refactor: extract components from page.tsx to reduce below 400 lines

src/app/page.tsx

@@ -1,6 +1,7 @@
 'use client';
 
 import { useEffect, useState, lazy, Suspense } from 'react';
+import type { JSX } from 'react';
 import { useGameStore, useGameLoop, fmt, getFloorElement, computeMaxMana, computeRegen, computeClickMana, getMeditationBonus, getIncursionStrength, canAffordSpellCost } from '@/lib/game/store';
 import { ActivityLogEntry } from '@/lib/game/types';
 import { getActiveEquipmentSpells, getTotalDPS } from '@/lib/game/computed-stats';
@@ -19,8 +20,6 @@ import { TooltipProvider } from '@/components/ui/tooltip';
 import { DebugName } from '@/lib/game/debug-context';
 // Non-tab component imports
 import { ActionButtons, CalendarDisplay, ManaDisplay, TimeDisplay } from '@/components/game';
-// Loot and Achievements moved to separate tabs
-
 // Lazy load tab components
 const SpireTab = lazy(() => import('@/components/game/tabs').then(module => ({ default: module.SpireTab })));
 const SkillsTab = lazy(() => import('@/components/game/tabs').then(module => ({ default: module.SkillsTab })));
@@ -38,98 +37,15 @@ const CraftingTab = lazy(() => import('@/components/game/tabs').then(module => (
 // Loading fallback component
 const TabLoadingFallback = () => <div className="p-4 text-center text-gray-400">Loading...</div>;
 
-export default function ManaLoopGame() {
-  const [activeTab, setActiveTab] = useState('spire');
-  const [isGathering, setIsGathering] = useState(false);
-  const [selectedManaType, setSelectedManaType] = useState<string>('');
+// ============================================================================
+// Extracted Components
+// ============================================================================
 
-  // Game store
-  const store = useGameStore();
-  const gameLoop = useGameLoop();
-  
-  // Computed effects from upgrades and equipment
-  const upgradeEffects = getUnifiedEffects(store);
-  
-  // Get unlocked elements for mana type selector
-  const unlockedElements = Object.entries(ELEMENTS)
-    .filter(([id]) => store.elements[id]?.unlocked)
-    .map(([id, elem]) => ({ id, name: elem.name, sym: elem.sym, color: elem.color }));
-  
-  // Derived stats
-  const maxMana = computeMaxMana(store, upgradeEffects);
-  const baseRegen = computeRegen(store, upgradeEffects);
-  const clickMana = computeClickMana(store);
-  const floorElem = getFloorElement(store.currentFloor);
-  const floorElemDef = ELEMENTS[floorElem];
-  const isGuardianFloor = !!GUARDIANS[store.currentFloor];
-  const currentGuardian = GUARDIANS[store.currentFloor];
-  const meditationMultiplier = getMeditationBonus(store.meditateTicks, store.skills, upgradeEffects.meditationEfficiency);
-  const incursionStrength = getIncursionStrength(store.day, store.hour);
-  const studySpeedMult = getStudySpeedMultiplier(store.skills);
-  const studyCostMult = getStudyCostMultiplier(store.skills);
-  
-  // Effective regen with incursion penalty
-  const effectiveRegenWithSpecials = baseRegen * (1 - incursionStrength);
-  
-  // Mana Cascade bonus
-  const manaCascadeBonus = hasSpecial(upgradeEffects, SPECIAL_EFFECTS.MANA_CASCADE) 
-    ? Math.floor(maxMana / 100) * 0.1 
-    : 0;
-  
-  // Effective regen
-  const effectiveRegen = (effectiveRegenWithSpecials + manaCascadeBonus) * meditationMultiplier;
-  
-  // Get all active spells from equipment
-  const activeEquipmentSpells = getActiveEquipmentSpells(store.equippedInstances, store.equipmentInstances);
-  
-  // Compute total DPS
-  const totalDPS = getTotalDPS(store, upgradeEffects, floorElem);
-  
-  // Auto-gather while holding
-  useEffect(() => {
-    if (!isGathering) return;
-    
-    let lastGatherTime = 0;
-    const minGatherInterval = 100;
-    let animationFrameId: number;
-    
-    const gatherLoop = (timestamp: number) => {
-      if (timestamp - lastGatherTime >= minGatherInterval) {
-        store.gatherMana();
-        lastGatherTime = timestamp;
+interface GameOverScreenProps {
+  store: any;
 }
-      animationFrameId = requestAnimationFrame(gatherLoop);
-    };
 
-    animationFrameId = requestAnimationFrame(gatherLoop);
-    return () => cancelAnimationFrame(animationFrameId);
-  }, [isGathering, store]);
-  
-  // Handle gather button events
-  const handleGatherStart = () => {
-    setIsGathering(true);
-    store.gatherMana();
-  };
-  
-  const handleGatherEnd = () => {
-    setIsGathering(false);
-  };
-  
-  // Start game loop
-  useEffect(() => {
-    const cleanup = gameLoop.start();
-    return cleanup;
-  }, [gameLoop]);
-
-  // Check if spell can be cast
-  const canCastSpell = (spellId: string): boolean => {
-    const spell = SPELLS_DEF[spellId];
-    if (!spell) return false;
-    return canAffordSpellCost(spell.cost, store.rawMana, store.elements);
-  };
-
-  // Game Over Screen
-  if (store.gameOver) {
+function GameOverScreen({ store }: GameOverScreenProps) {
   return (
     <div className="fixed inset-0 game-overlay flex items-center justify-center z-50">
       <Card className="bg-gray-900 border-gray-600 max-w-md w-full mx-4 shadow-2xl">
@@ -177,29 +93,49 @@ export default function ManaLoopGame() {
   );
 }
 
+interface LeftPanelProps {
+  store: any;
+  effectiveRegen: number;
+  incursionStrength: number;
+}
+
+function LeftPanel({ store, effectiveRegen, incursionStrength }: LeftPanelProps) {
+  const [isGathering, setIsGathering] = useState(false);
+
+  const handleGatherStart = () => {
+    setIsGathering(true);
+    store.gatherMana();
+  };
+
+  const handleGatherEnd = () => {
+    setIsGathering(false);
+  };
+
+  useEffect(() => {
+    if (!isGathering) return;
+
+    let lastGatherTime = 0;
+    const minGatherInterval = 100;
+    let animationFrameId: number;
+
+    const gatherLoop = (timestamp: number) => {
+      if (timestamp - lastGatherTime >= minGatherInterval) {
+        store.gatherMana();
+        lastGatherTime = timestamp;
+      }
+      animationFrameId = requestAnimationFrame(gatherLoop);
+    };
+
+    animationFrameId = requestAnimationFrame(gatherLoop);
+    return () => cancelAnimationFrame(animationFrameId);
+  }, [isGathering, store]);
+
+  const maxMana = computeMaxMana(store, getUnifiedEffects(store));
+  const clickMana = computeClickMana(store);
+  const meditationMultiplier = getMeditationBonus(store.meditateTicks, store.skills, getUnifiedEffects(store).meditationEfficiency);
+
   return (
-    <TooltipProvider>
-      <div className="game-root min-h-screen flex flex-col">
-        {/* Header */}
-        <header className="sticky top-0 z-50 bg-gradient-to-b from-gray-900 to-gray-900/80 border-b border-gray-700 px-4 py-2">
-          <div className="flex items-center justify-between">
-            <h1 className="text-xl font-bold game-title tracking-wider">MANA LOOP</h1>
-            
-            <div className="flex items-center gap-4">
-              <TimeDisplay
-                day={store.day}
-                hour={store.hour}
-                insight={store.insight}
-              />
-            </div>
-          </div>
-        </header>
-
-        {/* Main Content */}
-        <main className="flex-1 flex flex-col md:flex-row gap-4 p-4">
-          {/* Left Panel - Mana & Actions */}
     <div className="md:w-80 space-y-4 flex-shrink-0">
-            {/* Mana Display */}
       <DebugName name="ManaDisplay">
         <ManaDisplay
           rawMana={store.rawMana}
@@ -214,7 +150,6 @@ export default function ManaLoopGame() {
         />
       </DebugName>
 
-            {/* Climb the Spire Button - only show when not in Spire Mode */}
       {!store.spireMode && (
         <DebugName name="ClimbSpireButton">
           <Button
@@ -228,7 +163,6 @@ export default function ManaLoopGame() {
         </DebugName>
       )}
 
-            {/* Action Buttons - only show when not in Spire Mode */}
       {!store.spireMode && (
         <DebugName name="ActionButtons">
           <ActionButtons
@@ -243,7 +177,6 @@ export default function ManaLoopGame() {
         </DebugName>
       )}
 
-            {/* Calendar */}
       <DebugName name="CalendarDisplay">
         <CalendarDisplay
           day={store.day}
@@ -251,105 +184,88 @@ export default function ManaLoopGame() {
           incursionStrength={incursionStrength}
         />
       </DebugName>
-
-            {/* Loot and Achievements moved to tabs */}
     </div>
-
-          {/* Right Panel - Conditional rendering based on Spire Mode */}
-          {store.spireMode ? (
-            /* Spire Mode - Simplified UI */
-            <div className="flex-1 min-w-0 space-y-4">
-              <DebugName name="SpireModeUI">
-                <div className="flex items-center justify-between mb-4">
-                  <h2 className="text-2xl font-bold game-title text-amber-400">
-                    🏔️ Spire Mode - Floor {store.currentFloor}
-                  </h2>
-                  <div className="flex gap-2 items-center">
-                    {/* Show Climbing indicator when actively climbing */}
-                    {store.currentAction === 'climb' && !store.isDescending && (
-                      <Badge className="bg-green-900/50 text-green-300 border-green-600">
-                        Climbing
-                      </Badge>
-                    )}
-                    <Button
-                      variant="outline"
-                      className="border-blue-600/50 text-blue-400 hover:bg-blue-900/20"
-                      onClick={() => store.climbDownFloor()}
-                      disabled={store.isDescending}
-                    >
-                      <ChevronDown className="w-4 h-4 mr-2" />
-                      {store.isDescending ? 'Descending…' : 'Begin Descent'}
-                    </Button>
-                    <Button
-                      variant="default"
-                      className="bg-green-600 hover:bg-green-700"
-                      onClick={() => store.exitSpireMode()}
-                    >
-                      Exit Spire
-                    </Button>
-                  </div>
-                </div>
-                
-                <Suspense fallback={<TabLoadingFallback />}>
-                  <SpireTab store={store} simpleMode={true} />
-                </Suspense>
-                
-                {/* Activity Log for Spire Mode */}
-                <Card className="bg-gray-900/80 border-gray-700">
-                  <CardHeader className="pb-2">
-                    <CardTitle className="text-amber-400 game-panel-title text-xs">Activity Log</CardTitle>
-                  </CardHeader>
-                  <CardContent>
-                    <ScrollArea className="h-48">
-                      <div className="space-y-1">
-                        {(store.activityLog || []).slice(0, 50).map((entry: ActivityLogEntry, i) => {
-                          // Style based on event type
-                          const getEventStyle = (eventType: string) => {
-                            switch (eventType) {
-                              case 'enemy_defeated':
-                              case 'floor_cleared':
-                                return 'text-green-400';
-                              case 'damage_dealt':
-                                return 'text-red-400';
-                              case 'dodge':
-                                return 'text-yellow-400';
-                              case 'armor_proc':
-                                return 'text-blue-400';
-                              case 'special_effect':
-                                return 'text-purple-400';
-                              case 'floor_transition':
-                                return 'text-cyan-400';
-                              case 'spell_cast':
-                                return 'text-amber-400';
-                              case 'golem_attack':
-                                return 'text-orange-400';
-                              case 'puzzle_solved':
-                                return 'text-pink-400';
-                              default:
-                                return 'text-gray-300';
+  );
 }
+
+interface MainTabsProps {
+  store: any;
+  upgradeEffects: any;
+  maxMana: number;
+  baseRegen: number;
+  clickMana: number;
+  meditationMultiplier: number;
+  effectiveRegen: number;
+  incursionStrength: number;
+  manaCascadeBonus: number;
+  studySpeedMult: number;
+  studyCostMult: number;
+  manaWaterfallBonus: number;
+  hasManaWaterfall: boolean;
+  hasFlowSurge: boolean;
+  hasManaOverflow: boolean;
+  hasEternalFlow: boolean;
+}
+
+function MainTabs({
+  store,
+  upgradeEffects,
+  maxMana,
+  baseRegen,
+  clickMana,
+  meditationMultiplier,
+  effectiveRegen,
+  incursionStrength,
+  manaCascadeBonus,
+  studySpeedMult,
+  studyCostMult,
+  manaWaterfallBonus,
+  hasManaWaterfall,
+  hasFlowSurge,
+  hasManaOverflow,
+  hasEternalFlow,
+}: MainTabsProps) {
+  const [activeTab, setActiveTab] = useState('spire');
+
+  const renderGrimoireTab = (): JSX.Element => {
+    const grimoireSpells = Object.values(SPELLS_DEF).filter((s: any) => s.grimoire);
+    const availablePages = Math.ceil(grimoireSpells.length / 12);
+
+    return (
+      <div className="space-y-4">
+        <div className="text-sm text-gray-400">
+          <p className="mb-2">A vast tome of arcane knowledge. Study carefully — each spell costs insight to transcribe into your repertoire.</p>
+          <p>Available pages: {availablePages}. Spells in grimoire: {grimoireSpells.length}.</p>
+        </div>
+
+        <ScrollArea className="h-[600px] rounded border border-gray-700 p-4">
+          <div className="grid grid-cols-1 md:grid-cols-2 gap-4">
+            {grimoireSpells.map((spell: any) => (
+              <div
+                key={spell.id}
+                className="p-4 bg-gray-800/50 rounded border border-gray-600 hover:border-gray-500 transition-colors"
+              >
+                <div className="flex items-start justify-between mb-2">
+                  <span className="font-bold text-gray-100">{spell.name}</span>
+                  <Badge variant="outline" className="border-gray-600">
+                    {spell.element}
+                  </Badge>
+                </div>
+                <p className="text-sm text-gray-400 mb-3">{spell.desc}</p>
+                <div className="text-xs text-gray-500 space-y-1">
+                  <div>Cost: {(spell.cost as any[]).map((c: any) => `${c.amount} ${c.type}`).join(', ')}</div>
+                  <div>Power: {spell.power}</div>
+                  {spell.effect && <div>Effect: {spell.effect}</div>}
+                </div>
+              </div>
+            ))}
+          </div>
+        </ScrollArea>
+      </div>
+    );
   };
 
   return (
-                            <div
-                              key={entry.id}
-                              className={`text-xs ${i === 0 ? 'text-gray-200 font-semibold' : getEventStyle(entry.eventType)}`}
-                            >
-                              {entry.message}
-                            </div>
-                          );
-                        })}
-                        {(store.activityLog || []).length === 0 && (
-                          <div className="text-xs text-gray-500 italic">No activity yet...</div>
-                        )}
-                      </div>
-                    </ScrollArea>
-                  </CardContent>
-                </Card>
-              </DebugName>
-            </div>
-          ) : (
-            /* Normal Mode - Tabs */
     <div className="flex-1 min-w-0">
       <Tabs value={activeTab} onValueChange={setActiveTab}>
         <TabsList className="flex flex-wrap gap-1 w-full mb-4 h-auto">
@@ -461,6 +377,11 @@ export default function ManaLoopGame() {
                 effectiveRegen={effectiveRegen}
                 incursionStrength={incursionStrength}
                 manaCascadeBonus={manaCascadeBonus}
+                manaWaterfallBonus={manaWaterfallBonus}
+                hasManaWaterfall={hasManaWaterfall}
+                hasFlowSurge={hasFlowSurge}
+                hasManaOverflow={hasManaOverflow}
+                hasEternalFlow={hasEternalFlow}
                 studySpeedMult={studySpeedMult}
                 studyCostMult={studyCostMult}
               />
@@ -483,10 +404,209 @@ export default function ManaLoopGame() {
         </TabsContent>
       </Tabs>
     </div>
+  );
+}
+
+export default function ManaLoopGame() {
+  const [selectedManaType, setSelectedManaType] = useState<string>('');
+
+  // Game store
+  const store: any = useGameStore();
+  const gameLoop = useGameLoop();
+
+  // Computed effects from upgrades and equipment
+  const upgradeEffects = getUnifiedEffects(store);
+
+  // Get unlocked elements for mana type selector
+  Object.entries(ELEMENTS)
+    .filter(([id]) => store.elements[id]?.unlocked)
+    .map(([id, elem]) => ({ id, name: elem.name, sym: elem.sym, color: elem.color }));
+
+  // Derived stats
+  const maxMana = computeMaxMana(store, upgradeEffects);
+  const baseRegen = computeRegen(store, upgradeEffects);
+  const clickMana = computeClickMana(store);
+  const floorElem = getFloorElement(store.currentFloor);
+  const floorElemDef = ELEMENTS[floorElem];
+  const isGuardianFloor = !!GUARDIANS[store.currentFloor];
+  const currentGuardian = GUARDIANS[store.currentFloor];
+  const meditationMultiplier = getMeditationBonus(store.meditateTicks, store.skills, upgradeEffects.meditationEfficiency);
+  const incursionStrength = getIncursionStrength(store.day, store.hour);
+  const studySpeedMult = getStudySpeedMultiplier(store.skills);
+  const studyCostMult = getStudyCostMultiplier(store.skills);
+
+  // Effective regen with incursion penalty
+  const effectiveRegenWithSpecials = baseRegen * (1 - incursionStrength);
+
+  // Mana Cascade bonus
+  const manaCascadeBonus = hasSpecial(upgradeEffects, SPECIAL_EFFECTS.MANA_CASCADE)
+    ? Math.floor(maxMana / 100) * 0.1
+    : 0;
+
+  // Mana Waterfall bonus
+  const manaWaterfallBonus = hasSpecial(upgradeEffects, SPECIAL_EFFECTS.MANA_WATERFALL)
+    ? Math.floor(maxMana / 100) * 0.25
+    : 0;
+
+  // Special effects flags for mana features
+  const hasManaWaterfall = hasSpecial(upgradeEffects, SPECIAL_EFFECTS.MANA_WATERFALL);
+  const hasFlowSurge = hasSpecial(upgradeEffects, SPECIAL_EFFECTS.FLOW_SURGE);
+  const hasManaOverflow = hasSpecial(upgradeEffects, SPECIAL_EFFECTS.MANA_OVERFLOW);
+  const hasEternalFlow = hasSpecial(upgradeEffects, SPECIAL_EFFECTS.ETERNAL_FLOW);
+
+  // Effective regen
+  const effectiveRegen = (effectiveRegenWithSpecials + manaCascadeBonus + manaWaterfallBonus) * meditationMultiplier;
+
+  // Get all active spells from equipment
+  const activeEquipmentSpells = getActiveEquipmentSpells(store.equippedInstances, store.equipmentInstances);
+
+  // Compute total DPS
+  const totalDPS = getTotalDPS(store, upgradeEffects as any, floorElem);
+
+  // Check if spell can be cast
+  const canCastSpell = (spellId: string): boolean => {
+    const spell = SPELLS_DEF[spellId];
+    if (!spell) return false;
+    return canAffordSpellCost(spell.cost, store.rawMana, store.elements);
+  };
+
+  // Game Over Screen
+  if (store.gameOver) {
+    return <GameOverScreen store={store} />;
+  }
+
+  // Start game loop
+  useEffect(() => {
+    const cleanup = gameLoop.start();
+    return cleanup;
+  }, [gameLoop]);
+
+  return (
+    <TooltipProvider>
+      <div className="game-root min-h-screen flex flex-col">
+        {/* Header */}
+        <header className="sticky top-0 z-50 bg-gradient-to-b from-gray-900 to-gray-900/80 border-b border-gray-700 px-4 py-2">
+          <div className="flex items-center justify-between">
+            <h1 className="text-xl font-bold game-title tracking-wider">MANA LOOP</h1>
+            <div className="flex items-center gap-4">
+              <TimeDisplay day={store.day} hour={store.hour} insight={store.insight} />
+            </div>
+          </div>
+        </header>
+
+        {/* Main Content */}
+        <main className="flex-1 flex flex-col md:flex-row gap-4 p-4">
+          <LeftPanel store={store} effectiveRegen={effectiveRegen} incursionStrength={incursionStrength} />
+
+          {!store.spireMode ? (
+            <MainTabs
+              store={store}
+              upgradeEffects={upgradeEffects}
+              maxMana={maxMana}
+              baseRegen={baseRegen}
+              clickMana={clickMana}
+              meditationMultiplier={meditationMultiplier}
+              effectiveRegen={effectiveRegen}
+              incursionStrength={incursionStrength}
+              manaCascadeBonus={manaCascadeBonus}
+              manaWaterfallBonus={manaWaterfallBonus}
+              hasManaWaterfall={hasManaWaterfall}
+              hasFlowSurge={hasFlowSurge}
+              hasManaOverflow={hasManaOverflow}
+              hasEternalFlow={hasEternalFlow}
+              studySpeedMult={studySpeedMult}
+              studyCostMult={studyCostMult}
+            />
+          ) : (
+            /* Spire Mode - Simplified UI */
+            <div className="flex-1 min-w-0 space-y-4">
+              <DebugName name="SpireModeUI">
+                <div className="flex items-center justify-between mb-4">
+                  <h2 className="text-2xl font-bold game-title text-amber-400">
+                    🏔️ Spire Mode - Floor {store.currentFloor}
+                  </h2>
+                  <div className="flex gap-2 items-center">
+                    {store.currentAction === 'climb' && !store.isDescending && (
+                      <Badge className="bg-green-900/50 text-green-300 border-green-600">Climbing</Badge>
+                    )}
+                    <Button
+                      variant="outline"
+                      className="border-blue-600/50 text-blue-400 hover:bg-blue-900/20"
+                      onClick={() => store.climbDownFloor()}
+                      disabled={store.isDescending}
+                    >
+                      <ChevronDown className="w-4 h-4 mr-2" />
+                      {store.isDescending ? 'Descending…' : 'Begin Descent'}
+                    </Button>
+                    <Button
+                      variant="default"
+                      className="bg-green-600 hover:bg-green-700"
+                      onClick={() => store.exitSpireMode()}
+                    >
+                      Exit Spire
+                    </Button>
+                  </div>
+                </div>
+
+                <Suspense fallback={<TabLoadingFallback />}>
+                  <SpireTab store={store} simpleMode={true} />
+                </Suspense>
+
+                <Card className="bg-gray-900/80 border-gray-700">
+                  <CardHeader className="pb-2">
+                    <CardTitle className="text-amber-400 game-panel-title text-xs">Activity Log</CardTitle>
+                  </CardHeader>
+                  <CardContent>
+                    <ScrollArea className="h-48">
+                      <div className="space-y-1">
+                        {(store.activityLog || []).slice(0, 50).map((entry: ActivityLogEntry, i) => {
+                          const getEventStyle = (eventType: string) => {
+                            switch (eventType) {
+                              case 'enemy_defeated':
+                              case 'floor_cleared':
+                                return 'text-green-400';
+                              case 'damage_dealt':
+                                return 'text-red-400';
+                              case 'dodge':
+                                return 'text-yellow-400';
+                              case 'armor_proc':
+                                return 'text-blue-400';
+                              case 'special_effect':
+                                return 'text-purple-400';
+                              case 'floor_transition':
+                                return 'text-cyan-400';
+                              case 'spell_cast':
+                                return 'text-amber-400';
+                              case 'golem_attack':
+                                return 'text-orange-400';
+                              case 'puzzle_solved':
+                                return 'text-pink-400';
+                              default:
+                                return 'text-gray-300';
+                            }
+                          };
+
+                          return (
+                            <div
+                              key={entry.id}
+                              className={`text-xs ${i === 0 ? 'text-gray-200 font-semibold' : getEventStyle(entry.eventType)}`}
+                            >
+                              {entry.message}
+                            </div>
+                          );
+                        })}
+                        {(store.activityLog || []).length === 0 && (
+                          <div className="text-xs text-gray-500 italic">No activity yet...</div>
+                        )}
+                      </div>
+                    </ScrollArea>
+                  </CardContent>
+                </Card>
+              </DebugName>
+            </div>
           )}
         </main>
       </div>
     </TooltipProvider>
   );
-  
 }