import React, { useCallback, useEffect, useMemo, useRef, useState } from 'react';
import { Menu, X } from 'lucide-react';
import { useAuth, AuthPanel, AdminConsole } from './Auth.jsx';

const RELEASE = '0.20.0-suite';

// ---------------------------------------------------------------------------
// Routing
// ---------------------------------------------------------------------------
const NAV = [
  { id: 'home', label: 'Solution' },
  { id: 'agents', label: 'Staff' },
  { id: 'contracts', label: 'Pricing' },
  { id: 'signin', label: 'Login' },
  { id: 'booth', label: 'My Booth' },
];

const VALID_ROUTES = ['home', 'agents', 'booth', 'contracts', 'admin', 'signin'];

function useHashRoute() {
  const normalize = () => {
    const raw = window.location.hash.replace(/^#\/?/, '');
    return VALID_ROUTES.includes(raw) ? raw : 'home';
  };
  const [route, setRouteState] = useState(normalize);
  useEffect(() => {
    const onHash = () => setRouteState(normalize());
    window.addEventListener('hashchange', onHash);
    window.addEventListener('popstate', onHash);
    return () => {
      window.removeEventListener('hashchange', onHash);
      window.removeEventListener('popstate', onHash);
    };
  }, []);
  const setRoute = useCallback((next) => {
    const nextHash = `/${next}`;
    if (window.location.hash !== `#${nextHash}`) {
      window.history.pushState(null, '', `${window.location.pathname}${window.location.search}#${nextHash}`);
    }
    setRouteState(next);
  }, []);
  return [route, setRoute];
}

// ---------------------------------------------------------------------------
// Route panel copy (carried over from the 3D scene so nothing regresses)
// ---------------------------------------------------------------------------
function panelData(route) {
  const panels = {
    home: {
      title: 'Browse Agents',
      subtitle: 'Walk the tavern floor and inspect the mercenary roster.',
      rows: ['Vertical site embeds a command booth', 'Customer backend mints a scoped session', 'Agent acts through supplied skills in tinybox'],
      stats: ['12,458 sessions', '7,326 deliveries', '+23.7% usage'],
      actions: ['Inspect Roster', 'Publish Agent', 'Remote Use', 'Port Mapping', 'Run Directly'],
      tint: '#27d8ff',
    },
    agents: {
      title: 'Mercenary Staff',
      subtitle: 'Specialists with scoped tools, runtime limits, and visible feedback.',
      rows: ['Iron Tusk / site ops / 18 coin per hour', 'Velvet Hex / user consent / 14 coin per hour', 'Socket Wraith / tinybox bridge / 16 coin per hour'],
      stats: ['6 active ranks', 'SLA visible', 'skills scoped'],
      actions: ['Filter by Skill', 'Inspect Runtime', 'Hire Specialist', 'Watch Feedback', 'Swap Agent'],
      tint: '#27d8ff',
    },
    booth: {
      title: 'My Booth',
      subtitle: 'Mount, message, inspect, and carry personal agents into websites.',
      rows: ['Iron Tusk / running / cart.update / 00:13', 'Socket Wraith / waiting / claim.lookup / 02:41', 'Nightforge / paused / terminal.chat / 18:09'],
      stats: ['3 mounted', '4 callbacks', 'healthy'],
      actions: ['Mount Agent', 'Open TUI', 'Send Message', 'Review Logs', 'Detach Booth'],
      tint: '#36f0b0',
    },
    contracts: {
      title: 'Contract Pricing',
      subtitle: 'Three paths: embedded agent, bring-your-own agent, or hosted agent.',
      rows: ['Site hires agent / API key to session', 'User brings agent / connect amerc', 'Hosted mercenary / TUI operations'],
      stats: ['session', 'skills', 'runtime'],
      actions: ['Create API Key', 'Bind Skills', 'Set Budget', 'Publish Terms', 'Start Session'],
      tint: '#f2b85f',
    },
    admin: {
      title: 'Quartermaster',
      subtitle: 'Tenant, key, session, skill, and risk controls for operators.',
      rows: ['northstar-retail / embedded / green', 'claims-lab / byoa / amber', 'sandbox / hosted / red'],
      stats: ['tenants', 'keys', 'risk queue'],
      actions: ['Audit Tenants', 'Rotate Keys', 'Trace Sessions', 'Block Skill', 'Review Risk'],
      tint: '#f2b85f',
    },
    signin: {
      title: 'Open Booth',
      subtitle: 'Sign in to the mercenary control surface.',
      rows: ['Guild handle / operator@vertical-site.ai', 'Access sigil / ************', `Release / ${RELEASE}`],
      stats: ['preview', 'amerc.ai', 'frontend'],
      actions: ['Choose Account', 'Link Agent', 'Grant Scope', 'Enter Booth', 'Return to Site'],
      tint: '#9d73ff',
    },
  };
  return panels[route] || panels.home;
}

// Characters that live on the tavern floor. Clicking one routes you.
const CHARACTERS = [
  {
    id: 'orc', sprite: '/scene2d/orc.png', route: 'agents',
    name: 'Grommash', role: 'Bartender', say: 'Pick a mercenary, friend.',
    left: '72%', h: 460, z: 6, flip: false, bob: 3.4,
  },
  {
    id: 'elf', sprite: '/scene2d/elf.png', route: 'home',
    name: 'Aelis', role: 'Guide', say: 'Welcome to amerc. This way.',
    left: '46%', h: 420, z: 5, flip: false, bob: 4.2,
  },
  {
    id: 'dwarf', sprite: '/scene2d/dwarf.png', route: 'booth',
    name: 'Durn', role: 'Patron', say: 'My booth runs three agents.',
    left: '20%', h: 360, z: 4, flip: true, bob: 3.0,
  },
];

// ---------------------------------------------------------------------------
// Top bar
// ---------------------------------------------------------------------------
function PixelTopbar({ route, setRoute, auth }) {
  const [open, setOpen] = useState(false);
  const go = (id) => { setRoute(id); setOpen(false); };
  const loggedIn = !!auth?.user;
  const isAdmin = auth?.user?.role === 'admin';
  const nav = (
    <>
      {NAV.filter((item) => !(item.id === 'signin' && loggedIn)).map((item) => (
        <button key={item.id} className={`px-nav-btn${route === item.id ? ' active' : ''}`} onClick={() => go(item.id)} type="button">
          {item.label}
        </button>
      ))}
      {isAdmin && (
        <button className={`px-nav-btn quartermaster${route === 'admin' ? ' active' : ''}`} onClick={() => go('admin')} type="button">
          Quartermaster
        </button>
      )}
      {loggedIn && (
        <button className="px-nav-btn px-nav-user" onClick={() => auth.logout()} type="button" title="Log out">
          {auth.user.handle} ⏻
        </button>
      )}
    </>
  );
  return (
    <header className="px-topbar">
      <button className="px-logo" onClick={() => go('home')} type="button" aria-label="amerc home">
        <span className="px-logo-gem" aria-hidden="true" />
        <strong>amerc</strong>
        <small>agent mercenary tavern</small>
        <em>v{RELEASE}</em>
      </button>
      <nav className="px-nav" aria-label="Primary">{nav}</nav>
      <button className="px-menu" onClick={() => setOpen((v) => !v)} type="button" aria-label="Toggle menu">
        {open ? <X size={20} /> : <Menu size={20} />}
      </button>
      {open && <div className="px-mobile">{nav}</div>}
    </header>
  );
}

// ---------------------------------------------------------------------------
// Scene
// ---------------------------------------------------------------------------
function TavernFloor({ route, setRoute, auth }) {
  const stageRef = useRef(null);
  const [parallax, setParallax] = useState({ x: 0, y: 0 });
  const [active, setActive] = useState(null); // hovered/selected character id

  const onMove = useCallback((e) => {
    const el = stageRef.current;
    if (!el) return;
    const r = el.getBoundingClientRect();
    const px = (e.clientX - r.left) / r.width - 0.5;
    const py = (e.clientY - r.top) / r.height - 0.5;
    setParallax({ x: px, y: py });
  }, []);

  const embers = useMemo(
    () => Array.from({ length: 26 }, (_, i) => ({
      id: i,
      left: `${(i * 37) % 100}%`,
      delay: `${(i % 13) * 0.9}s`,
      dur: `${7 + (i % 6)}s`,
      size: 2 + (i % 3),
    })),
    [],
  );

  return (
    <div className="px-stage" ref={stageRef} onMouseMove={onMove} onMouseLeave={() => setParallax({ x: 0, y: 0 })}>
      {/* parallax tavern backdrop */}
      <div
        className="px-bg"
        style={{ transform: `translate3d(${parallax.x * -14}px, ${parallax.y * -8}px, 0) scale(1.08)` }}
      />
      <div className="px-bg-haze" />

      {/* floating embers */}
      <div className="px-embers" aria-hidden="true">
        {embers.map((e) => (
          <span key={e.id} style={{ left: e.left, animationDelay: e.delay, animationDuration: e.dur, width: e.size, height: e.size }} />
        ))}
      </div>

      {/* characters on the floor */}
      <div
        className="px-floor"
        style={{ transform: `translate3d(${parallax.x * 10}px, 0, 0)` }}
      >
        {CHARACTERS.map((c) => (
          <button
            key={c.id}
            type="button"
            className={`px-char${active === c.id ? ' active' : ''}${route === c.route ? ' here' : ''}`}
            style={{ left: c.left, zIndex: c.z, '--bob': `${c.bob}s` }}
            onMouseEnter={() => setActive(c.id)}
            onMouseLeave={() => setActive((p) => (p === c.id ? null : p))}
            onClick={() => setRoute(c.route)}
            aria-label={`${c.name} the ${c.role}`}
          >
            {(active === c.id || route === c.route) && (
              <span className="px-speech">
                <strong>{c.name}</strong> · {c.role}
                <em>{c.say}</em>
              </span>
            )}
            <img
              src={c.sprite}
              alt=""
              draggable={false}
              style={{ height: `min(${c.h}px, 58vh)`, transform: c.flip ? 'scaleX(-1)' : 'none' }}
            />
            <span className="px-char-shadow" />
          </button>
        ))}
      </div>

      {/* warm light + vignette */}
      <div className="px-vignette" aria-hidden="true" />

      {/* foreground holo board with route content */}
      <RoutePanel route={route} setRoute={setRoute} auth={auth} />
    </div>
  );
}

function RoutePanel({ route, setRoute, auth }) {
  const data = panelData(route);
  const wide = route === 'admin' && auth.user?.role === 'admin';
  return (
    <aside className={`px-board${wide ? ' px-board-wide' : ''}`} style={{ '--tint': data.tint }}>
      <div className="px-board-rivets" aria-hidden="true" />
      <header className="px-board-head">
        <span className="px-board-tag">{route === 'admin' ? 'BACKDOOR' : route === 'signin' ? 'GATEHOUSE' : 'WANTED BOARD'}</span>
        <h2>{data.title}</h2>
        <p>{data.subtitle}</p>
      </header>

      {route === 'signin' && <AuthPanel auth={auth} onDone={() => setRoute('booth')} />}
      {route === 'admin' && <AdminConsole auth={auth} />}
      {route !== 'signin' && route !== 'admin' && (
      <>
        <RouteBody data={data} route={route} setRoute={setRoute} />
      </>
      )}
    </aside>
  );
}

function RouteBody({ data, route, setRoute }) {
  return (
    <>
      <ul className="px-board-rows">
        {data.rows.map((r, i) => (
          <li key={i}><span className="px-bullet" />{r}</li>
        ))}
      </ul>
      <div className="px-board-stats">
        {data.stats.map((s, i) => (
          <span key={i} className="px-stat">{s}</span>
        ))}
      </div>
      <div className="px-board-actions">
        {data.actions.map((a, i) => (
          <button key={i} type="button" className="px-action" onClick={() => setRoute(route === 'home' ? 'agents' : route)}>
            {a}
          </button>
        ))}
      </div>
    </>
  );
}

export default function Scene2DApp() {
  const [route, setRoute] = useHashRoute();
  const auth = useAuth();
  return (
    <main className="px-app">
      <h1 className="sr-only">amerc agent mercenary tavern</h1>
      <PixelTopbar route={route} setRoute={setRoute} auth={auth} />
      <TavernFloor route={route} setRoute={setRoute} auth={auth} />
    </main>
  );
}