import { useEffect, useMemo, useState } from "react";
import { Trash2, AlertCircle, Plus, Package, CreditCard, Calendar } from "lucide-react";
import { toast } from "sonner";
import type { Attachment, LineItem, Milestone, Quote, Termsheet } from "../../lib/types";
import { api, nextDashedId, nextId } from "../../lib/api";
import { cn } from "../../lib/utils";
import {
  useMaterials,
  useProjects,
  useQuotes,
  useSuppliers,
  useUpdateQuote,
  useDeleteQuote,
  useAddSupplier,
  useAddMaterial,
} from "../../hooks";
import { itemTermsheetIds, matchMaterial, materialById, materialSpecs, supplierById } from "../../lib/quoteUtils";
import { STATUS_LABEL, statusOptionsFor } from "../../lib/constants";
import { faNum } from "../../lib/formatters";
import { normalize } from "../../lib/normalize";
import { Combobox } from "../../components/Combobox";
import { JalaliDatePicker } from "../../components/JalaliDatePicker";
import { NumberInput } from "../../components/NumberInput";
import { MultiSelectCombobox } from "../../components/MultiSelectCombobox";
import { FileList } from "../../components/FileList";
import { TermsheetCard } from "../../components/TermsheetCard";
import { Button } from "../../components/ui/button";
import {
  Dialog,
  DialogContent,
  DialogFooter,
  DialogHeader,
  DialogTitle,
} from "../../components/ui/dialog";

interface EditItemRow {
  key: string;
  origLi?: LineItem;
  cat: string;
  brand: string;
  specs: string[];
  qty: number | null;
  unit: string;
  price: number | null;
  total: number | null;
  tsDomIds: string[];
  acceptedTsId: string | null;
  rejected: boolean;
  restore: boolean;
}

interface EditTsCard {
  key: string;
  domId: string;
  milestones: Milestone[];
}

export interface EditModalProps {
  quoteId: string | null;
  onClose: () => void;
}

export function EditModal({ quoteId, onClose }: EditModalProps) {
  const quotes = useQuotes();
  const suppliers = useSuppliers();
  const materials = useMaterials();
  const projects = useProjects();
  const updateQuote = useUpdateQuote();
  const deleteQuote = useDeleteQuote();
  const addSupplier = useAddSupplier();
  const addMaterial = useAddMaterial();

  const q = useMemo(() => quotes.find((x) => x.id === quoteId) || null, [quotes, quoteId]);

  const hasReceipts = useMemo(() => {
    if (!q) return false;
    if (q.status === "arrived") return true;
    return (q.line_items || []).some(
      (li) => (li.received_qty != null && li.received_qty > 0) || !!li.arrived_date,
    );
  }, [q]);

  const [ready, setReady] = useState(false);
  const [activeTab, setActiveTab] = useState<"items" | "terms" | "dates">("items");
  const [supplierName, setSupplierName] = useState("");
  const [selectedProjects, setSelectedProjects] = useState<string[]>([]);
  const [notes, setNotes] = useState("");
  const [invoices, setInvoices] = useState<Attachment[]>([]);
  const [proformas, setProformas] = useState<Attachment[]>([]);
  const [itemRows, setItemRows] = useState<EditItemRow[]>([]);
  const [tsCards, setTsCards] = useState<EditTsCard[]>([]);
  const [quoteDate, setQuoteDate] = useState<string | null>(null);
  const [expiryDate, setExpiryDate] = useState<string | null>(null);
  const [acceptedDate, setAcceptedDate] = useState<string | null>(null);
  const [arrivedDate, setArrivedDate] = useState<string | null>(null);
  const [status, setStatus] = useState("offered");
  const [showDeleteConfirm, setShowDeleteConfirm] = useState(false);
  const [deleting, setDeleting] = useState(false);

  const handleDelete = async () => {
    if (!q) return;
    setDeleting(true);
    try {
      await deleteQuote.mutateAsync(q.id);
      toast.success("پیشنهاد خرید با موفقیت حذف شد");
      setShowDeleteConfirm(false);
      onClose();
    } catch (err) {
      toast.error(err instanceof Error ? err.message : "حذف پیشنهاد ناموفق بود");
    } finally {
      setDeleting(false);
    }
  };

  const [globalSpecs, setGlobalSpecs] = useState<string[]>([]);
  useEffect(() => {
    let alive = true;
    void api
      .specsList()
      .then((list) => alive && setGlobalSpecs(list))
      .catch(() => {});
    return () => {
      alive = false;
    };
  }, []);

  const specOptions = useMemo(() => {
    const set = new Set<string>();
    globalSpecs.forEach((s) => s && set.add(s));
    materials.forEach((m) => (m.specs || []).forEach((s) => s && set.add(s)));
    itemRows.forEach((r) => r.specs.forEach((s) => s && set.add(s)));
    return [...set].sort((a, b) => a.localeCompare(b, "fa"));
  }, [materials, itemRows, globalSpecs]);

  const projectOptions = useMemo(() => {
    const set = new Set<string>();
    projects.forEach((p) => p.name && set.add(p.name));
    if (q) {
      (q.projects || []).forEach((n) => set.add(n));
      if (q.project) set.add(q.project);
    }
    return [...set].sort((a, b) => a.localeCompare(b, "fa"));
  }, [projects, q]);

  useMemo(() => {
    if (!q) return;
    const sup = supplierById(suppliers, q.supplier_id);
    setSupplierName(sup.name);
    setSelectedProjects(q.projects && q.projects.length ? [...q.projects] : q.project ? [q.project] : []);
    setNotes(q.notes || "");
    setItemRows(
      q.line_items.map((li) => {
        const m = materialById(materials, li.material_id);
        return {
          key: li.id,
          origLi: li,
          cat: m.name || "",
          brand: m.brand || "",
          specs: materialSpecs(m),
          qty: li.quantity,
          unit: li.unit || "",
          price: li.unit_price,
          total: li.total_price,
          tsDomIds: itemTermsheetIds(li).filter((tid) => q.termsheets.some((t) => t.id === tid)),
          acceptedTsId: li.accepted_ts_id,
          rejected: !!li.rejected,
          restore: true,
        };
      }),
    );
    setTsCards(
      q.termsheets.map((t) => ({
        key: t.id,
        domId: t.id,
        milestones: t.milestones.map((m) => ({ ...m })),
      })),
    );
    setQuoteDate(q.quote_date || null);
    setExpiryDate(q.expiry_date || null);
    setAcceptedDate(q.accepted_date || null);
    setArrivedDate(q.arrived_date || null);
    setStatus(q.status);
    setReady(true);
  }, [q, suppliers, materials]);

  useEffect(() => {
    if (!quoteId) return;
    let alive = true;
    void api.files
      .list(quoteId, "invoice")
      .then((list) => alive && setInvoices(list))
      .catch(() => alive && setInvoices([]));
    void api.files
      .list(quoteId, "proforma")
      .then((list) => alive && setProformas(list))
      .catch(() => alive && setProformas([]));
    return () => {
      alive = false;
    };
  }, [quoteId]);

  const itemOptions = useMemo(() => {
    return itemRows
      .filter((r) => !r.rejected || r.restore)
      .map((r, idx) => ({
        tempId: r.key,
        label: `${faNum(idx + 1)}. ${r.cat || "قلم جدید"}${r.brand ? ` • ${r.brand}` : ""}`,
      }));
  }, [itemRows]);

  const getCoveredIds = (card: EditTsCard) => {
    const cardId = card.domId || card.key;
    const explicit = itemRows
      .filter((r) => (!r.rejected || r.restore) && r.tsDomIds.includes(cardId))
      .map((r) => r.key);

    if (!explicit.length && tsCards[0]?.key === card.key) {
      return itemRows.filter((r) => !r.rejected || r.restore).map((r) => r.key);
    }
    return explicit;
  };

  const handleCoverageChange = (cardKey: string, newCoveredKeys: string[]) => {
    const card = tsCards.find((c) => c.key === cardKey);
    const cardId = card?.domId || cardKey;
    setItemRows((rows) =>
      rows.map((row) => {
        const shouldHave = newCoveredKeys.includes(row.key);
        const exists = row.tsDomIds.includes(cardId);
        if (shouldHave === exists) return row;
        const nextTsDomIds = shouldHave
          ? [...row.tsDomIds, cardId]
          : row.tsDomIds.filter((id) => id !== cardId);
        return { ...row, tsDomIds: nextTsDomIds };
      }),
    );
  };

  if (!q || !ready) return null;

  const patchItem = (key: string, patch: Partial<EditItemRow>) => {
    setItemRows((rows) => rows.map((r) => (r.key === key ? { ...r, ...patch } : r)));
  };

  const addItemRow = () => {
    const newKey = "new-" + Math.random().toString(36).slice(2, 9);
    const defaultTsId = tsCards[0] ? tsCards[0].domId || tsCards[0].key : "";
    setItemRows((rows) => [
      ...rows,
      {
        key: newKey,
        cat: "",
        brand: "",
        specs: [],
        qty: null,
        unit: "",
        price: null,
        total: null,
        tsDomIds: defaultTsId ? [defaultTsId] : [],
        acceptedTsId: null,
        rejected: false,
        restore: true,
      },
    ]);
  };

  const updateTs = (key: string, patch: Partial<EditTsCard>) => {
    setTsCards((cards) => cards.map((c) => (c.key === key ? { ...c, ...patch } : c)));
  };

  const addTsCard = () => {
    setTsCards((cards) => [
      ...cards,
      {
        key: "new-ts-" + Date.now() + Math.random().toString(36).slice(2, 6),
        domId: "",
        milestones: [{ when_iso: null, amount: null }],
      },
    ]);
  };

  const removeTsCard = (key: string) => {
    if (tsCards.length <= 1) {
      toast.error("حداقل یک روش شرایط پرداخت باید وجود داشته باشد.");
      return;
    }
    setTsCards((cards) => cards.filter((c) => c.key !== key));
    const card = tsCards.find((c) => c.key === key);
    const cardId = card?.domId || key;
    setItemRows((rows) =>
      rows.map((r) => ({
        ...r,
        tsDomIds: r.tsDomIds.filter((id) => id !== cardId && id !== key),
      })),
    );
  };

  const confirm = async () => {
    if (hasReceipts && status !== q.status) {
      toast.error("این پیشنهاد به‌دلیل ثبت رسید در انبار، غیرقابل ویرایش یا بازگشت است.");
      return;
    }

    const next: Quote = JSON.parse(JSON.stringify(q));

    if (supplierName.trim()) {
      const norm = normalize(supplierName);
      const exist = suppliers.find((s) => normalize(s.name) === norm);
      if (exist) {
        next.supplier_id = exist.id;
      } else {
        const newSup = { id: nextId("s", suppliers), name: supplierName.trim(), location: "", phone: "", contact: "", topic: "", categories: [] };
        const created = await addSupplier.mutateAsync(newSup);
        next.supplier_id = created.id;
      }
    }

    next.project = selectedProjects[0] || "";
    next.projects = [...selectedProjects];
    next.notes = notes.trim();
    next.invoices = invoices;
    next.proformas = proformas;

    const tsIdMap: Record<string, string> = {};
    const newTermsheets: Termsheet[] = [];
    tsCards.forEach((card, i) => {
      const domId = card.domId || "new-ts-" + i;
      const realId =
        domId && !domId.startsWith("new-ts-")
          ? domId
          : nextDashedId("ts", newTermsheets.length ? newTermsheets : next.termsheets);
      tsIdMap[domId] = realId;
      tsIdMap[card.key] = realId;
      const orig = next.termsheets.find((t) => t.id === realId);
      const label = orig?.label || `گزینه ${faNum(i + 1)}`;
      const st = orig?.status || "offered";
      newTermsheets.push({ id: realId, label, milestones: card.milestones, status: st });
    });
    next.termsheets = newTermsheets;

    const newItems: LineItem[] = [];
    const materialsCopy = [...materials];
    for (const row of itemRows) {
      const cat = row.cat.trim();
      const brand = row.brand.trim();
      const specs = row.specs;
      const unit = row.unit.trim();
      const qty = row.qty;
      const price = row.price;
      const total = row.total;
      if (!cat && !brand && qty == null && price == null) continue;

      let material = matchMaterial(materialsCopy, cat, brand, specs);
      let materialId: string;
      if (material) {
        materialId = material.id;
      } else {
        const nm = {
          id: nextId("m", materialsCopy),
          name: (cat || brand || specs.join(" ") || "").trim() || "کالای جدید",
          topic: materialById(materials, row.origLi?.material_id || "").topic || "",
          brand,
          specs,
          base_unit: unit,
        };
        materialsCopy.push(nm);
        const created = await addMaterial.mutateAsync(nm);
        materialId = created.id;
      }

      const wasRejected = row.rejected;
      const rejected = wasRejected && !row.restore;

      const termsheet_ids: string[] = [];
      let acceptedTsId = row.acceptedTsId;
      if (!rejected) {
        row.tsDomIds.forEach((domId) => {
          const realId = tsIdMap[domId] || domId;
          if (realId && !termsheet_ids.includes(realId)) termsheet_ids.push(realId);
        });
        if (!termsheet_ids.length && next.termsheets.length) {
          termsheet_ids.push(next.termsheets[0].id);
        }
        if (wasRejected) {
          const acc = next.termsheets.find((t) => t.status === "accepted");
          if (acc) {
            termsheet_ids.length = 0;
            termsheet_ids.push(acc.id);
          }
          acceptedTsId = acc ? acc.id : null;
        }
      } else {
        acceptedTsId = null;
      }

      newItems.push({
        id: "li-" + (newItems.length + 1),
        material_id: materialId,
        quantity: qty,
        unit,
        unit_price: price,
        total_price: total,
        termsheet_ids,
        accepted_ts_id: acceptedTsId,
        rejected,
        arrived_date: row.origLi?.arrived_date ?? null,
        projects: row.origLi?.projects ?? [],
        target_project: status === "offered" ? null : (row.origLi?.target_project ?? null),
        target_project_id: status === "offered" ? null : (row.origLi?.target_project_id ?? null),
      });
    }
    next.line_items = newItems.length ? newItems : next.line_items;

    const referencedTs = new Set<string>();
    next.line_items.forEach((li) => (li.termsheet_ids || []).forEach((tid) => referencedTs.add(tid)));
    next.termsheets = next.termsheets.filter((t, idx) => referencedTs.has(t.id) || idx === 0);
    next.line_items.forEach((li) => {
      if (li.accepted_ts_id && !next.termsheets.some((t) => t.id === li.accepted_ts_id)) {
        li.accepted_ts_id = null;
      }
    });

    next.quote_date = quoteDate || q.quote_date;
    next.expiry_date = expiryDate ? (expiryDate.length > 10 ? expiryDate.slice(0, 10) : expiryDate) : "";
    next.accepted_date = acceptedDate;
    next.arrived_date = arrivedDate;
    next.status = status as Quote["status"];

    if (next.status === "offered") {
      next.accepted_date = null;
      next.arrived_date = null;
      next.termsheets.forEach((t) => {
        t.status = "offered";
      });
      next.line_items.forEach((li) => {
        li.rejected = false;
        li.arrived_date = null;
        li.accepted_ts_id = null;
        li.target_project = null;
        li.target_project_id = null;
        li.allocations = undefined;
      });

      // ادغام سطرهای تفکیک‌شده حاصل از تخصیص چندپروژه‌ای (الزام ۲)
      const mergedMap = new Map<string, LineItem>();
      for (const li of next.line_items) {
        const key = `${li.material_id}__${li.unit || ""}__${li.unit_price ?? ""}`;
        const existing = mergedMap.get(key);
        if (existing) {
          const q1 = Number(existing.quantity ?? 0);
          const q2 = Number(li.quantity ?? 0);
          existing.quantity = Math.round((q1 + q2) * 10000) / 10000;
          if (existing.unit_price != null && existing.quantity != null) {
            existing.total_price = existing.unit_price * existing.quantity;
          }
        } else {
          mergedMap.set(key, { ...li });
        }
      }
      next.line_items = Array.from(mergedMap.values());
    } else if (next.status === "accepted") {
      next.arrived_date = null;
      next.line_items.forEach((li) => {
        li.arrived_date = null;
      });
    }

    try {
      await updateQuote.mutateAsync({ id: q.id, patch: next });
    } catch (err) {
      toast.error(err instanceof Error ? err.message : "ذخیره‌ی تغییرات ناموفق بود");
      return;
    }
    setReady(false);
    onClose();
  };

  return (
    <>
      <Dialog open={!!quoteId} onOpenChange={(o) => !o && onClose()}>
        <DialogContent className="flex h-[88vh] max-h-[850px] w-[95vw] max-w-3xl flex-col p-0 overflow-hidden rounded-2xl border border-gray-200 bg-white text-gray-900 shadow-2xl">
          {/* هدر */}
          <DialogHeader className="border-b border-gray-100 bg-white px-4 py-3 sm:px-6 sm:py-4 shrink-0 text-right">
            <DialogTitle className="text-base font-bold text-gray-900 sm:text-lg">ویرایش پیشنهاد خرید</DialogTitle>
            <div className="text-[12px] text-gray-500 truncate mt-0.5">
              {supplierName ? `تأمین‌کننده: ${supplierName}` : "تنظیم اقلام، مبالغ و شرایط پرداخت"}
            </div>
          </DialogHeader>

          {hasReceipts && (
            <div className="flex items-center gap-2 border-b border-amber-200 bg-amber-50 px-4 py-2 text-[11.5px] font-medium text-amber-800 shrink-0">
              <AlertCircle className="h-4 w-4 shrink-0 text-amber-600" />
              <span>این پیشنهاد به‌دلیل ثبت رسید در انبار، غیرقابل ویرایش یا بازگشت است.</span>
            </div>
          )}

          {/* تب‌بار */}
          <div className="flex items-center border-b border-gray-100 bg-gray-50/70 px-3 py-2 sm:px-6 gap-2 shrink-0">
            <button
              type="button"
              onClick={() => setActiveTab("items")}
              className={cn(
                "flex items-center gap-1.5 rounded-lg px-3.5 py-1.5 text-xs font-semibold transition-all",
                activeTab === "items"
                  ? "bg-white text-blue-600 shadow-xs border border-gray-200"
                  : "text-gray-600 hover:text-gray-900 hover:bg-white/60",
              )}
            >
              <Package className="h-3.5 w-3.5" />
              <span>اقلام و سفارش</span>
              <span
                className={cn(
                  "rounded-full px-1.5 py-0.2 text-[10.5px] font-mono",
                  activeTab === "items" ? "bg-blue-50 text-blue-600" : "bg-gray-200/70 text-gray-600",
                )}
              >
                {faNum(itemRows.length)}
              </span>
            </button>

            <button
              type="button"
              onClick={() => setActiveTab("terms")}
              className={cn(
                "flex items-center gap-1.5 rounded-lg px-3.5 py-1.5 text-xs font-semibold transition-all",
                activeTab === "terms"
                  ? "bg-white text-blue-600 shadow-xs border border-gray-200"
                  : "text-gray-600 hover:text-gray-900 hover:bg-white/60",
              )}
            >
              <CreditCard className="h-3.5 w-3.5" />
              <span>شرایط پرداخت</span>
              <span
                className={cn(
                  "rounded-full px-1.5 py-0.2 text-[10.5px] font-mono",
                  activeTab === "terms" ? "bg-blue-50 text-blue-600" : "bg-gray-200/70 text-gray-600",
                )}
              >
                {faNum(tsCards.length)}
              </span>
            </button>

            <button
              type="button"
              onClick={() => setActiveTab("dates")}
              className={cn(
                "flex items-center gap-1.5 rounded-lg px-3.5 py-1.5 text-xs font-semibold transition-all",
                activeTab === "dates"
                  ? "bg-white text-blue-600 shadow-xs border border-gray-200"
                  : "text-gray-600 hover:text-gray-900 hover:bg-white/60",
              )}
            >
              <Calendar className="h-3.5 w-3.5" />
              <span>وضعیت و اسناد</span>
              {invoices.length > 0 && (
                <span
                  className={cn(
                    "rounded-full px-1.5 py-0.2 text-[10.5px] font-mono",
                    activeTab === "dates" ? "bg-blue-50 text-blue-600" : "bg-gray-200/70 text-gray-600",
                  )}
                >
                  {faNum(invoices.length)}
                </span>
              )}
            </button>
          </div>

          {/* محتوا */}
          <div className="flex-1 overflow-y-auto p-3.5 sm:p-5 space-y-4 bg-white text-gray-800">
            {/* تب ۱: اقلام */}
            {activeTab === "items" && (
              <div className="space-y-4">
                <div className="rounded-xl border border-gray-200 bg-gray-50/50 p-3.5 sm:p-4 space-y-3">
                  <div className="grid grid-cols-1 gap-3 sm:grid-cols-2">
                    <div className="flex min-w-0 flex-col gap-1">
                      <label className="text-xs font-semibold text-gray-600">تأمین‌کننده</label>
                      <Combobox
                        value={supplierName}
                        onChange={(it: { id: string; label: string }) => setSupplierName(it.label)}
                        items={suppliers.map((s) => ({ id: s.id, name: s.name }))}
                        allowAdd
                        addSuffix="به عنوان تأمین‌کنندهٔ جدید"
                        placeholder="نام تأمین‌کننده"
                        onInputChange={(v) => setSupplierName(v)}
                      />
                    </div>

                    <div className="flex min-w-0 flex-col gap-1">
                      <label className="text-xs font-semibold text-gray-600">پروژه</label>
                      <MultiSelectCombobox
                        values={selectedProjects}
                        onChange={setSelectedProjects}
                        options={projectOptions}
                        placeholder="انتخاب پروژه..."
                      />
                    </div>
                  </div>

                  <div className="flex min-w-0 flex-col gap-1">
                    <label className="text-xs font-semibold text-gray-600">یادداشت</label>
                    <textarea
                      rows={2}
                      className="w-full rounded-lg border border-gray-200 bg-white px-3 py-2 text-xs sm:text-sm text-gray-800 shadow-xs focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-blue-500/30"
                      value={notes}
                      placeholder="یادداشت‌های داخلی این معامله..."
                      onChange={(e) => setNotes(e.target.value)}
                    />
                  </div>
                </div>

                {/* لیست اقلام — چیدمان ۵ سطری هماهنگ با ویزارد */}
                <div className="space-y-3">
                  <div className="flex items-center justify-between">
                    <span className="text-xs font-bold text-gray-800">اقلام سفارش ({faNum(itemRows.length)})</span>
                  </div>

                  {itemRows.map((row, idx) => (
                    <div
                      key={row.key}
                      className={cn(
                        "rounded-xl border p-3.5 sm:p-4 transition-all bg-white",
                        row.rejected ? "border-dashed border-gray-300 opacity-60 bg-gray-50/40" : "border-gray-200 shadow-xs",
                      )}
                    >
                      <div className="flex items-center justify-between pb-2 mb-3 border-b border-gray-100">
                        <div className="flex items-center gap-1.5 min-w-0">
                          <span className="flex h-5 w-5 shrink-0 items-center justify-center rounded-full bg-blue-50 text-[11px] font-bold text-blue-600">
                            {faNum(idx + 1)}
                          </span>
                          <span className="text-xs font-bold text-gray-900 truncate">
                            {row.cat || "قلم جدید"} {row.brand ? `• ${row.brand}` : ""}
                          </span>
                        </div>
                        {!hasReceipts && (
                          <button
                            type="button"
                            className="inline-flex items-center gap-1 rounded-md px-2 py-0.5 text-xs text-red-600 hover:bg-red-50 transition-colors"
                            title="حذف قلم"
                            onClick={() => setItemRows((rows) => rows.filter((r) => r.key !== row.key))}
                          >
                            <Trash2 className="h-3.5 w-3.5" />
                            <span className="text-[11px]">حذف</span>
                          </button>
                        )}
                      </div>

                      <div className="space-y-3">
                        {/* ردیف ۱: متریال و برند */}
                        <div className="grid grid-cols-2 gap-2.5">
                          <div className="flex flex-col gap-1 min-w-0">
                            <label className="text-[11px] font-semibold text-gray-600 text-right">متریال</label>
                            <input
                              disabled={hasReceipts}
                              className="h-9 w-full rounded-md border border-gray-200 bg-white px-2.5 text-xs text-gray-800 text-right focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-blue-500/30 disabled:cursor-not-allowed disabled:bg-gray-50 disabled:opacity-60"
                              placeholder="نام متریال"
                              value={row.cat}
                              onChange={(e) => patchItem(row.key, { cat: e.target.value })}
                            />
                          </div>

                          <div className="flex flex-col gap-1 min-w-0">
                            <label className="text-[11px] font-semibold text-gray-600 text-right">برند</label>
                            <input
                              disabled={hasReceipts}
                              className="h-9 w-full rounded-md border border-gray-200 bg-white px-2.5 text-xs text-gray-800 text-right focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-blue-500/30 disabled:cursor-not-allowed disabled:bg-gray-50 disabled:opacity-60"
                              placeholder="برند"
                              value={row.brand}
                              onChange={(e) => patchItem(row.key, { brand: e.target.value })}
                            />
                          </div>
                        </div>

                        {/* ردیف ۲: مشخصه فنی (تمام‌عرض با فضای کافی برای تگ‌ها) */}
                        <div className="flex flex-col gap-1 min-w-0">
                          <label className="text-[11px] font-semibold text-gray-600 text-right">مشخصه فنی / ابعاد</label>
                          <MultiSelectCombobox
                            disabled={hasReceipts}
                            values={row.specs}
                            onChange={(specs) => patchItem(row.key, { specs })}
                            options={specOptions}
                            placeholder="انتخاب مشخصات..."
                            className="min-w-0"
                          />
                        </div>

                        {/* بخش مقادیر و محاسبات مالی */}
                        <div className="rounded-lg bg-gray-50/70 p-2.5 border border-gray-200 space-y-3">
                          {/* ردیف ۳: تعداد + واحد سنجش */}
                          <div className="grid grid-cols-[100px_1fr] sm:grid-cols-[120px_1fr] gap-2.5">
                            <div className="flex flex-col gap-1 min-w-0">
                              <label className="text-[10.5px] font-semibold text-gray-600 text-right">تعداد</label>
                              <NumberInput
                                disabled={hasReceipts}
                                value={row.qty}
                                onChange={(qty) => {
                                  patchItem(row.key, {
                                    qty,
                                    total: qty != null && row.price != null ? Math.round(qty * row.price) : row.total,
                                  });
                                }}
                                placeholder="مقدار"
                                className="!text-right text-right"
                              />
                            </div>

                            <div className="flex flex-col gap-1 min-w-0">
                              <label className="text-[10.5px] font-semibold text-gray-600 text-right">واحد سنجش</label>
                              <input
                                disabled={hasReceipts}
                                className="h-9 w-full rounded-md border border-gray-200 bg-white px-2.5 text-xs text-gray-800 text-right focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-blue-500/30 disabled:cursor-not-allowed disabled:bg-gray-50 disabled:opacity-60"
                                placeholder="واحد (شاخه، متر، کیلو...)"
                                value={row.unit}
                                onChange={(e) => patchItem(row.key, { unit: e.target.value })}
                              />
                            </div>
                          </div>

                          {/* ردیف ۴: قیمت هر واحد (تمام‌عرض با نمایش حروف) */}
                          <div className="flex flex-col gap-1 min-w-0 border-t border-gray-200/80 pt-2.5">
                            <label className="text-[10.5px] font-semibold text-gray-600 text-right">
                              {row.unit ? `قیمت هر ${row.unit} (تومان)` : "قیمت هر واحد (تومان)"}
                            </label>
                            <NumberInput
                              disabled={hasReceipts}
                              value={row.price}
                              onChange={(price) => {
                                patchItem(row.key, {
                                  price,
                                  total: row.qty != null && price != null ? Math.round(row.qty * price) : row.total,
                                });
                              }}
                              placeholder="قیمت هر واحد"
                              showWords
                              maxDecimals={2}
                              className="!text-right text-right"
                            />
                          </div>

                          {/* ردیف ۵: قیمت کل این قلم (تمام‌عرض با نمایش حروف) */}
                          <div className="flex flex-col gap-1 min-w-0 border-t border-gray-200/80 pt-2.5">
                            <label className="text-[10.5px] font-semibold text-gray-600 text-right">قیمت کل این قلم (تومان)</label>
                            <NumberInput
                              disabled={hasReceipts}
                              value={row.total}
                              onChange={(t) => {
                                patchItem(row.key, {
                                  total: t,
                                  price:
                                    t != null && row.qty != null && row.qty > 0 ? Math.round((t / row.qty) * 100) / 100 : row.price,
                                });
                              }}
                              placeholder="قیمت کل قلم"
                              showWords
                              className="!text-right text-right"
                            />
                          </div>
                        </div>

                        {row.rejected && (
                          <div className="pt-2 border-t border-gray-100">
                            <label className="inline-flex items-center gap-1.5 text-xs font-semibold text-blue-600 cursor-pointer">
                              <input
                                type="checkbox"
                                className="accent-blue-600 h-4 w-4 rounded"
                                checked={row.restore}
                                onChange={(e) => patchItem(row.key, { restore: e.target.checked })}
                              />
                              بازگرداندن این قلم به معامله
                            </label>
                          </div>
                        )}
                      </div>
                    </div>
                  ))}

                  {!hasReceipts && (
                    <Button
                      type="button"
                      variant="line"
                      size="sm"
                      className="w-full border-dashed border-gray-300 py-2 text-xs font-medium text-gray-700 gap-1 hover:border-blue-500 hover:text-blue-600 hover:bg-blue-50/50"
                      onClick={addItemRow}
                    >
                      <Plus className="h-3.5 w-3.5" />
                      <span>افزودن قلم جدید</span>
                    </Button>
                  )}
                </div>
              </div>
            )}

            {/* تب ۲: شرایط پرداخت با قالب TermsheetCard ویزارد */}
            {activeTab === "terms" && (
              <div className="space-y-3.5">
                <div className="flex items-center justify-between">
                  <div>
                    <div className="text-xs font-bold text-gray-800">گزینه‌های شرایط پرداخت</div>
                    <div className="text-[11.5px] text-gray-500 mt-0.5">
                      روش‌های پرداخت و اقلام تحت پوشش هر کدام را در کارت خودش مشخص کنید.
                    </div>
                  </div>
                  {!hasReceipts && (
                    <Button
                      type="button"
                      variant="line"
                      size="sm"
                      className="gap-1 text-xs text-gray-700"
                      onClick={addTsCard}
                    >
                      <Plus className="h-3.5 w-3.5" />
                      <span>افزودن گزینه جدید</span>
                    </Button>
                  )}
                </div>

                <div className="flex flex-col gap-3">
                  {tsCards.map((card, idx) => (
                    <TermsheetCard
                      key={card.key}
                      index={idx + 1}
                      milestones={card.milestones}
                      onMilestonesChange={(ms) => updateTs(card.key, { milestones: ms })}
                      items={itemOptions}
                      coveredIds={getCoveredIds(card)}
                      onCoverageChange={(ids) => handleCoverageChange(card.key, ids)}
                      onRemove={() => removeTsCard(card.key)}
                    />
                  ))}
                </div>
              </div>
            )}

            {/* تب ۳: وضعیت و اسناد */}
            {activeTab === "dates" && (
              <div className="space-y-3.5">
                <div className="rounded-xl border border-gray-200 bg-white p-3.5 sm:p-4 space-y-2 shadow-xs">
                  <label className="text-xs font-bold text-gray-900 block">وضعیت فعلی پیشنهاد</label>
                  <select
                    className="h-9 w-full rounded-lg border border-gray-200 bg-white px-3 text-xs sm:text-sm text-gray-800 focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-blue-500/30 disabled:cursor-not-allowed disabled:bg-gray-50 disabled:opacity-60"
                    value={status}
                    disabled={hasReceipts}
                    onChange={(e) => setStatus(e.target.value)}
                  >
                    {statusOptionsFor(q.status).map((st) => (
                      <option key={st} value={st}>
                        {STATUS_LABEL[st]}
                      </option>
                    ))}
                  </select>
                  <div className="text-[11px] text-gray-500">
                    * تغییر وضعیت برای عقب بردن مرحله معامله کاربرد دارد.
                  </div>
                </div>

                <div className="rounded-xl border border-gray-200 bg-white p-3.5 sm:p-4 space-y-2.5 shadow-xs">
                  <div className="text-xs font-bold text-gray-900">تاریخ‌های چرخه خرید</div>
                  <div className="grid grid-cols-1 gap-2.5 sm:grid-cols-2">
                    <div className="flex flex-col gap-1">
                      <label className="text-xs font-semibold text-gray-600">تاریخ پیشنهاد</label>
                      <JalaliDatePicker value={quoteDate} onChange={setQuoteDate} placeholder="تاریخ" withTime />
                    </div>
                    <div className="flex flex-col gap-1">
                      <label className="text-xs font-semibold text-gray-600">تاریخ انقضا</label>
                      <JalaliDatePicker value={expiryDate} onChange={setExpiryDate} placeholder="تاریخ" />
                    </div>
                    <div className="flex flex-col gap-1">
                      <label className="text-xs font-semibold text-gray-600">تاریخ پذیرش</label>
                      <JalaliDatePicker value={acceptedDate} onChange={setAcceptedDate} placeholder="تاریخ" withTime />
                    </div>
                    <div className="flex flex-col gap-1">
                      <label className="text-xs font-semibold text-gray-600">تاریخ رسید</label>
                      <JalaliDatePicker value={arrivedDate} onChange={setArrivedDate} placeholder="تاریخ" withTime />
                    </div>
                  </div>
                </div>

                <div className="rounded-xl border border-gray-200 bg-white p-3.5 sm:p-4 space-y-2 shadow-xs">
                  <div className="text-xs font-bold text-gray-900">فاکتورهای اصلی و پیوست‌ها</div>
                  <FileList
                    files={invoices}
                    onChange={setInvoices}
                    upload={(f) => api.files.upload(q.id, "invoice", f)}
                    onDelete={(a) =>
                      a.id &&
                      void api.files.remove(q.id, "invoice", a.id).catch((err) =>
                        toast.error(err instanceof Error ? err.message : "حذف فاکتور ناموفق بود"),
                      )
                    }
                    onDownload={(a) => api.files.download(q.id, "invoice", a.id!, a.name)}
                    loadPreview={(a) => api.files.previewUrl(q.id, "invoice", a.id!)}
                  />
                </div>

                {/* پیش‌فاکتورها — در همه‌ی مراحل چرخه‌ی پیشنهاد قابل افزودن/ویرایش است */}
                <div className="rounded-xl border border-gray-200 bg-white p-3.5 sm:p-4 space-y-2 shadow-xs">
                  <div className="text-xs font-bold text-gray-900">پیش‌فاکتورها</div>
                  <FileList
                    files={proformas}
                    onChange={setProformas}
                    upload={(f) => api.files.upload(q.id, "proforma", f)}
                    onDelete={(a) =>
                      a.id &&
                      void api.files.remove(q.id, "proforma", a.id).catch((err) =>
                        toast.error(err instanceof Error ? err.message : "حذف پیش‌فاکتور ناموفق بود"),
                      )
                    }
                    onDownload={(a) => api.files.download(q.id, "proforma", a.id!, a.name)}
                    loadPreview={(a) => api.files.previewUrl(q.id, "proforma", a.id!)}
                    label="افزودن پیش‌فاکتور"
                  />
                </div>
              </div>
            )}
          </div>

          {/* فوتر */}
          <DialogFooter className="border-t border-gray-200 bg-white px-4 py-2.5 sm:px-6 sm:py-3 shrink-0 flex flex-row items-center justify-between gap-2">
            {q.status === "offered" ? (
              <Button
                type="button"
                variant="danger"
                size="sm"
                onClick={() => setShowDeleteConfirm(true)}
                className="gap-1 px-2.5 sm:px-3 text-xs shrink-0"
              >
                <Trash2 className="h-3.5 w-3.5" />
                <span className="hidden sm:inline">حذف</span>
              </Button>
            ) : (
              <div />
            )}

            <div className="flex items-center gap-2">
              <Button variant="slate" size="sm" onClick={onClose} className="px-3.5 text-xs">
                انصراف
              </Button>
              <Button size="sm" onClick={() => void confirm()} className="px-4 text-xs">
                ذخیره تغییرات
              </Button>
            </div>
          </DialogFooter>
        </DialogContent>
      </Dialog>

      {/* مودال تایید حذف */}
      <Dialog open={showDeleteConfirm} onOpenChange={(open) => !deleting && setShowDeleteConfirm(open)}>
        <DialogContent className="z-[60] max-w-md p-4 sm:p-6 bg-white border border-gray-200 text-gray-900">
          <DialogHeader>
            <DialogTitle className="text-gray-900">حذف پیشنهاد خرید</DialogTitle>
          </DialogHeader>
          <div className="py-2 text-xs sm:text-sm text-gray-600">
            آیا از حذف کامل این پیشنهاد اطمینان دارید؟ این عملیات غیرقابل بازگشت است.
          </div>
          <DialogFooter className="flex items-center justify-end gap-2 pt-2">
            <Button
              type="button"
              variant="slate"
              size="sm"
              onClick={() => setShowDeleteConfirm(false)}
              disabled={deleting}
            >
              انصراف
            </Button>
            <Button
              type="button"
              variant="danger"
              size="sm"
              onClick={() => void handleDelete()}
              disabled={deleting}
            >
              {deleting ? "در حال حذف..." : "حذف نهایی"}
            </Button>
          </DialogFooter>
        </DialogContent>
      </Dialog>
    </>
  );
}