export const SYSTEM_ROLES = ['super_admin', 'user'] as const;
export const MEMBERSHIP_ROLES = ['admin', 'user'] as const;
export const BUSINESS_ROLES = [
  'it_admin',
  'helpdesk',
  'infrastructure',
  'application',
  'auditor',
  'viewer'
] as const;

export type SystemRole = (typeof SYSTEM_ROLES)[number];
export type MembershipRole = (typeof MEMBERSHIP_ROLES)[number];
export type BusinessRole = (typeof BUSINESS_ROLES)[number];

export const PERMISSIONS = {
  productsRead: 'products:read',
  productsWrite: 'products:write',
  organizationManage: 'organization:manage',
  usersManage: 'users:manage',
  reportRead: 'report:read',
  crmCustomerRead: 'crm.customer.read',
  crmCustomerCreate: 'crm.customer.create',
  crmCustomerUpdate: 'crm.customer.update',
  crmCustomerDelete: 'crm.customer.delete',
  crmContactRead: 'crm.contact.read',
  crmContactCreate: 'crm.contact.create',
  crmContactUpdate: 'crm.contact.update',
  crmContactDelete: 'crm.contact.delete',
  crmEnquiryRead: 'crm.enquiry.read',
  crmEnquiryCreate: 'crm.enquiry.create',
  crmEnquiryUpdate: 'crm.enquiry.update',
  crmEnquiryDelete: 'crm.enquiry.delete',
  crmEnquiryFollowupRead: 'crm.enquiry.followup.read',
  crmEnquiryFollowupCreate: 'crm.enquiry.followup.create',
  crmEnquiryFollowupUpdate: 'crm.enquiry.followup.update',
  crmEnquiryFollowupDelete: 'crm.enquiry.followup.delete',
  crmQuotationRead: 'crm.quotation.read',
  crmQuotationCreate: 'crm.quotation.create',
  crmQuotationUpdate: 'crm.quotation.update',
  crmQuotationDelete: 'crm.quotation.delete',
  crmQuotationItemManage: 'crm.quotation.item.manage',
  crmQuotationCustomerManage: 'crm.quotation.customer.manage',
  crmQuotationTopicManage: 'crm.quotation.topic.manage',
  crmQuotationFollowupManage: 'crm.quotation.followup.manage',
  crmQuotationAttachmentManage: 'crm.quotation.attachment.manage',
  crmQuotationRevisionCreate: 'crm.quotation.revision.create'
} as const;

export type Permission = (typeof PERMISSIONS)[keyof typeof PERMISSIONS];

function getMembershipBasePermissions(role: MembershipRole): Permission[] {
  if (role === 'admin') {
    return [
      PERMISSIONS.productsRead,
      PERMISSIONS.productsWrite,
      PERMISSIONS.organizationManage,
      PERMISSIONS.usersManage,
      PERMISSIONS.crmCustomerRead,
      PERMISSIONS.crmCustomerCreate,
      PERMISSIONS.crmCustomerUpdate,
      PERMISSIONS.crmCustomerDelete,
      PERMISSIONS.crmContactRead,
      PERMISSIONS.crmContactCreate,
      PERMISSIONS.crmContactUpdate,
      PERMISSIONS.crmContactDelete,
      PERMISSIONS.crmEnquiryRead,
      PERMISSIONS.crmEnquiryCreate,
      PERMISSIONS.crmEnquiryUpdate,
      PERMISSIONS.crmEnquiryDelete,
      PERMISSIONS.crmEnquiryFollowupRead,
      PERMISSIONS.crmEnquiryFollowupCreate,
      PERMISSIONS.crmEnquiryFollowupUpdate,
      PERMISSIONS.crmEnquiryFollowupDelete,
      PERMISSIONS.crmQuotationRead,
      PERMISSIONS.crmQuotationCreate,
      PERMISSIONS.crmQuotationUpdate,
      PERMISSIONS.crmQuotationDelete,
      PERMISSIONS.crmQuotationItemManage,
      PERMISSIONS.crmQuotationCustomerManage,
      PERMISSIONS.crmQuotationTopicManage,
      PERMISSIONS.crmQuotationFollowupManage,
      PERMISSIONS.crmQuotationAttachmentManage,
      PERMISSIONS.crmQuotationRevisionCreate
    ];
  }

  return [
    PERMISSIONS.productsRead,
    PERMISSIONS.crmCustomerRead,
    PERMISSIONS.crmContactRead,
    PERMISSIONS.crmEnquiryRead,
    PERMISSIONS.crmEnquiryFollowupRead,
    PERMISSIONS.crmQuotationRead
  ];
}

export function getBusinessRolePermissions(role: BusinessRole): Permission[] {
  switch (role) {
    case 'it_admin':
      return [PERMISSIONS.reportRead];
    case 'helpdesk':
      return [];
    case 'infrastructure':
      return [PERMISSIONS.reportRead];
    case 'application':
      return [PERMISSIONS.reportRead];
    case 'auditor':
      return [PERMISSIONS.reportRead];
    case 'viewer':
    default:
      return [];
  }
}

export function getDefaultBusinessRole(role: MembershipRole): BusinessRole {
  return role === 'admin' ? 'it_admin' : 'viewer';
}

export function getDefaultPermissions(
  role: MembershipRole,
  businessRole: BusinessRole = getDefaultBusinessRole(role)
): Permission[] {
  return [
    ...new Set([...getMembershipBasePermissions(role), ...getBusinessRolePermissions(businessRole)])
  ];
}

export function isSystemRole(value: string): value is SystemRole {
  return SYSTEM_ROLES.includes(value as SystemRole);
}

export function isMembershipRole(value: string): value is MembershipRole {
  return MEMBERSHIP_ROLES.includes(value as MembershipRole);
}

export function isBusinessRole(value: string): value is BusinessRole {
  return BUSINESS_ROLES.includes(value as BusinessRole);
}