// ─── Game Store (Coordinator) ─────────────────────────────────────────────────
// Manages: day, hour, incursionStrength, containmentWards
// Coordinates tick function across all stores

import { create } from 'zustand';
import { persist } from 'zustand/middleware';
import { TICK_MS, HOURS_PER_TICK, MAX_DAY, SPELLS_DEF, GUARDIANS, ELEMENTS, BASE_UNLOCKED_ELEMENTS, getStudySpeedMultiplier } from '../constants';
import { computeEffects, hasSpecial, SPECIAL_EFFECTS } from '../upgrade-effects';
import {
  computeMaxMana,
  computeRegen,
  getFloorElement,
  getFloorMaxHP,
  getMeditationBonus,
  getIncursionStrength,
  calcInsight,
  calcDamage,
  deductSpellCost,
} from '../utils';
import { useUIStore } from './uiStore';
import { usePrestigeStore } from './prestigeStore';
import { useManaStore } from './manaStore';
import { useSkillStore } from './skillStore';
import { useCombatStore, makeInitialSpells } from './combatStore';
import type { Memory } from '../types';

export interface GameCoordinatorState {
  day: number;
  hour: number;
  incursionStrength: number;
  containmentWards: number;
  initialized: boolean;
}

export interface GameCoordinatorStore extends GameCoordinatorState {
  tick: () => void;
  resetGame: () => void;
  togglePause: () => void;
  startNewLoop: () => void;
  gatherMana: () => void;
  initGame: () => void;
}

const initialState: GameCoordinatorState = {
  day: 1,
  hour: 0,
  incursionStrength: 0,
  containmentWards: 0,
  initialized: false,
};

// Helper function for checking spell cost affordability
function canAffordSpell(
  cost: { type: string; element?: string; amount: number },
  rawMana: number,
  elements: Record<string, { current: number; max: number; unlocked: boolean }>
): boolean {
  if (cost.type === 'raw') {
    return rawMana >= cost.amount;
  } else if (cost.element) {
    const elem = elements[cost.element];
    return elem && elem.unlocked && elem.current >= cost.amount;
  }
  return false;
}

export const useGameStore = create<GameCoordinatorStore>()(
  persist(
    (set, get) => ({
      ...initialState,

      initGame: () => {
        set({ initialized: true });
      },

      tick: () => {
        const uiState = useUIStore.getState();
        if (uiState.gameOver || uiState.paused) return;
        
        // Helper for logging
        const addLog = (msg: string) => useUIStore.getState().addLog(msg);

        // Get all store states
        const prestigeState = usePrestigeStore.getState();
        const manaState = useManaStore.getState();
        const skillState = useSkillStore.getState();
        const combatState = useCombatStore.getState();

        // Compute effects from upgrades
        const effects = computeEffects(skillState.skillUpgrades || {}, skillState.skillTiers || {});

        const maxMana = computeMaxMana(
          { skills: skillState.skills, prestigeUpgrades: prestigeState.prestigeUpgrades, skillUpgrades: skillState.skillUpgrades, skillTiers: skillState.skillTiers },
          effects
        );
        const baseRegen = computeRegen(
          { skills: skillState.skills, prestigeUpgrades: prestigeState.prestigeUpgrades, skillUpgrades: skillState.skillUpgrades, skillTiers: skillState.skillTiers },
          effects
        );

        // Time progression
        let hour = get().hour + HOURS_PER_TICK;
        let day = get().day;
        if (hour >= 24) {
          hour -= 24;
          day += 1;
        }

        // Check for loop end
        if (day > MAX_DAY) {
          const insightGained = calcInsight({
            maxFloorReached: combatState.maxFloorReached,
            totalManaGathered: manaState.totalManaGathered,
            signedPacts: prestigeState.signedPacts,
            prestigeUpgrades: prestigeState.prestigeUpgrades,
            skills: skillState.skills,
          });
          
          addLog(`⏰ The loop ends. Gained ${insightGained} Insight.`);
          useUIStore.getState().setGameOver(true, false);
          usePrestigeStore.getState().setLoopInsight(insightGained);
          set({ day, hour });
          return;
        }

        // Check for victory
        if (combatState.maxFloorReached >= 100 && prestigeState.signedPacts.includes(100)) {
          const insightGained = calcInsight({
            maxFloorReached: combatState.maxFloorReached,
            totalManaGathered: manaState.totalManaGathered,
            signedPacts: prestigeState.signedPacts,
            prestigeUpgrades: prestigeState.prestigeUpgrades,
            skills: skillState.skills,
          }) * 3;
          
          addLog(`🏆 VICTORY! The Awakened One falls! Gained ${insightGained} Insight!`);
          useUIStore.getState().setGameOver(true, true);
          usePrestigeStore.getState().setLoopInsight(insightGained);
          return;
        }

        // Incursion
        const incursionStrength = getIncursionStrength(day, hour);

        // Meditation bonus tracking and regen calculation
        let meditateTicks = manaState.meditateTicks;
        let meditationMultiplier = 1;
        
        if (combatState.currentAction === 'meditate') {
          meditateTicks++;
          meditationMultiplier = getMeditationBonus(meditateTicks, skillState.skills, effects.meditationEfficiency);
        } else {
          meditateTicks = 0;
        }

        // Calculate effective regen with incursion and meditation
        const effectiveRegen = baseRegen * (1 - incursionStrength) * meditationMultiplier;

        // Mana regeneration
        let rawMana = Math.min(manaState.rawMana + effectiveRegen * HOURS_PER_TICK, maxMana);
        let totalManaGathered = manaState.totalManaGathered;
        let elements = { ...manaState.elements };

        // Study progress - handled by skillStore
        if (combatState.currentAction === 'study' && skillState.currentStudyTarget) {
          const studySpeedMult = getStudySpeedMultiplier(skillState.skills);
          const progressGain = HOURS_PER_TICK * studySpeedMult;
          
          const result = useSkillStore.getState().updateStudyProgress(progressGain);
          
          if (result.completed && result.target) {
            if (result.target.type === 'skill') {
              const skillId = result.target.id;
              const currentLevel = skillState.skills[skillId] || 0;
              // Update skill level
              useSkillStore.getState().incrementSkillLevel(skillId);
              useSkillStore.getState().clearPaidStudySkill(skillId);
              useCombatStore.getState().setAction('meditate');
              addLog(`✅ ${skillId} Lv.${currentLevel + 1} mastered!`);
            } else if (result.target.type === 'spell') {
              const spellId = result.target.id;
              useCombatStore.getState().learnSpell(spellId);
              useSkillStore.getState().setCurrentStudyTarget(null);
              useCombatStore.getState().setAction('meditate');
              addLog(`📖 ${SPELLS_DEF[spellId]?.name || spellId} learned!`);
            }
          }
        }

        // Convert action - auto convert mana
        if (combatState.currentAction === 'convert') {
          const unlockedElements = Object.entries(elements)
            .filter(([, e]) => e.unlocked && e.current < e.max);

          if (unlockedElements.length > 0 && rawMana >= 100) {
            unlockedElements.sort((a, b) => (b[1].max - b[1].current) - (a[1].max - a[1].current));
            const [targetId, targetState] = unlockedElements[0];
            const canConvert = Math.min(
              Math.floor(rawMana / 100),
              targetState.max - targetState.current
            );
            if (canConvert > 0) {
              rawMana -= canConvert * 100;
              elements = {
                ...elements,
                [targetId]: { ...targetState, current: targetState.current + canConvert }
              };
            }
          }
        }

        // Pact ritual progress
        if (prestigeState.pactRitualFloor !== null) {
          const guardian = GUARDIANS[prestigeState.pactRitualFloor];
          if (guardian) {
            const pactAffinityBonus = 1 - (prestigeState.prestigeUpgrades.pactAffinity || 0) * 0.1;
            const requiredTime = guardian.pactTime * pactAffinityBonus;
            const newProgress = prestigeState.pactRitualProgress + HOURS_PER_TICK;

            if (newProgress >= requiredTime) {
              addLog(`📜 Pact signed with ${guardian.name}! You have gained their boons.`);
              usePrestigeStore.getState().addSignedPact(prestigeState.pactRitualFloor);
              usePrestigeStore.getState().removeDefeatedGuardian(prestigeState.pactRitualFloor);
              usePrestigeStore.getState().setPactRitualFloor(null);
            } else {
              usePrestigeStore.getState().updatePactRitualProgress(newProgress);
            }
          }
        }

        // Combat
        let { currentFloor, floorHP, floorMaxHP, maxFloorReached, castProgress } = combatState;
        const floorElement = getFloorElement(currentFloor);

        if (combatState.currentAction === 'climb') {
          const spellId = combatState.activeSpell;
          const spellDef = SPELLS_DEF[spellId];

          if (spellDef) {
            const baseAttackSpeed = 1 + (skillState.skills.quickCast || 0) * 0.05;
            const totalAttackSpeed = baseAttackSpeed * effects.attackSpeedMultiplier;
            const spellCastSpeed = spellDef.castSpeed || 1;
            const progressPerTick = HOURS_PER_TICK * spellCastSpeed * totalAttackSpeed;

            castProgress = (castProgress || 0) + progressPerTick;

            // Process complete casts
            while (castProgress >= 1 && canAffordSpell(spellDef.cost, rawMana, elements)) {
              const afterCost = deductSpellCost(spellDef.cost, rawMana, elements);
              rawMana = afterCost.rawMana;
              elements = afterCost.elements;
              totalManaGathered += spellDef.cost.amount;

              // Calculate damage
              let dmg = calcDamage(
                { skills: skillState.skills, signedPacts: prestigeState.signedPacts },
                spellId,
                floorElement
              );

              // Apply upgrade damage multipliers and bonuses
              dmg = dmg * effects.baseDamageMultiplier + effects.baseDamageBonus;

              // Executioner: +100% damage to enemies below 25% HP
              if (hasSpecial(effects, SPECIAL_EFFECTS.EXECUTIONER) && floorHP / floorMaxHP < 0.25) {
                dmg *= 2;
              }

              // Berserker: +50% damage when below 50% mana
              if (hasSpecial(effects, SPECIAL_EFFECTS.BERSERKER) && rawMana < maxMana * 0.5) {
                dmg *= 1.5;
              }

              // Spell echo - chance to cast again
              const echoChance = (skillState.skills.spellEcho || 0) * 0.1;
              if (Math.random() < echoChance) {
                dmg *= 2;
                addLog(`✨ Spell Echo! Double damage!`);
              }

              // Apply damage
              floorHP = Math.max(0, floorHP - dmg);
              castProgress -= 1;

              if (floorHP <= 0) {
                // Floor cleared
                const wasGuardian = GUARDIANS[currentFloor];
                if (wasGuardian && !prestigeState.defeatedGuardians.includes(currentFloor) && !prestigeState.signedPacts.includes(currentFloor)) {
                  usePrestigeStore.getState().addDefeatedGuardian(currentFloor);
                  addLog(`⚔️ ${wasGuardian.name} defeated! Visit the Grimoire to sign a pact.`);
                } else if (!wasGuardian) {
                  if (currentFloor % 5 === 0) {
                    addLog(`🏰 Floor ${currentFloor} cleared!`);
                  }
                }

                currentFloor = currentFloor + 1;
                if (currentFloor > 100) {
                  currentFloor = 100;
                }
                floorMaxHP = getFloorMaxHP(currentFloor);
                floorHP = floorMaxHP;
                maxFloorReached = Math.max(maxFloorReached, currentFloor);
                castProgress = 0;

                useCombatStore.getState().advanceFloor();
              }
            }
          }
        }

        // Update all stores with new state
        useManaStore.setState({
          rawMana,
          meditateTicks,
          totalManaGathered,
          elements,
        });

        useCombatStore.setState({
          floorHP,
          floorMaxHP,
          maxFloorReached,
          castProgress,
        });

        set({
          day,
          hour,
          incursionStrength,
        });
      },

      gatherMana: () => {
        const skillState = useSkillStore.getState();
        const manaState = useManaStore.getState();
        const prestigeState = usePrestigeStore.getState();

        // Compute click mana
        let cm = 1 + 
          (skillState.skills.manaTap || 0) * 1 + 
          (skillState.skills.manaSurge || 0) * 3;

        // Mana overflow bonus
        const overflowBonus = 1 + (skillState.skills.manaOverflow || 0) * 0.25;
        cm = Math.floor(cm * overflowBonus);

        const effects = computeEffects(skillState.skillUpgrades || {}, skillState.skillTiers || {});
        const max = computeMaxMana(
          { skills: skillState.skills, prestigeUpgrades: prestigeState.prestigeUpgrades, skillUpgrades: skillState.skillUpgrades, skillTiers: skillState.skillTiers },
          effects
        );

        useManaStore.setState({
          rawMana: Math.min(manaState.rawMana + cm, max),
          totalManaGathered: manaState.totalManaGathered + cm,
        });
      },

      resetGame: () => {
        // Clear all persisted state
        localStorage.removeItem('mana-loop-ui-storage');
        localStorage.removeItem('mana-loop-prestige-storage');
        localStorage.removeItem('mana-loop-mana-storage');
        localStorage.removeItem('mana-loop-skill-storage');
        localStorage.removeItem('mana-loop-combat-storage');
        localStorage.removeItem('mana-loop-game-storage');

        const startFloor = 1;
        const elemMax = 10;

        const elements: Record<string, { current: number; max: number; unlocked: boolean }> = {};
        Object.keys(ELEMENTS).forEach((k) => {
          elements[k] = {
            current: 0,
            max: elemMax,
            unlocked: BASE_UNLOCKED_ELEMENTS.includes(k),
          };
        });

        useUIStore.getState().resetUI();
        usePrestigeStore.getState().resetPrestige();
        useManaStore.getState().resetMana({}, {}, {}, {});
        useSkillStore.getState().resetSkills();
        useCombatStore.getState().resetCombat(startFloor);

        set({
          ...initialState,
          initialized: true,
        });
      },

      togglePause: () => {
        useUIStore.getState().togglePause();
      },

      startNewLoop: () => {
        const prestigeState = usePrestigeStore.getState();
        const combatState = useCombatStore.getState();
        const manaState = useManaStore.getState();
        const skillState = useSkillStore.getState();

        const insightGained = prestigeState.loopInsight || calcInsight({
          maxFloorReached: combatState.maxFloorReached,
          totalManaGathered: manaState.totalManaGathered,
          signedPacts: prestigeState.signedPacts,
          prestigeUpgrades: prestigeState.prestigeUpgrades,
          skills: skillState.skills,
        });

        const total = prestigeState.insight + insightGained;

        // Spell preservation is only through prestige upgrade "spellMemory" (purchased with insight)
        // Not through a skill - that would undermine the insight economy

        const pu = prestigeState.prestigeUpgrades;
        const startFloor = 1 + (pu.spireKey || 0) * 2;

        // Apply saved memories - restore skill levels, tiers, and upgrades
        const memories = prestigeState.memories || [];
        const newSkills: Record<string, number> = {};
        const newSkillTiers: Record<string, number> = {};
        const newSkillUpgrades: Record<string, string[]> = {};

        if (memories.length > 0) {
          for (const memory of memories) {
            const tieredSkillId = memory.tier > 1 ? `${memory.skillId}_t${memory.tier}` : memory.skillId;
            newSkills[tieredSkillId] = memory.level;

            if (memory.tier > 1) {
              newSkillTiers[memory.skillId] = memory.tier;
            }

            newSkillUpgrades[tieredSkillId] = memory.upgrades || [];
          }
        }

        // Reset and update all stores for new loop
        useUIStore.setState({
          gameOver: false,
          victory: false,
          paused: false,
          logs: ['✨ The loop begins. You start with Mana Bolt. Gather your strength, mage.'],
        });

        usePrestigeStore.getState().resetPrestigeForNewLoop(
          total,
          pu,
          prestigeState.memories,
          3 + (pu.deepMemory || 0)
        );
        usePrestigeStore.getState().incrementLoopCount();

        useManaStore.getState().resetMana(pu, newSkills, newSkillUpgrades, newSkillTiers);

        useSkillStore.getState().resetSkills(newSkills, newSkillUpgrades, newSkillTiers);

        // Reset combat with starting floor and any spells from prestige upgrades
        const startSpells = makeInitialSpells();
        if (pu.spellMemory) {
          const availableSpells = Object.keys(SPELLS_DEF).filter(s => s !== 'manaBolt');
          const shuffled = availableSpells.sort(() => Math.random() - 0.5);
          for (let i = 0; i < Math.min(pu.spellMemory, shuffled.length); i++) {
            startSpells[shuffled[i]] = { learned: true, level: 1, studyProgress: 0 };
          }
        }

        useCombatStore.setState({
          currentFloor: startFloor,
          floorHP: getFloorMaxHP(startFloor),
          floorMaxHP: getFloorMaxHP(startFloor),
          maxFloorReached: startFloor,
          activeSpell: 'manaBolt',
          currentAction: 'meditate',
          castProgress: 0,
          spells: startSpells,
        });

        set({
          day: 1,
          hour: 0,
          incursionStrength: 0,
          containmentWards: 0,
        });
      },
    }),
    {
      name: 'mana-loop-game-storage',
      partialize: (state) => ({
        day: state.day,
        hour: state.hour,
        incursionStrength: state.incursionStrength,
        containmentWards: state.containmentWards,
      }),
    }
  )
);

// Re-export the game loop hook for convenience
export function useGameLoop() {
  const tick = useGameStore((s) => s.tick);

  return {
    start: () => {
      const interval = setInterval(tick, TICK_MS);
      return () => clearInterval(interval);
    },
  };
}