/**
 * Centralized Immich API client for rPhotos.
 *
 * All calls use the single admin RPHOTOS_API_KEY internally.
 * This replaces scattered raw fetch calls in mod.ts.
 */

const IMMICH_BASE = process.env.RPHOTOS_IMMICH_URL || "http://localhost:2284";
const IMMICH_API_KEY = process.env.RPHOTOS_API_KEY || "";

function headers(extra?: Record<string, string>): Record<string, string> {
	return { "x-api-key": IMMICH_API_KEY, ...extra };
}

// ── Albums ──

export async function immichCreateAlbum(name: string, description?: string) {
	const res = await fetch(`${IMMICH_BASE}/api/albums`, {
		method: "POST",
		headers: headers({ "Content-Type": "application/json" }),
		body: JSON.stringify({ albumName: name, description: description || "" }),
	});
	if (!res.ok) throw new Error(`Immich createAlbum failed: ${res.status}`);
	return res.json() as Promise<{ id: string; albumName: string }>;
}

export async function immichDeleteAlbum(albumId: string) {
	const res = await fetch(`${IMMICH_BASE}/api/albums/${albumId}`, {
		method: "DELETE",
		headers: headers(),
	});
	if (!res.ok) throw new Error(`Immich deleteAlbum failed: ${res.status}`);
}

export async function immichGetAlbum(albumId: string) {
	const res = await fetch(`${IMMICH_BASE}/api/albums/${albumId}`, {
		headers: headers(),
	});
	if (!res.ok) return null;
	return res.json();
}

// ── Search ──

export async function immichSearchInAlbum(albumId: string, opts: { size?: number; type?: string } = {}) {
	const res = await fetch(`${IMMICH_BASE}/api/search/metadata`, {
		method: "POST",
		headers: headers({ "Content-Type": "application/json" }),
		body: JSON.stringify({
			size: opts.size || 50,
			order: "desc",
			type: opts.type || "IMAGE",
			...(albumId ? { albumIds: [albumId] } : {}),
		}),
	});
	if (!res.ok) return { items: [] };
	const data = await res.json();
	return { items: data.assets?.items || [] };
}

// ── Assets ──

export async function immichUploadAsset(formData: FormData) {
	const res = await fetch(`${IMMICH_BASE}/api/assets`, {
		method: "POST",
		headers: { "x-api-key": IMMICH_API_KEY },
		body: formData,
	});
	if (!res.ok) throw new Error(`Immich upload failed: ${res.status}`);
	return res.json() as Promise<{ id: string; status: string }>;
}

export async function immichAddAssetsToAlbum(albumId: string, assetIds: string[]) {
	const res = await fetch(`${IMMICH_BASE}/api/albums/${albumId}/assets`, {
		method: "PUT",
		headers: headers({ "Content-Type": "application/json" }),
		body: JSON.stringify({ ids: assetIds }),
	});
	if (!res.ok) throw new Error(`Immich addAssets failed: ${res.status}`);
	return res.json();
}

export async function immichDeleteAssets(assetIds: string[]) {
	const res = await fetch(`${IMMICH_BASE}/api/assets`, {
		method: "DELETE",
		headers: headers({ "Content-Type": "application/json" }),
		body: JSON.stringify({ ids: assetIds, force: true }),
	});
	if (!res.ok) throw new Error(`Immich deleteAssets failed: ${res.status}`);
}

export async function immichGetAssetThumbnail(id: string, size: string = "thumbnail") {
	const res = await fetch(`${IMMICH_BASE}/api/assets/${id}/thumbnail?size=${size}`, {
		headers: headers(),
	});
	if (!res.ok) return null;
	return {
		body: await res.arrayBuffer(),
		contentType: res.headers.get("Content-Type") || "image/jpeg",
	};
}

export async function immichGetAssetOriginal(id: string) {
	const res = await fetch(`${IMMICH_BASE}/api/assets/${id}/original`, {
		headers: headers(),
	});
	if (!res.ok) return null;
	return {
		body: await res.arrayBuffer(),
		contentType: res.headers.get("Content-Type") || "image/jpeg",
	};
}