// ─── Computed Stats Functions ─────────────────────────────────────────
// Extracted from store.ts (lines 362-689)
// Full implementations with UnifiedEffects support

import type { GameState, SpellCost, StudyTarget } from '../types';
import type { ComputedEffects } from '../upgrade-effects.types';
import type { UnifiedEffects } from '../effects';
import { SPELLS_DEF, GUARDIANS, ELEMENT_OPPOSITES, SKILLS_DEF, HOURS_PER_TICK, TICK_MS, INCURSION_START_DAY, MAX_DAY, ELEMENTS } from '../constants';
import { getUnifiedEffects } from '../effects';
import { getTotalAttunementRegen, getTotalAttunementConversionDrain } from '../data/attunements';
import { hasSpecial, SPECIAL_EFFECTS } from '../special-effects';

// Helper to get effective skill level accounting for tiers
function getEffectiveSkillLevel(
  skills: Record<string, number>,
  baseSkillId: string,
  skillTiers: Record<string, number> = {}
): { level: number; tier: number; tierMultiplier: number } {
  const currentTier = skillTiers[baseSkillId] || 1;
  const tieredSkillId = currentTier > 1 ? `${baseSkillId}_t${currentTier}` : baseSkillId;
  const level = skills[tieredSkillId] || skills[baseSkillId] || 0;
  const tierMultiplier = Math.pow(10, currentTier - 1);
  return { level, tier: currentTier, tierMultiplier };
}

export function computeMaxMana(
  state: GameState,
  effects?: ComputedEffects | UnifiedEffects
): number {
  const pu = state.prestigeUpgrades;
  const skillMult = (effects as any)?.skillLevelMultiplier || 1;
  const base = 100 + (state.skills.manaWell || 0) * 100 * skillMult + (pu.manaWell || 0) * 500;
  
  // Check if we need to compute effects from equipment
  if (!effects && state.equipmentInstances && state.equippedInstances) {
    effects = getUnifiedEffects(state as any);
  }
  
  let maxMana: number;
  if (effects) {
    maxMana = Math.floor((base + effects.maxManaBonus) * effects.maxManaMultiplier);
  } else {
    maxMana = base;
  }
  
  if (effects && hasSpecial(effects, SPECIAL_EFFECTS.MANA_CONDENSE)) {
    const totalGathered = state.totalManaGathered || 0;
    const condensesBonus = Math.floor(totalGathered / 1000);
    maxMana = Math.floor(maxMana * (1 + condensesBonus * 0.01));
  }
  
  return maxMana;
}

export function computeElementMax(
  state: GameState,
  effects?: ComputedEffects | UnifiedEffects,
  element?: string
): number {
  const pu = state.prestigeUpgrades;
  const base = 10 + (state.skills.elemAttune || 0) * 50 + (pu.elementalAttune || 0) * 25;
  
  let adjustedBase = base;
  if (element && state.unlockedManaTypeUpgrades) {
    const typeUpgrades = state.unlockedManaTypeUpgrades.filter(u => u.typeId === element);
    const totalLevels = typeUpgrades.reduce((sum, u) => sum + u.level, 0);
    adjustedBase = base + (totalLevels * 10);
  }
  
  if (effects) {
    let bonus = effects.elementCapBonus || 0;
    if (element && (effects as UnifiedEffects).perElementCapBonus) {
      const perElementBonus = (effects as UnifiedEffects).perElementCapBonus[element];
      if (perElementBonus) {
        bonus += perElementBonus;
      }
    }
    return Math.floor((adjustedBase + bonus) * (effects.elementCapMultiplier || 1));
  }
  return adjustedBase;
}

export function computeRegen(
  state: GameState,
  effects?: ComputedEffects | UnifiedEffects
): number {
  const pu = state.prestigeUpgrades;
  const temporalBonus = 1 + (pu.temporalEcho || 0) * 0.1;
  const skillMult = (effects as any)?.skillLevelMultiplier || 1;
  const base = 2 + (state.skills.manaFlow || 0) * 1 * skillMult + (state.skills.manaSpring || 0) * 2 * skillMult + (pu.manaFlow || 0) * 0.5;
  
  let regen = base * temporalBonus;
  const attunementRegen = getTotalAttunementRegen(state.attunements || {});
  regen += attunementRegen;
  
  if (!effects && state.equipmentInstances && state.equippedInstances) {
    effects = getUnifiedEffects(state as any);
  }
  
  if (effects) {
    regen = (regen + effects.regenBonus + effects.permanentRegenBonus) * effects.regenMultiplier;
  }
  return regen;
}

export function computeEffectiveRegenForDisplay(
  state: GameState,
  effects?: ComputedEffects | UnifiedEffects
): { rawRegen: number; conversionDrain: number; effectiveRegen: number } {
  const rawRegen = computeRegen(state, effects);
  const conversionDrain = getTotalAttunementConversionDrain(state.attunements || {});
  const effectiveRegen = Math.max(0, rawRegen - conversionDrain);
  return { rawRegen, conversionDrain, effectiveRegen };
}

export function computeEffectiveRegen(
  state: GameState,
  effects?: ComputedEffects
): number {
  let regen = computeRegen(state, effects);
  const incursionStrength = state.incursionStrength || 0;
  regen *= (1 - incursionStrength);
  return regen;
}

export function computeClickMana(
  state: GameState,
  effects?: ComputedEffects | UnifiedEffects
): number {
  const skillMult = (effects as any)?.skillLevelMultiplier || 1;
  const base = 1 + (state.skills.manaTap || 0) * 1 * skillMult + (state.skills.manaSurge || 0) * 3 * skillMult;
  
  if (!effects && state.equipmentInstances && state.equippedInstances) {
    effects = getUnifiedEffects(state as any);
  }
  
  if (effects) {
    return Math.floor((base + effects.clickManaBonus) * effects.clickManaMultiplier);
  }
  return base;
}

function getElementalBonus(spellElem: string, floorElem: string): number {
  if (spellElem === 'raw') return 1.0;
  if (spellElem === floorElem) return 1.25;
  if (ELEMENT_OPPOSITES[floorElem] === spellElem) return 1.5;
  if (ELEMENT_OPPOSITES[spellElem] === floorElem) return 0.75;
  return 1.0;
}

export function calcDamage(
  state: Pick<GameState, 'skills' | 'signedPacts'>,
  spellId: string,
  floorElem?: string,
  effects?: ComputedEffects | UnifiedEffects
): number {
  const sp = SPELLS_DEF[spellId];
  if (!sp) return 5;
  const skills = state.skills;
  const skillMult = (effects as any)?.skillLevelMultiplier || 1;
  const baseDmg = sp.dmg + (skills.combatTrain || 0) * 5 * skillMult;
  const pct = 1 + (skills.arcaneFury || 0) * 0.1 * skillMult;
  const elemMasteryBonus = 1 + (skills.elementalMastery || 0) * 0.15 * skillMult;
  const critChance = (skills.precision || 0) * 0.05;
  const pactMult = state.signedPacts.reduce((m, f) => m * ((GUARDIANS as any)[f]?.pact || 1), 1);
  
  let damage = baseDmg * pct * pactMult * elemMasteryBonus;
  if (floorElem) {
    damage *= getElementalBonus(sp.elem, floorElem);
  }
  if (Math.random() < critChance) {
    damage *= 1.5;
  }
  return damage;
}

export function calcInsight(state: Pick<GameState, 'maxFloorReached' | 'totalManaGathered' | 'signedPacts' | 'prestigeUpgrades' | 'skills'>): number {
  const pu = state.prestigeUpgrades;
  const skillBonus = 1 + (state.skills.insightHarvest || 0) * 0.1;
  const mult = (1 + (pu.insightAmp || 0) * 0.25) * skillBonus;
  return Math.floor((state.maxFloorReached * 15 + state.totalManaGathered / 500 + state.signedPacts.length * 150) * mult);
}

export function getMeditationBonus(meditateTicks: number, skills: Record<string, number>, meditationEfficiency: number = 1): number {
  const hasMeditation = skills.meditation === 1;
  const hasDeepTrance = skills.deepTrance === 1;
  const hasVoidMeditation = skills.voidMeditation === 1;
  const hours = meditateTicks * HOURS_PER_TICK;
  let bonus = 1 + Math.min(hours / 4, 0.5);
  if (hasMeditation && hours >= 4) bonus = 2.5;
  if (hasDeepTrance && hours >= 6) bonus = 3.0;
  if (hasVoidMeditation && hours >= 8) bonus = 5.0;
  bonus *= meditationEfficiency;
  return bonus;
}

export function getIncursionStrength(day: number, hour: number): number {
  if (day < INCURSION_START_DAY) return 0;
  const totalHours = (day - INCURSION_START_DAY) * 24 + hour;
  const maxHours = (MAX_DAY - INCURSION_START_DAY) * 24;
  return Math.min(0.95, (totalHours / maxHours) * 0.95);
}

export function canAffordSpellCost(
  cost: SpellCost,
  rawMana: number,
  elements: Record<string, { current: number; max: number; unlocked: boolean }>
): boolean {
  if (cost.type === 'raw') {
    return rawMana >= cost.amount;
  } else {
    const elem = elements[cost.element || ''];
    return elem && elem.unlocked && elem.current >= cost.amount;
  }
}

export function deductSpellCost(
  cost: SpellCost,
  rawMana: number,
  elements: Record<string, { current: number; max: number; unlocked: boolean }>
): { rawMana: number; elements: Record<string, { current: number; max: number; unlocked: boolean }> } {
  const newElements = { ...elements };
  if (cost.type === 'raw') {
    const deductedAmount = Math.min(rawMana, cost.amount);
    return { rawMana: rawMana - deductedAmount, elements: newElements };
  } else if (cost.element && newElements[cost.element]) {
    const elem = newElements[cost.element];
    const deductedAmount = Math.min(elem.current, cost.amount);
    newElements[cost.element] = { ...elem, current: elem.current - deductedAmount };
    return { rawMana, elements: newElements };
  }
  return { rawMana, elements: newElements };
}