import { API, getAuthHeaders } from '/js/api-config.js';

const yearSel = document.getElementById('year');
const monthSel = document.getElementById('month');
const container = document.getElementById('attendanceTableContainer');

const holidays = [
  '2025-01-01','2025-01-27','2025-01-28','2025-01-29','2025-01-30','2025-01-31',
  '2025-03-01','2025-03-03','2025-05-01','2025-05-05','2025-05-06',
  '2025-06-03','2025-06-06','2025-08-15','2025-10-03','2025-10-09','2025-12-25'
];

const leaveDefaults = {
  '김두수':16,'임영규':16,'반치원':16,'황인용':16,'표영진':15,
  '김윤섭':16,'이창호':16,'최광욱':16,'박현수':14,'조윤호':0
};

let workers = [];

// ✅ 셀렉트 박스 옵션 + 기본 선택 추가
function fillSelectOptions() {
  const currentY = new Date().getFullYear();
  const currentM = String(new Date().getMonth() + 1).padStart(2, '0');

  for (let y = currentY; y <= currentY + 5; y++) {
    const selected = y === currentY ? 'selected' : '';
    yearSel.insertAdjacentHTML('beforeend', `<option value="${y}" ${selected}>${y}</option>`);
  }

  for (let m = 1; m <= 12; m++) {
    const mm = String(m).padStart(2, '0');
    const selected = mm === currentM ? 'selected' : '';
    monthSel.insertAdjacentHTML('beforeend', `<option value="${mm}" ${selected}>${m}월</option>`);
  }
}

// ✅ 작업자 목록 불러오기
async function fetchWorkers() {
  try {
    const res = await fetch(`${API}/workers`, { headers: getAuthHeaders() });
    workers = await res.json();
    workers.sort((a, b) => a.worker_id - b.worker_id);
  } catch (err) {
    alert('작업자 불러오기 실패');
  }
}

// ✅ 출근부 불러오기 (해당 연도 전체)
async function loadAttendance() {
  const year = yearSel.value;
  const month = monthSel.value;
  if (!year || !month) return alert('연도와 월을 선택하세요');

  const lastDay = new Date(+year, +month, 0).getDate();
  const start = `${year}-01-01`;
  const end   = `${year}-12-31`;

  try {
    const res = await fetch(`${API}/workreports?start=${start}&end=${end}`, {
      headers: getAuthHeaders()
    });
    const data = await res.json();
    renderTable(data, year, month, lastDay);
  } catch (err) {
    alert('출근부 로딩 실패');
  }
}

// ✅ 테이블 렌더링
function renderTable(data, year, month, lastDay) {
  container.innerHTML = '';
  const weekdays = ['일','월','화','수','목','금','토'];
  const tbl = document.createElement('table');

  // ⬆️ 헤더 구성
  let thead = `<thead><tr><th rowspan="2">작업자</th>`;
  for (let d = 1; d <= lastDay; d++) thead += `<th>${d}</th>`;
  thead += `<th class="divider" rowspan="2">잔업합계</th><th rowspan="2">사용연차</th><th rowspan="2">잔여연차</th></tr><tr>`;
  for (let d = 1; d <= lastDay; d++) {
    const dow = new Date(+year, +month - 1, d).getDay();
    thead += `<th>${weekdays[dow]}</th>`;
  }
  thead += '</tr></thead>';
  tbl.innerHTML = thead;

  // ⬇️ 본문
  workers.forEach(w => {
    // ✅ 월간 데이터 (표에 표시용)
    const recsThisMonth = data.filter(r =>
      r.worker_id === w.worker_id &&
      new Date(r.date).getFullYear() === +year &&
      new Date(r.date).getMonth() + 1 === +month
    );

    // ✅ 연간 데이터 (연차 계산용)
    const recsThisYear = data.filter(r =>
      r.worker_id === w.worker_id &&
      new Date(r.date).getFullYear() === +year
    );

    let otSum = 0;
    let row = `<tr><td>${w.worker_name}</td>`;

    for (let d = 1; d <= lastDay; d++) {
      const dd = String(d).padStart(2, '0');
      const date = `${year}-${month}-${dd}`;

      const rec = recsThisMonth.find(r => {
        const rDate = new Date(r.date);
        const yyyy = rDate.getFullYear();
        const mm = String(rDate.getMonth() + 1).padStart(2, '0');
        const dd = String(rDate.getDate()).padStart(2, '0');
        return `${yyyy}-${mm}-${dd}` === date;
      });

      const dow = new Date(+year, +month - 1, d).getDay();
      const isWe = dow === 0 || dow === 6;
      const isHo = holidays.includes(date);

      let txt = '', cls = '';
      if (rec) {
        const ot = +rec.overtime_hours || 0;
        if (ot > 0) {
          txt = ot; cls = 'overtime-cell'; otSum += ot;
        } else if (rec.work_details) {
          const d = rec.work_details;
          if (['연차','반차','반반차','조퇴'].includes(d)) {
            txt = d; cls = 'leave';
          } else if (d === '유급') {
            txt = d; cls = 'paid-leave';
          } else if (d === '휴무') {
            txt = d; cls = 'holiday';
          } else {
            txt = d;
          }
        }
      } else {
        txt = (isWe || isHo) ? '휴무' : '';
        cls = (isWe || isHo) ? 'holiday' : 'no-data';
      }

      row += `<td class="${cls}">${txt}</td>`;
    }

    const usedTot = recsThisYear
      .filter(r => ['연차','반차','반반차','조퇴'].includes(r.work_details))
      .reduce((s, r) => s + (
        r.work_details === '연차'     ? 1 :
        r.work_details === '반차'     ? 0.5 :
        r.work_details === '반반차'   ? 0.25 : 0.75
      ), 0);

    const remain = (leaveDefaults[w.worker_name] || 0) - usedTot;

    row += `<td class="divider overtime-sum">${otSum.toFixed(1)}</td>`;
    row += `<td>${usedTot.toFixed(2)}</td><td>${remain.toFixed(2)}</td></tr>`;
    row += `<tr class="separator"><td colspan="${lastDay + 4}"></td></tr>`;

    tbl.insertAdjacentHTML('beforeend', row);
  });

  container.appendChild(tbl);
}

// ✅ 초기 로딩
fillSelectOptions();
fetchWorkers().then(() => {
  loadAttendance(); // 자동 조회
});
document.getElementById('loadAttendance').addEventListener('click', loadAttendance);