// Vip PTZ Camera Card
// Purpose: Provides the verified-user entry point and fullscreen controller for the single Reolink PTZ camera.
// Scope: Owns PTZ UI state only; server-side PTZ ownership, rover handoff, and command authorization remain authoritative.
import { useCallback, useEffect, useMemo, useRef, useState } from 'react';
import { createPortal } from 'react-dom';
import ChatPanel from '../ChatPanel/index.jsx';
import CardFrame from '../CardFrame/index.jsx';
import GPIOToggleControl from '../GPIOToggleControl/index.jsx';
import ControlPadPanel from '../MobileControls/ControlPadPanel.jsx';
import PtzLiveVideo from '../PtzLiveVideo/index.jsx';
import ReplaySourcesPanel from '../ReplaySourcesPanel/index.jsx';
import KeyPill from './VipAudioUploadCard/KeyPill.jsx';
import { useSessionActions, useSessionSelector } from '../../context/SessionContext.jsx';
import { useControlSelector } from '../../controls/index.js';
import { formatKeyLabel } from '../../controls/keymapUtils.js';
import { usePtzCameraSnapshots } from '../../hooks/usePtzCameraSnapshot.js';
import { isFeatureEnabled } from '../../lib/features.js';

const PTZ_CAMERA_ID = 'ptz-camera';
const PTZ_ZOOM_SPEED = 0.55;

function formatRemaining(deadline) {
  const remaining = Math.max(0, Math.ceil((Number(deadline || 0) - Date.now()) / 1000));
  if (!remaining) return '--';
  const minutes = Math.floor(remaining / 60);
  const seconds = remaining % 60;
  return `${minutes}:${String(seconds).padStart(2, '0')}`;
}

function isSpotlightOn(light = {}) {
  if (typeof light?.on === 'boolean') return light.on;
  const raw = light?.state;
  if (typeof raw === 'string') {
    const normalized = raw.trim().toLowerCase();
    return !['', '0', 'off', 'false'].includes(normalized);
  }
  return Boolean(Number(raw));
}

function normalizeIrMode(mode) {
  const normalized = String(mode || '').trim().toLowerCase();
  if (normalized === 'on') return 'On';
  if (normalized === 'off') return 'Off';
  return 'Auto';
}

function nextIrMode(currentMode) {
  const current = normalizeIrMode(currentMode);
  if (current === 'Auto') return 'On';
  if (current === 'On') return 'Off';
  return 'Auto';
}

function PtzSnapshotPreview({ feed, label = 'PTZ Camera' }) {
  return (
    <div className="relative w-full overflow-hidden bg-black" style={{ aspectRatio: '16 / 9' }}>
      {feed?.objectUrl ? (
        <img src={feed.objectUrl} alt={label} className="h-full w-full object-cover" />
      ) : (
        <div className="flex h-full w-full items-center justify-center text-xs text-slate-400">Waiting for snapshot...</div>
      )}
      <div className="pointer-events-none absolute left-0 top-0 bg-black/70 px-1 py-0.5 text-xs font-semibold text-white">
        {label}
      </div>
      <div className="pointer-events-none absolute bottom-0 left-0 m-1 rounded bg-black/70 px-1 py-0.5 text-[0.7rem] text-slate-100">
        {feed?.error ? `Error: ${feed.error}` : feed?.status || 'connecting'}
      </div>
    </div>
  );
}

function StatusRow({ label, value, tone = '' }) {
  return (
    <div className="flex items-center justify-between gap-1 text-xs">
      <span className="text-slate-400">{label}</span>
      <span className={`min-w-0 truncate font-medium ${tone || 'text-slate-100'}`}>{value}</span>
    </div>
  );
}

function formatPublisherProgress(progress = null) {
  /*
    ffmpeg progress is intentionally shown as raw operational numbers instead
    of translated prose. When the PTZ video feels delayed, fps/speed/drop/out
    time make it obvious whether ffmpeg itself is keeping up or the delay is
    somewhere before/after the transcoder.
  */
  if (!progress) return null;
  return [
    progress.fps ? `fps ${progress.fps}` : null,
    progress.speed ? `speed ${progress.speed}` : null,
    progress.drop_frames ? `drop ${progress.drop_frames}` : null,
    progress.out_time ? `out ${progress.out_time}` : null,
  ].filter(Boolean).join(' | ');
}

function PtzQueueList({ queue = [], operatorLabel = '' }) {
  const hasQueue = Array.isArray(queue) && queue.length > 0;
  return (
    <div className="space-y-0.5">
      <div className="panel-muted text-xs">Turn queue</div>
      <div className="space-y-0.5">
        {operatorLabel ? (
          <div className="surface flex items-center justify-between gap-1 text-xs">
            <span className="text-slate-400">Now</span>
            <span className="min-w-0 truncate text-emerald-200">{operatorLabel}</span>
          </div>
        ) : null}
        {hasQueue ? queue.map((entry, index) => (
          <div key={entry.socketId || `${entry.label}-${index}`} className="surface flex items-center justify-between gap-1 text-xs">
            <span className="text-slate-400">{index + 1}</span>
            <span className="min-w-0 truncate text-slate-100">{entry.label || entry.socketId || 'queued user'}</span>
          </div>
        )) : (
          <div className="surface text-xs text-slate-400">No one waiting</div>
        )}
      </div>
    </div>
  );
}

function PtzStatePanel({ ptz, onClose, onRelease, releaseDisabled = false }) {
  const spotlightOn = isSpotlightOn(ptz?.light);
  const irMode = normalizeIrMode(ptz?.ir?.state);
  const publisher = ptz?.publisher || {};
  const publisherStatus = publisher.running
    ? `running${publisher.pid ? ` ${publisher.pid}` : ''}`
    : publisher.restartAt
      ? 'restarting'
      : publisher.lastEvent || 'stopped';
  const publisherProgress = formatPublisherProgress(publisher.progress);
  const statusTone = ptz?.error ? 'text-amber-300' : ptz?.isOperator ? 'text-emerald-300' : 'text-slate-100';

  return (
    <CardFrame
      title="Camera state"
      actions={onClose ? <button type="button" className="button-dark text-xs" onClick={onClose}>Close</button> : null}
      bodyClassName="space-y-0.5 p-1 text-sm"
    >
      <StatusRow label="Mode" value={ptz?.isOperator ? 'operator' : ptz?.queuedPosition ? `queued ${ptz.queuedPosition}` : 'spectator'} tone={statusTone} />
      <StatusRow label="Operator" value={ptz?.operatorLabel || 'none'} />
      <StatusRow label="Remaining" value={formatRemaining(ptz?.deadline)} />
      <StatusRow label="Spotlight" value={spotlightOn ? 'On' : 'Off'} tone={spotlightOn ? 'text-emerald-300' : 'text-slate-200'} />
      <StatusRow label="Infrared mode" value={irMode} />
      <StatusRow label="Stream" value={ptz?.status || ptz?.error || 'idle'} tone={ptz?.error ? 'text-amber-300' : ''} />
      <StatusRow label="Transcoder" value={publisherStatus} tone={publisher.running ? 'text-emerald-300' : 'text-amber-300'} />
      {publisherProgress ? <StatusRow label="Progress" value={publisherProgress} /> : null}
      {publisher.lastStderr ? (
        <div className="surface max-h-24 overflow-y-auto whitespace-pre-wrap break-words font-mono text-[0.68rem] leading-tight text-slate-200">
          {publisher.lastStderr}
        </div>
      ) : null}
      {ptz?.blocked?.message ? (
        <div className="rounded border border-amber-500/50 bg-amber-950/40 p-1 text-xs text-amber-100">
          {ptz.blocked.message}
        </div>
      ) : null}
      {onRelease ? (
        <button type="button" className="button-dark w-full text-xs" disabled={releaseDisabled} onClick={onRelease}>
          Release camera
        </button>
      ) : null}
    </CardFrame>
  );
}

function PtzLightingControls({ ptz, disabled = false }) {
  const { ptzSpotlight, ptzIr } = useSessionActions();
  const [busy, setBusy] = useState('');
  const spotlightOn = isSpotlightOn(ptz?.light);
  const irMode = normalizeIrMode(ptz?.ir?.state);

  const toggleSpotlight = async (nextOn) => {
    if (disabled) return;
    setBusy('spotlight');
    try {
      await ptzSpotlight({ state: nextOn ? 1 : 0 });
    } finally {
      setBusy('');
    }
  };

  const cycleIr = async () => {
    if (disabled) return;
    setBusy('ir');
    try {
      await ptzIr({ state: nextIrMode(irMode) });
    } finally {
      setBusy('');
    }
  };

  return (
    <div className="mobile-touch-control grid grid-cols-2 gap-0.5 text-sm">
      <GPIOToggleControl
        label="Spotlight"
        on={spotlightOn}
        disabled={disabled || busy === 'spotlight'}
        onToggle={toggleSpotlight}
        heightClass="min-h-14"
      />
      <button
        type="button"
        className="mobile-touch-control flex min-h-14 flex-col items-center justify-center gap-0.5 rounded-xl border-2 border-cyan-300/70 bg-cyan-900 px-1 py-0.75 text-center text-cyan-50 disabled:opacity-50"
        disabled={disabled || busy === 'ir'}
        onClick={cycleIr}
      >
        <span className="text-sm font-semibold">Infrared</span>
        <span className="rounded bg-cyan-300 px-1 py-0.5 text-[0.7rem] font-semibold text-cyan-950">{irMode}</span>
      </button>
    </div>
  );
}

function PtzMobileZoomButtons({ disabled = false }) {
  const { ptzMove, ptzStop } = useSessionActions();
  const stopZoom = useCallback(() => {
    ptzStop().catch(() => {});
  }, [ptzStop]);
  const startZoom = useCallback(
    (direction) => (event) => {
      /*
        Mobile needs explicit zoom targets because the regular mobile drive pad
        is already used for pan/tilt. Desktop does not render these buttons; it
        uses the mapped camera up/down controls shown in the reference panel.
      */
      event.preventDefault();
      if (disabled) return;
      ptzMove({ pan: 0, tilt: 0, zoom: direction * PTZ_ZOOM_SPEED }).catch(() => {});
    },
    [disabled, ptzMove],
  );
  const stopFromPointer = useCallback(
    (event) => {
      event?.preventDefault?.();
      if (disabled) return;
      stopZoom();
    },
    [disabled, stopZoom],
  );

  return (
    <div className="mobile-touch-control grid grid-cols-2 gap-0.5 text-sm">
      <button
        type="button"
        className="mobile-touch-control button-dark min-h-10 text-xs disabled:opacity-50"
        disabled={disabled}
        onPointerDown={startZoom(-1)}
        onPointerUp={stopFromPointer}
        onPointerCancel={stopFromPointer}
        onPointerLeave={stopFromPointer}
        onContextMenu={(event) => event.preventDefault()}
      >
        Zoom out
      </button>
      <button
        type="button"
        className="mobile-touch-control button-dark min-h-10 text-xs disabled:opacity-50"
        disabled={disabled}
        onPointerDown={startZoom(1)}
        onPointerUp={stopFromPointer}
        onPointerCancel={stopFromPointer}
        onPointerLeave={stopFromPointer}
        onContextMenu={(event) => event.preventDefault()}
      >
        Zoom in
      </button>
    </div>
  );
}

function PtzMobileControlsPanel({ ptz, disabled = false }) {
  return (
    <div className="mobile-touch-control space-y-0.5">
      <PtzMobileZoomButtons disabled={disabled} />
      <div className="mobile-touch-control h-44 min-h-0">
        {/*
          Reuse the rover mobile movement card instead of building a second PTZ
          joystick. Its drive vector goes through the shared internal control
          layer, where the PTZ adapter already converts movement plus speed mode
          into camera pan/tilt commands.
        */}
        <ControlPadPanel compact disabled={disabled} />
      </div>
      <PtzLightingControls ptz={ptz} disabled={disabled} />
    </div>
  );
}

function keyLabelFor(keymap, actionId) {
  return formatKeyLabel(keymap?.[actionId]?.[0]);
}

function PtzControlReference() {
  const keymap = useControlSelector((control) => control.state.keymap);
  const rows = [
    ['Tilt up', 'driveForward'],
    ['Tilt down', 'driveBackward'],
    ['Pan left', 'driveLeft'],
    ['Pan right', 'driveRight'],
    ['Zoom in', 'cameraUp'],
    ['Zoom out', 'cameraDown'],
    ['Spotlight', 'headlightToggle'],
    ['Infrared mode', 'laserToggle'],
  ];

  return (
    <CardFrame title="Controls" bodyClassName="space-y-0.5 p-1 text-xs">
      {rows.map(([label, actionId]) => (
        <div key={label} className="surface flex items-center justify-between gap-1">
          <span className="text-slate-400">{label}</span>
          {/* Use the same key display component as the rest of the UI so PTZ
              controls read as normal mapped controls instead of custom labels. */}
          <KeyPill label={keyLabelFor(keymap, actionId)} />
        </div>
      ))}
    </CardFrame>
  );
}

function PtzController({ open, onClose, layout = 'desktop' }) {
  const ptz = useSessionSelector((state) => state.session?.ptzCamera || null);
  const isOperator = Boolean(ptz?.isOperator);
  const isMobile = layout === 'mobile-portrait' || layout === 'mobile-landscape';
  const { ptzRelease } = useSessionActions();
  const snapshotFeeds = usePtzCameraSnapshots([PTZ_CAMERA_ID], { enabled: open && !isOperator });
  const snapshot = snapshotFeeds[PTZ_CAMERA_ID] || null;
  const [releasePending, setReleasePending] = useState(false);

  if (!open) return null;

  const releaseAndClose = async () => {
    setReleasePending(true);
    try {
      await ptzRelease();
      onClose();
    } finally {
      setReleasePending(false);
    }
  };

  const desktopSidebar = (
    <>

      <div className="shrink-0">
        <PtzQueueList queue={ptz?.queue} operatorLabel={ptz?.operatorLabel} />
      </div>
      {isOperator ? (
        <div className="shrink-0">
          <PtzLightingControls ptz={ptz} />
        </div>
      ) : (
        <div className="shrink-0">
          <CardFrame title="Controls" bodyClassName="p-1 text-xs text-slate-400">
            Live PTZ controls unlock when your camera turn is active.
          </CardFrame>
        </div>
      )}
      <div className="shrink-0">
        <PtzControlReference />
      </div>
      <div className="min-h-[12rem] flex-1">
        {/*
          The global chat key focuses the input registered by ChatPanel through
          ChatContext. Keeping a real ChatPanel mounted inside the PTZ fullscreen
          sidebar lets the normal keyboard path focus chat and lets Enter submit
          through the existing chat composer form instead of adding PTZ-specific
          chat handling.
        */}
        <ChatPanel fillHeight title="Chat" />
      </div>
      <div className="shrink-0">
        <ReplaySourcesPanel panelId="ptz-controller-replay" />
      </div>
      <div className="shrink-0">
        <PtzStatePanel
          ptz={ptz}
          onClose={onClose}
          onRelease={isOperator ? releaseAndClose : null}
          releaseDisabled={releasePending}
        />
      </div>
    </>
  );

  const mobileSidebar = (
    <>
      <div className="shrink-0">
        <PtzMobileControlsPanel ptz={ptz} disabled={!isOperator} />
      </div>
      <div className="min-h-[10rem] flex-1">
        {/*
          Mobile uses the same ChatPanel registration as desktop so the mapped
          chat key and the on-screen input stay on one shared chat implementation.
        */}
        <ChatPanel fillHeight title="Chat" />
      </div>
      <div className="shrink-0">
        <ReplaySourcesPanel panelId="ptz-controller-replay-mobile" />
      </div>
      <div className="shrink-0">
        <PtzStatePanel
          ptz={ptz}
          onClose={onClose}
          onRelease={isOperator ? releaseAndClose : null}
          releaseDisabled={releasePending}
        />
      </div>
      <div className="shrink-0">
        <PtzQueueList queue={ptz?.queue} operatorLabel={ptz?.operatorLabel} />
      </div>
    </>
  );

  const sidebarWidthClass = isMobile
    ? 'grid-cols-[minmax(0,1fr)_14rem]'
    : 'grid-cols-[minmax(0,1fr)_20rem]';

  const controller = (
    <div className="fixed inset-0 z-[110] h-[100dvh] w-[100vw] overflow-hidden bg-black text-slate-100">
      <CardFrame
        hideHeader
        fillHeight
        clipOverflow={false}
        className="h-[100dvh] w-[100vw] rounded-none border-0 !bg-black"
        bodyClassName={`grid h-full min-h-0 overflow-hidden ${sidebarWidthClass}`}
      >
        <main className="relative min-h-0 min-w-0 bg-black">
          {isOperator ? (
            <PtzLiveVideo enabled startMuted={false} />
          ) : (
            <PtzSnapshotPreview feed={snapshot} label={ptz?.name || 'PTZ Camera'} />
          )}
        </main>
        <aside className="flex h-full min-h-0 items-stretch overflow-hidden border-l border-neutral-600 bg-neutral-950 text-sm">
          <div className="flex min-h-0 w-full flex-col gap-0.5 overflow-y-auto p-0.5">
            {isMobile ? mobileSidebar : desktopSidebar}
          </div>
        </aside>
      </CardFrame>
    </div>
  );

  /*
    The controller is a true fullscreen surface, so mount it directly under
    document.body instead of inside the VIP tab/card tree. That keeps tab panel
    spacing, mobile banners, and parent overflow rules from creating visible
    gaps around a fixed-position camera interface.
  */
  return createPortal(controller, document.body);
}

export default function VipPtzCameraCard({ onMessage, fullWidth = false, layout = 'desktop' }) {
  const featureEnabled = useSessionSelector((state) => isFeatureEnabled(state, 'ptzCamera'));
  const ptz = useSessionSelector((state) => state.session?.ptzCamera || null);
  const isVerified = useSessionSelector((state) => Boolean(state.session?.isVerified));
  const { ptzClaim, ptzRelease } = useSessionActions();
  const snapshotFeeds = usePtzCameraSnapshots([PTZ_CAMERA_ID], { enabled: Boolean(featureEnabled) });
  const snapshot = snapshotFeeds[PTZ_CAMERA_ID] || null;
  const [controllerOpen, setControllerOpen] = useState(false);
  const [pending, setPending] = useState(false);

  const wrapClass = fullWidth ? 'w-full' : 'mx-auto w-full max-w-xl';
  const queueText = useMemo(() => {
    if (ptz?.isOperator) return 'Your turn';
    if (ptz?.queuedPosition) return `Queue position ${ptz.queuedPosition}`;
    if (ptz?.operatorLabel) return `${ptz.operatorLabel} operating`;
    return 'Available';
  }, [ptz?.isOperator, ptz?.operatorLabel, ptz?.queuedPosition]);

  if (!featureEnabled) return null;

  const handleClaim = async () => {
    setPending(true);
    onMessage?.('');
    try {
      const response = await ptzClaim();
      /*
        Requesting the PTZ camera is only enough to open fullscreen after the
        server confirms the user actually became the operator or entered the
        queue. Dock-required failures reject before queue entry, so they must
        leave the user on this card with the dock/charge message visible.
      */
      if (response?.state?.isOperator || response?.state?.queuedPosition) setControllerOpen(true);
      if (response?.state?.isOperator) onMessage?.('PTZ camera turn active.');
      else if (response?.state?.queuedPosition) onMessage?.(`Joined PTZ queue at position ${response.state.queuedPosition}.`);
    } catch (err) {
      onMessage?.(err.message || 'PTZ request failed.');
    } finally {
      setPending(false);
    }
  };

  const handleRelease = async () => {
    setPending(true);
    try {
      await ptzRelease();
      onMessage?.('Left PTZ camera.');
    } catch (err) {
      onMessage?.(err.message || 'Failed to leave PTZ camera.');
    } finally {
      setPending(false);
    }
  };

  return (
    <>
      <CardFrame title="PTZ camera" className={wrapClass} bodyClassName="text-sm text-slate-300">
        <div className="grid w-full gap-0.5 md:grid-cols-[minmax(16rem,0.8fr)_minmax(0,1.2fr)] md:items-start">
          <PtzSnapshotPreview feed={snapshot} label={ptz?.name || 'PTZ Camera'} />
          <div className="flex w-full min-w-0 flex-col gap-0.5">
            <div className="grid w-full grid-cols-2 gap-0.5 text-left text-xs">
              <div className="surface-muted p-1">
                <p className="text-slate-500">State</p>
                <p className="truncate text-slate-100">{queueText}</p>
              </div>
              <div className="surface-muted p-1">
                <p className="text-slate-500">Remaining</p>
                <p className="text-slate-100">{formatRemaining(ptz?.deadline)}</p>
              </div>
              <div className="surface-muted p-1">
                <p className="text-slate-500">Spotlight</p>
                <p className="truncate text-slate-100">{isSpotlightOn(ptz?.light) ? 'On' : 'Off'}</p>
              </div>
              <div className="surface-muted p-1">
                <p className="text-slate-500">Infrared</p>
                <p className="truncate text-slate-100">{normalizeIrMode(ptz?.ir?.state)}</p>
              </div>
            </div>
            <PtzQueueList queue={ptz?.queue} operatorLabel={ptz?.operatorLabel} />
            {ptz?.blocked?.message ? (
              <p className="w-full rounded border border-amber-500/50 bg-amber-950/40 p-1 text-xs text-amber-100">
                {ptz.blocked.message}
              </p>
            ) : null}
            <div className="grid w-full grid-cols-2 gap-0.5">
              {ptz?.isOperator ? (
                <>
                  <button type="button" className="button-dark text-xs" onClick={() => setControllerOpen(true)}>
                    Open controller
                  </button>
                  <button type="button" className="button-dark text-xs" disabled={pending} onClick={handleRelease}>
                    Release
                  </button>
                </>
              ) : (
                <button
                  type="button"
                  className="button-dark col-span-2 text-xs"
                  disabled={pending || !isVerified}
                  onClick={ptz?.queuedPosition ? handleRelease : handleClaim}
                >
                  {ptz?.queuedPosition ? 'Leave queue' : pending ? 'Requesting...' : 'Claim camera'}
                </button>
              )}
            </div>
          </div>
        </div>
      </CardFrame>
      <PtzController open={controllerOpen} onClose={() => setControllerOpen(false)} layout={layout} />
    </>
  );
}