import { API_BASE, ApiError } from './client.ts';
import { devUser } from '$lib/auth/dev-stub.svelte.ts';

export interface MediaUploadResult {
	id: string;
	url: string;
	mime_type: string;
	kind: 'image' | 'audio' | 'video' | 'other';
	size_bytes: number;
	original_filename: string | null;
}

/**
 * Lädt ein einzelnes File via multipart/form-data hoch. Anders als der
 * Standard-API-Helper geht das nicht über `Content-Type: application/json`,
 * deshalb hier ein eigener Pfad mit FormData + manuellem fetch.
 */
export async function uploadMedia(file: File | Blob, filename?: string): Promise<MediaUploadResult> {
	const form = new FormData();
	const wrapped = file instanceof File ? file : new File([file], filename ?? 'upload.bin');
	form.append('file', wrapped);

	await devUser.ensureFreshToken();

	const buildHeaders = (): Record<string, string> => {
		const h: Record<string, string> = {};
		if (devUser.token) h['Authorization'] = `Bearer ${devUser.token}`;
		else if (devUser.stubId) h['X-User-Id'] = devUser.stubId;
		return h;
	};

	let res = await fetch(`${API_BASE}/api/v1/media/upload`, {
		method: 'POST',
		body: form,
		headers: buildHeaders(),
	});

	if (res.status === 401 && devUser.token) {
		const refreshed = await devUser.tryRefresh();
		if (refreshed) {
			res = await fetch(`${API_BASE}/api/v1/media/upload`, {
				method: 'POST',
				body: form,
				headers: buildHeaders(),
			});
		}
	}

	if (!res.ok) {
		let body: unknown = null;
		try {
			body = await res.json();
		} catch {
			body = await res.text().catch(() => null);
		}
		throw new ApiError(res.status, body, `media upload failed: ${res.status}`);
	}
	return res.json();
}