/**
 * Copyright (c) 2026 Niolla
 * All rights reserved.
 *
 * This source code is proprietary and confidential.
 * Unauthorized copying, modification, distribution, or use
 * of this file, via any medium, is strictly prohibited.
 */

// app/utils/document.util.js

const { Document } = require("../models");
const { generateId, generateDocumentReferenceNo } = require("./idGen.util");
const {log} = require("./consoleLog.utill");

const DOCUMENT_STATUS = {
  DRAFT: "DRAFT",
  FINAL: "FINAL",
};

const validateStatus = (status) => {
  if (!Object.values(DOCUMENT_STATUS).includes(status)) {
    throw new Error(
      `Invalid status "${status}". Allowed values: ${Object.values(
        DOCUMENT_STATUS,
      ).join(", ")}`,
    );
  }
};

const createDraftDocument = async (document, doc_data) => {
  log("Creating draft document data...");
  log("Incoming document data:", JSON.stringify(doc_data, null, 2));
  const result = await Document.create({
    doc_id: generateId(),
    reference_no: doc_data.reference_no || "N/A",
    doc_type: document,
    data: doc_data,
    status: DOCUMENT_STATUS.DRAFT,
  });

  log("Draft document created with ID:", result.doc_id);

  return result;

};

const finalizeDocument = async (document, doc_data) => {
  if (!doc_data.doc_id) {
    throw new Error("Document data ID is required for FINAL status.");
  }

  const [updatedRows] = await Document.update(
    {
      reference_no: doc_data.reference_no || "N/A",
      doc_type: document,
      data: doc_data,
      status: DOCUMENT_STATUS.FINAL,
    },
    {
      where: {
        doc_id: doc_data.doc_id,
      },
    },
  );

  if (updatedRows === 0) {
    throw new Error("Document data not found or already updated.");
  }

  return await Document.findOne({
    where: {
      doc_id: doc_data.doc_id,
    },
  });
};

const createDocumentData = async (document, doc_data, status) => {
  try {
    validateStatus(status);

    switch (status) {
      case DOCUMENT_STATUS.DRAFT:
        return await createDraftDocument(document, doc_data);

      case DOCUMENT_STATUS.FINAL:
        return await finalizeDocument(document, doc_data);

      default:
        throw new Error(`Unhandled document status: ${status}`);
    }
  } catch (error) {
    console.error("❌ Document data operation failed:", error.message);
    throw error;
  }
};

module.exports = {
  createDocumentData,
  DOCUMENT_STATUS,
};