appendChild(valueElement);
  }

  // อัปเดตไฟล์ Custom Properties
  zip.file(
    CUSTOM_PATH,
    new XMLSerializer().serializeToString(doc),
  );

  // ตรวจสอบส่วนประกอบที่เชื่อมโยงกับ Custom Properties
  ensureCustomRelationship(zip);
  ensureCustomContentType(zip);

  return Buffer.from(
    zip.generate({
      type: "nodebuffer",
      compression: "DEFLATE",
    }),
  );
}

/**
 * ดึงค่า Custom Document Properties จาก DOCX Buffer
 */
export function getCustomDocProps(
  docxBuffer: Buffer | Uint8Array<ArrayBufferLike>,
): Record<string, CustomPropertyValue> {
  const zip = new PizzaZip(docxBuffer);
  const customFile = zip.file(CUSTOM_PATH);

  if (!customFile) {
    return {};
  }

  const doc = parseXml(customFile.asText(), CUSTOM_PATH);
  const root = assertRoot(
    doc,
    CUSTOM_NS,
    "Properties",
    CUSTOM_PATH,
  );

  const properties = Array.from(
    root.getElementsByTagNameNS(CUSTOM_NS, "property"),
  ) as XmlElement[];

  const result: Record<string, CustomPropertyValue> = {};

  for (const property of properties) {
    const name = property.getAttribute("name");
    if (!name) continue;

    // หา child element แรกที่อยู่ใน VT_NS namespace
    let valueNode: XmlElement | undefined;
    for (let i = 0; i < property.childNodes.length; i++) {
      const node = property.childNodes[i] as XmlElement;
      if (node.nodeType === 1 && node.namespaceURI === VT_NS) {
        valueNode = node;
        break;
      }
    }

    if (!valueNode) {
      result[name] = "";
      continue;
    }

    const textContent = valueNode.textContent || "";

    // แปลงค่ากลับตาม VT Data Type
    switch (valueNode.localName) {
      case "bool":
        result[name] = textContent === "true" || textContent === "1";
        break;

      case "i1":
      case "i2":
      case "i4":
      case "i8":
      case "int":
      case "ui1":
      case "ui2":
      case "ui4":
      case "ui8":
      case "uint":
      case "r4":
      case "r8":
      case "decimal": {
        const num = Number(textContent);
        result[name] = Number.isNaN(num) ? textContent : num;
        break;
      }

      case "filetime":
      case "date": {
        const date = new Date(textContent);
        result[name] = Number.isNaN(date.getTime()) ? textContent : date;
        break;
      }

      default:
        // vt:lpwstr, vt:lpstr, vt:bstr และอื่นๆ
        result[name] = textContent;
        break;
    }
  }

  return result;
}

const CORE_NS =
  "http://schemas.openxmlformats.org/package/2006/metadata/core-properties";
const DC_NS = "http://purl.org/dc/elements/1.1/";
const DCTERMS_NS = "http://purl.org/dc/terms/";
const APP_NS =
  "http://schemas.openxmlformats.org/officeDocument/2006/extended-properties";

export interface DocPropsOptions {
  standard?: boolean;
  extended?: boolean;
  custom?: boolean;
}

export interface StandardDocProps {
  title?: string;
  subject?: string;
  creator?: string;
  keywords?: string;
  description?: string;
  lastModifiedBy?: string;
  revision?: string;
  created?: Date;
  modified?: Date;
  category?: string;
  contentStatus?: string;
}

export interface ExtendedDocProps {
  template?: string;
  totalTime?: number;
  pages?: number;
  words?: number;
  characters?: number;
  charactersWithSpaces?: number;
  lines?: number;
  paragraphs?: number;
  application?: string;
  appVersion?: string;
  company?: string;
  manager?: string;
  docSecurity?: number;
}

export interface DocPropsResult {
  standard?: StandardDocProps;
  extended?: ExtendedDocProps;
  custom?: Record<string, CustomPropertyValue>;
}

/**
 * ดึงข้อมูล Properties ของเอกสาร DOCX ตามประเภทที่เลือก
 * example:
 *   const allProps = getDocProps(docxBuffer); 
 *   const selectedProps = getDocProps(docxBuffer, {
 *     standard: true,
 *     custom: true,
 *     extended: false,
 *   });
 *   console.log(allProps);
 *   console.log(selectedProps.standard?.title);
 */

export function getDocProps(
  docxBuffer: Buffer | Uint8Array<ArrayBufferLike>,
  options: DocPropsOptions = { standard: true, extended: true, custom: true },
): DocPropsResult {
  const zip = new PizzaZip(docxBuffer);
  const result: DocPropsResult = {};

  // 1. Standard / Core Properties (docProps/core.xml)
  if (options.standard) {
    const coreFile = zip.file("docProps/core.xml");
    if (coreFile) {
      const doc = parseXml(coreFile.asText(), "docProps/core.xml");
      const getText = (ns: string, localName: string) => {
        const els = doc.getElementsByTagNameNS(ns, localName);
        return els.length > 0 ? els[0].textContent || "" : undefined;
      };

      const parseDate = (dateStr?: string) => {
        if (!dateStr) return undefined;
        const d = new Date(dateStr);
        return Number.isNaN(d.getTime()) ? undefined : d;
      };

      result.standard = {
        title: getText(DC_NS, "title"),
        subject: getText(DC_NS, "subject"),
        creator: getText(DC_NS, "creator"),
        keywords: getText(CORE_NS, "keywords"),
        description: getText(DC_NS, "description"),
        lastModifiedBy: getText(CORE_NS, "lastModifiedBy"),
        revision: getText(CORE_NS, "revision"),
        created: parseDate(getText(DCTERMS_NS, "created")),
        modified: parseDate(getText(DCTERMS_NS, "modified")),
        category: getText(CORE_NS, "category"),
        contentStatus: getText(CORE_NS, "contentStatus"),
      };
    }
  }

  // 2. Extended / Automatically Updated Properties (docProps/app.xml)
  if (options.extended) {
    const appFile = zip.file("docProps/app.xml");
    if (appFile) {
      const doc = parseXml(appFile.asText(), "docProps/app.xml");
      const getText = (localName: string) => {
        const els = doc.getElementsByTagNameNS(APP_NS, localName);
        return els.length > 0 ? els[0].textContent || "" : undefined;
      };

      const parseNum = (val?: string) => {
        if (!val) return undefined;
        const n = Number(val);
        return Number.isNaN(n) ? undefined : n;
      };

      result.extended = {
        template: getText("Template"),
        totalTime: parseNum(getText("TotalTime")),
        pages: parseNum(getText("Pages")),
        words: parseNum(getText("Words")),
        characters: parseNum(getText("Characters")),
        charactersWithSpaces: parseNum(getText("CharactersWithSpaces")),
        lines: parseNum(getText("Lines")),
        paragraphs: parseNum(getText("Paragraphs")),
        application: getText("Application"),
        appVersion: getText("AppVersion"),
        company: getText("Company"),
        manager: getText("Manager"),
        docSecurity: parseNum(getText("DocSecurity")),
      };
    }
  }

  // 3. Custom Properties (docProps/custom.xml)
  if (options.custom) {
    result.custom = getCustomDocProps(docxBuffer);
  }

  return result;
}


//**************************** document snapshot *******************************************

/** DocPropsResult หลังทำ JSON-safe (Date → ISO string) — ชนิดของ `properties` ใน
 *  DocumentExtractSnapshot ทั้งฝั่ง response ของ /api/template/extract และ column
 *  `fields` jsonb ของ document_versions (ค่าข้าม server→client เป็น string เสมอ) */
export interface DocPropsJson {
  standard?: Record<string, string | undefined>;
  extended?: Record<string, number | string | undefined>;
  custom?: Record<string, string | number | boolean | null>;
}

/** รูป return ของ /api/template/extract — ใช้ร่วม 2 ที่: route นั้นคืนทั้งก้อนตรง ๆ
 *  และ POST /api/documents/versions เก็บทั้งก้อนเป็น fields ของ version (2026-10-30) */
export interface DocumentExtractSnapshot {
  /** ค่า Content Control `{ [tag]: text }` */
  cc: ExtractedData;
  /** ข้อความใน bookmark `{ [name]: text }` */
  bookmark: ExtractedData;
  /** document properties (standard/extended/custom) */
  properties: DocPropsJson;
  /** ผลตรวจ ticket ที่ stamp มากับไฟล์ — exp (ฟอร์แมตไทย) + HmacSha256/Ed25519 เฉพาะเมื่อ
   *  ผู้เรียกส่ง secret/publicKeyHex มาให้ใช้ตรวจ */
  verify: Record<string, unknown>;
}

/** แกะข้อมูลจาก docx ทั้งชุด `{cc, bookmark, properties, verify}` — logic ย้ายมาจาก
 *  app/api/template/extract/route.ts แบบเดิม (แถวต่อแถว) เพื่อให้ return ของ extract
 *  กับ fields ของ version ที่สร้างใหม่ตรงกันเป๊ะโดยการก่อสร้าง
 *  · secret/publicKeyHex = ของผู้เรียกเพื่อ "ทดสอบ verify" (extract) หรือ secret ของ
 *    add-in ticket ฝั่ง server (ตอนสร้าง version) — ไม่ส่ง = ไม่มี key นั้นใน verify
 *  · ticket_data ที่ไม่ใช่ JSON จะ throw ผู้เรียกจัดการเอง (extract = 500 / versions = 400) */
export function extractDocumentSnapshot(
  docxBuffer: Buffer,
  options: { secret?: string; publicKeyHex?: string } = {},
): DocumentExtractSnapshot {
  const cc = extractContentControls(docxBuffer);
  const bookmark = extractBookmark(docxBuffer);
  // JSON-safe ทันที (Date → ISO string): response ของ extract กับ jsonb ของ version ได้
  // ค่าชนิดเดียวกัน (NextResponse.json / drizzle serialize Date เป็น ISO อยู่แล้ว —
  // ผลลัพธ์ JSON ไม่ต่างจากเดิม เปลี่ยนแค่ชนิดฝั่ง TS)
  const properties = JSON.parse(JSON.stringify(getDocProps(docxBuffer))) as DocPropsJson;

  const verify: Record<string, unknown> = {};
  const ticket_data = properties.custom?.ticket_data;
  const HmacSha256 = String(properties.custom?.HmacSha256);
  const Ed25519 = String(properties.custom?.Ed25519);

  if (ticket_data && typeof ticket_data === "string") {
    const ticketDataObj = JSON.parse(ticket_data);
    const unix_timestamp = Number(ticketDataObj.exp) * 1000;
    if (unix_timestamp) {
      verify['exp'] = new Date(unix_timestamp).toLocaleString("th-TH", { timeZone: "Asia/Bangkok" });
    }
    if (options.secret && HmacSha256) {
      verify['HmacSha256'] = verifyHmacSha256(ticket_data, options.secret, HmacSha256);
    }
    if (options.publicKeyHex && Ed25519) {
      verify["Ed25519"] = verifyEd25519(ticket_data, Ed25519, options.publicKeyHex);
    }
  }

  return { cc, bookmark, properties, verify };
}


//**************************** dynamic content *******************************************
// sdtLocked(ห้ามลบ CC), contentLocked(ลบได้ห้ามแก้), sdtContentLocked(ห้ามทุกอย่าง)
type LockType = 'none' | 'sdtLocked' | 'contentLocked' | 'sdtContentLocked';

/**
 * ฟังก์ชันสร้าง Plain Text Content Control XML String ครอบด้วย ||
 * ระวังการเกิดหลายรัน จะทำให้ xml เสีย
 */
function p_cc(title:string,tag:string,text:string='',isMultiLine:boolean=true,lock:LockType='sdtLocked'): string {
    const lockTag = lock=='none'?"":`<w:lock w:val="${lock}" />`
    const multiLineTag = isMultiLine ? '<w:text w:multiLine="1" />':''
    const content = escapeXml(text)
    const xmlString =`<w:sdt><w:sdtPr><w:alias w:val="${title}" /><w:tag w:val="${tag}" /><w:id w:val="-1948841888" />${lockTag}<w:placeholder><w:docPart w:val="C3E615E9D8424D6ABEA7EADA60C3EFB6" /></w:placeholder>${multiLineTag}</w:sdtPr><w:sdtEndPr /><w:sdtContent><w:r><w:rPr><w:rFonts w:cs="TH SarabunPSK" /></w:rPr><w:t xml:space="preserve">${content}</w:t></w:r></w:sdtContent></w:sdt>`
  return `||${xmlString}||`;
}
function br(n: number)
{
    let text=""
    for(let i=0;i<n;i++) text += "<w:br/>"
    return `||${text}||`;
}
function bm(id: number, name: string)
{
    return `||<w:bookmarkStart w:id="${id}" w:name="${name}" /><w:bookmarkEnd w:id="${id}" />||`;
}
/**
 * Escapes XML Special Characters
 */
function escapeXml(unsafe: string): string {
  return unsafe
    .replace(/&/g, '&amp;')
    .replace(/</g, '&lt;')
    .replace(/>/g, '&gt;')
    .replace(/"/g, '&quot;')
    .replace(/'/g, '&apos;');
}
export const templateDynamicContents = async (template: Buffer, data: Record<string, unknown>): Promise<Uint8Array> => {
    return await createReport({
        template, data, cmdDelimiter: ['{{', '}}'],
        additionalJsContext: {
            bm,br,
            p_cc,
        }
    });
}

// สร้างเอกสารจาก เทมเพลต+data render และ generate ใช้งานเหมือนกัน
// ยังไม่ค่อยแน่ใจว่าควรอยู่ใน library นี้หรือเปล่าเพราะมีการทำ hash/sign ticket_data
// - ticket_data ต้องมีข้อมูลสมบูรณ์ {fid,tid,uid,uname}
// - สร้าง signature/hash จาก ticket_data
// - สร้าง Dynamic Content (docx-templates)
// - เอาข้อมูลใส่ Content Control
export async function applyTemplate(templateBuffer:Buffer,templateData:DocumentTemplate,
  secret:string,private_key:string,ttl:number):Promise<Buffer<ArrayBufferLike>>
{
    //Calculate hash
    const originalTicket_data = templateData?.info?.ticket_data //expect valid json string
    // console.log("templateData",templateData?.info?.ticket_data)
    if (originalTicket_data && typeof originalTicket_data === 'string') {
      try {
        const originalTicketObj = JSON.parse(originalTicket_data)//sort and add expire to ticket data
        if (originalTicketObj && typeof originalTicketObj === 'object') {
          console.log("Found valid ticket data: hash it")
          // คำนวณค่า expire (ปัจจุบัน + จำนวนวินาทีที่ต้องการให้หมดอายุ)
          // หาร 1000 เพราะต้องการหน่วยวินาที (sec) ไม่ใช่มิลลิวินาที (ms)
          const expireTimestamp = Math.floor(Date.now() / 1000) + ttl;
          const fullObj = { ...originalTicketObj, exp: expireTimestamp };
          const sortedObj = sortObjectKeys(fullObj);

          // แปลงกลับเป็น JSON string เพื่อนำไปใช้ส่งและทำ Hash
          const ticket_data = JSON.stringify(sortedObj);
          // console.log("check secret:",TEST_SECRET,TEST_PRIVATE_KEY_HEX,ticket_data)
          const HmacSha256 = generateHmacSha256(ticket_data, secret)

          const Ed25519  = signEd25519(ticket_data, private_key)
          templateBuffer = setCustomDocProps(templateBuffer, { ticket_data, HmacSha256, Ed25519 })
        }
      } catch (error) { //just skip
        console.error("Set custom property fail",error);
      }
    }

    // Apply Dynamic Content
    if (templateData?.dc && typeof templateData?.dc === "object") {
      console.log("Apply Dynamic Content")
      templateBuffer = Buffer.from(await templateDynamicContents(templateBuffer, templateData.dc))
    }
    // Apply Content Control
    if (templateData?.cc && typeof templateData?.cc === "object") {
      console.log("Apply Content Control")
      templateBuffer = templateContentControls(templateBuffer, templateData.cc);
    }
    return templateBuffer

}