// Domain types — the single source of truth shared by the frontend (src/), the
// backend (server/), and the LLM prompt contract. No runtime dependencies here.

/** A nation's 0–100 status indices. Every value is clamped to 0–100 by the engine. */
export interface NationStats {
  military: number;
  economy: number;
  stability: number;
  population: number;
}

export const STAT_KEYS = ['military', 'economy', 'stability', 'population'] as const;
export type StatKey = (typeof STAT_KEYS)[number];

export type NationType = 'major' | 'minor' | 'power' | 'alliance' | 'faction';

/** Direction of a bilateral diplomatic relationship. */
export type RelationStatus = 'ally' | 'neutral' | 'rival' | 'hostile' | 'war';

export const RELATION_STATUSES: RelationStatus[] = [
  'ally',
  'neutral',
  'rival',
  'hostile',
  'war',
];

/**
 * A single nation in the world. `territory` holds ISO_A3 codes; the map colors
 * each of those regions with this nation's stable color (see protocol.nationColor).
 */
export interface Nation {
  id: string;
  name: string;
  type: NationType;
  stats: NationStats;
  territory: string[];
  relations: Record<string, RelationStatus>;
}

/** Categories a narrative event can take. */
export type EventType =
  | 'military'
  | 'diplomatic'
  | 'economic'
  | 'political'
  | 'social'
  | 'disaster'
  | 'scientific'
  | 'cultural';

export const EVENT_TYPES: EventType[] = [
  'military',
  'diplomatic',
  'economic',
  'political',
  'social',
  'disaster',
  'scientific',
  'cultural',
];

export type EventOutcome = 'success' | 'failure' | 'partial' | 'neutral';

/** A narrative event the simulation emitted on some turn. */
export interface EventEntry {
  id: string;
  turn: number;
  date: string;
  nation: string; // nation id the event concerns
  type: EventType;
  title: string;
  text: string;
  outcome: EventOutcome;
}

/** The full, persisted state of one game. Saved to SQLite by id. */
export interface GameState {
  id: string;
  presetId: string;
  presetTitle: string;
  playerNationId: string;
  turn: number;
  date: string;
  nations: Record<string, Nation>;
  events: EventEntry[];
}

/**
 * A scenario the player can start. One JSON file per preset (presets/<id>.json).
 * `worldBackground` + `simulationRules` become the LLM system prompt.
 */
export interface Preset {
  id: string;
  title: string;
  startDate: string;
  summary: string;
  worldBackground: string;
  simulationRules: string[];
  nations: Nation[];
}

/** The lightweight manifest entry used to render the preset picker cards. */
export interface PresetMeta {
  id: string;
  title: string;
  startDate: string;
  summary: string;
}