/**
 * Run Cycle Types — schools, run phases, meta-progression
 *
 * Defines the structure of a single run (birth → death → rebirth)
 * and the persistent meta-progression between runs.
 */

// ─── Schools ─────────────────────────────────────────────────────

export interface SchoolData {
  id: string;
  name: string;
  nameRu: string;
  description: string;
  descriptionRu: string;
  /** Starting element symbols (looked up in element registry) */
  startingElements: string[];
  /** Quantity of each starting element */
  startingQuantities: Record<string, number>;
  /** Scientific principle the school teaches */
  principle: string;
  principleRu: string;
  /** Play style description */
  playstyle: string;
  playstyleRu: string;
  /** Hex color for UI representation */
  color: string;
  /** Passive gameplay bonuses from this school's principle */
  bonuses: Record<string, number>;
  /** Condition to unlock this school (absent = always unlocked) */
  unlockCondition?: SchoolUnlockCondition;
}

/** Condition that must be met to unlock a school */
export interface SchoolUnlockCondition {
  /** What metric to check */
  type: 'elements_discovered' | 'creatures_discovered' | 'runs_completed';
  /** How many needed */
  threshold: number;
  /** Hint text (English) shown when locked */
  hint: string;
  /** Hint text (Russian) shown when locked */
  hintRu: string;
}

/** Resolved school bonuses with all multipliers filled in (defaults = 1.0) */
export interface ResolvedSchoolBonuses {
  /** Projectile damage multiplier */
  projectileDamage: number;
  /** Player movement speed multiplier */
  movementSpeed: number;
  /** Creature aggro/flee range multiplier (< 1 = less aggro) */
  creatureAggroRange: number;
  /** Reaction efficiency multiplier */
  reactionEfficiency: number;
}

/** Default bonuses (no school effect) */
export const DEFAULT_SCHOOL_BONUSES: ResolvedSchoolBonuses = {
  projectileDamage: 1.0,
  movementSpeed: 1.0,
  creatureAggroRange: 1.0,
  reactionEfficiency: 1.0,
};

// ─── Run Phases ──────────────────────────────────────────────────

/** Phases of a single run in order */
export enum RunPhase {
  Awakening = 0,
  Exploration = 1,
  Escalation = 2,
  Crisis = 3,
  Resolution = 4,
}

/** Human-readable names for RunPhase */
export const RUN_PHASE_NAMES: Record<RunPhase, string> = {
  [RunPhase.Awakening]: 'Awakening',
  [RunPhase.Exploration]: 'Exploration',
  [RunPhase.Escalation]: 'Escalation',
  [RunPhase.Crisis]: 'Crisis',
  [RunPhase.Resolution]: 'Resolution',
};

export const RUN_PHASE_NAMES_RU: Record<RunPhase, string> = {
  [RunPhase.Awakening]: 'Пробуждение',
  [RunPhase.Exploration]: 'Исследование',
  [RunPhase.Escalation]: 'Эскалация',
  [RunPhase.Crisis]: 'Кризис',
  [RunPhase.Resolution]: 'Развязка',
};

// ─── Crisis Types ────────────────────────────────────────────────

export type CrisisType = 'chemical-plague';

export interface CrisisConfig {
  type: CrisisType;
  name: string;
  nameRu: string;
  description: string;
  descriptionRu: string;
  /** Escalation threshold (0-1) at which crisis triggers */
  triggerThreshold: number;
  /** Compound that neutralizes the crisis */
  neutralizer: string;
  /** Amount needed to neutralize */
  neutralizeAmount: number;
}

// ─── Run State ───────────────────────────────────────────────────

/** State of the current run */
export interface RunState {
  /** Unique run identifier */
  runId: number;
  /** Selected school id */
  schoolId: string;
  /** Biome being explored this run */
  biomeId: string;
  /** Current phase */
  phase: RunPhase;
  /** Time spent in current phase (ms) */
  phaseTimer: number;
  /** Total run elapsed time (ms) */
  elapsed: number;
  /** Escalation level 0.0 – 1.0 */
  escalation: number;
  /** Whether crisis has been triggered */
  crisisActive: boolean;
  /** Whether crisis has been resolved */
  crisisResolved: boolean;
  /** Discoveries made this run */
  discoveries: RunDiscoveries;
  /** Whether the player is alive */
  alive: boolean;
  /** World seed for this run */
  worldSeed: number;
  /** Player death position in tile coords (set on death) */
  deathPosition: { tileX: number; tileY: number } | null;
}

export interface RunDiscoveries {
  elements: Set<string>;
  reactions: Set<string>;
  compounds: Set<string>;
  creatures: Set<string>;
}

// ─── Meta-Progression (persists between runs) ────────────────────

export interface CodexEntry {
  id: string;
  type: 'element' | 'reaction' | 'compound' | 'creature' | 'boss';
  discoveredOnRun: number;
}

export interface MetaState {
  /** Total spores earned across all runs */
  spores: number;
  /** All codex entries (permanent knowledge) */
  codex: CodexEntry[];
  /** Total runs completed */
  totalRuns: number;
  /** Total deaths */
  totalDeaths: number;
  /** Unlocked school ids */
  unlockedSchools: string[];
  /** Best run statistics */
  bestRunTime: number;
  bestRunDiscoveries: number;
  /** Run history summaries */
  runHistory: RunSummary[];
  /** Mycelium knowledge graph (persistent between runs) */
  mycelium: MyceliumGraphData;
  /** Great cycle state (7-run macro cycles) */
  greatCycle: GreatCycleState;
}

/** Serializable Mycelium graph data (stored in MetaState) */
export interface MyceliumGraphData {
  /** Knowledge nodes */
  nodes: MyceliumNodeData[];
  /** Connections between nodes */
  edges: MyceliumEdgeData[];
  /** Total deposits across all runs */
  totalDeposits: number;
  /** Total extractions across all runs */
  totalExtractions: number;
}

/** A knowledge node in the persistent Mycelium graph */
export interface MyceliumNodeData {
  /** Unique node ID (format: "type:id", e.g. "element:Na") */
  id: string;
  /** Knowledge category */
  type: 'element' | 'reaction' | 'compound' | 'creature';
  /** Reference to the specific knowledge item */
  knowledgeId: string;
  /** Run on which this was first deposited */
  depositedOnRun: number;
  /** Knowledge strength 0–1 (increases with repeated deposits) */
  strength: number;
}

/** An edge connecting two knowledge nodes in the Mycelium */
export interface MyceliumEdgeData {
  /** Source node ID */
  from: string;
  /** Target node ID */
  to: string;
  /** Connection strength 0–1 */
  weight: number;
}

export interface RunSummary {
  runId: number;
  schoolId: string;
  duration: number;
  phase: RunPhase;
  discoveries: number;
  sporesEarned: number;
  crisisResolved: boolean;
  /** Biome explored (added Phase 11) */
  biomeId?: string;
  /** Great cycle number when this run occurred */
  cycleNumber?: number;
}

// ─── Body Composition (for death animation) ──────────────────────

/** Real elemental composition of the human body (simplified) */
export const BODY_COMPOSITION: { symbol: string; fraction: number }[] = [
  { symbol: 'O', fraction: 0.65 },
  { symbol: 'C', fraction: 0.18 },
  { symbol: 'H', fraction: 0.10 },
  { symbol: 'N', fraction: 0.03 },
  { symbol: 'Ca', fraction: 0.015 },
  { symbol: 'P', fraction: 0.01 },
  { symbol: 'S', fraction: 0.003 },
  { symbol: 'Na', fraction: 0.002 },
  { symbol: 'K', fraction: 0.002 },
  { symbol: 'Fe', fraction: 0.001 },
];

// ─── Great Cycle (every 7 runs) ──────────────────────────────────

/** Narrative themes for each great cycle (GDD Section IV) */
export type CycleTheme =
  | 'awakening'   // Cycle 1 (runs 1-7): learning the world
  | 'doubt'       // Cycle 2 (runs 8-14): finding traces of past adepts
  | 'realization' // Cycle 3 (runs 15-21): understanding the nature of cycles
  | 'attempt'     // Cycle 4 (runs 22-28): first attempts to transcend
  | 'acceptance'  // Cycle 5 (runs 29-35): cycle is not a prison
  | 'synthesis';  // Cycle 6+ (runs 36+): unifying all knowledge

/** Human-readable names for CycleTheme */
export const CYCLE_THEME_NAMES: Record<CycleTheme, string> = {
  awakening: 'Awakening',
  doubt: 'Doubt',
  realization: 'Realization',
  attempt: 'Attempt',
  acceptance: 'Acceptance',
  synthesis: 'Synthesis',
};

export const CYCLE_THEME_NAMES_RU: Record<CycleTheme, string> = {
  awakening: 'Пробуждение',
  doubt: 'Сомнение',
  realization: 'Осознание',
  attempt: 'Попытка',
  acceptance: 'Принятие',
  synthesis: 'Синтез',
};

/** Ordered themes by cycle number (0-indexed, cycles beyond 6 repeat 'synthesis') */
export const CYCLE_THEMES: CycleTheme[] = [
  'awakening',
  'doubt',
  'realization',
  'attempt',
  'acceptance',
  'synthesis',
];

/** A trace left by a completed run within a great cycle */
export interface RunTrace {
  /** Run ID this trace belongs to */
  runId: number;
  /** Position within the great cycle (1-7) */
  runInCycle: number;
  /** School used this run */
  schoolId: string;
  /** Biome explored */
  biomeId: string;
  /** Death location (tile coords), null if run completed via boss victory */
  deathPosition: { tileX: number; tileY: number } | null;
  /** Phase reached when run ended */
  phaseReached: RunPhase;
  /** Was the crisis resolved? */
  crisisResolved: boolean;
  /** Number of unique discoveries */
  discoveryCount: number;
  /** Key element discoveries (up to 5 symbols for trace markers) */
  keyElements: string[];
  /** Duration of the run in ms */
  duration: number;
  /** World seed used for this run */
  worldSeed: number;
}

/** Persistent great cycle state (stored in MetaState) */
export interface GreatCycleState {
  /** Current great cycle number (1-based) */
  cycleNumber: number;
  /** Current run within the cycle (1-7, resets on renewal) */
  runInCycle: number;
  /** Current cycle's theme */
  theme: CycleTheme;
  /** Traces from runs in the CURRENT cycle (cleared on renewal) */
  currentCycleTraces: RunTrace[];
  /** Traces from the PREVIOUS cycle (for cross-cycle references) */
  previousCycleTraces: RunTrace[];
  /** Total great renewals completed */
  renewalsCompleted: number;
  /** Mycelium maturation level (increases each renewal) */
  myceliumMaturation: number;
}

/** Number of runs per great cycle */
export const RUNS_PER_CYCLE = 7;

/** World generation modifiers based on cycle number */
export interface CycleWorldModifiers {
  /** Elevation noise scale multiplier (world shape variation) */
  elevationScaleMultiplier: number;
  /** Detail noise scale multiplier */
  detailScaleMultiplier: number;
  /** Resource density multiplier */
  resourceDensityMultiplier: number;
  /** Creature spawn rate multiplier */
  creatureSpawnMultiplier: number;
  /** Escalation rate multiplier (difficulty) */
  escalationRateMultiplier: number;
}

// ─── Constants ───────────────────────────────────────────────────

/** Phase durations in ms (approximate, can be adjusted) */
export const PHASE_DURATIONS: Record<RunPhase, number> = {
  [RunPhase.Awakening]: 0,         // ends when player leaves Cradle
  [RunPhase.Exploration]: 180_000, // 3 minutes
  [RunPhase.Escalation]: 120_000,  // 2 minutes
  [RunPhase.Crisis]: 0,            // ends when resolved or player dies
  [RunPhase.Resolution]: 60_000,   // 1 minute
};

/** Escalation growth rate per second (0→1 over Escalation phase) */
export const ESCALATION_RATE = 0.005;

/** Spores awarded per discovery type */
export const SPORE_REWARDS = {
  element: 5,
  reaction: 10,
  compound: 8,
  creature: 15,
  crisisResolved: 50,
  runCompleted: 20,
};