"use client";

import { useState } from "react";
import { useRouter } from "next/navigation";
import { Button } from "@/components/ui/button";
import { Input } from "@/components/ui/input";
import {
  Dialog,
  DialogContent,
  DialogHeader,
  DialogTitle,
  DialogFooter,
} from "@/components/ui/dialog";
import { Label } from "@/components/ui/label";
import { ArrowLeft, Save, Loader2, Download, Printer } from "lucide-react";
import { useBarcodeDesigner } from "@/contexts/BarcodeDesignerContext";
import { barcodeApi } from "@/lib/api/barcodeApi";
import { useToast } from "@/hooks/use-toast";
import { generateZPL } from "@/lib/zplGenerator";
import { BarcodePrintPreviewModal } from "./BarcodePrintPreviewModal";

export function BarcodeDesignerToolbar() {
  const router = useRouter();
  const { toast } = useToast();
  const {
    labelId,
    labelMaster,
    widthMm,
    heightMm,
    components,
    saveLayout,
    isSaving,
  } = useBarcodeDesigner();

  const handleDownloadZPL = () => {
    const layout = { width_mm: widthMm, height_mm: heightMm, components };
    const zpl = generateZPL(layout);
    const blob = new Blob([zpl], { type: "text/plain;charset=utf-8" });
    const url = URL.createObjectURL(blob);
    const a = document.createElement("a");
    a.href = url;
    a.download = (labelMaster?.label_name_kor || "label") + ".zpl";
    a.click();
    URL.revokeObjectURL(url);
    toast({ title: "다운로드", description: "ZPL 파일이 다운로드되었습니다. Zebra 프린터/유틸에서 사용하세요." });
  };

  const [saveDialogOpen, setSaveDialogOpen] = useState(false);
  const [printPreviewOpen, setPrintPreviewOpen] = useState(false);
  const [newLabelName, setNewLabelName] = useState("");
  const [creating, setCreating] = useState(false);

  const handleSave = async () => {
    if (labelId !== "new") {
      await saveLayout();
      return;
    }
    setSaveDialogOpen(true);
  };

  const handleCreateAndSave = async () => {
    const name = newLabelName.trim();
    if (!name) {
      toast({
        title: "입력 필요",
        description: "라벨명을 입력하세요.",
        variant: "destructive",
      });
      return;
    }
    setCreating(true);
    try {
      const createRes = await barcodeApi.createLabel({
        labelNameKor: name,
      });
      if (!createRes.success || !createRes.data?.labelId) throw new Error(createRes.message || "생성 실패");
      const newId = createRes.data.labelId;

      await barcodeApi.saveLayout(newId, {
        width_mm: widthMm,
        height_mm: heightMm,
        components: components.map((c, i) => ({ ...c, zIndex: i })),
      });

      toast({ title: "저장됨", description: "라벨이 생성되었습니다." });
      setSaveDialogOpen(false);
      setNewLabelName("");
      router.push(`/admin/screenMng/barcodeList/designer/${newId}`);
    } catch (e: any) {
      toast({
        title: "저장 실패",
        description: e.message || "라벨 생성에 실패했습니다.",
        variant: "destructive",
      });
    } finally {
      setCreating(false);
    }
  };

  return (
    <>
      <div className="flex items-center justify-between border-b bg-white px-4 py-2">
        <div className="flex items-center gap-2">
          <Button
            variant="ghost"
            size="sm"
            className="gap-1"
            onClick={() => router.push("/admin/screenMng/barcodeList")}
          >
            <ArrowLeft className="h-4 w-4" />
            목록
          </Button>
          <span className="text-muted-foreground text-sm">
            {labelId === "new" ? "새 라벨" : labelMaster?.label_name_kor || "바코드 라벨 디자이너"}
          </span>
        </div>
        <div className="flex items-center gap-2">
          <Button
            size="sm"
            variant="outline"
            className="gap-1"
            onClick={() => setPrintPreviewOpen(true)}
          >
            <Printer className="h-4 w-4" />
            인쇄 미리보기
          </Button>
          <Button size="sm" variant="outline" className="gap-1" onClick={handleDownloadZPL}>
            <Download className="h-4 w-4" />
            ZPL 다운로드
          </Button>
          <Button size="sm" className="gap-1" onClick={handleSave} disabled={isSaving || creating}>
            {(isSaving || creating) ? (
              <Loader2 className="h-4 w-4 animate-spin" />
            ) : (
              <Save className="h-4 w-4" />
            )}
            저장
          </Button>
        </div>
      </div>

      <BarcodePrintPreviewModal
        open={printPreviewOpen}
        onOpenChange={setPrintPreviewOpen}
        layout={{
          width_mm: widthMm,
          height_mm: heightMm,
          components: components.map((c, i) => ({ ...c, zIndex: i })),
        }}
        labelName={labelMaster?.label_name_kor || "라벨"}
      />

      <Dialog open={saveDialogOpen} onOpenChange={setSaveDialogOpen}>
        <DialogContent>
          <DialogHeader>
            <DialogTitle>새 라벨 저장</DialogTitle>
          </DialogHeader>
          <div className="space-y-2 py-2">
            <Label>라벨명 (한글)</Label>
            <Input
              value={newLabelName}
              onChange={(e) => setNewLabelName(e.target.value)}
              placeholder="예: 품목 바코드 라벨"
            />
          </div>
          <DialogFooter>
            <Button variant="outline" onClick={() => setSaveDialogOpen(false)}>
              취소
            </Button>
            <Button onClick={handleCreateAndSave} disabled={creating}>
              {creating ? <Loader2 className="h-4 w-4 animate-spin" /> : null}
              저장
            </Button>
          </DialogFooter>
        </DialogContent>
      </Dialog>
    </>
  );
}