/* 쿠팡 밀크런 — 출고 폼 동적 라인 / 상품검색 / 박스계산.
   서버가 저장 시 박스 수를 재계산하므로(store.compute_boxes) 여기 계산은 미리보기용. */
(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) {}

  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 upbInput = row.querySelector(".cpg-upb");
    var upb = parseInt(upbInput.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);
    var rem = qty % upb;
    cell.textContent = boxes + "박스" + (rem ? " +" + rem : " (딱맞음)");
  }

  function makeRow(data) {
    data = data || {};
    var tr = document.createElement("tr");
    tr.innerHTML =
      '<td class="cpg-line-no"></td>' +
      '<td><input class="erp-input cpg-code" type="text" autocomplete="off" placeholder="제품코드" /></td>' +
      '<td><input class="erp-input cpg-name" type="text" placeholder="제품명" /></td>' +
      '<td><input class="erp-input cpg-qty" type="number" min="1" style="max-width:90px" /></td>' +
      '<td><input class="erp-input cpg-upb" type="number" min="1" style="max-width:90px" placeholder="입수량" /></td>' +
      '<td><span class="cpg-line-calc">—</span></td>' +
      '<td><input class="erp-input cpg-memo" type="text" /></td>' +
      '<td><button type="button" class="erp-btn erp-btn-outline cpg-line-del">✕</button></td>';
    tr.querySelector(".cpg-code").value = data.product_code || "";
    tr.querySelector(".cpg-name").value = data.product_name_snapshot || data.product_name || "";
    tr.querySelector(".cpg-qty").value = data.quantity || "";
    var upb = data.units_per_box;
    if (upb == null && data.product_code && ruleMap[data.product_code] != null) upb = ruleMap[data.product_code];
    tr.querySelector(".cpg-upb").value = (upb != null ? upb : "");

    tr.querySelector(".cpg-line-del").addEventListener("click", function () {
      tr.remove(); renumber();
    });
    tr.querySelector(".cpg-qty").addEventListener("input", function () { recalc(tr); });
    tr.querySelector(".cpg-upb").addEventListener("input", function () { recalc(tr); });

    var codeInput = tr.querySelector(".cpg-code");
    codeInput.addEventListener("input", function () {
      // 입수량 규칙 자동 채움 (수동값 없을 때)
      var code = codeInput.value.trim();
      if (code && ruleMap[code] != null && !tr.querySelector(".cpg-upb").value) {
        tr.querySelector(".cpg-upb").value = ruleMap[code];
      }
      if (CFG.searchEnabled) scheduleSearch(codeInput, tr);
    });
    codeInput.addEventListener("blur", function () { setTimeout(hidePop, 150); });

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

  function renumber() {
    Array.prototype.forEach.call(body.querySelectorAll("tr"), function (tr, i) {
      tr.querySelector(".cpg-line-no").textContent = i + 1;
    });
  }

  // ── 상품 검색 드롭다운 ──
  var pop = document.getElementById("cpg-search-pop");
  var searchTimer = null;
  function hidePop() { if (pop) { pop.hidden = true; pop.innerHTML = ""; } }

  function scheduleSearch(input, tr) {
    if (!pop) return;
    clearTimeout(searchTimer);
    var q = input.value.trim();
    if (q.length < 1) { hidePop(); return; }
    searchTimer = setTimeout(function () { doSearch(q, input, tr); }, 220);
  }

  function doSearch(q, input, tr) {
    fetch(CFG.searchUrl + "?q=" + encodeURIComponent(q))
      .then(function (r) { return r.json(); })
      .then(function (data) {
        var results = (data && data.results) || [];
        if (!results.length) { hidePop(); return; }
        pop.innerHTML = "";
        results.forEach(function (item) {
          var div = document.createElement("div");
          div.className = "cpg-search-item";
          div.innerHTML = '<span class="cpg-sc"></span><span class="cpg-sn"></span>';
          div.querySelector(".cpg-sc").textContent = item.code;
          div.querySelector(".cpg-sn").textContent = item.name + (item.type ? " · " + item.type : "");
          div.addEventListener("mousedown", function (e) {
            e.preventDefault();
            input.value = item.code;
            tr.querySelector(".cpg-name").value = item.name || "";
            var upb = item.units_per_box != null ? item.units_per_box
                      : (ruleMap[item.code] != null ? ruleMap[item.code] : "");
            if (upb !== "" && !tr.querySelector(".cpg-upb").value) tr.querySelector(".cpg-upb").value = upb;
            recalc(tr);
            hidePop();
          });
          pop.appendChild(div);
        });
        var rect = input.getBoundingClientRect();
        pop.style.left = (window.scrollX + rect.left) + "px";
        pop.style.top = (window.scrollY + rect.bottom + 2) + "px";
        pop.hidden = false;
      })
      .catch(hidePop);
  }

  // ── 초기 라인 ──
  if (initLines.length) { initLines.forEach(makeRow); } else { makeRow(); }

  document.getElementById("cpg-add-line").addEventListener("click", function () { makeRow(); });

  // ── 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; // 빈 라인 스킵 (서버도 스킵)
      var upb = parseInt(tr.querySelector(".cpg-upb").value, 10);
      lines.push({
        product_code: code,
        product_name_snapshot: tr.querySelector(".cpg-name").value.trim(),
        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 (제품코드 + 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);
    // 신규일 때만 자동 동기화 (수정 시 기존 스냅샷 보존)
    if (!centerName.value) syncCenter();
  }
})();