import { useEffect, useState } from 'react';
import { Link, Outlet, useLocation, useNavigate } from 'react-router-dom';
import { useAuthStore, type UserStatus } from '../stores/auth.ts';
import { useWebSocketStore } from '../stores/ws.ts';
import { useServerStore } from '../stores/server.ts';
import { useLayoutStore } from '../stores/layout.ts';
import { ServerBar } from './ServerBar.tsx';
import { ChannelList } from './ChannelList.tsx';
import { ConversationList } from './ConversationList.tsx';
import { MemberList } from './MemberList.tsx';
import { VoicePanel } from './VoicePanel.tsx';
import { ServerSettingsModal } from './ServerSettingsModal.tsx';
const STATUS_CYCLE: UserStatus[] = ['online', 'idle', 'dnd', 'offline'];
function statusColor(status: UserStatus): string {
  switch (status) {
    case 'online':
      return 'bg-gb-green';
    case 'idle':
      return 'bg-gb-yellow';
    case 'dnd':
      return 'bg-gb-red';
    default:
      return 'bg-gb-gray';
  }
}
function statusLabel(status: UserStatus): string {
  return status.toUpperCase();
}
export function Layout() {
  const isAuthenticated = useAuthStore((state) => state.isAuthenticated);
  const isLoading = useAuthStore((state) => state.isLoading);
  const user = useAuthStore((state) => state.user);
  const logout = useAuthStore((state) => state.logout);
  const updateProfile = useAuthStore((state) => state.updateProfile);
  const wsConnect = useWebSocketStore((s) => s.connect);
  const wsDisconnect = useWebSocketStore((s) => s.disconnect);
  const navigate = useNavigate();
  const location = useLocation();
  const [showStatusMenu, setShowStatusMenu] = useState(false);
  const isDM = useLayoutStore((s) => s.isDM);
  const mobileView = useLayoutStore((s) => s.mobileView);
  const setMobileView = useLayoutStore((s) => s.setMobileView);
  const [showServerSettings, setShowServerSettings] = useState(false);
  const activeServerId = useServerStore((s) => s.activeServerId);
  const activeChannelId = useServerStore((s) => s.activeChannelId);
  useEffect(() => {
    wsConnect();
    return () => { wsDisconnect(); };
  }, [wsConnect, wsDisconnect]);
  useEffect(() => {
    if (!isLoading && !isAuthenticated && location.pathname !== '/login') {
      navigate('/login', { replace: true });
    }
  }, [isLoading, isAuthenticated, location.pathname, navigate]);
  // Navigate to chat when a channel/DM is selected on mobile
  useEffect(() => {
    const unsub = useServerStore.subscribe((state, prev) => {
      if (state.activeChannelId !== prev.activeChannelId && state.activeChannelId) {
        setMobileView('chat');
      }
    });
    return unsub;
  }, [setMobileView]);
  // Also switch to chat on mobile when navigating to a DM
  useEffect(() => {
    if (location.pathname.startsWith('/dm/') && location.pathname !== '/dm') {
      setMobileView('chat');
    }
  }, [location.pathname, setMobileView]);
  const handleStatusChange = async (status: UserStatus) => {
    setShowStatusMenu(false);
    try {
      await updateProfile({ status });
    } catch (err) {
      // Error is surfaced via auth store; menu closes optimistically.
    }
  };
  const currentStatus = user?.status ?? 'offline';
  if (isLoading) {
    return (
      <div className="h-full w-full flex items-center justify-center bg-gb-bg text-gb-fg-f font-mono">
        [booting...]
      </div>
    );
  }
  if (!isAuthenticated) {
    return null;
  }
  return (
    <div className="h-full w-full bg-gb-bg text-gb-fg font-mono flex flex-col p-1 md:p-2">
      <div className="flex-1 terminal-border bg-gb-bg-h flex flex-col min-h-0">
        {/* Top bar */}
        <div className="flex items-center justify-between px-2 md:px-3 py-1 border-b border-gb-bg-t bg-gb-bg-s gap-2">
          <div className="flex items-center gap-2 min-w-0">
            {/* Mobile: hamburger to show sidebar */}
            <button
              type="button"
              onClick={() => setMobileView(mobileView === 'sidebar' ? 'chat' : 'sidebar')}
              className="md:hidden terminal-button text-xs px-2 py-0.5 shrink-0"
            >
              {mobileView === 'sidebar' ? '✕' : '☰'}
            </button>
            <span className="text-gb-orange font-bold shrink-0">DUMPSTER</span>
          </div>
          <div className="flex items-center gap-2 md:gap-4 text-xs text-gb-fg-s min-w-0">
            <div className="relative">
              <button
                type="button"
                onClick={() => setShowStatusMenu((prev) => !prev)}
                className="flex items-center gap-1 md:gap-2 hover:text-gb-fg transition-colors"
                title="Change status"
              >
                <span className={`w-2.5 h-2.5 rounded-full ${statusColor(currentStatus)}`} />
                <span className="text-gb-aqua hidden sm:inline">{user?.username || 'unknown'}</span>
                <span className="text-gb-fg-f hidden sm:inline">[{statusLabel(currentStatus)}]</span>
              </button>
              {showStatusMenu && (
                <div className="absolute right-0 top-full mt-1 z-50 w-32 bg-gb-bg-s border border-gb-bg-t shadow-lg">
                  {STATUS_CYCLE.map((s) => (
                    <button
                      key={s}
                      type="button"
                      onClick={() => handleStatusChange(s)}
                      className="w-full px-2 py-1 text-left text-xs font-mono flex items-center gap-2 hover:bg-gb-orange hover:text-gb-bg transition-colors"
                    >
                      <span className={`w-2 h-2 rounded-full ${statusColor(s)}`} />
                      <span>{statusLabel(s)}</span>
                    </button>
                  ))}
                </div>
              )}
            </div>
            <Link to="/settings" className="terminal-button text-xs hidden sm:inline-flex">[SETTINGS]</Link>
            {activeServerId && (
              <button
                onClick={() => setShowServerSettings(true)}
                className="terminal-button text-xs hidden md:inline-flex"
              >
                [SERVER SETTINGS]
              </button>
            )}
            {/* Mobile: members toggle */}
            {!isDM && (
              <button
                type="button"
                onClick={() => setMobileView(mobileView === 'members' ? 'chat' : 'members')}
                className="md:hidden terminal-button text-xs px-2 py-0.5"
              >
                {mobileView === 'members' ? '✕' : '👤'}
              </button>
            )}
            <button onClick={() => logout().then(() => navigate('/login'))} className="terminal-button text-xs">
              [LOGOUT]
            </button>
          </div>
        </div>

        {/* Main content area */}
        <div className="flex-1 flex min-h-0 relative">
          {/* Sidebar: ServerBar + ChannelList/ConversationList */}
          {/* Desktop: always visible as left columns */}
          {/* Mobile: full-screen overlay when mobileView === 'sidebar' */}
          <div
            className={`
              ${mobileView === 'sidebar' ? 'flex' : 'hidden'}
              md:flex
              absolute md:relative inset-0 md:inset-auto z-30 md:z-auto
              flex-shrink-0
            `}
          >
            <ServerBar />
            {isDM ? <ConversationList /> : <ChannelList />}
            {/* Close sidebar on mobile after selection */}
            <div
              className="flex-1 md:hidden"
              onClick={() => setMobileView('chat')}
            />
          </div>

          {/* Chat area: always in DOM, hidden on mobile when sidebar/members shown */}
          <div
            className={`
              ${mobileView === 'chat' ? 'flex' : 'hidden'}
              md:flex
              flex-1 min-w-0 flex-col
            `}
          >
            <div className="flex-1 min-h-0 flex flex-col overflow-hidden">
              <VoicePanel />
              <div className="flex-1 min-h-0">
                <Outlet />
              </div>
            </div>
          </div>

          {/* Members panel */}
          {/* Desktop: right column */}
          {/* Mobile: full-screen overlay when mobileView === 'members' */}
          {!isDM && (
            <div
              className={`
                ${mobileView === 'members' ? 'flex' : 'hidden'}
                md:flex
                absolute md:relative inset-0 md:inset-auto z-30 md:z-auto
                flex-shrink-0
              `}
            >
              {/* Tap background to close on mobile */}
              <div
                className="flex-1 md:hidden"
                onClick={() => setMobileView('chat')}
              />
              <MemberList />
            </div>
          )}
        </div>

        {showServerSettings && activeServerId && (
          <ServerSettingsModal serverId={activeServerId} onClose={() => setShowServerSettings(false)} />
        )}
        <div className="px-2 md:px-3 py-1 border-t border-gb-bg-t text-xs text-gb-fg-f flex justify-between bg-gb-bg-s">
          <span>TERM {__APP_VERSION__}</span>
          <span>{new Date().toISOString().slice(0, 10)}</span>
        </div>
      </div>
    </div>
  );
}
