import {
  treasurySectionAllowed,
  type RolePermissionKey,
  type TreasurySectionKey,
  type UserRole,
} from '@mento/shared';

/** مسیر صفحه ← مجوز بخش؛ هم‌تراز SectionPermissionGuard در API */
const PATH_PERMISSIONS: Array<[prefix: string, key: RolePermissionKey]> = [
  ['/contacts', 'customers'],
  ['/leads', 'leads'],
  ['/pipeline', 'sales'],
  ['/deals', 'sales'],
  ['/sales/', 'sales'],
  ['/settings/pipelines', 'sales'],
  ['/invoices', 'billing'],
  ['/quotes', 'billing'],
  ['/settings/products', 'products'],
  ['/inventory', 'products'],
  ['/activities', 'activities'],
  ['/notes', 'notes'],
  ['/attachments', 'notes'],
  ['/reports', 'reports'],
  ['/settings/audit-logs', 'audit'],
];

export function sectionPermissionForPath(path: string): RolePermissionKey | null {
  const clean = path.split(/[?#]/)[0] ?? path;
  for (const [prefix, key] of PATH_PERMISSIONS) {
    if (clean === prefix || clean.startsWith(prefix.endsWith('/') ? prefix : `${prefix}/`)) {
      return key;
    }
  }
  return null;
}

/** مالک و مدیر همیشه؛ بقیه با تیک همان بخش در نقششان */
export function hasSectionPermission(
  role: UserRole | string | null | undefined,
  permissions: readonly string[] | null | undefined,
  key: RolePermissionKey,
): boolean {
  if (role === 'owner' || role === 'admin') return true;
  return Boolean(permissions?.includes(key));
}

function financeSection(path: string): TreasurySectionKey | null {
  const clean = path.split(/[?#]/)[0] ?? path;
  if (!clean.startsWith('/finance')) return null;
  if (clean.startsWith('/finance/payroll')) return 'treasury_payroll';
  if (clean.startsWith('/finance/incomes')) return 'treasury_incomes';
  if (clean.startsWith('/finance/expenses')) return 'treasury_expenses';
  if (clean.startsWith('/finance/receivables')) return 'treasury_receivables';
  if (clean.startsWith('/finance/accounts')) return 'treasury_accounts';
  if (clean.startsWith('/finance/recurring')) return 'treasury_recurring';
  if (clean.startsWith('/finance/reports')) return 'treasury_reports';
  if (clean.startsWith('/finance/audit')) return 'treasury_audit';
  if (clean.startsWith('/finance/categories')) return 'treasury_categories';
  return 'treasury_dashboard';
}

export function canOpenFinancePath(
  role: UserRole | string | null | undefined,
  permissions: readonly string[] | null | undefined,
  path: string,
): boolean {
  const section = financeSection(path);
  if (!section) return true;
  return treasurySectionAllowed(role, permissions, section);
}

const FINANCE_ENTRIES: Array<{ path: string; section: TreasurySectionKey }> = [
  { path: '/finance', section: 'treasury_dashboard' },
  { path: '/finance/incomes', section: 'treasury_incomes' },
  { path: '/finance/expenses', section: 'treasury_expenses' },
  { path: '/finance/receivables', section: 'treasury_receivables' },
  { path: '/finance/accounts', section: 'treasury_accounts' },
  { path: '/finance/payroll', section: 'treasury_payroll' },
  { path: '/finance/recurring', section: 'treasury_recurring' },
  { path: '/finance/reports', section: 'treasury_reports' },
  { path: '/finance/audit', section: 'treasury_audit' },
  { path: '/finance/categories', section: 'treasury_categories' },
];

/** اولین صفحهٔ مالی که این نقش واقعاً می‌تواند باز کند. */
export function firstAllowedFinancePath(
  role: UserRole | string | null | undefined,
  permissions: readonly string[] | null | undefined,
): string | null {
  for (const entry of FINANCE_ENTRIES) {
    if (treasurySectionAllowed(role, permissions, entry.section)) return entry.path;
  }
  return null;
}

export function canOpenPath(
  role: UserRole | string | null | undefined,
  permissions: readonly string[] | null | undefined,
  path: string,
): boolean {
  const key = sectionPermissionForPath(path);
  return !key || hasSectionPermission(role, permissions, key);
}