// Movement Column
// Purpose: Assembles the mobile movement column, which is the right column by default.
// Scope: Owns movement availability while the in-video DockingHud owns every dock/undock action.
import { FaChargingStation } from 'react-icons/fa';
import { useControlActions, useControlSelector } from '../../controls/index.js';
import { useSessionSelector } from '../../context/SessionContext.jsx';
import { useTelemetrySelector } from '../../context/TelemetryContext.jsx';
import { dockTelemetryEqual, selectDockTelemetry } from '../../context/telemetryViews.js';
import useCanControlRover from '../../hooks/useCanControlRover.js';
import { triggerTouchHaptic } from '../../lib/touchHaptics.js';
import ControlPadPanel from './ControlPadPanel.jsx';

function MovementColumnContent({ layout }) {
  const roverId = useControlSelector((control) => control.state.roverId);
  const actions = useControlActions();
  const dockTelemetry = useTelemetrySelector(roverId, selectDockTelemetry, dockTelemetryEqual);
  const canControl = useCanControlRover(roverId);
  const batteryState = useSessionSelector((state) => {
    const rover = (state.session?.roster || []).find((entry) => String(entry.id) === String(roverId));
    return rover?.batteryState || null;
  });
  const batteryUrgent = Boolean(batteryState?.urgentActive);
  const batteryLow = Boolean(batteryState?.warnActive || batteryUrgent);
  const docked = Boolean(dockTelemetry?.homeBase);
  const drivingMode = String(dockTelemetry?.oiModeLabel || '').toLowerCase() === 'full';

  const movementDisabled = !roverId
    || !canControl
    || docked
    || dockTelemetry.movementLocked
    || (!drivingMode && !dockTelemetry.cameraLocked);
  // Both controls share the same hardware-availability boundary. Dock assist
  // changes their actions, not who is allowed to command the rover.
  const dockActionDisabled = movementDisabled;

  const handleDockAction = () => {
    if (dockActionDisabled) return;
    triggerTouchHaptic('button');
    // Mobile deliberately enters assist on the first tap. The centered video HUD
    // provides the resulting instruction, so a confirmation modal would only add
    // friction between intent and the camera-guided docking task.
    if (dockTelemetry.cameraLocked) {
      actions.sendCommand('cancelDocking');
    } else {
      actions.sendCommand('enterDocking');
    }
  };

  return (
    <div className="mobile-touch-control flex h-full flex-col gap-0.5 text-slate-100" data-mobile-layout={layout}>
      <button
        type="button"
        disabled={dockActionDisabled}
        onClick={handleDockAction}
        className={`mobile-touch-control flex min-h-18 shrink-0 items-center justify-center gap-1.5 rounded-xl border-2 px-2 text-base font-semibold shadow-md transition disabled:cursor-not-allowed disabled:opacity-50 ${
          dockTelemetry.cameraLocked
            ? 'border-cyan-300/70 bg-cyan-900 text-cyan-50'
            : batteryUrgent
              ? 'border-red-300/80 bg-red-950 text-red-50'
              : batteryLow
                ? 'border-amber-300/80 bg-amber-950 text-amber-50'
                : 'border-indigo-300/70 bg-indigo-900 text-indigo-50'
        }`}
      >
        <FaChargingStation className="text-lg" aria-hidden="true" />
        {/* The mobile column remains the only mobile entry point into dock assist. Battery
            severity makes that existing action more obvious without adding another control. */}
        <span>{dockTelemetry.cameraLocked ? 'Exit dock assist' : batteryUrgent ? 'Dock now' : batteryLow ? 'Dock and charge soon' : 'Dock and charge'}</span>
      </button>
      {/* Keeping the pad mounted prevents the mobile columns from changing size while
          the centered video HUD explains and performs dock-related transitions. */}
      <ControlPadPanel disabled={movementDisabled} />
    </div>
  );
}

export default function MovementColumn({ layout, className = '' }) {
  return (
    <div className={`mobile-touch-control flex flex-col gap-0.5 ${className}`.trim()} data-mobile-layout={layout}>
      <MovementColumnContent layout={layout === 'landscape' ? 'landscape' : 'portrait'} />
    </div>
  );
}