feat(RegionMap): introduce interaction state machine for improved event handling

frontend/src/components/RegionMap.tsx

@@ -12,6 +12,20 @@ import { ListCharacters, StartESILogin, SetDestinationForAll, PostRouteForAllByN
 import { toast } from '@/hooks/use-toast';
 import { getSystemsRegions } from '@/utils/systemApi';
 
+// Interaction/indicator constants
+const SELECT_HOLD_MS = 300;
+const PAN_THRESHOLD_PX = 6;
+const DRAG_SNAP_DISTANCE = 20;
+const VIA_WAYPOINT_RING_RADIUS = 14;
+const VIA_WAYPOINT_RING_COLOR = '#10b981';
+const INDICATED_RING_RADIUS = 20;
+const INDICATED_RING_COLOR = '#f59e0b';
+const INDICATED_RING_ANIM_VALUES = '18;22;18';
+const INDICATED_RING_ANIM_DUR = '1.2s';
+const SHIFT_SELECT_STROKE_COLOR = '#60a5fa';
+const SHIFT_SELECT_FILL_COLOR = 'rgba(96,165,250,0.12)';
+const SHIFT_SELECT_STROKE_WIDTH = 2;
+
 interface RegionMapProps {
   regionName: string;
   focusSystem?: string;
@@ -100,6 +114,22 @@ export const RegionMap = ({ regionName, focusSystem, isCompact = false, isWormho
   const [charLocs, setCharLocs] = useState<Array<{ character_id: number; character_name: string; solar_system_name: string }>>([]);
   const [focusUntil, setFocusUntil] = useState<number | null>(null);
 
+  // New: selection/aim state for left-click aimbot behavior
+  const [isSelecting, setIsSelecting] = useState(false);
+  const [indicatedSystem, setIndicatedSystem] = useState<string | null>(null);
+  const selectTimerRef = useRef<number | null>(null);
+  const downClientPointRef = useRef<{ x: number; y: number } | null>(null);
+  const mouseButtonRef = useRef<number | null>(null);
+
+  // New: shift-drag circle selection state (VIA mode)
+  const [shiftSelecting, setShiftSelecting] = useState(false);
+  const [shiftCenter, setShiftCenter] = useState<Position | null>(null);
+  const [shiftRadius, setShiftRadius] = useState<number>(0);
+
+  // Interaction state machine (lightweight)
+  type InteractionMode = 'idle' | 'holding' | 'panning' | 'selecting' | 'shiftSelecting';
+  const [mode, setMode] = useState<InteractionMode>('idle');
+
   // When focusSystem changes, set an expiry 20s in the future
   useEffect(() => {
     if (focusSystem) {
@@ -296,12 +326,17 @@ export const RegionMap = ({ regionName, focusSystem, isCompact = false, isWormho
   const handleSystemClick = async (systemName: string) => {
     if (viaMode) {
       setViaQueue(prev => {
-        if (prev.includes(systemName)) return prev;
+        // toggle behavior: add if missing, remove if present
+        if (prev.includes(systemName)) {
+          const next = prev.filter(n => n !== systemName);
+          toast({ title: 'Waypoint removed', description: systemName });
+          return next;
+        }
         const next = [...prev, systemName];
+        toast({ title: 'Waypoint queued', description: systemName });
         return next;
       });
-      console.log('Queued waypoint:', systemName);
-      toast({ title: 'Waypoint queued', description: systemName });
+      console.log('VIA waypoint toggle:', systemName);
       return;
     }
     if (focusSystem === systemName) return;
@@ -381,7 +416,7 @@ export const RegionMap = ({ regionName, focusSystem, isCompact = false, isWormho
       const dx = system.x - x;
       const dy = system.y - y;
       const distance = Math.sqrt(dx * dx + dy * dy);
-      if (distance < 20) {
+      if (distance < DRAG_SNAP_DISTANCE) {
         targetSystem = system;
       }
     });
@@ -437,24 +472,265 @@ export const RegionMap = ({ regionName, focusSystem, isCompact = false, isWormho
     setTempConnection(null);
   };
 
+  // Helper: convert client to SVG coords
+  const clientToSvg = (clientX: number, clientY: number) => {
+    if (!svgRef.current) return { x: 0, y: 0 };
+    const pt = svgRef.current.createSVGPoint();
+    pt.x = clientX;
+    pt.y = clientY;
+    const svgPoint = pt.matrixTransform(svgRef.current.getScreenCTM()!.inverse());
+    return { x: svgPoint.x, y: svgPoint.y };
+  };
+
+  // Helper: find nearest system name to SVG point
+  const findNearestSystem = (svgX: number, svgY: number): string | null => {
+    if (systems.size === 0) return null;
+    let nearestName: string | null = null;
+    let nearestDist2 = Number.POSITIVE_INFINITY;
+    systems.forEach((_sys, name) => {
+      const pos = positions[name];
+      if (!pos) return;
+      const dx = pos.x - svgX;
+      const dy = pos.y - svgY;
+      const d2 = dx * dx + dy * dy;
+      if (d2 < nearestDist2) {
+        nearestDist2 = d2;
+        nearestName = name;
+      }
+    });
+    return nearestName;
+  };
+
+  // Commit shift selection: toggle all systems within radius
+  const commitShiftSelection = useCallback(() => {
+    if (!shiftCenter || shiftRadius <= 0) return;
+    const within: string[] = [];
+    Object.keys(positions).forEach(name => {
+      const pos = positions[name];
+      if (!pos) return;
+      const dx = pos.x - shiftCenter.x;
+      const dy = pos.y - shiftCenter.y;
+      const dist = Math.sqrt(dx * dx + dy * dy);
+      if (dist <= shiftRadius) within.push(name);
+    });
+    if (within.length === 0) return;
+    setViaQueue(prev => {
+      const prevSet = new Set(prev);
+      const toToggle = new Set(within);
+      // remove toggled ones that were present
+      const kept = prev.filter(n => !toToggle.has(n));
+      // add new ones (those within but not previously present), preserve within order
+      const additions = within.filter(n => !prevSet.has(n));
+      const next = kept.concat(additions);
+      toast({ title: 'VIA toggled', description: `${within.length} systems` });
+      return next;
+    });
+  }, [positions, shiftCenter, shiftRadius]);
+
+  const clearSelectTimer = () => {
+    if (selectTimerRef.current !== null) {
+      window.clearTimeout(selectTimerRef.current);
+      selectTimerRef.current = null;
+    }
+  };
+
+  // const PAN_THRESHOLD_PX = 6; // movement before starting pan
+
   const handleMouseDown = useCallback((e: React.MouseEvent) => {
     if (!svgRef.current) return;
-    setIsPanning(true);
+
+    // If context menu is open, left-click closes it and no selection should happen
+    if (contextMenu) {
+      if (e.button === 0) setContextMenu(null);
+      clearSelectTimer();
+      setIsSelecting(false);
+      setIsPanning(false);
+      setShiftSelecting(false);
+      setMode('idle');
+      return;
+    }
+
+    mouseButtonRef.current = e.button;
+
+    // SHIFT + VIA mode: start circle selection (left button only)
+    if (viaMode && e.shiftKey && e.button === 0) {
+      e.preventDefault();
+      e.stopPropagation();
+      const svgPt = clientToSvg(e.clientX, e.clientY);
+      setShiftSelecting(true);
+      setShiftCenter(svgPt);
+      setShiftRadius(0);
+      setMode('shiftSelecting');
+      // cancel any hold-to-select/pan intents
+      setIsSelecting(false);
+      setIsPanning(false);
+      clearSelectTimer();
+      downClientPointRef.current = { x: e.clientX, y: e.clientY };
+      return;
+    }
+
+    // Only left button initiates selection/panning
+    if (e.button !== 0) {
+      clearSelectTimer();
+      setIsSelecting(false);
+      setMode('idle');
+      return;
+    }
+
+    // record down point (client) and seed pan origin
     const rect = svgRef.current.getBoundingClientRect();
     setLastPanPoint({ x: e.clientX - rect.left, y: e.clientY - rect.top });
-  }, []);
+    downClientPointRef.current = { x: e.clientX, y: e.clientY };
+
+    // initial indicate nearest system under cursor
+    const svgPt = clientToSvg(e.clientX, e.clientY);
+    const near = findNearestSystem(svgPt.x, svgPt.y);
+    setIndicatedSystem(near);
+
+    // start delayed select mode timer
+    setIsSelecting(false);
+    setMode('holding');
+    clearSelectTimer();
+    selectTimerRef.current = window.setTimeout(() => {
+      setIsSelecting(true);
+      setMode('selecting');
+    }, SELECT_HOLD_MS);
+  }, [positions, systems, viaMode, contextMenu]);
 
   const handleMouseMove = useCallback((e: React.MouseEvent) => {
-    if (!isPanning || !svgRef.current) return;
-    const rect = svgRef.current.getBoundingClientRect();
-    const currentPoint = { x: e.clientX - rect.left, y: e.clientY - rect.top };
-    const deltaX = (lastPanPoint.x - currentPoint.x) * (viewBox.width / rect.width);
-    const deltaY = (lastPanPoint.y - currentPoint.y) * (viewBox.height / rect.height);
-    setViewBox(prev => ({ ...prev, x: prev.x + deltaX, y: prev.y + deltaY }));
-    setLastPanPoint(currentPoint);
-  }, [isPanning, lastPanPoint, viewBox.width, viewBox.height]);
+    // if dragging node, delegate
+    if (draggingNode) { handleSvgMouseMove(e); return; }
 
-  const handleMouseUp = useCallback(() => { setIsPanning(false); }, []);
+    if (!svgRef.current) return;
+
+    // Shift selection radius update
+    if (shiftSelecting && shiftCenter) {
+      const svgPt = clientToSvg(e.clientX, e.clientY);
+      const dx = svgPt.x - shiftCenter.x;
+      const dy = svgPt.y - shiftCenter.y;
+      setShiftRadius(Math.sqrt(dx * dx + dy * dy));
+      setMode('shiftSelecting');
+      return;
+    }
+
+    const rect = svgRef.current.getBoundingClientRect();
+
+    if (isPanning) {
+      const currentPoint = { x: e.clientX - rect.left, y: e.clientY - rect.top };
+      const deltaX = (lastPanPoint.x - currentPoint.x) * (viewBox.width / rect.width);
+      const deltaY = (lastPanPoint.y - currentPoint.y) * (viewBox.height / rect.height);
+      setViewBox(prev => ({ ...prev, x: prev.x + deltaX, y: prev.y + deltaY }));
+      setLastPanPoint(currentPoint);
+      setMode('panning');
+      return;
+    }
+
+    // determine if we should start panning (from holding)
+    const down = downClientPointRef.current;
+    if (down && !isSelecting) {
+      const dx = e.clientX - down.x;
+      const dy = e.clientY - down.y;
+      const dist2 = dx * dx + dy * dy;
+      if (dist2 > PAN_THRESHOLD_PX * PAN_THRESHOLD_PX) {
+        // user intends to pan; cancel selection
+        clearSelectTimer();
+        setIsSelecting(false);
+        setIndicatedSystem(null);
+        setIsPanning(true);
+        setMode('panning');
+        // seed pan origin with current
+        const currentPoint = { x: e.clientX - rect.left, y: e.clientY - rect.top };
+        setLastPanPoint(currentPoint);
+        return;
+      }
+    }
+
+    // selection mode: update indicated nearest system as cursor moves
+    if (isSelecting) {
+      const svgPt = clientToSvg(e.clientX, e.clientY);
+      const near = findNearestSystem(svgPt.x, svgPt.y);
+      setIndicatedSystem(near);
+      setMode('selecting');
+    }
+  }, [draggingNode, isPanning, lastPanPoint, viewBox.width, viewBox.height, isSelecting, positions, systems, shiftSelecting, shiftCenter]);
+
+  const handleMouseUp = useCallback((e?: React.MouseEvent) => {
+    // if dragging node, delegate
+    if (draggingNode) { if (e) handleSvgMouseUp(e); return; }
+
+    // If context menu open, left click should just close it; do not select
+    if (contextMenu && mouseButtonRef.current === 0) {
+      setContextMenu(null);
+      clearSelectTimer();
+      setIsPanning(false);
+      setIsSelecting(false);
+      setIndicatedSystem(null);
+      setShiftSelecting(false);
+      setShiftCenter(null);
+      setShiftRadius(0);
+      downClientPointRef.current = null;
+      mouseButtonRef.current = null;
+      setMode('idle');
+      return;
+    }
+
+    // Commit shift selection if active (only if left button initiated)
+    if (shiftSelecting) {
+      if (mouseButtonRef.current === 0) {
+        commitShiftSelection();
+      }
+      setShiftSelecting(false);
+      setShiftCenter(null);
+      setShiftRadius(0);
+      clearSelectTimer();
+      setIsPanning(false);
+      setIsSelecting(false);
+      setIndicatedSystem(null);
+      downClientPointRef.current = null;
+      mouseButtonRef.current = null;
+      setMode('idle');
+      return;
+    }
+
+    // Ignore non-left button for selection commit
+    if (mouseButtonRef.current !== 0) {
+      clearSelectTimer();
+      setIsPanning(false);
+      setIsSelecting(false);
+      setIndicatedSystem(null);
+      downClientPointRef.current = null;
+      mouseButtonRef.current = null;
+      setMode('idle');
+      return;
+    }
+
+    clearSelectTimer();
+
+    if (isPanning) {
+      setIsPanning(false);
+      mouseButtonRef.current = null;
+      setMode('idle');
+      return;
+    }
+
+    // commit selection if any
+    let target = indicatedSystem;
+    if (!target && e && svgRef.current) {
+      const svgPt = clientToSvg(e.clientX, e.clientY);
+      target = findNearestSystem(svgPt.x, svgPt.y);
+    }
+
+    if (target) {
+      handleSystemClick(target);
+    }
+
+    // reset selection state
+    setIsSelecting(false);
+    setIndicatedSystem(null);
+    downClientPointRef.current = null;
+    mouseButtonRef.current = null;
+    setMode('idle');
+  }, [draggingNode, isPanning, indicatedSystem, positions, systems, shiftSelecting, commitShiftSelection, contextMenu]);
 
   const handleWheel = useCallback((e: React.WheelEvent) => {
     e.preventDefault();
@@ -622,6 +898,27 @@ export const RegionMap = ({ regionName, focusSystem, isCompact = false, isWormho
     return () => document.removeEventListener('click', handleClickOutside);
   }, []);
 
+  useEffect(() => {
+    const onWindowMouseUp = () => {
+      // if shift selection ongoing, commit on global mouseup as well
+      if (shiftSelecting && mouseButtonRef.current === 0) {
+        commitShiftSelection();
+      }
+      clearSelectTimer();
+      setIsPanning(false);
+      setIsSelecting(false);
+      setIndicatedSystem(null);
+      setShiftSelecting(false);
+      setShiftCenter(null);
+      setShiftRadius(0);
+      downClientPointRef.current = null;
+      mouseButtonRef.current = null;
+      setMode('idle');
+    };
+    window.addEventListener('mouseup', onWindowMouseUp);
+    return () => window.removeEventListener('mouseup', onWindowMouseUp);
+  }, [shiftSelecting, commitShiftSelection]);
+
   if (isLoading) {
     return (
       <div className="h-full w-full bg-gradient-to-br from-slate-900 via-slate-800 to-slate-900 flex items-center justify-center">
@@ -655,10 +952,10 @@ export const RegionMap = ({ regionName, focusSystem, isCompact = false, isWormho
         width="100%"
         height="100%"
         viewBox={`${viewBox.x} ${viewBox.y} ${viewBox.width} ${viewBox.height}`}
-        className="cursor-grab active:cursor-grabbing"
+        className={`${(mode === 'selecting' || mode === 'shiftSelecting') ? 'cursor-crosshair' : (mode === 'panning' ? 'cursor-grabbing' : 'cursor-grab')}`}
         onMouseDown={handleMouseDown}
-        onMouseMove={(e) => { if (isPanning) { handleMouseMove(e); } else if (draggingNode) { handleSvgMouseMove(e); } }}
-        onMouseUp={(e) => { if (isPanning) { handleMouseUp(); } else if (draggingNode) { handleSvgMouseUp(e); } }}
+        onMouseMove={handleMouseMove}
+        onMouseUp={(e) => handleMouseUp(e)}
         onMouseLeave={handleMouseUp}
         onWheel={handleWheel}
         onDoubleClick={handleMapDoubleClick}
@@ -696,6 +993,20 @@ export const RegionMap = ({ regionName, focusSystem, isCompact = false, isWormho
           />
         )}
 
+        {/* Shift selection circle (VIA mode) */}
+        {shiftSelecting && shiftCenter && (
+          <g style={{ pointerEvents: 'none' }}>
+            <circle
+              cx={shiftCenter.x}
+              cy={shiftCenter.y}
+              r={Math.max(shiftRadius, 0)}
+              fill={SHIFT_SELECT_FILL_COLOR}
+              stroke={SHIFT_SELECT_STROKE_COLOR}
+              strokeWidth={SHIFT_SELECT_STROKE_WIDTH}
+            />
+          </g>
+        )}
+
         {/* Render existing systems */}
         {Array.from(systems.entries()).map(([key, system]) => (
           <MapNode
@@ -703,7 +1014,7 @@ export const RegionMap = ({ regionName, focusSystem, isCompact = false, isWormho
             id={system.solarSystemName}
             name={system.solarSystemName}
             position={positions[system.solarSystemName] || { x: 0, y: 0 }}
-            onClick={() => handleSystemClick(system.solarSystemName)}
+            onClick={() => { /* handled at svg-level aimbot commit */ }}
             onDoubleClick={(e) => handleSystemDoubleClick(e, positions[system.solarSystemName])}
             onDragStart={(e) => handleNodeDragStart(e, system.solarSystemName)}
             onDrag={handleSvgMouseMove}
@@ -717,6 +1028,42 @@ export const RegionMap = ({ regionName, focusSystem, isCompact = false, isWormho
           />
         ))}
 
+        {/* VIA waypoints indicator rings */}
+        {viaMode && viaQueue.map((name) => (
+          positions[name] ? (
+            <g key={`via-${name}`} style={{ pointerEvents: 'none' }}>
+              <circle
+                cx={positions[name].x}
+                cy={positions[name].y}
+                r={VIA_WAYPOINT_RING_RADIUS}
+                fill="none"
+                stroke={VIA_WAYPOINT_RING_COLOR}
+                strokeWidth="3"
+                opacity="0.9"
+                filter="url(#glow)"
+              />
+            </g>
+          ) : null
+        ))}
+
+        {/* Indicated (aim) system ring */}
+        {indicatedSystem && positions[indicatedSystem] && (
+          <g style={{ pointerEvents: 'none' }}>
+            <circle
+              cx={positions[indicatedSystem].x}
+              cy={positions[indicatedSystem].y}
+              r={INDICATED_RING_RADIUS}
+              fill="none"
+              stroke={INDICATED_RING_COLOR}
+              strokeWidth="3"
+              opacity="0.9"
+              filter="url(#glow)"
+            >
+              <animate attributeName="r" values={INDICATED_RING_ANIM_VALUES} dur={INDICATED_RING_ANIM_DUR} repeatCount="indefinite" />
+            </circle>
+          </g>
+        )}
+
         {/* Character location markers */}
         {charLocs.map((c, idx) => {
           const pos = positions[c.solar_system_name];