import type { BgpCommunity, DohProfile, ModuleRow } from '$lib/api/types.js';

export const NONE_OPTION = '__none__';

export function supportsCsvIO(type: ModuleRow['type'] | null | undefined): boolean {
	return type === 'AS_PREFIXES' || type === 'DOMAINS' || type === 'IP_RANGES';
}

export function sanitizeFilenamePart(v: string): string {
	const cleaned = v
		.trim()
		.toLowerCase()
		.replace(/[^a-z0-9._-]+/g, '-')
		.replace(/-+/g, '-')
		.replace(/^[-_.]+|[-_.]+$/g, '');
	return cleaned || 'module';
}

export function communityLabel(id: string | null, communities: BgpCommunity[]): string {
	if (!id) return '—';
	const c = communities.find((x) => x.id === id);
	if (!c) return id.slice(0, 8) + '…';
	const t = c.title?.trim();
	return t || c.community;
}

export function communityOptionLabel(c: BgpCommunity): string {
	const t = c.title?.trim();
	return t || c.community;
}

export function nullableSelectValue(value: string | null | undefined): string {
	if (value === null || value === undefined || value === '') return NONE_OPTION;
	return value;
}

export function fromNullableSelect(value: string): string | null {
	if (value === NONE_OPTION || value === '') return null;
	return value;
}

export function moduleDohProfileIds(modRow: ModuleRow | null): string[] {
	if (!modRow) return [];
	if (modRow.doh_profile_ids?.length) return modRow.doh_profile_ids;
	return modRow.doh_profile_id ? [modRow.doh_profile_id] : [];
}

export function dohProfileLabel(id: string, dohProfiles: DohProfile[]): string {
	const p = dohProfiles.find((d) => d.id === id);
	return p ? (p.name?.trim() ? `${p.name} (${p.url})` : p.url) : id.slice(0, 8) + '…';
}

export function normalizeCdnSourceKind(k: string): 'plaintext' | 'json' {
	return k.trim().toLowerCase() === 'json' ? 'json' : 'plaintext';
}

export function syncSelection(selected: Set<string>, existingIds: string[]): Set<string> {
	const validIds = new Set(existingIds);
	return new Set([...selected].filter((id) => validIds.has(id)));
}