'use client';

import { useRef } from 'react';
import { motion, useMotionTemplate, useMotionValue } from 'framer-motion';
import { useLocale } from '@/lib/i18n/locale-context';
import { SectionHeader } from '@/components/ui/SectionHeader';
import { cn } from '@/lib/utils';
import { ServiceIcon, type ServiceIconKind } from './ServiceIcon';

const FA_DIGITS = ['۰', '۱', '۲', '۳', '۴', '۵', '۶', '۷', '۸', '۹'] as const;
function num(n: number, locale: 'fa' | 'en') {
  const str = n.toString().padStart(2, '0');
  return locale === 'fa'
    ? str.replace(/\d/g, (d) => FA_DIGITS[Number(d)])
    : str;
}

const COLOR_MAP: Record<
  string,
  { text: string; ring: string; glow: string; chip: string }
> = {
  electric: {
    text: 'text-electric',
    ring: 'group-hover:border-electric/50',
    glow: 'group-hover:shadow-glow-electric',
    chip: 'border-electric/30 bg-electric/5 text-electric/90',
  },
  violet: {
    text: 'text-violet',
    ring: 'group-hover:border-violet/50',
    glow: 'group-hover:shadow-glow-violet',
    chip: 'border-violet/30 bg-violet/5 text-violet/90',
  },
  magenta: {
    text: 'text-magenta',
    ring: 'group-hover:border-magenta/50',
    glow: 'group-hover:shadow-glow-magenta',
    chip: 'border-magenta/30 bg-magenta/5 text-magenta/90',
  },
  emerald: {
    text: 'text-emerald',
    ring: 'group-hover:border-emerald/50',
    glow: 'group-hover:shadow-glow-emerald',
    chip: 'border-emerald/30 bg-emerald/5 text-emerald/90',
  },
  cyan: {
    text: 'text-cyan',
    ring: 'group-hover:border-cyan/50',
    glow: 'group-hover:shadow-glow-electric',
    chip: 'border-cyan/30 bg-cyan/5 text-cyan/90',
  },
};

export function Services() {
  const { t, locale } = useLocale();

  return (
    <section id="services" className="relative px-5 py-28 sm:px-8">
      <div className="mx-auto max-w-7xl">
        <SectionHeader
          eyebrow={t.services.eyebrow}
          title={t.services.title}
          sub={t.services.sub}
        />

        <div className="mt-14 grid grid-cols-1 gap-5 sm:grid-cols-2 lg:grid-cols-3">
          {t.services.items.map((item, i) => (
            <ServiceCard
              key={item.id}
              index={i}
              numLabel={num(i + 1, locale)}
              title={item.title}
              description={item.description}
              tags={item.tags}
              color={item.color}
              iconKind={item.id as ServiceIconKind}
              href={`/services/${item.id}`}
              locale={locale}
            />
          ))}
        </div>
      </div>
    </section>
  );
}

function ServiceCard({
  index,
  numLabel,
  title,
  description,
  tags,
  color,
  iconKind,
  href,
  locale,
}: {
  index: number;
  numLabel: string;
  title: string;
  description: string;
  tags: readonly string[];
  color: string;
  iconKind: ServiceIconKind;
  href: string;
  locale: 'fa' | 'en';
}) {
  const ref = useRef<HTMLDivElement>(null);
  const mx = useMotionValue(50);
  const my = useMotionValue(50);
  const rotateX = useMotionValue(0);
  const rotateY = useMotionValue(0);

  // Subtle 3D tilt on pointer move — keeps the card "alive" without
  // forcing GPU work when the cursor isn't over it.
  const onPointerMove = (e: React.PointerEvent<HTMLDivElement>) => {
    const el = ref.current;
    if (!el) return;
    const r = el.getBoundingClientRect();
    const x = (e.clientX - r.left) / r.width;
    const y = (e.clientY - r.top) / r.height;
    mx.set(x * 100);
    my.set(y * 100);
    rotateY.set((x - 0.5) * 8);
    rotateX.set((0.5 - y) * 8);
  };
  const onPointerLeave = () => {
    rotateX.set(0);
    rotateY.set(0);
  };

  const spotlight = useMotionTemplate`radial-gradient(220px circle at ${mx}% ${my}%, rgba(255,255,255,0.08), transparent 60%)`;

  const c = COLOR_MAP[color] ?? COLOR_MAP.electric;

  return (
    <motion.article
      ref={ref}
      onPointerMove={onPointerMove}
      onPointerLeave={onPointerLeave}
      style={{
        rotateX,
        rotateY,
        transformStyle: 'preserve-3d',
        transformPerspective: 1000,
      }}
      initial={{ opacity: 0, y: 30 }}
      whileInView={{ opacity: 1, y: 0 }}
      viewport={{ once: true, margin: '-60px' }}
      transition={{
        duration: 0.6,
        ease: [0.22, 1, 0.36, 1],
        delay: 0.05 * index,
      }}
      className={cn(
        'group relative isolate overflow-hidden p-6 sm:p-7',
        'glass transition-all duration-300',
        c.ring,
        c.glow,
      )}
    >
      {/* Spotlight */}
      <motion.div
        aria-hidden
        style={{ background: spotlight }}
        className="pointer-events-none absolute inset-0 opacity-0 transition-opacity duration-300 group-hover:opacity-100"
      />

      {/* Number + icon row */}
      <div className="relative flex items-start justify-between">
        <span
          className={cn(
            'font-mono text-[0.78rem] tracking-[0.18em] text-slate-500',
            locale === 'fa' && 'fa-nums',
          )}
        >
          {numLabel}
        </span>
        <span className={cn('transition-colors duration-300', c.text)}>
          <ServiceIcon kind={iconKind} className="h-7 w-7" />
        </span>
      </div>

      {/* Title */}
      <h3
        className={cn(
          'relative mt-6 font-display text-[clamp(1.15rem,1.8vw,1.4rem)] font-semibold leading-snug text-white',
          locale === 'fa' && 'font-fa',
        )}
      >
        {title}
      </h3>

      {/* Description */}
      <p className="relative mt-3 text-[0.94rem] leading-relaxed text-slate-400">
        {description}
      </p>

      {/* Tags */}
      <div className="relative mt-5 flex flex-wrap gap-1.5">
        {tags.map((tag) => (
          <span
            key={tag}
            className={cn(
              'rounded-full border px-2.5 py-0.5 font-mono text-[0.65rem] uppercase tracking-wider',
              c.chip,
            )}
          >
            {tag}
          </span>
        ))}
      </div>

      {/* Hairline */}
      <span
        aria-hidden
        className="absolute inset-x-6 bottom-0 h-px bg-gradient-to-r from-transparent via-white/10 to-transparent"
      />
    </motion.article>
  );
}