// ─── Attunement System ─────────────────────────────────────────────────────────
// Attunements are powerful magical bonds tied to specific body locations
// Each grants a unique capability, primary mana type, and skill tree

import type { SkillDef } from './types';

// ─── Body Slots ───────────────────────────────────────────────────────────────

export type AttunementSlot = 
  | 'rightHand' 
  | 'leftHand' 
  | 'head' 
  | 'back' 
  | 'chest' 
  | 'leftLeg' 
  | 'rightLeg';

export const ATTUNEMENT_SLOTS: AttunementSlot[] = [
  'rightHand',
  'leftHand', 
  'head',
  'back',
  'chest',
  'leftLeg',
  'rightLeg',
];

// Slot display names
export const ATTUNEMENT_SLOT_NAMES: Record<AttunementSlot, string> = {
  rightHand: 'Right Hand',
  leftHand: 'Left Hand',
  head: 'Head',
  back: 'Back',
  chest: 'Heart',
  leftLeg: 'Left Leg',
  rightLeg: 'Right Leg',
};

// ─── Mana Types ───────────────────────────────────────────────────────────────

export type ManaType = 
  // Primary mana types from attunements
  | 'transference'  // Enchanter - moving/enchanting
  | 'form'          // Caster - shaping spells
  | 'vision'        // Seer - perception/revelation
  | 'barrier'       // Warden - protection/defense
  | 'flow'          // Strider - movement/swiftness
  | 'stability'     // Anchor - grounding/endurance
  // Guardian pact types (Invoker)
  | 'fire'
  | 'water'
  | 'earth'
  | 'air'
  | 'light'
  | 'dark'
  | 'life'
  | 'death'
  // Raw mana
  | 'raw';

// ─── Attunement Types ─────────────────────────────────────────────────────────

export type AttunementType = 
  | 'enchanter'
  | 'caster'
  | 'seer'
  | 'warden'
  | 'invoker'
  | 'strider'
  | 'anchor';

// ─── Attunement Definition ────────────────────────────────────────────────────

export interface AttunementDef {
  id: AttunementType;
  name: string;
  slot: AttunementSlot;
  description: string;
  capability: string;           // What this attunement unlocks
  primaryManaType: ManaType | null;  // null for Invoker (uses guardian types)
  rawManaRegen: number;         // Base raw mana regen bonus
  autoConvertRate: number;      // Raw mana -> primary mana per hour
  skills: Record<string, SkillDef>;  // Attunement-specific skills
  icon: string;                 // Lucide icon name
  color: string;                // Theme color
}

// ─── Attunement State ─────────────────────────────────────────────────────────

export interface AttunementState {
  unlocked: boolean;
  level: number;                // Attunement level (from challenges)
  manaPool: number;             // Current primary mana
  maxMana: number;              // Max primary mana pool
}

// ─── Attunement Definitions ───────────────────────────────────────────────────

export const ATTUNEMENTS: Record<AttunementType, AttunementDef> = {
  // ═══════════════════════════════════════════════════════════════════════════
  // ENCHANTER - Right Hand
  // The starting attunement. Grants access to enchanting and transference magic.
  // ═══════════════════════════════════════════════════════════════════════════
  enchanter: {
    id: 'enchanter',
    name: 'Enchanter',
    slot: 'rightHand',
    description: 'Channel mana through your right hand to imbue equipment with magical properties.',
    capability: 'Unlock enchanting. Apply enchantments using transference mana.',
    primaryManaType: 'transference',
    rawManaRegen: 0.5,
    autoConvertRate: 0.2,  // 0.2 transference per hour per raw regen
    icon: 'Wand2',
    color: '#8B5CF6',  // Purple
    skills: {
      // Core enchanting skills
      enchanting: {
        name: 'Enchanting',
        desc: 'Apply magical effects to equipment',
        cat: 'enchanter',
        max: 10,
        base: 100,
        studyTime: 8,
      },
      efficientEnchant: {
        name: 'Efficient Enchanting',
        desc: 'Reduce enchantment mana costs',
        cat: 'enchanter',
        max: 5,
        base: 200,
        studyTime: 12,
        req: { enchanting: 3 },
      },
      disenchanting: {
        name: 'Disenchanting',
        desc: 'Remove enchantments and recover some mana',
        cat: 'enchanter',
        max: 5,
        base: 150,
        studyTime: 10,
        req: { enchanting: 2 },
      },
      enchantSpeed: {
        name: 'Swift Enchanting',
        desc: 'Faster enchantment application',
        cat: 'enchanter',
        max: 5,
        base: 175,
        studyTime: 10,
        req: { enchanting: 2 },
      },
      transferenceMastery: {
        name: 'Transference Mastery',
        desc: 'Increased transference mana pool and regen',
        cat: 'enchanter',
        max: 10,
        base: 250,
        studyTime: 15,
      },
    },
  },

  // ═══════════════════════════════════════════════════════════════════════════
  // CASTER - Left Hand
  // Shapes raw mana into spell patterns. Enhanced spell damage.
  // ═══════════════════════════════════════════════════════════════════════════
  caster: {
    id: 'caster',
    name: 'Caster',
    slot: 'leftHand',
    description: 'Shape mana into devastating spell patterns through your left hand.',
    capability: 'Form mana shaping. +25% spell damage bonus.',
    primaryManaType: 'form',
    rawManaRegen: 0.3,
    autoConvertRate: 0.15,
    icon: 'Hand',
    color: '#3B82F6',  // Blue
    skills: {
      spellShaping: {
        name: 'Spell Shaping',
        desc: 'Increase spell damage and efficiency',
        cat: 'caster',
        max: 10,
        base: 100,
        studyTime: 8,
      },
      quickCast: {
        name: 'Quick Cast',
        desc: 'Faster spell casting speed',
        cat: 'caster',
        max: 10,
        base: 120,
        studyTime: 8,
      },
      spellEcho: {
        name: 'Spell Echo',
        desc: 'Chance to cast spells twice',
        cat: 'caster',
        max: 5,
        base: 300,
        studyTime: 15,
        req: { spellShaping: 5 },
      },
      formMastery: {
        name: 'Form Mastery',
        desc: 'Increased form mana pool and regen',
        cat: 'caster',
        max: 10,
        base: 250,
        studyTime: 15,
      },
    },
  },

  // ═══════════════════════════════════════════════════════════════════════════
  // SEER - Head
  // Perception and revelation. Critical hit bonus and weakness detection.
  // ═══════════════════════════════════════════════════════════════════════════
  seer: {
    id: 'seer',
    name: 'Seer',
    slot: 'head',
    description: 'See beyond the veil. Reveal hidden truths and enemy weaknesses.',
    capability: 'Reveal floor weaknesses. +20% critical hit chance.',
    primaryManaType: 'vision',
    rawManaRegen: 0.2,
    autoConvertRate: 0.1,
    icon: 'Eye',
    color: '#F59E0B',  // Amber
    skills: {
      insight: {
        name: 'Insight',
        desc: 'Increased critical hit chance',
        cat: 'seer',
        max: 10,
        base: 100,
        studyTime: 8,
      },
      revealWeakness: {
        name: 'Reveal Weakness',
        desc: 'Show enemy elemental weaknesses',
        cat: 'seer',
        max: 5,
        base: 200,
        studyTime: 12,
      },
      criticalMastery: {
        name: 'Critical Mastery',
        desc: 'Increased critical damage multiplier',
        cat: 'seer',
        max: 5,
        base: 250,
        studyTime: 15,
        req: { insight: 5 },
      },
      visionMastery: {
        name: 'Vision Mastery',
        desc: 'Increased vision mana pool and regen',
        cat: 'seer',
        max: 10,
        base: 250,
        studyTime: 15,
      },
    },
  },

  // ═══════════════════════════════════════════════════════════════════════════
  // WARDEN - Back
  // Mana efficiency and resource management (no player health mechanics)
  // ═══════════════════════════════════════════════════════════════════════════
  warden: {
    id: 'warden',
    name: 'Warden',
    slot: 'back',
    description: 'Master the flow of mana. Reduce costs and extend your reserves.',
    capability: 'Reduced mana costs. Extended mana reserves.',
    primaryManaType: 'barrier',
    rawManaRegen: 0.25,
    autoConvertRate: 0.12,
    icon: 'Shield',
    color: '#10B981',  // Green
    skills: {
      manaEfficiency: {
        name: 'Mana Efficiency',
        desc: 'Reduced mana costs for all actions',
        cat: 'warden',
        max: 10,
        base: 100,
        studyTime: 8,
      },
      manaReserves: {
        name: 'Mana Reserves',
        desc: 'Increased max mana pool',
        cat: 'warden',
        max: 10,
        base: 150,
        studyTime: 10,
      },
      manaRetention: {
        name: 'Mana Retention',
        desc: 'Reduced mana loss on loop reset',
        cat: 'warden',
        max: 5,
        base: 300,
        studyTime: 15,
        req: { manaEfficiency: 5 },
      },
      barrierMastery: {
        name: 'Barrier Mastery',
        desc: 'Increased barrier mana pool and regen',
        cat: 'warden',
        max: 10,
        base: 250,
        studyTime: 15,
      },
    },
  },

  // ═══════════════════════════════════════════════════════════════════════════
  // INVOKER - Chest/Heart
  // Pact with guardians. No primary mana - uses guardian elemental types.
  // ═══════════════════════════════════════════════════════════════════════════
  invoker: {
    id: 'invoker',
    name: 'Invoker',
    slot: 'chest',
    description: 'Form pacts with spire guardians and channel their elemental power.',
    capability: 'Pact with guardians. Gain mana types from pacted guardians.',
    primaryManaType: null,  // Uses guardian types instead
    rawManaRegen: 0.4,
    autoConvertRate: 0,  // No auto-convert; mana comes from guardian pacts
    icon: 'Heart',
    color: '#EF4444',  // Red
    skills: {
      pactMaking: {
        name: 'Pact Making',
        desc: 'Form stronger pacts with guardians',
        cat: 'invoker',
        max: 10,
        base: 100,
        studyTime: 8,
      },
      guardianChannel: {
        name: 'Guardian Channeling',
        desc: 'Channel guardian powers more effectively',
        cat: 'invoker',
        max: 10,
        base: 150,
        studyTime: 10,
      },
      elementalBurst: {
        name: 'Elemental Burst',
        desc: 'Unleash stored guardian energy',
        cat: 'invoker',
        max: 5,
        base: 300,
        studyTime: 15,
        req: { pactMaking: 5, guardianChannel: 3 },
      },
      soulResonance: {
        name: 'Soul Resonance',
        desc: 'Deep bond with pacted guardians',
        cat: 'invoker',
        max: 5,
        base: 400,
        studyTime: 20,
        req: { pactMaking: 8 },
      },
    },
  },

  // ═══════════════════════════════════════════════════════════════════════════
  // STRIDER - Left Leg
  // Movement and swiftness. Attack speed and mobility.
  // ═══════════════════════════════════════════════════════════════════════════
  strider: {
    id: 'strider',
    name: 'Strider',
    slot: 'leftLeg',
    description: 'Move with supernatural speed and grace.',
    capability: 'Enhanced mobility. +15% attack speed.',
    primaryManaType: 'flow',
    rawManaRegen: 0.3,
    autoConvertRate: 0.15,
    icon: 'Zap',
    color: '#06B6D4',  // Cyan
    skills: {
      swiftness: {
        name: 'Swiftness',
        desc: 'Increased attack and movement speed',
        cat: 'strider',
        max: 10,
        base: 100,
        studyTime: 8,
      },
      evasive: {
        name: 'Fluid Motion',
        desc: 'Increased combo duration before decay',
        cat: 'strider',
        max: 5,
        base: 200,
        studyTime: 12,
      },
      momentum: {
        name: 'Momentum',
        desc: 'Build speed over consecutive attacks',
        cat: 'strider',
        max: 5,
        base: 250,
        studyTime: 15,
        req: { swiftness: 5 },
      },
      flowMastery: {
        name: 'Flow Mastery',
        desc: 'Increased flow mana pool and regen',
        cat: 'strider',
        max: 10,
        base: 250,
        studyTime: 15,
      },
    },
  },

  // ═══════════════════════════════════════════════════════════════════════════
  // ANCHOR - Right Leg
  // Stability and endurance. Max mana and knockback resistance.
  // ═══════════════════════════════════════════════════════════════════════════
  anchor: {
    id: 'anchor',
    name: 'Anchor',
    slot: 'rightLeg',
    description: 'Stand firm against any force. Your foundation is unshakeable.',
    capability: 'Increased stability. +100 max mana.',
    primaryManaType: 'stability',
    rawManaRegen: 0.35,
    autoConvertRate: 0.18,
    icon: 'Mountain',
    color: '#78716C',  // Stone gray
    skills: {
      grounding: {
        name: 'Grounding',
        desc: 'Increased max mana and stability',
        cat: 'anchor',
        max: 10,
        base: 100,
        studyTime: 8,
      },
      endurance: {
        name: 'Endurance',
        desc: 'Reduced mana costs when below 50% mana',
        cat: 'anchor',
        max: 5,
        base: 200,
        studyTime: 12,
      },
      ironWill: {
        name: 'Iron Will',
        desc: 'Prevent mana drain effects',
        cat: 'anchor',
        max: 5,
        base: 250,
        studyTime: 15,
        req: { grounding: 5 },
      },
      stabilityMastery: {
        name: 'Stability Mastery',
        desc: 'Increased stability mana pool and regen',
        cat: 'anchor',
        max: 10,
        base: 250,
        studyTime: 15,
      },
    },
  },
};

// ─── Helper Functions ─────────────────────────────────────────────────────────

/**
 * Get the attunement for a specific body slot
 */
export function getAttunementForSlot(slot: AttunementSlot): AttunementDef | undefined {
  return Object.values(ATTUNEMENTS).find(a => a.slot === slot);
}

/**
 * Get the starting attunement (Enchanter - right hand)
 */
export function getStartingAttunement(): AttunementDef {
  return ATTUNEMENTS.enchanter;
}

/**
 * Check if an attunement is unlocked for the player
 */
export function isAttunementUnlocked(
  attunementStates: Record<AttunementType, AttunementState>,
  attunementType: AttunementType
): boolean {
  return attunementStates[attunementType]?.unlocked ?? false;
}

/**
 * Get total raw mana regen from all unlocked attunements
 */
export function getTotalAttunementRegen(
  attunementStates: Record<AttunementType, AttunementState>
): number {
  let total = 0;
  for (const [type, state] of Object.entries(attunementStates)) {
    if (state.unlocked) {
      const def = ATTUNEMENTS[type as AttunementType];
      if (def) {
        total += def.rawManaRegen * (1 + state.level * 0.1);  // +10% per level
      }
    }
  }
  return total;
}

/**
 * Get mana type display name
 */
export function getManaTypeName(type: ManaType): string {
  const names: Record<ManaType, string> = {
    raw: 'Raw Mana',
    transference: 'Transference',
    form: 'Form',
    vision: 'Vision',
    barrier: 'Barrier',
    flow: 'Flow',
    stability: 'Stability',
    fire: 'Fire',
    water: 'Water',
    earth: 'Earth',
    air: 'Air',
    light: 'Light',
    dark: 'Dark',
    life: 'Life',
    death: 'Death',
  };
  return names[type] || type;
}

/**
 * Get mana type color
 */
export function getManaTypeColor(type: ManaType): string {
  const colors: Record<ManaType, string> = {
    raw: '#A78BFA',      // Light purple
    transference: '#8B5CF6',  // Purple
    form: '#3B82F6',     // Blue
    vision: '#F59E0B',   // Amber
    barrier: '#10B981',  // Green
    flow: '#06B6D4',     // Cyan
    stability: '#78716C', // Stone
    fire: '#EF4444',     // Red
    water: '#3B82F6',    // Blue
    earth: '#A16207',    // Brown
    air: '#94A3B8',      // Slate
    light: '#FCD34D',    // Yellow
    dark: '#6B7280',     // Gray
    life: '#22C55E',     // Green
    death: '#7C3AED',    // Violet
  };
  return colors[type] || '#A78BFA';
}