"use client"

// Hjelpeside (ADR-094) -- oversiktside for turneringsflyten + søkbar FAQ.
// Innholdet ligger i messages/{nb,en}.json under "help" (t.raw(), siden
// dette er strukturert innhold -- arrays av {title,body}/{question,answer}
// -- ikke enkeltstrenger). Startet med to konkrete spørsmål brukeren
// faktisk stilte i en samtale ("hvordan fungerer turneringsmodulen" /
// "hvordan legger jeg til spillere i spillerpoolen") -- ment å vokse
// organisk etter hvert som flere spørsmål dukker opp, samme mønster som
// resten av appen er bygget etter denne økten.
import { useState } from "react"
import Link from "next/link"
import { useTranslations } from "next-intl"
import { ArrowLeft, Search } from "lucide-react"

type OverviewSection = { title: string; body: string }
type FaqEntry = { question: string; answer: string }

export function HelpPage() {
  const t = useTranslations("help")
  const [query, setQuery] = useState("")

  const sections = t.raw("overview.sections") as OverviewSection[]
  const faq = t.raw("faq") as FaqEntry[]

  const filteredFaq =
    query.trim() === ""
      ? faq
      : faq.filter(
          (entry) =>
            entry.question.toLowerCase().includes(query.toLowerCase()) ||
            entry.answer.toLowerCase().includes(query.toLowerCase()),
        )

  return (
    <div className="flex min-h-[100dvh] flex-col bg-background">
      <header className="sticky top-0 z-10 border-b border-border bg-background/90 pt-[env(safe-area-inset-top)] backdrop-blur">
        <div className="mx-auto flex w-full max-w-2xl items-center gap-3 px-5 py-4">
          <Link
            href="/more"
            aria-label={t("backLabel")}
            className="flex size-11 shrink-0 items-center justify-center rounded-xl border border-border bg-card text-muted-foreground transition-colors hover:bg-accent/50 hover:text-foreground"
          >
            <ArrowLeft aria-hidden="true" className="size-5" />
          </Link>
          <h1 className="text-xl font-extrabold tracking-tight text-foreground">{t("pageTitle")}</h1>
        </div>
      </header>

      <main className="mx-auto w-full max-w-2xl flex-1 px-5 py-6 sm:py-8">
        <section className="flex flex-col gap-4 rounded-2xl border border-border bg-card p-5 shadow-md shadow-black/8 sm:p-6">
          <div className="flex flex-col gap-1">
            <h2 className="text-lg font-bold text-foreground">{t("overview.title")}</h2>
            <p className="text-sm leading-relaxed text-muted-foreground text-pretty">{t("overview.intro")}</p>
          </div>
          <div className="flex flex-col gap-4">
            {sections.map((section, i) => (
              <div key={i} className="flex flex-col gap-1">
                <h3 className="text-base font-bold text-foreground">{section.title}</h3>
                <p className="text-sm leading-relaxed text-muted-foreground text-pretty">{section.body}</p>
              </div>
            ))}
          </div>
        </section>

        <section className="mt-6 flex flex-col gap-3">
          <div className="relative">
            <Search
              aria-hidden="true"
              className="pointer-events-none absolute left-3 top-1/2 size-5 -translate-y-1/2 text-muted-foreground"
            />
            <input
              type="search"
              value={query}
              onChange={(e) => setQuery(e.target.value)}
              placeholder={t("searchPlaceholder")}
              aria-label={t("searchLabel")}
              className="h-11 w-full rounded-xl border border-border bg-card pl-11 pr-3 text-base text-foreground shadow-sm transition-colors placeholder:text-muted-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-2 focus-visible:ring-offset-background"
            />
          </div>

          <div className="flex flex-col divide-y divide-border overflow-hidden rounded-2xl border border-border bg-card shadow-md shadow-black/8">
            {filteredFaq.length === 0 && (
              <p className="p-5 text-center text-sm text-muted-foreground">{t("noResults")}</p>
            )}
            {filteredFaq.map((entry, i) => (
              <details key={i} className="group p-4 sm:p-5">
                <summary className="cursor-pointer list-none text-base font-bold text-foreground marker:content-none">
                  {entry.question}
                </summary>
                <p className="mt-2 text-sm leading-relaxed text-muted-foreground text-pretty">{entry.answer}</p>
              </details>
            ))}
          </div>
        </section>
      </main>
    </div>
  )
}