"use client";

import { useId, type CSSProperties, type ElementType, type ReactNode } from "react";
import { motion, useReducedMotion } from "motion/react";

export type TeamGridMember = {
  name: string;
  role: string;
  /** Picture URL. Without one the card shows the initials. */
  photo?: string;
  /** Opens on hover or focus. Always open on touch screens. */
  bio?: string;
  /** Social or profile links, under the bio. */
  links?: { label: string; href: string }[];
};

type TeamGridProps = {
  members: TeamGridMember[];
  title?: string;
  /** Small line above the title. */
  eyebrow?: string;
  subtitle?: string;
  /** Goes under the grid: a hiring note or a link. */
  children?: ReactNode;
  /** Smallest card width in pixels. Sets how many fit in a row. */
  minWidth?: number;
  /** Card colour. */
  tile?: string;
  /** Card edge colour on hover. */
  color?: string;
  /** h2 by default. */
  headingAs?: ElementType;
  /** Set padding and colours here. */
  className?: string;
};

const initials = (name: string) =>
  name
    .split(/\s+/)
    .slice(0, 2)
    .map((word) => word[0])
    .join("")
    .toUpperCase();

/* TeamGrid: people cards that rise in on scroll. Hover or focus a card and its bio opens while the others dim. On touch screens the bios stay open. */
export function TeamGrid({
  members,
  title,
  eyebrow,
  subtitle,
  children,
  minWidth = 210,
  tile = "#15122a",
  color = "#a78bfa",
  headingAs: Heading = "h2",
  className = "bg-[#0b0a14] px-5 py-16 text-white",
}: TeamGridProps) {
  const reduce = useReducedMotion();
  const id = useId();

  return (
    <section aria-labelledby={title ? id : undefined} className={`@container ${className}`}>
      {title && (
        <header className="mx-auto mb-8 max-w-2xl text-center">
          {eyebrow && <p className="mb-2 text-xs font-medium tracking-[0.2em] uppercase opacity-70">{eyebrow}</p>}
          <Heading id={id} className="text-[clamp(1.5rem,6cqw,2.5rem)] leading-tight font-semibold tracking-tight text-balance">
            {title}
          </Heading>
          {subtitle && <p className="mt-3 text-pretty opacity-70">{subtitle}</p>}
        </header>
      )}
      <ul
        className="mx-auto grid max-w-6xl items-start gap-3 @3xl:gap-4"
        style={{ gridTemplateColumns: `repeat(auto-fit, minmax(min(${minWidth}px, 100%), 1fr))` }}
      >
        {members.map((member, i) => (
          <motion.li
            key={member.name}
            initial={reduce ? { opacity: 0 } : { opacity: 0, y: 20 }}
            whileInView={reduce ? { opacity: 1 } : { opacity: 1, y: 0 }}
            viewport={{ once: true, amount: 0.15 }}
            transition={{ duration: 0.6, delay: Math.min(i, 6) * 0.06, ease: [0.16, 1, 0.3, 1] }}
          >
            <article
              tabIndex={member.bio && !member.links?.length ? 0 : undefined}
              className="group/card overflow-hidden rounded-2xl border border-current/10 outline-offset-2 transition-[border-color,box-shadow,opacity] duration-300 hover:border-[var(--tg-edge)] hover:shadow-[0_18px_40px_-24px_var(--tg-edge)] focus-within:border-[var(--tg-edge)] [ul:has(article:hover)_&:not(:hover)]:opacity-55"
              style={{ backgroundColor: tile, "--tg-edge": color } as CSSProperties}
            >
              <div className="relative grid aspect-[5/4] place-items-center overflow-hidden" style={{ background: `linear-gradient(150deg, ${color}40, transparent 70%)` }}>
                {member.photo ? (
                  <img
                    src={member.photo}
                    alt=""
                    className="absolute inset-0 size-full object-cover transition-transform duration-500 ease-out group-hover/card:scale-105 motion-reduce:transition-none motion-reduce:group-hover/card:scale-100"
                  />
                ) : (
                  <span aria-hidden className="text-4xl font-semibold tracking-tight opacity-80">
                    {initials(member.name)}
                  </span>
                )}
              </div>
              <div className="p-4">
                <h3 className="font-semibold">{member.name}</h3>
                <p className="text-sm opacity-70">{member.role}</p>
                {(member.bio || member.links?.length) && (
                  <div className="grid grid-rows-[0fr] transition-[grid-template-rows] duration-300 ease-out group-focus-within/card:grid-rows-[1fr] group-hover/card:grid-rows-[1fr] pointer-coarse:grid-rows-[1fr] motion-reduce:transition-none">
                    <div className="min-h-0 overflow-hidden">
                      {member.bio && <p className="pt-3 text-sm text-pretty opacity-80">{member.bio}</p>}
                      {member.links && member.links.length > 0 && (
                        <ul className="flex flex-wrap gap-x-3 gap-y-1 pt-3 text-sm">
                          {member.links.map((link) => (
                            <li key={link.label}>
                              <a href={link.href} className="underline underline-offset-2" style={{ color }} aria-label={`${member.name}: ${link.label}`}>
                                {link.label}
                              </a>
                            </li>
                          ))}
                        </ul>
                      )}
                    </div>
                  </div>
                )}
              </div>
            </article>
          </motion.li>
        ))}
      </ul>
      {children && <div className="mx-auto mt-8 max-w-6xl text-center">{children}</div>}
    </section>
  );
}