'use client';

import { motion } from 'framer-motion';
import { type LucideIcon } from 'lucide-react';
import type { ReactNode } from 'react';

interface BrandSealProps {
  text?: string;
  variant?: 'red' | 'gold' | 'blue';
  size?: 'sm' | 'md' | 'lg';
}

export function BrandSeal({ text = '旗舰', variant = 'red', size = 'md' }: BrandSealProps) {
  const sizes = {
    sm: 'w-14 h-14 text-xs',
    md: 'w-20 h-20 text-sm',
    lg: 'w-28 h-28 text-base',
  };

  const colors = {
    red: {
      border: '#C41E3A',
      bg: 'rgba(196, 30, 58, 0.06)',
      text: '#C41E3A',
      shadow: 'rgba(196, 30, 58, 0.2)',
    },
    gold: {
      border: '#d97706',
      bg: 'rgba(217, 119, 6, 0.06)',
      text: '#d97706',
      shadow: 'rgba(217, 119, 6, 0.2)',
    },
    blue: {
      border: '#2563eb',
      bg: 'rgba(37, 99, 235, 0.06)',
      text: '#2563eb',
      shadow: 'rgba(37, 99, 235, 0.2)',
    },
  };

  const color = colors[variant];

  return (
    <motion.div
      initial={{ opacity: 0, scale: 0.5, rotate: -15 }}
      whileInView={{ opacity: 1, scale: 1, rotate: -12 }}
      viewport={{ once: true }}
      transition={{
        duration: 0.8,
        delay: 0.5,
        ease: [0.34, 1.56, 0.64, 1] as const,
      }}
      className={`relative ${sizes[size]} flex items-center justify-center rounded-lg border-2 font-bold select-none`}
      style={{
        borderColor: color.border,
        backgroundColor: color.bg,
        color: color.text,
        boxShadow: `0 4px 16px ${color.shadow}`,
        fontFamily: "'Noto Serif SC', serif",
      }}
    >
      <div className="absolute inset-[4px] border border-current opacity-20 rounded-md" />
      <span
        className="relative z-10 tracking-widest"
        style={{ writingMode: 'vertical-rl' }}
      >
        {text}
      </span>
      <div
        className="absolute inset-0 rounded-lg opacity-0 hover:opacity-100 transition-opacity duration-500"
        style={{
          background: `conic-gradient(from 0deg, transparent 0%, ${color.border}10 50%, transparent 100%)`,
          animation: 'rotate 8s linear infinite',
        }}
      />
    </motion.div>
  );
}

interface CalligraphyTextProps {
  children: ReactNode;
  className?: string;
  as?: 'h1' | 'h2' | 'h3' | 'span';
}

export function CalligraphyText({
  children,
  className = '',
  as: Tag = 'span',
}: CalligraphyTextProps) {
  return (
    <Tag
      className={`font-calligraphy ${className}`}
      style={{
        fontFamily: "'Noto Serif SC', 'STKaiti', 'KaiTi', serif",
        fontWeight: 700,
      }}
    >
      {children}
    </Tag>
  );
}

interface InkDividerProps {
  variant?: 'subtle' | 'bold' | 'decorative';
}

export function InkDivider({ variant = 'subtle' }: InkDividerProps) {
  if (variant === 'subtle') {
    return (
      <div className="flex items-center justify-center gap-4 py-6">
        <div className="flex-1 h-px bg-gradient-to-r from-transparent via-gray-200 to-transparent" />
        <div className="w-2 h-2 rounded-full bg-gray-300" />
        <div className="flex-1 h-px bg-gradient-to-r from-transparent via-gray-200 to-transparent" />
      </div>
    );
  }

  if (variant === 'bold') {
    return (
      <div className="flex items-center gap-6 py-8">
        <div className="flex-1 h-0.5 bg-gradient-to-r from-transparent via-gray-300 to-[#C41E3A]" />
        <BrandSeal size="sm" variant="red" text="墨" />
        <div className="flex-1 h-0.5 bg-gradient-to-l from-transparent via-gray-300 to-[#C41E3A]" />
      </div>
    );
  }

  return (
    <div className="flex items-center justify-center py-8">
      <svg width="200" height="24" viewBox="0 0 200 24" fill="none" className="opacity-40">
        <path
          d="M0 12 Q 50 4, 100 12 T 200 12"
          stroke="#C41E3A"
          strokeWidth="1"
          fill="none"
          vectorEffect="non-scaling-stroke"
        />
        <circle cx="100" cy="12" r="3" fill="#C41E3A" opacity="0.6" />
        <circle cx="60" cy="9" r="1.5" fill="#C41E3A" opacity="0.3" />
        <circle cx="140" cy="15" r="1.5" fill="#C41E3A" opacity="0.3" />
      </svg>
    </div>
  );
}

interface SectionHeaderProps {
  badge?: string;
  title: ReactNode;
  subtitle?: string;
  align?: 'left' | 'center';
  icon?: LucideIcon;
}

export function SectionHeader({
  badge,
  title,
  subtitle,
  align = 'center',
  icon: Icon,
}: SectionHeaderProps) {
  return (
    <motion.div
      initial={{ opacity: 0, y: 28 }}
      whileInView={{ opacity: 1, y: 0 }}
      viewport={{ once: true, margin: '-80px' }}
      transition={{ duration: 0.75, ease: [0.22, 1, 0.36, 1] as const }}
      className={`mb-16 ${align === 'center' ? 'text-center max-w-3xl mx-auto' : ''}`}
    >
      {(badge || Icon) && (
        <div className={`inline-flex items-center gap-2 px-4 py-1.5 rounded-full bg-red-50 text-[#C41E3A] text-sm font-bold tracking-wider uppercase mb-5 ${
          align === 'center' ? '' : ''
        }`}>
          {Icon && <Icon className="w-4 h-4" />}
          {badge}
        </div>
      )}

      <h2 className="text-3xl md:text-4xl lg:text-5xl font-bold tracking-tight text-gray-900 mb-4">
        {title}
      </h2>

      {subtitle && (
        <p className="text-lg text-gray-600 leading-relaxed">{subtitle}</p>
      )}
    </motion.div>
  );
}