// backend/services/hanaVendorStore.js
// SQL persistence for vendor registrations.
// Schema: uses SAP_B1_COMPANY env var (same as hanaStore.js)
// Table:  ZVENDOR_PORTAL  (auto-created on first run)

const { getPool } = require('./appSqlPool');
const { DEFAULT_COMPANY } = require('./companyConfig');

const DEFAULT_SCHEMA = DEFAULT_COMPANY;
const tbl = (s) => `[dbo].[ZVENDOR_PORTAL]`;

async function exec(sqlQuery, params = []) {
  const pool    = await getPool();
  const request = pool.request();
  params.forEach((param, index) => {
    request.input(`param${index}`, param);
  });
  const replacedSql = sqlQuery.replace(/\?/g, (match, offset, string) => {
    const paramIndex = (string.slice(0, offset).match(/\?/g) || []).length;
    return `@param${paramIndex}`;
  });
  const result = await request.query(replacedSql);
  return result.recordset || [];
}

function isAlreadyExists(e) {
  const m = (e.message || '').toLowerCase();
  return m.includes('already exists')
    || m.includes('duplicate')
    || m.includes('existing object')
    || m.includes('there is already an object');
}

// ── Bootstrap ─────────────────────────────────────────────────────────────────
async function bootstrap(schema) {
  console.log('[VENDOR STORE] Checking table', tbl(schema), '...');

  let tableExisted = false;
  await exec(`
    CREATE TABLE ${tbl(schema)} (
      [ID]                    INT IDENTITY(1,1) PRIMARY KEY,
      [STATUS]                NVARCHAR(30)    DEFAULT 'PENDING',
      [VENDOR_TYPE]           NVARCHAR(20)    DEFAULT 'SUPPLIER',
      [CARD_NAME]             NVARCHAR(100),
      [FOREIGN_NAME]          NVARCHAR(100),
      [TYPE_OF_BUSINESS]      NVARCHAR(50),
      [INDUSTRY]              NVARCHAR(100),
      [PRODUCTS]              NVARCHAR(500),
      [PAYMENT_TERMS]         NVARCHAR(50),
      [CONTACT_FIRST]         NVARCHAR(60),
      [CONTACT_LAST]          NVARCHAR(60),
      [CONTACT_TITLE]         NVARCHAR(60),
      [MOBILE]                NVARCHAR(20),
      [ALT_CONTACT]           NVARCHAR(20),
      [EMAIL]                 NVARCHAR(150),
      [BILL_STREET]           NVARCHAR(200),
      [BILL_BLOCK]            NVARCHAR(100),
      [BILL_CITY]             NVARCHAR(100),
      [BILL_ZIP]              NVARCHAR(20),
      [BILL_STATE]            NVARCHAR(100),
      [BILL_COUNTRY]          NVARCHAR(60),
      [GSTIN]                 NVARCHAR(15),
      [PAN]                   NVARCHAR(10),
      [TAN]                   NVARCHAR(10),
      [CURRENCY]              NVARCHAR(50),
      [HAS_TDS]               NVARCHAR(1)     DEFAULT 'N',
      [TDS_CATEGORY]          NVARCHAR(100),
      [TDS_RATE]              DECIMAL(5,2)    DEFAULT 0,
      [TDS_LDC_NO]            NVARCHAR(50),
      [HAS_MSME]              NVARCHAR(1)     DEFAULT 'N',
      [MSME_NO]               NVARCHAR(30),
      [MSME_TYPE]             NVARCHAR(20),
      [MSME_BTYPE]            NVARCHAR(30),
      [FSSAI_NO]              NVARCHAR(20),
      [REMARKS]               NVARCHAR(MAX),
      [BANK_ACCOUNTS]         NVARCHAR(MAX),
      [ATTACHMENTS]           NVARCHAR(MAX),
      [ALL_BILL_ADDRS]        NVARCHAR(MAX),
      [ALL_SHIP_ADDRS]        NVARCHAR(MAX),
      [USER_ID]               NVARCHAR(50),
      [USER_TYPE]             NVARCHAR(50),
      [USER_DEPT]             NVARCHAR(100),
      [SUBMITTED_AT]          DATETIME2       DEFAULT GETDATE(),
      [MGR_CARD_CODE_PREFIX]  NVARCHAR(20)    DEFAULT 'VENDA',
      [MGR_GROUP_CODE]        INT,
      [MGR_GROUP]             NVARCHAR(100),
      [MGR_PAY_TERMS_CODE]    INT,
      [MGR_PAY_TERMS]         NVARCHAR(100),
      [MGR_PURCHASE_ACCOUNT]  NVARCHAR(20)    DEFAULT '2101001',
      [MGR_PURCHASE_ACCT_NAME] NVARCHAR(100),
      [MGR_CURRENCY]          NVARCHAR(50)    DEFAULT 'Indian Rupee',
      [MGR_LANGUAGE]          NVARCHAR(50)    DEFAULT 'English (UK)',
      [MGR_CREDIT_LIMIT]      DECIMAL(18,2)   DEFAULT 0,
      [MGR_NOTES]             NVARCHAR(MAX),
      [MGR_BRANCH]            NVARCHAR(100),
      [MGR_AREA]              NVARCHAR(100),
      [MGR_TERRITORY]         NVARCHAR(100),
      [MGR_SALES_PERSON_CODE] INT,
      [MGR_SALES_EMPLOYEE]    NVARCHAR(100),
      [MGR_MAIN_GROUP]        NVARCHAR(50),
      [MGR_CHAIN]             NVARCHAR(50),
      [VERIFIED_BY]           NVARCHAR(60),
      [VERIFIED_AT]           DATETIME2,
      [APPROVED_BY]           NVARCHAR(60),
      [APPROVED_AT]           DATETIME2,
      [REJECTED_BY]           NVARCHAR(60),
      [REJECTED_AT]           DATETIME2,
      [SAP_CARD_CODE]         NVARCHAR(30),
      [SAP_ATTACHMENT_ENTRY]  INT,
      [COMPANY]               NVARCHAR(50)    DEFAULT '${DEFAULT_SCHEMA}'
    )
  `).catch(e => {
    if (isAlreadyExists(e)) {
      tableExisted = true;
      console.log('[VENDOR STORE] Table already exists — checking for missing columns...');
    } else {
      throw e;
    }
  });

  // ── Safe migrations — only add columns that don't exist yet ──────────────
  if (tableExisted) {
    const migrations = [
      `IF NOT EXISTS (SELECT 1 FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME='ZVENDOR_PORTAL' AND COLUMN_NAME='MGR_SALES_PERSON_CODE') ALTER TABLE [dbo].[ZVENDOR_PORTAL] ADD [MGR_SALES_PERSON_CODE] INT`,
      `IF NOT EXISTS (SELECT 1 FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME='ZVENDOR_PORTAL' AND COLUMN_NAME='MGR_SALES_EMPLOYEE')    ALTER TABLE [dbo].[ZVENDOR_PORTAL] ADD [MGR_SALES_EMPLOYEE] NVARCHAR(100)`,
      `IF NOT EXISTS (SELECT 1 FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME='ZVENDOR_PORTAL' AND COLUMN_NAME='MGR_MAIN_GROUP')        ALTER TABLE [dbo].[ZVENDOR_PORTAL] ADD [MGR_MAIN_GROUP] NVARCHAR(50)`,
      `IF NOT EXISTS (SELECT 1 FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME='ZVENDOR_PORTAL' AND COLUMN_NAME='MGR_CHAIN')             ALTER TABLE [dbo].[ZVENDOR_PORTAL] ADD [MGR_CHAIN] NVARCHAR(50)`,
      `IF NOT EXISTS (SELECT 1 FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME='ZVENDOR_PORTAL' AND COLUMN_NAME='COMPANY')              ALTER TABLE [dbo].[ZVENDOR_PORTAL] ADD [COMPANY] NVARCHAR(50) DEFAULT '${DEFAULT_SCHEMA}'`,
      `IF NOT EXISTS (SELECT 1 FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME='ZVENDOR_PORTAL' AND COLUMN_NAME='MSME_BTYPE')           ALTER TABLE [dbo].[ZVENDOR_PORTAL] ADD [MSME_BTYPE] NVARCHAR(30)`,
      `IF NOT EXISTS (SELECT 1 FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME='ZVENDOR_PORTAL' AND COLUMN_NAME='FSSAI_NO')             ALTER TABLE [dbo].[ZVENDOR_PORTAL] ADD [FSSAI_NO] NVARCHAR(20)`,
      `IF NOT EXISTS (SELECT 1 FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME='ZVENDOR_PORTAL' AND COLUMN_NAME='ALL_BILL_ADDRS')       ALTER TABLE [dbo].[ZVENDOR_PORTAL] ADD [ALL_BILL_ADDRS] NVARCHAR(MAX)`,
      `IF NOT EXISTS (SELECT 1 FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME='ZVENDOR_PORTAL' AND COLUMN_NAME='ALL_SHIP_ADDRS')       ALTER TABLE [dbo].[ZVENDOR_PORTAL] ADD [ALL_SHIP_ADDRS] NVARCHAR(MAX)`,
      `IF NOT EXISTS (SELECT 1 FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME='ZVENDOR_PORTAL' AND COLUMN_NAME='VERIFIED_BY')          ALTER TABLE [dbo].[ZVENDOR_PORTAL] ADD [VERIFIED_BY] NVARCHAR(60)`,
      `IF NOT EXISTS (SELECT 1 FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME='ZVENDOR_PORTAL' AND COLUMN_NAME='VERIFIED_AT')          ALTER TABLE [dbo].[ZVENDOR_PORTAL] ADD [VERIFIED_AT] DATETIME2`,
      `IF NOT EXISTS (SELECT 1 FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME='ZVENDOR_PORTAL' AND COLUMN_NAME='APPROVED_BY')          ALTER TABLE [dbo].[ZVENDOR_PORTAL] ADD [APPROVED_BY] NVARCHAR(60)`,
      `IF NOT EXISTS (SELECT 1 FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME='ZVENDOR_PORTAL' AND COLUMN_NAME='APPROVED_AT')          ALTER TABLE [dbo].[ZVENDOR_PORTAL] ADD [APPROVED_AT] DATETIME2`,
      `IF NOT EXISTS (SELECT 1 FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME='ZVENDOR_PORTAL' AND COLUMN_NAME='REJECTED_BY')          ALTER TABLE [dbo].[ZVENDOR_PORTAL] ADD [REJECTED_BY] NVARCHAR(60)`,
      `IF NOT EXISTS (SELECT 1 FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME='ZVENDOR_PORTAL' AND COLUMN_NAME='REJECTED_AT')          ALTER TABLE [dbo].[ZVENDOR_PORTAL] ADD [REJECTED_AT] DATETIME2`,
      `IF NOT EXISTS (SELECT 1 FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME='ZVENDOR_PORTAL' AND COLUMN_NAME='SAP_ATTACHMENT_ENTRY') ALTER TABLE [dbo].[ZVENDOR_PORTAL] ADD [SAP_ATTACHMENT_ENTRY] INT`,
    ];
    for (const migration of migrations) {
      await exec(migration).catch(e => {
        console.warn('[VENDOR STORE] Migration warning:', e.message);
      });
    }
    console.log('[VENDOR STORE] ✅ Column migration check complete');
  }

  console.log('[VENDOR STORE] ✅ Table ready:', tbl(schema));
}

// ── Row → JS object ───────────────────────────────────────────────────────────
function rowToVendor(row) {
  if (!row) return null;
  let bankAccounts = [];
  let attachments  = {};
  try { bankAccounts = JSON.parse(row.BANK_ACCOUNTS || '[]'); } catch (_) {}
  try { attachments  = JSON.parse(row.ATTACHMENTS   || '{}'); } catch (_) {}

  return {
    id:                   row.ID,
    status:               row.STATUS,
    vendorType:           row.VENDOR_TYPE           || 'SUPPLIER',
    cardName:             row.CARD_NAME             || '',
    foreignName:          row.FOREIGN_NAME          || '',
    typeOfBusiness:       row.TYPE_OF_BUSINESS      || '',
    industry:             row.INDUSTRY              || '',
    products:             row.PRODUCTS              || '',
    paymentTerms:         row.PAYMENT_TERMS         || '30 Days',
    contactFirst:         row.CONTACT_FIRST         || '',
    contactLast:          row.CONTACT_LAST          || '',
    contactTitle:         row.CONTACT_TITLE         || '',
    mobile:               row.MOBILE                || '',
    altContact:           row.ALT_CONTACT           || '',
    email:                row.EMAIL                 || '',
    billStreet:           row.BILL_STREET           || '',
    billBlock:            row.BILL_BLOCK            || '',
    billCity:             row.BILL_CITY             || '',
    billZip:              row.BILL_ZIP              || '',
    billState:            row.BILL_STATE            || '',
    billCountry:          row.BILL_COUNTRY          || 'India',
    gstin:                row.GSTIN                 || '',
    pan:                  row.PAN                   || '',
    tan:                  row.TAN                   || '',
    currency:             row.CURRENCY              || 'Indian Rupee',
    hasTds:               row.HAS_TDS === 'Y',
    tdsCategory:          row.TDS_CATEGORY          || '',
    tdsRate:              Number(row.TDS_RATE)      || 0,
    tdsLdcNo:             row.TDS_LDC_NO            || '',
    hasMsme:              row.HAS_MSME === 'Y',
    msmeNo:               row.MSME_NO               || '',
    msmeType:             row.MSME_TYPE             || '',
    msmeBType:            row.MSME_BTYPE            || '',
    fssaiNo:              row.FSSAI_NO              || '',
    remarks:              row.REMARKS               || '',
    bankAccounts,
    attachments,
    allBillAddresses:     safeJson(row.ALL_BILL_ADDRS, []),
    allShipAddresses:     safeJson(row.ALL_SHIP_ADDRS, []),
    userId:               row.USER_ID               || '',
    userType:             row.USER_TYPE             || '',
    userDept:             row.USER_DEPT             || '',
    submittedAt:          row.SUBMITTED_AT          ? new Date(row.SUBMITTED_AT).toISOString() : null,
    mgrCardCodePrefix:    row.MGR_CARD_CODE_PREFIX  || 'VENDA',
    mgrGroupCode:         row.MGR_GROUP_CODE,
    mgrGroup:             row.MGR_GROUP             || '',
    mgrPayTermsCode:      row.MGR_PAY_TERMS_CODE,
    mgrPayTerms:          row.MGR_PAY_TERMS         || '',
    mgrPurchaseAccount:   row.MGR_PURCHASE_ACCOUNT  || '2101001',
    mgrPurchaseAcctName:  row.MGR_PURCHASE_ACCT_NAME|| '',
    mgrCurrency:          row.MGR_CURRENCY          || 'Indian Rupee',
    mgrLanguage:          row.MGR_LANGUAGE          || 'English (UK)',
    mgrCreditLimit:       Number(row.MGR_CREDIT_LIMIT) || 0,
    mgrNotes:             row.MGR_NOTES             || '',
    mgrBranch:            row.MGR_BRANCH            || '',
    mgrArea:              row.MGR_AREA              || '',
    mgrTerritory:         row.MGR_TERRITORY         || '',
    mgrSalesPersonCode:   row.MGR_SALES_PERSON_CODE || null,
    mgrSalesEmployee:     row.MGR_SALES_EMPLOYEE    || '',
    mgrMainGroup:         row.MGR_MAIN_GROUP        || '',
    mgrChain:             row.MGR_CHAIN             || '',
    verifiedBy:           row.VERIFIED_BY           || null,
    verifiedAt:           row.VERIFIED_AT           ? new Date(row.VERIFIED_AT).toISOString() : null,
    approvedBy:           row.APPROVED_BY           || null,
    approvedAt:           row.APPROVED_AT           ? new Date(row.APPROVED_AT).toISOString() : null,
    rejectedBy:           row.REJECTED_BY           || null,
    rejectedAt:           row.REJECTED_AT           ? new Date(row.REJECTED_AT).toISOString() : null,
    sapCardCode:          row.SAP_CARD_CODE         || null,
    sapAttachmentEntry:   row.SAP_ATTACHMENT_ENTRY  || null,
    company:              row.COMPANY               || '',
  };
}

function safeJson(v, fb) {
  if (!v) return fb;
  try { return JSON.parse(v); } catch (_) { return fb; }
}

// ── Helpers ───────────────────────────────────────────────────────────────────
function toTs(isoStr) {
  if (!isoStr) return null;
  return isoStr.replace('T', ' ').replace('Z', '').substring(0, 23);
}

function s(v, max) {
  if (v === null || v === undefined) return null;
  const str = String(v);
  return max ? str.substring(0, max) : str;
}

// ── INSERT ────────────────────────────────────────────────────────────────────
async function insertVendor(data, _schema) {
  const now = toTs(new Date().toISOString());

  // INSERT and SELECT SCOPE_IDENTITY() must be one batch — as two separate
  // exec() calls, a pooled connection can route the second one to a
  // DIFFERENT physical connection than the one that just inserted, where
  // SCOPE_IDENTITY() correctly returns NULL (see workOrderStore.js's
  // insertWorkOrder() for the full write-up of this bug class).
  const idRows = await exec(`
    INSERT INTO ${tbl()} (
      [VENDOR_TYPE],[CARD_NAME],[FOREIGN_NAME],[TYPE_OF_BUSINESS],[INDUSTRY],
      [PRODUCTS],[PAYMENT_TERMS],
      [CONTACT_FIRST],[CONTACT_LAST],[CONTACT_TITLE],
      [MOBILE],[ALT_CONTACT],[EMAIL],
      [BILL_STREET],[BILL_BLOCK],[BILL_CITY],[BILL_ZIP],[BILL_STATE],[BILL_COUNTRY],
      [GSTIN],[PAN],[TAN],[CURRENCY],
      [HAS_TDS],[TDS_CATEGORY],[TDS_RATE],[TDS_LDC_NO],
      [HAS_MSME],[MSME_NO],[MSME_TYPE],[MSME_BTYPE],[FSSAI_NO],
      [REMARKS],[BANK_ACCOUNTS],[ATTACHMENTS],
      [ALL_BILL_ADDRS],[ALL_SHIP_ADDRS],
      [USER_ID],[USER_TYPE],[USER_DEPT],
      [SUBMITTED_AT],
      [MGR_CARD_CODE_PREFIX],[MGR_PURCHASE_ACCOUNT],[MGR_CURRENCY],[MGR_LANGUAGE],
      [COMPANY]
    ) VALUES (
      ?,?,?,?,?,
      ?,?,
      ?,?,?,
      ?,?,?,
      ?,?,?,?,?,?,
      ?,?,?,?,
      ?,?,?,?,
      ?,?,?,?,?,
      ?,?,?,
      ?,?,
      ?,?,?,
      ?,
      ?,?,?,?,
      ?
    );
    SELECT SCOPE_IDENTITY() AS ID;
  `, [
    s(data.vendorType        || 'SUPPLIER', 20),
    s(data.cardName,            100),
    s(data.foreignName       || '', 100),
    s(data.typeOfBusiness    || 'Company', 50),
    s(data.industry          || '', 100),
    s(data.products          || '', 500),
    s(data.paymentTerms      || '30 Days', 50),
    s(data.contactFirst,        60),
    s(data.contactLast,         60),
    s(data.contactTitle      || '', 60),
    s(data.mobile            || '', 20),
    s(data.altContact        || '', 20),
    s(data.email,               150),
    s(data.billStreet        || '', 200),
    s(data.billBlock         || '', 100),
    s(data.billCity          || '', 100),
    s(data.billZip           || '', 20),
    s(data.billState         || '', 100),
    s(data.billCountry       || 'India', 60),
    s(data.gstin             || '', 15),
    s(data.pan               || '', 10),
    s(data.tan               || '', 10),
    s(data.currency          || 'Indian Rupee', 50),
    data.hasTds  ? 'Y' : 'N',
    s(data.tdsCategory       || '', 100),
    parseFloat(data.tdsRate) || 0,
    s(data.tdsLdcNo          || '', 50),
    data.hasMsme ? 'Y' : 'N',
    s(data.msmeNo            || '', 30),
    s(data.msmeType          || '', 20),
    s(data.msmeBType         || '', 30),
    s(data.fssaiNo           || '', 20),
    data.remarks             || '',
    JSON.stringify(data.bankAccounts      || []),
    JSON.stringify(data.attachments       || {}),
    JSON.stringify(data.allBillAddresses  || []),
    JSON.stringify(data.allShipAddresses  || []),
    s(data.userId            || '', 50),
    s(data.userType          || '', 50),
    s(data.userDept          || '', 100),
    now,
    s(data.mgrCardCodePrefix  || 'VENDA', 20),
    s(data.mgrPurchaseAccount || '2101001', 20),
    s(data.mgrCurrency        || 'Indian Rupee', 50),
    s(data.mgrLanguage        || 'English (UK)', 50),
    s(data.company            || '', 50),
  ]);
  const id = idRows[0].ID;
  console.log(`[VENDOR STORE] ✅ Inserted ID=${id} — ${data.cardName}`);
  return { id };
}

// ── FIND BY ID ────────────────────────────────────────────────────────────────
async function findById(id, companyDB) {
  const rows = await exec(
    `SELECT * FROM ${tbl()} WHERE [ID] = ?`,
    [parseInt(id)]
  );
  return rowToVendor(rows[0]);
}

// ── LIST BY STATUS ────────────────────────────────────────────────────────────
async function listByStatus(status, companyDB) {
  let rows;
  if (status === 'ALL') {
    rows = await exec(`SELECT * FROM ${tbl()} ORDER BY [SUBMITTED_AT] DESC`);
  } else {
    rows = await exec(
      `SELECT * FROM ${tbl()} WHERE [STATUS] = ? ORDER BY [SUBMITTED_AT] DESC`,
      [status.toUpperCase()]
    );
  }
  let result = rows.map(rowToVendor);
  if (companyDB) result = result.filter(r => r.company === companyDB);
  return result;
}

// ── UPDATE ────────────────────────────────────────────────────────────────────
async function updateVendor(id, patch, _schema) {
  if (!patch || Object.keys(patch).length === 0) return;

  const COL_MAP = {
    status:               'STATUS',
    vendorType:           'VENDOR_TYPE',
    cardName:             'CARD_NAME',
    foreignName:          'FOREIGN_NAME',
    typeOfBusiness:       'TYPE_OF_BUSINESS',
    industry:             'INDUSTRY',
    products:             'PRODUCTS',
    paymentTerms:         'PAYMENT_TERMS',
    contactFirst:         'CONTACT_FIRST',
    contactLast:          'CONTACT_LAST',
    contactTitle:         'CONTACT_TITLE',
    mobile:               'MOBILE',
    altContact:           'ALT_CONTACT',
    email:                'EMAIL',
    billStreet:           'BILL_STREET',
    billBlock:            'BILL_BLOCK',
    billCity:             'BILL_CITY',
    billZip:              'BILL_ZIP',
    billState:            'BILL_STATE',
    billCountry:          'BILL_COUNTRY',
    gstin:                'GSTIN',
    pan:                  'PAN',
    tan:                  'TAN',
    currency:             'CURRENCY',
    hasTds:               'HAS_TDS',
    tdsCategory:          'TDS_CATEGORY',
    tdsRate:              'TDS_RATE',
    tdsLdcNo:             'TDS_LDC_NO',
    hasMsme:              'HAS_MSME',
    msmeNo:               'MSME_NO',
    msmeType:             'MSME_TYPE',
    msmeBType:            'MSME_BTYPE',
    fssaiNo:              'FSSAI_NO',
    remarks:              'REMARKS',
    bankAccounts:         'BANK_ACCOUNTS',
    attachments:          'ATTACHMENTS',
    allBillAddresses:     'ALL_BILL_ADDRS',
    allShipAddresses:     'ALL_SHIP_ADDRS',
    verifiedBy:           'VERIFIED_BY',
    verifiedAt:           'VERIFIED_AT',
    approvedBy:           'APPROVED_BY',
    approvedAt:           'APPROVED_AT',
    rejectedBy:           'REJECTED_BY',
    rejectedAt:           'REJECTED_AT',
    sapCardCode:          'SAP_CARD_CODE',
    sapAttachmentEntry:   'SAP_ATTACHMENT_ENTRY',
    mgrCardCodePrefix:    'MGR_CARD_CODE_PREFIX',
    mgrGroupCode:         'MGR_GROUP_CODE',
    mgrGroup:             'MGR_GROUP',
    mgrPayTermsCode:      'MGR_PAY_TERMS_CODE',
    mgrPayTerms:          'MGR_PAY_TERMS',
    mgrPurchaseAccount:   'MGR_PURCHASE_ACCOUNT',
    mgrPurchaseAcctName:  'MGR_PURCHASE_ACCT_NAME',
    mgrCurrency:          'MGR_CURRENCY',
    mgrLanguage:          'MGR_LANGUAGE',
    mgrCreditLimit:       'MGR_CREDIT_LIMIT',
    mgrNotes:             'MGR_NOTES',
    mgrBranch:            'MGR_BRANCH',
    mgrArea:              'MGR_AREA',
    mgrTerritory:         'MGR_TERRITORY',
    mgrSalesPersonCode:   'MGR_SALES_PERSON_CODE',
    mgrSalesEmployee:     'MGR_SALES_EMPLOYEE',
    mgrMainGroup:         'MGR_MAIN_GROUP',
    mgrChain:             'MGR_CHAIN',
    company:              'COMPANY',
  };

  const BOOL_COLS   = new Set(['HAS_TDS', 'HAS_MSME']);
  const JSON_COLS   = new Set(['BANK_ACCOUNTS', 'ATTACHMENTS', 'ALL_BILL_ADDRS', 'ALL_SHIP_ADDRS']);
  const NUMBER_COLS = new Set(['MGR_GROUP_CODE', 'MGR_PAY_TERMS_CODE', 'MGR_CREDIT_LIMIT', 'TDS_RATE', 'SAP_ATTACHMENT_ENTRY', 'MGR_SALES_PERSON_CODE']);
  const TS_COLS     = new Set(['VERIFIED_AT', 'APPROVED_AT', 'REJECTED_AT']);

  const setClauses = [];
  const vals       = [];

  Object.entries(patch).forEach(([k, v]) => {
    const col = COL_MAP[k];
    if (!col) return;
    setClauses.push(`[${col}] = ?`);
    if (BOOL_COLS.has(col)) {
      vals.push(v ? 'Y' : 'N');
    } else if (JSON_COLS.has(col)) {
      vals.push(JSON.stringify(v || (col === 'ATTACHMENTS' ? {} : [])));
    } else if (NUMBER_COLS.has(col)) {
      vals.push(v === null || v === undefined ? null : Number(v));
    } else if (TS_COLS.has(col)) {
      vals.push(v ? toTs(v) : null);
    } else {
      vals.push(v === null || v === undefined ? null : String(v));
    }
  });

  if (!setClauses.length) return;

  vals.push(parseInt(id));
  await exec(
    `UPDATE ${tbl()} SET ${setClauses.join(', ')} WHERE [ID] = ?`,
    vals
  );
  console.log(`[VENDOR STORE] ✅ Updated ID=${id} (${setClauses.length} fields)`);
}

module.exports = { bootstrap, insertVendor, findById, listByStatus, updateVendor };