"use client";

import { useState } from "react";
import Link from "next/link";
import { Puzzle, ChevronRight, Search, X } from "lucide-react";
import { useSkills } from "@/lib/hooks";
import type { SkillSummary } from "@/lib/types";

export default function SkillsPage() {
  const { data, isLoading } = useSkills();
  const [search, setSearch] = useState("");

  const skills = data?.skills || [];
  const categories = [...new Set(skills.map((s) => s.category || "uncategorized"))].sort();

  const filtered = search
    ? skills.filter(
        (s) =>
          s.name.toLowerCase().includes(search.toLowerCase()) ||
          s.description.toLowerCase().includes(search.toLowerCase())
      )
    : skills;

  const grouped = categories
    .map((cat) => ({
      category: cat,
      skills: filtered.filter((s) => (s.category || "uncategorized") === cat),
    }))
    .filter((g) => g.skills.length > 0);

  return (
    <div className="space-y-4">
      <div className="flex items-center gap-2">
        <Puzzle size={20} style={{ color: "#a78bfa" }} />
        <h1 className="text-xl font-bold" style={{ color: "#a78bfa" }}>Skills</h1>
        <span className="text-xs text-zinc-500 ml-auto">{skills.length} total</span>
      </div>

      <div className="relative">
        <Search size={16} className="absolute left-3 top-1/2 -translate-y-1/2 text-zinc-500" />
        <input
          type="text"
          value={search}
          onChange={(e) => setSearch(e.target.value)}
          placeholder="Filter skills..."
          className="w-full pl-9 pr-9 py-2.5 rounded-xl text-sm bg-white/[0.04] border border-white/[0.08] text-zinc-200 placeholder-zinc-600 outline-none focus:border-white/[0.15] transition-colors"
        />
        {search && (
          <button
            onClick={() => setSearch("")}
            className="absolute right-3 top-1/2 -translate-y-1/2 text-zinc-500"
          >
            <X size={16} />
          </button>
        )}
      </div>

      {isLoading ? (
        <div className="space-y-3">
          {[...Array(5)].map((_, i) => (
            <div key={i} className="glass p-4 animate-pulse">
              <div className="h-4 bg-white/[0.06] rounded w-3/4 mb-2" />
              <div className="h-3 bg-white/[0.06] rounded w-1/2" />
            </div>
          ))}
        </div>
      ) : (
        <div className="space-y-5">
          {grouped.map(({ category, skills }) => (
            <div key={category}>
              <h2 className="text-xs font-medium text-zinc-500 uppercase tracking-wider mb-2 px-1">
                {category}
              </h2>
              <div className="space-y-1.5">
                {skills.map((s) => (
                  <SkillRow key={s.name} skill={s} />
                ))}
              </div>
            </div>
          ))}
          {grouped.length === 0 && (
            <div className="glass p-6 text-center text-sm text-zinc-500">
              No skills match &ldquo;{search}&rdquo;
            </div>
          )}
        </div>
      )}
    </div>
  );
}

function SkillRow({ skill }: { skill: SkillSummary }) {
  return (
    <Link href={`/skills/${skill.name}`}>
      <div className="glass glass-hover p-3 flex items-center gap-3 transition-all">
        <div className="flex-1 min-w-0">
          <div className="text-sm font-medium text-zinc-200">{skill.name}</div>
          <div className="text-xs text-zinc-500 line-clamp-1">{skill.description}</div>
        </div>
        <ChevronRight size={16} className="text-zinc-600 shrink-0" />
      </div>
    </Link>
  );
}