import { MODES, PLATFORMS, PRESETS } from './constants';

export {
  OVERRIDE_SCHEMA_VERSION,
  SUPPORTED_OVERRIDE_SCHEMA_VERSIONS,
  THEME_SCHEMA_VERSION,
} from './constants';

// ---------------------------------------------------------------------------
// Types
// ---------------------------------------------------------------------------

/** A DTCG token leaf node. */
export interface TokenValue {
  $type: string;
  $value: string | number;
  $extensions?: Record<string, unknown>;
}

/** Recursive token group — every non-leaf node in a theme object. */
export interface TokenGroup {
  [key: string]: TokenValue | TokenGroup;
}

/** The three built-in Forge UI theme presets. */
export type Preset = (typeof PRESETS)[number];

/** Theme metadata stored under `$extensions.com.forge.ui.theme`. */
export interface ThemeMetadata {
  name: string;
  preset: Preset;
  schemaVersion: string;
}

/** Override metadata stored under `$extensions.com.forge.ui.themeOverride`. */
export interface ThemeOverrideMetadata {
  basePreset: Preset;
  schemaVersion: string;
}

/**
 * A complete Forge UI theme object (DTCG-compatible).
 *
 * Presets (Poise, Prestige, Pulse) are full theme objects. At runtime the
 * build-time default preset is augmented by FI overrides via
 * `applyThemeOverride`.
 */
export type ThemeObject = TokenGroup & {
  $extensions: {
    'com.forge.ui.theme': ThemeMetadata;
    [key: string]: unknown;
  };
  modes: {
    light: TokenGroup;
    dark: TokenGroup;
  };
  platform: {
    web: TokenGroup;
    ios: TokenGroup;
    android: TokenGroup;
  };
};

export type {
  ThemeInputs,
  ThemeSelections,
  ThemeOverride,
  TokenReference,
  LiteralValue,
  SelectedValue,
  LinkedSelection,
  InvariantSelection,
  ModeSpecificOverride,
  TokenOverride,
  TokenOverrides,
} from './override/contracts';

export type Mode = (typeof MODES)[number];
export type Platform = (typeof PLATFORMS)[number];

/**
 * Allowed display font families per preset, consumed by the theme editor for
 * font selection and by consuming apps for validation.
 */
export const presetFonts: Record<Preset, readonly string[]> = {
  poise: ['Crimson Pro', 'Bitter', 'DM Sans'],
  prestige: ['Libre Caslon Text', 'Cormorant', 'Libre Franklin'],
  pulse: ['Outfit', 'Manrope', 'Public Sans'],
} as const;