import {useState} from 'react';
import {
  AlertTriangle,
  Check,
  ClipboardCopy,
  Image as ImageIcon,
  Info,
  FileText,
  Loader2,
  MessageCircleQuestion,
  Pencil,
  Plus,
  Shapes,
  Sparkles,
  Trash2,
  Wand2,
  X,
} from 'lucide-react';
import type {InfoField} from '@o2o/shared';
import {Badge} from '@/components/ui/badge';
import {Button} from '@/components/ui/button';
import {Input} from '@/components/ui/input';
import {PasteFactsPanel, RecollectPanel} from '@/features/onboarding';
import {cn} from '@/lib/utils';
import {useBuilderStore, useUnverifiedFields, type RightTab} from '@/stores/builder';
import {INDUSTRY_CONFIGS} from '@/data/industryData';
import {FaqPanel} from './FaqPanel';
import {SectionDesignPanel} from './SectionDesignPanel';
import {resolveVariant} from './canvas/registry';
import {
  buildPrompt,
  dataSpecFor,
  parseSectionData,
  SECTION_DATA_MAX_CHARS,
} from './canvas/dataSpec';

const TABS: {id: RightTab; label: string; icon: typeof Info}[] = [
  {id: 'content', label: '콘텐츠', icon: FileText},
  {id: 'design', label: '디자인', icon: Shapes},
  {id: 'photos', label: '사진', icon: ImageIcon},
  {id: 'info', label: '정보', icon: Info},
  {id: 'faq', label: 'FAQ', icon: MessageCircleQuestion},
  {id: 'verify', label: '확인', icon: AlertTriangle},
];

export function RightTabsPanel() {
  const activeTab = useBuilderStore((s) => s.rightTab);
  const setRightTab = useBuilderStore((s) => s.setRightTab);
  const unverified = useUnverifiedFields();

  return (
    <div className="flex h-full w-full shrink-0 select-none flex-col overflow-hidden border-l border-border bg-card lg:w-[290px]">
      <div className="flex items-center gap-1 border-b border-border bg-muted/50 p-1">
        {TABS.map(({id, label, icon: Icon}) => (
          <button
            key={id}
            type="button"
            onClick={() => setRightTab(id)}
            aria-pressed={activeTab === id}
            className={cn(
              'flex min-w-0 flex-1 cursor-pointer items-center justify-center gap-0.5 rounded-md px-0.5 py-2 text-[11px] font-semibold transition-colors',
              activeTab === id
                ? 'border border-border bg-card text-foreground'
                : 'text-muted-foreground hover:text-foreground',
            )}
          >
            <Icon className={cn('size-3.5', id === 'verify' && unverified.length > 0 && 'text-warning')} />
            <span className="truncate">{label}</span>
            {id === 'verify' && unverified.length > 0 && (
              <span className="ml-0.5 rounded-full bg-warning px-1.5 font-mono text-[10px] font-bold leading-tight text-white">
                {unverified.length}
              </span>
            )}
          </button>
        ))}
      </div>

      {activeTab === 'design' && <SectionDesignPanel />}
      {activeTab === 'content' && <ContentTab />}
      {activeTab === 'photos' && <PhotosTab />}
      {activeTab === 'info' && <InfoTab />}
      {activeTab === 'faq' && <FaqPanel />}
      {activeTab === 'verify' && <VerifyTab fields={unverified} />}
    </div>
  );
}

function ContentTab() {
  const industry = useBuilderStore((s) => s.industry);
  const sections = useBuilderStore((s) => s.sections);
  const selectedSectionId = useBuilderStore((s) => s.selectedSectionId);
  const updateSectionContent = useBuilderStore((s) => s.updateSectionContent);
  const storeName = useBuilderStore((s) => s.storeName);
  const setStoreName = useBuilderStore((s) => s.setStoreName);
  const section = sections.find((item) => item.id === selectedSectionId);

  if (!section) {
    return (
      <div className="flex flex-1 flex-col items-center justify-center gap-2 p-6 text-center text-muted-foreground">
        <FileText className="size-5" />
        <p className="text-xs font-semibold text-foreground">편집할 섹션을 선택하세요</p>
        <p className="text-[11px]">왼쪽 섹션 목록이나 미리보기에서 선택할 수 있습니다.</p>
      </div>
    );
  }

  const update = (patch: {name?: string; description?: string; body?: string}) =>
    updateSectionContent(section.id, {
      name: patch.name ?? section.name,
      description: patch.description ?? section.description,
      body: patch.body ?? section.body,
    });
  const variantId = resolveVariant(section, industry)?.id ?? '';
  const supportsTitle = section.type !== 'local';
  const supportsDescription = !(
    variantId.startsWith('rooms.') || variantId.startsWith('rules.') ||
    variantId.startsWith('local.') || variantId === 'menu.price-table' ||
    variantId === 'space.list' || variantId === 'programs.table' ||
    variantId === 'exhibition.notice'
  );
  const supportsBody =
    variantId.startsWith('intro.') || variantId.startsWith('booking.') ||
    variantId === 'inquiry.cta' || variantId === 'exhibition.notice';

  return (
    <div className="flex-1 space-y-4 overflow-y-auto p-3.5">
      <div className="border-b border-border pb-2">
        <p className="text-xs font-bold">{section.name} 콘텐츠</p>
        <p className="mt-0.5 text-[10px] text-muted-foreground">입력 즉시 미리보기에 반영됩니다.</p>
      </div>
      {supportsTitle && section.type === 'hero' ? (
        <label className="block space-y-1">
          <span className="text-xs font-semibold">대표 제목</span>
          <Input value={storeName} onChange={(event) => setStoreName(event.target.value)} className="text-xs" />
        </label>
      ) : supportsTitle ? (
        <label className="block space-y-1">
          <span className="text-xs font-semibold">섹션 제목</span>
          <Input value={section.name} onChange={(event) => update({name: event.target.value})} className="text-xs" />
        </label>
      ) : null}
      {supportsDescription && <label className="block space-y-1">
        <span className="text-xs font-semibold">한 줄 설명</span>
        <Input
          value={section.description ?? ''}
          onChange={(event) => update({description: event.target.value})}
          placeholder="제목 아래에 표시할 설명"
          className="text-xs"
        />
      </label>}
      {supportsBody && <label className="block space-y-1">
        <span className="text-xs font-semibold">본문</span>
        <textarea
          value={section.body ?? ''}
          onChange={(event) => update({body: event.target.value})}
          placeholder="섹션에 표시할 본문을 입력하세요"
          rows={7}
          className="w-full resize-y rounded-md border border-input bg-background px-3 py-2 text-xs leading-relaxed outline-none focus:border-ring focus:ring-2 focus:ring-ring/30"
        />
      </label>}
      {dataSpecFor(section.type) && <SectionDataPanel sectionId={section.id} sectionType={section.type} />}
      {!supportsTitle && !supportsDescription && !supportsBody && !dataSpecFor(section.type) && (
        <p className="rounded-md border border-dashed border-border p-3 text-center text-[11px] text-muted-foreground">
          이 레이아웃에는 직접 입력하는 문구가 없습니다. 수집된 데이터만 표시합니다.
        </p>
      )}
      <p className="rounded-md bg-muted/50 p-2.5 text-[10px] leading-relaxed text-muted-foreground">
        목록형 데이터는 해당 관리 탭에서 편집하고, 이곳에서는 섹션의 제목·설명·소개 본문을 편집합니다.
      </p>
    </div>
  );
}

/**
 * 붙여넣기 아이템의 JSON 입력.
 *
 * ★ 원문을 그대로 저장한다. 깨진 JSON 도 담아 두고, 왜 깨졌는지만 아래에 말한다 —
 *   저장을 막으면 사장님은 고칠 기회 없이 쓰던 걸 잃는다.
 */
function SectionDataPanel({sectionId, sectionType}: {sectionId: string; sectionType: string}) {
  const spec = dataSpecFor(sectionType);
  const sections = useBuilderStore((s) => s.sections);
  const updateSectionData = useBuilderStore((s) => s.updateSectionData);
  const storeName = useBuilderStore((s) => s.storeName);
  const location = useBuilderStore((s) => s.location);
  const industry = useBuilderStore((s) => s.industry);
  const [copied, setCopied] = useState(false);
  const [showPrompt, setShowPrompt] = useState(false);

  const section = sections.find((item) => item.id === sectionId);
  if (!spec || !section) return null;

  const raw = section.data ?? '';
  const parsed = parseSectionData(sectionType, raw);
  const tooLong = raw.length > SECTION_DATA_MAX_CHARS;

  // 상호·주소가 이미 박혀 있는 프롬프트. 사장님이 빈칸을 채울 일이 없어야 한다.
  const promptText = buildPrompt(spec, {
    storeName,
    location,
    industryLabel: INDUSTRY_CONFIGS[industry].name,
  });

  const copyPrompt = async () => {
    const text = promptText;
    try {
      await navigator.clipboard.writeText(text);
      setCopied(true);
      setTimeout(() => setCopied(false), 1600);
    } catch {
      // 클립보드가 막힌 브라우저 — 프롬프트를 화면에 띄워 직접 긁을 수 있게 한다.
      window.prompt('아래 프롬프트를 복사해 ChatGPT 에 붙여넣으세요', text);
    }
  };

  /** 유효한 JSON 만 2칸 들여쓰기로 다시 쓴다. 깨져 있으면 손대지 않는다. */
  const tidy = () => {
    try {
      updateSectionData(sectionId, JSON.stringify(JSON.parse(raw), null, 2));
    } catch {
      // 그대로 둔다 — 아래 오류 줄이 이미 어디가 깨졌는지 말하고 있다.
    }
  };

  return (
    <div className="space-y-2 rounded-md border border-border bg-muted/30 p-2.5">
      <div className="flex items-center gap-1.5">
        <Sparkles className="size-3.5 text-primary" />
        <span className="text-xs font-bold">{spec.label} 내용 (JSON)</span>
      </div>
      <p className="text-[10px] leading-relaxed text-muted-foreground">
        프롬프트를 복사해 ChatGPT·Claude 에 그대로 붙여넣으면 JSON 을 줍니다. 받은 JSON 을 아래에 붙여넣으세요.
      </p>

      <div className="flex flex-wrap gap-1.5">
        <Button type="button" size="sm" variant="primary" className="h-7 gap-1 text-[11px]" onClick={copyPrompt}>
          <ClipboardCopy className="size-3" />
          {copied ? '복사됨' : '프롬프트 복사'}
        </Button>
        <Button
          type="button"
          size="sm"
          variant="outline"
          className="h-7 gap-1 text-[11px]"
          onClick={() => updateSectionData(sectionId, spec.sample)}
        >
          <Wand2 className="size-3" />
          예시 넣기
        </Button>
        <Button
          type="button"
          size="sm"
          variant="ghost"
          className="h-7 text-[11px]"
          onClick={() => setShowPrompt((v) => !v)}
        >
          {showPrompt ? '프롬프트 접기' : '프롬프트 보기'}
        </Button>
        <Button
          type="button"
          size="sm"
          variant="outline"
          className="h-7 text-[11px]"
          onClick={tidy}
          disabled={!raw.trim() || Boolean(parsed.error)}
        >
          줄맞춤
        </Button>
      </div>

      {showPrompt && (
        <div className="space-y-1">
          <p className="text-[10px] text-muted-foreground">
            아래 내용이 그대로 복사됩니다. 상호와 지역은 이미 채워져 있습니다.
          </p>
          <textarea
            readOnly
            value={promptText}
            rows={12}
            spellCheck={false}
            onFocus={(event) => event.currentTarget.select()}
            className="w-full resize-y rounded-md border border-border bg-background/60 px-2.5 py-2 font-mono text-[10px] leading-relaxed text-muted-foreground outline-none"
          />
        </div>
      )}

      <textarea
        value={raw}
        onChange={(event) => updateSectionData(sectionId, event.target.value)}
        placeholder={`{ "kind": "${spec.kind}", "items": [ ... ] }`}
        rows={10}
        spellCheck={false}
        className="w-full resize-y rounded-md border border-input bg-background px-2.5 py-2 font-mono text-[11px] leading-relaxed outline-none focus:border-ring focus:ring-2 focus:ring-ring/30"
      />

      {parsed.error ? (
        <p className="flex items-start gap-1.5 text-[10px] leading-relaxed text-destructive">
          <AlertTriangle className="mt-px size-3 shrink-0" />
          {parsed.error}
        </p>
      ) : raw.trim() ? (
        <p className="text-[10px] text-muted-foreground">
          {spec.label} {parsed.items.length}개 · 출처 {parsed.sourced}개
          {parsed.unverified > 0 && ` · 확인필요 ${parsed.unverified}개`}
        </p>
      ) : null}

      {parsed.kindMismatch && (
        <p className="flex items-start gap-1.5 text-[10px] leading-relaxed text-warning">
          <AlertTriangle className="mt-px size-3 shrink-0" />
          이 JSON 은 &quot;{parsed.kindMismatch}&quot; 아이템 것입니다. {spec.label} 섹션에는 kind 가 &quot;{spec.kind}&quot; 인
          JSON 을 넣어 주세요.
        </p>
      )}

      {tooLong && (
        <p className="flex items-start gap-1.5 text-[10px] leading-relaxed text-destructive">
          <AlertTriangle className="mt-px size-3 shrink-0" />
          너무 깁니다({raw.length.toLocaleString()}자). {SECTION_DATA_MAX_CHARS.toLocaleString()}자 아래로 줄여
          주세요 — 이 상태로는 디자인 설정이 서버에 저장되지 않습니다.
        </p>
      )}
    </div>
  );
}

function PhotosTab() {
  const photos = useBuilderStore((s) => s.photos);
  const setPrimaryPhoto = useBuilderStore((s) => s.setPrimaryPhoto);
  const togglePhotoVisibility = useBuilderStore((s) => s.togglePhotoVisibility);
  const visibleCount = photos.filter((photo) => photo.isVisible !== false).length;

  return (
    <div className="flex-1 space-y-3 overflow-y-auto p-3.5">
      <div className="flex items-center justify-between border-b border-border pb-2">
        <span className="text-xs font-bold">업장 이미지 에셋 ({photos.length})</span>
        <span className="text-[10px] text-muted-foreground">갤러리 {visibleCount}장</span>
      </div>

      <div className="grid grid-cols-2 gap-2.5">
        {photos.map((photo) => (
          <div
            key={photo.id}
            className={cn(
              'group relative aspect-4/3 overflow-hidden rounded-md border transition-all',
              photo.isVisible === false && 'opacity-45 grayscale',
              photo.isPrimary
                ? 'border-2 border-primary ring-1 ring-primary'
                : 'border-border hover:border-muted-foreground/40',
            )}
          >
            <button type="button" onClick={() => setPrimaryPhoto(photo.id)} className="size-full cursor-pointer">
              <img
                src={photo.url}
                alt={photo.title}
                loading="lazy"
                referrerPolicy="no-referrer"
                className="size-full object-cover"
              />
            </button>
            <span className="absolute inset-x-0 bottom-0 block truncate bg-gradient-to-t from-black/80 to-transparent p-1.5 text-left text-[10px] font-medium text-white">
              {photo.title}
            </span>
            {photo.isPrimary ? (
              <span className="absolute left-1 top-1 rounded bg-primary px-1.5 py-0.5 text-[9px] font-bold text-primary-foreground">
                대표
              </span>
            ) : (
              <span className="absolute left-1 top-1 rounded bg-black/40 px-1 py-0.5 text-[9px] text-white opacity-0 transition-opacity group-hover:opacity-100">
                대표 지정
              </span>
            )}
            <label className="absolute right-1 top-1 flex cursor-pointer items-center gap-1 rounded bg-black/65 px-1.5 py-1 text-[9px] font-semibold text-white">
              <input
                type="checkbox"
                checked={photo.isVisible !== false}
                onChange={() => togglePhotoVisibility(photo.id)}
                className="size-3 accent-white"
              />
              표시
            </label>
          </div>
        ))}
      </div>

      <p className="rounded-md border border-dashed border-border bg-muted/40 p-2.5 text-center text-xs text-muted-foreground">
        <span className="block font-medium">새 사진 추가</span>
        <span className="text-[10px]">
          업로드한 사진은 출처가 <code className="font-mono">owner</code>로 기록됩니다
        </span>
      </p>
    </div>
  );
}

function InfoTab() {
  const infoFields = useBuilderStore((s) => s.infoFields);
  const updateField = useBuilderStore((s) => s.updateField);
  const updateFieldLabel = useBuilderStore((s) => s.updateFieldLabel);
  const addInfoField = useBuilderStore((s) => s.addInfoField);
  const removeInfoField = useBuilderStore((s) => s.removeInfoField);
  const [newLabel, setNewLabel] = useState('');
  const [newValue, setNewValue] = useState('');
  const placeId = useBuilderStore((s) => s.placeId);
  // ★ 셀렉터 안에서 새 배열을 만들지 않는다(스토어 상단 주의사항) — state 의 배열을 그대로 받아
  //   여기서 includes 로 좁힌다. 셀렉터가 매번 새 배열을 돌려주면 무한 렌더로 죽는다.
  const savingFieldIds = useBuilderStore((s) => s.savingFieldIds);

  return (
    <div className="flex-1 space-y-3 overflow-y-auto p-3.5">
      <div className="flex items-center justify-between border-b border-border pb-2">
        <span className="text-xs font-bold">기본 정보 수정</span>
        {/* 데모는 이 화면 안에서만 도는 값이고, 실사업장은 고치는 즉시 서버로 올라간다. */}
        <span className="text-[10px] text-muted-foreground">
          {placeId ? '고치면 서버에 저장' : '캔버스 즉시 반영'}
        </span>
      </div>

      <div className="space-y-3">
        {infoFields.map((field) => {
          const isHidden = field.requiresVerification && !field.isVerified;
          const isSaving = savingFieldIds.includes(field.id);

          return (
            <div key={field.id} className="space-y-1">
              <div className="flex items-center justify-between gap-2">
                {field.id.startsWith('custom_') ? (
                  <Input
                    aria-label="항목 이름"
                    value={field.label}
                    onChange={(event) => updateFieldLabel(field.id, event.target.value)}
                    className="h-7 flex-1 text-xs font-semibold"
                  />
                ) : <label htmlFor={`field-${field.id}`} className="text-xs font-semibold">{field.label}</label>}
                {isSaving ? (
                  <span className="flex items-center gap-1 text-[10px] text-muted-foreground">
                    <Loader2 className="size-2.5 animate-spin" />
                    저장 중
                  </span>
                ) : isHidden ? (
                  <Badge variant="warning" className="text-[10px]">
                    확인 대기 (숨김)
                  </Badge>
                ) : (
                  <span className="text-[10px] text-muted-foreground">노출 중</span>
                )}
              </div>
              <Input
                id={`field-${field.id}`}
                value={field.value}
                onChange={(e) => updateField(field.id, e.target.value)}
                className="text-xs"
              />
              {field.id.startsWith('custom_') && (
                <button
                  type="button"
                  onClick={() => removeInfoField(field.id)}
                  className="flex items-center gap-1 text-[10px] text-destructive hover:underline"
                >
                  <Trash2 className="size-3" /> 항목 삭제
                </button>
              )}
            </div>
          );
        })}
      </div>

      <div className="space-y-2 rounded-lg border border-dashed border-border bg-muted/30 p-3">
        <div className="flex items-center gap-1.5 text-xs font-bold"><Plus className="size-3.5" /> 새 정보 항목</div>
        <Input value={newLabel} onChange={(event) => setNewLabel(event.target.value)} placeholder="항목 이름 (예: 반려동물 동반)" className="text-xs" />
        <Input value={newValue} onChange={(event) => setNewValue(event.target.value)} placeholder="내용" className="text-xs" />
        <Button
          size="sm"
          className="w-full"
          disabled={!newLabel.trim() || !newValue.trim()}
          onClick={() => {
            addInfoField(newLabel.trim(), newValue.trim());
            setNewLabel('');
            setNewValue('');
          }}
        >
          <Plus /> 항목 추가
        </Button>
      </div>

      <p className="text-[11px] leading-relaxed text-muted-foreground">
        여기서 직접 고친 값은 <strong className="text-foreground">사장님이 확정한 값</strong>으로
        기록되어, 이후 자동 수집이 덮어쓰지 않습니다.
      </p>

      {/* ★ 재수집을 [정보] 탭 아래에 둔다. 에디터에서 "이 값이 옛날 값인데"를 깨닫는 자리가
          바로 여기라, 다시 가져오는 버튼도 같은 자리에 있어야 찾는다.
          데모(placeId 없음)에서는 패널이 스스로 사라진다. */}
      <RecollectPanel placeId={placeId} />
      <PasteFactsPanel placeId={placeId} />
    </div>
  );
}

function VerifyTab({fields}: {fields: InfoField[]}) {
  const verifyField = useBuilderStore((s) => s.verifyField);
  const [editingId, setEditingId] = useState<string | null>(null);
  const [draft, setDraft] = useState('');

  const startEdit = (field: InfoField) => {
    setEditingId(field.id);
    setDraft(field.value);
  };

  const saveEdit = (fieldId: string) => {
    const trimmed = draft.trim();
    if (trimmed) verifyField(fieldId, trimmed);
    setEditingId(null);
    setDraft('');
  };

  return (
    <div className="flex-1 space-y-3 overflow-y-auto p-3.5">
      <div className="flex items-center justify-between border-b border-border pb-2">
        <span className="text-xs font-bold">확인 필요 항목 ({fields.length})</span>
        <span className="text-[10px] font-semibold text-warning">승인해야 사이트에 노출</span>
      </div>

      {fields.length === 0 ? (
        <div className="my-4 space-y-2 rounded-lg border border-success/30 bg-success/8 p-6 text-center">
          <span className="mx-auto flex size-8 items-center justify-center rounded-full bg-success/15 text-success">
            <Check className="size-4" />
          </span>
          <h3 className="text-xs font-bold text-success">모든 정보가 확인되었습니다</h3>
          <p className="text-[11px] text-success/90">
            확인된 항목만 사이트와 구조화 데이터에 나갑니다.
          </p>
        </div>
      ) : (
        <div className="space-y-3">
          <p className="text-[11px] leading-relaxed text-muted-foreground">
            공개 채널에서 자동 수집한 값입니다. 맞으면{' '}
            <strong className="text-foreground">[맞아요]</strong>, 틀리면{' '}
            <strong className="text-foreground">[아니에요]</strong>로 고쳐주세요. 확인 전에는{' '}
            <strong className="text-foreground">사이트에 나가지 않습니다.</strong>
          </p>

          {fields.map((field) => {
            const isEditing = editingId === field.id;

            return (
              <div
                key={field.id}
                className="space-y-2 rounded-lg border border-warning/40 bg-warning/8 p-3 text-xs"
              >
                <div className="flex items-center justify-between gap-2">
                  <span className="flex items-center gap-1 font-bold">
                    <AlertTriangle className="size-3.5 text-warning" />
                    {field.label}
                  </span>
                  {field.source && (
                    <span className="shrink-0 text-[10px] text-muted-foreground">
                      {field.source}
                    </span>
                  )}
                </div>

                {!isEditing ? (
                  <>
                    <p className="break-words rounded border border-warning/30 bg-card p-2 font-medium">
                      {field.value}
                    </p>

                    <div className="flex items-center gap-1.5 pt-1">
                      <Button
                        variant="primary"
                        size="sm"
                        className="flex-1"
                        onClick={() => verifyField(field.id)}
                      >
                        <Check />
                        <span>맞아요</span>
                      </Button>
                      <Button
                        variant="secondary"
                        size="sm"
                        className="flex-1"
                        onClick={() => startEdit(field)}
                      >
                        <Pencil />
                        <span>아니에요</span>
                      </Button>
                    </div>
                  </>
                ) : (
                  <div className="space-y-2 pt-1">
                    <label
                      htmlFor={`verify-${field.id}`}
                      className="block text-[11px] font-semibold"
                    >
                      정확한 정보를 입력해주세요
                    </label>
                    <Input
                      id={`verify-${field.id}`}
                      value={draft}
                      onChange={(e) => setDraft(e.target.value)}
                      placeholder={`${field.label} 정보 입력`}
                      autoFocus
                      className="text-xs"
                      onKeyDown={(event) => {
                        if (event.key === 'Enter') saveEdit(field.id);
                        if (event.key === 'Escape') setEditingId(null);
                      }}
                    />
                    <div className="flex items-center gap-1.5">
                      <Button
                        variant="primary"
                        size="sm"
                        className="flex-1"
                        onClick={() => saveEdit(field.id)}
                        disabled={!draft.trim()}
                      >
                        반영하고 승인
                      </Button>
                      <Button
                        variant="ghost"
                        size="icon"
                        aria-label="수정 취소"
                        onClick={() => setEditingId(null)}
                      >
                        <X />
                      </Button>
                    </div>
                  </div>
                )}
              </div>
            );
          })}
        </div>
      )}
    </div>
  );
}