"use client";

import { useMemo, useState } from "react";
import Link from "next/link";
import { ArrowRight, Sparkles, Zap, ShieldCheck, Languages, FileText, Image as ImageIcon, PenLine, FolderCog, LayoutGrid } from "lucide-react";
import { useApp } from "@/components/app-context";
import { categories, popularTools, toolsByCat } from "@/data/tools";
import type { CatId, Tool } from "@/data/tools";

/* ---------------- category cards with illustrations ---------------- */
export function CategoryCards({ onPick }: { onPick: (cat: CatId) => void }) {
  const { lang, T } = useApp();
  return (
    <section aria-label="Tool categories" className="mx-auto -mt-2 max-w-7xl px-4 pb-8 pt-2 sm:px-6">
      <h2 className="mb-6 text-center text-[22px] font-extrabold tracking-tight text-zinc-950 dark:text-white sm:text-[26px]">{T("toolGroups")}</h2>
      <div className="grid grid-cols-1 gap-4 sm:grid-cols-2 xl:grid-cols-4">
        {categories.map((cat) => (
          <button
            key={cat.id}
            onClick={() => onPick(cat.id)}
            className="group rounded-2xl border border-zinc-100 bg-white p-5 text-left shadow-[0_8px_30px_-12px_rgba(15,80,50,0.12)] transition-all hover:-translate-y-0.5 hover:shadow-[0_16px_40px_-12px_rgba(15,80,50,0.22)] dark:border-white/10 dark:bg-[#12201a]"
          >
            <div className="flex items-start justify-between">
              <div className="flex items-center gap-3">
                <span className={`flex h-10 w-10 items-center justify-center rounded-xl ${cat.chip}`}>
                  <CatIcon id={cat.id} className="h-5 w-5" />
                </span>
                <div>
                  <div className="text-[17px] font-extrabold tracking-tight text-zinc-900 dark:text-white">{cat.name[lang]}</div>
                  <div className="text-[12.5px] text-zinc-500 dark:text-zinc-400">{bn(cat.count, lang)} {lang === "en" ? "tools" : "টি টুল"}</div>
                </div>
              </div>
              <span className={`flex h-8 w-8 items-center justify-center rounded-full transition-transform group-hover:translate-x-0.5 ${cat.arrow}`}>
                <ArrowRight className="h-4 w-4" />
              </span>
            </div>
            <div className={`mt-4 h-28 rounded-xl bg-gradient-to-br p-3 ${cat.panel}`}>
              <CatArt id={cat.id} />
            </div>
          </button>
        ))}
      </div>
    </section>
  );
}

export function bn(n: number, lang: string): string {
  if (lang !== "bn") return String(n);
  const digits = "০১২৩৪৫৬৭৮৯";
  return String(n).replace(/\d/g, (d) => digits[Number(d)]);
}

function CatIcon({ id, className }: { id: CatId; className?: string }) {
  const map = { pdf: FileText, image: ImageIcon, ai: PenLine, file: FolderCog };
  const Icon = map[id];
  return <Icon className={className} />;
}

function CatArt({ id }: { id: CatId }) {
  if (id === "pdf")
    return (
      <div className="relative h-full">
        <span className="absolute left-2 top-3 rounded-full bg-rose-600 px-2.5 py-1 text-[10.5px] font-bold text-white shadow-sm">Merge</span>
        <span className="absolute right-3 top-3 rounded-full bg-white px-2 py-0.5 text-[10px] font-bold text-emerald-700 shadow-sm">● Signed</span>
        <div className="absolute bottom-0 left-1/2 flex h-[86px] w-[74%] -translate-x-1/2 items-center justify-center rounded-t-lg bg-white shadow-md dark:bg-white/90">
          <span className="absolute -top-2 left-2 rounded bg-rose-500 px-1.5 py-0.5 text-[9px] font-extrabold text-white">PDF</span>
          <div className="w-full space-y-1.5 px-4">
            <div className="h-1.5 w-4/5 rounded bg-zinc-200" />
            <div className="h-1.5 w-3/5 rounded bg-zinc-200" />
            <div className="h-1.5 w-2/3 rounded bg-rose-200" />
          </div>
          <span className="absolute bottom-3 right-3 rounded-full bg-emerald-100 px-1.5 py-0.5 text-[9px] font-bold text-emerald-700">−72%</span>
        </div>
      </div>
    );
  if (id === "image")
    return (
      <div className="relative h-full">
        <span className="absolute left-3 top-3 rounded-full bg-white px-2 py-0.5 text-[10px] font-bold text-violet-700 shadow-sm">1920×1080</span>
        <span className="absolute right-3 top-3 rounded-full bg-violet-600 px-2 py-0.5 text-[10px] font-bold text-white shadow-sm">WebP</span>
        <div className="absolute bottom-0 left-1/2 flex h-[86px] w-[80%] -translate-x-1/2 gap-2">
          <div className="flex-1 rounded-t-lg bg-gradient-to-br from-violet-400 to-fuchsia-400 shadow-md" />
          <div className="flex-1 rounded-t-lg bg-gradient-to-br from-violet-300 to-indigo-300 shadow-md" />
          <div className="hidden flex-1 rounded-t-lg bg-gradient-to-br from-fuchsia-300 to-violet-200 shadow-md sm:block" />
        </div>
      </div>
    );
  if (id === "ai")
    return (
      <div className="relative h-full">
        <span className="absolute left-3 top-4 text-amber-500"><Sparkles className="h-4 w-4" /></span>
        <span className="absolute right-14 top-3 rounded-full bg-white px-2 py-0.5 text-[10px] font-bold text-amber-700 shadow-sm">Friendly</span>
        <span className="absolute right-3 top-3 rounded-full bg-amber-500 px-2 py-0.5 text-[10px] font-bold text-white shadow-sm">Formal</span>
        <div className="absolute bottom-0 left-1/2 h-[86px] w-[74%] -translate-x-1/2 space-y-2 rounded-t-lg bg-white p-4 shadow-md dark:bg-white/90">
          <div className="h-1.5 w-full rounded bg-zinc-200" />
          <div className="h-1.5 w-5/6 rounded bg-zinc-200" />
          <div className="h-1.5 w-4/6 rounded bg-amber-200" />
          <div className="h-1.5 w-3/6 rounded bg-zinc-200" />
          <span className="absolute -right-2 -top-2 flex h-7 w-7 items-center justify-center rounded-full bg-amber-500 text-white shadow"><Sparkles className="h-3.5 w-3.5" /></span>
        </div>
      </div>
    );
  return (
    <div className="relative h-full">
      <span className="absolute left-3 bottom-6 rounded-full bg-sky-600 px-2.5 py-1 text-[10px] font-bold text-white shadow-sm">.zip</span>
      <div className="absolute bottom-0 left-1/2 h-[86px] w-[58%] -translate-x-1/2 rounded-t-lg bg-white p-3 shadow-md dark:bg-white/90">
        <div className="grid grid-cols-4 gap-1.5">
          {Array.from({ length: 8 }).map((_, i) => (
            <span key={i} className={`aspect-square rounded-sm ${i % 3 === 0 ? "bg-zinc-800" : "bg-zinc-200"}`} />
          ))}
        </div>
      </div>
      <span className="absolute right-3 top-4 h-10 w-10 rounded-md bg-zinc-900 p-1 shadow-md">
        <span className="grid h-full w-full grid-cols-3 gap-[2px]">
          {Array.from({ length: 9 }).map((_, i) => (
            <span key={i} className={`rounded-[1px] ${[0, 2, 3, 5, 6, 7, 8].includes(i) ? "bg-white" : "bg-transparent"}`} />
          ))}
        </span>
      </span>
    </div>
  );
}

/* ---------------- stats bar ---------------- */
export function StatsBar() {
  const { T } = useApp();
  const items = [
    { icon: Sparkles, a: T("stat1a"), b: T("stat1b") },
    { icon: Zap, a: T("stat2a"), b: T("stat2b") },
    { icon: ShieldCheck, a: T("stat3a"), b: T("stat3b") },
    { icon: Languages, a: T("stat4a"), b: T("stat4b") },
  ];
  return (
    <section className="mx-auto max-w-7xl px-4 sm:px-6">
      <div className="grid grid-cols-2 gap-4 rounded-2xl bg-white p-5 shadow-[0_10px_40px_-15px_rgba(15,80,50,0.18)] ring-1 ring-black/5 dark:bg-[#12201a] dark:ring-white/10 sm:grid-cols-4 sm:p-6">
        {items.map((it, i) => (
          <div key={i} className="flex items-center gap-3">
            <span className="flex h-10 w-10 shrink-0 items-center justify-center rounded-full bg-emerald-50 dark:bg-emerald-500/10">
              <it.icon className="h-5 w-5 text-[#0b8a47] dark:text-emerald-400" />
            </span>
            <div className="min-w-0">
              <div className="truncate text-[15px] font-extrabold text-zinc-900 dark:text-white">{it.a}</div>
              <div className="truncate text-[12.5px] text-zinc-500 dark:text-zinc-400">{it.b}</div>
            </div>
          </div>
        ))}
      </div>
    </section>
  );
}

/* ---------------- tool explorer ---------------- */
export function ToolExplorer({ tab, setTab, onOpenTool }: { tab: CatId | "popular"; setTab: (t: CatId | "popular") => void; onOpenTool: (id: string) => void }) {
  const { T, lang } = useApp();
  const list: Tool[] = useMemo(() => (tab === "popular" ? popularTools : toolsByCat(tab)), [tab]);

  return (
    <section id="tools" className="mx-auto max-w-7xl scroll-mt-20 px-4 py-14 sm:px-6">
      <h2 className="text-center text-[30px] font-extrabold tracking-tight text-zinc-950 dark:text-white sm:text-[40px]">{T("explorerTitle")}</h2>
      <div className="mt-7 flex justify-center">
        <div className="flex max-w-full gap-1 overflow-x-auto rounded-full bg-white p-1.5 shadow-[0_8px_30px_-12px_rgba(15,80,50,0.15)] ring-1 ring-black/5 dark:bg-[#12201a] dark:ring-white/10">
          {([["popular", T("popular")], ...categories.map((c) => [c.id, c.name[lang]] as const)] as const).map(([id, label]) => (
            <button
              key={id}
              onClick={() => setTab(id as CatId | "popular")}
              className={`whitespace-nowrap rounded-full px-5 py-2.5 text-[14px] font-bold transition-all ${tab === id ? "bg-[#0b7a43] text-white shadow-sm" : "text-zinc-600 hover:bg-zinc-100 dark:text-zinc-300 dark:hover:bg-white/5"}`}
            >
              {label}
            </button>
          ))}
        </div>
      </div>

      <div className="mt-9 grid grid-cols-1 gap-4 sm:grid-cols-2 lg:grid-cols-3 xl:grid-cols-4">
        {list.map((tool) => (
          <button
            key={tool.id}
            onClick={() => onOpenTool(tool.id)}
            className="group rounded-2xl border border-zinc-100 bg-white p-5 text-left shadow-[0_6px_24px_-12px_rgba(15,80,50,0.12)] transition-all hover:-translate-y-0.5 hover:border-emerald-200 hover:shadow-[0_14px_36px_-12px_rgba(15,80,50,0.22)] dark:border-white/10 dark:bg-[#12201a] dark:hover:border-emerald-500/30"
          >
            <div className="flex items-center gap-3">
              <span className="flex h-11 w-11 items-center justify-center rounded-xl bg-emerald-50 text-emerald-700 transition-colors group-hover:bg-emerald-100 dark:bg-emerald-500/10 dark:text-emerald-400">
                <CatIcon id={tool.cat} className="h-5 w-5" />
              </span>
              <div className="min-w-0">
                <div className="truncate text-[15.5px] font-bold text-zinc-900 dark:text-white">{tool.name[lang]}</div>
                <div className="text-[12px] text-zinc-400">{categories.find((c) => c.id === tool.cat)!.name[lang]}</div>
              </div>
            </div>
            <p className="mt-3 line-clamp-2 min-h-[36px] text-[13.5px] leading-5 text-zinc-500 dark:text-zinc-400">{tool.desc[lang]}</p>
          </button>
        ))}
      </div>

      <div className="mt-10 flex justify-center">
        <Link
          href="/tools"
          className="inline-flex h-12 items-center gap-2 rounded-xl bg-[#0b7a43] px-7 text-[15px] font-bold text-white shadow-md shadow-emerald-700/20 transition-all hover:bg-[#096c3b] active:scale-[0.98]"
        >
          <LayoutGrid className="h-4.5 w-4.5" />
          {T("browseAllBtn")}
          <ArrowRight className="h-4 w-4" />
        </Link>
      </div>
    </section>
  );
}