/**
 * ChannelLinkButtons — 등록된 플랫폼 URL/핸들로 새 탭 열기 버튼 묶음.
 *
 * Report / Plan 헤더 영역에서 공통 사용.
 *  - 입력은 normalized handle(@view_clinic) 또는 URL(view.co.kr) 모두 허용
 *  - 비어있는 플랫폼은 자동 생략
 *  - 디자인: white/60 backdrop-blur + 호버 시 더 진해짐 (ReportHeader 의 메타 칩과 동일 톤)
 */
import { ExternalLink, Heart, MapPin, Globe, Instagram, Youtube, Facebook, Music, FileText, type LucideIcon } from 'lucide-react';

export interface ChannelHandles {
  website?: string | null;
  instagram?: string | null;
  youtube?: string | null;
  facebook?: string | null;
  tiktok?: string | null;
  gangnamUnni?: string | null;
  naverPlace?: string | null;
  naverBlog?: string | null;
}

type PlatformKey = keyof ChannelHandles;

interface PlatformMeta {
  label: string;
  color: string;
  Icon: LucideIcon;
  buildUrl: (handle: string) => string;
}

const META: Record<PlatformKey, PlatformMeta> = {
  website: {
    label: '홈페이지',
    color: '#6C5CE7',
    Icon: Globe,
    buildUrl: (h) => (/^https?:\/\//.test(h) ? h : `https://${h}`),
  },
  instagram: {
    label: 'Instagram',
    color: '#833AB4',
    Icon: Instagram,
    buildUrl: (h) => `https://instagram.com/${h.replace(/^@/, '')}`,
  },
  youtube: {
    label: 'YouTube',
    color: '#FF3D3D',
    Icon: Youtube,
    buildUrl: (h) => `https://youtube.com/${h.startsWith('@') ? h : `@${h}`}`,
  },
  facebook: {
    label: 'Facebook',
    color: '#1877F2',
    Icon: Facebook,
    buildUrl: (h) => (/^https?:\/\//.test(h) ? h : `https://facebook.com/${h}`),
  },
  tiktok: {
    label: 'TikTok',
    color: '#0A1128',
    Icon: Music,
    buildUrl: (h) => `https://tiktok.com/${h.startsWith('@') ? h : `@${h}`}`,
  },
  gangnamUnni: {
    label: '강남언니',
    color: '#FF6B8A',
    Icon: Heart,
    buildUrl: (h) => {
      if (/^https?:\/\//.test(h)) return h;
      if (/gangnamunni\.com\//.test(h)) return `https://www.${h.replace(/^\/+/, '')}`;
      return `https://www.gangnamunni.com/hospitals/${h.replace(/^\//, '')}`;
    },
  },
  naverPlace: {
    label: '네이버 플레이스',
    color: '#03C75A',
    Icon: MapPin,
    buildUrl: (h) => {
      if (/^https?:\/\//.test(h)) return h;
      if (/place\.naver\.com\//.test(h)) return `https://m.${h.replace(/^m\./, '').replace(/^\/+/, '')}/home`;
      return `https://m.place.naver.com/hospital/${h.replace(/^\//, '')}/home`;
    },
  },
  naverBlog: {
    label: '네이버 블로그',
    color: '#03C75A',
    Icon: FileText,
    buildUrl: (h) => {
      if (/^https?:\/\//.test(h)) return h;
      if (/blog\.naver\.com\//.test(h)) return `https://${h.replace(/^\/+/, '')}`;
      return `https://blog.naver.com/${h.replace(/^\//, '')}`;
    },
  },
};

const ORDER: PlatformKey[] = [
  'website',
  'youtube',
  'instagram',
  'facebook',
  'naverPlace',
  'naverBlog',
  'gangnamUnni',
  'tiktok',
];

interface ChannelLinkButtonsProps {
  handles: ChannelHandles;
  variant?: 'light' | 'solid';
  className?: string;
}

export function ChannelLinkButtons({
  handles,
  variant = 'light',
  className,
}: ChannelLinkButtonsProps) {
  const entries = ORDER.flatMap((key) => {
    const handle = handles[key];
    if (!handle) return [];
    return [{ key, handle }];
  });
  if (entries.length === 0) return null;

  const baseClass =
    variant === 'light'
      ? 'bg-white/60 backdrop-blur-sm border border-white/40 hover:bg-white/80 text-slate-700'
      : 'bg-white border border-slate-200 hover:border-slate-300 hover:bg-slate-50 text-slate-700';

  return (
    <div className={`flex flex-wrap gap-2 ${className ?? ''}`}>
      {entries.map(({ key, handle }) => {
        const meta = META[key];
        const Icon = meta.Icon;
        const url = meta.buildUrl(handle);
        return (
          <a
            key={key}
            href={url}
            target="_blank"
            rel="noopener noreferrer"
            className={`inline-flex items-center gap-2 rounded-full px-3.5 py-2 text-xs font-medium transition-colors ${baseClass}`}
            title={`${meta.label} — ${url}`}
          >
            <Icon size={16} className="shrink-0" style={{ color: meta.color }} />
            <span className="truncate max-w-[140px]">{handle}</span>
            <ExternalLink size={12} className="text-slate-400" />
          </a>
        );
      })}
    </div>
  );
}