import { useParams, Link } from 'react-router-dom';
import { useQuery, keepPreviousData } from '@tanstack/react-query';
import { motion } from 'framer-motion';
import { Calendar, ChevronRight } from 'lucide-react';
import { getSchedule } from '@/api';

// 섹션 컴포넌트들
import { YoutubeSection, XSection, VarietySection, DefaultSection, decodeHtmlEntities } from './sections';
import Birthday from './Birthday';

/**
 * 특수 일정 ID 파싱
 * @param {string} id - 일정 ID
 * @returns {object|null} { type, year, nameEn } 또는 null
 */
function parseSpecialId(id) {
  // birthday-{year}-{nameEn} 형식
  const birthdayMatch = id.match(/^birthday-(\d{4})-(.+)$/);
  if (birthdayMatch) {
    return { type: 'birthday', year: birthdayMatch[1], nameEn: birthdayMatch[2] };
  }

  // debut-{year} 형식
  const debutMatch = id.match(/^debut-(\d{4})$/);
  if (debutMatch) {
    return { type: 'debut', year: debutMatch[1] };
  }

  // anniversary-{year} 형식
  const anniversaryMatch = id.match(/^anniversary-(\d{4})$/);
  if (anniversaryMatch) {
    return { type: 'anniversary', year: anniversaryMatch[1] };
  }

  return null;
}

/**
 * PC 일정 상세 페이지
 */
function PCScheduleDetail() {
  const { id } = useParams();

  // 특수 일정 ID 체크
  const specialId = parseSpecialId(id);
  if (specialId?.type === 'birthday') {
    return <Birthday year={specialId.year} nameEn={specialId.nameEn} />;
  }

  const {
    data: schedule,
    isLoading,
    error,
  } = useQuery({
    queryKey: ['schedule', id],
    queryFn: () => getSchedule(id),
    placeholderData: keepPreviousData,
    retry: false,
  });

  if (isLoading) {
    return <div className="min-h-[calc(100vh-64px)] bg-gray-50" />;
  }

  if (error || !schedule) {
    return (
      <div className="min-h-[calc(100vh-64px)] flex items-center justify-center bg-gradient-to-br from-gray-50 to-gray-100">
        <div className="text-center px-6">
          {/* 아이콘 */}
          <motion.div
            initial={{ opacity: 0, scale: 0.5 }}
            animate={{ opacity: 1, scale: 1 }}
            transition={{ duration: 0.5, type: 'spring', stiffness: 100 }}
            className="mb-8"
          >
            <div className="w-32 h-32 mx-auto bg-gradient-to-br from-primary/10 to-primary/5 rounded-3xl flex items-center justify-center">
              <Calendar size={64} className="text-primary/40" />
            </div>
          </motion.div>

          {/* 메시지 */}
          <motion.div
            initial={{ opacity: 0, y: 20 }}
            animate={{ opacity: 1, y: 0 }}
            transition={{ delay: 0.2, duration: 0.5 }}
            className="mb-8"
          >
            <h2 className="text-2xl font-bold text-gray-800 mb-3">일정을 찾을 수 없습니다</h2>
            <p className="text-gray-500 leading-relaxed">
              요청하신 일정이 존재하지 않거나 삭제되었을 수 있습니다.
              <br />
              다른 일정을 확인해 주세요.
            </p>
          </motion.div>

          {/* 장식 요소 */}
          <motion.div
            initial={{ opacity: 0 }}
            animate={{ opacity: 1 }}
            transition={{ delay: 0.4, duration: 0.5 }}
            className="flex justify-center gap-2 mb-10"
          >
            {[...Array(5)].map((_, i) => (
              <motion.div
                key={i}
                className="w-2 h-2 rounded-full bg-primary"
                animate={{
                  y: [0, -8, 0],
                  opacity: [0.3, 1, 0.3],
                }}
                transition={{
                  duration: 1.2,
                  repeat: Infinity,
                  delay: i * 0.15,
                  ease: 'easeInOut',
                }}
              />
            ))}
          </motion.div>

          {/* 버튼들 */}
          <motion.div
            initial={{ opacity: 0, y: 20 }}
            animate={{ opacity: 1, y: 0 }}
            transition={{ delay: 0.5, duration: 0.5 }}
            className="flex justify-center gap-4"
          >
            <button
              onClick={() => window.history.back()}
              className="flex items-center gap-2 px-6 py-3 border-2 border-primary text-primary rounded-full font-medium hover:bg-primary hover:text-white transition-colors duration-200"
            >
              <ChevronRight size={18} className="rotate-180" />
              이전 페이지
            </button>
            <Link
              to="/schedule"
              className="flex items-center gap-2 px-6 py-3 bg-gradient-to-r from-primary to-primary-dark text-white rounded-full font-medium hover:shadow-lg hover:shadow-primary/30 transition-all duration-200"
            >
              <Calendar size={18} />
              일정 목록
            </Link>
          </motion.div>
        </div>
      </div>
    );
  }

  // 카테고리별 섹션 렌더링
  const categoryName = schedule.category?.name;
  const renderCategorySection = () => {
    switch (categoryName) {
      case '유튜브':
        return <YoutubeSection schedule={schedule} />;
      case 'X':
        return <XSection schedule={schedule} />;
      case '예능':
        return <VarietySection schedule={schedule} />;
      default:
        return <DefaultSection schedule={schedule} />;
    }
  };

  const isYoutube = categoryName === '유튜브';
  const isX = categoryName === 'X';
  const isVariety = categoryName === '예능';
  const hasCustomLayout = isYoutube || isX || isVariety;

  return (
    <div className="min-h-[calc(100vh-64px)] bg-gray-50">
      <div className={`${isYoutube ? 'max-w-5xl' : 'max-w-3xl'} mx-auto px-6 py-8`}>
        {/* 브레드크럼 네비게이션 */}
        <motion.div
          initial={{ opacity: 0 }}
          animate={{ opacity: 1 }}
          transition={{
            duration: 0.3,
            ease: [0.25, 0.1, 0.25, 1],
            delay: 0.1,
          }}
          className={`flex items-center gap-2 text-sm text-gray-500 mb-8 ${isX ? 'max-w-2xl mx-auto' : ''}`}
        >
          <Link to="/schedule" className="hover:text-primary transition-colors">
            일정
          </Link>
          <ChevronRight size={14} />
          <span className="hover:text-primary transition-colors" style={{ color: schedule.category?.color }}>
            {schedule.category?.name}
          </span>
          <ChevronRight size={14} />
          <span className="text-gray-700 font-medium truncate max-w-md">{decodeHtmlEntities(schedule.title)}</span>
        </motion.div>

        {/* 메인 컨텐츠 */}
        <motion.div
          initial={{ opacity: 0, y: 12 }}
          animate={{ opacity: 1, y: 0 }}
          transition={{
            duration: 0.4,
            ease: [0.25, 0.1, 0.25, 1],
            delay: 0.15,
          }}
          className={`${hasCustomLayout ? '' : 'bg-white rounded-3xl shadow-sm p-8'}`}
        >
          {renderCategorySection()}
        </motion.div>
      </div>
    </div>
  );
}

export default PCScheduleDetail;