"use client";

import Link from "next/link";
import { useMemo, useState } from "react";
import { ArrowRight, BookOpen, CheckCircle2, ChevronDown, Gamepad2, Lock, Play, Search, Sparkles, Users } from "lucide-react";
import { Brand } from "./Brand";
import { ReplicaSafetyNotice } from "./ReplicaSafetyNotice";

const courses = [
  { slug: "systems-thinking", title: "Systems Thinking for Product Teams", author: "Nadia Alvarez", level: "Intermediate", time: "1h 42m", type: "Course", software: "Miro" },
  { slug: "excel-modeling", title: "Excel Modeling for Operators", author: "Daniel Kim", level: "Beginner", time: "58m", type: "Course", software: "Excel" },
  { slug: "ai-evaluation", title: "Practical AI Evaluation", author: "Priya Raman", level: "Advanced", time: "2h 15m", type: "Learning Path", software: "Python" },
  { slug: "leadership-rituals", title: "Leadership Rituals for Hybrid Teams", author: "Maya Chen", level: "Intermediate", time: "47m", type: "Course", software: "Notion" },
];

const filterOptions: Record<string, string[]> = {
  "Best match": ["Best match", "Newest", "Most popular", "Recently updated"],
  Difficulty: ["Beginner", "Intermediate", "Advanced"],
  Type: ["Course", "Learning Path", "Video", "Certificate"],
  "Completion time": ["Under 30m", "30m-2h", "2h-5h", "5h+"],
  Software: ["Excel", "Python", "Miro", "Notion", "Figma"],
};

const articles = [
  { slug: "career-capital", category: "Career", title: "Career capital is built in boring weekly rituals", author: "Elena Torres", read: "6 min read" },
  { slug: "manager-readme", category: "Leadership", title: "The manager readme is due for a redesign", author: "Andre Wallace", read: "8 min read" },
  { slug: "ai-checklists", category: "Technology", title: "AI checklists work when they name failure modes", author: "Priya Raman", read: "5 min read" },
];

const games = [
  { slug: "logic-grid", title: "Logic Grid", body: "Place five signals into the right operating pattern.", stat: "5 min" },
  { slug: "word-link", title: "Word Link", body: "Connect adjacent work terms before the clock runs down.", stat: "Daily" },
  { slug: "priority-stack", title: "Priority Stack", body: "Sort competing priorities by urgency and impact.", stat: "3 rounds" },
];

export function PublicHeader() {
  return (
    <header className="public-header public-header-compact">
      <Brand />
      <nav>
        <Link prefetch={false} href="/jobs">Jobs</Link>
        <Link prefetch={false} href="/learning">Learning</Link>
        <Link prefetch={false} href="/top-content">Top Content</Link>
        <Link prefetch={false} href="/games">Games</Link>
        <Link prefetch={false} href="/login">Sign in</Link>
        <Link prefetch={false} className="button button-outline" href="/register">Join LinkedIn</Link>
      </nav>
    </header>
  );
}

export function LearningView() {
  const [query, setQuery] = useState("");
  const [openFilter, setOpenFilter] = useState<string | null>(null);
  const filtered = useMemo(() => {
    const normalized = query.toLowerCase();
    return courses.filter((course) => !normalized || `${course.title} ${course.author} ${course.software}`.toLowerCase().includes(normalized));
  }, [query]);

  return (
    <div className="public-subpage">
      <PublicHeader />
      <main className="learning-page">
        <section className="public-page-hero">
          <p className="eyebrow-dark">LinkedIn Learning</p>
          <h1>Learn practical skills from working professionals</h1>
          <form className="learning-search" onSubmit={(event) => event.preventDefault()}>
            <Search size={20} />
            <input value={query} onChange={(event) => setQuery(event.target.value)} placeholder="Search skills, software, or instructors" />
            <button className="button button-primary">Search</button>
          </form>
        </section>
        <div className="learning-filter-row">
          {Object.keys(filterOptions).map((filter) => (
            <div className="learning-filter" key={filter}>
              <button className={`filter-pill ${openFilter === filter ? "active" : ""}`} type="button" onClick={() => setOpenFilter(openFilter === filter ? null : filter)}>
                {filter} <ChevronDown size={16} />
              </button>
              {openFilter === filter && (
                <div className="learning-filter-menu">
                  {filterOptions[filter].map((option) => <button type="button" key={option}>{option}</button>)}
                </div>
              )}
            </div>
          ))}
        </div>
        <section className="course-grid">
          {filtered.map((course) => (
            <Link prefetch={false} className="course-card" href={`/learning/${course.slug}`} key={course.slug}>
              <div><BookOpen size={30} /><span>{course.software}</span></div>
              <h2>{course.title}</h2>
              <p>{course.author}</p>
              <small>{course.level} · {course.time} · {course.type}</small>
            </Link>
          ))}
        </section>
      </main>
    </div>
  );
}

export function LearningCourseDetail({ slug }: { slug: string }) {
  const course = courses.find((item) => item.slug === slug) ?? courses[0];
  return (
    <div className="public-subpage">
      <PublicHeader />
      <main className="course-detail-page">
        <section className="surface course-detail-hero">
          <div>
            <p className="eyebrow-dark">Course</p>
            <h1>{course.title}</h1>
            <p>With {course.author} · {course.level} · {course.time}</p>
            <div className="hero-actions">
              <button className="button button-primary"><Play size={17} /> Start free month</button>
              <Link prefetch={false} className="button button-outline" href="/register">Join now</Link>
              <Link prefetch={false} className="button button-quiet" href="/login">Sign in</Link>
            </div>
          </div>
          <div className="course-video-preview"><Play size={42} /><span>Preview lesson</span></div>
        </section>
        <section className="course-detail-grid">
          <article className="surface"><h2>What you will learn</h2><p>Translate ambiguous work into clear decisions, use repeatable frameworks, and document the tradeoffs that matter.</p></article>
          <article className="surface"><h2>Skills covered</h2><p>Product thinking · Collaboration · Decision quality · Operating cadence</p></article>
          <article className="surface"><h2>For teams</h2><p>Buy a team plan to assign courses, track progress, and build shared practice rituals.</p><button className="button button-outline">Buy for my team</button></article>
        </section>
      </main>
    </div>
  );
}

export function TopContentView({ slug }: { slug?: string }) {
  const selected = articles.find((item) => item.slug === slug);
  return (
    <div className="public-subpage">
      <PublicHeader />
      <main className="top-content-page">
        <section className="public-page-hero">
          <p className="eyebrow-dark">Top Content</p>
          <h1>Ideas professionals are reading now</h1>
          <div className="content-tabs"><Link prefetch={false} href="/top-content">All</Link><Link prefetch={false} href="/top-content?category=career">Career</Link><Link prefetch={false} href="/top-content?category=leadership">Leadership</Link><Link prefetch={false} href="/top-content?category=technology">Technology</Link></div>
        </section>
        {selected ? (
          <article className="surface content-detail">
            <span>{selected.category} · Editor pick</span>
            <h2>{selected.title}</h2>
            <p><b>{selected.author}</b> · {selected.read}</p>
            <div className="ai-summary"><Sparkles size={20} /><p>AI summary: this piece argues for clearer weekly rituals, narrower decision records, and professional networks that reward useful specificity.</p></div>
            <p>Professional growth usually looks quieter than people expect. The strongest operators build durable habits around writing, feedback, and asking sharper questions before the meeting starts.</p>
          </article>
        ) : (
          <section className="content-grid">
            {articles.map((article) => <Link prefetch={false} className="surface content-card" href={`/top-content/${article.slug}`} key={article.slug}><span>{article.category}</span><h2>{article.title}</h2><p>{article.author} · {article.read}</p><ArrowRight size={18} /></Link>)}
          </section>
        )}
      </main>
    </div>
  );
}

function GamesExperience({ slug }: { slug?: string }) {
  const [started, setStarted] = useState(false);
  const selected = games.find((item) => item.slug === slug);
  return (
    <main className="games-page">
        <section className="public-page-hero">
          <p className="eyebrow-dark">LinkedIn Games</p>
          <h1>Short daily challenges for professional pattern matching</h1>
        </section>
        {selected ? (
          <section className="surface game-detail">
            <Link prefetch={false} href="/games">Back to games</Link>
            <Gamepad2 size={46} />
            <h2>{selected.title}</h2>
            <p>{selected.body}</p>
            <button className="button button-primary" onClick={() => setStarted(true)}>{started ? <><CheckCircle2 size={18} /> Round started</> : "Start game"}</button>
            {started && <div className="game-board"><span>Signal</span><span>Constraint</span><span>Decision</span><span>Result</span></div>}
          </section>
        ) : (
          <section className="game-grid">
            {games.map((game) => <Link prefetch={false} className="surface game-card" href={`/games/${game.slug}`} key={game.slug}><Gamepad2 size={34} /><h2>{game.title}</h2><p>{game.body}</p><span>{game.stat}</span></Link>)}
          </section>
        )}
    </main>
  );
}

export function GamesView({ slug }: { slug?: string }) {
  return <div className="public-subpage"><PublicHeader /><GamesExperience slug={slug} /></div>;
}

export function MemberGamesView({ slug }: { slug?: string }) {
  return <GamesExperience slug={slug} />;
}

const directoryContent: Record<string, { title: string; body: string; items: Array<{ title: string; detail: string }> }> = {
  groups: { title: "Groups", body: "Join professional communities around the work you care about.", items: [
    { title: "Product Design Leaders", detail: "128K members · Active daily" },
    { title: "Responsible AI Practitioners", detail: "84K members · 12 new discussions" },
    { title: "Climate Technology Network", detail: "41K members · 5 events this month" },
  ] },
  events: { title: "Events", body: "Learn with your network in live and recorded sessions.", items: [
    { title: "Designing useful AI evaluations", detail: "Tomorrow · Online" },
    { title: "Platform leadership roundtable", detail: "Friday · Online" },
    { title: "Climate tech operator meetup", detail: "Aug 22 · San Francisco" },
  ] },
  newsletters: { title: "Newsletters", body: "Follow recurring ideas from people and teams in your network.", items: [
    { title: "The Practical Operator", detail: "Weekly · 92K subscribers" },
    { title: "Responsible AI Review", detail: "Twice monthly · 48K subscribers" },
    { title: "Design Systems Fieldnotes", detail: "Monthly · 37K subscribers" },
  ] },
};

export function MemberDirectoryView({ kind }: { kind: string }) {
  const content = directoryContent[kind] ?? directoryContent.groups;
  return <main className="member-directory-page">
    <section className="surface member-directory-hero"><h1>{content.title}</h1><p>{content.body}</p></section>
    <section className="member-directory-grid">{content.items.map((item) => <article className="surface" key={item.title}><h2>{item.title}</h2><p>{item.detail}</p><button className="button button-outline" type="button">{kind === "events" ? "View event" : kind === "newsletters" ? "Subscribe" : "View group"}</button></article>)}</section>
  </main>;
}

export function AuthWallView({ kind }: { kind: string }) {
  const label = kind.replace(/-/g, " ");
  return (
    <div className="authwall-page">
      <PublicHeader />
      <main className="authwall-card">
        <Lock size={38} />
        <h1>Join LinkedIn to continue</h1>
        <p>The public {label} directory is protected so member profiles, posts, and article activity stay inside the local LinkedIn experience.</p>
        <ReplicaSafetyNotice className="authwall-safety-notice" />
        <div className="authwall-form authwall-safe-actions">
          <Link prefetch={false} className="button button-primary button-full" href="/register">Create account</Link>
          <Link prefetch={false} className="button button-outline button-full" href="/login">Sign in</Link>
        </div>
        <div className="authwall-actions">
          <span><Users size={17} /> Your account is protected with email verification.</span>
        </div>
      </main>
    </div>
  );
}