import type { PartnerMe, PartnerPermissionKey } from '@dukang/shared-types';

export type PartnerNavKind = 'primary' | 'store_staff' | 'warehouse_staff';

export function isPrimaryAccount(account: PartnerMe | null | undefined): boolean {
  return account?.isPrimary !== false;
}

export function isSubAccount(account: PartnerMe | null | undefined): boolean {
  return !!account && account.isPrimary === false;
}

export function hasPartnerPermission(
  account: PartnerMe | null | undefined,
  permission: PartnerPermissionKey,
): boolean {
  if (!account) return false;
  if (isPrimaryAccount(account)) return true;
  return account.permissions?.includes(permission) ?? false;
}

export function hasAnyPartnerPermission(
  account: PartnerMe | null | undefined,
  permissions: PartnerPermissionKey[],
): boolean {
  return permissions.some((p) => hasPartnerPermission(account, p));
}

/** 与后端 GET /partner/dashboard 权限点一致 */
export function canAccessPartnerDashboard(account: PartnerMe | null | undefined): boolean {
  return hasAnyPartnerPermission(account, [
    'store:create',
    'store:manage',
    'order:view',
    'warehouse:manage',
  ]);
}

/** 门店列表/拓店统计所需权限 */
export function canAccessPartnerStores(account: PartnerMe | null | undefined): boolean {
  return hasAnyPartnerPermission(account, ['store:create', 'store:manage']);
}

/** 编辑资料 / 开闭店 / 重新上传：主账号、门店权限，或历史未配权限的门店类子账号 */
export function canManagePartnerStore(account: PartnerMe | null | undefined): boolean {
  if (!account) return false;
  if (isPrimaryAccount(account)) return true;
  if (isWarehouseStaff(account)) return false;
  if (hasAnyPartnerPermission(account, ['store:manage', 'store:create'])) return true;
  // 合伙人端早期创建的子账号可能 permissions 为空，按门店员工放开
  return !Array.isArray(account.permissions) || account.permissions.length === 0;
}

/** 录入新店 */
export function canCreatePartnerStore(account: PartnerMe | null | undefined): boolean {
  if (!account) return false;
  if (isPrimaryAccount(account)) return true;
  if (isWarehouseStaff(account)) return false;
  if (hasPartnerPermission(account, 'store:create')) return true;
  return !Array.isArray(account.permissions) || account.permissions.length === 0;
}

/** 与后端 GET /partner/orders 权限点一致 */
export function canAccessPartnerOrders(account: PartnerMe | null | undefined): boolean {
  return hasAnyPartnerPermission(account, ['order:view', 'warehouse:manage']);
}

/** 仓库管理员：warehouse:manage，或仅有 order:view（无门店权限） */
export function isWarehouseStaff(account: PartnerMe | null | undefined): boolean {
  if (!account || isPrimaryAccount(account)) return false;
  if (hasPartnerPermission(account, 'warehouse:manage')) return true;
  const hasStore =
    hasPartnerPermission(account, 'store:create') || hasPartnerPermission(account, 'store:manage');
  if (hasPartnerPermission(account, 'order:view') && !hasStore) return true;
  return false;
}

export function getPartnerNavKind(account: PartnerMe | null | undefined): PartnerNavKind {
  if (!account || isPrimaryAccount(account)) return 'primary';
  if (isWarehouseStaff(account)) return 'warehouse_staff';
  return 'store_staff';
}

/** 是否已配置管仓：主账号看 hasWarehouseAccess；子账号还需有仓库相关权限 */
export function hasWarehouseAccess(account: PartnerMe | null | undefined): boolean {
  if (!account) return false;
  if (account.hasWarehouseAccess === false) return false;
  if (account.hasWarehouseAccess === true) return true;
  // 旧缓存无字段时保守：主账号未知视为无，避免误展示全城订单
  return false;
}

export function partnerHomePath(account: PartnerMe | null | undefined): string {
  return '/';
}

const STORE_STAFF_PREFIXES = ['/', '/stores', '/me', '/leaderboard', '/login'];
const WAREHOUSE_STAFF_PREFIXES = ['/', '/orders', '/me', '/leaderboard', '/login'];

export function isSubAccountPath(pathname: string, navKind: PartnerNavKind = 'store_staff'): boolean {
  if (pathname === '/login') return true;
  const prefixes = navKind === 'warehouse_staff' ? WAREHOUSE_STAFF_PREFIXES : STORE_STAFF_PREFIXES;
  return prefixes.some(
    (prefix) => prefix !== '/login' && (pathname === prefix || pathname.startsWith(`${prefix}/`)),
  );
}