/* 쿠팡 밀크런 — 출고 폼 동적 라인.
   제품명 드롭다운(설정에서 등록한 카탈로그) 선택 → 제품코드 자동 입력.
   수량 입력 시 박스 수 미리보기(서버가 저장 시 store.compute_boxes 로 재계산). */
(function () {
  "use strict";
  var CFG = window.CPG || {};
  var body = document.getElementById("cpg-lines-body");
  var form = document.getElementById("cpg-form");
  if (!body || !form) return;

  // 입수량 규칙: product_code -> units_per_box
  var ruleMap = {};
  try {
    var rules = JSON.parse(document.getElementById("cpg-box-rules").textContent || "[]");
    rules.forEach(function (r) { if (r.active !== false) ruleMap[r.product_code] = r.units_per_box; });
  } catch (e) {}

  // 제품 카탈로그: [{product_code, product_name}]
  var products = [];
  try { products = JSON.parse(document.getElementById("cpg-products").textContent || "[]"); } catch (e) {}
  var nameByCode = {};
  products.forEach(function (p) { nameByCode[p.product_code] = p.product_name; });

  var initLines = [];
  try { initLines = JSON.parse(document.getElementById("cpg-init-lines").textContent || "[]"); } catch (e) {}

  function ceilDiv(a, b) { return Math.ceil(a / b); }

  function recalc(row) {
    var qty = parseInt(row.querySelector(".cpg-qty").value, 10) || 0;
    var upb = parseInt(row.querySelector(".cpg-upb").value, 10);
    var cell = row.querySelector(".cpg-line-calc");
    if (!upb || upb <= 0) { cell.textContent = "미설정"; cell.classList.add("cpg-warn"); return; }
    cell.classList.remove("cpg-warn");
    if (qty <= 0) { cell.textContent = "—"; return; }
    var boxes = ceilDiv(qty, upb), rem = qty % upb;
    cell.textContent = boxes + "박스" + (rem ? " +" + rem : " (딱맞음)");
  }

  function buildNameSelect(selectedCode) {
    var sel = document.createElement("select");
    sel.className = "erp-select cpg-name-sel";
    var opt0 = document.createElement("option");
    opt0.value = ""; opt0.textContent = "— 제품명 선택 —";
    sel.appendChild(opt0);
    var found = false;
    products.forEach(function (p) {
      var o = document.createElement("option");
      o.value = p.product_code;
      o.textContent = p.product_name;
      o.setAttribute("data-name", p.product_name);
      if (p.product_code === selectedCode) { o.selected = true; found = true; }
      sel.appendChild(o);
    });
    // 카탈로그에 없는 기존 라인 코드 → 임시 옵션으로 표시
    if (selectedCode && !found) {
      var o = document.createElement("option");
      o.value = selectedCode;
      o.textContent = (nameByCode[selectedCode] || selectedCode) + " (미등록)";
      o.setAttribute("data-name", nameByCode[selectedCode] || selectedCode);
      o.selected = true;
      sel.appendChild(o);
    }
    return sel;
  }

  function makeRow(data) {
    data = data || {};
    var tr = document.createElement("tr");
    // 컬럼: 체크 / 제품명(select) / 제품코드 / 수량 / 입수량 / 박스계산 / 라인메모
    tr.innerHTML =
      '<td class="cpg-check-col"><input type="checkbox" class="cpg-row-check" /></td>' +
      '<td class="cpg-cell-name"></td>' +
      '<td><input class="erp-input cpg-code" type="text" placeholder="제품코드" /></td>' +
      '<td><input class="erp-input cpg-qty" type="number" min="1" /></td>' +
      '<td><input class="erp-input cpg-upb" type="number" min="1" placeholder="입수량" /></td>' +
      '<td><span class="cpg-line-calc">—</span></td>' +
      '<td><input class="erp-input cpg-memo" type="text" /></td>';

    var code = data.product_code || "";
    var nameSel = buildNameSelect(code);
    tr.querySelector(".cpg-cell-name").appendChild(nameSel);

    var codeInput = tr.querySelector(".cpg-code");
    codeInput.value = code;
    tr.querySelector(".cpg-qty").value = data.quantity || "";
    var upb = data.units_per_box;
    if (upb == null && code && ruleMap[code] != null) upb = ruleMap[code];
    tr.querySelector(".cpg-upb").value = (upb != null ? upb : "");

    // 제품명 선택 → 코드 자동 입력 + 입수량 자동
    nameSel.addEventListener("change", function () {
      var c = nameSel.value;
      codeInput.value = c;
      if (c && ruleMap[c] != null) tr.querySelector(".cpg-upb").value = ruleMap[c];
      recalc(tr);
    });
    // 코드 직접 입력 시 입수량 규칙 자동
    codeInput.addEventListener("input", function () {
      var c = codeInput.value.trim();
      if (c && ruleMap[c] != null && !tr.querySelector(".cpg-upb").value) {
        tr.querySelector(".cpg-upb").value = ruleMap[c];
      }
    });

    tr.querySelector(".cpg-qty").addEventListener("input", function () { recalc(tr); });
    tr.querySelector(".cpg-upb").addEventListener("input", function () { recalc(tr); });

    body.appendChild(tr);
    recalc(tr);
    syncCheckAll();
    return tr;
  }

  // 전체 선택 체크박스 상태 동기화
  var checkAll = document.getElementById("cpg-check-all");
  function syncCheckAll() {
    if (!checkAll) return;
    var checks = body.querySelectorAll(".cpg-row-check");
    var total = checks.length;
    var on = 0;
    Array.prototype.forEach.call(checks, function (c) { if (c.checked) on++; });
    checkAll.checked = total > 0 && on === total;
    checkAll.indeterminate = on > 0 && on < total;
  }
  if (checkAll) {
    checkAll.addEventListener("change", function () {
      Array.prototype.forEach.call(body.querySelectorAll(".cpg-row-check"), function (c) {
        c.checked = checkAll.checked;
      });
    });
  }
  body.addEventListener("change", function (e) {
    if (e.target && e.target.classList.contains("cpg-row-check")) syncCheckAll();
  });

  // 초기 라인
  if (initLines.length) { initLines.forEach(makeRow); } else { makeRow(); }
  document.getElementById("cpg-add-line").addEventListener("click", function () { makeRow(); });

  // 선택 라인 삭제 (체크된 행 삭제, 최소 1줄 유지)
  var delBtn = document.getElementById("cpg-del-line");
  if (delBtn) {
    delBtn.addEventListener("click", function () {
      var checked = body.querySelectorAll(".cpg-row-check:checked");
      if (!checked.length) { alert("삭제할 라인을 선택하세요."); return; }
      Array.prototype.forEach.call(checked, function (c) {
        var tr = c.closest("tr");
        if (tr) tr.remove();
      });
      if (!body.querySelectorAll("tr").length) makeRow(); // 최소 1줄
      if (checkAll) { checkAll.checked = false; checkAll.indeterminate = false; }
      syncCheckAll();
    });
  }

  // 제출: 라인 직렬화
  form.addEventListener("submit", function (e) {
    var lines = [];
    Array.prototype.forEach.call(body.querySelectorAll("tr"), function (tr) {
      var code = tr.querySelector(".cpg-code").value.trim();
      var qty = parseInt(tr.querySelector(".cpg-qty").value, 10) || 0;
      if (!code || qty <= 0) return;
      var upb = parseInt(tr.querySelector(".cpg-upb").value, 10);
      var sel = tr.querySelector(".cpg-name-sel");
      var name = "";
      if (sel && sel.selectedIndex >= 0) {
        var opt = sel.options[sel.selectedIndex];
        name = opt ? (opt.getAttribute("data-name") || "") : "";
      }
      if (!name) name = nameByCode[code] || code;
      lines.push({
        product_code: code,
        product_name_snapshot: name,
        quantity: qty,
        units_per_box: (upb > 0 ? upb : null),
        memo: tr.querySelector(".cpg-memo").value.trim()
      });
    });
    if (!lines.length) {
      e.preventDefault();
      alert("품목 라인을 최소 1개 입력하세요 (제품명/코드 + 수량).");
      return;
    }
    document.getElementById("cpg-lines-json").value = JSON.stringify(lines);
  });

  // 입고센터 select → 스냅샷 hidden 동기화
  var centerSel = document.getElementById("cpg-center-select");
  var centerName = document.getElementById("cpg-center-name");
  if (centerSel && centerName) {
    function syncCenter() {
      var opt = centerSel.options[centerSel.selectedIndex];
      if (opt && opt.value) centerName.value = opt.getAttribute("data-name") || opt.text;
    }
    centerSel.addEventListener("change", syncCenter);
    if (!centerName.value) syncCenter();
  }
})();