/**
 * `createDatingApp` — opinionated `createActiveApp` composition for the
 * Nexo demo. Picks a fixed service schema so consumer components can
 * type their `App` prop as `DatingApp` and get autocomplete on
 * `App.lang`, `App.session`, `App.cache`, … without falling back to
 * `unknown`.
 *
 * Contract intentionally narrower than the README's full list: `auth`,
 * `perm` and `connection` need port wiring that lives outside Phase 0
 * scope (auth flows go through `DatingApiClient` directly while the
 * artifact-level `App.auth` waits for a Nexo-shaped HTTP port). They
 * will be added by their respective phases — see
 * `src/web/routes/dating/plan-implementacion.md`.
 */

import { createActiveApp, type ActiveApp } from '$active-app';
import {
	defineActiveCache,
	defineActiveFormat,
	defineActiveFrontend,
	defineActiveLang,
	defineActivePrefs,
	defineActiveSession,
	defineActiveStorage,
	defineEngineHttp,
	defineEngineSium
} from '$active-app/services';
import type { PrefsCapabilities } from '$libs/prefs';
import type { DatingUser } from './types.ts';
import { createDatingApiClient, type DatingApiClient } from './api.ts';

/**
 * Bootstrap lang schema. Phase 0 ships only the strings the shell
 * needs; later phases register their own namespaces via
 * `App.lang.extend(...)` rather than threading more keys through
 * here.
 */
export const NEXO_LANG_SCHEMA = {
	nexo: {
		title: { es: 'Nexo', en: 'Nexo' },
		tagline: {
			es: 'Demo del ecosistema Active sobre un producto real.',
			en: 'Active ecosystem demo running on a real product.'
		},
		nav: {
			discover: { es: 'Descubre', en: 'Discover' },
			matches: { es: 'Matches', en: 'Matches' },
			profile: { es: 'Perfil', en: 'Profile' },
			safety: { es: 'Seguridad', en: 'Safety' },
			devtools: { es: 'Devtools', en: 'Devtools' }
		},
		auth: {
			login: { es: 'Iniciar sesión', en: 'Sign in' },
			register: { es: 'Crear cuenta', en: 'Sign up' },
			logout: { es: 'Cerrar sesión', en: 'Sign out' }
		}
	}
} as const;

export const NEXO_PREFS_CAPABILITIES: PrefsCapabilities = {
	languages: ['es', 'en'],
	locales: ['es-ES', 'en-US'],
	currencies: ['EUR', 'USD'],
	unitSystems: ['metric', 'imperial'],
	themes: ['light', 'dark', 'system'],
	densities: ['compact', 'comfortable', 'spacious'],
	motions: ['allow', 'reduce', 'system'],
	defaults: {
		language: 'es',
		locale: 'es-ES',
		currency: 'EUR',
		timezone: 'Europe/Madrid',
		unitSystem: 'metric',
		theme: 'light',
		density: 'comfortable',
		motion: 'allow',
		direction: 'ltr'
	}
};

export interface CreateDatingAppOptions {
	/**
	 * Override the Nexo API base URL. Defaults to the standalone server
	 * at `http://127.0.0.1:8787` (see `servers/dating/README.md`).
	 */
	readonly apiBase?: string;
	/**
	 * Optional `fetch` override — typically `event.fetch` during SSR or
	 * a mocked transport in tests.
	 */
	readonly fetch?: typeof fetch;
	/**
	 * Frontend mount target. SvelteKit pages pass the layout root here
	 * so theme / density / direction get applied to the right node.
	 */
	readonly frontendTarget?: () => HTMLElement | null;
}

/**
 * Concrete `ActiveApp` shape exposed by `createDatingApp`. Components
 * accept `App: DatingApp` to keep autocomplete and type-checked
 * service access; using a generic `ActiveApp` here would degrade
 * every service slot to `unknown`.
 */
export type DatingApp = ReturnType<typeof composeApp>;

function composeApp(options: CreateDatingAppOptions) {
	return createActiveApp({
		services: {
			lang: defineActiveLang({
				schema: NEXO_LANG_SCHEMA,
				defaultLocale: 'es',
				fallbackChain: ['en']
			}),
			prefs: defineActivePrefs({ capabilities: NEXO_PREFS_CAPABILITIES }),
			storage: defineActiveStorage({ namespace: 'nexo' }),
			frontend: defineActiveFrontend({
				target: options.frontendTarget,
				theme: 'base',
				mode: 'auto',
				density: 'comfortable'
			}),
			format: defineActiveFormat(),
			cache: defineActiveCache({
				defaultMemoryAdapter: { suppressProductionWarning: true }
			}),
			http: defineEngineHttp({
				fetch: options.fetch,
				timeout: 10_000,
				retry: { limit: 1 }
			}),
			session: defineActiveSession<DatingUser>({ schemas: {} }),
			sium: defineEngineSium()
		}
	});
}

/**
 * Compose a `DatingApp` plus the Nexo HTTP client. The two are
 * returned together because almost every component needs both —
 * `App` for ecosystem state and `api` for typed server calls — and
 * keeping the construction in one helper means the demo only has one
 * canonical wiring point.
 *
 * Disposing the wrapper tears the App down; the API client is
 * stateless and needs no lifecycle.
 */
export interface DatingAppHandle {
	readonly App: DatingApp;
	readonly api: DatingApiClient;
	dispose(): void;
}

export function createDatingApp(options: CreateDatingAppOptions = {}): DatingAppHandle {
	const App = composeApp(options);
	const api = createDatingApiClient({
		base: options.apiBase,
		fetch: options.fetch
	});
	return {
		App,
		api,
		dispose: () => App.dispose()
	};
}

/**
 * Marker re-export so consumers that only need the type don't pull
 * the runtime in just for `ActiveApp`.
 */
export type { ActiveApp };