import pkg from 'xlsx';
const { readFile, utils } = pkg;

try {
  const workbook = readFile('c:/Project/HM ITAM/SampleData_PC.xlsx');
  const sheet = workbook.Sheets[workbook.SheetNames[0]];
  const rawRows = utils.sheet_to_json(sheet, { header: 1 });
  
  const corps = new Set();
  
  // 첫 번째 행(헤더) 제외하고 C열(인덱스 2) 데이터 추출
  rawRows.slice(1).forEach(row => {
    if (row[2] !== undefined && row[2] !== null) {
      corps.add(String(row[2]).trim());
    }
  });
  
  const jobs = new Map();
  rawRows.slice(1).forEach(row => {
    const job = String(row[3] || '').trim();
    jobs.set(job, (jobs.get(job) || 0) + 1);
  });

  console.log('--- Unique Jobs in D column ---');
  Array.from(jobs.entries()).forEach(([key, val]) => {
    console.log(`${key}: ${val}대`);
  });
} catch (e) {
  console.error(e);
}