import { createClient } from '@supabase/supabase-js';
import {
  serviceHeaders,
  supabaseUrl,
} from '@/lib/agency';

export const ASSETS_BUCKET = 'tenant-assets';
export const MAX_ASSET_BYTES = 80 * 1024 * 1024; // 80 MB

export function serviceSupabase() {
  const key = process.env.SUPABASE_SERVICE_ROLE_KEY?.trim();
  if (!key) return null;
  return createClient(supabaseUrl(), key, {
    auth: { persistSession: false, autoRefreshToken: false },
  });
}

export async function ensureAssetsBucket(): Promise<{ ok: boolean; error?: string }> {
  const headers = serviceHeaders();
  if (!headers) return { ok: false, error: 'no service role' };

  const list = await fetch(`${supabaseUrl()}/storage/v1/bucket`, {
    headers,
    cache: 'no-store',
  });
  if (list.ok) {
    const buckets = (await list.json()) as { id: string }[];
    if (buckets.some((b) => b.id === ASSETS_BUCKET)) {
      return { ok: true };
    }
  }

  const create = await fetch(`${supabaseUrl()}/storage/v1/bucket`, {
    method: 'POST',
    headers: { ...headers, 'Content-Type': 'application/json' },
    body: JSON.stringify({
      id: ASSETS_BUCKET,
      name: ASSETS_BUCKET,
      public: false,
      file_size_limit: MAX_ASSET_BYTES,
      allowed_mime_types: null,
    }),
  });
  if (!create.ok) {
    const text = await create.text();
    // race: already exists
    if (text.toLowerCase().includes('already') || create.status === 409) {
      return { ok: true };
    }
    return { ok: false, error: text.slice(0, 300) };
  }
  return { ok: true };
}

export function sanitizeFolder(raw: string): string {
  return raw
    .trim()
    .replace(/\\/g, '/')
    .replace(/\.\./g, '')
    .replace(/^\/+|\/+$/g, '')
    .replace(/[^a-zA-Z0-9/_ .-]/g, '-')
    .slice(0, 180);
}

export function sanitizeFileName(name: string): string {
  const base = name.split(/[/\\]/).pop() || 'file';
  return base.replace(/[^\w.\- ()áéíóúÁÉÍÓÚñÑ]+/gi, '_').slice(0, 180);
}