/**
 * 오늘의 엽서 — 엽서 뒷면 더미.
 *
 * 앞면(사진)은 없다. 쓸 수 있는 사진이 없기도 하고, 이 아이템의 목적이 **손님이 자기 계정에
 * 붙여넣는 것**이라 글이 놓이는 뒷면이 전부다. 우표 자리·소인·가운데 괘선이 그 형식을 만든다.
 */
import {useState} from 'react';
import {Check, Copy} from 'lucide-react';
import {Rail, SectionBody, SectionFrame} from '../../primitives';
import type {SectionRenderProps} from '../../types';
import {parseSectionData, type PostcardItem} from '@o2o/shared';
import {
  ITEM_ACCENT,
  ITEM_BODY,
  ITEM_BORDER,
  ITEM_CARD,
  ITEM_HEADING,
  ITEM_INK,
  ParseError,
  PasteHint,
  SourceLine,
} from '../items/common';
import '../items/items.css';

function Postcard({item}: {item: PostcardItem}) {
  const [copied, setCopied] = useState(false);
  const text = [item.line, (item.hashtags ?? []).join(' ')].filter(Boolean).join(' ');

  const copy = (event: React.MouseEvent) => {
    event.stopPropagation();
    navigator.clipboard.writeText(text).then(
      () => {
        setCopied(true);
        setTimeout(() => setCopied(false), 1600);
      },
      () => {
        // 클립보드가 막힌 브라우저 — 직접 긁어 갈 수 있게 띄운다.
        window.prompt('아래 문장을 복사하세요', text);
      },
    );
  };

  return (
    <article
      className="w4-paper w-[304px] shrink-0 snap-center border p-4 shadow-[4px_4px_0_rgba(27,26,21,.13)]"
      style={{backgroundColor: ITEM_CARD, borderColor: ITEM_INK}}
    >
      <div className="grid grid-cols-[minmax(0,1fr)_auto] gap-3">
        {/* 가운데 괘선 — 엽서 뒷면을 반으로 가르는 그 선 */}
        <div className="min-w-0 border-r pr-3" style={{borderColor: ITEM_BORDER}}>
          <p className="text-[19px] leading-snug" style={{fontFamily: ITEM_BODY}}>
            “{item.line}”
          </p>
          {item.hashtags && item.hashtags.length > 0 && (
            <p className="mt-2 text-[11px] opacity-60">{item.hashtags.join(' ')}</p>
          )}
        </div>

        <div className="flex w-[62px] flex-col items-center gap-3">
          <span
            className="grid h-[56px] w-[44px] place-items-center border border-dashed text-center text-[9px] leading-tight opacity-60"
            style={{borderColor: ITEM_BORDER}}
          >
            郵票
            <br />
            10원
          </span>
          <span
            className="grid size-[54px] -rotate-6 place-items-center rounded-full border-2 px-1 text-center text-[9px] leading-tight"
            style={{fontFamily: ITEM_HEADING, borderColor: ITEM_ACCENT, color: ITEM_ACCENT}}
          >
            {item.postmark || item.place || '소인'}
          </span>
        </div>
      </div>

      <div
        className="mt-3 flex items-center justify-between gap-2 border-t border-dashed pt-2.5"
        style={{borderColor: ITEM_BORDER}}
      >
        <SourceLine source={item.source} verified={item.verified} />
        <button
          type="button"
          onClick={copy}
          className="flex shrink-0 items-center gap-1 border px-2 py-1 text-[10px] opacity-75 transition-opacity hover:opacity-100"
          style={{borderColor: ITEM_BORDER}}
        >
          {copied ? <Check className="size-3" /> : <Copy className="size-3" />}
          {copied ? '복사됨' : '복사'}
        </button>
      </div>
    </article>
  );
}

export function PostcardStack(props: SectionRenderProps) {
  const {section, isSelected, onSelect} = props;
  const parsed = parseSectionData<PostcardItem>(section.type, section.data);

  return (
    <SectionFrame section={section} isSelected={isSelected} onSelect={onSelect} tone="tint">
      <SectionBody width="wide">
        <div className="space-y-1.5">
          <h2 className="text-2xl sm:text-3xl" style={{fontFamily: ITEM_HEADING}}>
            {parsed.title || section.name}
          </h2>
          {(parsed.subtitle || section.description) && (
            <p className="text-sm opacity-75" style={{fontFamily: ITEM_BODY}}>
              {parsed.subtitle || section.description}
            </p>
          )}
        </div>

        {parsed.error ? (
          <ParseError message={parsed.error} />
        ) : parsed.items.length === 0 ? (
          <PasteHint label="오늘의 엽서" />
        ) : (
          <div className="space-y-3">
            <Rail label="엽서">
              {parsed.items.map((item, index) => (
                <Postcard key={`${item.line}-${index}`} item={item} />
              ))}
            </Rail>
            <p className="text-[11px] opacity-60">
              [복사] 를 누르면 문장과 해시태그가 함께 복사됩니다 · 총 {parsed.items.length}장
            </p>
          </div>
        )}
      </SectionBody>
    </SectionFrame>
  );
}