import type { Deck, DeckCreate, DeckUpdate } from '@cards/domain';
import { api, apiForm } from './client.ts';

export function listDecks(opts: { forkedFromMarketplace?: boolean } = {}) {
	const qs = opts.forkedFromMarketplace ? '?forked_from_marketplace=true' : '';
	return api<{ decks: Deck[]; total: number }>(`/api/v1/decks${qs}`);
}

export function getDeck(id: string) {
	return api<Deck>(`/api/v1/decks/${id}`);
}

export function createDeck(input: DeckCreate) {
	return api<Deck>('/api/v1/decks', { method: 'POST', body: input });
}

export function updateDeck(id: string, patch: DeckUpdate) {
	return api<Deck>(`/api/v1/decks/${id}`, { method: 'PATCH', body: patch });
}

export function deleteDeck(id: string) {
	return api<{ deleted: string }>(`/api/v1/decks/${id}`, { method: 'DELETE' });
}

export function generateDeck(input: { prompt: string; language?: 'de' | 'en'; count?: number; url?: string }) {
	return api<{ deck: Deck; cards_created: number }>('/api/v1/decks/generate', {
		method: 'POST',
		body: input,
	});
}

export function fetchDistractors(
	deckId: string,
	opts: { cardId?: string; count?: number; field?: string } = {},
) {
	const params = new URLSearchParams();
	if (opts.cardId) params.set('card_id', opts.cardId);
	if (opts.count) params.set('count', String(opts.count));
	if (opts.field) params.set('field', opts.field);
	const qs = params.size ? `?${params}` : '';
	return api<{ distractors: string[] }>(`/api/v1/decks/${deckId}/distractors${qs}`);
}

export function generateDeckFromImage(
	files: File | File[],
	opts: { language?: 'de' | 'en'; count?: number; url?: string },
) {
	const arr = Array.isArray(files) ? files : [files];

	// URL-only (no files): send as JSON — FormData without file parts fails in Bun
	if (arr.length === 0) {
		return api<{ deck: Deck; cards_created: number }>('/api/v1/decks/from-image', {
			method: 'POST',
			body: { language: opts.language, count: opts.count, url: opts.url },
		});
	}

	const form = new FormData();
	for (const f of arr) form.append('file', f);
	if (opts.language) form.append('language', opts.language);
	if (opts.count != null) form.append('count', String(opts.count));
	if (opts.url) form.append('url', opts.url);
	return apiForm<{ deck: Deck; cards_created: number }>('/api/v1/decks/from-image', form);
}