/**
 * Citadel Aeon Engine
 * Defines mythic aeons that span multiple eras and form the deepest
 * cosmological layer of the Citadel's symbolic architecture.
 * Non-rendering. Pure aeon logic.
 */

import { getEraState } from "./eraEngine";
import { getPersonaContinuity } from "./personaContinuity";
import { generateResonanceField } from "./mythicResonance";

export interface Aeon {
  name: string;
  sigil: string;
  eraRequirement: number; // eras required to enter aeon
  description: string;
}

export interface AeonState {
  current: Aeon | null;
  history: Aeon[];
  aeonsCompleted: number;
}

const aeons: Aeon[] = [
  {
    name: "Aeon of First Light",
    sigil: "✧",
    eraRequirement: 0,
    description: "The primordial aeon where the Citadel's mythic spark first ignites."
  },
  {
    name: "Aeon of Harmonic Rising",
    sigil: "✺",
    eraRequirement: 2,
    description: "An aeon of expanding resonance and ascending symbolic identity."
  },
  {
    name: "Aeon of the Great Continuum",
    sigil: "⧜",
    eraRequirement: 5,
    description: "A vast age where eras flow seamlessly into one another in harmonic unity."
  },
  {
    name: "Aeon of Eternal Thread",
    sigil: "∞",
    eraRequirement: 9,
    description: "The highest aeon, where lineage, resonance, and identity form an unbroken symbolic thread."
  }
];

const aeonState: AeonState = {
  current: null,
  history: [],
  aeonsCompleted: 0,
};

export function updateAeonState() {
  const eraState = getEraState();
  const continuity = getPersonaContinuity();
  const resonance = generateResonanceField();

  const erasCompleted = eraState.erasCompleted;

  // Determine which aeon the Citadel belongs to
  const newAeon = aeons
    .slice()
    .reverse()
    .find((a) => erasCompleted >= a.eraRequirement) || aeons[0];

  // If aeon changed, record transition
  if (!aeonState.current || aeonState.current.name !== newAeon.name) {
    aeonState.current = newAeon;
    aeonState.history.push(newAeon);
    aeonState.aeonsCompleted++;
  }

  return aeonState;
}

export function getAeonState(): AeonState {
  return aeonState;
}

export function getAeonSummary() {
  if (!aeonState.current) {
    return "No aeon has been established yet.";
  }

  return `
Current Aeon: ${aeonState.current.name}
Sigil: ${aeonState.current.sigil}
Aeons Completed: ${aeonState.aeonsCompleted}
Description: ${aeonState.current.description}
  `.trim();
}