import { lazy, Suspense, useMemo, useState } from "react";
import { classById, FACTIONS, raceById } from "../app/characterCatalog";
import { selectedCharacter, useShellStore } from "../app/shellStore";
import { DualDisplayFrame } from "../components/DualDisplayFrame";
import { useMenuController, type MenuAction } from "../input/useMenuController";
import { CharacterPreview } from "./CharacterPreview";
import { LazyLocalCompanionPanel } from "./LazyLocalCompanionPanel";
import { ControllerButton } from "./ControllerButton";
import { ContentManagerScreen } from "./ContentManagerScreen";
import { BrandMark, ControllerLegend, FrontSurface } from "./FrontSurface";
import { OnlineGroupPanel } from "./OnlineGroupPanel";
import { sessionCanUseShelvedGmTools, SHELVED_MODES_ENABLED } from "../app/releaseFeatures";
import { DungeonReportsScreen } from "./DungeonReportsScreen";
import { MainMenuCharacterEditor, type MainMenuEditor } from "./MainMenuCharacterEditor";
const BossCardCollectionScreen = lazy(() => import("./BossCardCollection"));
const BossTestingScreen = lazy(() => import("./BossTestingScreen").then((module) => ({ default: module.BossTestingScreen })));

const GAME_MODES = [
  {
    id: "dungeons",
    number: "01",
    name: "Dungeons",
    description: "Choose an expedition and lead your party into the depths.",
    available: true,
  },
  ...(SHELVED_MODES_ENABLED ? [{
    id: "manastorms" as const,
    number: "02",
    name: "Manastorms",
    description: "Chain random boss encounters as the storm grows stronger and more rewarding.",
    available: true,
  }, {
    id: "arenas" as const,
    number: "03",
    name: "Arenas",
    description: "Rated 2v2 and 3v3 combat against players or rating-matched opponents.",
    available: true,
  }] : []),
  {
    id: "trials",
    number: "04",
    name: "Trials",
    description: "A new mode is taking shape.",
    available: false,
  },
  {
    id: "downloads",
    number: "05",
    name: "Downloads",
    description: "Install, update, or remove adventures that remain playable offline.",
    available: true,
  },
  {
    id: "options",
    number: "06",
    name: "Options",
    description: "Main-menu settings are coming soon.",
    available: false,
  },
  {
    id: "player-profile",
    number: "07",
    name: "Player Profile",
    description: "Profile details are coming soon.",
    available: false,
  },
] as const;

export function MainMenuScreen() {
  const [contentManagerOpen, setContentManagerOpen] = useState(false);
  const [reportsOpen, setReportsOpen] = useState(false);
  const [cardsOpen, setCardsOpen] = useState(false);
  const [bossTestingOpen, setBossTestingOpen] = useState(false);
  const [editor, setEditor] = useState<MainMenuEditor | null>(null);
  if (editor) return <MainMenuCharacterEditor editor={editor} onClose={() => setEditor(null)} />;
  if (bossTestingOpen) return <Suspense fallback={<p role="status">Opening Boss Testing…</p>}><BossTestingScreen onClose={() => setBossTestingOpen(false)} /></Suspense>;
  if (cardsOpen) return <Suspense fallback={<p role="status">Opening collection log…</p>}><BossCardCollectionScreen onClose={() => setCardsOpen(false)} /></Suspense>;
  if (contentManagerOpen) return <ContentManagerScreen onClose={() => setContentManagerOpen(false)} />;
  if (reportsOpen) return <DungeonReportsScreen onClose={() => setReportsOpen(false)} />;
  return <MainMenuDestinations onOpenDownloads={() => setContentManagerOpen(true)} onOpenReports={() => setReportsOpen(true)} onOpenCards={() => setCardsOpen(true)} onOpenBossTesting={() => setBossTestingOpen(true)} onOpenEditor={setEditor} />;
}

function MainMenuDestinations({ onOpenDownloads, onOpenReports, onOpenCards, onOpenBossTesting, onOpenEditor }: {
  readonly onOpenDownloads: () => void;
  readonly onOpenReports: () => void;
  readonly onOpenCards: () => void;
  readonly onOpenBossTesting: () => void;
  readonly onOpenEditor: (editor: MainMenuEditor) => void;
}) {
  const activeCharacter = useShellStore((state) => state.activeCharacter);
  const rosterCharacter = useShellStore(selectedCharacter);
  const openDungeons = useShellStore((state) => state.openDungeons);
  const openManastorms = useShellStore((state) => state.openManastorms);
  const openArenas = useShellStore((state) => state.openArenas);
  const openClassHall = useShellStore((state) => state.openClassHall);
  const returnToCharacters = useShellStore((state) => state.returnToCharacters);
  const notice = useShellStore((state) => state.notice);
  const session = useShellStore((state) => state.session);
  const openGmAdmin = useShellStore((state) => state.openGmAdmin);
  const character = activeCharacter ?? rosterCharacter;
  const isRom = character?.categoryId === "rom";
  const isGm = sessionCanUseShelvedGmTools(session);

  const actions = useMemo<MenuAction[]>(() => [
    {
      id: "mode-dungeons",
      run: openDungeons,
      neighbors: { right: "mode-manastorms", down: "back-to-roster" },
    },
    ...(SHELVED_MODES_ENABLED ? [{
      id: "mode-manastorms",
      run: openManastorms,
      neighbors: { left: "mode-dungeons", down: "back-to-roster" },
    }, {
      id: "mode-arenas",
      run: openArenas,
      neighbors: { left: "mode-manastorms", down: "back-to-roster" },
    }] : []),
    {
      id: "mode-downloads",
      run: onOpenDownloads,
      neighbors: { left: SHELVED_MODES_ENABLED ? "mode-manastorms" : "mode-dungeons", down: "back-to-roster" },
    },
    {
      id: "back-to-roster",
      run: returnToCharacters,
      neighbors: { up: "mode-dungeons", left: "mode-dungeons" },
    },
    ...(character ? [
      { id: "mode-class-hall", run: openClassHall },
      { id: "mode-talents", run: () => onOpenEditor("talents") },
      { id: "mode-keybinds", run: () => onOpenEditor("keybinds") },
      { id: "mode-bindings", run: () => onOpenEditor("bindings") },
    ] : []),
    ...(isGm ? [{ id: "mode-gm-tools", run: openGmAdmin }] : []),
    { id: "mode-reports", run: onOpenReports },
    { id: "mode-cards", run: onOpenCards },
    { id: "mode-boss-testing", run: onOpenBossTesting },
  ], [character, isGm, onOpenBossTesting, onOpenCards, onOpenDownloads, onOpenEditor, onOpenReports, openArenas, openClassHall, openDungeons, openGmAdmin, openManastorms, returnToCharacters]);
  const controller = useMenuController(actions, {
    initialId: "mode-dungeons",
    onBack: returnToCharacters,
  });

  const race = character ? raceById(character.raceId) : null;
  const characterClass = character ? classById(character.classId) : null;

  return (
    <DualDisplayFrame
      contextLabel="Main menu details"
      top={
        <FrontSurface className="main-menu-screen" ariaLabel="Healer Man main menu">
          <header className="main-menu-header">
            <BrandMark compact />
            <div>
              <span>Adventurer selected</span>
              <strong>Choose your next journey</strong>
            </div>
            <ControllerButton
              controlId="back-to-roster"
              selectedId={controller.selectedId}
              select={controller.select}
              type="button"
              onClick={returnToCharacters}
            >
              Change character
            </ControllerButton>
          </header>

          <aside className="main-menu-character" aria-label="Selected character">
            <div className="main-menu-character__preview">
              <CharacterPreview character={character} />
            </div>
            {character && race && characterClass && (
              <div className="main-menu-character__summary">
                <p className="front-kicker">Ready for adventure</p>
                <h1>{character.name}</h1>
                <strong style={{ color: characterClass.color }}>
                  Level {character.level} {race.name} {characterClass.name}
                </strong>
                <small>{FACTIONS[race.faction].name} / {character.gender}</small>
                {isRom && <small>RoM / {character.secondaryClassId ? `${characterClass.name} + ${classById(character.secondaryClassId).name}` : "Secondary class not chosen"}</small>}
              </div>
            )}
          </aside>

          <main className="main-menu-modes">
            <header>
              <p className="front-kicker">Main menu</p>
              <h2>Ways to play</h2>
              <p>Select a destination. More adventures will unlock here as they are built.</p>
            </header>
            <OnlineGroupPanel />
            <nav className="main-menu-mode-grid" aria-label="Main menu destinations">
              <ControllerButton controlId="mode-boss-testing" selectedId={controller.selectedId} select={controller.select}
                className="front-button main-menu-mode main-menu-mode--available" type="button" onClick={onOpenBossTesting}>
                <b aria-hidden="true">BT</b><span><strong>Boss Testing</strong><small>Choose a boss or fight a random encounter in an empty testing room.</small></span><em>Open</em>
              </ControllerButton>
              {character && <>
                <ControllerButton controlId="mode-talents" selectedId={controller.selectedId} select={controller.select}
                  className="front-button main-menu-mode main-menu-mode--available" type="button" onClick={() => onOpenEditor("talents")}>
                  <b aria-hidden="true">T</b><span><strong>{isRom ? "Skills" : "Talents"}</strong><small>{isRom ? "Review your primary, secondary, and elite skills." : "View your talent trees, spend points, or reset your build."}</small></span><em>Open</em>
                </ControllerButton>
                <ControllerButton controlId="mode-keybinds" selectedId={controller.selectedId} select={controller.select}
                  className="front-button main-menu-mode main-menu-mode--available" type="button" onClick={() => onOpenEditor("keybinds")}>
                  <b aria-hidden="true">K</b><span><strong>Keybinds</strong><small>View and change keyboard or controller bindings.</small></span><em>Open</em>
                </ControllerButton>
                <ControllerButton controlId="mode-bindings" selectedId={controller.selectedId} select={controller.select}
                  className="front-button main-menu-mode main-menu-mode--available" type="button" onClick={() => onOpenEditor("bindings")}>
                  <b aria-hidden="true">A</b><span><strong>Button assignments</strong><small>Choose the abilities on your action bars and controller buttons.</small></span><em>Open</em>
                </ControllerButton>
              </>}
              <ControllerButton controlId="mode-cards" selectedId={controller.selectedId} select={controller.select}
                className="front-button main-menu-mode main-menu-mode--available" type="button" onClick={onOpenCards}>
                <b aria-hidden="true">◆</b><span><strong>Boss Cards</strong><small>Track your collection, rarities, and copies from every dungeon.</small></span><em>Open</em>
              </ControllerButton>
              <ControllerButton controlId="mode-reports" selectedId={controller.selectedId} select={controller.select}
                className="front-button main-menu-mode main-menu-mode--available" type="button" onClick={onOpenReports}>
                <b aria-hidden="true">!</b>
                <span><strong>View Reports</strong><small>Browse dungeon issues and follow their status.</small></span>
                <em>Open</em>
              </ControllerButton>
              {isGm && (
                <ControllerButton
                  controlId="mode-gm-tools"
                  selectedId={controller.selectedId}
                  select={controller.select}
                  className="front-button main-menu-mode main-menu-mode--available main-menu-mode--gm"
                  type="button"
                  onClick={openGmAdmin}
                >
                  <b aria-hidden="true">GM</b>
                  <span><strong>GM Tools</strong><small>Manage Manastorm rules, boss readiness, and encounter placement.</small></span>
                  <em>Authorized</em>
                </ControllerButton>
              )}
              {character && (
                <ControllerButton
                  controlId="mode-class-hall"
                  selectedId={controller.selectedId}
                  select={controller.select}
                  className="front-button main-menu-mode main-menu-mode--available main-menu-mode--class-hall"
                  type="button"
                  onClick={openClassHall}
                >
                  <b aria-hidden="true">CH</b>
                  <span><strong>Class Hall</strong><small>{isRom ? "Choose a permanent partner class and swap your active ordering." : "Change specialization and retune your heirlooms."}</small></span>
                  <em>{isRom && character.level < 10 ? "Unlocks at 10" : "Open"}</em>
                </ControllerButton>
              )}
              {GAME_MODES.map((mode) => mode.available ? (
                <ControllerButton
                  key={mode.id}
                  controlId={`mode-${mode.id}`}
                  selectedId={controller.selectedId}
                  select={controller.select}
                  className="front-button main-menu-mode main-menu-mode--available"
                  type="button"
                  onClick={mode.id === "manastorms"
                    ? openManastorms
                    : mode.id === "arenas"
                      ? openArenas
                    : mode.id === "downloads"
                      ? onOpenDownloads
                      : openDungeons}
                >
                  <b aria-hidden="true">{mode.number}</b>
                  <span><strong>{mode.name}</strong><small>{mode.description}</small></span>
                  <em>Available</em>
                </ControllerButton>
              ) : (
                <button
                  key={mode.id}
                  className="front-button main-menu-mode main-menu-mode--coming-soon"
                  type="button"
                  disabled
                  aria-label={`${mode.name}, coming soon`}
                >
                  <b aria-hidden="true">{mode.number}</b>
                  <span><strong>{mode.name}</strong><small>{mode.description}</small></span>
                  <em>Coming soon</em>
                </button>
              ))}
            </nav>
            {notice && <p className="front-notice main-menu-notice" role="status" aria-live="polite">{notice}</p>}
          </main>

          <ControllerLegend back />
        </FrontSurface>
      }
      bottom={<LazyLocalCompanionPanel />}
    />
  );
}