import { useEffect, useMemo, useState } from "react";
import { toast } from "sonner";
import type { Attachment, Milestone, Quote } from "../../lib/types";
import { api, nextDashedId } from "../../lib/api";
import { useMaterials, useProjects, useQuotes, useUpdateQuote, useSuppliers } from "../../hooks";
import {
  activeItems,
  formatMaterialTitle,
  itemTermsheetIds,
  materialById,
  supplierById,
} from "../../lib/quoteUtils";
import { faNum, fmtNum } from "../../lib/formatters";
import { groupCommas } from "../../lib/numutil";
import { Button } from "../../components/ui/button";
import {
  Dialog,
  DialogContent,
  DialogFooter,
  DialogHeader,
  DialogTitle,
} from "../../components/ui/dialog";
import { MilestoneRow } from "../../components/MilestoneRow";
import { FileList } from "../../components/FileList";
import { JalaliDatePicker } from "../../components/JalaliDatePicker";
import { Building2, Plus, Trash2, CheckCircle2, AlertCircle } from "lucide-react";

// تبدیل عدد به حروف فارسی جهت نمایش زیر باکس مقدار
const ONES = ["", "یک", "دو", "سه", "چهار", "پنج", "شش", "هفت", "هشت", "نه"];
const TEENS = [
  "ده",
  "یازده",
  "دوازده",
  "سیزده",
  "چهارده",
  "پانزده",
  "شانزده",
  "هفده",
  "هجده",
  "نوزده",
];
const TENS = [
  "",
  "",
  "بیست",
  "سی",
  "چهل",
  "پنجاه",
  "شصت",
  "هفتاد",
  "هشتاد",
  "نود",
];
const HUNDREDS = [
  "",
  "صد",
  "دویست",
  "سیصد",
  "چهارصد",
  "پانصد",
  "ششصد",
  "هفتصد",
  "هشتصد",
  "نهصد",
];
const SCALES = ["", "هزار", "میلیون", "میلیارد", "تریلیون"];
const DECIMAL_SCALES: Record<number, string> = {
  1: "دهم",
  2: "صدم",
  3: "هزارم",
  4: "ده‌هزارم",
};

function convertThreeDigits(n: number): string {
  if (n === 0) return "";
  const parts: string[] = [];
  const h = Math.floor(n / 100);
  const rem = n % 100;
  if (h > 0) parts.push(HUNDREDS[h]);
  if (rem >= 10 && rem <= 19) {
    parts.push(TEENS[rem - 10]);
  } else {
    const t = Math.floor(rem / 10);
    const u = rem % 10;
    if (t > 0) parts.push(TENS[t]);
    if (u > 0) parts.push(ONES[u]);
  }
  return parts.join(" و ");
}

function toEnglishDigits(str: string): string {
  return str
    .replace(/[۰-۹]/g, (d) => String(d.charCodeAt(0) - 1776))
    .replace(/[٠-٩]/g, (d) => String(d.charCodeAt(0) - 1632));
}

function numberToPersianWords(val: number | string | null | undefined): string {
  if (val == null || val === "") return "";
  const numStr = toEnglishDigits(String(val).trim());
  const num = parseFloat(numStr);
  if (isNaN(num)) return "";
  if (num === 0) return "صفر";

  const isNeg = num < 0;
  const parts = Math.abs(num).toString().split(".");
  const intStr = parts[0];
  const decStr = parts[1];

  let intNum = parseInt(intStr, 10);
  let intResult = "";

  if (intNum === 0) {
    intResult = "صفر";
  } else {
    const chunks: number[] = [];
    while (intNum > 0) {
      chunks.push(intNum % 1000);
      intNum = Math.floor(intNum / 1000);
    }
    const chunkWords: string[] = [];
    for (let i = chunks.length - 1; i >= 0; i--) {
      const c = chunks[i];
      if (c > 0) {
        const w = convertThreeDigits(c);
        const s = SCALES[i];
        chunkWords.push(s ? `${w} ${s}` : w);
      }
    }
    intResult = chunkWords.join(" و ");
  }

  if (decStr && parseInt(decStr, 10) > 0) {
    const cleanDecStr = decStr.slice(0, 4);
    const decNum = parseInt(cleanDecStr, 10);
    const decWord = numberToPersianWords(decNum);
    const scale = DECIMAL_SCALES[cleanDecStr.length];
    if (scale) {
      if (intNum === 0) {
        return `${isNeg ? "منفی " : ""}${decWord} ${scale}`;
      }
      return `${isNeg ? "منفی " : ""}${intResult} و ${decWord} ${scale}`;
    }
    return `${isNeg ? "منفی " : ""}${intResult} ممیز ${decWord}`;
  }

  return isNeg ? `منفی ${intResult}` : intResult;
}

interface CardDraft {
  domId: string;
  isNew: boolean;
  milestones: Milestone[];
  label: string | null;
}

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

export function AcceptModal({ quoteId, onClose }: AcceptModalProps) {
  const quotes = useQuotes();
  const suppliers = useSuppliers();
  const materials = useMaterials();
  const projects = useProjects();
  const updateQuote = useUpdateQuote();

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

  const [cards, setCards] = useState<CardDraft[]>([]);
  const [invoices, setInvoices] = useState<Attachment[]>([]);
  const [proformas, setProformas] = useState<Attachment[]>([]);
  const [removedItems, setRemovedItems] = useState<Set<string>>(new Set());
  const [assignments, setAssignments] = useState<Record<string, string>>({});
  const [itemProjectsSel, setItemProjectsSel] = useState<Record<string, string>>({});
  const [itemAllocations, setItemAllocations] = useState<
    Record<string, { rowId: string; project_name: string; quantity: number | string }[]>
  >({});
  const [acceptDate, setAcceptDate] = useState<string | null>(() => new Date().toISOString());
  const [ready, setReady] = useState(false);

  useMemo(() => {
    if (!q) return;
    const offered = q.termsheets.filter((t) => t.status === "offered");
    setCards(
      offered.map((t) => ({ domId: t.id, isNew: false, milestones: JSON.parse(JSON.stringify(t.milestones)), label: t.label })),
    );
    const rem = new Set<string>();
    q.line_items.forEach((li) => {
      if (li.rejected) rem.add(li.id);
    });
    setRemovedItems(rem);
    setAssignments({});
    const projSel: Record<string, string> = {};
    const allocs: Record<string, { rowId: string; project_name: string; quantity: number | string }[]> = {};
    q.line_items.forEach((li) => {
      const names = (li.projects || []).map((p) => p.name).filter(Boolean);
      const defaultProj = li.target_project?.name
        ? li.target_project.name
        : names.length
          ? names[0]
          : q.projects && q.projects.length
            ? q.projects[0]
            : q.project || "";
      projSel[li.id] = defaultProj;
      if (li.allocations && li.allocations.length) {
        allocs[li.id] = li.allocations.map((a, idx) => ({
          rowId: `alloc-${li.id}-${idx}`,
          project_name: a.project_name,
          quantity: a.quantity,
        }));
      } else {
        allocs[li.id] = [
          {
            rowId: `alloc-${li.id}-0`,
            project_name: defaultProj,
            quantity: li.quantity ?? 1,
          },
        ];
      }
    });
    setItemProjectsSel(projSel);
    setItemAllocations(allocs);
    setReady(true);
  }, [q]);

  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]);

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

  const sup = supplierById(suppliers, q.supplier_id);
  const allItems = q.line_items || [];
  const active = activeItems(q);

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

  const cardLabel = (c: CardDraft, idx: number) => c.label || `گزینه ${faNum(idx + 1)}`;

  const updateCard = (domId: string, patch: Partial<CardDraft>) => {
    setCards((cs) => cs.map((c) => (c.domId === domId ? { ...c, ...patch } : c)));
  };

  const addNewCard = () => {
    setCards((cs) => [...cs, { domId: "new-ts-" + Date.now(), isNew: true, milestones: [{ when_iso: null, amount: null }], label: null }]);
  };

  const removeCard = (domId: string) => {
    setCards((cs) => cs.filter((c) => c.domId !== domId));
    setAssignments((a) => {
      const next: Record<string, string> = {};
      Object.entries(a).forEach(([liId, dom]) => {
        if (dom !== domId) next[liId] = dom;
      });
      return next;
    });
  };

  const assign = (liId: string, domId: string) => {
    setAssignments((a) => ({ ...a, [liId]: domId }));
  };

  const addAllocationRow = (liId: string, totalQty: number) => {
    setItemAllocations((prev) => {
      const currentList = prev[liId] || [];
      const currentSum = currentList.reduce((sum, a) => sum + (parseFloat(String(a.quantity)) || 0), 0);
      const remaining = Math.max(0, Math.round((totalQty - currentSum) * 10000) / 10000);
      const usedProjects = new Set(currentList.map((a) => a.project_name).filter(Boolean));
      const firstAvailable = projectOptions.find((p) => !usedProjects.has(p)) || "";
      const newRow = {
        rowId: `alloc-${liId}-${Date.now()}-${Math.random().toString(36).slice(2, 6)}`,
        project_name: firstAvailable,
        quantity: remaining > 0 ? remaining : "",
      };
      return { ...prev, [liId]: [...currentList, newRow] };
    });
  };

  const removeAllocationRow = (liId: string, rowId: string) => {
    setItemAllocations((prev) => {
      const currentList = prev[liId] || [];
      if (currentList.length <= 1) return prev;
      return { ...prev, [liId]: currentList.filter((a) => a.rowId !== rowId) };
    });
  };

  const updateAllocationRow = (
    liId: string,
    rowId: string,
    patch: Partial<{ project_name: string; quantity: number | string }>,
  ) => {
    setItemAllocations((prev) => {
      const currentList = prev[liId] || [];
      return {
        ...prev,
        [liId]: currentList.map((a) => (a.rowId === rowId ? { ...a, ...patch } : a)),
      };
    });
  };

  const confirm = () => {
    if (!q) return;

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

    const cardMeta = new Map<string, { milestones: Milestone[]; label: string; existing: Quote["termsheets"][number] | undefined }>();
    cards.forEach((c, idx) => {
      const milestones = c.milestones.filter((m) => m.when_iso || m.amount != null);
      if (!milestones.length) return;
      const existing = next.termsheets.find((t) => t.id === c.domId);
      cardMeta.set(c.domId, {
        milestones,
        label: c.label || `گزینه ${faNum(idx + 1)}`,
        existing,
      });
    });

    if (!cardMeta.size) {
      toast.error("حداقل یک شرایط پرداخت با حداقل یک مرحله پرداخت لازم است.");
      return;
    }

    next.line_items.forEach((li) => {
      if (removedItems.has(li.id)) li.rejected = true;
    });

    const active = activeItems(next);
    if (!active.length) {
      toast.error("همه‌ی قلم‌ها رد شده‌اند؛ حداقل یک قلم لازم است.");
      return;
    }

    const fallbackDom = [...cardMeta.keys()][0];
    const chosenDomIds = new Set<string>();
    active.forEach((li) => {
      const dom = assignments[li.id] || fallbackDom;
      if (dom && cardMeta.has(dom)) chosenDomIds.add(dom);
    });

    const domToFinal: Record<string, string> = {};
    chosenDomIds.forEach((dom) => {
      const meta = cardMeta.get(dom)!;
      if (meta.existing) {
        meta.existing.milestones = meta.milestones;
        meta.existing.status = "accepted";
        domToFinal[dom] = dom;
      } else {
        const newId = nextDashedId("ts", next.termsheets);
        next.termsheets.push({ id: newId, label: meta.label, milestones: meta.milestones, status: "accepted" });
        domToFinal[dom] = newId;
      }
    });

    active.forEach((li) => {
      const dom = assignments[li.id] || fallbackDom;
      const finalId = domToFinal[dom];
      const current = itemTermsheetIds(li).filter((tid) => next.termsheets.some((t) => t.id === tid));
      if (finalId && !current.includes(finalId)) current.push(finalId);
      li.termsheet_ids = current.length ? current : finalId ? [finalId] : current;
      li.accepted_ts_id = finalId || null;
    });

    const usedIds = new Set<string>();
    active.forEach((li) => {
      if (li.accepted_ts_id) usedIds.add(li.accepted_ts_id);
    });
    next.termsheets.forEach((t) => {
      if (t.status === "accepted" && !usedIds.has(t.id)) t.status = "offered";
    });

    for (const li of active) {
      const allocs = itemAllocations[li.id] || [];
      const m = materialById(materials, li.material_id);
      const title = formatMaterialTitle(m);
      const targetQty = Number(li.quantity ?? 0);

      if (!allocs.length) {
        toast.error(`برای قلم «${title}» حداقل یک ردیف تخصیص به پروژه لازم است.`);
        return;
      }

      for (const a of allocs) {
        if (!a.project_name.trim()) {
          toast.error(`برای قلم «${title}»، لطفاً پروژهٔ تمام ردیف‌های تخصیص را مشخص کنید.`);
          return;
        }
        const qVal = parseFloat(String(a.quantity));
        if (isNaN(qVal) || qVal <= 0) {
          toast.error(`برای قلم «${title}»، مقدار تخصیص باید عددی بزرگ‌تر از صفر باشد.`);
          return;
        }
      }

      const pNames = allocs.map((a) => a.project_name.trim());
      if (new Set(pNames).size !== pNames.length) {
        toast.error(`برای قلم «${title}»، پروژهٔ تکراری در ردیف‌های تخصیص انتخاب شده است.`);
        return;
      }

      const sumQty = allocs.reduce((sum, a) => sum + (parseFloat(String(a.quantity)) || 0), 0);
      const diff = Math.abs(sumQty - targetQty);
      if (diff > 0.0001) {
        toast.error(
          `مجموع مقادیر تخصیص‌یافته برای «${title}» (${fmtNum(sumQty)} ${li.unit}) با مقدار کل قلم (${fmtNum(targetQty)} ${li.unit}) برابر نیست.`
        );
        return;
      }
    }

    next.line_items.forEach((li) => {
      if (li.rejected) return;
      const allocs = itemAllocations[li.id];
      if (allocs && allocs.length) {
        li.allocations = allocs.map((a) => ({
          project_name: a.project_name.trim(),
          quantity: parseFloat(String(a.quantity)) || 0,
        }));
        li.target_project = { id: "", name: allocs[0].project_name.trim() };
      } else {
        const name = itemProjectsSel[li.id];
        if (name !== undefined) {
          li.target_project = name ? { id: "", name } : null;
        }
      }
    });

    const now = new Date().toISOString();
    next.accepted_date = acceptDate || now;
    next.status = "accepted";
    next.events.push({ type: "accepted", occurred_at: now });
    next.invoices = invoices;
    next.proformas = proformas;

    void updateQuote.mutateAsync({ id: q.id, patch: next });
    setReady(false);
    onClose();
  };

  return (
    <Dialog open={!!quoteId} onOpenChange={(o) => !o && onClose()}>
      <DialogContent className="max-w-3xl p-0 gap-0 overflow-hidden bg-slate-50 border-none shadow-2xl rounded-xl">
        <div className="flex flex-col max-h-[85vh] w-full">
          
          {/* هدر ثابت */}
          <div className="px-6 py-4 bg-white border-b border-line shrink-0 z-10 text-right">
            <DialogHeader className="p-0 text-right">
              <DialogTitle className="text-right text-lg font-bold text-slate-800">
                پذیرش پیشنهاد — {sup.name}
              </DialogTitle>
            </DialogHeader>
            <p className="text-[13px] text-muted mt-1 text-right">
              شرایط پرداخت را ویرایش کنید. سپس هر قلم را به بخش و پروژه دلخواه تخصیص دهید.
            </p>
          </div>

          {/* بدنه اسکرول‌پذیر */}
          <div className="flex-1 overflow-y-auto p-4 md:p-6 space-y-5">
            
            {/* بخش ۱: تنظیم شرایط پرداخت */}
            <section className="bg-white rounded-xl shadow-sm border border-line p-4 md:p-5">
              <h3 className="mb-4 text-[14px] font-bold text-slate-800">۱. تنظیم شرایط پرداخت</h3>
              <div className="flex flex-col gap-4">
                {cards.map((c, idx) => (
                  <div key={c.domId} className="modal-variant bg-slate-50/50 rounded-lg border border-line p-3">
                    <div className="modal-variant-head mb-2 flex items-center justify-between">
                      <span className="variant-num font-semibold text-primary">{cardLabel(c, idx)}</span>
                      <button type="button" className="text-red-500 hover:text-red-700 hover:bg-red-50 rounded-full w-6 h-6 flex items-center justify-center transition-colors" title="حذف" onClick={() => removeCard(c.domId)}>
                        ×
                      </button>
                    </div>
                    <div className="flex flex-col gap-2">
                      {c.milestones.map((m, i) => (
                        <MilestoneRow
                          key={i}
                          milestone={m}
                          onChange={(nextM) => {
                            const ms = [...c.milestones];
                            ms[i] = nextM;
                            updateCard(c.domId, { milestones: ms });
                          }}
                          onRemove={() => updateCard(c.domId, { milestones: c.milestones.filter((_, j) => j !== i) })}
                        />
                      ))}
                    </div>
                    <Button variant="ghost" size="sm" className="mt-3 text-xs text-primary bg-primary/5 hover:bg-primary/10" onClick={() => updateCard(c.domId, { milestones: [...c.milestones, { when_iso: null, amount: null }] })}>
                      ＋ مرحله پرداخت جدید
                    </Button>
                  </div>
                ))}
              </div>
              <Button variant="line" size="sm" className="mt-4 border-dashed border-primary/50 text-primary hover:bg-primary/5" onClick={addNewCard}>
                ＋ افزودن شرایط پرداخت جدید
              </Button>
            </section>

            {/* بخش ۲: تخصیص اقلام */}
            <section className="bg-white rounded-xl shadow-sm border border-line p-4 md:p-5">
              <h3 className="mb-1 text-[14px] font-bold text-slate-800">۲. تخصیص اقلام به شرایط پرداخت</h3>
              <div className="mb-4 text-[12px] text-muted">
                قلمی که می‌خرید را تیک بزنید؛ قلمی که نمی‌خرید را بدون تیک رها کنید تا از معامله حذف شود.
              </div>
              <div className="flex flex-col gap-2">
                {allItems.map((li) => {
                  const removed = removedItems.has(li.id);
                  const m = materialById(materials, li.material_id);
                  return (
                    <div 
                      key={li.id} 
                      className={`accept-item-assign-row flex flex-wrap sm:flex-nowrap items-center gap-3 p-3 rounded-lg border border-line transition-all ${removed ? "bg-slate-50 opacity-60 grayscale" : "bg-white hover:border-primary/30"}`}
                    >
                      <input
                        type="checkbox"
                        className="accent-primary w-4 h-4 rounded cursor-pointer shrink-0"
                        checked={!removed}
                        title="تیک = در معامله می‌ماند"
                        onChange={(e) => {
                          const next = new Set(removedItems);
                          if (e.target.checked) next.delete(li.id);
                          else next.add(li.id);
                          setRemovedItems(next);
                        }}
                      />
                      <div className="flex-1 min-w-[120px]">
                        <div className="text-[13.5px] font-medium text-slate-800">
                          {formatMaterialTitle(m)}
                        </div>
                        <div className="text-[12px] text-muted mt-0.5">
                          {fmtNum(li.quantity)} {li.unit} × {groupCommas(li.unit_price, true)}
                        </div>
                      </div>
                      
                      <select
                        className={`min-w-[160px] h-9 rounded-md border border-line bg-panel px-2.5 py-1.5 font-inherit text-[12px] outline-none transition-all ${!removed ? 'focus:border-primary focus:ring-1 focus:ring-primary' : 'cursor-not-allowed'}`}
                        value={assignments[li.id] || cards[0]?.domId || ""}
                        onChange={(e) => assign(li.id, e.target.value)}
                        disabled={removed}
                      >
                        {cards.map((c, idx) => (
                          <option key={c.domId} value={c.domId}>
                            {cardLabel(c, idx)}
                          </option>
                        ))}
                      </select>
                    </div>
                  );
                })}
                {active.length === 0 && (
                  <div className="mt-2 p-3 bg-red-50 text-red-600 rounded-md text-[13px] font-medium flex items-center gap-2">
                    <span>⚠️</span> همه‌ی قلم‌ها رد شده‌اند — حداقل یک قلم را تیک بزنید.
                  </div>
                )}
              </div>
            </section>

            {/* بخش ۳: تخصیص اقلام به پروژه‌ها */}
            <section className="bg-white rounded-xl shadow-sm border border-line p-4 md:p-5">
              <div className="flex items-center justify-between mb-1">
                <h3 className="text-[14px] font-bold text-slate-800">۳. تخصیص اقلام به پروژه‌ها</h3>
              </div>
              <div className="mb-4 text-[12px] text-muted">
                مشخص کنید چه مقداری از هر قلم به کدام پروژه اختصاص داده می‌شود. در صورت خرید یک کالا برای چند پروژه، می‌توانید آن را به چند سطر تفکیک کنید.
              </div>

              {projectOptions.length === 0 ? (
                <div className="text-[12px] text-amber-700 bg-amber-50 border border-amber-200 p-3 rounded-md text-center">
                  ⚠️ هیچ پروژه‌ای در سیستم ثبت نشده است. لطفاً ابتدا از بخش پروژه‌ها، حداقل یک پروژه ایجاد کنید.
                </div>
              ) : (
                <div className="flex flex-col gap-4">
                  {allItems
                    .filter((li) => !removedItems.has(li.id))
                    .map((li) => {
                      const m = materialById(materials, li.material_id);
                      const targetQty = Number(li.quantity ?? 0);
                      const allocs = itemAllocations[li.id] || [];
                      const allocSum = allocs.reduce(
                        (sum, a) => sum + (parseFloat(String(a.quantity)) || 0),
                        0
                      );
                      const diff = Math.round((targetQty - allocSum) * 10000) / 10000;
                      const isComplete = Math.abs(diff) < 0.0001;
                      const isOver = diff < -0.0001;

                      return (
                        <div
                          key={li.id}
                          className="rounded-xl border border-line bg-slate-50/50 p-4 transition-all hover:border-primary/30"
                        >
                          {/* هدر کارت قلم */}
                          <div className="flex flex-wrap items-center justify-between gap-2 mb-3 pb-2.5 border-b border-line/60">
                            <div className="flex items-center gap-2">
                              <Building2 className="w-4 h-4 text-primary shrink-0" />
                              <span className="text-[13.5px] font-bold text-slate-800">
                                {formatMaterialTitle(m)}
                              </span>
                            </div>

                            <div className="flex items-center gap-2">
                              <span className="text-[11px] font-medium text-slate-600 bg-white border border-line px-2.5 py-0.5 rounded-full">
                                کل: {fmtNum(targetQty)} {li.unit}
                              </span>

                              {isComplete ? (
                                <span className="inline-flex items-center gap-1 text-[11px] font-semibold text-emerald-700 bg-emerald-50 border border-emerald-200 px-2.5 py-0.5 rounded-full">
                                  <CheckCircle2 className="w-3 h-3" />
                                  تخصیص کامل ({fmtNum(allocSum)} {li.unit})
                                </span>
                              ) : isOver ? (
                                <span className="inline-flex items-center gap-1 text-[11px] font-semibold text-red-700 bg-red-50 border border-red-200 px-2.5 py-0.5 rounded-full">
                                  <AlertCircle className="w-3 h-3" />
                                  مازاد تخصیص: {fmtNum(Math.abs(diff))} {li.unit}
                                </span>
                              ) : (
                                <span className="inline-flex items-center gap-1 text-[11px] font-semibold text-amber-700 bg-amber-50 border border-amber-200 px-2.5 py-0.5 rounded-full">
                                  <AlertCircle className="w-3 h-3" />
                                  باقیمانده: {fmtNum(diff)} {li.unit}
                                </span>
                              )}
                            </div>
                          </div>

                          {/* ردیف‌های تخصیص — تراز افقی یکپارچه بدون جابجایی دکمه‌ها */}
                          <div className="flex flex-col gap-2.5 mb-3">
                            {allocs.map((alloc) => {
                              const otherUsedProjects = new Set(
                                allocs
                                  .filter((a) => a.rowId !== alloc.rowId)
                                  .map((a) => a.project_name.trim())
                                  .filter(Boolean)
                              );

                              const words = numberToPersianWords(alloc.quantity);

                              return (
                                <div
                                  key={alloc.rowId}
                                  className="flex flex-col sm:flex-row items-start gap-2.5 bg-white p-3 rounded-lg border border-line shadow-xs"
                                >
                                  {/* انتخاب پروژه و دکمه حذف موبایل */}
                                  <div className="flex items-center gap-2 flex-1 w-full sm:w-auto">
                                    <div className="flex-1 min-w-0">
                                      <select
                                        className="w-full h-9 rounded-md border border-line bg-panel px-2.5 py-1 font-inherit text-[12px] outline-none focus:border-primary focus:ring-1 focus:ring-primary transition-all text-slate-700"
                                        value={alloc.project_name}
                                        onChange={(e) =>
                                          updateAllocationRow(li.id, alloc.rowId, {
                                            project_name: e.target.value,
                                          })
                                        }
                                      >
                                        <option value="">انتخاب پروژه...</option>
                                        {projectOptions.map((p) => {
                                          const isUsed = otherUsedProjects.has(p);
                                          return (
                                            <option key={p} value={p} disabled={isUsed}>
                                              {p} {isUsed ? "(در ردیف دیگر انتخاب شده)" : ""}
                                            </option>
                                          );
                                        })}
                                      </select>
                                    </div>

                                    {/* دکمه حذف موبایل */}
                                    <button
                                      type="button"
                                      disabled={allocs.length <= 1}
                                      onClick={() => removeAllocationRow(li.id, alloc.rowId)}
                                      className="sm:hidden h-9 w-9 flex items-center justify-center rounded-md border border-line text-slate-400 hover:text-red-600 hover:bg-red-50 hover:border-red-200 transition-colors disabled:opacity-30 disabled:pointer-events-none shrink-0"
                                      title="حذف این ردیف تخصیص"
                                    >
                                      <Trash2 className="w-3.5 h-3.5" />
                                    </button>
                                  </div>

                                  {/* فیلد مقدار بدون اسپینر + واحد ثابت + متن حروفی */}
                                  <div className="flex flex-col w-full sm:w-44 shrink-0">
                                    <div className="flex items-stretch h-9 rounded-md border border-line bg-panel overflow-hidden focus-within:border-primary focus-within:ring-1 focus-within:ring-primary transition-all">
                                      <input
                                        type="number"
                                        step="any"
                                        min="0"
                                        placeholder="مقدار"
                                        className="flex-1 min-w-0 h-full bg-transparent px-2.5 py-1 font-inherit text-[12px] outline-none text-left font-mono [appearance:textfield] [&::-webkit-outer-spin-button]:appearance-none [&::-webkit-inner-spin-button]:appearance-none"
                                        style={{ MozAppearance: "textfield" }}
                                        dir="ltr"
                                        value={alloc.quantity}
                                        onChange={(e) =>
                                          updateAllocationRow(li.id, alloc.rowId, {
                                            quantity: e.target.value,
                                          })
                                        }
                                      />
                                      <div
                                        className="px-2.5 bg-slate-100 border-s border-line text-slate-600 text-[12px] font-medium flex items-center justify-center shrink-0 select-none min-w-[42px]"
                                        title={`واحد: ${li.unit}`}
                                      >
                                        {li.unit}
                                      </div>
                                    </div>

                                    {words ? (
                                      <div className="mt-1 text-[11px] text-slate-500 font-medium px-0.5 leading-tight text-right truncate" title={`${words} ${li.unit}`}>
                                        {words} {li.unit}
                                      </div>
                                    ) : null}
                                  </div>

                                  {/* دکمه حذف دسکتاپ — تراز شده با لبه بالای دراپ‌داون و اینپوت */}
                                  <button
                                    type="button"
                                    disabled={allocs.length <= 1}
                                    onClick={() => removeAllocationRow(li.id, alloc.rowId)}
                                    className="hidden sm:flex h-9 w-9 items-center justify-center rounded-md border border-line text-slate-400 hover:text-red-600 hover:bg-red-50 hover:border-red-200 transition-colors disabled:opacity-30 disabled:pointer-events-none shrink-0"
                                    title="حذف این ردیف تخصیص"
                                  >
                                    <Trash2 className="w-3.5 h-3.5" />
                                  </button>
                                </div>
                              );
                            })}
                          </div>

                          {/* فوتر کارت قلم */}
                          <div className="flex items-center justify-between pt-1">
                            <button
                              type="button"
                              onClick={() => addAllocationRow(li.id, targetQty)}
                              disabled={
                                allocs.length >= projectOptions.length && projectOptions.length > 0
                              }
                              className="inline-flex items-center gap-1.5 text-[12px] font-medium text-primary hover:text-primary/80 transition-colors disabled:opacity-40 disabled:cursor-not-allowed"
                            >
                              <Plus className="w-3.5 h-3.5" />
                              <span>افزودن ردیف تخصیص (پروژه دیگر)</span>
                            </button>
                            <span className="text-[11px] text-muted">
                              مجموع: {fmtNum(allocSum)} از {fmtNum(targetQty)} {li.unit}
                            </span>
                          </div>
                        </div>
                      );
                    })}
                </div>
              )}
            </section>

            {/* بخش ۴: فاکتورها، پیش‌فاکتورها و تاریخ */}
            <section className="bg-white rounded-xl shadow-sm border border-line p-4 md:p-5 space-y-6">
              <div>
                <h3 className="mb-2 text-[14px] font-bold text-slate-800">فاکتورهای اصلی</h3>
                <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>

              <div className="h-px bg-line w-full"></div>

              <div>
                <h3 className="mb-2 text-[14px] font-bold text-slate-800">پیش‌فاکتورها</h3>
                <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 className="h-px bg-line w-full"></div>

              <div className="max-w-xs">
                <label className="block mb-2 text-[13px] font-bold text-slate-800">تاریخ و زمان پذیرش</label>
                <JalaliDatePicker value={acceptDate} onChange={setAcceptDate} placeholder="تاریخ و ساعت" withTime />
              </div>
            </section>

          </div>

          {/* فوتر ثابت */}
          <div className="px-6 py-4 bg-white border-t border-line shrink-0 z-10">
            <DialogFooter className="flex w-full gap-3 sm:justify-end">
              <Button variant="slate" onClick={onClose} className="w-full sm:w-auto">
                انصراف
              </Button>
              <Button onClick={confirm} className="w-full sm:w-auto">
                ثبت معامله بسته‌شده
              </Button>
            </DialogFooter>
          </div>

        </div>
      </DialogContent>
    </Dialog>
  );
}