/* 말레이시아 창고 랙 보기 — 드래그 재배치 + 저장 + 인쇄 미리보기.
 *
 * - 각 .rv-cell 의 data-entries(JSON)가 진실원천. 드래그 드롭으로 두 칸의
 *   구성(entries)을 맞교환(빈 칸이면 이동). 칸 번호(cell)는 그대로.
 * - 저장: 모든 칸의 현재 구성을 rk_cell/rk_sku/rk_upb/rk_box 병렬배열 hidden
 *   으로 만들어 POST /malaysia/rack/save (서버 reposition_rack).
 * - 인쇄: 체크한 칸을 칸마다 A4 가로 1장으로 미리보기 후 window.print().
 * - 언어: localStorage('mys_lang'). 셀/미리보기 텍스트를 현재 언어로 렌더.
 */
(function () {
  "use strict";

  function lang() { return localStorage.getItem("mys_lang") === "en" ? "en" : "ko"; }
  function t(ko, en) { return lang() === "en" ? en : ko; }
  function fmt(n) { return Number(n || 0).toLocaleString(); }
  function nameOf(e) { return (lang() === "en" ? e.en : e.ko) || e.sku; }

  function getEntries(cell) {
    try { return JSON.parse(cell.getAttribute("data-entries") || "[]"); }
    catch (_) { return []; }
  }
  function setEntries(cell, arr) {
    cell.setAttribute("data-entries", JSON.stringify(arr));
  }

  function renderCell(cell) {
    var items = cell.querySelector(".rv-items");
    if (!items) return;
    var arr = getEntries(cell);
    items.innerHTML = "";
    if (!arr.length) {
      cell.classList.add("is-empty");
      var s = document.createElement("span");
      s.className = "rv-empty-note";
      s.textContent = "—";
      items.appendChild(s);
      return;
    }
    cell.classList.remove("is-empty");
    arr.forEach(function (e) {
      var total = (Number(e.upb) || 0) * (Number(e.box) || 0);
      var wrap = document.createElement("div");
      wrap.className = "rv-item";
      var nm = document.createElement("span");
      nm.className = "rv-name";
      nm.textContent = nameOf(e);
      var calc = document.createElement("span");
      calc.className = "rv-calc";
      calc.innerHTML = fmt(e.upb) + t("개", "ea") + " × " + fmt(e.box) + t("박스", "box")
        + " = <span class=\"rv-qty\">" + fmt(total) + "</span>";
      wrap.appendChild(nm);
      wrap.appendChild(document.createElement("br"));
      wrap.appendChild(calc);
      items.appendChild(wrap);
    });
  }
  function renderAll() {
    document.querySelectorAll(".rv-cell").forEach(renderCell);
  }

  // ── 드래그 재배치 ──
  var dragSrc = null;
  var dirty = false;
  function markDirty() {
    dirty = true;
    var b = document.getElementById("rv-save-btn");
    if (b) b.classList.add("is-dirty");
  }
  function cleanup() {
    if (dragSrc) dragSrc.classList.remove("dragging");
    dragSrc = null;
    document.querySelectorAll(".rv-cell.is-dragover")
      .forEach(function (c) { c.classList.remove("is-dragover"); });
  }
  function onDragStart(e) {
    var cell = e.target.closest(".rv-cell");
    if (!cell) return;
    dragSrc = cell;
    cell.classList.add("dragging");
    e.dataTransfer.effectAllowed = "move";
    try { e.dataTransfer.setData("text/plain", cell.getAttribute("data-cell")); } catch (_) {}
  }
  function onDragOver(e) {
    if (!dragSrc) return;
    e.preventDefault();
    e.dataTransfer.dropEffect = "move";
    var cell = e.target.closest(".rv-cell");
    if (cell && cell !== dragSrc) cell.classList.add("is-dragover");
  }
  function onDragLeave(e) {
    var cell = e.target.closest(".rv-cell");
    if (cell) cell.classList.remove("is-dragover");
  }
  function onDrop(e) {
    e.preventDefault();
    var dst = e.target.closest(".rv-cell");
    if (!dst || !dragSrc || dst === dragSrc) { cleanup(); return; }
    var a = getEntries(dragSrc);
    var b = getEntries(dst);
    setEntries(dragSrc, b);
    setEntries(dst, a);
    renderCell(dragSrc);
    renderCell(dst);
    markDirty();
    cleanup();
  }

  // ── 인쇄 선택(체크박스) → 셀 강조 ──
  function onChange(e) {
    var cb = e.target;
    if (!cb.classList || !cb.classList.contains("rv-pick")) return;
    var cell = cb.closest(".rv-cell");
    if (cell) cell.classList.toggle("is-selected", cb.checked);
  }

  // ── 저장 ──
  function addHidden(parent, name, val) {
    var i = document.createElement("input");
    i.type = "hidden";
    i.name = name;
    i.value = val;
    parent.appendChild(i);
  }
  function save() {
    var fields = document.getElementById("rv-save-fields");
    var form = document.getElementById("rv-save-form");
    if (!fields || !form) return;
    fields.innerHTML = "";
    document.querySelectorAll(".rv-cell").forEach(function (cell) {
      var cc = cell.getAttribute("data-cell");
      getEntries(cell).forEach(function (e) {
        addHidden(fields, "rk_cell", cc);
        addHidden(fields, "rk_sku", e.sku);
        addHidden(fields, "rk_upb", e.upb);
        addHidden(fields, "rk_box", e.box);
      });
    });
    dirty = false;
    form.submit();
  }

  // ── 인쇄 미리보기 ──
  function openPreview() {
    var picked = [].slice.call(document.querySelectorAll(".rv-cell")).filter(function (c) {
      var cb = c.querySelector(".rv-pick");
      return cb && cb.checked;
    });
    if (!picked.length) {
      alert(t("인쇄할 칸을 먼저 선택하세요.", "Select cells to print first."));
      return;
    }
    var pages = document.getElementById("rvp-pages");
    pages.innerHTML = "";
    picked.forEach(function (cell) {
      var arr = getEntries(cell);
      var sheet = document.createElement("div");
      sheet.className = "rvp-sheet";
      var code = document.createElement("div");
      code.className = "rvp-cell-code";
      code.textContent = cell.getAttribute("data-cell");
      sheet.appendChild(code);
      var list = document.createElement("div");
      list.className = "rvp-list";
      if (!arr.length) {
        var em = document.createElement("div");
        em.className = "rvp-empty";
        em.textContent = t("(비어 있음)", "(empty)");
        list.appendChild(em);
      } else {
        arr.forEach(function (e) {
          var total = (Number(e.upb) || 0) * (Number(e.box) || 0);
          var line = document.createElement("div");
          line.className = "rvp-line";
          var nm = document.createElement("span");
          nm.className = "rvp-name";
          nm.textContent = nameOf(e);
          var calc = document.createElement("span");
          calc.className = "rvp-calc";
          calc.textContent = fmt(e.upb) + t("개", "ea") + " × " + fmt(e.box)
            + t("박스", "box") + " = " + fmt(total);
          line.appendChild(nm);
          line.appendChild(calc);
          list.appendChild(line);
        });
      }
      sheet.appendChild(list);
      pages.appendChild(sheet);
    });
    document.getElementById("rvp-overlay").classList.add("is-open");
  }
  function closePreview() {
    document.getElementById("rvp-overlay").classList.remove("is-open");
  }

  document.addEventListener("DOMContentLoaded", function () {
    renderAll();
    var board = document.getElementById("rv-board");
    if (board) {
      board.addEventListener("dragstart", onDragStart);
      board.addEventListener("dragover", onDragOver);
      board.addEventListener("dragleave", onDragLeave);
      board.addEventListener("drop", onDrop);
      board.addEventListener("dragend", cleanup);
      board.addEventListener("change", onChange);
    }
    var sb = document.getElementById("rv-save-btn");
    if (sb) sb.addEventListener("click", save);
    var pb = document.getElementById("rv-print-btn");
    if (pb) pb.addEventListener("click", openPreview);
    var pc = document.getElementById("rvp-close");
    if (pc) pc.addEventListener("click", closePreview);
    var pp = document.getElementById("rvp-print");
    if (pp) pp.addEventListener("click", function () { window.print(); });
    var lt = document.getElementById("mys-lang-toggle");
    if (lt) lt.addEventListener("click", function () { setTimeout(renderAll, 0); });
    window.addEventListener("beforeunload", function (ev) {
      if (dirty) { ev.preventDefault(); ev.returnValue = ""; }
    });
  });
})();