/**
 * 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/templates/documents/creditNote/creditNote.template.js

const { log } = require("../../../utils/consoleLog.utill");

module.exports = async (data) => {
  log("📋 Preparing Credit Note data for PDF...");

  let payload = data;

  if (typeof payload === "string") {
    try {
      payload = JSON.parse(payload);
    } catch (error) {
      payload = {};
    }
  }

  const source = payload.documentData || payload.document_data || payload.data || payload;

  const pick = (...keys) => {
    for (const key of keys) {
      const value = source?.[key];
      if (value !== undefined && value !== null && value !== "") {
        return value;
      }
    }

    return "";
  };

  // Normalize incoming fields and provide defaults matching the screenshot
  const company = {
    name: pick("companyName", "company_name") || "GREEK-LANKA MARITIME SERVICES (PVT) LTD",
    addressLine1: pick("companyAddressLine1", "company_address_line1") || "No. 56/2, Dharmapala Mw, Kotte",
    addressLine2: pick("companyAddressLine2", "company_address_line2") || "Sri Jayewardenepura",
    addressLine3: pick("companyAddressLine3", "company_address_line3") || "Sri Lanka",
    postal: pick("companyPostal", "company_postal") || "Postal Code : 10100",
    contact: pick("companyContact", "company_contact") || "Tel:+94 11 2083206 / Mobile (24/7) : +94 777 232 271",
    br: pick("companyBR", "company_br") || "BR No : PV 0022630",
    license: pick("companyLicense", "company_license") || "License No : SA00317-2024",
    logoUrl: pick("logoUrl", "logo_url") ||
      "https://res.cloudinary.com/dtthuvvir/image/upload/v1780748661/company_logo_transperent_bg_uullzw.png",
  };

  const header = {
    title: pick("title") || "CREDIT NOTE",
  };

  const billTo = {
    name: pick("billToName", "bill_to_name") || "Master & Owner of MV TEAM VENTURES",
    details: pick("billToDetails", "bill_to_details") || "VRIDHI MARITIME SHIP MANAGEMENT & OPERATION LLC\nOffice No: 2004, The Prism Tower, Dubai",
  };

  const meta = {
    crnNo: pick("crnNo", "crn_no", "creditNoteNumber", "credit_note_number", "reference_no") || "GLMS/COLOMBO/474/CRN01",
    date: pick("date") || new Date().toLocaleDateString(),
  };

  const vessel = {
    name: pick("vesselName", "vessel_name") || 'MV "TEAM VENTURES"',
    grt: pick("grt", "GRT") || "25,543 MT",
    port: pick("port", "port_name") || "REPAIRS AT COLOMBO DOCK YARD",
    imo: pick("imo", "imo_number", "imoNumber") || "9339765",
    agent: pick("nameOfAgent", "name_of_agent", "agent") || "",
    portCountry: pick("portCountry", "port_country") || "COLOMBO / SRI LANKA",
  };

  const orderMeta = {
    orderDate: pick("orderDate", "order_date") || meta.date,
    orderNo: pick("orderNo", "order_no") || "",
    portReference: pick("portReference", "port_reference") || "",
  };

  // Items: array of { description, amount }
  const items = (Array.isArray(source.items) ? source.items : []).map((it) => ({
    description: it.description || it.desc || it.item_name || '',
    amount: Number(it.amount || it.value || it.total || it.totalAmount || 0),
    quantity: it.quantity ?? it.qty ?? '',
    note: it.note || it.notes || '',
  }));

  const computedTotal = items.reduce((s, i) => s + (i.amount || 0), 0);

  const templateData = {
    company,
    header,
    billTo,
    meta,
    vessel,
    orderMeta,
    items,
    totalAmount: Number(pick("totalAmount", "total") || computedTotal),
    approvedBy: pick("approvedBy", "approved_by") || 'GLMS Finance Dept.',
    approvedByLabel: pick("approvedByLabel", "approved_by_label") || 'Approved by GLMS Finance Dept.',
    departmentLabel: pick("departmentLabel", "department_label") || 'GLMS - Accounts Department',
  };

  // Top-level conveniences for templates and pdfRenderer
  templateData.logoUrl = company.logoUrl;
  templateData.creditNoteNumber = templateData.meta.crnNo;
  templateData.date = templateData.meta.date;
  templateData.billToName = templateData.billTo.name;
  templateData.billToDetails = templateData.billTo.details;
  templateData.vessel = templateData.vessel;
  // Provide invoiceNumber if present
  templateData.invoiceNumber = pick("invoiceNumber", "invoice_number", "invoice_no") || '';

  // Provide subtotal/tax/discount/total for EJS summary table compatibility
  templateData.subtotal = Number(pick("subtotal", "sub_total") || computedTotal);
  templateData.tax = Number(pick("tax") || 0);
  templateData.discount = Number(pick("discount") || 0);
  templateData.total = Number(pick("totalAmount", "total") || templateData.subtotal + templateData.tax - templateData.discount);
  // Provide reason / notes
  templateData.reason = pick("reason", "remarks", "notes") || '';
  // Provide paymentTerms and notes for EJS
  templateData.paymentTerms = pick("paymentTerms", "payment_terms") || '';
  templateData.notes = pick("notes", "note") || '';

  log("✅ Credit Note data prepared", JSON.stringify(templateData));

  return templateData;
};